1,546 results on '"H. MacPherson"'
Search Results
2. The French Labor Courts: Judgment by Peers William H. MacPherson William H. McPHERSON Frederic Meyers
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REID, Hubert
- Published
- 1967
3. The Birds of Banks Island T. H. Manning E. O. Höhn A. H. MacPherson
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Eisenmann, E.
- Published
- 1958
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4. Spencer and Spencerism H. MacPherson
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MacLennan, S. F.
- Published
- 1901
5. Prenatal exposure to phthalates and phenols and infant endocrine-sensitive outcomes: The MIREC study
- Author
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Tye E. Arbuckle, Amisha Agarwal, Susan H. MacPherson, William D. Fraser, Sheela Sathyanarayana, Tim Ramsay, Linda Dodds, Gina Muckle, Mandy Fisher, Warren Foster, Mark Walker, and Patricia Monnier
- Subjects
Environmental sciences ,GE1-350 - Abstract
Background: Anogenital distance (AGD) and the second to fourth finger (2D:4D) digit ratio may be early markers of in utero androgen exposure for the infant. Phthalates and phenols have been identified as endocrine disrupting chemicals. Objectives: To study the association between prenatal exposure to phthalates, bisphenol A (BPA) and triclosan (TCS) and AGD and the 2D:4D digit ratios. Methods: Single spot urine samples were collected in the first trimester from the MIREC Study and analyzed for phthalates and phenols. Anogenital distance (n = 394) at birth and 2D:4D digit ratios (n = 420) at 6 months were measured in male and female infants. Associations between maternal concentrations of phenols and phthalate metabolites and these outcomes were estimated using multiple linear regression models. Results: In females, the anoclitoris distance (ACD) was negatively associated with mono-benzyl phthalate (MBzP) (β = −1.24; 95% CI −1.91, −0.57) and positively associated with mono-ethyl phthalate (MEP) (β = 0.65; 95% CI 0.12, 1.18) (masculinizing). In males, anopenile distance (APD) was positively associated with mono-n-butyl phthalate (MnBP) (β = 1.17; 95% CI 0.02, 2.32) and the molar sum of low molecular weight phthalates (ΣLMW). Female 2D:4D of the right hand was positively associated with MnBP and negatively with total BPA (masculinizing). Conclusions: Significant associations were only observed for the long AGD metrics. Positive associations were observed between MnBP or LMW phthalates and APD in males. In females, prenatal MEP was associated with a masculinizing effect on ACD, while MBzP was associated with a feminizing effect. No significant associations were observed between prenatal phenols and AGD. Given the paucity of research on digit ratios and prenatal chemical exposures, it is difficult to say whether this metric will be a useful marker of prenatal androgen or anti-androgen exposure. Given the large number of associations examined, the statistical associations observed may have been due to Type 1 error. The inconsistencies in results between studies suggest that this issue is yet to be resolved. Keywords: Phthalates, Bisphenol A, Triclosan, Anogenital distance, Digit length ratio, Pregnancy
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- 2018
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6. Longer term clinical and economic benefits of offering acupuncture care to patients with chronic low back pain
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K Thomas, H MacPherson, J Ratcliffe, L Thorpe, J Brazier, M Campbell, M Fitter, M Roman, S Walters, and J Nicholl
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Medical technology ,R855-855.5 - Published
- 2005
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7. Muscle disorders * 111. The impact of fatigue in patients with idiopathic inflammatory myopathy: a mixed method study
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R. Campbell, D. Hofmann, S. Hatch, P. Gordon, H. Lempp, L. Das, P. Blumbergs, V. Limaye, E. Vermaak, N. McHugh, M. H. Edwards, K. Jameson, A. A. Sayer, E. Dennison, C. Cooper, F. B. Salvador, C. Huertas, D. Isenberg, E. J. Jackson, A. Middleton, D. Churchill, K. Walker-Bone, P. R. Worsley, S. Mottram, M. Warner, D. Morrissey, S. Gadola, A. Carr, M. Stokes, R. N. Srivastava, D. Sanghi, A. Elbaz, A. Mor, G. Segal, M. Drexler, D. Norman, E. Peled, N. Rozen, Y. Goryachev, E. M. Debbi, A. Haim, A. Wolf, R. Debi, M. S. Cohen, I. Igolnikov, Y. Bar Ziv, V. Benkovich, B. Bernfeld, J. Collins, R. J. Moots, P. D. Clegg, P. I. Milner, H. D. Ejtehadi, P. N. Nelson, C. Wenham, S. Balamoody, R. Hodgson, P. Conaghan, R. Wilkie, M. Blagojevic, K. P. Jordan, J. Mcbeth, M. J. Peffers, R. J. Beynon, D. J. Thornton, R. Chapman, V. Chapman, D. Walsh, S. Kelly, M. Hui, W. Zhang, S. Doherty, F. Rees, K. Muir, R. Maciewicz, M. Doherty, S. Snelling, R. K. Davidson, T. Swingler, A. Price, I. Clark, E. Stockley, G. Hathway, H. Faas, D. Auer, G. Hirsch, E. Hale, G. Kitas, R. Klocke, A. Abraham, M. S. Pearce, K. D. Mann, R. M. Francis, F. Birrell, M. Tucker, S. J. Mellon, L. Jones, A. J. Price, P. A. Dieppe, H. S. Gill, S. Ashraf, D. A. Walsh, D. McCollum, C. McCabe, S. Grieve, J. Shipley, R. Gorodkin, A. G. Oldroyd, B. Evans, C. Greenbank, M. Bukhari, R. Rajak, C. Bennett, A. Williams, J. C. Martin, R. Abdulkader, C. MacNicol, K. Brixey, S. Stephenson, G. Clunie, R. N. Andrews, E. M. Clark, V. C. Gould, L. Carter, L. Morrison, J. H. Tobias, S. R. Pye, D. Vanderschueren, T. W. O'Neill, D. M. Lee, I. Jans, J. Billen, E. Gielen, M. Laurent, F. Claessens, J. E. Adams, K. A. Ward, G. Bartfai, F. Casanueva, J. D. Finn, G. Forti, A. Giwercman, T. S. Han, I. Huhtaniemi, K. Kula, M. E. Lean, N. Pendleton, M. Punab, F. C. Wu, S. Boonen, C. Mercieca, J. Webb, A. Bhalla, S. Fairbanks, K. E. Moss, C. Collins, P. Sedgwick, J. Parker, N. C. Harvey, Z. A. Cole, S. R. Crozier, G. Ntani, P. A. Mahon, S. M. Robinson, H. M. Inskip, K. M. Godfrey, E. M. Dennison, M. Bridges, S. Ruddick, C. R. Holroyd, P. Mahon, K. Godfrey, T. McNeilly, C. McNally, T. Beringer, M. Finch, A. Coda, J. Davidson, J. Walsh, P. Fowlie, T. Carline, D. Santos, P. Patil, C. Rawcliffe, A. Olaleye, S. Moore, A. Fox, D. Sen, Y. Ioannou, S. Nisar, K. Rankin, M. Birch, S. Finnegan, M. Rooney, D. S. Gibson, A. Malviya, C. M. Ferris, S. P. Rushton, H. E. Foster, H. Hanson, K. Muthumayandi, D. J. Deehan, L. Birt, F. Poland, A. MacGregor, K. Armon, M. Pfeil, F. McErlane, M. W. Beresford, E. M. Baildam, W. Thomson, K. Hyrich, A. Chieng, J. Gardner-Medwin, M. Lunt, L. Wedderburn, K. Newell, A. Evans, G. Manning, C. Scaife, C. McAllister, S. R. Pennington, M. Duncan, T. Moore, C. Pericleous, S. C. Croca, I. Giles, K. Alber, H. Yong, A. Midgely, A. Rahman, M. Rzewuska, C. Mallen, V. Y. Strauss, J. Belcher, G. Peat, R. Byng-Maddick, M. Wijendra, H. Penn, E. Roddy, S. Muller, R. Hayward, F. Kamlow, A. Pakozdi, A. Jawad, D. J. Green, S. L. Hider, S. Singh Bawa, S. Bawa, A. Turton, M. Palmer, J. Lewis, T. Moss, C. E. Goodchild, N. Tang, D. Scott, P. Salkovskis, S. Selvan, L. Williamson, N. Thalayasingam, M. Higgins, V. Saravanan, M. Rynne, J. D. Hamilton, C. Heycock, C. Kelly, S. Norton, A. Sacker, J. Done, A. Young, J. S. Smolen, R. M. Fleischmann, P. Emery, R. F. van Vollenhoven, B. Guerette, S. Santra, H. Kupper, L. Redden, A. Kavanaugh, E. C. Keystone, D. van der Heijde, M. E. Weinblatt, N. Mozaffarian, S. Liu, N. Zhang, S. Wilkinson, M. Riaz, A. J. Ostor, M. K. Nisar, G. Burmester, X. Mariette, F. Navarro-Blasco, U. Oezer, S. Kary, K. Unnebrink, P. Jobanputra, F. Maggs, A. Deeming, D. Carruthers, E. Rankin, A. Jordan, A. Faizal, C. Goddard, M. Pugh, S. Bowman, S. Brailsford, P. Nightingale, N. Tugnet, S. C. Cooper, K. M. Douglas, C. S. Edwin Lim, S. Bee Lian Low, C. Joy, L. Hill, P. Davies, S. Mukherjee, P. Cornell, S. L. Westlake, S. Richards, F. Rahmeh, P. W. Thompson, F. Breedveld, E. Keystone, R. Landewe, M. McIlraith, C. Dharmapalaiah, L. Shand, G. Rose, R. Watts, A. Eldashan, B. Dasgupta, F. A. Borg, G. M. Bell, A. E. Anderson, R. A. Harry, J. N. Stoop, C. M. Hilkens, J. Isaacs, A. Dickinson, E. McColl, S. Banik, L. Smith, J. France, A. Rutherford, A. Scott Russell, J. Smith, I. Jassim, R. Withrington, P. Bacon, D. De Lord, L. McGregor, I. Morrison, A. Stirling, D. R. Porter, S. A. Saunders, S. Else, O. Semenova, H. Thompson, O. Ogunbambi, S. Kallankara, E. Baguley, Y. Patel, S. Alzabin, S. Abraham, T. E. Taher, A. Palfeeman, D. Hull, K. McNamee, E. Pathan, A. Kinderlerer, P. Taylor, R. O. Williams, R. A. Mageed, O. Iaremenko, G. Mikitenko, M. Ferrari, T. Kamalati, C. Pitzalis, F. Pearce, S. Tosounidou, K. Obrenovic, N. Erb, J. Packham, R. Sandhu, C. White, C. M. Cardy, E. Justice, M. Frank, L. Li, M. Lloyd, A. Ahmed, S. Readhead, A. Ala, M. Fittall, J. Manson, J. Sibilia, R. Marc Flipo, B. Combe, C. Gaillez, M. Le Bars, C. Poncet, A. Elegbe, R. Westhovens, R. Hassanzadeh, C. Mangan, R. Fleischmann, R. van Vollenhoven, T. W. J. Huizinga, R. Goldermann, B. Duncan, J. Timoshanko, K. Luijtens, O. Davies, M. Dougados, J. Hewitt, M. Owlia, M. Schiff, R. Alten, J. L. Kaine, P. T. Nash, I. Delaet, K. Qi, M. C. Genovese, J. Clark, S. Kardash, E. Wong, R. Hull, F. McCrae, R. Shaban, L. Thomas, S. Young-Min, J. Ledingham, A. Covarrubias Cobos, G. Leon, E. F. Mysler, M. W. Keiserman, R. M. Valente, J. Abraham Simon Campos, W. Porawska, J. H. Box, C. W. Legerton, E. L. Nasonov, P. Durez, R. Pappu, J. Teng, C. J. Edwards, N. Arden, J. Campbell, T. van Staa, C. Housden, I. Sargeant, E. Choy, S. McAuliffe, K. Roberts, P. Sarzi-Puttini, A. Andrianakos, T. P. Sheeran, D. Choquette, A. Finckh, M.-L. Desjuzeur, E. K. Gemmen, C. Mpofu, J.-E. Gottenberg, P. Shah, M. Cox, A. Nye, A. O'Brien, P. Jones, G. T. Jones, P. Paudyal, H. MacPherson, J. Sim, E. Ernst, M. Fisken, G. Lewith, J. Tadman, G. J. Macfarlane, P. Bertin, C. Arendt, I. Terpstra, B. VanLunen, M. de Longueville, H. Zhou, A. Cai, E. Lacy, J. Kay, E. Matteson, C. Hu, E. Hsia, M. Doyle, M. Rahman, D. Shealy, D. L. Scott, F. Ibrahim, H. Abozaid, A. Hassell, M. Plant, D. Walker, G. Simpson, A. Kowalczyk, P. Prouse, A. Brown, M. George, N. Kumar, K. Mackay, S. Marshall, C. L. Ludivico, B. Murthy, M. Corbo, W. Samborski, F. Berenbaum, J. Ambrugeat, B. Bennett, H. Burkhardt, V. Bykerk, J. Roman Ivorra, J. Wollenhaupt, A. Stancati, C. Bernasconi, D. G. I. Scott, P. Claydon, C. Ellis, S. Buchan, J. Pope, C. O. Bingham, E. M. Massarotti, G. Coteur, M. Weinblatt, C. Ball, T. Ainsworth, J. Kermik, J. Woodham, I. Haq, E. Quesada-Masachs, A. Carolina Diaz, G. Avila, I. Acosta, X. Sans, C. Alegre, S. Marsal, D. McWilliams, P. D. Kiely, R. Bolce, J. Wang, M. Ingham, R. Dehoratius, D. Decktor, V. Rao, A. Pavlov, M. Klearman, D. Musselman, J. Giles, J. Bathon, N. Sattar, J. Lee, D. Baxter, J. S. McLaren, M.-M. Gordon, K. Z. Thant, E. L. Williams, S. Earl, P. White, J. Williams, A. K. Jan, A. I. Bhatti, C. Stafford, M. Carolan, and S. A. Ramakrishnan
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medicine.medical_specialty ,Comorbid anxiety ,business.industry ,Osteoarthritis ,Primary care ,medicine.disease ,Rheumatology ,Internal medicine ,General practice ,medicine ,Anxiety ,Pharmacology (medical) ,In patient ,medicine.symptom ,business ,Depression (differential diagnoses) - Published
- 2012
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8. An assessment of Malaysian wooden furniture manufacturers’ readiness to embrace chain of custody (COC) certification
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Jegatheswaran Ratnasingam, T. H. Macpherson, and Florin Ioras
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Certified wood ,Engineering ,business.industry ,Market potential ,General Materials Science ,Forestry ,Price premium ,Wood product ,Certification ,Marketing ,business ,Rubberwood ,Chain of custody - Abstract
Although Malaysia is a major producer and exporter of wood products in the world, the status of wood products certification in the industry is relatively unknown. Therefore, a study was carried out to assess the status of chain of custody certification among wooden furniture manufacturers using a structured questionnaire to interview firms who had participated at the annual Malaysian International Furniture Fair (MIFF). Results collated indicate that the readiness to adopt chain of custody certification among wooden furniture manufacturers was low. The lack of price premiums, limited market potential and high cost was cited as the primary reasons deterring furniture manufacturers from adopting chain of custody certification. Furthermore, the use of plantation wood resources, such as Rubberwood (Hevea brasiliensis), perceived to be certified wood resources, reflects the lack of understanding among the manufacturers. This study shows that an increasing adoption of chain of custody certification among wooden furniture manufacturers in Malaysia can be realized in the market organisation, especially with regards to price premiums and market requirements.
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- 2008
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9. Abnormalities of Vitamin D and Calcium Metabolism after Surgical Treatment of Morbid Obesity: A Study of 136 Patients
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Jacquelyn K Smiertka, George Grunberger, Bruce H MacPherson, Marek Lutrzykowski, Mustafa Hares, Mohammad Amin, Ali Najar, and Ali A. Abbasi
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Adult ,Male ,medicine.medical_specialty ,Endocrinology, Diabetes and Metabolism ,Parathyroid hormone ,chemistry.chemical_element ,Calcium ,Gastroenterology ,Body Mass Index ,Endocrinology ,Bone Density ,Weight loss ,Internal medicine ,Weight Loss ,Vitamin D and neurology ,Humans ,Medicine ,Vitamin D ,Surgical treatment ,Aged ,Bone mineral ,Calcium metabolism ,business.industry ,Phosphorus ,General Medicine ,Middle Aged ,Alkaline Phosphatase ,Obesity, Morbid ,chemistry ,Parathyroid Hormone ,Alkaline phosphatase ,Female ,medicine.symptom ,business - Abstract
To assess the effect of bariatric surgical treatment of morbid obesity on bone mineral metabolism.We analyzed pertinent vitamin D and calcium metabolic variables in 136 patients who had undergone a malabsorptive bariatric operation. Measurements of bone mineral density (BMD), serum 25-hydroxyvitamin D (25-OHD), 1,25-dihydroxyvitamin D [1,25-(OH)2D], parathyroid hormone (PTH), calcium, phosphorus, and alkaline phosphatase were performed. Statistical analyses assessed correlations among various factors.The mean age (+/-SD) of the study group was 48.34 +/- 10.28 years. Their mean weight loss was 114.55 +/- 45.66 lb, and the mean duration since the bariatric surgical procedure was 54.02 +/- 51.88 months. Seventeen patients (12.5%) had a T-score of -2.5 or less, and 54 patients (39.7%) had a T-score between -1.0 and -2.5. Of 119 patients in whom serum 25-OHD was measured, 40 (34%) had severe hypovitaminosis D (25-OHD8ng/mL), and 50 patients (42%) had low hypovitaminosis D (serum 25-OHD 8 to 20 ng/mL). The magnitude of weight loss correlated negatively with serum 25-OHD, calcium, phosphorus, and calcium x phosphorus product values and positively with serum alkaline phosphatase level. Serum 25-OHD and calcium concentrations correlated positively with the BMD. PTH, serum 1,25-(OH)2D, and alkaline phosphatase concentrations correlated negatively with the BMD, a reflection of the presence of secondary hyperparathyroidism, an accelerated conversion of 25-OHD to 1,25-(OH)2D by the elevated PTH levels, and increased osteoblastic activity. The mean daily vitamin D supplementation was 6,472 +/- 9,736 IU.Hypovitaminosis D and subsequent bone loss are common in patients who have undergone a bariatric surgical procedure for morbid obesity. These patients require rigorous vitamin D supplementation.
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- 2007
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10. Patient reports of adverse events associated with acupuncture treatment: a prospective national survey
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H, Macpherson, A, Scullion, K J, Thomas, and S, Walters
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Adult ,Male ,Self Disclosure ,Time Factors ,Leadership and Management ,Incidence ,Health Policy ,Acupuncture Therapy ,Public Health, Environmental and Occupational Health ,Directive Counseling ,Middle Aged ,Patient Acceptance of Health Care ,United Kingdom ,Drug Therapy ,Health Care Surveys ,Humans ,Female ,Original Article ,Prospective Studies ,Safety ,General Nursing ,Quality of Health Care - Abstract
The primary aim was to establish from acupuncture patients the type and frequency of adverse events they experienced and attributed to their treatment. Secondary aims included the measurement of patient reported adverse consequences arising from advice received about conventional/prescribed medication or from delayed conventional diagnosis and treatment.Postal survey of prospectively identified acupuncture patients. One in three members of the British Acupuncture Council (n = 638) invited consecutive patients to participate in the survey. Participating patients gave baseline data and consented to direct follow up by the researchers at 3 months. A structured questionnaire was used to collect data on perceived adverse events.9408 patients gave baseline information and consent and 6348 (67%) completed 3 month questionnaires. Responders were not dissimilar to non-responders for all known characteristics. 682 patients reported at least one adverse event over 3 months, a rate of 107 per 1000 patients (95% CI 100 to 115). Three patients reported a serious adverse event. The most common events reported were severe tiredness and exhaustion, pain at the site of needling, and headache. Patients receiving acupuncture treatment that was not funded by the NHS and patients not in contact with a GP or hospital specialist were less likely to report adverse events (odds ratios 0.59 and 0.66, respectively). 199 (3%) of responding patients reported receiving advice about conventional/prescribed medication, six of whom reported adverse consequences after taking the advice. Two patients reported delayed conventional treatment.Patients report a range of adverse events but these do not prevent most patients seeking further acupuncture. This large scale survey supports existing evidence that acupuncture is a relatively safe intervention when practised by regulated practitioners.
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- 2004
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11. Influence of wood species on the perceived value of wooden furniture: the case of rubberwood
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Jegatheswaran Ratnasingam, Florin Ioras, and Timothy H. Macpherson
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Engineering ,biology ,business.industry ,Success factors ,Forestry ,Pulp and paper industry ,biology.organism_classification ,Agricultural science ,Correlation analysis ,General Materials Science ,Lower cost ,Hevea brasiliensis ,Rubberwood ,business ,Stock (geology) - Abstract
The objective of this study was to evaluate the consumer perceptions towards rubberwood (Hevea brasiliensis) as a premier furniture material. The data for this study were collected from a questionnaire survey completed by 250 buyers who attended the international furniture fairs in Malaysia. Correlation analysis showed that the success factors of rubberwood as a furniture stock in comparison to other furniture wood species are its lower cost, availability, environmental friendliness and easy workability.
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- 2007
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12. NITRIC OXIDE PRODUCTION IN CELLS DERIVED FROM THE HUMAN JOINT
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Peter Grabowski, Stuart H. Ralston, and H. Macpherson
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Cartilage, Articular ,musculoskeletal diseases ,medicine.medical_treatment ,Arginine ,Nitric Oxide ,Dexamethasone ,Chondrocyte ,Rheumatology ,Synovial Fluid ,medicine ,Humans ,Synovial fluid ,Pharmacology (medical) ,Cells, Cultured ,Osteoblasts ,omega-N-Methylarginine ,biology ,Tumor Necrosis Factor-alpha ,business.industry ,Synovial Membrane ,Osteoblast ,Molecular biology ,Nitric oxide synthase ,Drug Combinations ,medicine.anatomical_structure ,Cytokine ,Immunology ,biology.protein ,Cytokines ,Omega-N-Methylarginine ,Joints ,Tumor necrosis factor alpha ,Nitric Oxide Synthase ,Synovial membrane ,business - Abstract
We have investigated the ability of cells derived from the human joint to generate nitric oxide (NO). Synovial fibroblasts, articular chondrocytes and osteoblasts were cultured from tissues of patients undergoing hip replacement surgery, and synovial fluid leucocytes were obtained from patients undergoing joint aspiration. There was little spontaneous generation of NO by any of the cells after culture, but synovial fibroblasts, articular chondrocytes and osteoblasts all produced large quantities of NO in response to a cytokine mix of interleukin (IL)-1 beta + tumour necrosis factor alpha (TNF alpha) + interferon (IFN gamma). Reverse transcription-polymerase chain reaction (RT-PCR) analysis showed the presence of mRNA transcripts for the inducible isoform of NO synthase in cytokine-stimulated but not in unstimulated cells. In contrast, leucocytes from synovial fluid did not produce NO either spontaneously or after cytokine stimulation, and mRNA for inducible NO synthase (iNOS) was not detected in these cells even by nested PCR. There were significant differences in the regulation of NO production between chondrocytes and other cells. Only chondrocytes generated NO in response to IL-1 beta or TNF alpha alone, whereas synovial fibroblasts and osteoblasts required the presence of at least two cytokines to generate NO. Dexamethasone (10(-6)M) had a small but significant inhibitory effect on NO production by chondrocytes, synovial fibroblasts and osteoblasts. Our results indicate that several cells within the human joint have the potential to generate NO in the presence of an appropriate pro-inflammatory cytokine stimulus, while leucocytes in synovial fluid are not a significant source of NO. The data support suggestions that NO is produced within the inflamed joint in diseases such as rheumatoid arthritis.
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- 1996
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13. The effect of temperature on the bacterial load and microbial composition in Norway lobster (Nephrops norvegicus) tail meat during storage
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S G, Gornik, A, Albalat, H, Macpherson, H, Birkbeck, and D M, Neil
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Cold Temperature ,DNA, Bacterial ,Food Storage ,Photobacterium ,RNA, Ribosomal, 16S ,Odorants ,Colony Count, Microbial ,Animals ,Bacterial Load ,Phylogeny ,Nephropidae ,Shellfish - Abstract
The aim of this study was to update and extend our knowledge of the bacterial load and microbial composition in Norway lobster (Nephrops norvegicus) under commercially relevant storage conditions to optimize handling procedures.Total viable counts were performed at different storage temperatures (0, 4, 8, 10, 12 or 16°C) and after different storage times (1-7 days). Storage at 16°C was found to be most detrimental, and storage at 0°C was found to be optimal. 16S-rRNA sequencing was utilized to determine the composition of the bacteria within the microflora. In this way, Photobacterium isolates, especially Photobacterium phosphoreum, were identified as the main specific spoilage organisms. The abilities to reduce trimethylamineoxide (TMAO) and to produce H(2)S were analysed in a selection of bacterial isolates. The higher the incubation temperature during storage, the more isolates were found to reduce TMAO and produce H(2)S.Nephrops norvegicus possesses an unusually high initial microbial load when fresh. Storage temperature is the most crucial factor affecting microbial growth, microbial activity and spoilage potential in N. norvegicus produce. Spoilage can be attributed mainly to P. phosphoreum.This study presents significant new findings with regard to the progression and causative agents of spoilage in N. norvegicus. Based on the results, we can recommend that N. norvegicus tails should be stored in a 0°C environment immediately after catch. Stored this way, the growth and spoilage activity of the microflora may be reduced significantly and an extension of shelf life might be attained.
- Published
- 2011
14. Iron absorption and the duodenal switch operation
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Bruce H MacPherson
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medicine.medical_specialty ,Nutrition and Dietetics ,Iron Overload ,business.industry ,Duodenum ,Endocrinology, Diabetes and Metabolism ,medicine.medical_treatment ,Iron absorption ,Gastroenterology ,Duodenal switch ,Obesity, Morbid ,medicine.anatomical_structure ,Internal medicine ,medicine ,Humans ,Surgery ,business - Published
- 1999
15. Bariatric Surgery Postoperative Behavioral Change: The Importance of Ongoing Assessment and Teaching
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Jacquelyn K Smiertka and Bruce H MacPherson
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medicine.medical_specialty ,Nutrition and Dietetics ,Medical treatment ,business.industry ,Endocrinology, Diabetes and Metabolism ,media_common.quotation_subject ,Physical activity ,Gastrointestinal system ,Surgery ,Wonder ,Morbid obesity ,Quality of life (healthcare) ,Weight loss ,medicine ,Physical therapy ,Quality (business) ,medicine.symptom ,business ,media_common - Abstract
In bariatric surgery we modify, in varying degrees, the gastrointestinal system. We observe the patients clinically over the postoperative period of a few months or more. During this time our main concern is to monitor them physiologically, noting the decline in weight, change in body structure, and vast improvement in their comorbidities. Frequently the reaction of the patient may be somewhat surprising to us. One or 2 years past surgery they have forgotten about having had diabetes and hypertension, diseases for which they had received a barrage of medical treatment. It does not seem to matter anymore that at one time they wore a size 2X and now can wear size 14. Now we are forced to wonder what the expectation of the patient was. Our goal was to improve their physiological and psychological well-being, assuming they would go hand in hand with weight loss. If the patient does not recognize an improvement in their quality of life and continues to question their self-worth, then perhaps we should reassess our goals and our obligations. The principles of surgery and how it is or should be done is fairly clear. If we are to maintain standards of quality in this particular field of medicine, we must recognize our commitment to patients and make these principles just as clear. The commitment involves ongoing postoperative assessment and teaching, assessment of emotional well-being and lessons in dietary and physical activity, including exposure to and involvement in group support.
- Published
- 1995
16. A Comprehensive Analysis of Neoadjuvant Chemotherapy in Breast Cancer: Adverse Events, Clinical Response Rates, and Surgical and Pathological Outcomes—Bozyaka Experience.
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Yılmaz, Cengiz, Zengel, Baha, Üreyen, Orhan, Adıbelli, Zehra Hilal, Taşlı, Funda, Yılmaz, Hasan Taylan, Özdemir, Özlem, Kocatepe Çavdar, Demet, Mollamehmetoğlu, Hülya, Çakıroğlu, Umut, İmren, Yaşar, Yakan, Savaş, and İlhan, Enver
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SENTINEL lymph node biopsy ,BREAST tumors ,PATHOLOGIC complete response ,AXILLARY lymph node dissection ,DRUG therapy ,RETROSPECTIVE studies ,CANCER chemotherapy ,COMBINED modality therapy ,MEDICAL records ,ACQUISITION of data ,ANTHRACYCLINES ,CARDIOTOXICITY ,MASTECTOMY ,DISEASE progression ,LUMPECTOMY - Abstract
Simple Summary: This study aimed to evaluate and analyze the neoadjuvant chemotherapy (NACTx) processes and surgical and pathological outcomes in breast cancer (BC). NACTx for BC caused grade ≥ 3 adverse events in one-fifth of the patients in our study. Anthracyline cardiotoxicity (2.2%) resulted in one death (0.4%). Clinical disease progression occurred in 3.9% of the cases (14% in triple-negative BC). Cavity shaving was required in one-fifth of the patients. We found that invasive lobular carcinoma (ILC) and tumors with low SUVmax values are very risky for positive surgical margins. Axillary clinical complete response is not reliable for luminal A (LA) BC and ILC, but trustworthy for HER2-enriched and triple-negative BC. It was also found that the need for ALND decreases with HER2(+) disease and higher SUVMax values of axillary lymph nodes, but increases with ER positivity and higher PR expression levels. A pathologic complete response is unlikely in well-defined LA BC. Objectives: To evaluate the neoadjuvant chemotherapy (NACTx) process in breast cancer (BC), its significant treatment-related adverse events (trAEs), tumor clinical response rates, and surgical and pathological outcomes, and to analyze factors influencing cavity shaving and axillary lymph node dissection (ALND) following sentinel lymph node biopsy (SLNB). Methods: A comprehensive retrospective study was conducted at a single center on patients who received NACTx for BC between 2015 and 2021. Results: Medical records of 242 patients were reviewed. Approximately one-fifth encountered grade ≥ 3 trAEs (21.5%), leading 3.3% to discontinue chemotherapy. Anthracycline cardiotoxicity (2.2%) caused one death (mortality rate = 0.4%). For clinical response and surgical and pathological outcomes, 229 patients were eligible. Clinical progression occurred in 3.9% of the patients (14% in triple-negative BC, p = 0.004). Breast-conserving surgery (BCS) was performed in 55% of the patients. There was no significant difference between the type of breast surgery (BCS vs. mastectomy) and molecular subtype, histology, tumor size, or tumor's pathological response degree. Cavity shaving was required in one-fifth of the patients who underwent BCS (n = 134) due to an invasive tumor at the surgical margin (SM). Tumor histology (invasive ductal vs. invasive lobular carcinoma; OR: 4.962, 95% CI 1.007–24.441, p = 0.049) and tumor SUVMax value (OR: 0.866, 95% CI 0.755–0.993, p = 0.039) had significant independent efficacy on SM positivity. Initially, 75% underwent SLNB, but nearly half of them needed ALND. ALND rates were significantly higher in the luminal A and LB-HER2(−) groups (87% vs. 69%) than in the HER2(+) and TN groups (43% to 50%) (p = 0.001). All luminal A patients and those with lobular histology required ALND after SLNB, but no patients in the HER2-enriched group required ALND. ER positivity and higher PR expression levels were associated with an increased need for ALND after SLNB, whereas HER2 positivity and higher SUVMax values of LN(s) were associated with a significantly reduced need for ALND. About 27% of the patients achieved overall pCR. No pCR was achieved in the LA group. Conclusions: The BC NACTx process requires close monitoring due to severe AEs and disease progression. NACTx decisions must be made on experienced multidisciplinary tumor boards, considering tumor characteristics and expected targets. [ABSTRACT FROM AUTHOR]
- Published
- 2025
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17. A Novel Methodology for Engaging Complex Therapeutic Landscapes and Health Care Performances: "Theatricality".
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Croke, Sarah and Freshwater, Dawn
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INTEGRATIVE medicine ,RESEARCH personnel ,MEDICAL care ,MEDICAL centers ,ETHNOLOGY - Abstract
Complex health care interventions often consist of specific and non-specific effects and can present a methodological and intellectual challenge to researchers. This is especially the case in Complementary and Integrative Medicines (CIM), where research may inadequately capture the holistic nature of therapies, affecting the quality of outcomes and evidence reported. This article introduces a novel approach that advances methodology and helps researchers to "step inside" the therapeutic drama, to improve the quality of evidence produced. The method, termed Theatricality, was trialed in five complementary health centers across four European countries and provides a fresh view of therapy, where the interventions, practitioners, and researchers appear bound by their context and space, creating, or limiting the potential for these acts. Delivered as an adjunct to Ethnography, this approach offers a new way of conceiving, capturing, and communicating whole health care performances that may help to improve the quality of evidence in complex health care interventions. [ABSTRACT FROM AUTHOR]
- Published
- 2025
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18. Global Impact of Aging on the Hemodynamic Response Function in the Gray Matter of Human Cerebral Cortex.
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Fesharaki, Nooshin J., Taylor, Amanda, Mosby, Keisjon, Li, Ruosha, Kim, Jung Hwan, and Ress, David
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FUNCTIONAL magnetic resonance imaging ,COGNITIVE aging ,GRAY matter (Nerve tissue) ,AGE distribution ,CEREBRAL cortex - Abstract
In functional magnetic resonance imaging, the hemodynamic response function (HRF) is a stereotypical response to local changes in cerebral hemodynamics and oxygen metabolism due to briefly (< 4 s) evoked neural activity. Accordingly, the HRF is often used as an impulse response with the assumption of linearity in data analysis. In cognitive aging studies, it has been very common to interpret differences in brain activation as age‐related changes in neural activity. Contrary to this assumption, however, evidence has accrued that normal aging may also significantly affect the vasculature, thereby affecting cerebral hemodynamics and metabolism, confounding interpretation of fMRI cognitive aging studies. In this study, use was made of a multisensory task to evoke the HRF in ~87% of cerebral cortex in cognitively intact adults with ages ranging from 22 to 75 years. This widespread activation enabled us to investigate age trends in the spatial distributions of HRF characteristics within the majority of cortical gray matter, which we termed as global age trends. The task evoked both positive and negative HRFs, which were characterized using model‐free parameters in native‐space coordinates. We found significant global age trends in the distributions of HRF parameters in terms of both amplitudes (e.g., peak amplitude and contrast‐to‐noise ratio) and temporal dynamics (e.g., full‐width‐at‐half‐maximum). Our findings offer insight into how age‐dependent changes affect neurovascular coupling and show promise for use of HRF parameters as non‐invasive indicators for age‐related pathology. [ABSTRACT FROM AUTHOR]
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- 2024
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19. Legal pathways for China's blue carbon conservation: a perspective of synergizing ocean and climate rule of law.
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Li, Haitang and Liu, Yu
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GREENHOUSE gas mitigation ,CLIMATE change mitigation ,ENVIRONMENTAL protection ,CARBON cycle ,CARBON credits ,CARBON offsetting - Abstract
Blue carbon serves as a significant natural carbon sink and presents substantial opportunities for greenhouse gas mitigation actions. This study first elucidates the importance of blue carbon conservation and its basis in international law, and then analyzes the progress and shortcomings of China's efforts in blue carbon protection in the areas of legislation, enforcement, and judicial practices related to ocean governance and climate change mitigation. Finally, from the perspective of coordinating ocean and climate governance, this paper proposes legal pathways to improve blue carbon conservation. In terms of legislation, it advocates for the explicit inclusion of the legal concept of "blue carbon" in the legal frameworks governing ocean and climate governance, and for the clarification of the legal status of "blue carbon credits". In terms of regulatory enforcement, it recommends developing a detailed implementation plan to integrate blue carbon into the China Certified Emission Reduction (CCER) system, designating a regulatory body for blue carbon trading, and establishing a multi-stakeholder governance mechanism involving government, market, and society. In the judicial realm, the paper suggests issuing judicial interpretations to clarify the scope, prerequisites, and implementation of "purchasing blue carbon credit" to prevent such purchases from becoming a "free pass" that could damage marine ecosystems [ABSTRACT FROM AUTHOR]
- Published
- 2024
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20. Omnigene-Guttm ensures fecal microbiome stability in the pediatric population.
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Hoogendijk, Raoull, van den Broek, Thijs J. M., Lee, Hyunju, Mueller, Sabine, Kline, Cassie, Bianco, John, Top, Janetta, de Zoete, Marcel R., Kester, Lennart, Calkoen, Friso, and van der Lugt, Jasper
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CLINICAL trials ,MICROBIAL communities ,CANCER prognosis ,ADULTS ,RIBOSOMAL RNA ,GUT microbiome - Abstract
Increasing evidence exists that the gut microbiome influences toxicity as well as outcomes in a variety of cancers. To investigate the role of the gut microbiome in pediatric neuro-oncology, microbiome analysis has been included in multiple prospective pediatric neuro-oncology clinical trials (NCT05009992, NCT04732065, NCT04775485). In these trials, the OMNIgene-GUT
tm preservation tubes are used for the collection of the feces. OMNIgene-GUTtm has demonstrated reliability in preserving the composition of the gut microbiome in adults; however, its validation for use in the pediatric population remains limited. Therefore, we compared the quality of the DNA by 16S rRNA gene sequencing after various methods of stabilizing fecal samples in pediatric populations, from the direct freeze method at − 80 °C to preserving samples with OMNIgene-GUTtm at room temperature for various durations. Our results showed that there were no statistically significant differences between the alpha-diversity, and beta-diversity. However, pairwise differential abundance analyses demonstrated that OMNIgene-GUT™ is superior in maintaining microbial community structure compared to storing samples without any preservation method. With the OMNIgene-GUTtm 's stabilization of the fecal samples being superior and its ease-of-use benefits, it proves to be a valid and ideal method of stabilizing fecal samples for current and future pediatric clinical trials. [ABSTRACT FROM AUTHOR]- Published
- 2024
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21. The Weideshan Batholith and Felsic Dykes in the Eastern Jiaodong Peninsula: Is There Any Possible Relation to Gold Mineralization?
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Dong, Leilei and Tian, Zhonghua
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OXIDATION states ,FELSIC rocks ,BATHOLITHS ,MINERALIZATION ,MINERALS - Abstract
The genetic link between Weideshan-type rocks and gold mineralization in the Jiaodong Peninsula remains unclear. In this study, we examined the geochemical characteristics, water content, and oxidation states of Weideshan-type rocks and associated felsic dykes to assess the potential of a Weideshan-type batholith in directly contributing the fluids responsible for extensive gold mineralization. The findings reveal that the emplacement timing of Weideshan-type magmatic rocks in the Jiaodong Peninsula is slightly different from the timing of gold mineralization. Additionally, high zircon Eu/Eu* values indicate a relatively high water content within the Weideshan batholith. However, due to limited data on crystallization pressures, it remains equivocal whether water was saturated during the emplacement of the Weideshan batholith. Even if fluid saturation did occur, the magmatic oxidation states of Weideshan-type rocks are notably high (>FMQ + 1.5), which is incompatible with the reduced mineral assemblages typical of Jiaodong gold deposits. Therefore, our study suggests that the genetic link between gold mineralization and Weideshan-period granitic magmatism may be weak. [ABSTRACT FROM AUTHOR]
- Published
- 2024
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22. Mechanisms of fluid degassing in shallow magma chambers control the formation of porphyry deposits.
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Wang, Zixuan, Zheng, Yuanchuan, Xu, Bo, Hou, Zengqian, Shen, Yang, Zhang, Aiping, Wang, Lu, Wu, Changda, and Guo, Qingfeng
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MINERAL analysis ,PLAGIOCLASE ,MAGMAS ,PORPHYRY ,AMPHIBOLES - Abstract
Magmatic fluid degassing within shallow magma chambers underneath the ore bodies is critical to the formation of porphyry Cu-Au deposits (PCDs). Yet, it remains unclear how the fluid degassing influences the development of PCDs. Here, geochemical data of apatite, amphibole, and plagioclase from ore-bearing and coeval barren porphyries have been analyzed in Sanjiang metallogenic belt, China. The ore-bearing porphyries normally exhibit high and wide X
F /XCl (31.76–548.12) and XF /XOH (0.779–7.370) ratios of apatites, which are evidently higher than those of the barren porphyries (XF /XCl of 1.03–26.58; XF /XOH of 0.686–3.602). Combined with the continuous variation features of Cl/OH ratios and H2 O contents of melts calculated by amphiboles, as well as fluid migration models, we constrained the mechanisms of fluid degassing within shallow magma chambers underneath PCDs. There are three different ways of fluid degassing, while only fluid degassing via fluid channel stage can migrate and focus the metal-rich fluids effectively, conducive to the development of PCDs. The mechanisms of magmatic fluid degassing processes are further controlled by the storage depths of magma chambers and initial H2 O contents of the magmas revealed by the compositions of amphibole, plagioclase, and thermodynamic modeling. Magmas with shallower storage depths and higher initial H2 O contents are more likely to experience extensive and focused fluid degassing, leading to the generation of PCDs. This study demonstrates the potential utility of integrated mineral analyses and thermodynamic modeling for investigating the mechanisms of magmatic fluid degassing in porphyry systems, as well as for identifying prospective buried PCDs. [ABSTRACT FROM AUTHOR]- Published
- 2024
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23. Parallels Between Cupping in Traditional Chinese Medicine and Ventosas in Native American Cultures.
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Paz, Adonai, Yasin, Hasan, and Mathis, Samuel
- Published
- 2024
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24. A Description of Suspected Concussions in Football-Related Activities among K-12 Students in Utah.
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Waltzman, Dana, Sarmiento, Kelly, Ferrell, Deanna, Kern, Vanonda, and Roghaar, Chloe
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BRAIN concussion prevention ,RISK assessment ,NURSES ,SAFETY ,OCCUPATIONAL roles ,DATA analysis ,HIGH school students ,PAIRED comparisons (Mathematics) ,CHI-squared test ,DESCRIPTIVE statistics ,FOOTBALL injuries ,MIDDLE school students ,SCHOOL children ,SCHOOL nursing ,STATISTICS ,DATA analysis software ,BRAIN concussion ,DISEASE risk factors ,CHILDREN - Abstract
The circumstances and nature of concussions among youth who play tackle, flag, or touch football are not well understood. This study used data from Utah's Student Injury Reporting System (SIRS) to explore suspected concussions among K-12 students sustained during participation in football-related activities (tackle, flag, or touch football). Descriptive statistics and chi-square analyses showed that 54.7% of suspected concussions due to football-related activity were among elementary and middle school and 41.3% were among high school students. Most suspected concussions resulted from being struck by or against something (81.9%) and occurred during school-sanctioned games and practices (37.9%), lunch, lunch recess, and recess (34.8%), or physical education class (22.7%). The type of school activity and context for suspected concussions varied by school level. School nurses and others in Utah may use study findings to customize concussion prevention efforts by school level and activity. [ABSTRACT FROM AUTHOR]
- Published
- 2024
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25. An Association Rule Mining-Based Modeling Framework for Characterizing Urban Road Traffic Accidents.
- Author
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Du, Lijing, Huang, Fasheng, Lu, Hua, Chen, Sijing, and Guo, Qianwen
- Abstract
The World Health Organization has recognized road traffic accidents as a global crisis, particularly in urban environments. Despite extensive research endeavors, significant gaps remain in our understanding of how various factors interact to influence urban road traffic incidents. This study analyzed data from 4285 urban road traffic accidents in Hubei Province, employing a two-step clustering algorithm to classify accidents into distinct groups based on specific conditions. Subsequently, association rule mining was utilized to discern relationships between accident characteristics within each cluster. Additionally, a classification based on the association rule algorithm was implemented to develop a predictive model for analyzing factors contributing to casualties. The data were categorized into clusters based on weather and road conditions, with separate discussions conducted for each scenario. The findings indicated that urban congestion is the most critical factor contributing to accidents. Interestingly, rather than in severe weather, accidents were more prevalent during cloudy, light-rain conditions. Electric vehicles and motorcycles emerged as the most vulnerable groups. Furthermore, a notable interaction was observed between the day of the week, time of day, and weather conditions. The predictive model achieved an impressive average accuracy of 86.9%. This methodology facilitates the identification of contributing factors and mechanisms underlying urban road traffic accidents in China and holds potential for establishing accident analysis models in similar contexts. The interactive visualization of association rules further enhances the applicability of the findings. The findings of this study can provide valuable insights for traffic management authorities to understand the causes of urban road traffic accidents, assisting them in devising effective policy measures and countermeasures to reduce the occurrence of accidents and casualties. [ABSTRACT FROM AUTHOR]
- Published
- 2024
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26. African ancestry neurodegeneration risk variant disrupts an intronic branchpoint in GBA1
- Author
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Álvarez Jerez, Pilar, Wild Crea, Peter, Ramos, Daniel M., Gustavsson, Emil K., Radefeldt, Mandy, Damianov, Andrey, Makarious, Mary B., Ojo, Oluwadamilola O., Billingsley, Kimberley J., Malik, Laksh, Daida, Kensuke, Bromberek, Sarah, Hu, Fangle, Schneider, Zachary, Surapaneni, Aditya L., Stadler, Julia, Rizig, Mie, Morris, Huw R., Pantazis, Caroline B., Leonard, Hampton L., Screven, Laurel, Qi, Yue A., Nalls, Mike A., Bandres-Ciga, Sara, Hardy, John, Houlden, Henry, Eng, Celeste, Burchard, Esteban González, Kachuri, Linda, Lin, Chia-Ho, Black, Douglas L., Singleton, Andrew B., Fischer, Steffen, Bauer, Peter, Reed, Xylena, Ryten, Mina, Beetz, Christian, Ward, Michael, Okubadejo, Njideka U., and Blauwendraat, Cornelis
- Published
- 2024
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27. The Analytic Profile System (APS) for Evaluating Visual Displays
- Author
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Douglas H. Macpherson, M. A. Fischl, and Arthur I. Siegel
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Behavioral Neuroscience ,Computer science ,Human Factors and Ergonomics ,Applied Psychology - Abstract
A display evaluative tool called the “Analytic Profile System” (APS) was developed and tested. The scorable factors included in the APS are based on the results of a multidimensional scaling of the display-observer interface. The technique itself rests on forced-choice methods and is held to possess acceptable psychometric characteristics.
- Published
- 1975
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28. Terrestrial
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A. H. MacPherson
- Subjects
General Agricultural and Biological Sciences - Published
- 1964
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29. Pack dogs in the Canadian Arctic
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T. H. Manning and A. H. Macpherson
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Fishery ,Geography ,Ecology ,Arctic ,Geography, Planning and Development ,General Earth and Planetary Sciences - Abstract
Before the Eskimo economy had been much affected by the advent of whites, pack dogs were a common means of summer transport in most if not all parts of the Canadian Arctic. Among the changes which have led to less inland movement in summer are the attraction of settlements at “ship time”, the increase in bulk and weight of the average Eskimo family's personal effects, the increased reliance on bought food, the advent of boats and modern weapons, and the decline of the mainland caribou. Also, the availability of steel-shod dog sledges and the increased size of dog teams have, in some areas, made it more convenient to use a sledge in summer than to use pack dogs. However, sledge travel is not suitable for a small party of whites on a single summer trip, as a large team is needed and sufficient dogs and dog food may be difficult to obtain. We have found the use of pack dogs both convenient and economical, particularly for reconnaissance work, where freedom to spend varying amounts of time in any place along the route is a requisite. The reduction of weight of one's personal pack increases the pleasure of travelling and facilitates work along the way. We have used from one to four dogs, depending on their availability and upon the amount of dog food which can be obtained before starting and en route. Five is probably the maximum number of pack dogs that a man travelling alone would want to look after, as loading in the morning and adjusting packs during the day are time-consuming tasks.
- Published
- 1961
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30. Grizzly Bear in Danger
- Author
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A. H. Macpherson
- Subjects
Geography ,Ecology, Evolution, Behavior and Systematics ,Nature and Landscape Conservation - Abstract
From 1949 to 1960 the barren-ground grizzly bear was totally protected in the Northwest Territories of Canada, with the result that numbers increased and so did their range. But pressure from trappers led in 1960 to an amendment legalising die killing of grizzlies in defence of life or property, and in 1964, despite the views of wildlife biologists and organisations, another amendment deprived the bears of all protection from licensed native hunters. The author, who is Research Supervisor of the Eastern Region, Canadian Wildlife Service, and has visited the Canadian Arctic almost every year since 1949, points out that the grizzly bear population there is now so low that a relatively small amount of hunting could reduce the breeding population and lead to the extinction of this magnificent animal.
- Published
- 1966
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31. An ac Operated Portable Electrometer‐Type Millivoltmeter
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Cullen H. Macpherson and Otto H. Schmitt
- Subjects
Materials science ,Potentiometer (measuring instrument) ,business.industry ,Electrical engineering ,Volt ,Electrometer ,business ,Instrumentation ,Sensitivity (electronics) - Abstract
A stable line‐powered dc millivoltmeter is described which combines the advantages of a directly calibrated scale with the long‐range accuracy of a precision potentiometer. Fractional millimicroampere current drain and a full‐range scale of ±1 volt with 1‐millivolt sensitivity at all settings makes the instrument unusually useful for biophysical, electrochemical, and physical measurements.
- Published
- 1954
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32. Adherence to the Mediterranean diet is associated with reduced chronic pancreatitis risk: a longitudinal cohort study.
- Author
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Zhou, Chunhua, Geng, Jiawei, Huang, Hanyi, Dan, Lintao, Wu, Zhipeng, Ruan, Xixian, Zhang, Yao, Chen, Jie, Sun, Jing, and Zou, Duowu
- Published
- 2024
- Full Text
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33. Differential Effect of TRPV1 Modulators on Neural and Behavioral Responses to Taste Stimuli.
- Author
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Rhyu, Mee-Ra, Ozdener, Mehmet Hakan, and Lyall, Vijay
- Abstract
In our diet, we ingest a variety of compounds that are TRPV1 modulators. It is important to understand if these compounds alter neural and behavioral responses to taste stimuli representing all taste qualities. Here, we will summarize the effects of capsaicin, resiniferatoxin, cetylpyridinium chloride, ethanol, nicotine, N-geranyl cyclopropylcarboxamide, Kokumi taste peptides, pH, and temperature on neural and behavioral responses to taste stimuli in rodent models and on human taste perception. The above TRPV1 agonists produced characteristic biphasic effects on chorda tympani taste nerve responses to NaCl in the presence of amiloride, an epithelial Na
+ channel blocker, at low concentrations enhancing and at high concentrations inhibiting the response. Biphasic responses were also observed with KCl, NH4 Cl, and CaCl2 . In the presence of multiple stimuli, the effect is additive. These responses are blocked by TRPV1 antagonists and are not observed in TRPV1 knockout mice. Some TRPV1 modulators also increase neural responses to glutamate but at concentrations much above the concentrations that enhance salt responses. These modulators also alter human salt and glutamate taste perceptions at different concentration ranges. Glutamate responses are TRPV1-independent. Sweet and bitter responses are TRPV1-independent but the off-taste of sweeteners is TRPV1-dependent. Aversive responses to acids and ethanol are absent in animals in which both the taste system and the TRPV1-trigeminal system are eliminated. Thus, TRPV1 modulators differentially alter responses to taste stimuli. [ABSTRACT FROM AUTHOR]- Published
- 2024
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34. Specific vegetable types are associated with lower long-term risk for late-life dementia: the Perth Longitudinal Study of Aging Women.
- Author
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Ghasemifard, Negar, Radavelli-Bagatini, Simone, Laws, Simon M., Macpherson, Helen, Stevenson, Emma, Hodgson, Jonathan M., Prince, Richard L., Lewis, Joshua R., and Sim, Marc
- Published
- 2024
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35. Petrogenesis of Granitoids from the Waxing Mo Polymetallic Deposit, NE China: Implications for Magma Fertility and Mineralization.
- Author
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Liu, Yang, Sun, De-You, Gao, Yang, Wang, Hong-Chao, Ma, Yu-Xin, Xu, Jun, and Liu, Xin-Tong
- Subjects
GEOCHEMISTRY ,PORPHYRY ,CONTINENTAL crust ,GRANODIORITE ,COPPER ,APATITE - Abstract
The Waxing Mo polymetallic deposit is located in the central part of the Lesser Xing'an–Zhangguangcai Range (LXZR), NE China. The Mo (Cu) mineralization in the deposit is dominantly hosted by quartz veinlets and stockworks and is closely related to silicification and potassic alteration, while the W mineralization is most closely related to greisenization. Zircon samples from granodiorite, biotite monzogranite, granodiorite porphyry, and syenogranite in the Waxing deposit yielded U-Pb ages of 172.3 Ma, 172.8 Ma, 173.0 Ma, and 171.4 Ma, respectively. Six molybdenite samples from porphyry Mo ores yielded a Re-Os isochron age of 172.0 ± 1.1 Ma. The granitoids in the ore district are relatively high in total alkali (Na
2 O + K2 O), are metaluminous to weakly peraluminous, and are classified as I-type granitoids. The zircon samples from all granitoids showed a relatively consistent Hf isotopic composition, as shown by positive εHf (t) values (3.1–8.3) and young TDM2 ages (0.69–1.25 Ga). These results, combined with the whole-rock geochemistry, suggest that the magma source of these rocks most likely derived from partial melting of a juvenile middle-lower continental crust, with a minor contribution from the mantle. These granitoids have compositional characteristics of adakites such as relatively high Sr contents (e.g., >400 ppm) and Sr/Y ratios (e.g., >33), as well as weak Eu anomalies (e.g., Eu/Eu* = 0.8–1.1), indicating extensive fractionation crystallization of a hydrous magma. The apatite geochemistry indicates that the ore-related magma in Waxing is F-rich and has a relatively low content of sulfur. The zircon geochemistry reveals that the granodiorite, biotite monzogranite, and granodiorite porphyry have relatively high oxygen fugacity (i.e., ΔFMQ = +1.1~1.3), whereas the fO2 values of the granite porphyry and syenogranite are relatively low (i.e., ΔFMQ = +0.1~0.5). The whole-rock and mineral geochemistry suggest that the Mo mineralization in Waxing is probably genetically related to granitoids (i.e., granodiorite, biotite monzogranite, and granodiorite porphyry), with higher oxygen fugacity and a high water content, whereas the magmatic S concentration is not the key factor controlling the mineralization. A comparison of the geochemical compositions of ore-forming and barren stocks for porphyry Mo deposits in the LXZR showed that geochemical ratios, including Eu/Eu* (>0.8), 10,000*(Eu/Eu*)/Y (>600), Sr/Y (>33), and V/Sc (>8), could be effective indicators in discriminating fertile granitoids for porphyry Mo deposits from barren ones in the region. [ABSTRACT FROM AUTHOR]- Published
- 2024
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- View/download PDF
36. Mineralogical constraints on magma storage conditions in ultramafic arc cumulates and the nature and role of cryptic fugitive melts: Tulameen Alaskan-type intrusion, North American Cordillera.
- Author
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Nixon, Graham T., Manor, Matthew J., Scoates, James S., Spence, Dylan W., and Milidragovic, Dejan
- Subjects
ORTHOPYROXENE ,PERITECTIC reactions ,PLAGIOCLASE ,WATER temperature ,AMPHIBOLES - Abstract
Alaskan-type ultramafic–mafic intrusions in convergent-margin settings provide valuable information on melt-cumulate petrogenetic processes operating at depth in the sub-arc crust. Here, we report the compositions and textural relationships of cumulus and postcumulus minerals in a suite of clinopyroxenites and hornblendites from the peripheral zone of the Tulameen Alaskan-type intrusion in British Columbia, Canada. Mineral chemistry is used to establish magma storage conditions (P, T, fO
2 , H2 Omelt ) and to reconstruct the composition of cryptic residual liquids that equilibrated with the mineral phases and subsequently escaped the local mush system. Residual liquids in equilibrium with clinopyroxene (diopside) are metaluminous calc-alkaline basalt to andesite; melts equilibrated with amphibole (magnesio-hastingsite) are metaluminous to peraluminous calc-alkaline dacite to low-silica rhyolite. Thermobarometry yields a robust estimate of storage pressure of 400 ± 50 MPa (~ 15 km paleodepth) for the Tulameen magma reservoir and equilibration temperatures of 1130–960 °C for clinopyroxene and 950–850 °C for amphibole. The large cooling interval between the early crystallization of clinopyroxene and late appearance and continued crystallization of peritectic amphibole facilitated progressive extraction of residual liquids from clinopyroxene-rich cumulates, consistent with textural relationships, mass balance calculations and experimental petrology. Peritectic dacitic melts are hydrous (~ 6–8.3 wt% H2 Omelt ), oxidized (fO2 ~ NNO + 1.6 to NNO + 3.6 log units) and buoyantly mobile with low density (~ 2200 kg/m3 ) and viscosity (~ 103 poise). Lower water contents likely reflect degassing of peritectic melts driven by amphibole crystallization; relatively high redox conditions are attributed to precursor fractionation of olivine and clinopyroxene preserved as cumulates in the core of the Tulameen intrusion. Peritectic amphibole crystallized in response to migration of a thermally buffered reaction front marking the stability limit of amphibole (≤ 950 °C) and driven by near-isobaric cooling. Pervasive infiltration of reactive dacitic liquids through the clinopyroxene mush formed intergranular/poikilitic amphibole and channelized flow was captured in part by cm-scale hornblendite segregations; aggregated melts formed in situ bodies of replacive hornblendite. The absence of orthopyroxene and rarity of plagioclase in the evolved ultramafic cumulates of Alaskan-type intrusions and similar arc-related rocks is attributed primarily to high H2 Omelt and oxygen fugacity in differentiated arc magmas. [ABSTRACT FROM AUTHOR]- Published
- 2024
- Full Text
- View/download PDF
37. The modular approach to therapy for youths with anxiety, depression, trauma, and conduct problems (MATCH): results from the Norwegian randomized-controlled trial.
- Author
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Hukkelberg, Silje S., Torsheim, Torbjørn, Nordahl, Kristin Berg, Bringedal, Görel E., Rajah, Sivarajan, Hagen, Kristine Amlund, Kjøbli, John, Rognstad, Kristian, Ugueto, Ana M., Bearman, Sarah Kate, and Weisz, John
- Subjects
INTERNALIZING behavior ,PSYCHIATRIC clinics ,RANDOMIZED controlled trials ,TREATMENT effectiveness ,ANXIETY - Abstract
Background: A randomized controlled trial was conducted to examine the effectiveness of the Modular Approach to Therapy for Youths with Anxiety, Depression, Trauma, and Conduct Problems (MATCH) for Norwegian youths referred to seven Child and Adolescent Psychiatric Outpatient Clinics. MATCH addresses comorbid problems that are common in children and youth, and its transdiagnostic design may therefore be more effective compared to standard treatments that often address single problems. MATCH has, however, never been evaluated in a Nordic context, and the present study aimed to fill this gap. Methods: A sample of 121 Norwegian youths (M
age = 9.83, 58.7% boys) was randomly assigned to MATCH (n = 73) or treatment as usual (TAU, n = 48). Primary treatment outcomes were youths' externalizing and internalizing problems as reported by parents, using the Child Behavior Checklist, the Behavior and Feelings Survey. In addition, the study included assessments of parent-reported Top Problems. Results: Overall, youths showed significant improvements in both externalizing and internalizing problems from intake to post-test. Results did not provide evidence that MATCH reduces symptoms of these problems compared to TAU. Conclusions: The findings were inconclusive regarding whether MATCH was more effective than TAU in reducing youth internalizing and externalizing problems. Trial Registration Identifier: ISRCTN24029895. Registration date: 8/8/2016. [ABSTRACT FROM AUTHOR]- Published
- 2024
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38. Decline of Affective Prosody Recognition With a Positivity Bias Among Older Adults: A Systematic Review and Meta-Analysis.
- Author
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Xinran Fan, Enze Tang, Minyue Zhang, Yi Lin, Hongwei Ding, and Yang Zhang
- Subjects
RECOGNITION (Psychology) ,STATISTICAL power analysis ,PROMPTS (Psychology) ,T-test (Statistics) ,RESEARCH funding ,EMOTIONS ,META-analysis ,DESCRIPTIVE statistics ,AGE distribution ,PHYSIOLOGICAL aspects of speech ,SYSTEMATIC reviews ,MEDLINE ,ONLINE information services ,DATA analysis software ,CONFIDENCE intervals ,QUALITY assurance ,COGNITIVE aging ,PSYCHOLOGY information storage & retrieval systems ,OLD age - Abstract
Purpose: Understanding how older adults perceive and interpret emotional cues in speech prosody contributes to our knowledge of cognitive aging. This study provides a systematic review with meta-analysis to investigate the extent of the decline in affective prosody recognition (APR) among older adults in terms of overall and emotion-specific performance and explore potential moderators that may cause between-studies heterogeneity. Method: The literature search encompassed five electronic databases, with a specific emphasis on studies comparing the APR performance of older adults with that of younger adults. This comparison was focused on basic emotions. Meta-regression analyses were executed to pinpoint potential moderators related to demographic and methodological characteristics. Results: A total of 19 studies were included in the meta-analysis, involving 560 older adults with a mean age of 69.15 years and 751 younger adults with a mean age of 23.02 years. The findings indicated a substantial negative effect size (g = -1.21). Furthermore, the magnitude of aggregated effect sizes showed a distinct valence-related recognition pattern with positive prosody exhibiting smaller effect sizes. Language background and years of education were found to moderate the overall and emotion-specific (i.e., disgust and surprise) performance effect estimate, and age and gender significantly influenced the effect estimate of happiness. Conclusions: The results confirmed a significant decline in APR ability among older adults compared to younger adults, but this decline was unbalanced across basic emotions. Language background and educational level emerged as significant factors influencing older adults' APR ability. Moreover, participants with a higher mean age exhibited notably poorer performance in recognizing happy prosody. These findings underscore the need to further investigate the neurobiological mechanisms for APR decline associated with aging. [ABSTRACT FROM AUTHOR]
- Published
- 2024
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39. The Petrogenesis and Geological Implications of the Sanggeda Gabbros, Southern Tibet: Insights from the Amphibole Crystal Population.
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Jiang, Xiumin, Luo, Zhaohua, and Liu, Xiao
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IGNEOUS rocks ,VOLCANIC ash, tuff, etc. ,PHENOCRYSTS ,CONTINENTAL crust ,AMPHIBOLES - Abstract
Amphibole is an important mineral during the differentiation of arc magmas but rarely as a phenocryst in arc lavas or eruptive pyroclastic rocks. The Sanggeda complex, intruded into the ophiolite of the Indus–Yarlung Zangbo Suture Zone (IYZSZ), Zedong, southern Tibet, mainly consists of amphibole-rich, fine-grained, and porphyritic gabbros. The complex provides an opportunity to study the differentiation of arc magmas through amphibole crystals. Four distinct amphibole crystal populations can be recognized according to petrographic observations, EMPA, and LA–ICP–MS analysis. The first ones (Type 1) are fined-grained and euhedral, are crystallized during ascent, and are the product of the shallow emplacement of host magma. The second ones (Type 2) are euhedral, with slight negative Eu and Sr anomalies, and crystallize from an evolved magma that previously experienced plagioclase fractionation. Type 3 amphiboles have similar morphological characteristics to Type 2 but are without Eu and Sr anomalies. Type 4 crystals are shown as pseudomorphs, formed by the reaction–replacement between the clinopyroxene and melt. Type 1 crystals are autocrysts. Other amphiboles within host magma, whether presented as phenocrysts or cumulate nodules, are antecrysts. Based on the amphibole crystal population developed in the complex, in this study, a trans-crustal magma plumbing system is proposed, containing at least three magma reservoirs located at different crust depths: the shallow emplaced crust (~4.8 km), the mid-crust (~12.9 km), and the lower crust (~21.8–24.9 km). Early amphibole crystallization is an effective process to generate silicic residual melts. Gravity could help in that sense. Precursor amphibole and clinopyroxene can efficiently delaminate back into the mantle and promote the generation of silicic continental crust. [ABSTRACT FROM AUTHOR]
- Published
- 2024
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40. Application of Machine Learning to Characterize Metallogenic Potential Based on Trace Elements of Zircon: A Case Study of the Tethyan Domain.
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Guo, Jin and He, Wen-Yan
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ARTIFICIAL neural networks ,INFORMATION technology ,ARTIFICIAL intelligence ,PROSPECTING ,RANDOM forest algorithms - Abstract
Amidst the rapid advancement of artificial intelligence and information technology, the emergence of big data and machine learning provides a new research paradigm for mineral exploration. Focusing on the Tethyan metallogenic domain, this paper conducted a series of research works based on machine learning methods to explore the critical geochemical element signals that affect the metallogenic potential of porphyry deposits and reveal the metallogenic regularity. Binary classifiers based on random forest, XGBoost, and deep neural network are established to distinguish zircon fertility, and these machine learning methods achieve higher accuracy, exceeding 90%, compared with the traditional geochemical methods. Based on the random forest and SHapley Additive exPlanations (SHAP) algorithms, key chemical element characteristics conducive to magmatic mineralization are revealed. In addition, a deposit classification model was constructed, and the t-SNE method was used to visualize the differences in zircon trace element characteristics between porphyry deposits of different mineralization types. The study highlights the promise of machine learning algorithms in metallogenic potential assessment and mineral exploration by comparing them with traditional chemical methods, providing insights into future mineral classification models utilizing sub-mineral geochemical data. [ABSTRACT FROM AUTHOR]
- Published
- 2024
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41. A Piezoelectric Force Sensing and Gesture Monitoring-Based Technique for Acupuncture Quantification.
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Chen, Bo, Lin, Kaize, Xu, Lijun, Cao, Jin, and Gao, Shuo
- Abstract
Acupuncture is one of the most significant therapies of Chinese traditional medical science, and it is now globally utilized for diverse treatments, e.g., pain management. Traditionally, there is no quantification means for storing masters’ skills and examining trainee’s learning effect, hence, strongly limiting the development of acupuncture. For addressing this issue, in this article, a piezoelectric glove based wearable stress sensing technique is presented. Experimental results showcase that through the piezoelectric force-sensing glove, key parameters (e.g., peak stress at needle) during performing acupuncture are detected and extracted. Simultaneously, the Leap Motion, as a finger gesture monitoring technique, is utilized to capture the finger motion during acupuncture, allowing trainees to have a straightforward understanding of how gesture details are correlated to the stress information. The technique presented in this article potentially improves the learning efficiency of trainees and therefore advancing the progress of acupuncture. [ABSTRACT FROM AUTHOR]
- Published
- 2021
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42. Acute intramural abscess of the pyloric antrum--localized phlegmon
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Gordon H. MacPherson and Gordon Gillespie
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Adult ,medicine.medical_specialty ,Abdominal pain ,Pain ,Phlegmonous gastritis ,Phlegmon ,Gastrectomy ,Abdomen ,medicine ,Humans ,Gastric resection ,Abscess ,Pylorus ,business.industry ,Cellulitis ,medicine.disease ,Surgery ,medicine.anatomical_structure ,Pyloric Antrum ,Epigastrium ,Gastritis ,Acute Disease ,Granulation Tissue ,Female ,medicine.symptom ,business - Abstract
A case of acute ‘localized’ phlegmonous gastritis is described. The predominant clinical features were persistent abdominal pain and a tender mass in the epigastrium. Complete recovery followed partial gastric resection.
- Published
- 1972
43. Mortality and disease burden of oral cancer in China: a time-trend analysis on the China Death Surveillance Database from 2006 to 2021.
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Zhang, Xiaoyue, Xie, Weihong, Ye, Hua, Zhu, Jicun, Sun, Guiying, Zhang, Yaxin, Sheng, Chong, Li, Jiaxin, Liu, Haiyan, Zheng, Zhong, and Wang, Peng
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MOUTH tumors ,RESEARCH funding ,LIFE expectancy ,DESCRIPTIVE statistics ,METROPOLITAN areas ,RURAL conditions ,HEALTH equity ,CONFIDENCE intervals ,ECONOMIC aspects of diseases - Abstract
Background: Oral cancer is one of the most common cancers in China and seriously threaten life and health of Chinese people. We analysed the trends and disparities of oral cancer mortality rates and the disease burden of oral cancer in China from 2006 to 2021 to provide a reference for its prevention and control. Methods: Annual death data for oral cancer was gleaned from the China Death Surveillance Database. The age-standardized mortality rate (ASMR), annual percentage change (APC), and average APC (AAPC) were used to analyze the trend of mortality. Loss of life expectancy (LLE) and years of life lost (YLL) were adopted to assess disease burden. Results: From 2006 to 2021, the overall ASMR of oral cancer lightly declined (AAPC: − 0.97%; 95% CI: − 1.89%, − 0.04%), and the similar trend was observed among females (AAPC: − 1.22%; 95% CI: − 1.89%, − 0.55%). The ASMR of males was 2.31–3.16 times higher than that of females per year. The median of LLE for overall, males and females caused by oral cancer from 2006 to 2021 were 0.05, 0.06 and 0.03 years, respectively. There was a decrease of standardized YLL rate from 2006 to 2021 for overall (AAPC: − 1.31%, 95% CI: − 2.24% ~ − 0.37%) and for female (AAPC: − 1.63%, 95% CI: − 2.30% ~ − 0.95%). ASMR in urban areas was 1.02–1.28 times higher than that in rural areas from 2006 to2011, but 0.85–0.97 times lower in urban areas than that in rural areas from 2018 to 2021. The disease burden was higher in urban areas than in rural areas in 2006, whereas the reverse was observed in 2021. Conclusions: There are severe health gaps and disparities in trends between sexes and different areas in China. Males and rural populations need to be focused on targeted interventions for the main influencing factors. [ABSTRACT FROM AUTHOR]
- Published
- 2024
- Full Text
- View/download PDF
44. Neural evidence of deprioritizing to-be-forgotten information in visual working memory.
- Author
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Moen, Katherine C., Beck, Melissa R., Horner, Scarlett, and Greening, Steven G.
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VISUAL memory ,FUNCTIONAL magnetic resonance imaging ,COGNITIVE ability ,CONTROL (Psychology) ,LONG-term memory ,RECOLLECTION (Psychology) - Abstract
Introduction: Although evidence supports the effective use of a cue to forget an encoded stimulus, the mechanisms of this forgetting are not well understood. Evidence from item-method directed forgetting in long-term memory reveals greater prefrontal and parietal activation for information that is cued to be forgotten. Activation in those brain regions is typically associated with increased effort and cognitive control. Method: To test themechanismof directed forgetting in visual workingmemory, we used stimuli that rely on distinct brain regions such as faces and buildings and varied memory stability. Participants completed a directed forgetting task with faces and buildings, and memory stability was manipulated by presenting some stimuli repeatedly throughout the study, and other stimuli were only presented once. Results and discussion: Functional magnetic resonance imaging (fMRI) results fromthe parahippocampal place area suggest that to-be-remembered buildings elicit higher activation than to-be-forgotten buildings. In addition, dorsolateral prefrontal cortex activation changed throughout the trial period, possibly suggesting that the cue led to information being dropped from visual working memory, or through a shift in attention, as occurs with the retro-cue paradigm. Several explanations for these results are discussed. [ABSTRACT FROM AUTHOR]
- Published
- 2024
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45. The Role of Akkermansia muciniphila on Improving Gut and Metabolic Health Modulation: A Meta-Analysis of Preclinical Mouse Model Studies.
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Khalili, Leila, Park, Gwoncheol, Nagpal, Ravinder, and Salazar, Gloria
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WEIGHT loss ,EXTRACELLULAR vesicles ,GUT microbiome ,ANIMAL models in research ,BODY weight - Abstract
Akkermansia muciniphila (A. muciniphila) and its derivatives, including extracellular vesicles (EVs) and outer membrane proteins, are recognized for enhancing intestinal balance and metabolic health. However, the mechanisms of Akkermansia muciniphila's action and its effects on the microbiome are not well understood. In this study, we examined the influence of A. muciniphila and its derivatives on gastrointestinal (GI) and metabolic disorders through a meta-analysis of studies conducted on mouse models. A total of 39 eligible studies were identified through targeted searches on PubMed, Web of Science, Science Direct, and Embase until May 2024. A. muciniphila (alive or heat-killed) and its derivatives positively affected systemic and gut inflammation, liver enzyme level, glycemic response, and lipid profiles. The intervention increased the expression of tight-junction proteins in the gut, improving gut permeability in mouse models of GI and metabolic disorders. Regarding body weight, A. muciniphila and its derivatives prevented weight loss in animals with GI disorders while reducing body weight in mice with metabolic disorders. Sub-group analysis indicated that live bacteria had a more substantial effect on most analyzed biomarkers. Gut microbiome analysis using live A. muciniphila identified a co-occurrence cluster, including Desulfovibrio, Family XIII AD3011 group, and Candidatus Saccharimonas. Thus, enhancing the intestinal abundance of A. muciniphila and its gut microbial clusters may provide more robust health benefits for cardiometabolic, and age-related diseases compared with A. muciniphila alone. The mechanistic insight elucidated here will pave the way for further exploration and potential translational applications in human health. [ABSTRACT FROM AUTHOR]
- Published
- 2024
- Full Text
- View/download PDF
46. Machine learning applied to apatite compositions for determining mineralization potential.
- Author
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Zheng, Yu-yu, Xu, Bo, Lentz, David R., Yu, Xiao-yan, Hou, Zeng-qian, and Wang, Tao
- Abstract
Apatite major and trace element chemistry is a widely used tracer of mineralization as it sensitively records the characteristics of the magmatic-hydrothermal system at the time of its crystallization. Previous studies have proposed useful indicators and binary discrimination diagrams to distinguish between apatites from mineralized and unmineralized rocks; however, their efficiency has been found to be somewhat limited in other systems and larger-scale data sets. This work applied a machine learning (ML) method to classify the chemical compositions of apatites from both fertile and barren rocks, aiming to help determine the mineralization potential of an unknown system. Approximately 13 328 apatite compositional analyses were compiled and labeled from 241 locations in 27 countries worldwide, and three apatite geochemical data sets were established for XGBoost ML model training. The classification results suggest that the developed models (accuracy: 0.851–0.992; F1 score: 0.839–0.993) are much more accurate and efficient than conventional methods (accuracy: 0.242–0.553). Feature importance analysis of the models demonstrates that Cl, F, S, V, Sr/Y, V/Y, Eu
* , (La/Yb)N , and La/Sm are important variables in apatite that discriminate fertile and barren host rocks and indicates that V/Y and Cl/F ratios and the S content, in particular, are crucial parameters to discriminating metal enrichment and mineralization potential. This study suggests that ML is a robust tool for processing high-dimensional geochemical data and presents a novel approach that can be applied to mineral exploration. [ABSTRACT FROM AUTHOR]- Published
- 2024
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47. Zircon Constraints on the Eruptive Sequence and Magma Evolution of Rhyolites at South Sister Volcano, Oregon.
- Author
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Dechert, Annika E., Andersen, Nathan L., Dufek, Josef, and Jilly, Christine E.
- Subjects
SPHENE ,PLAGIOCLASE ,PLEISTOCENE Epoch ,HOLOCENE Epoch ,ZIRCON - Abstract
We present 230Th‐238U crystallization ages and trace element compositions for zircons spanning the late Pleistocene to Holocene rhyolite eruptive record at South Sister volcano in the central Oregon Cascade Range. Most zircon ages are between 100 and 20 ka, with very few in secular equilibrium (>350 ka). The weighted mean of zircon ages for the two oldest South Sister rhyolites, 31.5 ± 2.1 and 39.1 ± 2.4 ka, are significantly younger than the associated 40Ar/39Ar ages, 47.4 ± 9.7 and 51.4 ± 9.7 ka. We propose that these 40Ar/39Ar dates, performed on plagioclase separates, are compromised by a subtle amount of excess Ar and therefore the younger weighted mean zircon ages yield more reliable eruption ages. These results imply that the interval of rhyolite eruption at South Sister during the late Pleistocene was both shorter and more productive than previously thought and that eruption at South Sister initiated after Middle Sister. Compositionally, zircons from the Pleistocene rhyolites are broadly similar and show down‐temperature zircon and plagioclase crystallization trends. However, we argue that destabilized amphibole and titanite in a common mush also exert leverage on the Pleistocene zircon trace element compositions. Divergence in the Eu/Eu* ratio between the Pleistocene and Holocene lavas implies chemically distinct magma reservoirs originating from the Pleistocene rhyolite eruptive sequence and the Holocene eruptive sequence. This work suggests a higher flux of rhyolite volcanism than previously thought and characterizes magmatic storage distinctions between the Pleistocene and Holocene rhyolites, aiding in the assessment of future eruptive hazards at South Sister volcano. Key Points: Zircon ages shift inferred eruption ages for two South Sister rhyolites over 10 kyr youngerCrystallization of zircon and plagioclase as well as destabilized amphibole and titanite leveraged melt compositions of Pleistocene magmasCompositional distinctions between the Pleistocene and Holocene lavas suggest distinct melt sources for both eruption sequences [ABSTRACT FROM AUTHOR]
- Published
- 2024
- Full Text
- View/download PDF
48. Analysis of development trend of karst carbon cycle and carbon sink effect based on Web of Science.
- Author
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ZHONG Liang, ZHANG Chunlai, HU Fen, and CAO Jianhua
- Subjects
CARBON cycle ,BIBLIOMETRICS ,CARBON offsetting ,CARBONATE rocks ,OXYGEN isotopes - Abstract
Karstification refers to the chemical dissolution of carbonate rocks by water and the deposition of calcium carbonate due to CO2 degassing. In a macro sense, karstification can be divided into epikarstification and deep-seated (geothermal) karstification. Karst covers about 22 million km2 all over the world, accounting for 15% of the land area, and is of enormous carbon sink potential. Therefore, to alleviate the pressure of carbon neutrality and help China achieve the "Dual Carbon" target, it is of great significance for us to accurately understand the relationship between karst and carbon cycle and the carbon sink effect of karst. As an important tool for us to comprehensively understand the research progress in a specific area, bibliometric analysis can measure the relationship and influence among publications through a series of mathematical and statistical tools, and hence has been applied in many research fields. In order to understand the research hotspots and the development directions in the field of karst carbon cycle and carbon sink effect, this study undertook bibliometric citation analysis on 573 contributions to the literature written from January the 1st, 1991 to June the 6th, 2017, based on the Web of Science core collection. CiteSpace was used to analyze keyword frequency and emergency, country (region) and institution, author impact, research hot spot, co-cited literature and evolution of research topics. [ABSTRACT FROM AUTHOR]
- Published
- 2024
- Full Text
- View/download PDF
49. The Capability of Amphibole in Tracing the Physicochemical Processes of Magma Mixing.
- Author
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Li, Mingjian, Zeng, Yunchuan, Tiepolo, Massimo, Xu, Jifeng, Cannaò, Enrico, Forni, Francesca, and Huang, Feng
- Subjects
BORON isotopes ,AMPHIBOLES ,MAGMAS ,IGNEOUS rocks ,STRONTIUM isotopes ,PLAGIOCLASE - Abstract
This study explores the capability of amphibole in tracing the physicochemical process of magma mixing through spatially associated gabbros, mafic microgranular enclaves (MMEs) and granodiorites from central Tibet. These rocks share similar zircon ages as well as zircon Hf‐O and plagioclase Sr isotopes. However, the amphiboles within the gabbros and granodiorites have different Sr and B isotope compositions, while amphiboles with both heterogeneous isotopic imprints occur in the MMEs. According to data and modeling, significant mixing of two isotopically distinct magmas is recorded by amphibole but not by zircon and plagioclase. Based on a synthesis of petrography, geochemistry and thermobarometry, we interpret this inconsistency by the crystallization order of minerals and propose that magma mixing occurred after the parent magma was emplaced at ∼10 km and cooled to ∼750°C. Our study highlights that amphibole may be a more sensitive tracer of magma mixing relative to other commonly used methods. Plain Language Summary: Magma mixing significantly shapes the composition of silicic igneous rocks representing the major constituent of the upper continental crust. Since bulk‐rock composition may only bear the average of mixed sources, in situ techniques such as Hf‐O isotopes in zircon and Sr‐Pb isotopes in plagioclase are widely used to investigate the details of magma mixing. However, these methods cannot constrain how magma mixing operates in the deep crust. This study novelly uses in situ Sr‐B isotopes and trace elements in amphibole to trace the physicochemical process of magma mixing through spatially associated gabbros, mafic microgranular enclaves and granodiorites from the central Tibetan Plateau. Our data show that significant mixing of two isotopically distinct magmas is recorded by amphibole but not by zircon and plagioclase. We demonstrate that the amphibole geochemistry (i.e., trace element, Sr‐B isotope compositions) may be more sensitive in tracing magma mixing relative to traditional isotopic tools and has the potential to unravel the physicochemical process(es) of magma mixing in the deep crust. In addition, our work reinforces the use of B isotopes in amphibole to discern the nature (fluids released from altered oceanic crust vs. residual slab) of the slab components that metasomatized the supra‐subduction mantle. Key Points: The amphiboles in central Tibetan magmatic complex have contrasting geochemical and Sr‐B isotopic compositionsSignificant magma mixing is well recorded by amphibole but not by zircon and plagioclaseAmphibole is a more sensitive tracer of magma mixing relative to zircon and plagioclase [ABSTRACT FROM AUTHOR]
- Published
- 2024
- Full Text
- View/download PDF
50. Mechanisms and Functions of Sweet Reception in Oral and Extraoral Organs.
- Author
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Yoshida, Ryusuke and Ninomiya, Yuzo
- Subjects
SWEETNESS (Taste) ,TRP channels ,PHYSIOLOGY ,GLUCOSE transporters - Abstract
The oral detection of sugars relies on two types of receptor systems. The first is the G-protein-coupled receptor TAS1R2/TAS1R3. When activated, this receptor triggers a downstream signaling cascade involving gustducin, phospholipase Cβ2 (PLCβ2), and transient receptor potential channel M5 (TRPM5). The second type of receptor is the glucose transporter. When glucose enters the cell via this transporter, it is metabolized to produce ATP. This ATP inhibits the opening of K
ATP channels, leading to cell depolarization. Beside these receptor systems, sweet-sensitive taste cells have mechanisms to regulate their sensitivity to sweet substances based on internal and external states of the body. Sweet taste receptors are not limited to the oral cavity; they are also present in extraoral organs such as the gastrointestinal tract, pancreas, and brain. These extraoral sweet receptors are involved in various functions, including glucose absorption, insulin release, sugar preference, and food intake, contributing to the maintenance of energy homeostasis. Additionally, sweet receptors may have unique roles in certain organs like the trachea and bone. This review summarizes past and recent studies on sweet receptor systems, exploring the molecular mechanisms and physiological functions of sweet (sugar) detection in both oral and extraoral organs. [ABSTRACT FROM AUTHOR]- Published
- 2024
- Full Text
- View/download PDF
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