100 results on '"Steve James"'
Search Results
2. When to abandon single-lung anesthesia during video-assisted thoracoscopic surgery (VATS) in infants and young children: A case-based review
- Author
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Chulananda Goonasekera, Malcolm Mathew, Meera Kurup, and Steve James
- Subjects
anesthesia ,risk-benefit ,one-lung ventilation ,utility ,video-assisted thoracoscopic surgery ,Anesthesiology ,RD78.3-87.3 - Abstract
Video-assisted thoracoscopic surgery (VATS) in infants and young children increasingly require one-lung anesthesia. However, the maintenance of norms of gas exchange is difficult during one-lung anesthesia in some infants. A combination of factors including added dead space of HME and the circle Y piece, intrathoracic inflation of CO2 and its pressure, airway resistance and bilateral lung disease contribute. Seeping blood from the operating lung soiling the endobronchial tube causes airway narrowing and obstruction adding to this difficulty especially during prolonged thoracoscopy. We report two cases: hypoxemia in one and hypercapnia in the other. Guidance on safe limits of permissive hypoxemia or hypercarbia in this scenario is vague. Therefore, irreversible hypoxemia and hypercarbia with changes in acid–base status should be considered as indications for swift conversion to open thoracotomy and abandon one-lung ventilation.
- Published
- 2021
- Full Text
- View/download PDF
3. Label-Free Creatinine Optical Sensing Using Molecularly Imprinted Titanium Dioxide-Polycarboxylic Acid Hybrid Thin Films: A Preliminary Study for Urine Sample Analysis
- Author
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Seung-Woo Lee, Soad Ahmed, Tao Wang, Yeawon Park, Sota Matsuzaki, Shinichi Tatsumi, Shigekiyo Matsumoto, Sergiy Korposh, and Steve James
- Subjects
liquid phase deposition ,molecular imprinting ,creatinine ,TiO2 nanothin film ,long period grating ,urine analysis ,Biochemistry ,QD415-436 - Abstract
Creatinine (CR) is a representative metabolic byproduct of muscles, and its sensitive and selective detection has become critical in the diagnosis of kidney diseases. In this study, poly(acrylic acid) (PAA)-assisted molecularly imprinted (MI) TiO2 nanothin films fabricated via liquid phase deposition (LPD) were employed for CR detection. The molecular recognition properties of the fabricated films were evaluated using fiber optic long period grating (LPG) and quartz crystal microbalance sensors. Imprinting effects were examined compared with nonimprinted (NI) pure TiO2 and PAA-assisted TiO2 films fabricated similarly without a template. In addition, the surface modification of the optical fiber section containing the LPG with a mesoporous base coating of silica nanoparticles, which was conducted before LPD-based TiO2 film deposition, contributed to the improvement of the sensitivity of the MI LPG sensor. The sensitivity and selectivity of LPGs coated with MI films were tested using CR solutions dissolved in different pH waters and artificial urine (near pH 7). The CR binding constants of the MI and NI films, which were calculated from the Benesi–Hildebrand plots of the wavelength shifts of the second LPG band recorded in water at pH 4.6, were estimated to be 67 and 7.8 M−1, respectively, showing an almost ninefold higher sensitivity in the MI film. The mechanism of the interaction between the template and the TiO2 matrix and the film composition was investigated via ultraviolet–visible and attenuated total reflectance Fourier-transform infrared spectroscopy along with X-ray photoelectron spectroscopy analysis. In addition, morphological studies using a scanning electron microscope and atomic force microscope were conducted. The proposed system has the potential for practical use to determine CR levels in urine samples. This LPG-based label-free CR biosensor is innovative and expected to be a new tool to identify complex biomolecules in terms of its easy fabrication and simplicity in methodology.
- Published
- 2021
- Full Text
- View/download PDF
4. Vitamin E hydroquinone is an endogenous regulator of ferroptosis via redox control of 15-lipoxygenase.
- Author
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Andrew Hinman, Charles R Holst, Joey C Latham, Joel J Bruegger, Gözde Ulas, Kevin P McCusker, Akiko Amagata, Dana Davis, Kevin G Hoff, Amanda H Kahn-Kirby, Virna Kim, Yuko Kosaka, Edgar Lee, Stephanie A Malone, Janet J Mei, Steve James Richards, Veronica Rivera, Guy Miller, Jeffrey K Trimmer, and William D Shrader
- Subjects
Medicine ,Science - Abstract
Ferroptosis is a form of programmed cell death associated with inflammation, neurodegeneration, and ischemia. Vitamin E (alpha-tocopherol) has been reported to prevent ferroptosis, but the mechanism by which this occurs is controversial. To elucidate the biochemical mechanism of vitamin E activity, we systematically investigated the effects of its major vitamers and metabolites on lipid oxidation and ferroptosis in a striatal cell model. We found that a specific endogenous metabolite of vitamin E, alpha-tocopherol hydroquinone, was a dramatically more potent inhibitor of ferroptosis than its parent compound, and inhibits 15-lipoxygenase via reduction of the enzyme's non-heme iron from its active Fe3+ state to an inactive Fe2+ state. Furthermore, a non-metabolizable isosteric analog of vitamin E which retains antioxidant activity neither inhibited 15-lipoxygenase nor prevented ferroptosis. These results call into question the prevailing model that vitamin E acts predominantly as a non-specific lipophilic antioxidant. We propose that, similar to the other lipophilic vitamins A, D and K, vitamin E is instead a pro-vitamin, with its quinone/hydroquinone metabolites responsible for its anti-ferroptotic cytoprotective activity.
- Published
- 2018
- Full Text
- View/download PDF
5. LC3-Associated Phagocytosis Is Required for Dendritic Cell Inflammatory Cytokine Response to Gut Commensal Yeast Saccharomyces cerevisiae
- Author
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Dimitra Lamprinaki, Gemma Beasy, Aleksandra Zhekova, Alexandra Wittmann, Steve James, Jo Dicks, Yoichiro Iwakura, Shinobu Saijo, Xiaomin Wang, Chung-Wai Chow, Ian Roberts, Tamas Korcsmaros, Ulrike Mayer, Thomas Wileman, and Norihito Kawasaki
- Subjects
LC3-associated phagocytosis ,dendritic cell-associated lectin 2 ,fungi ,dendritic cell ,autophagy ,Immunologic diseases. Allergy ,RC581-607 - Abstract
The human fungal microbiota known as mycobiota is increasingly recognized as a critical factor in human gut health and disease. Non-pathogenic commensal yeasts such as Saccharomyces cerevisiae promote homeostasis in the gut, whereas dysbiosis of the gut mycobiota is associated with inflammation. Glycan-binding receptors (lectins) are key host factors in host–mycobiota interaction in the gut. They are expressed on immune cells such as dendritic cells (DCs) and recognize fungal polysaccharides. This interaction is imperative to mount appropriate immune responses for immune homeostasis in the gut as well as clearance of fungal pathogens. Recent studies demonstrate that microtubule-associated protein light-chain 3 (LC3)-associated phagocytosis (LAP) is involved in lectin–fungi interactions. Yet, the biological impact of LAP on the lectin function remains largely elusive. In this report, we demonstrate that in mouse LAP is linked to dendritic cell-associated lectin 2 (Dectin-2), a C-type lectin specific to fungal α-mannan polysaccharide. We found that mouse Dectin-2 recognizes commensal yeast S. cerevisiae and Kazachstania unispora. Mouse bone marrow-derived DCs (BMDCs) produced inflammatory cytokines TNFα and IL-1β in response to the yeasts in a Dectin-2 and spleen tyrosine kinase (Syk)-dependent manner. We found that S. cerevisiae and K. unispora induced LAP in mouse BMDCs upon internalization. Furthermore, LC3 was activated by stimulation of BMDCs with the yeasts in a Dectin-2 and Syk-dependent manner. To address the biological impact of LAP on Dectin-2 yeast interaction, we established a knock-in mouse strain (Atg16L1E230, thereafter called E230), which BMDCs exhibit autophagy-active and LAP-negative phenotypes. When stimulated with yeasts, E230 BMDCs produced significantly less amounts of TNFα and IL-1β. Taken together, we revealed a novel link between Dectin-2 and LAP that enables host immune cells to respond to mycobiota.
- Published
- 2017
- Full Text
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6. A tangible user interface for interactive data visualization.
- Author
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Ana Jofre, Steve James Szigeti, Stephen Tiefenbach Keller, Lan-Xi Dong, David Czarnowski, Frederico Tomé, and Sara Diamond
- Published
- 2015
7. Neural Transfer Learning for Repairing Security Vulnerabilities in C Code
- Author
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Chen, Zimin, Kommrusch, Steve James, Monperrus, Martin, Chen, Zimin, Kommrusch, Steve James, and Monperrus, Martin
- Abstract
In this paper, we address the problem of automatic repair of software vulnerabilities with deep learning. The major problem with data-driven vulnerability repair is that the few existing datasets of known confirmed vulnerabilities consist of only a few thousand examples. However, training a deep learning model often requires hundreds of thousands of examples. In this work, we leverage the intuition that the bug fixing task and the vulnerability fixing task are related and that the knowledge learned from bug fixes can be transferred to fixing vulnerabilities. In the machine learning community, this technique is called transfer learning. In this paper, we propose an approach for repairing security vulnerabilities named VRepair which is based on transfer learning. VRepair is first trained on a large bug fix corpus and is then tuned on a vulnerability fix dataset, which is an order of magnitude smaller. In our experiments, we show that a model trained only on a bug fix corpus can already fix some vulnerabilities. Then, we demonstrate that transfer learning improves the ability to repair vulnerable C functions. We also show that the transfer learning model performs better than a model trained with a denoising task and fine-tuned on the vulnerability fixing task. To sum up, this paper shows that transfer learning works well for repairing security vulnerabilities in C compared to learning on a small dataset., QC 20231117
- Published
- 2023
- Full Text
- View/download PDF
8. Investigating antibody reactivity to the intestinal microbiome in severe myalgic encephalomyelitis/chronic fatigue syndrome (ME/CFS)
- Author
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Katharine A. Seton, Marianne Defernez, Andrea Telatin, Sumeet K. Tiwari, George M. Savva, Antonietta Hayhoe, Alistair Noble, Ana Carvalho, Steve James, Amolak Bansal, Thomas Wileman, and Simon R. Carding
- Abstract
Myalgic encephalomyelitis/chronic fatigue syndrome (ME/CFS) is a multisystemic disease of unknown aetiology that is characterised by disabling chronic fatigue and involves both the immune and gastrointestinal (GI) systems. Patients display alterations in GI microbiome with a significant proportion experiencing GI discomfort and pain and elevated blood biomarkers for altered intestinal permeability compared with healthy individuals. To investigate a possible GI origin of ME/CFS we designed a feasibility study to test the hypothesis that ME/CFS pathogenesis is a consequence of increased intestinal permeability that results in microbial translocation and a breakdown in immune tolerance leading to generation of antibodies reactive to indigenous intestinal microbes. Secretory IgA and serum IgG levels and reactivity to intestinal microbes were assessed in five pairs of severe ME/CFS patients and matched same-household healthy controls. For profiling serum IgG we developed IgG-Seq which combines flow-cytometry based bacterial cell sorting and metagenomics to detect mucosal IgG reactivity to the microbiome. We uncovered evidence for immune dysfunction in severe ME/CFS patients that was characterised by reduced capacity and reactivity of serum IgG to stool microbes, irrespective of their source. This study provides the rationale for additional studies in larger cohorts of ME/CFS patients to further explore immune-microbiome interactions.
- Published
- 2023
9. Output to input: concepts for physical data representations and tactile user interfaces.
- Author
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Steve James Szigeti, Anne Stevens, Robert Tu, Ana Jofre, Alex Gebhardt, Fanny Chevalier, Jonathan Lee, and Sara Diamond
- Published
- 2014
- Full Text
- View/download PDF
10. Designing portable solutions to support collaborative workflow in long-term care: A five point strategy.
- Author
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Bhuvaneswari Arunachalan, Sara Diamond, Steve James Szigeti, Fanny Chevalier, Anne Stevens, Maziar Ghaden, Borzu Talaie, and Derek Reffly
- Published
- 2014
- Full Text
- View/download PDF
11. Development of an Autonomous Real Time Collision Avoidance Mobile Robot
- Author
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Steve James
- Abstract
In most circumstances, mobile robots are stated to be autonomous, with collision avoidance being a crucial aspect of designing an autonomous mobile robot. The goal of this paper is to create a simple autonomous real-time collision-avoidance mobile robot that moves to utilise ultrasonic sensors and infrared modules. In this paper, a collision-avoidance mobile robot is designed with built-in intelligence that guides itself whenever an impediment is in its way and manoeuvre around them without any collision. This robotic vehicle is built with an AT Mega 328 microcontroller. An ultrasonic sensor detects any obstacles ahead of it and on either side of the robot, there are two infrared (IR) modules integrates to detect the obstructions and transmit an instruction to the microcontroller. The error generation is decreased with the help of the Kalman filter. Based on the input signal from different sensor integrated in the robot the microcontroller instructs to travel in a various direction by actuating the motors connected to it via a motor driver. Keywords: Mobile robot, autonomous robot, collision avoidance, surveillance, accuracy
- Published
- 2022
12. A Fungal Foray in an NHP Gut Microbiome
- Author
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Steve James, Aimee Parker, Catherine Purse, Dave Baker, Andrea Telatin, Simon Funnell, and Simon Carding
- Subjects
General Materials Science - Abstract
The cynomolgus macaque, Macaca fascicularis, is a non-human primate (NHP) widely used in biomedical research as it shares behavioural, genetic, immunological and physiological similarities with humans. These similarities may extend to the enteric microbiome, with some microbial taxa common to both humans and NHPs. However, to date, the majority of these microbial surveys have focused on the prokaryome, and have largely ignored or overlooked the NHP gut mycobiome. To address this shortfall, we have undertaken a region-by-region taxonomic survey of the cynomolgus intestinal mycobiota, from duodenum to distal colon, of ten captive animals of differing age. Using a high-throughput ITS1 amplicon sequencing-based approach, we found that fungi from the Ascomycota phylum dominate the cynomolgus enteric mycobiota. The budding yeast genus Kazachstania was most abundant, with K. pintolopesii and K. telluris highly prevalent, and the predominant species in many of the intestinal samples. However, while K. pintolopesii was present throughout the primate GI tract, K. telluris was found mainly in the small intestine. In this study, K. pintolopesii was identified as the dominant enteric fungus in captive cynomolgus macaques. This contrasts with humans, where Candida albicans is a common member of the intestinal microbiota. To our knowledge, this is the first time K. pintolopesii has been identified as a primate gut commensal.
- Published
- 2022
13. When to abandon single-lung anesthesia during video-assisted thoracoscopic surgery (VATS) in infants and young children: A case-based review
- Author
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Steve James, Meera Kurup, Chulananda Goonasekera, and Malcolm Mathew
- Subjects
risk-benefit ,one-lung ventilation ,Dead space ,medicine.medical_treatment ,anesthesia ,utility ,video-assisted thoracoscopic surgery ,Review Article ,Hypercarbia ,Hypoxemia ,Airway resistance ,Anesthesiology ,medicine ,Thoracoscopy ,Anesthesia ,RD78.3-87.3 ,medicine.diagnostic_test ,business.industry ,respiratory system ,respiratory tract diseases ,Anesthesiology and Pain Medicine ,Video-assisted thoracoscopic surgery ,medicine.symptom ,Airway ,business ,Hypercapnia - Abstract
Video-assisted thoracoscopic surgery (VATS) in infants and young children increasingly require one-lung anesthesia. However, the maintenance of norms of gas exchange is difficult during one-lung anesthesia in some infants. A combination of factors including added dead space of HME and the circle Y piece, intrathoracic inflation of CO2 and its pressure, airway resistance and bilateral lung disease contribute. Seeping blood from the operating lung soiling the endobronchial tube causes airway narrowing and obstruction adding to this difficulty especially during prolonged thoracoscopy. We report two cases: hypoxemia in one and hypercapnia in the other. Guidance on safe limits of permissive hypoxemia or hypercarbia in this scenario is vague. Therefore, irreversible hypoxemia and hypercarbia with changes in acid-base status should be considered as indications for swift conversion to open thoracotomy and abandon one-lung ventilation.
- Published
- 2021
14. Topicks: Visualizing complex topic models for user comprehension.
- Author
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Jessica Peter, Steve James Szigeti, Ana Jofre, and Sara Diamond
- Published
- 2015
- Full Text
- View/download PDF
15. Development of a pipeline inspection (Pi-XTS) robot using additive manufacturing
- Author
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Steve James and R. Ambigai
- Published
- 2022
16. Repetition of Deliberate Self-Harm by Adolescents: The Role of Psychological Factors.
- Author
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Hawton, Keith, Kingsbury, Steve, James, Steinhardt, Karen, Steinhardt, Karen, James, A., and Fagg, Joan
- Abstract
Examines the relationship between psychological variables and repetition of deliberate self-harm by adolescents who have been admitted to hospital following an overdose. Adolescents with a history of previous overdose had higher scores for depression, hopelessness, and trait anger. Determined that depression is a key factor associated with risk of repetition of adolescent self-harm. (Author/JDM)
- Published
- 1999
17. The care and condition monitor: Designing a tablet based tool for visualizing informal qualitative healthcare data.
- Author
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Anne Stevens, Hudson Pridham, Steve James Szigeti, Sara Diamond, and Bhuvaneswari Arunachalan
- Published
- 2014
- Full Text
- View/download PDF
18. Biocontrol capability of local Metschnikowia sp. isolates
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Hubert Antolak, Ewelina Pawlikowska, Steve James, Dorota Kregiel, and Emília Breierová
- Subjects
Fusarium ,food.ingredient ,Food spoilage ,Flowers ,Metschnikowia ,Stress ,Microbiology ,DNA, Ribosomal ,03 medical and health sciences ,food ,Rhizopus ,BCA ,Piperidines ,Antibiosis ,Cluster Analysis ,Food science ,DNA, Fungal ,Mycological Typing Techniques ,Pest Control, Biological ,Molecular Biology ,Phylogeny ,030304 developmental biology ,Botrytis ,0303 health sciences ,Original Paper ,biology ,030306 microbiology ,Fungi ,Temperature ,General Medicine ,Sequence Analysis, DNA ,Hydrogen-Ion Concentration ,Alternaria ,biology.organism_classification ,Verticillium ,Yeast ,Amino Acids, Sulfur ,RNA, Ribosomal ,Fruit ,Screening ,Adhesion ,Poland - Abstract
This study set out to isolate and identify epiphytic yeasts producing pulcherrimin, and to evaluate their potential as biological control agents (BCAs). We isolated Metschnikowia sp. strains from flowers and fruits collected in Poland. The plant material had been collected between April to September 2017 from two small orchards where traditional organic management is employed. We identified the essential phenotypic features of the yeast, including assimilation and enzymatic profiles, stress resistance, adhesion properties, and antimicrobial activity against various fungi involved in crop and/or food spoilage. Yeast screening was performed using YPD agar supplemented with chloramphenicol and Fe(III) ions. Taxonomic classification was determined by sequence analysis of the D1/D2 domains of the large subunit rRNA gene. The isolates were identified as Metschnikowia andauensis and Metschnikowia sinensis. The yeast isolates were further characterized based on their enzymatic and assimilation profiles, as well as their growth under various stress conditions. In addition, the hydrophobicity and adhesive abilities of the Metschnikowia isolates were determined using a MATH test and luminometry. Their antagonistic action against molds representing typical crop spoiling microflora was also evaluated. The assimilation profiles of the wild isolates were similar to those displayed by collection strains of M. pulcherrima. However, some of the isolates displayed more beneficial phenotypic properties, especially good growth under stress conditions. Several of the epiphytes grew well over a wider range of temperatures (8–30 °C) and pH levels (3–9), and additionally showed elevated tolerance to ethanol (8%), glucose (30%), and peroxides (50 mM). The hydrophobicity and adhesion of the yeast cells were strain- and surface-dependent. The tested yeasts showed potential for use as BCAs, with some exhibiting strong antagonism against molds belonging to the genera Alternaria, Botrytis, Fusarium, Rhizopus, and Verticillium, as well as against yeasts isolated as food spoilage microbiota.
- Published
- 2019
19. Altered immunity to microbiota, B cell activation and depleted γδ / resident memory T cells in colorectal cancer
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Steve James, Edward Pring, John T Jenkins, Ripple Man, Stella C. Knight, Simon R. Carding, Stella Dilke, Lydia Durant, Alistair Noble, and Lesley Hoyles
- Subjects
Colorectal cancer ,medicine.medical_treatment ,T cell ,Immunotherapy ,Biology ,Immune dysregulation ,medicine.disease ,medicine.disease_cause ,Inflammatory bowel disease ,digestive system diseases ,Immune system ,medicine.anatomical_structure ,Immunology ,medicine ,Intraepithelial lymphocyte ,B cell - Abstract
We sought methods of rectifying microbiota:immune dysregulation as a route to prophylaxis and improved immunotherapy of colorectal cancer (CRC). CRC develops in gut epithelium, accompanied by low level inflammatory signaling, intestinal microbial dysbiosis and immune dysfunction. We examined populations of intraepithelial lymphocytes in non-affected colonic mucosa of CRC and healthy donors and circulating immune memory to commensal bacterial species and yeasts. Colonic tissue in CRC was significantly depleted of γδ T cells and resident memory T cells, populations with a regulatory CD39-expressing phenotype. T cell memory responses to a panel of commensals were distinct in CRC, while B cell memory responses to several bacteria/yeast were significantly increased, accompanied by increased proportions of effector memory B cells, transitional B cells and plasmablasts in blood. IgA responses to mucosal microbes were unchanged. Our data describe a novel immune signature with similarities to and differences from that of inflammatory bowel disease. They implicate B cell dysregulation as a potential contributor to parainflammation and identify pathways of weakened barrier function and tumor surveillance in CRC-susceptible individuals.
- Published
- 2021
20. Leak Proof
- Author
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Steve, James
- Abstract
Many school administrators protect their investments in new roofing systems by paying extra for an extended roof warranty. These warranties can be a valuable asset because they usually provide more coverage and reduce the school administrator's risk of having to pay for extensive roof repairs or replacements. Unfortunately, once an extended warranty is purchased, it usually is forgotten or ignored. As a result, roof inspections and maintenance that might be required under the terms of the warranty are missed, possibly voiding the warranty. Roofing asset-management software can help school administrators maximize the value of an extended roofing warranty. This article presents tips for choosing the appropriate roofing asset-management programs.
- Published
- 2005
21. Metal Additive Manufacturing Defect Formation and Nondestructive Evaluation Detectability
- Author
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Mohsen Seifi, Jess Waller, Steve James, Wilson Vesga, and Ben Dutton
- Subjects
Metal ,Materials science ,business.industry ,visual_art ,Nondestructive testing ,visual_art.visual_art_medium ,Structural integrity ,Composite material ,business - Published
- 2020
22. SEQUENCER: Sequence-to-Sequence Learning for End-to-End Program Repair
- Author
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Chen, Zimin, primary, Kommrusch, Steve James, additional, Tufano, Michele, additional, Pouchet, Louis-Noel, additional, Poshyvanyk, Denys, additional, and Monperrus, Martin, additional
- Published
- 2021
- Full Text
- View/download PDF
23. Label-Free Creatinine Optical Sensing Using Molecularly Imprinted Titanium Dioxide-Polycarboxylic Acid Hybrid Thin Films: A Preliminary Study for Urine Sample Analysis
- Author
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Tao Wang, Sota Matsuzaki, Yeawon Park, Soad Ahmed, Steve James, Shinichi Tatsumi, Seung-Woo Lee, Sergiy Korposh, and Shigekiyo Matsumoto
- Subjects
Materials science ,Scanning electron microscope ,Analytical chemistry ,Infrared spectroscopy ,QD415-436 ,02 engineering and technology ,Biochemistry ,01 natural sciences ,Analytical Chemistry ,long period grating ,TiO2 nanothin film ,chemistry.chemical_compound ,X-ray photoelectron spectroscopy ,Physical and Theoretical Chemistry ,Thin film ,urine analysis ,liquid phase deposition ,010401 analytical chemistry ,creatinine ,Quartz crystal microbalance ,021001 nanoscience & nanotechnology ,0104 chemical sciences ,chemistry ,Attenuated total reflection ,Titanium dioxide ,molecular imprinting ,0210 nano-technology ,Molecular imprinting - Abstract
Creatinine (CR) is a representative metabolic byproduct of muscles, and its sensitive and selective detection has become critical in the diagnosis of kidney diseases. In this study, poly(acrylic acid) (PAA)-assisted molecularly imprinted (MI) TiO2 nanothin films fabricated via liquid phase deposition (LPD) were employed for CR detection. The molecular recognition properties of the fabricated films were evaluated using fiber optic long period grating (LPG) and quartz crystal microbalance sensors. Imprinting effects were examined compared with nonimprinted (NI) pure TiO2 and PAA-assisted TiO2 films fabricated similarly without a template. In addition, the surface modification of the optical fiber section containing the LPG with a mesoporous base coating of silica nanoparticles, which was conducted before LPD-based TiO2 film deposition, contributed to the improvement of the sensitivity of the MI LPG sensor. The sensitivity and selectivity of LPGs coated with MI films were tested using CR solutions dissolved in different pH waters and artificial urine (near pH 7). The CR binding constants of the MI and NI films, which were calculated from the Benesi–Hildebrand plots of the wavelength shifts of the second LPG band recorded in water at pH 4.6, were estimated to be 67 and 7.8 M−1, respectively, showing an almost ninefold higher sensitivity in the MI film. The mechanism of the interaction between the template and the TiO2 matrix and the film composition was investigated via ultraviolet–visible and attenuated total reflectance Fourier-transform infrared spectroscopy along with X-ray photoelectron spectroscopy analysis. In addition, morphological studies using a scanning electron microscope and atomic force microscope were conducted. The proposed system has the potential for practical use to determine CR levels in urine samples. This LPG-based label-free CR biosensor is innovative and expected to be a new tool to identify complex biomolecules in terms of its easy fabrication and simplicity in methodology.
- Published
- 2021
24. Consortia formed by yeasts and acetic acid bacteria Asaia spp. in soft drinks
- Author
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Joanna Berlowska, Ewelina Pawlikowska, Hubert Antolak, Steve James, A. Rygała, and Dorota Kregiel
- Subjects
0301 basic medicine ,Sequence analysis ,Wickerhamomyces anomalus ,Microbial Consortia ,Hydrophobicity ,030106 microbiology ,Carbonated Beverages ,Asaia ,Biology ,Microbiology ,Bacterial Adhesion ,Rhodotorula mucilaginosa ,law.invention ,03 medical and health sciences ,Consortia ,law ,Yeasts ,Acetic acid bacteria ,Molecular Biology ,Gene ,Polymerase chain reaction ,Acetic Acid ,Original Paper ,Bacteria ,General Medicine ,Soft drinks ,biology.organism_classification ,Yeast ,030104 developmental biology ,Biofilms ,Food Microbiology - Abstract
Yeast strains and acetic acid bacteria were isolated from spoiled soft drinks with characteristic flocs as a visual defect. Polymerase chain reaction and amplification of a partial region of the LSU rRNA gene identified the bacteria as Asaia spp. Sequence analysis of the D1/D2 region of the 26S rDNA in turn identified the yeast isolates as Wickerhamomyces anomalus, Dekkera bruxellensis and Rhodotorula mucilaginosa. The hydrophobicity and adhesion properties of the yeasts were evaluated in various culture media, taking into account the availability of nutrients and the carbon sources. The highest hydrophobicity and best adhesion properties were exhibited by the R. mucilaginosa cells. Our results suggest that Asaia spp. bacterial cells were responsible for the formation of flocs, while the presence of yeast cells may help to strengthen the structure of co-aggregates.
- Published
- 2017
25. Characterising the human intestinal mycobiome during healthy ageing
- Author
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Lindsay J. Hall, David Baker, Sarah Phillips, Simon R. Carding, and Steve James
- Subjects
Infectious disease (medical specialty) ,Human microbiome ,General Materials Science ,Healthy ageing ,Sample collection ,Microbiome ,Biology ,Candida albicans ,biology.organism_classification ,Mycobiome ,Young infants ,Microbiology - Abstract
Although fungi are fundamental to the human microbiome, the diversity and dynamics of the mycobiome is poorly understood, particularly in considering their association with infectious disease, autoimmune disorders and atopy that affect immunocompromised individuals and infants. Characterising the human mycobiome faces several challenges relating to their low abundance and lack of standardized procedures for sample collection and isolation of viable cells and/or quality genetic material for culture-dependent and independent taxonomic and functional characterisation. To address these issues, we have developed a mycobiome analysis pipeline employing both culture-dependent and independent methods to identify as well as isolate, where possible, the fungal taxa populating the human intestinal tract. In a proof-of-concept study this pipeline has been used to identify fungal populations in faecal samples obtained from a small cohort of young infants, aged 2 years or younger. All were born prematurely, and severely immunocompromised and at risk from invasive and potentially lethal microbial infections, including those caused by fungal overgrowth. We have used this combined approach successfully to identify the fungi present in each individual infant, and to recover viable isolates. To date, Candida albicans and C. parapsilosis are the most frequently isolated fungi. While both are major opportunistic human fungal pathogens, C. parapsilosis is particularly problematic to preterm babies, due to its innate ability to form biofilms. Detailed characterisation of these isolates is currently underway. Two large-scale longitudinal microbiome studies have started at the Quadram Institute, and our validated analysis pipeline will be incorporated to define the fungal component of each study participant.
- Published
- 2019
26. Morgan's Men : The Inside Story of England's Rise From Cricket World Cup Humiliation to Glory
- Author
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Nick Hoult, Steve James, Nick Hoult, and Steve James
- Subjects
- Cricket matches--England
- Abstract
From English cricket's embarrassing failure at the 2015 World Cup to their heart-stopping victory four years later, Nick Hoult and Steve James vividly describe the team's dramatic journey from abject disappointment to finally lifting the trophy. Morgan's Men reveals how the team became the most aggressive limited-overs side in the world, led by their inspirational captain Eoin Morgan, whose vision and determination to succeed captured the imagination of the nation. Hoult and James follow England's journey from Bangladesh to Barbados, from Melbourne to Manchester, to present the inside story of the team's rebirth. They tell us how players dealt with the Ben Stokes court case, the sacking of Alex Hales for a drugs ban, and reveal the innovative new strategies and tactics that helped them become the best in the world, culminating in a World Cup final that was arguably the greatest one-day match of all time.
- Published
- 2020
27. Vitamin E hydroquinone is an endogenous regulator of ferroptosis via redox control of 15-lipoxygenase
- Author
-
Edgar Lee, Akiko Amagata, Yuko Kosaka, William D. Shrader, Jeffrey K. Trimmer, Joey C. Latham, Stephanie Malone, Joel J. Bruegger, Andrew W. Hinman, Janet J. Mei, Guy M. Miller, Kevin P. McCusker, Veronica Rivera, Gözde Ulas, Charles R. Holst, Steve James Richards, Dana A. Davis, Amanda H. Kahn-Kirby, Kevin G. Hoff, and Virna Kim
- Subjects
0301 basic medicine ,Antioxidant ,medicine.medical_treatment ,Metabolite ,Enzyme Metabolism ,alpha-Tocopherol ,Organic chemistry ,lcsh:Medicine ,Apoptosis ,Biochemistry ,Antioxidants ,Mice ,Lipoxygenase ,chemistry.chemical_compound ,0302 clinical medicine ,Vitamin E ,Arachidonate 15-Lipoxygenase ,Enzyme Chemistry ,lcsh:Science ,chemistry.chemical_classification ,Multidisciplinary ,biology ,Hydroquinone ,Quinones ,Chemical Reactions ,Vitamins ,Lipids ,Physical sciences ,Chemistry ,Bioassays and Physiological Analysis ,Research Article ,Cell Physiology ,Programmed cell death ,Iron ,Research and Analysis Methods ,Cell Line ,Chemical compounds ,03 medical and health sciences ,Lipid oxidation ,Organic compounds ,Oxidation ,medicine ,Animals ,Enzyme Assays ,lcsh:R ,Biology and Life Sciences ,Cell Biology ,Cell Metabolism ,030104 developmental biology ,Enzyme ,chemistry ,Cytoprotection ,Enzymology ,biology.protein ,lcsh:Q ,Lipid Peroxidation ,Biochemical Analysis ,030217 neurology & neurosurgery - Abstract
Ferroptosis is a form of programmed cell death associated with inflammation, neurodegeneration, and ischemia. Vitamin E (alpha-tocopherol) has been reported to prevent ferroptosis, but the mechanism by which this occurs is controversial. To elucidate the biochemical mechanism of vitamin E activity, we systematically investigated the effects of its major vitamers and metabolites on lipid oxidation and ferroptosis in a striatal cell model. We found that a specific endogenous metabolite of vitamin E, alpha-tocopherol hydroquinone, was a dramatically more potent inhibitor of ferroptosis than its parent compound, and inhibits 15-lipoxygenase via reduction of the enzyme's non-heme iron from its active Fe3+ state to an inactive Fe2+ state. Furthermore, a non-metabolizable isosteric analog of vitamin E which retains antioxidant activity neither inhibited 15-lipoxygenase nor prevented ferroptosis. These results call into question the prevailing model that vitamin E acts predominantly as a non-specific lipophilic antioxidant. We propose that, similar to the other lipophilic vitamins A, D and K, vitamin E is instead a pro-vitamin, with its quinone/hydroquinone metabolites responsible for its anti-ferroptotic cytoprotective activity.
- Published
- 2018
28. Flavour production by Saprochaete and Geotrichum yeasts and their close relatives
- Author
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Carmen Nueno-Palop, Eric Grondin, Thomas Petit, Alain Shum Cheong Sing, Steve James, Jean Marie François, Laboratoire de Chimie des Substances Naturelles et des Sciences des Aliments (LCSNSA), Université de La Réunion (UR), Institute of Food Research [Norwich], Laboratoire d'Ingénierie des Systèmes Biologiques et des Procédés (LISBP), Centre National de la Recherche Scientifique (CNRS)-Institut National des Sciences Appliquées - Toulouse (INSA Toulouse), Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-Institut National de la Recherche Agronomique (INRA), Démarche intégrée pour l'obtention d'aliments de qualité (UMR Qualisud), Centre de Coopération Internationale en Recherche Agronomique pour le Développement (Cirad)-Institut national d’études supérieures agronomiques de Montpellier (Montpellier SupAgro)-Université de La Réunion (UR)-Université de Montpellier (UM)-Avignon Université (AU)-Centre international d'études supérieures en sciences agronomiques (Montpellier SupAgro)-Université Montpellier 2 - Sciences et Techniques (UM2)-Université Montpellier 1 (UM1), European Regional development Funds (ERDF), Institut National de la Recherche Agronomique (INRA)-Institut National des Sciences Appliquées - Toulouse (INSA Toulouse), Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-Centre National de la Recherche Scientifique (CNRS), Centre de Coopération Internationale en Recherche Agronomique pour le Développement (Cirad)-Institut national d’études supérieures agronomiques de Montpellier (Montpellier SupAgro), Institut national d'enseignement supérieur pour l'agriculture, l'alimentation et l'environnement (Institut Agro)-Institut national d'enseignement supérieur pour l'agriculture, l'alimentation et l'environnement (Institut Agro)-Université de La Réunion (UR)-Université de Montpellier (UM)-Avignon Université (AU)-Centre international d'études supérieures en sciences agronomiques (Montpellier SupAgro)-Université Montpellier 2 - Sciences et Techniques (UM2)-Université Montpellier 1 (UM1), Biotechnology and Biological Sciences Research Council (BBSRC), Institut National des Sciences Appliquées (INSA)-Université de Toulouse (UT)-Institut National des Sciences Appliquées (INSA)-Université de Toulouse (UT)-Centre National de la Recherche Scientifique (CNRS), and Centre de Coopération Internationale en Recherche Agronomique pour le Développement (Cirad)-Université Montpellier 1 (UM1)-Université Montpellier 2 - Sciences et Techniques (UM2)-Centre international d'études supérieures en sciences agronomiques (Montpellier SupAgro)-Avignon Université (AU)-Université de La Réunion (UR)-Université de Montpellier (UM)-Institut national d’études supérieures agronomiques de Montpellier (Montpellier SupAgro)
- Subjects
0301 basic medicine ,Saprochaete ,Ehyl tiglate ,030106 microbiology ,Flavour ,Geotrichum ,yeast ,Galactomyces ,Analytical Chemistry ,Dipodascus ,03 medical and health sciences ,Unsaturated esters ,Genus ,[SDV.IDA]Life Sciences [q-bio]/Food engineering ,Food science ,biology ,General Medicine ,ethyl tiglate ,teleomorphs ,biology.organism_classification ,Yeast ,arôme ,flavour ,Flavoring Agents ,Magnusiomyces ,Biochemistry ,Taste ,Saccharomycetales ,souche de levure ,Food Science - Abstract
In this study, a total of 30 yeast strains belonging to the genera Dipodascus, Galactomyces, Geotrichum, Magnusiomyces and Saprochaete were investigated for volatile organic compound production using HS-SPME-GC/MS analysis. The resulting flavour profiles, including 36 esters and 6 alcohols compounds, were statistically evaluated by cluster and PCA analysis. Two main groups of strains were extracted from this analysis, namely a group with a low ability to produce flavour and a group producing mainly alcohols. Two other minor groups of strains including Saprochaete suaveolens, Geotrichum marinum and Saprochaete gigas were diverging significantly from the main groups precisely because they showed a good ability to produce a large diversity of esters. In particular, we found that the Saprochaete genus (and their closed relatives) was characterized by a high production of unsaturated esters arising from partial catabolism of branched chain amino-acids. These esters were produced by eight phylogenetically related strains of Saprochaete genus.
- Published
- 2017
29. Learning by leading
- Author
-
Steve James, June Barnes, and Mark Jenner
- Subjects
Wicked problem ,Leadership development ,business.industry ,Process (engineering) ,Organization development ,Capacity building ,HERO ,Narrative ,Sociology ,Public relations ,business ,Culture change ,Management - Abstract
Purpose – The purpose of this paper is to describe an innovative senior-level leadership development programme in housing association, East Thames Group, which was designed to build the capabilities needed to lead the organisation through a transformation in its culture and working practices. The programme engaged leaders in navigating and shaping culture change in East Thames and in so doing significantly enhanced their capacity for self-awareness, decision making and collaboration. Design/methodology/approach – The paper presents a descriptive narrative of the leadership development process from its inception in November 2011, through the experience of two cohorts comprising 40 senior managers during 2012, to the formal conclusion of the process in January 2013. The narrative employs a modified version of the hero's journey to describe the process of individual and organisational development during this period. Findings – The paper proposes an effective alternative to prescriptive, competency-based, leadership programmes which is grounded instead in a problem-solving approach where capacity-building results from participants acting on “wicked” organisational problems and learning by leading. Research limitations/implications – Learning by leading is a flexible, highly contextualised alternative to programmatic approaches to leadership development. The challenges faced by East Thames will be familiar to leaders in both public and private sectors. This methodology is relevant wherever the strategic goal is a dual transformation in organisation performance and leadership capacity. Practical implications – The paper includes a model of leadership development based on five stages of the hero's journey. These design principles translate into a structure – a container – where leaders can think, act and learn together in order to decide how and where to intervene in their situation to make a difference. Originality/value – The paper presents a rare longitudinal description of a senior level leadership development process which used a complex organisational problem as a vehicle for both leadership agency and leadership learning.
- Published
- 2013
30. Vitamin E hydroquinone is an endogenous regulator of ferroptosis via redox control of 15-lipoxygenase
- Author
-
Hinman, Andrew, primary, Holst, Charles R., additional, Latham, Joey C., additional, Bruegger, Joel J., additional, Ulas, Gözde, additional, McCusker, Kevin P., additional, Amagata, Akiko, additional, Davis, Dana, additional, Hoff, Kevin G., additional, Kahn-Kirby, Amanda H., additional, Kim, Virna, additional, Kosaka, Yuko, additional, Lee, Edgar, additional, Malone, Stephanie A., additional, Mei, Janet J., additional, Richards, Steve James, additional, Rivera, Veronica, additional, Miller, Guy, additional, Trimmer, Jeffrey K., additional, and Shrader, William D., additional
- Published
- 2018
- Full Text
- View/download PDF
31. Li(V0.5Ti0.5)S2 as a 1 V lithium intercalation electrode
- Author
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A. Robert Armstrong, Steve James Clark, Peter G. Bruce, Da Wang, EPSRC, and University of St Andrews. School of Chemistry
- Subjects
Materials science ,Science ,Intercalation (chemistry) ,NDAS ,Analytical chemistry ,General Physics and Astronomy ,Mineralogy ,02 engineering and technology ,010402 general chemistry ,01 natural sciences ,General Biochemistry, Genetics and Molecular Biology ,Article ,Lithium intercalation ,QD ,Graphite ,Polarization (electrochemistry) ,R2C ,Multidisciplinary ,General Chemistry ,QD Chemistry ,021001 nanoscience & nanotechnology ,0104 chemical sciences ,Anode ,Electrode ,BDC ,0210 nano-technology ,Voltage ,Solid solution - Abstract
Graphite, the dominant anode in rechargeable lithium batteries, operates at ∼0.1 V versus Li+/Li and can result in lithium plating on the graphite surface, raising safety concerns. Titanates, for example, Li4Ti5O12, intercalate lithium at∼1.6 V versus Li+/Li, avoiding problematic lithium plating at the expense of reduced cell voltage. There is interest in 1 V anodes, as this voltage is sufficiently high to avoid lithium plating while not significantly reducing cell potential. The sulfides, LiVS2 and LiTiS2, have been investigated as possible 1 V intercalation electrodes but suffer from capacity fading, large 1st cycle irreversible capacity or polarization. Here we report that the 50/50 solid solution, Li1+x(V0.5Ti0.5)S2, delivers a reversible capacity to store charge of 220 mAhg−1 (at 0.9 V), 99% of theoretical, at a rate of C/2, retaining 205 mAhg−1 at C-rate (92% of theoretical). Rate capability is excellent with 200 mAhg−1 at 3C. C-rate is discharge in 1 h. Polarization is low, 100 mV at C/2. To the best of our knowledge, the properties/performances of Li(V0.5Ti0.5)S2 exceed all previous 1 V electrodes., Lithium sulfides have been previously investigated as 1 V anodes for Li-ion batteries, but suffered from significant performance issues. Here, the authors report on a 1 V lithium sulfide electrode with noteworthy performance, demonstrating that sulfide-based electrodes may merit further exploration.
- Published
- 2016
32. Performance Monitoring of Australian Drug Law Enforcement Agencies: Impediments to and Prospects for Reform
- Author
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Caitlin Hughes and Steve James
- Subjects
Engineering ,Underpinning ,Status quo ,Project commissioning ,business.industry ,media_common.quotation_subject ,Law enforcement ,030508 substance abuse ,Public relations ,03 medical and health sciences ,Politics ,0302 clinical medicine ,Publishing ,Performance monitoring ,030212 general & internal medicine ,0305 other medical science ,business ,Law ,media_common - Abstract
Attention to performance monitoring of Australian drug law enforcement (DLE) agencies has increased in recent years. Yet history has shown efforts often come to nothing. Indeed the status quo - where there are undefined goals and scant reliable indicators of performance - has been maintained, despite 25 years of calls for improvement. The purpose of this article is to refocus attention from how Australian DLE performance monitoring ought to be measured, to the impediments to and prospects for reform. By critically examining the historical and policy drivers underpinning Australian DLE performance monitoring, five impediments to reform are put forward, including political unwillingness to expose the true capacities of DLE. This article contends that: while violating best-practice principles, the under-measurement of DLE suits various institutional and political rationales; and unless these drivers are addressed efforts to improve performance monitoring will continue to fail or fall short. Strategies for facilitating reform are outlined, including targeted advocacy.
- Published
- 2012
33. Experimental EPR-steering using Bell-local states
- Author
-
Geoff J. Pryde, Steve James Jones, Howard M. Wiseman, and Dylan J. Saunders
- Subjects
Physics ,Quantum discord ,Bell state ,Quantum pseudo-telepathy ,General Physics and Astronomy ,Quantum Physics ,Quantum entanglement ,Quantum capacity ,Physics::History of Physics ,Classical mechanics ,Bell's theorem ,Quantum mechanics ,Physics::Accelerator Physics ,Quantum teleportation ,No-communication theorem - Abstract
Erwin Schrodinger introduced in 1935 the concept of ‘steering’, which generalizes the famed Einstein–Podolsky–Rosen paradox. Steering sits in between quantum entanglement and non-locality — that is, entanglement is necessary for steering, but steering can be achieved, as has now been demonstrated experimentally, with states that cannot violate a Bell inequality (and therefore non-locality).
- Published
- 2010
34. The Shoreline Project for Street Drinkers: Designing and Running a Supported Housing Project for the 'Unhousable'
- Author
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Steve James and Heather Skinner
- Subjects
Marketing ,Economics and Econometrics ,Service quality ,business.industry ,Service delivery framework ,media_common.quotation_subject ,Service design ,Public relations ,Market orientation ,Top management ,Customer service ,Quality (business) ,business ,Empirical evidence ,media_common - Abstract
The nonprofit sector is increasingly faced with the challenges of adopting unfamiliar orientations focusing on customer service and quality which historically have been more usually associated with the commercial for-profit sector. Such organizations are also facing financial and competitive pressures which are also more commonly associated with the commercial world and market economies. These factors tend to imply that nonprofit organizations should adopt a market orientation. Indeed many initiatives offered by public and nonprofit organizations are now defined as “social marketing.” This article presents empirical evidence from a case study of an innovative supported-housing project for homeless street drinkers and considers the barriers faced when implementing the project. Issues surrounding top management leadership, service design, service quality, consumer engagement, and the engagement of frontline customers facing service delivery personnel are considered, as these would expect to be evident in a service organization with a strong market orientation. However, considering that the project was implemented contrary to the express wishes of both the organization's internal market of its service employees and the primary target market of its service users, conclusions are drawn within a conceptual framework that agrees with the need to consider a social rather than a market orientation to the provision of such services within nonprofit organizations.
- Published
- 2009
35. Exploring contradictory phylogenetic relationships in yeasts
- Author
-
Steve James, Ian N. Roberts, Qiong Wu, Vincent Moulton, and Katharina T. Huber
- Subjects
Genetics ,Phylogenetic tree ,Introgression ,Single gene ,General Medicine ,Phylogenetic network ,Biology ,Applied Microbiology and Biotechnology ,Microbiology ,Family Saccharomycetaceae ,Evolutionary biology ,Taxonomic resolution ,Taxonomy (biology) ,Clade - Abstract
Phylogenetic trees underlie our understanding of yeast evolution and are also proving instrumental in the development of a more robust yeast classification system based upon natural (i.e. evolutionary) relationships. In an effort to refine/improve taxonomic resolution, recent studies have focused on the use of multigene rather than single gene sequencing. Nevertheless, searches to determine 'the tree' remain problematic, as they can often overlook conflicts in the dataset. In such instances, phylogenetic networks such as neighbor-nets and consensus networks can provide a more useful and indeed more informative alternative means of analysis. In this study, we have used the latter two phylogenetic network techniques to reanalyze the multigene sequence dataset of Kurtzman & Robnett, which was used to redefine the taxonomy of the family Saccharomycetaceae. Results from our analyses show that, in general, established clades are robust. However, they also reveal conflict between mitochondrial- and nuclear-encoded genes and indicate the existence of complex patterns of hybridization and introgression not detected in the original study. These patterns are discussed in relation to how they may impact upon the current classification of this group of yeasts.
- Published
- 2008
36. The Change We Need
- Author
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Ganiyu Jimoh, Tejumola Olaniyan, Lekan Balogun, Oladeji A. Adebolujo, Sunday James, Oluwatoyin Olokodana James, and Itsewah, Steve James
- Published
- 2015
- Full Text
- View/download PDF
37. Long-Term Projects
- Author
-
Steve James
- Subjects
Finance ,business.industry ,business ,Psychology ,Term (time) - Published
- 2015
38. A comparative study on the potential of epiphytic yeasts isolated from tropical fruits to produce flavoring compounds
- Author
-
Alain Shum Cheong Sing, Yanis Caro, Eric Grondin, Thomas Petit, Carmen Nueno-Palop, Jean Marie François, Ando Lalaniaina Randrianierenana, Marson Raherimandimby, Steve James, Laboratoire de Chimie des Substances Naturelles et des Sciences des Aliments (LCSNSA), Université de La Réunion (UR), Université d'Antananarivo, Institute of Food Research [Norwich], Laboratoire d'Ingénierie des Systèmes Biologiques et des Procédés (LISBP), Centre National de la Recherche Scientifique (CNRS)-Institut National des Sciences Appliquées - Toulouse (INSA Toulouse), Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-Institut National de la Recherche Agronomique (INRA), Université Toulouse III - Paul Sabatier (UT3), Université Fédérale Toulouse Midi-Pyrénées, Institut National Polytechnique (Toulouse) (Toulouse INP), Institut National de la Recherche Agronomique (INRA), Institut National de la Recherche Agronomique (INRA)-Institut National des Sciences Appliquées - Toulouse (INSA Toulouse), Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-Centre National de la Recherche Scientifique (CNRS), Region Reunion and Europe, Biotechnology and Biological Sciences Research Council (BBSRC), Institut National des Sciences Appliquées (INSA)-Université de Toulouse (UT)-Institut National des Sciences Appliquées (INSA)-Université de Toulouse (UT)-Centre National de la Recherche Scientifique (CNRS), and Université de Toulouse (UT)
- Subjects
Sequence analysis ,principal component analysis ,Microorganism ,Biology ,yeast ,flavors ,Microbiology ,DNA, Ribosomal ,Rhodotorula mucilaginosa ,Yeasts ,Botany ,Madagascar ,Cluster Analysis ,[CHIM]Chemical Sciences ,Flavor ,biodiversity ,2. Zero hunger ,Tropical Climate ,Volatile Organic Compounds ,General Medicine ,Candida pararugosa ,Yeast ,Flavoring Agents ,Fruit ,Food Microbiology ,Epiphyte ,Gas chromatography ,Reunion ,Food Science ,biotechnology - Abstract
International audience; In recent years, there has been an increasing interest in identifying and characterizing the yeast flora associated with diverse types of habitat because of the many potential desirable technological properties of these microorganisms, especially in food applications. In this study, a total of 101 yeast strains were isolated from the skins of tropical fruits collected in several locations in the South West Indian Ocean. Sequence analysis of the D1/D2 domains of the large subunit (LSU) ribosomal RNA gene identified 26 different species. Among them, two species isolated from the skins of Cape gooseberry and cocoa beans appeared to represent putative new yeast species, as their LSU D1/D2 sequence was only 97.1% and 97.4% identical to that of the yeasts Rhodotorula mucilaginosa and Candida pararugosa, respectively. A total of 52 Volatile Organic Compounds (VOCs) were detected by Head Space Solid Phase Micro Extraction coupled to Gas Chromatography and Mass Spectroscopy (HS–SPME–GC/MS) from the 26 yeast species cultivated on a glucose rich medium. Among these VOCs, 6 uncommon compounds were identified, namely ethyl but-2-enoate, ethyl 2-methylbut-2-enoate (ethyl tiglate), ethyl 3-methylbut-2-enoate, 2-methylpropyl 2-methylbut-2-enoate, butyl 2-methylbut-2-enoate and 3-methylbutyl 2-methylbut-2-enoate, making them possible yeast species-specific markers. In addition, statistical methods such as Principal Component Analysis allowed to associate each yeast species with a specific flavor profile. Among them, Saprochaete suaveolens (syn: Geotrichum fragrans) turned to be the best producer of flavor compounds, with a total of 32 out of the 52 identified VOCs in its flavor profile.
- Published
- 2015
39. The Policing of Right‐Wing Violence in Australia
- Author
-
Steve James
- Subjects
Human rights ,media_common.quotation_subject ,Law enforcement ,Islam ,Legislature ,Criminology ,Indigenous ,Law ,Phenomenon ,Right wing ,Political science ,Enforcement ,Social Sciences (miscellaneous) ,media_common - Abstract
The paper examines trends in the policing of right‐wing violence in Australia. It describes and assesses the threat of violence from explicit right‐wing organizations, and outlines developments in the ‘hate’ crime phenomenon. The paper identifies several of the communities in Australia most vulnerable to such crime, such as the Indigenous community and in recent years members of the Islamic community. The paper explains and critiques national and local legislative and law enforcement responses to crimes of hate and violence based on racist and other discriminatory sentiments. It concludes by advocating a commitment by police services to a human rights enforcement ethic which renders intolerable the victimization of vulnerable communities by crimes motivated through hate.
- Published
- 2005
40. Lumbar artery aneurysm with associated aneurysms and AV fistula: a diagnostic and management dilemma with review of the literature
- Author
-
Steve James Beningfield, Nad Naidoo, Bibombe P. Mwipatayi, Saaleha Jadwat, and Charl Dreyer
- Subjects
medicine.medical_specialty ,medicine.diagnostic_test ,business.industry ,medicine.medical_treatment ,Fistula ,Uterine perforation ,Arteriovenous fistula ,medicine.disease ,Surgery ,Aneurysm ,medicine.artery ,Laparotomy ,Angiography ,medicine ,Radiology, Nuclear Medicine and imaging ,Iliac Aneurysm ,Radiology ,business ,Lumbar arteries - Abstract
A long-standing lumbar artery aneurysm associated with a right iliac aneurysms and arteriovenous fistulae is unusual. We report such a case of a 77-year-old female patient presenting with 6-months of backache radiating to both thighs and relieved by rest. Forty-three years prior to presentation she underwent a uterine dilatation and curettage for a missed abortion. This was complicated by uterine perforation and small bowel injury that was repaired at laparotomy. The clinical features and diagnostic and treatment options are discussed, with emphasis on the value of MRI, angiography and endovascular therapy. Coil embolisation was felt to be the most appropriate treatment of the lumbar artery aneurysms. The potential complications can be minimized by use of coils and selective catheterization. The current case demonstrates the difficulty of making a precise diagnosis and the importance of collateral branches that can re-perfuse the aneurysm despite exclusion of the primary inflow. The importance of follow-up angiography and repeat embolisation is also emphasised.
- Published
- 2004
41. The Telegraph Book of the Ashes 2013
- Author
-
The Daily Telegraph, Steve James, The Daily Telegraph, and Steve James
- Abstract
This summer's Ashes was another unforgettable instalment in the oldest and greatest rivalry in international sport. From the thrilling denouement at Trent Bridge, when Australia came within 19 runs of an incredible victory, to the stunning spell of hostile fast bowling from Stuart Broad in Durham and England's frantic run-chase in the gloom at the Oval in pursuit of an historic 4-0 series victory, the series was never less than engrossing. And - as always in an Ashes summer - there was as much intrigue off the field. David Warner made himself the English public's favourite pantomime villain by taking a swing at Joe Root before a ball was bowled, controversy raged over the standards of umpiring and the use of the Decision Review System while Darren Lehmann stoked the fires ahead of the return series Down Under with his infamous radio rant at Broad. The Daily and Sunday Telegraph's unbeatable team of cricket writers were present through the 2013 series to deliver the definitive account of events. Derek Pringle, Paul Hayward, Scyld Berry, Simon Hughes, Jim White, Steve James and Nick Hoult dissected events with forensic detail, and former captains Michael Vaughan and Geoffrey Boycott, together with Australian spinning legend Shane Warne, set the agenda with their hard-hitting columns. So, as you tick off the days to the first Test in Brisbane, relive the splendour of Ian Bell's three centuries, Ashton Agar's record-breaking debut, Root's stunning innings at Lord's and the spectacular bowling of Graeme Swann and James Anderson, as chronicled in the pages of the Daily and Sunday Telegraph.
- Published
- 2013
42. Reviews
- Author
-
David Dixon, Mark Halsey, Tiffany Bodiam, Deborah Ambery, and Steve James
- Subjects
Social Psychology ,Publishing ,business.industry ,Project commissioning ,Modernity ,media_common.quotation_subject ,Media studies ,Sociology ,business ,Law ,Economic Justice ,Pathology and Forensic Medicine ,media_common - Abstract
Police Reform: Building Integrity; Edited by Tim Prenzler and Janet Ransley (2002) Sydney: Hawkins Press, xiv + 234 pp., ISBN 1 8676067152 Crime and Modernity; By John Lea (2002) London: Sage, 213 pp., ISBN 0803975570 Prison Violence: The Dynamics of Conflict, Fear and Power; By Kimmett Edgar, Ian O'Donnell and Carol Martin (2003) Devon:Willan Publishing, 230 pp., ISBN 1903240980 Beyond the Tariff: Human Rights and the Release of Life Sentence Prisoners; By Nicola Padfield (2002) Devon:Willan Publishing, 208 pp., ISBN 1903240883 Captive Audience: Media, Masculinity and Power in Prisons; By Yvonne Jewkes (2002) Collompton:Willan Publishing, 224 pp., ISBN 1903240654 Policing, Ethics and Human Rights; By Peter Neyroud and Alan Beckley (with contributions by Paul Collier and Julia Clayton) (2001) Cullompton, Devon:Willan Publishing, 256pp, ISBN 1903240158.
- Published
- 2003
43. Zygosaccharomyces kombuchaensis: the physiology of a new species related to the spoilage yeastsZygosaccharomyces lentusandZygosaccharomyces bailii
- Author
-
Hazel Steels, Malcolm Stratford, Christopher J. Bond, Steve James, and Ian N. Roberts
- Subjects
Tea ,biology ,Zygosaccharomyces bailii ,Food spoilage ,Zygosaccharomyces ,General Medicine ,biology.organism_classification ,DNA, Ribosomal ,Applied Microbiology and Biotechnology ,Microbiology ,Yeast ,chemistry.chemical_compound ,Acetic acid ,chemistry ,Fermented tea ,Biochemistry ,Sorbic acid ,Phylogeny ,Benzoic acid - Abstract
Zygosaccharomyces kombuchaensis was recently discovered in the 'tea fungus' used to make fermented tea. Z. kombuchaensis was shown by ribosomal DNA sequencing to be a novel species, and a close relative of Zygosaccharomyces lentus, from which it could not be distinguished by conventional physiological tests. Z. lentus was originally established as a new taxon by growth at 4 degrees C, sensitivity for heat and oxidative stress, and lack of growth in aerobic shaken culture at temperatures above 25 degrees C. Subsequent analysis of Z. kombuchaensis reveals that this species shares these unusual characteristics, confirming its close genealogical relationship to Z. lentus. Detailed physiological data from a number of Z. kombuchaensis and Z. lentus strains clearly demonstrate that these two species can in fact be distinguished from one another based on their differing resistance/sensitivity to the food preservatives benzoic acid and sorbic acid. The spoilage yeasts Zygosaccharomyces bailii and Z. lentus are resistant to both acetic acid and sorbic acid, whereas Z. kombuchaensis is resistant to acetic acid but sensitive to sorbic acid. This would indicate that Z. kombuchaensis strains lack the mechanism for resistance to sorbic acid, but possess the means of resistance to acetic acid. This observation would therefore suggest that these two resistance mechanisms are different, and that in all probability acetic and sorbic acids inhibit yeast growth by different modes of action. Z. kombuchaensis strains were also sensitive to benzoic acid, again suggesting inhibition dissimilar from that to acetic acid.
- Published
- 2002
44. Investigating flavour characteristics of British ale yeasts: techniques, resources and opportunities for innovation
- Author
-
Steve James, Ian N. Roberts, Jo Dicks, Neva Parker, Chris White, Carmen Nueno-Palop, and Christopher J. Bond
- Subjects
Special Issue Articles ,biology ,business.industry ,Flavour ,Saccharomyces cerevisiae ,Beer ,Bioengineering ,biology.organism_classification ,Applied Microbiology and Biotechnology ,Biochemistry ,Yeast ,Biotechnology ,Flavoring Agents ,Saccharomyces ,Fermentation ,Genetics ,Brewing ,Potential source ,Food science ,business - Abstract
Five British ale yeast strains were subjected to flavour profiling under brewery fermentation conditions in which all other brewing parameters were kept constant. Significant variation was observed in the timing and quantity of flavour-related chemicals produced. Genetic tests showed no evidence of hybrid origins in any of the strains, including one strain previously reported as a possible hybrid of Saccharomyces cerevisiae and S. bayanus. Variation maintained in historical S. cerevisiae ale yeast collections is highlighted as a potential source of novelty in innovative strain improvement for bioflavour production. Copyright © 2014 John Wiley & Sons, Ltd.
- Published
- 2014
45. Replication data for: steveclimatic
- Author
-
Steve, James
- Published
- 2014
- Full Text
- View/download PDF
46. Purse, Soul and Intellectual Poverty: A Self-Infested Cause in Ben Tomoloju’s ‘Jankariwo’
- Author
-
Itsewah Steve James
- Subjects
Power (social and political) ,State (polity) ,Poverty ,Venality ,media_common.quotation_subject ,Law ,Impunity ,Followership ,Rationality ,Sociology ,Soul ,media_common - Abstract
Nigeria is a nation blessed beyond the borders of lack, yet Nigeria may be described from the planes as an impoverished state. A cross section of the dissection of the problems anchored within reveals that poverty and lack are the sole conditions upon which evident incongruities rest. Poverty of the soul, purse and of the mind or intellectual rationality are the major tripartite wheel upon which the glitches of the nation is foregrounded. This is manifested in the application of followership and leadership traits, the ways and manners that issues and concerns are treated are evidences of capricious leadership. It is believed that when leaders dothe needful and are sensitive enough to the provision of basic amenities to the citizenry, Nigeria state would have been one of the world powers. But the insensitivity and venality of our supposed leaders are unforgiveable and unforgettable, which has afflicted and infested on many families’ purse, soul and their intellectual deficiency. Evidences of aforementioned are captured in the play “Jankariwo”. This paper intends to chronicle the manners in which our leaders perpetrate their nefarious, callous, and ferocious acts with impunity, which has brought the country and many Nigerians to their knees via poverty affliction. However, the paper shall harvest the sociological theory and analytical methodology in dilating the level of these leaders’ ungodly act infested on those who voted them into power through Ben Tomoloju’s ‘Jankariwo’, (Cobwebs).
- Published
- 2016
47. Reducing Harassment of Lesbian, Gay, Bisexual, Transgender, and Questioning Youth in Schools
- Author
-
Samantha Macintosh, Mary Henning-Stout, and Steve James
- Subjects
media_common.quotation_subject ,School psychology ,Gender studies ,Verbal abuse ,Education ,Transgender ,Developmental and Educational Psychology ,Harassment ,Homosexuality ,Lesbian ,Psychology ,Social psychology ,Lesbian gay bisexual transgender ,Educational systems ,media_common - Abstract
School-based harassment and violence toward students perceived to be lesbian, gay, bisexual or transgender has been successfully confronted in educational systems across the U.S. A sampling of thes...
- Published
- 2000
48. Developments in Australian Drug Law Enforcement: Taking Stock
- Author
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Adam Sutton and Steve James
- Subjects
03 medical and health sciences ,0302 clinical medicine ,05 social sciences ,050501 criminology ,Law enforcement ,030216 legal & forensic medicine ,Business ,Law ,Stock (geology) ,0505 law ,Criminal justice ,Law and economics - Abstract
(2000). Developments in Australian Drug Law Enforcement: Taking Stock. Current Issues in Criminal Justice: Vol. 11, No. 3, pp. 257-272.
- Published
- 2000
49. Book reviews
- Author
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Elena Boyarovsky, Li‐Ju Chen, Steve James, Linda Robertson, John Langer, Elise E. Foxworth, Bruce Rumbold, and Adam Possamai
- Subjects
Cultural Studies ,History ,Sociology and Political Science - Published
- 1999
50. Book reviews
- Author
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Michael R. Stevenson, Holly Devor, Steve James, Michael D. Lyde, B. R. Simon Rosser, William Simon, and Michael W. Wiederman
- Subjects
Gender Studies ,History and Philosophy of Science ,Sociology and Political Science ,General Psychology - Published
- 1999
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