Search

Campylobacter is a human food-borne pathogen frequently associated with poultry and poultry products and can be found in high numbers within the gut contents of colonized broilers. The number of Campylobacter on broiler carcasses increases markedly during automated defeathering as rubber picker fingers press on the abdomen and can force gut contents out of the cloaca. One method to prevent this increase is to plug the cloaca and prevent escape of gut contents. For a plug to be effective, it must resist expulsion during picking. In the current work, we test shredded sponge or paper as a means to plug broiler carcass cloacae during automated feather removal. Broiler carcass cloacae were plugged before scalding and carcasses were sampled to determine the bacterial numbers present on breast skin after scalding (before feather picking) and again after feather picking. Neither 50 cc of shredded paper nor 25 cc of shredded sponge was effective as a cloacal plug. However, a plug made of 50 cc shredded sponge material was effective to occlude broiler carcass vents during automated defeathering. Significantly fewer Campylobacter cells were detected on the breast skin of post pick carcasses plugged with 50 mL of shredded sponge than on post pick unplugged control carcasses. [ABSTRACT FROM AUTHOR]

The author presents a personal narrative of his experiences as a psychologist, topics including pediatric psychology as a career choice, educational experience at University of North Dakota, and research on children behaviour psychology.

This paper presents a second-generation Schumpeterian growth model to investigate the existence of possible links between firms' size, competition stiffness and the effectiveness of R&D policy. In the model, the step size of innovation is randomly drawn from a Pareto distribution, and firms are heterogeneous in terms of market power. The paper finds that the optimal R&D policy is to subsidize R&D and not to tax it, and that more intense competition enlarges the gap between free-market R&D investment and the optimal outcome. However, the paper also finds that the short-run impact on welfare of R&D policy is always negative, and that the recovery time of the welfare loss as a result of the subsidy is negatively related to firms' market power. [ABSTRACT FROM AUTHOR]

Background Schizophrenia is a chronic disease associated with significant and long-lasting effects on health, and it is also a social and financial burden, not only for patients but also for families, other caregivers, and the wider society. It is essential to conduct the assessment of indirect costs, to understand all the effects of the disease on society. Our aim is to gain a better understanding of the indirect costs of schizophrenia in Europe. Methods We conducted a comprehensive systematic literature review covering EMBASE, Medline, and PsycINFO as well as reviewing Health Technology Assessment databases from different countries. We used a qualitative research synthesis for presenting information, as most of the studies were methodologically diverse, a quantitative analysis would have been impractical. Results Indirect cost adjusted to inflation ranged vastly between studies included in the review from 119 Euros to 62, 034 Euros annually. The average proportion of indirect costs of total costs was 44%. Studies highlighted important cost drivers as age, gender, and disease severity, explaining the variation in costs between treatment and patient groups. Conclusions Regardless of the methodological heterogeneity of the reviewed studies, there was an agreement about the significance of indirect costs of schizophrenia on the society. Considering the relatively high prevalence of schizophrenia in Europe, a need for more cost of illness studies especially from Central Eastern and Southern Europe is suggested. [ABSTRACT FROM AUTHOR]

Background Determinants of hypertension diagnosis and/or awareness and control among older adults are understudied in Albania, a former communist country in South Eastern Europe, which is experiencing rapid demographic, socioeconomic and epidemiological transition. This paper examines the association of individual, interpersonal, organizational and community factors with hypertension awareness and control among older adults in Tirana, the Albanian capital. Methods Using 2012 International Mobility in Aging Study data on older adults from Albania's capital city (n = 393) and the socioecological model as a conceptual framework, multinomial regression models identified factors associated with controlled, uncontrolled and undiagnosed hypertension. Results For hypertension, 17.3% participants had none, 23.4% were controlled, 48.4% were uncontrolled and 10.9% were undiagnosed/unaware. Compared to those with controlled hypertension, in multivariable models, a high level of friend support was negatively associated with uncontrolled (OR: 0.4; 95% CI: 0.2–0.9) and undiagnosed (OR: 0.2; 95% CI: 0.1–0.6) hypertension. A high level of perceived neighbourhood safety was negatively associated with uncontrolled (OR: 0.6; 95% CI: 0.3–1.0) and undiagnosed (OR: 0.4; 95% CI: 0.2–1.0) hypertension. Compared to those with no hypertension, children's social support was positively associated with uncontrolled (OR: 2.2; 95% CI: 1.1–4.3) and undiagnosed (OR: 3.6; 95% CI: 1.3–9.6) hypertension. Conclusion This study provides new insights about distinct risk factors for inadequate hypertension management in Albania. It highlights the importance of community-level factors (safety) and interpersonal factors (family and friend ties) to hypertension diagnosis/awareness and control, which may provide novel intervention opportunities for hypertension programs. [ABSTRACT FROM AUTHOR]

To improve the quality of human–computer interaction, it is important for computers to be able to identify the images quickly that can trigger pleasant feelings and create a good user experience. To reach this goal, the affective classification of images is an important prerequisite. Prior research into affective image classification used image features as categorical measurable signals. However, these techniques failed to provide a good correlation between the signal properties of image features and the expected affective experience of the viewer, leaving the research unable to bridge the affective gap. To solve this problem, in this paper we propose a method of affective image classification based on information about the user's experience collected through measurable eye movements and electroencephalography (EEG) signals. This approach bridges the affective gap by establishing an association between experience information (measurable signal properties) and the expected affective experience of the viewer. First, we screened eye movement indexes and EEG indexes to provide an affective correlation index. Then we built an experience space based on participants' physiological data obtained using an eye tracker and EEG recorder simultaneously. Next, physiological experience data from the experience space were extracted, analyzed mathematically and normalized to obtain parametric physiological experience data. Using a multiple linear regression technique, we connected the participants' affective states and physiological experience data. We developed a quantitative mapping between the affective experience states and the sample images to acquire the classification of affective images. To demonstrate the feasibility of the proposed classification method, we conducted a study in which 16 abstract art paintings were classified as positive, negative or neutral based on subjects' physiological responses. The results showed that the proposed affective image classification method was accurate and successful in identifying images that can lead to a pleasurable experience. [ABSTRACT FROM AUTHOR]

It is commonly believed that human-centred design (HCD) approach is very beneficial to interactive systems development. However, not much is known about the state of HCD practice in developing countries, especially the sub-Saharan Africa. This paper explores the state of HCD practice in three Nigerian software companies. We used the interview technique to explore two key issues. First, the perception of humans as a component of sociotechnical systems, and second, how HCD process is being approached in software companies. A cross-case analysis of the three companies was performed and the usability maturity model-human-centredness scale was used to determine the state of maturity of the three companies. The outcomes of this study reveal that HCD practice is currently at the least stage of maturity in the three companies and user involvement is not practiced in the right manner. The outcomes of the study suggest the need for reflective HCD practice and localizing human–computer interaction approaches to contexts. [ABSTRACT FROM AUTHOR]

It has been observed that converting scFv formatted antibodies to full-length IgG often associates with loss of affinity. We aim to address this issue in this paper by establishing an integrated affinity maturation method applying yeast display technology platform. To demonstrate that, we employed a human thrombopoietin receptor targeting antibody named 3D9 which was identified previously from a combinational antibody library in scFv-Fc fusion protein form. We have observed that significant potency loss happened when 3D9 was transformed to full-length IgG form. In this study, we tested whether the potency of the full-length IgG can be improved by affinity maturation of 3D9 using a modified Fab yeast display platform. An efficient CDR3 targeted mutagenesis strategy was designed for Fab library with pre-designed CDR diversity. Next generation sequencing was also used for evaluation of the enrichment process and investigation of sequence-function relationship of the antibody. A variant with improved affinity and higher potency was identified. The study demonstrates that the strategy we used here are efficient for optimizing affinity and activity of full-length IgGs. [ABSTRACT FROM AUTHOR]

We report on a solar jet phenomenon associated with the C5.4 class flare on 2014 November 11. The data of the jet was provided by the Solar Dynamics Observatory, the X-Ray Telescope (XRT) aboard Hinode, and the Interface Region Imaging Spectrograph and Domeless Solar Telescope (DST) at Hida Observatory, Kyoto University. These plentiful data enabled us to present this series of papers to discuss all the processes of the observed phenomena, including energy storage, event trigger, and energy release. In this paper, we focus on the energy release process of the observed jet, and mainly describe our spectral analysis on the Hα data of DST to investigate the internal structure of the Hα jet and its temporal evolution. This analysis reveals that in the physical quantity distributions of the Hα jet, such as line-of-sight velocity and optical thickness, there is a significant gradient in the direction crossing the jet. We interpret this internal structure as the consequence of the migration of the energy release site, based on the idea of ubiquitous reconnection. Moreover, by measuring the horizontal flow of the fine structures in the jet, we succeeded in deriving the three-dimensional velocity field and the line-of-sight acceleration field of the Hα jet. The analysis result indicates that part of the ejecta in the Hα jet experienced additional acceleration after it had been ejected from the lower atmosphere. This secondary acceleration was found to occur in the vicinity of the intersection between the trajectories of the Hα jet and the X-ray jet observed by Hinode/XRT. We propose that a fundamental cause of this phenomenon is magnetic reconnection involving the plasmoid in the observed jet. [ABSTRACT FROM AUTHOR]

The spin–orbit misalignment of stellar-mass black hole (sBH) binaries provides important constraints on the formation channels of merging sBHs. Here, we study the role of secular spin–orbit resonance in the evolution of an sBH binary component around a supermassive BH (SMBH) in an AGN disk. We consider the sBH's spin precession due to the J 2 moment introduced by a circum-sBH disk within the warping/breaking radius of the disk. We find that the sBH's spin–orbit misalignment (obliquity) can be excited via spin–orbit resonance between the sBH binary's orbital nodal precession and the sBH spin precession driven by a massive circum-sBH disk. Using an α -disk model with Bondi–Hoyle–Lyttleton accretion, the resonances typically occur for sBH binaries with semimajor axis of 1 au and at a distance of ∼1000 au around a 107 M ⊙ SMBH. The spin–orbit resonances can lead to high sBH obliquities and a broad distribution of sBH binary spin–spin misalignments. However, we note that the Bondi–Hoyle–Lyttleton accretion is much higher than that of Eddington accretion, which typically results in spin precession being too low to trigger spin–orbit resonances. Thus, secular spin–orbit resonances can be quite rare for sBHs in AGN disks. [ABSTRACT FROM AUTHOR]

Story-based learning is well recognized as an effective strategy for adult health education. However, there is a scarcity of research on story-based health education among women in South Asian diasporic communities. To address this gap, we undertook a pilot study in Toronto to explore how South Asian women respond to the use of fact-based and story-based materials for HIV/STI prevention. A total of 78 women were recruited from across the city. We engaged nearly half of the women (n =40) using fact sheets on HIV/STIs, and the remainder (n =38) using stories written by South Asian women on HIV/STIs. Surveys and focus groups were used to explore participants' responses in terms of knowledge, attitudes and perspectives. Results indicated that both approaches were effective in increasing participants' knowledge of HIV/STIs. Participants in the fact-based sessions tended to distance themselves from the idea of personal HIV/STI risks. Participants in the story-based groups were emotionally engaged, expressing personal commitments to take a stand against HIV stigma. In summary, within-culture stories are potentially effective tools that enable women to make sense of their own life situations and contextual vulnerabilities. Story-based materials are useful for breaking the silence of taboo topics, addressing stigma and discrimination and raising awareness about collective empowerment. [ABSTRACT FROM AUTHOR]

This article develops an economic model to analyze how the risk of water shortages affects farmers' land irrigation decision and how the priority-based water sharing arrangement redistributes such a risk among farms with different water rights priorities. The analysis brings together an array of comprehensive data files on irrigation rights, water supplies, and agricultural land use from eastern Idaho. Results indicate that a more left-skewed distribution of streamflow significantly discourages land irrigation among farmers except the most senior rights holders. The priority-based water sharing arrangement redistributes the macroscale risk of water shortages and thus exposes farmers of different water rights priorities to heterogeneous levels of risk: senior water rights holders are affected the least and such a risk is instead passed mostly on to junior water rights holders. The role of water rights in risk redistribution is more significant when the probability distribution of water shortage risk is asymmetric rather than symmetric. The historical development pattern of water rights influences how the priority of water rights takes effect on land irrigation decision. [ABSTRACT FROM AUTHOR]

In this article, we employ Bayesian hierarchical modeling to better capture and communicate the uncertainties surrounding the transformation of U.S. public agricultural research and development (R&D) expenditures to knowledge capital stocks as well as its contribution to the historic growth of U.S. agricultural total factor productivity. Compared to studies based on classical statistics, analytical methods grounded in Bayesian inference explicitly incorporate existing information and permit revision of our knowledge regarding the distribution of the unknown model parameters as additional information becomes available. Bayesian hierarchical modeling is particularly useful in statistically estimating the underlying parameters of the R&D lag weight structure, as well as the R&D knowledge stocks given observed data on agricultural productivity and R&D expenditures. Our results show a significant level of uncertainty on the R&D lag weight structure, indicating that published assumptions about the R&D lag structure can now be tested and validated against available data. Estimating the R&D lag weights and knowledge stocks also make a large difference in the uncertainties surrounding economic returns from R&D investments. Indeed, our results show that the best-fit linear model yields slightly higher mean returns to R&D spending relative to the log model results and have significantly less uncertainty. This suggests that marginal returns to U.S. public agricultural research spending might have remained relatively constant despite a century of growth in expenditure. Furthermore, we find that such investments could take a longer time to bear fruit than previously realized. [ABSTRACT FROM AUTHOR]

This article examines the impact that misreporting adoption status has on the identification and estimation of causal effects on productivity. In particular, by comparing measurement error-ridden self-reported adoption data with measurement-error-free DNA-fingerprinted adoption data, we investigate the extent to which such errors bias the causal effects of adoption on productivity. Taking DNA-fingerprinted adoption data as a benchmark, we find 25% "false negatives" and 10% "false positives" in farmers' responses. Our results show that misreporting of adoption status is not exogenous to household characteristics, and produces a bias of about 22 percentage points in the productivity impact of adoption. Ignoring inherent behavioral adjustments of farmers based on perceived adoption status has a bias of 13 percentage points. The results of this article underscore the crucial role that correct measurement of adoption plays in designing policy interventions that address constraints to technology adoption in agriculture. [ABSTRACT FROM AUTHOR]

We provide an in-depth analysis of the extent and nature of heterogeneity in willingness-to-pay (WTP) for the attributes of higher education institutions (HEIs). Using data from Ireland, mixed logit and generalized multinomial logit models are used to examine heterogeneity in WTP by region, academic ability, and socio-economic status. The analysis shows that regional variation in WTP for the attributes of HEIs is substantial, which suggests that preferences may be shaped by the characteristics of the region in which a student lives. Heterogeneity in WTP is also found based on a student's academic ability, with higher-ability students willing to pay considerably more for a higher-quality institution compared to lower-ability students. We also find that students in the highest socio-economic group are willing to pay more for all attributes. [ABSTRACT FROM AUTHOR]

In a corporate tournament, executive directors are motivated by the prospect of promotion to CEO, with winners receiving large increases in remuneration. Tournament losers by contrast face a discrete loss in their valuation of their position, since the prospect of them becoming CEO is substantially reduced. We argue that this offers an opportunity to test the predictions of tournament theory by observing the quit behaviour and the wages of the losing directors. We find a sharp increase in the likelihood that directors leave the firm when the tournament ends. The directors who remain receive an increase in their remuneration following a rival's promotion. [ABSTRACT FROM AUTHOR]

Small area ecological studies are commonly used in epidemiology to assess the impact of area level risk factors on health outcomes when data are only available in an aggregated form. However, the resulting estimates are often biased due to unmeasured confounders, which typically are not available from the standard administrative registries used for these studies. Extra information on confounders can be provided through external data sets such as surveys or cohorts, where the data are available at the individual level rather than at the area level; however, such data typically lack the geographical coverage of administrative registries. We develop a framework of analysis which combines ecological and individual level data from different sources to provide an adjusted estimate of area level risk factors which is less biased. Our method (i) summarizes all available individual level confounders into an area level scalar variable, which we call ecological propensity score (EPS), (ii) implements a hierarchical structured approach to impute the values of EPS whenever they are missing, and (iii) includes the estimated and imputed EPS into the ecological regression linking the risk factors to the health outcome. Through a simulation study, we show that integrating individual level data into small area analyses via EPS is a promising method to reduce the bias intrinsic in ecological studies due to unmeasured confounders; we also apply the method to a real case study to evaluate the effect of air pollution on coronary heart disease hospital admissions in Greater London. [ABSTRACT FROM AUTHOR]

Instrumental variable (IV) analysis is an increasingly popular tool for inferring the effect of an exposure on an outcome, as witnessed by the growing number of IV applications in epidemiology, for instance. The majority of IV analyses of time-to-event endpoints are, however, dominated by heuristic approaches. More rigorous proposals have either sidestepped the Cox model, or considered it within a restrictive context with dichotomous exposure and instrument, amongst other limitations. The aim of this article is to reconsider IV estimation under a structural Cox model, allowing for arbitrary exposure and instruments. We propose a novel class of estimators and derive their asymptotic properties. The methodology is illustrated using two real data applications, and using simulated data. [ABSTRACT FROM AUTHOR]

Copyright of Journal of Public Health is the property of Oxford University Press / USA and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Background: We aimed to systematically review the evidence on adverse mental health outcomes in breast cancer survivors (≥1 year) compared with women with no history of cancer.Methods: Studies were identified by searching MEDLINE, PsycINFO, the Cumulative Index to Nursing and Allied Health Literature, and the Social Sciences Citation Index, and through backward citation tracking. Two researchers selected the studies, extracted data, and assessed the risk of bias.Results: Sixty studies were included. Of 38 studies of depression, 33 observed more depression in breast cancer survivors; this was statistically significant in 19 studies overall, including six of seven where depression was ascertained clinically, three of four studies of antidepressants, and 13 of 31 that quantified depressive symptoms. Of 21 studies of anxiety, 17 observed more anxiety in breast cancer survivors, statistically significant in 11 studies overall, including two of four with clinical/prescription-based outcomes, and in eight of 17 of anxiety symptoms. Breast cancer survivors also had statistically significantly increased symptoms/frequency of neurocognitive dysfunction (18 of 24 studies), sexual dysfunctions (5 of 6 studies), sleep disturbance (5 of 5 studies), stress-related disorders/PTSD (2 of 3 studies), suicide (2 of 2 studies), somatisation (2 of 2 studies), and bipolar and obsessive-compulsive disorders (1 of 1 study each). Studies were heterogeneous in terms of participants' characteristics, time since diagnosis, ascertainment of outcomes, and measures reported. Approximately one-half of the studies were at high risk of selection bias and confounding by socio-economic status.Conclusions: There is compelling evidence of an increased risk of anxiety, depression and suicide, and neurocognitive and sexual dysfunctions in breast cancer survivors compared with women with no prior cancer. This information can be used to support evidence-based prevention and management strategies. Further population-based and longitudinal research would help to better characterize these associations. [ABSTRACT FROM AUTHOR]

Millions of dollars have been spent on the design and dissemination of educational materials to improve handwashing to prevent infectious diseases. School-age children have been the focus of many of these efforts; yet little is known about the content of these materials. This study uses content analysis to examine the theoretical and motivational trends as well as the communication approach used in a sample of hand hygiene intervention materials targeting elementary-age children. Two trained coders analyzed 144 communication materials. Study results indicate that educational materials infrequently exhibit information consistent with theories of communication for behavior change, commonly use fear-based messaging, and rarely recommend using technology in the design of the interventions. Implications for future research and the design of more strategic, child-focused hand hygiene interventions are discussed. [ABSTRACT FROM AUTHOR]

Background and objectives The objective was to systematically review transalveolar transplantation of maxillary canines and the long-term outcome for an average follow-up period of 2 years or more. Data collection and analysis A systematic review of the currently available literature until December 2017 was conducted, using Medline, Cochrane Central, Web off Science, and PubMed. Articles were screened for 1. indications, 2. contra-indications, 3. surgical planning, 4. surgical technique, 5. associated risk factors, and 6. long-term outcome for transalveolar transplantation of maxillary canines with the following outcome measures: bone-related outcomes, tooth-related outcomes, soft tissue-related outcomes, and aesthetic outcome measures. Descriptive statistics, as well as a quality assessment of included articles, were performed. Following study retrieval and selection, relevant data was extracted and the risk of bias was assessed using the Methodological index for non-randomized studies (MINORS). Results Twelve articles were included in this review. These studies included outcome data for 783 autotransplanted maxillary canines, with long-term studies indicating a clinically acceptable overall outcome. Limitations Since the lack of randomized controlled trials considering this topic, the quality of the evidence in the present review is considered low. However, impacted maxillary canines are a rare anomaly and different aspects, such as position of the impacted canine, patient's age and patient's demands, and expectancies must be taken into account, it is practically impossible to randomize treatment. Conclusions There is sufficient evidence to justify the transalveolar transplantation of maxillary canines as a legitimate treatment technique for impacted maxillary canines deemed difficult to treat with surgical exposure and subsequent orthodontic alignment. Long-term studies have shown that a good overall outcome is to be expected. There is no clear agreement in the literature on the indications and contra-indications for transalveolar transplantation of maxillary canines. Implication of key findings It is highly desirable that further research on this issue be undertaken, high-quality observational studies are recommended. Registration PROSPERO (CRD42017056348) [ABSTRACT FROM AUTHOR]

With the development of China's economy, the marine economy has been an important way of increasing national economic output value. However, the marine economy is still at the initial development stage. The theory and management of marine economy and resulting economic output value has not been able to satisfy the requirements of the overall economy. To increase the impact of the marine industry on the overall economic increase, the economic benefits in marine environment needs to be investigated and discussed. Using a Data Envelopment Analysis model, this study conducted data analysis for regional marine environments, noted relatively optimal aspects of marine economy based on the analysis results, analyzed an aspect of marine economy which is urgent to be improved, and suggests other solutions. Finally, the development prospects of marine economy were evaluated. This work aims at maximizing the economic output of marine environment and provides guidance for the development of marine economy. Some problems existing in the development of marine economy in coastal provinces were discovered, and suggestions, and counter measures were proposed to solve those problems. [ABSTRACT FROM AUTHOR]

Despite the promise of abundant renewable energy resources in the world, the poultry sector is still dominated by traditional energy sources. In this study, results of a field trial of an innovative and cost-effective HVAC system design applied to a poultry house have been presented. This system comprises of two integrated novel components; a polyethylene heat exchanger (PHE) based a photovoltaic thermal (PVt) array and an efficient and innovative ground pipe array coupled to a heat pump driven HVAC system. The analysis included the daily PV electrical output and heat pump performance. The results of the experimental study reveal that 3733 kWh and 2432 kWh heat energy have been supplied in the 7-week growth cycle of chickens condition, respectively. The COP of the HP has been calculated for the winter period and observed between 2.3 and 2.43. The PV system was able to generate 1876 kWh electrical energy with potential to meet HP's energy needs in the most energy needing period. [ABSTRACT FROM AUTHOR]

The energy consumption and economic performance of the solar PV cooling system, the solar absorption cooling system and the conventional vapor compression cooling system located in Hefei, Chengdu and Haikou have been analyzed. The annual cost method is used to compare the economic performance of the three kinds of cooling systems. For the PV cooling system, 'full power to grid' PV grid-connected mode and 'self-generated, left power to grid' PV grid-connected mode are discussed. And for the solar absorption cooling system, the single-effect absorption chiller and the double-effect absorption chiller are both discussed. Meanwhile, the economic performances of three kinds of cooling systems are also analyzed when PV subsidies are ignored and energy prices are variable. The results indicate that the economic performance of the PV cooling system is better than that of the solar absorption cooling system and the conventional vapor compression cooling system. Furthermore, even when PV subsidies are ignored or the energy prices change a lot, the economic performance of PV cooling is better than that of solar absorption cooling and conventional vapor compression cooling. [ABSTRACT FROM AUTHOR]

Due to environmental problems related to using fossil fuels and limitations in the sources of these types of fuels, renewable energies have sharply developed in recent decades. Renewable energy systems are applicable in various fields to provide clean energy. In the current study, medical and dental applications of renewable energies are reviewed. Based on the literature review, technologies based on renewable energy sources can be utilized in medical buildings and instruments. For instance, solar-based technologies can be applied in heating and cooling of hospitals and other healthcare facilities. In addition, the thermal energy of the sun is applicable in autoclaves and medical dryers. Although utilizing renewable energy systems for these applications requires more investment cost and probably more complicated structures, it would result in lower carbon dioxide emission which leads to sustainable development. [ABSTRACT FROM AUTHOR]

Uncertainty in the estimation of daytime ecosystem carbon cycling due to the light inhibition of leaf respiration and photorespiration, and how these small fluxes vary through the growing season in the field, remains a confounding element in calculations of gross primary productivity and ecosystem respiration. Our study focuses on how phenology, short-term temperature changes and canopy position influence leaf-level carbon exchange in Quercus rubra L. (red oak) at Harvard Forest in central Massachusetts, USA. Using leaf measurements and eddy covariance, we also quantify the effect of light inhibition on estimates of daytime respiration at leaf and ecosystem scales. Measured rates of leaf respiration in the light and dark were highest in the early growing season and declined in response to 10-day prior air temperatures (P < 0.01), evidence of within-season thermal acclimation. Leaf respiration was significantly inhibited by light (27.1 ± 2.82% inhibited across all measurements), and this inhibition varied with the month of measurement; greater inhibition was observed in mid-summer leaves compared with early- and late-season leaves. Increases in measurement temperature led to higher rates of respiration and photorespiration, though with a less pronounced positive effect on photosynthesis; as a result, carbon-use efficiency declined with increasing leaf temperature. Over the growing season when we account for seasonally variable light inhibition and basal respiration rates, our modeling approaches found a cumulative 12.9% reduction of leaf-level respiration and a 12.8% reduction of canopy leaf respiration, resulting in a 3.7% decrease in total ecosystem respiration compared with estimates that do not account for light inhibition in leaves. Our study sheds light on the environmental controls of the light inhibition of daytime leaf respiration and how integrating this phenomenon and other small fluxes can reduce uncertainty in current and future projections of terrestrial carbon cycling. [ABSTRACT FROM AUTHOR]

Northern oceans are in a state of rapid transition. Still, our knowledge of the likely effects of climate change and ocean acidification on key species in the food web, functionally important habitats and the structure of Arctic and sub-Arctic ecosystems is limited and based mainly on short-term laboratory studies on single species. This review discusses how tropical and temperate natural analogues of carbonate chemistry drivers, such as CO2 vents, have been used to further our knowledge of the sensitivity of biological systems to predicted climate change, and thus assess the capacity of different species to show long-term acclimation and adaptation to elevated levels of p CO2. Natural analogues have also provided the means to scale-up from single-species responses to community and ecosystem level responses. However, to date the application of such approaches is limited in high latitude systems. A range of Arctic and sub-Arctic sites, including CO2 vents, methane cold seeps, estuaries, up-welling areas, and polar fronts, that encompass gradients of pH, carbonate saturation state, and alkalinity, are suggested for future high latitude, in-situ ocean acidification research. It is recommended that combinations of monitoring of the chemical oceanography, observational, and experimental (in situ and laboratory) studies of organisms around these natural analogues be used to attain better predictions of the impacts of ocean acidification and climate change on high latitude species and ecosystems. [ABSTRACT FROM AUTHOR]

The Arctic marine environment is rapidly changing with rising sea surface temperatures, declining sea ice habitat and projected increases in boreal species invasions. The success of resident Arctic fish will depend on both their thermal tolerance and their ability to cope with changing trophic interactions. Larval fish energetic condition is closely associated with mortality rates and therefore provides an indicator of overall well-being or fitness. In this study, we experimentally determined larval morphometric and lipid-based condition in an Arctic gadid (Arctic cod, Boreogadus saida) and a boreal gadid (walleye pollock, Gadus chalcogrammus) in response to different temperatures and food rations. Our results suggest that larval condition is highly sensitive to both factors but varies in a species- and ontogenetic-dependent manner. Results indicated that condition metrics based on length–weight relationships were not as sensitive as those based on lipid storage. Further, condition metrics changed with ontogeny and were best used within a developmental stage rather than across developmental stages. As expected, larval condition in first-feeding Arctic cod was higher at colder temperatures (2–5°C) than in the boreal gadid (5–12°C). However, at more developed larval stages the peak condition for Arctic cod was at warmer temperatures (7°C), while walleye pollock had the same thermal optimum as during earlier stages. Arctic cod were more sensitive to food ration at first feeding than walleye pollock, however; at later larval stages both species had a negative condition response to low food ration, especially at elevated temperatures (5 vs. 7°C). The lower thermal tolerance of Arctic cod, coupled with a higher sensitivity to food availability indicates that Arctic cod are particularly vulnerable to on-going environmental change. Arctic cod is a lipid-rich keystone species and therefore a reduction in their energetic condition during summer has the potential to affect the health of higher trophic levels throughout the Alaskan Arctic. [ABSTRACT FROM AUTHOR]

Arctic cod (Boreogadus saida) is an ecologically significant species that is uniquely adapted to occupy ice edges, but warming and loss of sea ice are hypothesized to favour more facultative gadids, such as walleye pollock (Gadus chalcogrammus). To test this hypothesis, we experimentally measured the growth and survival of Arctic cod and walleye pollock at two larval stages across a range of temperature and food conditions in the laboratory. Results indicated early and late-stage Arctic cod larvae have a competitive growth and survival advantage over walleye pollock at low temperatures. However, these advantages are lost under warmer, food-productive conditions where walleye pollock larvae survived and experienced accelerated growth rates. Growth models developed from this study emphasize the need to account for both species- and stage-specific differences in the thermal response of closely related marine fish larvae. More broadly, these new vital rate data provide a mechanistic framework to forecast spatial-temporal shifts of gadids at the Arctic-boreal interface resulting from climatic warming and altered productivity regimes. [ABSTRACT FROM AUTHOR]

Background In accordance with the policy actions that address childhood overweight and obesity at European level and as a contribution to the EU Action Plan on Childhood Obesity 2014–20, a Joint Action on Nutrition and Physical Activity (JANPA) was established. As part of JANPA work package 6, an evaluation framework to identify good practices, targeting childhood obesity prevention in kindergartens and schools, was developed. This article describes the WP 6 JANPA framework of good practice criteria and its development, compares it to other frameworks and discusses its potential for future use. Methods Based on the analysis of scientific literature, a set of 47 potential good practice criteria was drafted, that was then revised and complemented through a series of online Delphi consultations. Results A final list of 48 good practice criteria (9 of which were rated as core criteria) was developed and grouped into three categories: intervention characteristics (n = 17), implementation (n = 17) and monitoring and evaluation (n = 14). Conclusion The identified JANPA framework of good practice criteria complements the existing frameworks by focussing on kindergarten- and school-based initiatives and provides guidance for evaluators, programme planners and decision makers bearing in mind that a one-size-fits-all approach is inadequate. To ensure the effectiveness of future practices, programme planners should endeavour to meet at least the nine JANPA core criteria. [ABSTRACT FROM AUTHOR]

Background The current economic context calls for rationalizing health resources that can be pursued through disinvestment from low value health technologies to invest in the best performing ones, ensuring high healthcare quality. Oncology is a field where, because of high costs of health technologies and rapid innovation, disinvestment is crucial. Methods On this basis, the research team investigated through a survey, based on a questionnaire, opinions and views of representatives of European countries about disinvestment, in terms of fields of application, potential advocates and barriers, specifically focusing on cancer care. Results A total of 17 questionnaires were filled in (response rate: 32.1%). The survey showed disinvestment is applied in several countries as a tool for containing health care expenditures and identifying obsolete technologies/ineffective interventions. Clinicians' resistance to change and industries' opposition are recognized as the most important barriers to the implementation of disinvestment policies. Potential targets of disinvestment in cancer are seen in diagnostic and therapeutic areas. Conclusion Despite the agreement on fields of waste and of disinvestment policies, operational methods to put disinvestment in place are lacking. Since they should rely on an inclusive assessment of the technology, Health Technology Assessment may represent a good approach. [ABSTRACT FROM AUTHOR]

Background There is still significant uncertainty as to whether market competition raises or lowers clinical quality in publicly funded healthcare systems. We attempted to assess the effects of market competition on inpatient care quality of stroke patients in a retrospective study of the universal single-payer health insurance system in Taiwan. Methods In this 11-year population-based study, we conducted a pooled time-series cross-sectional analysis with a fixed-effects model and the Hausman test approach by utilizing two nationwide datasets: the National Health Insurance Research Database and the National Hospital and Services Survey in Taiwan. Patients who were admitted to a hospital for ischemic or hemorrhagic stroke were enrolled. After excluding patients with a previous history of stroke and those with different types of stroke, 247 379 ischemic and 79 741 hemorrhagic stroke patients were included in our analysis. Four outcome indicators were applied: the in-hospital mortality rate, 30-day post-operative complication rate, 14-day re-admission rate and 30-day re-admission rate. Results Market competition exerted a negative or negligible effect on the medical care quality of stroke patients. Compared to hospitals located in a highly competitive market, in-hospital mortality rates for hemorrhagic stroke patients were significantly lower in moderately (β = –0.05, P < 0.01) and less competitive markets (β = –0.05, P < 0.01). Conversely, the impact of market competition on the quality of care of ischemic stroke patients was insignificant. Conclusions Simply fostering market competition might not achieve the objective of improving the quality of health care. Other health policy actions need to be contemplated. [ABSTRACT FROM AUTHOR]

Background Starting in 2008 recession affected many European countries and especially Greece. Previous studies have reported increases in low birth weight, preterm birth and stillbirth rates in Greece during early crisis. In our study we used data on births from 1980 to 2014 that allowed us to distinguish recent changes, which could possibly be attributed to the financial crisis, from long term trends, and controlled for maternal age and country of origin as potential confounders. Our study covered a longer period (up to 2014) than what has been studied before and looked separately at the effect of early and established crisis. Methods We used national vital statistics data from 1980 to 2014. We performed age standardization and calculated age standardized rates and standardized rate ratios (SRRs) for perinatal factors for three time periods (pre-crisis, early crisis and established crisis) for Greek and non-Greek women. Results We found an increase in low birth weight deliveries independent of maternal age and origin and an increased stillbirth rate in Greek women younger than 25 in early (RR = 1.42 95%CI: 1.12–1.80) and established crisis periods (RR = 1.36 95%CI: 1.07–1.72) compared with pre-crisis. Non-Greek women have also been affected, with their advantage regarding birth outcomes becoming less profound in the established crisis period (low birth weight: established crisis SRR = 0.84 95%CI: 0.82–0.87, pre-crisis SRR = 0.79 95% CI: 0.76– 0.81). Conclusions The financial crisis has possibly adversely affected perinatal factors in Greece. Our results highlight the need of appropriate public health interventions and family support policies, especially for younger people, unemployed and immigrants. [ABSTRACT FROM AUTHOR]

Numerous tectonic scenarios have been proposed for terrane growth and accretion within the Archean Dharwar Craton, southern Peninsular India. Previously accepted interpretations involving a two-terrane model—comprising a Western Dharwar Craton (WDC) and Eastern Dharwar Craton (EDC) block—have invoked west-dipping subduction and ocean closure, leading to arc magmatism and accretionary orogeny in the WDC, followed by metamorphic overprinting and collisional orogeny in the EDC. However, recent field investigations have revealed the existence of a previously unrecognized 'central' block (Central Dharwar Craton; CDC) within the craton, which requires revision of this model and reinterpretation of metamorphic and magmatic age data. Five samples of high-pressure, upper amphibolite- and granulite-facies meta-igneous and metasedimentary rocks from the southern portion of the Chitradurga Suture Zone, which divides the WDC and CDC, record minimum peak metamorphic conditions of ∼820–875°C at ∼10 kbar, indicating equilibration at the base of thickened continental crust. U–Pb zircon and Pb–Pb monazite geochronology indicates crystallization of parent mafic magmas at c. 2·61–2·51 Ga and subsequent regional metamorphism of these intrusions to garnet-amphibolite and garnet-granulite facies at c. 2·48–2·44 Ga, bracketing the timing of microblock accretion to the Archean–Proterozoic boundary. Light rare earth element enrichment within these zircon grains indicates magma generation in a suprasubduction-zone environment. In addition, detrital magmatic zircon grains with ages of c. 3·10–3·03 Ga and c. 2·97–2·86 Ga imply contamination of these magmas with Mesoarchean material sourced from the Western Dharwar Craton continental nucleus. Comparison of these metamorphic and magmatic age data with those recorded in the EDC shows that westward-directed subduction is implausible, and that all three terranes (the WDC, CDC, and EDC) must have accreted synchronously, driven by two separate eastward-dipping ocean–continent convergent plate margins. These data further support a recent abundance of observations from the geological record supporting the hypothesis that subduction-driven plate tectonics had initiated on Earth before c. 2·5 Ga, as opposed to a Neoproterozoic onset (c. 0·8–0·9 Ga) reported by numerous studies. [ABSTRACT FROM AUTHOR]

Accumulating evidence suggests that long non-coding RNA (lncRNA) plays important roles in some malignant tumors. However, the mechanism underlying how lncRNA regulates hepatocellular carcinoma (HCC) process remains largely unknown. In this study, we explored the potential role of lncRNA 00607 as a novel tumor suppressor in HCC. In this study, we examined the regulation of lncRNA 00607 by the important inflammatory cytokine tumor necrosis factor-α (TNF-α) and interleukin-6 (IL-6). We also determined the expression of LINC000607 in 159 HCC tumors and paired adjacent tissues. Effects of LINC000607 in HCC proliferation and apoptosis were examined in vitro in HCC cell lines and in vivo tumor xenografts. Furthermore, we also examine underlying mechanism by which lncRNA 00607 regulates NF-κB p65 and how LIN00607 exerts its tumor suppressor role in HCC. We found that lncRNA 00607 expression level is lower in HCC tumors compared with matched normal liver tissue, and its low expression predicts worse prognosis in HCC. Functionally, lncRNA 00607 overexpression leads to decreased HCC cell proliferation in vitro and in vivo, enhanced apoptosis and chemotherapeutic drug sensitivity. Mechanistically, lncRNA 00607 inhibits the p65 transcription by binding to the p65 promoter region, therefore contributing to increased p53 levels in HCC. Taken together, the findings of this study show that the TNF-α/IL-6-lncRNA 00607-NF-κB p65/p53 signaling axis represents a novel therapeutic avenue in cancer chemotherapy. [ABSTRACT FROM AUTHOR]

Buckwheat (Fagopyrum esculentum Moench) shows high tolerance to aluminum (Al) toxicity, but the molecular mechanisms underlying its high Al tolerance are poorly understood. Here, we functionally characterized two genes (FeSTAR1 and FeSTAR2), which encode a nucleotide-binding domain and a membrane domain, respectively, of a bacterial-type ATP-binding cassette (ABC) transporter. The expression of FeSTAR1 and FeSTAR2 was induced by Al in both roots and leaves with higher expression in the roots. Spatial and tissue-specific expression analysis showed that the Al-induced expression of these two genes was found in both the root tips and basal root regions with higher expression in the root outer cell layers. The expression was neither induced by other metals including Cd and La nor by low pH and phosphorus-deficiency. FeSTAR1 and FeSTAR2 were present in a single copy in the genome, but the Al-induced transcript copy number of FeSTAR1 and FeSTAR2 was much higher than their homologous genes in rice and Arabidopsis. FeSTAR1 and FeSTAR2 form a complex when co-expressed in onion epidermal cells. Introduction of FeSTAR1 and FeSTAR2 into Arabidopsis mutants atstar1 and als3 / atstar2, respectively, rescued the sensitivity of the mutants to Al. Taken together, our results indicate that FeSTAR1 and FeSTAR2 are involved in Al tolerance and that their high expression level may contribute to high Al tolerance in buckwheat. [ABSTRACT FROM AUTHOR]

The responses of pepper (Capsicum annuum) plants to inoculation with the pathogenic bacterium Ralstonia solanacearum and to high-temperature-high-humidity (HTHH) conditions were previously found to be coordinated by the transcription factors CaWRKY6 and CaWRKY40 ; however, the underlying molecular mechanism was unclear. Herein, we identified and functionally characterized CaHsfB2a, a nuclear-localized heat shock factor involved in pepper immunity to R. solanacearum inoculation (RSI) and tolerance to HTHH. CaHsfB2a is transcriptionally induced in pepper plants by RSI or HTHH and by exogenous application of salicylic acid (SA), methyl jasmonate (MeJA), ethylene (ETH), or abscisic acid (ABA). Virus-induced gene silencing (VIGS) of CaHsfB2a significantly impaired pepper immunity to RSI, hampered HTHH tolerance, and curtailed expression of immunity- and thermotolerance-associated marker genes such as CaHIR1, CaNPR1, CaABR1, and CaHSP24. Likewise, transient overexpression of CaHsfB2a in pepper leaves induced hypersensitive response (HR)-like cell death and H2O2 accumulation and upregulated the above-mentioned marker genes as well as CaWRKY6 and CaWRKY40. Chromatin immunoprecipitation (ChIP) and microscale thermophoresis (MST) analysis revealed that CaHsfB2a bound the promoters of both CaWRKY6 and CaWRKY40. In a parallel experiment, we determined by ChIP-PCR and MST that CaHsfB2a was regulated directly by CaWRKY40 but indirectly by CaWRKY6. Cumulatively, our results suggest that CaHsfB2a positively regulates plant immunity against RSI and tolerance to HTHH, via transcriptional cascades and positive feedback loops involving CaWRKY6 and CaWRKY40. [ABSTRACT FROM AUTHOR]

Background: A perfect smile is dictated by the balance among 3 parameters: the white (teeth), the pink (gum), and the lips: excessive gingival display while smiling has been a cause of esthetic embarrassment for many patients, thus affecting their psychosocial behavior. With respect to different etiologies, treatment of gummy smile must be properly planned: treatment options include facial surgery, oral surgery, or laser.Objectives: Given the growing demand for less invasive techniques and observed complications secondary to botulinum toxin injection, we present a novel treatment option aimed at correcting gummy smile using hyaluronic acid injection and review the published techniques and the anatomy of the involved facial muscles.Methods: The treatment was performed by infiltration in the paranasal area, in the location of the most cranial portion of the nasojugal fold, about 3 mm lateral to the alar cartilage wing, according to a vector perpendicular to the cutaneous plane, to gently compress the lateral fibers of the levator labii superioris alaeque nasi without invading it. A Vycross® technology filler was used for all the treatments.Results: All patients had an immediate improvement, with a maximum duration ranging from 186 to 240 days (mean, 213 days), according to parameters of the Global Aesthetic Improvement Scale (GAIS 4.06).Conclusions: This new, less invasive and safer technique to correct dynamic excessive gingival display was shown to be feasible and safe with a long-lasting result. This treatment could be a novel effective option for experienced injectors to treat aesthetic facial flaws.Level of Evidence4: [ABSTRACT FROM AUTHOR]

The evolution of reproductive isolation following hybridization is a major obstacle that may limit the prevalence of hybrid speciation among specific groups of organisms. Here, we use a flea beetle system to offer a behavioral hypothesis for why there are so few examples of homoploid hybrid speciation among insects. Specifically, we examined cuticular hydrocarbon (CHC) mating signals and mate-choice decisions of Altica fragariae and A. viridicyanea to test whether the signals produced by hybrids cause prezygotic reproductive isolation. Although hybrids of A. fragariae and A. viridicyanea had unique CHC profiles as compared to the parental species, mate-choice trials indicated that these differences were insufficient to prevent gene flow between hybrids and parental species. We found that mate-choice decisions and CHC signals were not correlated. Considering the ubiquity of CHC signaling molecules in insects, we propose that decoupling of CHC signals and mate choice may be a general mechanism limiting hybrid speciation in insects. [ABSTRACT FROM AUTHOR]

Ineffective hunters in cooperative foraging groups may be shielded from natural selection by their more effective group mates, whereas those living solitarily would starve and thus be removed from the population. The problem may be exacerbated in large groups where it may be easier for individuals to withhold participation. Group foragers may thus be ineffective individual hunters or exhibit greater inter-individual variation in hunting abilities, in particular, when living in large groups. We test these hypotheses in spider species of the genus Anelosimus that differ in their level of sociality and, among social species, in colonies of different sizes. We found that individuals from the more social species, and those from larger groups, reacted more slowly to prey than those from solitary species or small groups. Individuals from these categories also had greater inter-individual variation in reaction times. Individuals from large social groups also had lower prey-capture success than those from small ones. These differences may have been driven by the size of the group from which the social individuals were taken, as those from small colonies behaved similarly to individuals of the 2 less social species. This finding suggests that hunting ability may develop as a phenotypically plastic trait. [ABSTRACT FROM AUTHOR]

Learning associations between food-related stimuli and nutrients allows foragers to collect resources efficiently. In turn, the nutrients that foragers consume can themselves affect learning performance, through innate preferences for pre-ingestive stimuli, as well as post-ingestive reinforcement. Bees are insect models of learning and memory, yet the vast majority of this research concerns nectar (carbohydrate) rather than pollen (protein/lipid) rewards, despite the fact that many bees collect both simultaneously. We asked how one component of pollen surface chemistry, a free fatty acid (oleic acid), affected bees' performance in a nectar-learning task. We found that ingestion of oleic acid enhanced visual learning, likely through positive post-ingestive reinforcement. This was supported by our finding that although bees did not prefer to consume the oleic acid solution, its ingestion both decreased motor activity and increased survival. These results are a step towards understanding how nutritionally complex floral rewards may affect cognitive processes that underlie pollination mutualisms. [ABSTRACT FROM AUTHOR]

Non-structural carbohydrates (NSC) play a central role in plant functioning as energy carriers and building blocks for primary and secondary metabolism. Many studies have investigated how environmental and anthropogenic changes, like increasingly frequent and severe drought episodes, elevated CO2and atmospheric nitrogen (N) deposition, influence NSC concentrations in individual trees. However, this wealth of data has not been analyzed yet to identify general trends using a common statistical framework. A thorough understanding of tree responses to global change is required for making realistic predictions of vegetation dynamics. Here we compiled data from 57 experimental studies on 71 tree species and conducted a meta-analysis to evaluate general responses of stored soluble sugars, starch and total NSC (soluble sugars + starch) concentrations in different tree organs (foliage, above-ground wood and roots) to drought, elevated CO2and N deposition. We found that drought significantly decreased total NSC in roots (−17.3%), but not in foliage and above-ground woody tissues (bole, branch, stem and/or twig). Elevated CO2significantly increased total NSC in foliage (+26.2%) and roots (+12.8%), but not in above-ground wood. By contrast, total NSC significantly decreased in roots (−17.9%), increased in above-ground wood (+6.1%), but was unaffected in foliage from N fertilization. In addition, the response of NSC to three global change drivers was strongly affected by tree taxonomic type, leaf habit, tree age and treatment intensity. Our results pave the way for a better understanding of general tree function responses to drought, elevated CO2and N fertilization. The existing data also reveal that more long-term studies on mature trees that allow testing interactions between these factors are urgently needed to provide a basis for forecasting tree responses to environmental change at the global scale. [ABSTRACT FROM AUTHOR]

Many marine organisms have a multi-phase life history and rely on their planktonic larvae for dispersal. Despite the important role of larvae in shaping population distribution and abundance, the chemical, physical, and biological factors that shape larval fate are still not fully understood. Shedding light into this larval dispersal "black box" has become critical in the face of global climate change, primarily due to the importance of larval dispersal in formulating sound conservation and management strategies. Focusing on two major stressors, warming and acidification, we highlight the limitations of the current species-by-species, lab-based study approach, and particularly the lack of consideration of the larval experience along the dispersive pathway. Measuring organismal responses to environmentally relevant climate change stress demands an improved documentation of the physical and biological conditions that larvae experience through ontogeny, which in turn requires updated empirical and theoretical approaches. While there are meaningful between taxa comparisons to be made by larval ecologists, to peek into the dispersal black box and to investigate the larger scale consequences of altered dispersal requires innovative collaborations between ecologists, oceanographers, molecular biologists, statisticians, and mathematicians. [ABSTRACT FROM AUTHOR]

We constrain the oxygen fugacity (⁠ f O 2 ⁠) of strongly peraluminous granites [SPGs; i.e. granites (sensu lato) generated through the partial melting of sediments] across the Archean–Proterozoic boundary, which coincides roughly with the Great Oxygenation Event (GOE), to understand whether secular changes in atmospheric O2 levels may be imprinted on the f O 2 of igneous rocks. SPGs were chosen to maximize the potential effects of sediments in their sources on the f O 2 of the magmas. We studied 28 Archean (2685–2547 Ma) and 31 Meso- to Paleoproterozoic (1885–1420 Ma) geographically distributed samples from North America, spanning two cratons (Superior and Wyoming) and both orogenic and anorogenic Proterozoic provinces (Trans-Hudson Orogen, Wopmay Orogen, and SW USA). We present an analysis of both new and previously published whole-rock major and trace element data and mineral major element chemistry from the samples. All the studied samples are peraluminous high-silica plutonic rocks (all contain >67 wt % SiO2, and 92% are true granites with >69 wt % SiO2), and biotite + muscovite ± garnet ± tourmaline ± sillimanite are the primary aluminous minerals in all samples. Whole-rock major element and trace element abundances of all samples are consistent with derivation by partial melting of aluminous sediments. To constrain the f O 2 of crystallization of the SPGs, we developed an alphaMELTS-based method that takes advantage of the sensitivity of biotite FeT/(FeT + Mg) ratios to f O 2 ⁠. This method is able to reproduce experimental and empirical data where biotite compositions and whole-rock compositions, pressures and temperatures of crystallization and f O 2 are known. For the SPGs in this study, alphaMELTS modeling indicates that 68% of Proterozoic samples crystallized at an f O 2 between NNO –1 and NNO +1·1 (where NNO is nickel–nickel oxide buffer), whereas the remaining Proterozoic samples (32%) and most of the Archean samples (75%) crystallized at ≤NNO –2. The simplest explanation of these results is that the Proterozoic SPGs were derived from metasedimentary source rocks that on average had more oxidized bulk redox states relative to their Archean counterparts. The bulk redox state of the metasedimentary source rocks of SPGs of all ages is defined by the relative abundances of oxidized (e.g. Fe3+ and S6+) and reduced (e.g. organic matter) material. The crystallization of both Archean and Proterozoic samples at f O 2 values of ≤NNO –2 is consistent with them having their f O 2 buffered by graphite (formed from organic carbon) in their source regions. However, the dominantly low f O 2 (≤NNO –2) values of the Archean SPGs plausibly reflects the presence of organic material and relatively reduced metasedimentary rocks in their source region prior to the GOE. In contrast, the elevated f O 2 values of the majority of the Proterozoic SPGs may reflect enhanced sulfate contents or increased Fe3+/FeT in sediments after the GOE, which, in terms of the bulk redox state of their metasedimentary source region, would have offset the reducing nature of organic matter present there. [ABSTRACT FROM AUTHOR]

Aim To examine dual trajectories of anxiety/depression symptoms and alcohol use among drug-using youth seeking care from an urban emergency department (ED), their baseline correlates and co-occurring trajectories of severe violence. Short summary There were five characteristic dual trajectories of alcohol use and depression/anxiety symptoms. Community violence exposure was highest among individuals with high-depression/anxiety symptom trajectories. Individuals with concurrently high-alcohol use and depression/anxiety symptom trajectories reported that the most delinquent peer affiliations, and had the highest rates of severe violence over time. Methods We analyzed data from 599 drug-using (primarily marijuana) youth ages 14–24 (349 assault-injured) recruited from December 2009 to September 2011 into a 24-month longitudinal study at a Level-1 ED in Flint, Michigan. Youth self-reported substance use, depression and anxiety symptoms, peer/parental behaviors, and severe violence involvement at baseline and four biannual follow-up assessments. Bivariate latent trajectory models identified homogeneous groups with similar trajectories on alcohol use and anxiety/depression symptoms; we compared baseline characteristics of each trajectory group and concurrent trajectories of severe violence (victimization and aggression). Results Our model identified five trajectory groups: Low drinking/No symptoms (LN; 10.4%; n = 62), No drinking/Moderate symptoms (NM; 15.7%; n = 94), Low drinking/Moderate symptoms (LM; 30.2%; n = 181), Low drinking/High symptoms (LH; 16.4%; n = 98) and High drinking/High symptoms (HH; 27.5%; n = 164). The HH group was characterized by more delinquent peer associations, and rates of community violence were higher among the high symptom groups. The HH group had the highest severe violence perpetration and victimization rates across time points; the LH group had similar violence rates to the LM and NM groups and the LN group had the lowest violence rates across time. Conclusions Among drug-using youth, alcohol use interventions could benefit from a focus on peer influences, and those with a joint focus on violence involvement may be improved via inclusion of content related to mental health and community violence exposure. [ABSTRACT FROM AUTHOR]

Background Although increasing frailty is predictive of increased mortality and length of stay for hospitalized older adults, this approach ignores health assets that individuals can utilize to recover following hospital admission. Aim To examine whether health assets mitigate the effect of frailty on outcomes for older adults admitted to hospital. Design Patients of 1418 aged ≥ 70 years admitted to 11 hospitals in Australia were evaluated at admission using the interRAI assessment system for Acute Care, which surveys a large number of domains, including cognition, communication, mood and behaviour, activities of daily living, continence, nutrition, skin condition, falls and medical diagnosis. Methods The data set was interrogated for potential health assets and a multiple logistic regression adjusted for frailty index, age and gender as covariates was performed for the outcomes mortality, length of stay, re-admission and new need for residential care. Results Inpatient mortality was 3% and 4.5% of patients died within 28 days of discharge. Median length of stay was 7 days (IQR 4–11). In multivariate analysis that includes frailty, being able to walk further [OR 0.08 (0.01–0.63)], ability to leave the house [OR 0.35 (0.17–0.74)] and living alone [OR 0.28 (0.10–0.79)] were protective against mortality. The presence of a support person was associated with a decreased length of stay [OR 0.14 (0.08–0.25)]. Conclusion The inclusion of health assets in predictive models can improve prognostication and highlights potential interventions to improve outcomes for hospitalized older adults. [ABSTRACT FROM AUTHOR]