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https://www.readbyqxmd.com/read/28535593/simulating-soil-organic-carbon-stock-as-affected-by-land-cover-change-and-climate-change-hyrcanian-forests-northern-iran
#1
Azam Soleimani, Seyed Mohsen Hosseini, Ali Reza Massah Bavani, Mostafa Jafari, Rosa Francaviglia
Soil organic carbon (SOC) contains a considerable portion of the world's terrestrial carbon stock, and is affected by changes in land cover and climate. SOC modeling is a useful approach to assess the impact of land use, land use change and climate change on carbon (C) sequestration. This study aimed to: (i) test the performance of RothC model using data measured from different land covers in Hyrcanian forests (northern Iran); and (ii) predict changes in SOC under different climate change scenarios that may occur in the future...
May 19, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28535588/pedogenic-knowledge-aided-modelling-of-soil-inorganic-carbon-stocks-in-an-alpine-environment
#2
Ren-Min Yang, Fan Yang, Fei Yang, Lai-Ming Huang, Feng Liu, Jin-Ling Yang, Yu-Guo Zhao, De-Cheng Li, Gan-Lin Zhang
Accurate estimation of soil carbon is essential for accounting carbon cycling on the background of global environment change. However, previous studies made little contribution to the patterns and stocks of soil inorganic carbon (SIC) in large scales. In this study, we defined the structure of the soil depth function to fit vertical distribution of SIC based on pedogenic knowledge across various landscapes. Soil depth functions were constructed from a dataset of 99 soil profiles in the alpine area of the northeastern Tibetan Plateau...
May 19, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28535530/mathematical-model-of-potassium-profiling-in-chronic-dialysis
#3
Mauro Ursino, Gabriele Donati
Potassium balance is a difficult task in hemodialysis: low potassium in the dialysate is associated with a high risk of sudden cardiac death, whereas excessive dialysate potassium may provoke insufficient removal and hyperkalemia. A better understanding of the problem can be achieved with the use of mathematical models of solute kinetics. This study is aimed at presenting an improved model of solute kinetics and fluid shifts during hemodialysis. It comprises a 2-compartment (intracellular and extracellular) description of sodium, potassium, and urea, including volume fluid shifts induced by osmotic forces...
2017: Contributions to Nephrology
https://www.readbyqxmd.com/read/28535507/cardiac-cell-therapies-for-the-treatment-of-acute-myocardial-infarction-a-meta-analysis-from-mouse-studies
#4
Cajetan Immanuel Lang, Markus Wolfien, Anne Langenbach, Paula Müller, Olaf Wolkenhauer, Arash Yavari, Hüseyin Ince, Gustav Steinhoff, Bernd Joachim Krause, Robert David, Änne Glass
AIMS: Stem cell-based regenerative therapies for the treatment of ischemic myocardium are currently a subject of intensive investigation. A variety of cell populations have been demonstrated to be safe and to exert some positive effects in human Phase I and II clinical trials, however conclusive evidence of efficacy is still lacking. While the relevance of animal models for appropriate pre-clinical safety and efficacy testing with regard to application in Phase III studies continues to increase, concerns have been expressed regarding the validity of the mouse model to predict clinical results...
May 25, 2017: Cellular Physiology and Biochemistry
https://www.readbyqxmd.com/read/28535470/pharmacophore-guided-discovery-of-small-molecule-interleukin-15-inhibitors
#5
Barbara Żyżyńska-Granica, Bartosz Trzaskowski, Szymon Niewieczerzał, Sławomir Filipek, Oliwia Zegrocka-Stendel, Małgorzata Dutkiewicz, Piotr Krzeczyński, Magdalena Kowalewska, Katarzyna Koziak
Upregulation of interleukin 15 (IL-15) contributes directly i.a. to the development of inflammatory and autoimmune diseases. Selective blockade of IL-15 aimed to treat rheumatoid arthritis, psoriasis and other IL-15-related disorders has been recognized as an efficient therapeutic method. The aim of the study was to identify small molecules which would interact with IL-15 or its receptor IL-15Rα and inhibit the cytokine's activity. Based on the crystal structure of IL-15Rα·IL-15, we created pharmacophore models to screen the ZINC database of chemical compounds for potential IL-15 and IL-15Rα inhibitors...
May 12, 2017: European Journal of Medicinal Chemistry
https://www.readbyqxmd.com/read/28535457/age-of-first-drunkenness-and-risks-for-all-cause-mortality-a-27-year-follow-up-from-the-epidemiologic-catchment-area-study
#6
Hui Hu, William W Eaton, James C Anthony, Li-Tzy Wu, Linda B Cottler
BACKGROUND: Early-onset drunkenness is associated with an increased risk of developing an alcohol use disorder (AUD), which predicts excess mortality risk. Here, we estimated mortality risk for drinkers with and without early drunkenness. METHODS: For 14,848 adult participants interviewed about drinking, drunken episodes, and AUD in 1981-83 for the Epidemiologic Catchment Area in New Haven (Connecticut), Baltimore (Maryland), St. Louis (Missouri), and Durham (North Carolina), we linked National Death Index records through 2007...
May 17, 2017: Drug and Alcohol Dependence
https://www.readbyqxmd.com/read/28535442/mining-for-osteogenic-surface-topographies-in-silico-design-to-in%C3%A2-vivo-osseo-integration
#7
Frits F B Hulshof, Bernke Papenburg, Aliaksei Vasilevich, Marc Hulsman, Yiping Zhao, Marloes Levers, Natalie Fekete, Meint de Boer, Huipin Yuan, Shantanu Singh, Nick Beijer, Mark-Anthony Bray, David J Logan, Marcel Reinders, Anne E Carpenter, Clemens van Blitterswijk, Dimitrios Stamatialis, Jan de Boer
Stem cells respond to the physicochemical parameters of the substrate on which they grow. Quantitative material activity relationships - the relationships between substrate parameters and the phenotypes they induce - have so far poorly predicted the success of bioactive implant surfaces. In this report, we screened a library of randomly selected designed surface topographies for those inducing osteogenic differentiation of bone marrow-derived mesenchymal stem cells. Cell shape features, surface design parameters, and osteogenic marker expression were strongly correlated in vitro...
May 12, 2017: Biomaterials
https://www.readbyqxmd.com/read/28535410/effect-of-enzyme-inhibition-on-perampanel-pharmacokinetics-why-study-design-matters
#8
Barry E Gidal, Rama Maganti, Antonio Laurenza, Haichen Yang, David A Verbel, Edgar Schuck, Jim Ferry
OBJECTIVES: Perampanel, a selective, noncompetitive AMPA receptor antagonist, is indicated as adjunctive therapy for the treatment of partial seizures with or without secondarily generalized seizures and primary generalized tonic-clonic seizures in patients with epilepsy aged 12years and older. In vitro studies and Phase I trials indicate that perampanel is metabolized almost exclusively by CYP3A, with an elimination half-life (t1/2) averaging approximately 105h. Understanding of pharmacokinetic (PK) interactions-enzyme inhibition or induction-and anticipating their occurrence are important for management of patients with epilepsy...
April 26, 2017: Epilepsy Research
https://www.readbyqxmd.com/read/28535404/placental-inflammation-and-its-relationship-to-cervicovaginal-fetal-fibronectin-in-preterm-birth
#9
Laura van der Krogt, Alexandra E Ridout, Paul T Seed, Andrew H Shennan
OBJECTIVE: Late miscarriage and preterm birth are frequently thought to be associated with inflammation and infection, although in most cases the underlying cause of early delivery remains unknown. The placenta is the organ that links mother and fetus during pregnancy, and postnatal examination may provide useful information about pathophysiology. The relationship between placental pathological lesions and predictive markers of early delivery has not been explored. We sought to characterize preterm deliveries according to placental pathology and relate these to the performance of reliable predictive markers, fetal fibronectin and cervical length...
May 3, 2017: European Journal of Obstetrics, Gynecology, and Reproductive Biology
https://www.readbyqxmd.com/read/28535403/the-predictive-effect-of-inflammatory-markers-and-lipid-accumulation-product-index-on-clinical-symptoms-associated-with-polycystic-ovary-syndrome-in-nonobese-adolescents-and-younger-aged-women
#10
Esra Nur Tola, Serenat Eris Yalcin, Nadiye Dugan
OBJECTIVE(S): The aim of our study is to analyse the inflammatory markers and lipid accumulation product (LAP) index in nonobese adolescents and younger aged women with polycystic ovary syndrome (PCOS) compared with age and body mass index (BMI)-matched healthy controls and to determine whether the investigated parameters are potential markers for the etiopathogenesis of PCOS. We also aim to determine whether these inflammatory markers are predictive for developing some clinical implications, such as cardiovascular disease (CVD) and insulin resistance (IR), associated with PCOS...
May 15, 2017: European Journal of Obstetrics, Gynecology, and Reproductive Biology
https://www.readbyqxmd.com/read/28535399/dry-skin-and-pressure-ulcer-risk-a-multi-center-cross-sectional-prevalence-study-in-german-hospitals-and-nursing-homes
#11
Anna Lechner, Nils Lahmann, Konrad Neumann, Ulrike Blume-Peytavi, Jan Kottner
BACKGROUND: Pressure ulcers are a serious health problem in medical and nursing care. Therefore, effective prevention is crucial. Major pressure ulcer risk factors have been identified but the particular role of dry skin (xerosis cutis) is unclear. OBJECTIVES: To investigate possible associations between dry skin and pressure ulcers focusing on the sacrum/trochanter and at heel/ankle skin areas. DESIGN: Two multicenter cross-sectional studies...
May 18, 2017: International Journal of Nursing Studies
https://www.readbyqxmd.com/read/28535297/antihypertensive-adherence-trajectories-among-older-adults-in-the-first-year-after-initiation-of-therapy
#12
Jennifer L Hargrove, Virginia Pate, Carri H Casteel, Yvonne M Golightly, Laura R Loehr, Stephen W Marshall, Til Stürmer
BACKGROUND: Adherence to antihypertensives is suboptimal, but previous methods of quantifying adherence fail to account for varying patterns of use over time. We sought to improve classification of antihypertensive adherence using group-based trajectory models, and to determine whether individual factors predict adherence trajectories. METHODS: We identified older adults initiating antihypertensive therapy during 2008-2011 using a 20% sample of Medicare (federal health insurance available to US residents over the age of 65) beneficiaries enrolled in parts A (inpatient services), B (outpatient services), and D (prescription medication)...
May 23, 2017: American Journal of Hypertension
https://www.readbyqxmd.com/read/28535264/the-impact-of-the-physical-environment-on-depressive-symptoms-of-older-residents-living-in-care-homes-a-mixed-methods-study
#13
Rachel Potter, Bart Sheehan, Rebecca Cain, James Griffin, Paul A Jennings
Background and Objectives: Forty percent of residents living in care homes in the United Kingdom have significant depressive symptoms. Care homes can appear to be depressing places, but whether the physical environment of homes directly affects depression in care home residents is unknown. This study explores the relationship between the physical environment and depressive symptoms of older people living in care homes. Research Design and Methods: In a prospective cohort study the physical environment of 50 care homes were measured using the Sheffield Care Environment Assessment Matrix (SCEAM) and depressive symptoms of 510 residents measured using the Geriatric Depression Scale (GDS-15)...
May 23, 2017: Gerontologist
https://www.readbyqxmd.com/read/28535199/genotype-phenotype-correlation-in-patients-with-isovaleric-acidemia-comparative-structural-modelling-and-computational-analysis-of-novel-variants
#14
Osama K Zaki, George Priya Doss C, Salsabil A Ali, Ghadeer G Murad, Shaima A Elashi, Maryam Sa Ebnou, D Thirumal Kumar, Ola Khalifa, Radwa Gamal, Heba S A El Abd, Bilal N Nasr, Hatem Zayed
Isovaleric acidemia (IVA) is an autosomal recessive inborn error of leucine metabolism. It is caused by a deficiency in the mitochondrial isovaleryl-CoA dehydrogenase (IVD) enzyme. In this study, we investigated eight patients with IVA. The patients diagnoses were confirmed by urinary organic acid analysis and the blood C5-Carnitine value. A molecular genetic analysis of the IVD gene revealed nine different variants: five were missense variants (c.1193G>A; p. R398Q, c.1207T>A; p. Y403N, c.872C>T; p...
May 23, 2017: Human Molecular Genetics
https://www.readbyqxmd.com/read/28535189/predicting-accurate-contacts-in-thousands-of-pfam-domain-families-using-pconsc3
#15
Mirco Michel, Marcin J Skwark, David Menéndez Hurtado, Magnus Ekeberg, Arne Elofsson
Motivation: A fewyears ago it was shown that by using amaximumentropy approach to describe couplings between columns in a multiple sequence alignment it is possible to significantly increase the accuracy of residue contact predictions. For very large protein families with more than 1000 effective sequences the accuracy is sufficient to produce accurate models of proteins as well as complexes. Today, for about half of all Pfam domain families no structure is known, but unfortunately most of these families have at most a few hundred members, i...
May 23, 2017: Bioinformatics
https://www.readbyqxmd.com/read/28535146/role-of-spatial-inhomogenity-in-gpcr-dimerisation-predicted-by-receptor-association-diffusion-models
#16
Sneha A Deshpande, Aiswarya B Pawar, Anish Dighe, Chaitanya A Athale, Durba Sengupta
G protein-coupled receptor (GPCR) association is an emerging paradigm with far reaching implications in the regulation of signalling pathways and therapeutic interventions. Recent super resolution microscopy studies have revealed that receptor dimer steady state exhibits sub-second dynamics. In particular the GPCRs, muscarinic acetylcholine receptor M1 (M1MR) and formyl peptide receptor (FPR), have been demonstrated to exhibit a fast association/dissociation kinetics, independent of ligand binding. In this work, we have developed a spatial kinetic Monte Carlo model to investigate receptor homo-dimerisation at a single receptor resolution...
May 23, 2017: Physical Biology
https://www.readbyqxmd.com/read/28535127/modelling-virus-coinfection-to-inform-management-of-maize-lethal-necrosis-in-kenya
#17
Frank Hilker, Linda Allen, Vrushali Bokil, Cheryl Briggs, Zhilan Feng, Karen A Garrett, Louis Gross, Frédéric Hamelin, Michael J Jeger, Carrie Manore, Alison Power, Margaret Redinbaugh, Megan Rúa, Nik J Cunniffe
Maize lethal necrosis (MLN) has emerged as a serious threat to food security in sub-Saharan Africa. MLN is caused by coinfection with two viruses, maize chlorotic mottle virus (MCMV) and a potyvirus, often sugarcane mosaic virus (SCMV). To better understand dynamics of MLN and to provide insight into disease management, we model the spread of the viruses causing MLN within and between growing seasons. The model allows for transmission via vectors, soil and seeds, as well as exogenous sources of infection. Following model parameterisation, we predict how management affects disease prevalence and crop performance over multiple seasons...
May 23, 2017: Phytopathology
https://www.readbyqxmd.com/read/28535108/the-effects-of-occupational-stress-work-centrality-self-efficacy-and-job-satisfaction-on-intent-to-quit-among-long-term-care-workers-in-korea
#18
Jeongkyu Park, Seokwon Yoon, Sung Seek Moon, Kyoung Hag Lee, Jueun Park
A large and growing elderly Koreans with chronic conditions necessitates an increase in long-term care. This study is aimed at investigating the effects of occupational stress, work-centrality, self-efficacy, and job satisfaction on intent to leave among long-term care workers in Korea. We tested hypothesized structural equation model predicting the intention to quit among long-term care workers in Korea. Survey data were collected from 532 long-term care workers in Seoul, Korea. Results showed that occupational stress was positively associated with intention to leave the job...
May 23, 2017: Home Health Care Services Quarterly
https://www.readbyqxmd.com/read/28535053/the-origin-of-ion-pairing-and-redissociation-of-ionic-liquid
#19
Bong-Seop Lee, Shiang-Tai Lin
We address the possible occurrence of a minimum extent of dissociation (α) of ionic liquid (IL) in IL-solvent mixtures. This phenomenon, known as the re-dissociation of IL, is responsible for many interesting composition-dependent properties in such mixtures. A predictive thermodynamic model is developed to provide semi-quantitative description on the change of α with solvent concentration. It is found that the occurrence of minimum α coincides with the occurrence maximum mean activity coefficient of dissociated ions, indicating better solvation of free, dissociated ions both with decreasing and increasing solvent concentration...
May 23, 2017: Journal of Physical Chemistry. B
https://www.readbyqxmd.com/read/28535043/identification-and-quantification-of-acylated-homoserine-lactones-in-shewanella-baltica-the-specific-spoilage-organism-of-pseudosciaena-crocea-by-ultra-high-performance-liquid-chromatography-coupled-to-triple-quadrupole-mass-spectrometry
#20
Yanbo Wang, Xiaoxiao Zhang, Chong Wang, Linglin Fu, Yanyao Yi, Yan Zhang
Bacteria communicate with one another using chemical signal molecules called autoinducers, and the most prevalent autoinducers used by Gram-negative bacteria are N-acylated homoserine lactones (AHLs). However, AHLs are hardly detected in Shewanella baltica, the specific spoilage organism of Pseudosciaena crocea. In this study, we applied ultra-high-performance liquid chromatography coupled to triple quadrupole tandem mass spectrometry (UHPLC-QqQ-MS/MS) to determine AHLs. This method enabled the quantification of up to 11 AHLs within 5...
May 23, 2017: Journal of Agricultural and Food Chemistry
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