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https://www.readbyqxmd.com/read/29779177/computational-identification-of-structural-factors-affecting-the-mutagenic-potential-of-aromatic-amines-study-design-and-experimental-validation
#1
Svetoslav H Slavov, Iva Stoyanova-Slavova, William Mattes, Richard D Beger, Beat J Brüschweiler
A grid-based, alignment-independent 3D-SDAR (three-dimensional spectral data-activity relationship) approach based on simulated 13 C and 15 N NMR chemical shifts augmented with through-space interatomic distances was used to model the mutagenicity of 554 primary and 419 secondary aromatic amines. A robust modeling strategy supported by extensive validation including randomized training/hold-out test set pairs, validation sets, "blind" external test sets as well as experimental validation was applied to avoid over-parameterization and build Organization for Economic Cooperation and Development (OECD 2004) compliant models...
May 19, 2018: Archives of Toxicology
https://www.readbyqxmd.com/read/29778838/changes-in-cell-wall-pectins-and-their-relation-to-postharvest-mesocarp-softening-of-hass-avocados-persea-americana-mill
#2
Bruno G Defilippi, Troy Ejsmentewicz, María Paz Covarrubias, Orianne Gudenschwager, Reinaldo Campos-Vargas
The avocado is a climacteric fruit and begins a softening process after harvest. During ripening, the mesocarp changes in texture, and this affects fruit quality and cold storage capacity. Softening is commonly associated with cell wall disassembly in climacteric fruits. However, changes in the cell wall structure and composition during avocado softening are poorly understood. To understand this process, cell wall pectins in "Hass" avocado fruit were studied during ripening at 20 °C after harvest and after cold storage...
May 17, 2018: Plant Physiology and Biochemistry: PPB
https://www.readbyqxmd.com/read/29778604/structural-basis-for-the-interaction-of-mutasome-assembly-factor-rev1-with-ubiquitin
#3
Gaofeng Cui, Maria Victoria Botuyan, Georges Mer
REV1 is an evolutionarily conserved Translesion synthesis (TLS) DNA polymerase and an assembly factor key for the recruitment of other TLS polymerases to DNA damage sites. REV1-mediated recognition of ubiquitin in the proliferative cell nuclear antigen (PCNA) is thought to be the trigger for TLS activation. Here we report the solution nuclear magnetic resonance (NMR) structure of a 108-residue fragment of human REV1 encompassing the two putative ubiquitin-binding motifs UBM1 and UBM2 in complex with ubiquitin...
May 17, 2018: Journal of Molecular Biology
https://www.readbyqxmd.com/read/29778534/fibroblast-growth-factor-19-protects-the-heart-from-oxidative-stress-induced-diabetic-cardiomyopathy-via-activation-of-ampk-nrf2-ho-1-pathway
#4
Xin Li, Di Wu, Ye Tian
Diabetes affects cardiac structure and function, where it leads to diabetic cardiomyopathy. Reactive oxygen species (ROS) produced by oxidative stress play an important role in the development of diabetic cardiomyopathy. Fibroblast growth factor (FGF) 19, an enterokine, is synthesized and released into the ileum. In the present study, we revealed that FGF19 induced an antioxidant response through stimulating the expression of nuclear erythroid factor 2 (NE-F2)-related factor 2 (Nrf2) and as well as reducing ROS production through the AMPK signaling pathway...
May 18, 2018: Biochemical and Biophysical Research Communications
https://www.readbyqxmd.com/read/29778421/comparison-of-two-groups-for-the-apolipoprotein-e-polymorphisms-by-using-next-generation-sequencing-the-first-group-with-three-consecutive-abortions-and-the-second-group-with-at-most-one-abortion-in-three-consecutive-pregnancies
#5
Evren Gumus
The importance of apolipoprotein E genotypes and allelic polymorphisms in the etiology of recurrent miscarriage is controversial. We plan to investigate this in a two-group study involving more than a thousand participants. In total, 1046 subjects (802 participants in the first group, 244 participants in the second group) were investigated. Women in the first group had a history of ≥3 consecutive spontaneous miscarriage and women in the second group had at most one miscarriage in three consecutive pregnancies...
May 17, 2018: Gene
https://www.readbyqxmd.com/read/29778412/assessing-cancer-risk-factors-faced-by-an-ancestral-puebloan-population-in-the-north-american-southwest
#6
Catrina Banks Whitley, Jeffrey L Boyer
Ancestral Puebloan people in the North American Southwest suffered high rates of disease, poor health, and early age-at-death. Four individuals with skeletal expressions of cancer were found in a pre-Columbian population in the Taos Valley - Reports of malignant neoplasms in the archaeological record are uncommon and their presence in four of 82 individuals is a high occurrence. This study continues Whitley and Boyer's (2012) research testing whether concentrations of ionizing radiation were sufficiently high to induce cancer and related health issues...
August 23, 2017: International Journal of Paleopathology
https://www.readbyqxmd.com/read/29778343/community-pharmacy-minor-ailment-services-in-england-pharmacy-stakeholder-perspectives-on-the-factors-affecting-sustainability
#7
Hamde Nazar, Zachariah Nazar
BACKGROUND: Self-care advice and management of minor ailments have long been provided in community pharmacies across England. However, formal pharmacy minor ailment service provision is geographically variable and has yet to gain recognition and political support as a valued sustainable service for nationwide adoption and commissioning. OBJECTIVE: To investigate the sustainability potential of pharmacy minor ailment services from the perspective of community pharmacy stakeholders within the North East of England...
May 14, 2018: Research in Social & Administrative Pharmacy: RSAP
https://www.readbyqxmd.com/read/29778275/quantifying-the-effects-of-16p11-2-copy-number-variants-on-brain-structure-a-multisite-genetic-first-study
#8
Sandra Martin-Brevet, Borja Rodríguez-Herreros, Jared A Nielsen, Clara Moreau, Claudia Modenato, Anne M Maillard, Aurélie Pain, Sonia Richetin, Aia E Jønch, Abid Y Qureshi, Nicole R Zürcher, Philippe Conus, Wendy K Chung, Elliott H Sherr, John E Spiro, Ferath Kherif, Jacques S Beckmann, Nouchine Hadjikhani, Alexandre Reymond, Randy L Buckner, Bogdan Draganski, Sébastien Jacquemont
BACKGROUND: 16p11.2 breakpoint 4 to 5 copy number variants (CNVs) increase the risk for developing autism spectrum disorder, schizophrenia, and language and cognitive impairment. In this multisite study, we aimed to quantify the effect of 16p11.2 CNVs on brain structure. METHODS: Using voxel- and surface-based brain morphometric methods, we analyzed structural magnetic resonance imaging collected at seven sites from 78 individuals with a deletion, 71 individuals with a duplication, and 212 individuals without a CNV...
March 27, 2018: Biological Psychiatry
https://www.readbyqxmd.com/read/29778142/behaviors-and-kinetics-of-toluene-adsorption-desorption-on-activated-carbons-with-varying-pore-structure
#9
Xi Yang, Honghong Yi, Xiaolong Tang, Shunzheng Zhao, Zhongyu Yang, Yueqiang Ma, Tiecheng Feng, Xiaoxu Cui
This work was undertaken to investigate the behaviors and kinetics of toluene adsorption and desorption on activated carbons with varying pore structure. Five kinds of activated carbon from different raw materials were selected. Adsorption isotherms and breakthrough curves for toluene were measured. Langmuir and Freundlich equations were fitted to the equilibrium data, and the Freundlich equation was more suitable for simulating toluene adsorption. The process consisted of monolayer, multilayer and partial active site adsorption types...
May 2018: Journal of Environmental Sciences (China)
https://www.readbyqxmd.com/read/29777994/analysis-of-incidence-mortality-and-survival-for-pancreatic-and-biliary-tract-cancers-across-europe-with-assessment-of-influence-of-revised-european-age-standardisation-on-estimates
#10
Pamela Minicozzi, Tiziana Cassetti, Claudia Vener, Milena Sant
BACKGROUND: Pancreatic (PC) and biliary tract (BTC) cancers have higher incidence and mortality in Europe than elsewhere. We analysed time-trends in PC/BTC incidence, mortality, and survival across Europe. Since the European standard population (ESP) was recently revised to better represent European age structure, we also assessed the effect of adopting the revised ESP to age-standardise incidence and mortality data. METHODS: We analysed PCs/BTCs (≥15 years) diagnosed in 2000-2007 and followed-up to end of 2008, in 29 European countries across five regions: UK/Ireland, and northern, central, southern, and eastern Europe...
May 16, 2018: Cancer Epidemiology
https://www.readbyqxmd.com/read/29777966/determinants-of-choice-of-delivery-place-testing-rational-choice-theory-and-habitus-theory
#11
Anja Broda, Juliane Krüger, Stephanie Schinke, Andreas Weber
OBJECTIVE: The current study uses two antipodal social science theories, the rational choice theory and the habitus theory, and applies these to describe how women choose between intraclinical (i.e., hospital-run birth clinics) and extraclinical (i.e., midwife-led birth centres or home births) delivery places. DESIGN, SETTING, PARTICIPANTS, MEASUREMENTS: Data were collected in a cross-sectional questionnaire-based survey among 189 women. A list of 22 determinants, conceptualized to capture the two theoretical concepts, were rated on a 7-point Likert scale with 1 = unimportant to 7 = very important...
May 7, 2018: Midwifery
https://www.readbyqxmd.com/read/29777813/polyphenolic-polysaccharide-conjugates-from-flowers-and-fruits-of-single-seeded-hawthorn-crataegus-monogyna-jacq-chemical-profiles-and-mechanisms-of-anticoagulant-activity
#12
Izabela Pawlaczyk-Graja
The polyphenolic-polysaccharide conjugates were isolated from flowers and fruits of medicinal plant Crataegus monogyna Jacq. (Lindm.) by the alkaline extraction, followed by neutralization, partitioning with organic solvents and dialysis against water. The isolates from flowers as well as from fruits were homogenous macromolecular compounds, with a molecular weight over 760 × 103  g/mol and 970 × 103  g/mol, respectively, what was assessed in HPGPC analysis. Both products were characterized spectrophotometrically, and by GLC-MS, FT-IR and NMR techniques...
May 16, 2018: International Journal of Biological Macromolecules
https://www.readbyqxmd.com/read/29777806/the-formation-of-zein-chitosan-complex-coacervated-particles-relationship-to-encapsulation-and-controlled-release-properties
#13
Meng-Fan Li, Lang Chen, Ming-Ze Xu, Jing-Lin Zhang, Qin Wang, Qing-Zhu Zeng, Xing-Chuan Wei, Yang Yuan
The complex coacervation between zein and chitosan (CS) as well as the relationship with the controlled release properties of their complex nanoparticles were studied. The factors influencing the nanoparticle formation between zein and CS, including solid to liquid ratio, zein to CS ratio and pH, were systematically investigated. The structural analysis by FT-IR revealed that the electrostatic interaction was the driving force to form zein-CS nanoparticles (ZCNPs). The mean particle sizes of ZCNPs were increased by enhanced integration degree between zein and CS (from 90...
May 16, 2018: International Journal of Biological Macromolecules
https://www.readbyqxmd.com/read/29777647/correlates-of-postpartum-sexual-activity-and-contraceptive-use-in-kano-northern-nigeria
#14
Zubairu Iliyasu, Hadiza S Galadanci, Khadija M Danlami, Hamisu M Salihu, Muktar H Aliyu
Practices related to resumption of coitus after childbirth remains poorly documented in Nigeria. This study examined factors associated with sexual intercourse, delivery-coitus interval, and contraceptive use among postpartum women attending a tertiary centre in Kano, northern Nigeria. A cross section of 317 women attending immunization, postnatal and family planning clinics within 12 months of childbirth was interviewed using a structured questionnaire. Vaginal intercourse was resumed by most women (n=212; 66...
March 2018: African Journal of Reproductive Health
https://www.readbyqxmd.com/read/29777640/factors-associated-with-parental-intent-not-to-circumcise-daughters-in-enugu-state-of-nigeria-an-application-of-the-theory-of-planned-behavior
#15
Cajetan I Ilo, Sandra A Darfour-Oduro, Jerome O Okafor, Diana S Grigsby-Toussaint, Ignatius O Nwimo, Chinagorom Onwunaka
This study explored intention of parents not to circumcise daughters in Enugu State, Nigeria using theory of planned behavior (TPB) as a framework. A survey of 1345 parents was carried out using structured questionnaire with FGM question items based on TPB constructs of attitude, subjective norm (SN), perceived behavioral control (PBC), and intention. Intention was dichotomized into two categories and logistic regression analysis was performed to examine the association between the constructs of TPB while controlling for some socio-demographic factors...
March 2018: African Journal of Reproductive Health
https://www.readbyqxmd.com/read/29777561/the-association-of-sociodemographic-factors-and-needs-of-hemodialysis-patients-according-to-maslow-s-hierarchy-of-needs
#16
Chiung-Yu Shih, Chiu-Ya Huang, Mei-Lun Huang, Chyong-Mei Chen, Fu-In Tang
AIM: To explore the association between the sociodemographic factors and the needs of patients undergoing hemodialysis in Taiwan. BACKGROUND: Concomitant discomfort, including physical and mental aspects, affects the patients' quality of life and their willingness to undergo hemodialysis. Maslow's hierarchy of needs is a well-known tool to assess different levels of human needs. METHOD: We conducted a small-scale cross-sectional observational study using a structured needs assessment questionnaire on 159 patients from the Taipei Veterans General Hospital hemodialysis unit...
May 18, 2018: Journal of Clinical Nursing
https://www.readbyqxmd.com/read/29777464/the-key-features-approach-to-assess-clinical-decisions-validity-evidence-to-date
#17
REVIEW
G Bordage, G Page
The key-features (KFs) approach to assessment was initially proposed during the First Cambridge Conference on Medical Education in 1984 as a more efficient and effective means of assessing clinical decision-making skills. Over three decades later, we conducted a comprehensive, systematic review of the validity evidence gathered since then. The evidence was compiled according to the Standards for Educational and Psychological Testing's five sources of validity evidence, namely, Content, Response process, Internal structure, Relations to other variables, and Consequences, to which we added two other types related to Cost-feasibility and Acceptability...
May 17, 2018: Advances in Health Sciences Education: Theory and Practice
https://www.readbyqxmd.com/read/29777331/sexual-expression-and-it-s-determinants-in-people-diagnosed-with-psychotic-disorders
#18
José de Jager, Roos van Greevenbroek, Annet Nugter, Jim van Os
This qualitative study aims to explore the difficulties people with a psychotic disorder have in sexual expression, and associated determinants. Twenty-eight semi-structured interviews were conducted and analyzed using the Grounded Theory method. Almost all participants experienced unfulfilled needs in sexual expression. These unfulfilled needs were associated with a range of factors, including antipsychotic medication, psychotic symptoms, sexual abuse, social skills and stigma, all of which may converge on a pathway involving (sexual) self-esteem...
May 18, 2018: Community Mental Health Journal
https://www.readbyqxmd.com/read/29776533/safe-driving-practices-and-factors-associated-with-motor-vehicle-collisions-among-people-with-insulin-treated-diabetes-mellitus-results-from-the-diabetes-and-driving-dad-study
#19
Turky H Almigbal, Abdullah A Alfaifi, Muath A Aleid, Baki Billah, Mohammed J Alramadan, Eman Sheshah, Turki A AlMogbel, Ghassan A Aldekhayel, Mohammed Ali Batais
INTRODUCTION: The aim of this study was to assess the prevalence of people with insulin-treated diabetes mellitus (ITDM) who have discussed issues related to diabetes and driving with their health care providers (HCPs). We also sought to determine the safe driving practices that are currently employed by this group. Finally, we investigated the factors that might increase the risk of motor-vehicle collisions (MVCs) among this group in Saudi Arabia. METHOD: This cross-sectional study surveyed a representative sample of 429 current male drivers with ITDM using a structured questionnaire in Saudi Arabia...
June 2018: Journal of Safety Research
https://www.readbyqxmd.com/read/29776524/analysis-of-hourly-crash-likelihood-using-unbalanced-panel-data-mixed-logit-model-and-real-time-driving-environmental-big-data
#20
Feng Chen, Suren Chen, Xiaoxiang Ma
INTRODUCTION: Driving environment, including road surface conditions and traffic states, often changes over time and influences crash probability considerably. It becomes stretched for traditional crash frequency models developed in large temporal scales to capture the time-varying characteristics of these factors, which may cause substantial loss of critical driving environmental information on crash prediction. METHOD: Crash prediction models with refined temporal data (hourly records) are developed to characterize the time-varying nature of these contributing factors...
June 2018: Journal of Safety Research
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