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https://www.readbyqxmd.com/read/28527428/physicochemical-and-biological-interactions-between-cerium-oxide-nanoparticles-and-a-1-8-naphthalimide-derivative
#1
Gerardo Pulido-Reyes, Esperanza Martín, J L Gu Coronado, Francisco Leganes, Roberto Rosal, Francisca Fernández-Piñas
Cerium (Ce) oxide nanoparticles (CNPs) have attracted attention due to their high bioactivity and unique redox-chemistry. The oxygen vacancies at the surface of the nanoparticle explain the autocatalytic properties of CNPs in which the Ce(3+) atoms occupy the center of the oxygen vacancies surrounded by Ce(4+) atoms. Until now, CNPs have been associated with organic molecules at the synthesis stage to extend their applications or improve their stability. However, there is a lack of information regarding the post-synthesis interaction of CNPs and organic molecules that could enhance or induce new properties...
May 10, 2017: Journal of Photochemistry and Photobiology. B, Biology
https://www.readbyqxmd.com/read/28527423/task-related-and-person-related-variables-influence-the-effect-of-low-back-pain-on-anticipatory-postural-adjustments
#2
Jesse V Jacobs, Courtney A Lyman, Juvena R Hitt, Sharon M Henry
BACKGROUND: People with low back pain exhibit altered postural coordination that has been suggested as a target for treatment, but heterogeneous presentation has rendered it difficult to identify appropriate candidates and protocols for such treatments. This study evaluated the associations of task-related and person-related factors with the effect of low back pain on anticipatory postural adjustments. METHODS: Thirteen subjects with and 13 without low back pain performed seated, rapid arm flexion in self-initiated and cued conditions...
May 17, 2017: Human Movement Science
https://www.readbyqxmd.com/read/28527418/atmospheric-pcdd-f-concentration-and-source-apportionment-in-typical-rural-agent-orange-hotspots-and-industrial-areas-in-vietnam
#3
Tuan Hung Ngo, To Thi Hien, Ngo Thi Thuan, Nguyen Hung Minh, Kai Hsien Chi
Vietnam has a double burden of dioxin from both industrial sources and historical sources. To evaluate the concentration of PCDD/Fs in ambient air in different areas of Vietnam and their possible sources, atmospheric samples were collected from three areas namely Son La (rural area) and Da Nang (harbor - Agent Orange hotspot area), and Ho Chi Minh City (metropolitan - industrial city). Vapor and solid phases of PCDD/Fs were collected and analyzed following the TO-9A sampling method. Principal Component Analysis and Positive Matrix Factorization model were applied to characterize the possible source...
May 11, 2017: Chemosphere
https://www.readbyqxmd.com/read/28527393/a-combination-of-platelet-features-allows-detection-of-early-stage-cancer
#4
Siamack Sabrkhany, Marijke J E Kuijpers, Sander M J van Kuijk, Linda Sanders, Sharo Pineda, Steven W M Olde Damink, Anne-Marie C Dingemans, Arjan W Griffioen, Mirjam G A Oude Egbrink
BACKGROUND: Detection of early-stage cancer significantly improves patient survival. As platelets play an important role in cancer progression, we aimed to investigate whether platelets can be used for the discovery of early-stage cancer. METHODS: Patients with lung (n = 86) or head of pancreas (n = 42) cancer were included, as were healthy sex- and age-matched controls (n = 92). Blood was collected before initiation of treatment. Platelet count, volume and activation status were quantified in whole blood...
May 17, 2017: European Journal of Cancer
https://www.readbyqxmd.com/read/28527389/dynamics-of-dissolved-organic-matter-in-riverine-sediments-affected-by-weir-impoundments-production-benthic-flux-and-environmental-implications
#5
Meilian Chen, Sung-Han Kim, Heon-Jae Jung, Jung-Ho Hyun, Jung Hyun Choi, Hyo-Jin Lee, In-Ae Huh, Jin Hur
In order to understand the characteristics and dynamics of dissolved organic matter (DOM) in the sediment of rivers affected by impoundments, we examined the vertical profiles and the benthic fluxes of DOM in four different core sediments located at upstream sites of weirs in major rivers of South Korea. In three out of four sites, exponential accumulation of dissolved organic carbon (DOC) with depth was observed with the signature of seasonal variability. Except for the site displaying a below-detection limit of Fe(II), the general accumulation trends of DOC with depth was concurrent with the increases of Fe(II) and NH4(+) and the decrease of PO4(3-), signifying a close linkage of the DOM dynamics with anaerobic respiration via iron reduction, an important early diagenesis pathway...
May 12, 2017: Water Research
https://www.readbyqxmd.com/read/28527385/pharmacokinetic-analyses-using-absorption-kinetics-in-low-alcohol-dose-cases-of-drunken-driving
#6
Ayako Himemiya-Hakucho, Tatsuya Fujimiya
In Japan, low-alcohol dose cases of drunken driving, where drivers drink just before getting behind the wheel, are increasing for expert witnesses since the penalties for drunken driving have become stricter. Widmark's equation has generally been used for the pharmacokinetic analysis of blood alcohol concentration, which encompasses the one-compartment model with zero-order elimination kinetics but ignores absorption kinetics. We therefore propose that the formula might not be applicable to the analysis of low-alcohol dose cases of drunken driving because the issue is focused on the absorption phase...
May 5, 2017: Legal Medicine
https://www.readbyqxmd.com/read/28527370/atherosclerotic-dyslipidemia-revealed-by-plasma-lipidomics-on-apoe-mice-fed-a-high-fat-diet
#7
Yanyan Chen, Shiyuan Wen, Miaomiao Jiang, Yan Zhu, Liqin Ding, Hong Shi, Pengzhi Dong, Jing Yang, Yue Yang
BACKGROUND AND AIMS: The pathological process of atherosclerosis is closely related to lipid accumulation at arterial wall caused by lipoproteins transporting lipids through blood. In this study, we investigate the lipid composition in the plasma of apolipoprotein E deficient (ApoE(-/-)) mice fed a high-fat diet to reveal atherosclerosis-induced dyslipidemia. METHODS: ApoE(-/-) and corresponding wild-type C57BL/6J mice were used as the pathology model and control, respectively, and were fed a high-fat or normal diet...
May 11, 2017: Atherosclerosis
https://www.readbyqxmd.com/read/28527359/nanocubes-of-indium-oxide-induce-cytotoxicity-and-apoptosis-through-oxidative-stress-in-human-lung-epithelial-cells
#8
Maqusood Ahamed, Mohd Javed Akhtar, M A Majeed Khan, Hisham A Alhadlaq, Ali Aldalbahi
The demand for semiconductor indium oxide (In2O3) nanocrystals is increasing because of their diverse applications, including in biomedicine. However, there is a scarcity of studies on the biological interaction of indium oxide nanocrystals. Here, we explored the underlying mechanisms of toxicity induced by indium oxide nanocubes in human lung epithelial (A549) cells. Prepared indium oxide nanocubes were crystalline with an average size of 21nm. Biointeraction studies have shown that indium oxide nanocubes induce cell viability reduction and cell membrane damage in a dose- and time-dependent manner...
May 9, 2017: Colloids and Surfaces. B, Biointerfaces
https://www.readbyqxmd.com/read/28527355/antimycotic-activity-of-fengycin-c-biosurfactant-and-its-interaction-with-phosphatidylcholine-model-membranes
#9
Lina María González-Jaramillo, Francisco José Aranda, José Antonio Teruel, Valeska Villegas-Escobar, Antonio Ortiz
Lipopeptide biosurfactants constitute one of the most promising groups of compounds for the treatment and prevention of fungal diseases in plants. Bacillus subtilis strain EA-CB0015 produces iturin A, fengycin C and surfactin and it has been proven useful for the treatment of black Sigatoka disease in banana plants, an important pathology caused by the fungus Mycosphaerella fijiensis (Morelet). We have found that B. subtilis EA-CB0015 cell free supernatants and purified fractions inhibit M. fijiensis cellular growth...
May 10, 2017: Colloids and Surfaces. B, Biointerfaces
https://www.readbyqxmd.com/read/28527353/mechanical-behavior-of-the-abdominal-aortic-aneurysm-assessed-by-biaxial-tests-in-the-rat-xenograft-model
#10
Louise Marais, Mustapha Zidi
This paper addresses the mechanical biaxial behavior of degraded arteries obtained by the rat xenograft model. For that, a pressure myograph was used to perform extension-inflation tests on abdominal aortic aneurysms (AAAs). Furthermore, residual stresses in the aneurismal wall were assessed by opening angle tests. Thus, the changes in mechanical behavior between native murine aortas, decellularized guinea pig aortas (the grafts) and degraded aortas (AAAs) were investigated. It was shown that decellularized and degraded aortas exhibited a different mechanical behavior than native murine aortas...
May 12, 2017: Journal of the Mechanical Behavior of Biomedical Materials
https://www.readbyqxmd.com/read/28527329/what-role-does-adolescent-neighborhood-play-for-adult-health-a-cross-classified-multilevel-analysis-of-life-course-models-in-northern-sweden
#11
Per E Gustafsson, Kayvan Bozorgmehr, Anne Hammarström, Miguel San Sebastian
This study examined whether, and by which life course models, adolescent neighborhood environment relate to health in mid-adulthood. Data came from the Northern Swedish Cohort (n=1001), surveyed at age 16, 21, 30 and 42 years including functional somatic symptoms at age 42, and individual disadvantage neighborhood disadvantage at all four ages. Results from cross-classified multilevel models showed that 12.7% of age 42 health variance was explained by an interaction of age 16 and age 42 neighborhood of residence...
May 17, 2017: Health & Place
https://www.readbyqxmd.com/read/28527328/living-in-violence-neighborhood-domestic-violence-and-small-for-gestational-age-births
#12
Erica Felker-Kantor, Maeve Wallace, Katherine Theall
OBJECTIVES: To determine the association between neighborhood domestic violence and small-for-gestational-age (SGA) birth and to examine if there is a differential impact of neighborhood domestic violence on SGA births by race in a high crime community. METHODS: This analysis includes all birth records issued in New Orleans, Louisiana from 2011 to 2012 geocoded by census tract (N=177 census tracts, N=8322 women). Hierarchical modeling and ecologic spatial analysis were used to examine the area-effect of neighborhood domestic violence on SGA births, independent of individual-level predictors and accounting for the propensity to live in high domestic violence neighborhoods...
May 17, 2017: Health & Place
https://www.readbyqxmd.com/read/28527322/arsenic-biotransformation-by-a-cyanobacterium-nostoc-sp-pcc-7120
#13
Xi-Mei Xue, Yu Yan, Chan Xiong, Georg Raber, Kevin Francesconi, Ting Pan, Jun Ye, Yong-Guan Zhu
Nostoc sp. PCC 7120 (Nostoc), a typical filamentous cyanobacterium ubiquitous in aquatic system, is recognized as a model organism to study prokaryotic cell differentiation and nitrogen fixation. In this study, Nostoc cells incubated with arsenite (As(III)) for two weeks were extracted with dichloromethane/methanol (DCM/MeOH) and the extract was partitioned between water and DCM. Arsenic species in aqueous and DCM layers were determined using high performance liquid chromatography - inductively coupled plasma mass spectrometer/electrospray tandem mass spectrometry (HPLC-ICPMS/ESIMSMS)...
May 17, 2017: Environmental Pollution
https://www.readbyqxmd.com/read/28527301/exploration-of-dietary-patterns-and-alcohol-consumption-in-pregnant-women-in-the-uk-a-mixed-methods-study
#14
Victoria Coathup, Lesley Smith, Mary Boulton
BACKGROUND: fetal Alcohol Spectrum Disorders is a term used to describe a range of physical, cognitive and behavioural deficits in the offspring of women who drank alcohol during pregnancy. A growing body of evidence suggests alcohol consumption in the presence of poor maternal nutrition may increase the risk of harm to the developing fetus. OBJECTIVE: to investigate relationships between maternal dietary patterns and alcohol consumption, and explore which factors influence women's decisions about what to eat and drink during pregnancy...
April 27, 2017: Midwifery
https://www.readbyqxmd.com/read/28527273/-reliability-and-dimensionality-of-phq-9-in-screening-depression-symptoms-among-health-science-students-in-cartagena-2014
#15
Carlos Arturo Cassiani-Miranda, María Camila Vargas-Hernández, Eduard Pérez-Anibal, Mariana Isabel Herazo-Bustos, Mauricio Hernández-Carrillo
INTRODUCTION: Depression among university students must be screened with valid instruments. The Patient Health Questionnaire (PHQ-9) is reliable and valid for screening depression in a university context; however, its psychometric performance in Colombia is unknown. OBJECTIVE: To estimate the reliability and dimensionality of PHQ-9 as a screening instrument for depressive symptoms among health sciences students of a university in Cartagena, Colombia.Materials y methods: We analyzed the factorial structure and reliability of the PHQ-9 in a sample of 550 students for expected prevalence of clinically-meaningful depressive symptoms (CMDS) of 25% with a confidence level of 95% and an error level of 3%...
April 1, 2017: Biomédica: Revista del Instituto Nacional de Salud
https://www.readbyqxmd.com/read/28527271/self-rated-health-multimorbidity-and-depression-in-mexican-older-adults-proposal-and-evaluation-of-a-simple-conceptual-model
#16
Eduardo Bustos-Vázquez, Julián Alfredo Fernández-Niño, Claudia Iveth Astudillo-Garcia
INTRODUCTION: Self-rated health is an individual and subjective conceptualization involving the intersection of biological, social and psychological factors. It provides an invaluable and unique evaluation of a person's general health status. OBJECTIVE: To propose and evaluate a simple conceptual model to understand self-rated health and its relationship to multimorbidity, disability and depressive symptoms in Mexican older adults. MATERIALS AND METHODS: We conducted a cross-sectional study based on a national representative sample of 8,874 adults of 60 years of age and older...
April 1, 2017: Biomédica: Revista del Instituto Nacional de Salud
https://www.readbyqxmd.com/read/28527267/assessment-of-factors-associated-with-functional-status-in-60-years-old-and-older-adults-in-bogot%C3%A3-colombia
#17
Carlos Cano-Gutiérrez, Miguel Germán Borda, Carlos Reyes-Ortiz, Antonio J Arciniegas, Rafael Samper-Ternent
INTRODUCTION: Functional impairment produces a wide range of negative effects such as difficulty in mobility, social isolation, decreased quality of life, disability and institutionalization. Thus, functional status measurement is a marker of social wellbeing. OBJECTIVE: To determine and characterize the socio-demographic factors and health conditions related to functional impairment in older adults in Bogotá, Colombia. MATERIALS AND METHODS: Data was collected from the SABE Bogotá Study...
April 1, 2017: Biomédica: Revista del Instituto Nacional de Salud
https://www.readbyqxmd.com/read/28527256/-stat3-activation-by-hypoxia-in-in-vitro-models-of-cervix-cancer-and-endothelial-cells
#18
Óscar Ortega, Alejandro Ondo-Méndez, Ruth Garzón
INTRODUCTION: The biological behavior of cancer cells is influenced by the tumor microenvironment in which they develop. In this context, stressor stimuli such as hypoxia are considered critical for tumor development and therapeutic management. Cellular response to various stimuli is evidenced in the activation of intracellular signaling pathways such as JAK/STAT, which is one of the most important for its effects in differentiation and cell proliferation. OBJECTIVE: To evaluate the condition of the JAK/STAT pathway through the expression/activation of the STAT3 protein in cervix cancer cells (HeLa) and endothelial cells (EA...
January 24, 2017: Biomédica: Revista del Instituto Nacional de Salud
https://www.readbyqxmd.com/read/28527236/a-weighted-difference-of-l1-and-l2-on%C3%A2-the%C3%A2-gradient-minimization-based-on%C3%A2-alternating-direction-method-for%C3%A2-circular%C3%A2-computed-tomography
#19
Wanli Lu, Lei Li, Ailong Cai, Hanming Zhang, Linyuan Wang, Bin Yan
Iterative reconstruction algorithms for computed tomography (CT) through total variation (TV) regularization can provide accurate and stable reconstruction results. TV minimization is the L1-norm of gradient-magnitude images and can be regarded as a convex relaxation method to replace the L0 norm. In this study, a fast and efficient algorithm, which is named a weighted difference of L1 and L2 (L1 - αL2) on the gradient minimization, was proposed and investigated. The new algorithm provides a better description of sparsity for the optimization-based algorithms than TV minimization algorithms...
May 15, 2017: Journal of X-ray Science and Technology
https://www.readbyqxmd.com/read/28527220/quantitative-erythrocyte-omega-3-epa-plus-dha-levels-are-related-to-higher-regional-cerebral-blood-flow-on-brain-spect
#20
Daniel G Amen, William S Harris, Parris M Kidd, Somayeh Meysami, Cyrus A Raji
BACKGROUND: The interrelationships between omega-3 fatty acids status, brain perfusion, and cognition are not well understood. OBJECTIVE: To evaluate if SPECT brain imaging of cerebral perfusion and cognition varies as a function of omega-3 fatty acid levels. METHODS: A random sample of 166 study participants was drawn from a psychiatric referral clinical for which erythrocyte quantification of omega-3 eicosapentaenoic acid (EPA) plus docosahexaenoic acid (DHA) (the Omega-3 Index) was available...
May 18, 2017: Journal of Alzheimer's Disease: JAD
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