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https://www.readbyqxmd.com/read/28434200/land-use-for-animal-production-in-global-change-studies-defining-and-characterizing-a-framework
#1
Leanne N Phelps, Jed O Kaplan
Land use for animal production influences the earth system in a variety of ways, including local-scale modification to biodiversity, soils, and nutrient cycling; regional changes in albedo and hydrology; and global-scale changes in greenhouse gas and aerosol concentrations. Pasture is furthermore the single most extensive form of land cover, currently comprising about 22 - 26% of the earth's ice-free land surface. Despite the importance and variable expressions of animal production, distinctions among different systems are effectively absent from studies of land use and land cover change...
April 23, 2017: Global Change Biology
https://www.readbyqxmd.com/read/28434194/cytotoxic-triterpenoids-from-the-stalks-of-microtropis-triflora
#2
Xiao-Wei Zhang, Kui-Wu Wang, Man-Qing Zhou
Bioassay-guided phytochemcal investigation of the stalks of Microtropis triflora Merr. et Freem led to the isolation of ten triterpenes 1-10, including one novel compound 24-epoxy-2α, 24-dihydroxy-29-friedelanoic acid (1). Their chemical structures were identified on the basis of spectroscopic analysis, including HRESI mass spectrometry, 1D and 2D NMR ((1) H, (13) C, (1) H-(1) H COSY, HSQC, HMBC and NOESY), and by comparison with the data reported. The cytotoxicities of the compounds 1-10 against a panel of cultured human tumor cell lines (Bcap37, SMMC7721, Hela, CNE) were evaluated...
April 23, 2017: Chemistry & Biodiversity
https://www.readbyqxmd.com/read/28434162/isolation-of-astrocytes-displaying-myofibroblast-properties-and-present-in-multiple-sclerosis-lesions
#3
Nicolas Vedrenne, Vincent Sarrazy, Laurence Richard, Nelly Bordeau, Serge Battu, Fabrice Billet, Alexis Desmoulière
A wide heterogeneity of lesions can affect the central nervous system (CNS). In all situations where neurons are damaged, including multiple sclerosis (MS), a common reactive astrocytosis is present. Sedimentation field-flow fractionation (SdFFF) was used to sort astrocyte subpopulations. After SdFFF elution, cells, prepared from rat newborn cortex, were cultured and analyzed by immunocytofluorescence for glial fibrillary acidic protein (GFAP) and α-smooth muscle (SM) actin (a specific marker for myofibroblasts) expression...
April 22, 2017: Neurochemical Research
https://www.readbyqxmd.com/read/28434135/son-preference-of-immigrants-to-the-united-states-data-from-u-s-birth-certificates-2004-2013
#4
Embry M Howell, Huanjun Zhang, Dudley L Poston
Son preference has existed for centuries in many cultures and societies. In some Asian countries, including China and India, the sex ratio at birth (SRB, number of male infants divided by number of female infants times 100) is elevated above the worldwide biological norm of about 105. We investigate whether this ratio is elevated in the U.S. for immigrant women. We analyze U.S. birth certificates for 2004-2013 and categorize births by mother's and father's race/ethnicity; mother's place of birth, and birth order of the child...
April 22, 2017: Journal of Immigrant and Minority Health
https://www.readbyqxmd.com/read/28434105/far-infrared-ray-for-treating-chronic-lower-extremity-lymphedema-with-dermatolymphangioadenitis-a-postoperative-complication-of-gynecological-tumor-resection
#5
Ke Li, Heng Xu, Ning Fei Liu, Parviz Sadigh, Verity Evans, Yi Xin Zhang
PURPOSE: Lower extremity lymphedema is regarded as a relatively common postoperative complication and is often accompanied with dermatolymphangioadenitis (DLA). This study combines clinical assessment and laboratory investigation to explore therapeutic effects of far-infrared radiation (FIR) therapy for chronic lower extremity lymphedema accompanied with DLA, occurring after gynecological tumor resection. METHODS: Patients who met inclusion and exclusion criteria would be enrolled...
April 22, 2017: Archives of Gynecology and Obstetrics
https://www.readbyqxmd.com/read/28434079/cell-culture-complications-due-to-mechanical-release-of-atp-and-activation-of-purinoceptors
#6
REVIEW
Geoffrey Burnstock, Gillian E Knight
There is abundant evidence that ATP (adenosine 5'-triphosphate) is released from a variety of cultured cells in response to mechanical stimulation. The release mechanism involved appears to be a combination of vesicular exocytosis and connexin and pannexin hemichannels. Purinergic receptors on cultured cells mediate both short-term purinergic signalling of secretion and long-term (trophic) signalling such as proliferation, migration, differentiation and apoptosis. We aim in this review to bring to the attention of non-purinergic researchers using tissue culture that the release of ATP in response to mechanical stress evoked by the unavoidable movement of the cells acting on functional purinergic receptors on the culture cells is likely to complicate the interpretation of their data...
April 22, 2017: Cell and Tissue Research
https://www.readbyqxmd.com/read/28434053/chinese-beliefs-in-luck-are-linked-to-gambling-problems-via-strengthened-cognitive-biases-a-mediation-test
#7
Matthew S M Lim, Robert D Rogers
Problematic patterns of gambling and their harms are known to have culturally specific expressions. For ethnic Chinese people, patterns of superstitious belief in this community appear to be linked to the elevated rates of gambling-related harms; however, little is known about the mediating psychological mechanisms. To address this issue, we surveyed 333 Chinese gamblers residing internationally and used a mediation analysis to explore how gambling-related cognitive biases, gambling frequency and variety of gambling forms ('scope') mediate the association between beliefs in luck and gambling problems...
April 22, 2017: Journal of Gambling Studies
https://www.readbyqxmd.com/read/28433965/national-health-policy-2017-a-cautious-welcome
#8
T Sundararaman
On March 15, 2017 the union cabinet approved the new National Health Policy. The next day a 28-page policy text and an accompanying 13-page situational analysis were placed in Parliament and in the public domain. To have, at all times, a health policy in place that shows a road map on how a nation would show "progressive realization" of health as a basic human right is an obligation under the International Covenant on Economic, Social and Cultural Rights. This is an international treaty adopted in 1976, to which India became a signatory in 1979, and this was one of the catalysts for the adoption of the first National Health Policy in 1 983...
April 4, 2017: Indian Journal of Medical Ethics
https://www.readbyqxmd.com/read/28433964/ethical-management-of-substance-use-disorders-the-indian-scenario
#9
Arpit Parmar, Vaibhav Patil, Siddharth Sarkar
Substance use disorders are among the most prevalent and emergent public health problems in India. The treatment of individuals with these disorders is associated with many ethical dilemmas. Due to the pervasiveness of substance use disorders, the majority of mental health professionals working in the area of addiction medicine face several ethical dilemmas. When discussing substance use disorders, it must be borne in mind that there are important differences between India and the western countries in terms of the social and cultural aspects, as well as the legislative framework and healthcare delivery system...
April 4, 2017: Indian Journal of Medical Ethics
https://www.readbyqxmd.com/read/28433961/harnessing-the-medical-humanities-for-experiential-learning
#10
Satendra Singh, Purnima Barua, Upreet Dhaliwal, Navjeevan Singh
A month-long workshop on medical humanities was held in the Jorhat Medical College, Assam in September 2015. It employed experiential learning (both online and onsite) using humanities tools, such as the theatre of the oppressed, art, literature, reflective narratives, movies, the history of medicine, graphic medicine, poetry and diversity studies. As a result of the interactions, 28 volunteer participants, comprising students and faculty members, wrote reflective narratives on doctor​-patient relationships, produced a newsletter and a logo for their medical humanities group, and staged cultural performances and forum theatre...
March 29, 2017: Indian Journal of Medical Ethics
https://www.readbyqxmd.com/read/28433939/enhanced-proangiogenic-potential-of-mesenchymal-stem-cell-derived-exosomes-stimulated-by-a-nitric-oxide-releasing-polymer
#11
Wei Du, Kaiyue Zhang, Shuaiqiang Zhang, Ran Wang, Yan Nie, Hongyan Tao, Zhibo Han, Lu Liang, Di Wang, Jianfeng Liu, Na Liu, Zhongchao Han, Deling Kong, Qiang Zhao, Zongjin Li
Mesenchymal stem cell (MSC)-derived exosomes have been recognized as new candidates for the treatment of degenerative diseases or injury and may provide an alternative to cell-based therapy. However, the compositions in MSC-derived exosomes are highly influenced by the microenvironment in which their original cells reside. Here, we hypothesized that a nitric oxide (NO)-releasing polymer can boost the proangiogenic compositions of exosomes and enhance their proangiogenic capacity. Our results demonstrated that exosomes, released from human placenta-derived MSCs (hP-MSCs) by NO stimulation, augment the angiogenic effects of human umbilical vein endothelial cells (HUVECs) in vitro...
April 17, 2017: Biomaterials
https://www.readbyqxmd.com/read/28433910/succinic-acid-production-by-immobilized-cultures-using-spent-sulphite-liquor-as-fermentation-medium
#12
Maria Alexandri, Harris Papapostolou, Lutgart Stragier, Willy Verstraete, Seraphim Papanikolaou, Apostolis A Koutinas
Spent sulphite liquor (SSL) was used as carbon source for the production of succinic acid using immobilized cultures of Actinobacillus succinogenes and Basfia succiniciproducens on two different supports, delignified cellulosic material (DCM) and alginate beads. Fed-batch immobilized cultures with A. succinogenes in alginates resulted in higher sugar to succinic acid conversion yield (0.81g/g) than the respective yield achieved (0.65g/g) when DCM immobilized cultures were used. The final succinic acid concentration and yield achieved in fed-batch with immobilized cultures of B...
March 25, 2017: Bioresource Technology
https://www.readbyqxmd.com/read/28433909/culturing-of-selenastrum-on-diluted-composting-fluids-conversion-of-waste-to-valuable-algal-biomass-in-presence-of-bacteria
#13
Marika Tossavainen, Anne Nykänen, Kalle Valkonen, Anne Ojala, Silja Kostia, Martin Romantschuk
Growth and fatty acid production of microalga Selenastrum sp. with associated bacteria was studied in lab-scale experiments in three composting leachate liquids. Nutrient reduction in cultures was measured at different initial substrate strengths. A small, pilot-scale photobioreactor (PBR) was used to verify lab-scale results. Similar growth conditions supported growth of both Selenastrum and bacteria. CO2 feed enhanced the production of biomass and lipids in PBR (2.4gL(-1) and 17% DW) compared to lab-scale (0...
April 7, 2017: Bioresource Technology
https://www.readbyqxmd.com/read/28433878/effect-of-freshwater-sediment-characteristics-on-the-persistence-of-fecal-indicator-bacteria-and-genetic-markers-within-a-southern-california-watershed
#14
Amity G Zimmer-Faust, Vanessa Thulsiraj, Catalina Marambio-Jones, Yiping Cao, John F Griffith, Patricia A Holden, Jennifer A Jay
In this study, the aging of culturable FIB and DNA representing genetic markers for Enterococcus spp. (ENT1A), general Bacteroides (GB3), and human-associated Bacteroides (HF183) in freshwater sediments was evaluated. Freshwater sediment was collected from four different sites within the upper and lower reach of the Topanga Creek Watershed and two additional comparator sites within the Santa Monica Bay, for a total of six sites. Untreated (ambient) and oven-dried (reduced microbiota) sediment was inoculated with 5% sewage and artificial freshwater...
April 18, 2017: Water Research
https://www.readbyqxmd.com/read/28433854/comorbidity-age-of-onset-and-suicidality-in-obsessive-compulsive-disorder-ocd-an-international-collaboration
#15
V Brakoulias, V Starcevic, A Belloch, C Brown, Y A Ferrao, L F Fontenelle, C Lochner, D Marazziti, H Matsunaga, E C Miguel, Ycj Reddy, M C do Rosario, R G Shavitt, A Shyam Sundar, D J Stein, A R Torres, K Viswasam
OBJECTIVES: To collate data from multiple obsessive-compulsive disorder (OCD) treatment centers across seven countries and five continents, and to report findings in relation to OCD comorbidity, age of onset of OCD and comorbid disorders, and suicidality, in a large clinical and ethnically diverse sample, with the aim of investigating cultural variation and the utility of the psychiatric diagnostic classification of obsessive-compulsive and related disorders. METHODS: Researchers in the field of OCD were invited to contribute summary statistics on current and lifetime psychiatric comorbidity, age of onset of OCD and comorbid disorders and suicidality in their patients with OCD...
April 12, 2017: Comprehensive Psychiatry
https://www.readbyqxmd.com/read/28433822/programming-experience-promotes-higher-stem-motivation-among-first-grade-girls
#16
Allison Master, Sapna Cheryan, Adriana Moscatelli, Andrew N Meltzoff
The gender gap in science, technology, engineering, and math (STEM) engagement is large and persistent. This gap is significantly larger in technological fields such as computer science and engineering than in math and science. Gender gaps begin early; young girls report less interest and self-efficacy in technology compared with boys in elementary school. In the current study (N=96), we assessed 6-year-old children's stereotypes about STEM fields and tested an intervention to develop girls' STEM motivation despite these stereotypes...
April 20, 2017: Journal of Experimental Child Psychology
https://www.readbyqxmd.com/read/28433789/macromolecular-crowding-for-tailoring-tissue-derived-fibrillated-matrices
#17
Valentina Magno, Jens Friedrichs, Heather M Weber, Marina C Prewitz, Mikhail V Tsurkan, Carsten Werner
Tissue-derived fibrillated matrices can be instrumental for the in vitro reconstitution of multiphasic extracellular microenvironments. However, despite of several advantages, the obtained scaffolds so far offer a rather narrow range of materials characteristics only. In this work, we demonstrate how macromolecular crowding (MMC) - the supplementation of matrix reconstitution media with synthetic or natural macromolecules in ways to create excluded volume effects (EVE) - can be employed for tailoring important structural and biophysical characteristics of kidney-derived fibrillated matrices...
April 19, 2017: Acta Biomaterialia
https://www.readbyqxmd.com/read/28433788/regulation-of-human-nucleus-pulposus-cells-by-peptide-coupled-substrates
#18
Devin T Bridgen, Bailey V Fearing, Liufang Jing, Johannah Sanchez-Adams, Megan C Cohan, Farshid Guilak, Jun Chen, Lori A Setton
Nucleus pulposus (NP) cells are derived from the notochord and differ from neighboring cells of the intervertebral disc in phenotypic marker expression and morphology. Adult human NP cells lose this phenotype and morphology with age in a pattern that contributes to progressive disc degeneration and pathology. Select laminin-mimetic peptide ligands and substrate stiffnesses were examined for their ability to regulate human NP cell phenotype and biosynthesis through the expression of NP-specific markers aggrecan, N-cadherin, collagen types I and II, and GLUT1...
April 19, 2017: Acta Biomaterialia
https://www.readbyqxmd.com/read/28433773/who-s-calling-social-networks-and-mobile-phone-use-among-motorcyclists
#19
Chris De Gruyter, Long T Truong, Hang T T Nguyen
Mobile phone use while riding a motorcycle poses a key safety risk, particularly among younger people who have been found to be more susceptible to distracted driving. While previous research has examined the influence of social networks on mobile phone use while driving a car, no research has explored this association in the context of motorcycle use. Using a survey of university students in Vietnam, this research explores the association between social networks and mobile phone use among motorcyclists and the links this has to reported crashes/falls...
April 20, 2017: Accident; Analysis and Prevention
https://www.readbyqxmd.com/read/28433762/novel-viral-and-host-targets-to-cure-hepatitis-b
#20
REVIEW
Chunkyu Ko, Thomas Michler, Ulrike Protzer
Hepatitis B virus (HBV) infection is a global health threat with 240 million chronic carriers at high risk to develop hepatocellular carcinoma. Current antiviral treatment can efficiently control viral replication and reduce liver inflammation, but is still quite far from achieving a cure. Significant progress has been made in understanding the virus life cycle and virus-host interaction in the past few years. With identification of the HBV receptor, cell-culture infection systems have become available that allow drug screening and establishing a pipeline of potential antivirals targeting either viral or host factors...
April 20, 2017: Current Opinion in Virology
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