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https://www.readbyqxmd.com/read/29352796/miscibility-at-the-immiscible-liquid-liquid-interface-a-molecular-dynamics-study-of-thermodynamics-and-mechanism
#1
John J Karnes, Ilan Benjamin
Molecular dynamics simulations are used to study the dissolution of water into an adjacent, immiscible organic liquid phase. Equilibrium thermodynamic and structural properties are calculated during the transfer of water molecule(s) across the interface using umbrella sampling. The net free energy of transfer agrees reasonably well with experimental solubility values. We find that water molecules "prefer" to transfer into the adjacent phase one-at-a-time, without co-transfer of the hydration shell, as in the case of evaporation...
January 21, 2018: Journal of Chemical Physics
https://www.readbyqxmd.com/read/29351288/environmental-enteric-dysfunction-pathways-and-child-stunting-a-systematic-review
#2
Kaitlyn M Harper, Maxine Mutasa, Andrew J Prendergast, Jean Humphrey, Amee R Manges
BACKGROUND: Environmental enteric dysfunction (EED) is commonly defined as an acquired subclinical disorder of the small intestine, characterized by villous atrophy and crypt hyperplasia. EED has been proposed to underlie stunted growth among children in developing countries. A collection of biomarkers, organized into distinct domains, has been used to measure different aspects of EED. Here, we examine whether these hypothesized relationships, among EED domains and between each domain and stunting, are supported by data from recent studies...
January 19, 2018: PLoS Neglected Tropical Diseases
https://www.readbyqxmd.com/read/29349621/adsorption-and-leaching-of-novel-fungicide-pyraoxystrobin-on-soils-by-14c-tracing-method
#3
Xunyue Liu, Huiming Wu, Tingting Hu, Xia Chen, Xingcheng Ding
Pyraoxystrobin, (E)-2-(2-((3-(4-chlorophenyl)-1-methyl-1H-pyrazole-5-yloxy)methyl)phenyl)-3-methoxyacrylate, is a newly developed strobilurin fungicide with high antifungal efficiency. It has high potential to enter soil environments that might subsequently impact surface and groundwater. Therefore, 14C-labeled pyraoxystrobin was used as a tracer to study the adsorption/desorption and migration behavior of this compound under laboratory conditions in three typical agricultural soils. The adsorption isotherms conformed with the Freundlich equation...
January 19, 2018: Environmental Monitoring and Assessment
https://www.readbyqxmd.com/read/29345970/the-prevalence-and-significance-of-staphylococcus-aureus-in-patients-with-non-cystic-fibrosis-bronchiectasis
#4
Mark L Metersky, Timothy R Aksamit, Alan Barker, Radmila Choate, Charles L Daley, Leigh A Daniels, Angela DiMango, Edward Eden, David Griffith, Margaret Johnson, Michael Knowles, Anne E O'Donnell, Kenneth Olivier, Matthias Salathe, Byron Thomashow, Gregory Tino, Gerard Turino, Kevin L Winthrop, David Mannino
RATIONALE: Staphylococcus aureus is commonly cultured from the sputum of patients with bronchiectasis, however little is known about the prevalence of the organism in these patients, the characteristics of patients who have grown the organism or its implications. OBJECTIVES: Determine the relationship between S. aureus and pulmonary function, frequency of exacerbations and frequency of hospitalization in patients with bronchiectasis Methods: The Bronchiectasis Research Registry is a database of adults with non-cystic fibrosis bronchiectasis identified from 13 sites within the United States...
January 18, 2018: Annals of the American Thoracic Society
https://www.readbyqxmd.com/read/29345029/high-prevalence-and-functional-effects-of-serum-antineuronal-antibodies-in-patients-with-gastrointestinal-disorders
#5
A Lütt, K Michel, D Krüger, M S Volz, M Nassir, E Schulz, L Poralla, P Tangermann, C Bojarski, M Höltje, B Teegen, W Stöcker, M Schemann, B Siegmund, H Prüss
BACKGROUND: Antineuronal antibodies can be associated with both gastrointestinal (GI) and brain disorders. For example, antibodies against the potassium channel subunit dipeptidyl-peptidase-like protein-6 (DPPX) bind to neurons in the central nervous system (CNS) and myenteric plexus and cause encephalitis, commonly preceded by severe unspecific GI symptoms. We therefore investigated the prevalence of antineuronal antibodies indicative of treatable autoimmune CNS etiologies in GI patients...
January 18, 2018: Neurogastroenterology and Motility: the Official Journal of the European Gastrointestinal Motility Society
https://www.readbyqxmd.com/read/29344871/laser-capture-microdissection-for-layer-specific-analysis-of-enteric-ganglia
#6
Corinna Rosenbaum, Martina Böttner, Thilo Wedel, Marco Metzger
The enteric nervous system (ENS) is the division of the autonomic nervous system that innervates the gastrointestinal (GI) tract and controls central intestinal functions such as peristalsis and fluid movement. Enteric nerve cell bodies (neurons and glia) are predominantly organized in ganglionated networks that are present along the entire length of the GI tract in multiple tissue layers. Most cell bodies are organized in the myenteric plexus allocated between the longitudinal and the circular muscle layers or in the submucosal plexus between muscle tissue and mucosa...
2018: Methods in Molecular Biology
https://www.readbyqxmd.com/read/29342189/the-microbiota-metabolite-indole-inhibits-salmonella-virulence-involvement-of-the-phopq-two-component-system
#7
Nandita Kohli, Zeni Crisp, Rebekah Riordan, Michael Li, Robert C Alaniz, Arul Jayaraman
The microbial community present in the gastrointestinal tract is an important component of the host defense against pathogen infections. We previously demonstrated that indole, a microbial metabolite of tryptophan, reduces enterohemorrhagic Escherichia coli O157:H7 attachment to intestinal epithelial cells and biofilm formation, suggesting that indole may be an effector/attenuator of colonization for a number of enteric pathogens. Here, we report that indole attenuates Salmonella Typhimurium (Salmonella) virulence and invasion as well as increases resistance to colonization in host cells...
2018: PloS One
https://www.readbyqxmd.com/read/29342183/identification-of-volatiles-released-by-diapausing-brown-marmorated-stink-bug-halyomorpha-halys-hemiptera-pentatomidae
#8
Laura J Nixon, William R Morrison, Kevin B Rice, Eckehard G Brockerhoff, Tracy C Leskey, Filadelfo Guzman, Ashot Khrimian, Stephen Goldson, Michael Rostás
The brown marmorated stink bug, Halyomorpha halys, is an agricultural and urban pest that has become widely established as an invasive species of major concern in the USA and across Europe. This species forms large aggregations when entering diapause, and it is often these aggregations that are found by officials conducting inspections of internationally shipped freight. Identifying the presence of diapausing aggregations of H. halys using their emissions of volatile organic compounds (VOCs) may be a potential means for detecting and intercepting them during international freight inspections...
2018: PloS One
https://www.readbyqxmd.com/read/29340781/suicidal-thoughts-and-behaviors-among-college-students-and-same-aged-peers-results-from-the-world-health-organization-world-mental-health-surveys
#9
Philippe Mortier, Randy P Auerbach, Jordi Alonso, William G Axinn, Pim Cuijpers, David D Ebert, Jennifer G Green, Irving Hwang, Ronald C Kessler, Howard Liu, Matthew K Nock, Stephanie Pinder-Amaker, Nancy A Sampson, Alan M Zaslavsky, Jibril Abdulmalik, Sergio Aguilar-Gaxiola, Ali Al-Hamzawi, Corina Benjet, Koen Demyttenaere, Silvia Florescu, Giovanni De Girolamo, Oye Gureje, Josep Maria Haro, Chiyi Hu, Yueqin Huang, Peter De Jonge, Elie G Karam, Andrzej Kiejna, Viviane Kovess-Masfety, Sing Lee, John J Mcgrath, Siobhan O'neill, Vladimir Nakov, Beth-Ellen Pennell, Marina Piazza, José Posada-Villa, Charlene Rapsey, Maria Carmen Viana, Miguel Xavier, Ronny Bruffaerts
PURPOSE: The primary aims are to (1) obtain representative prevalence estimates of suicidal thoughts and behaviors (STB) among college students worldwide and (2) investigate whether STB is related to matriculation to and attrition from college. METHODS: Data from the WHO World Mental Health Surveys were analyzed, which include face-to-face interviews with 5750 young adults aged 18-22 spanning 21 countries (weighted mean response rate = 71.4%). Standardized STB prevalence estimates were calculated for four well-defined groups of same-aged peers: college students, college attriters (i...
January 16, 2018: Social Psychiatry and Psychiatric Epidemiology
https://www.readbyqxmd.com/read/29334758/anticancer-thiosemicarbazones-chemical-properties-interaction-with-iron-metabolism-and-resistance-development
#10
Petra Heffeter, Veronika F S Pape, Eva A Enyedy, Bernhard K Keppler, Gergely Szakas, Christian R Kowol
SIGNIFICANCE: During the last decades, thiosemicarbazones have been clinically developed for a variety of diseases including tuberculosis, viral infections, malaria and cancer. With regard to malignant diseases, the class of α-N-heterocyclic thiosemicarbazones, and here especially Triapine, was intensively developed in multiple clinical phase I/II trials. Recent Advances: Very recently two new derivatives, namely COTI-2 and DpC have entered phase I evaluation. Based on the strong metal-chelating/metal-interacting properties of thiosemicarbazones, interference with the cellular iron (and copper) homeostasis is assumed to play an important role in their biological activity...
January 15, 2018: Antioxidants & Redox Signaling
https://www.readbyqxmd.com/read/29331620/antagonistic-effect-of-nano-zno-and-cetyltrimethyl-ammonium-chloride-on-the-growth-of-chlorella-vulgaris-dissolution-and-accumulation-of-nano-zno
#11
Na Liu, Yipeng Wang, Fei Ge, Shixiang Liu, Huaixian Xiao
The interaction of nanoparticles with coexisting chemicals affects the fate and transport of nanoparticles, as well as their combined effects on aquatic organisms. Here, we evaluated the joint effect of ZnO nanoparticle (nano-ZnO) and cetyltrimethyl ammonium chloride (CTAC) on the growth of Chlorella vulgaris and explored the possible mechanism. Results showed that an antagonistic effect of nano-ZnO and CTAC (0.1, 0.2 and 0.3 mg L-1) was found because CTAC stop nano-ZnO being broken down into solution zinc ions (Zn2+)...
December 29, 2017: Chemosphere
https://www.readbyqxmd.com/read/29330717/posterior-retroperitoneoscopic-resection-of-extra-adrenal-paraganglioma-located-in-the-aorto-caval-space
#12
Sang-Wook Kang, Emad Kandil, Min Jhi Kim, Kwang Soon Kim, Cho Rok Lee, Jong Ju Jeong, Kee-Hyun Nam, Woong Youn Chung, Cheong Soo Park
BACKGROUND: The posterior retroperitoneoscopic adrenalec tomy has several advantages compared with the transperitoneal approach such as a shorter and more direct route to the target organ, no breach of the intraperitoneal space, and no required retraction of the adjacent organs. It also is a safe procedure with a short learning curve.1-5 This report presents a challenging case of an extra-adrenal paraganglioma located in the aorto-caval space and managed using the retroperitoneal approach...
January 12, 2018: Annals of Surgical Oncology
https://www.readbyqxmd.com/read/29330665/a-synthetic-pathway-for-the-production-of-2-hydroxyisovaleric-acid-in-escherichia-coli
#13
Seokjung Cheong, James M Clomburg, Ramon Gonzalez
Synthetic biology, encompassing the design and construction of novel artificial biological pathways and organisms and the redesign of existing natural biological systems, is rapidly expanding the number of applications for which biological systems can play an integral role. In the context of chemical production, the combination of synthetic biology and metabolic engineering approaches continues to unlock the ability to biologically produce novel and complex molecules from a variety of feedstocks. Here, we utilize a synthetic approach to design and build a pathway to produce 2-hydroxyisovaleric acid in Escherichia coli and demonstrate how pathway design can be supplemented with metabolic engineering approaches to improve pathway performance from various carbon sources...
January 12, 2018: Journal of Industrial Microbiology & Biotechnology
https://www.readbyqxmd.com/read/29329027/cytotoxic-and-anticancer-properties-of-new-ruthenium-polypyridyl-complexes-with-different-lipophilicities
#14
Anjong Florence Tikum, Yu Jeong Jeon, Ju Hyun Lee, Min Hee Park, In Yeong Bae, Sang Heon Kim, Hye Jin Lee, Jinheung Kim
Three ruthenium complexes containing a bidentate piq ligand, [(piq)Ru(bpy)2]2+ (1), [(piq)Ru(phen)2]2+ (2), and [(piq)Ru(DIP)2]2+ (3) (piq = phenylisoquinolinate, bpy = 2,2'-bipyridine, phen = 1,10-phenanthroline, DIP = 4,7-diphenyl-1,10-phenanthroline), were prepared. The DNA binding properties of complexes 1-3 to double-stranded DNA were studied. The binding of 1-3 to calf-thymus DNA (ct-DNA) yielded lower emission intensities than those observed with the corresponding Ru complexes alone. To explore potential interactions of complexes 1-3 with lipid-rich organs in live cells, the emission properties of the Ru probes were studied with liposomes...
January 9, 2018: Journal of Inorganic Biochemistry
https://www.readbyqxmd.com/read/29328868/oral-sciences-phd-program-enrollment-graduates-and-placement-1994-to-2016
#15
C R Herzog, D W Berzins, P DenBesten, R L Gregory, K M Hargreaves, R L W Messer, M Mina, M P Mooney, M L Paine, C Phillips, R B Presland, R G Quivey, F A Scannapieco, J F Sheridan, K K H Svoboda, P C Trackman, M P Walker, S G Walker, C Y Wang, J C C Hu
For decades, dental schools in the United States have endured a significant faculty shortage. Studies have determined that the top 2 sources of dental faculty are advanced education programs and private practice. Those who have completed both DDS and PhD training are considered prime candidates for dental faculty positions. However, there is no national database to track those trainees and no evidence to indicate that they entered academia upon graduation. The objective of this study was to assess outcomes of dental school-affiliated oral sciences PhD program enrollment, graduates, and placement between 1994 and 2016...
January 1, 2018: Journal of Dental Research
https://www.readbyqxmd.com/read/29328785/immune-responses-in-the-liver
#16
Paul Kubes, Craig Jenne
The liver is a key, frontline immune tissue. Ideally positioned to detect pathogens entering the body via the gut, the liver appears designed to detect, capture, and clear bacteria, viruses, and macromolecules. Containing the largest collection of phagocytic cells in the body, this organ is an important barrier between us and the outside world. Importantly, as portal blood also transports a large number of foreign but harmless molecules (e.g., food antigens), the liver's default immune status is anti-inflammatory or immunotolerant; however, under appropriate conditions, the liver is able to mount a rapid and robust immune response...
January 12, 2018: Annual Review of Immunology
https://www.readbyqxmd.com/read/29325698/what-causes-childhood-stunting-among-children-of-san-vicente-guatemala-employing-complimentary-system-analysis-approaches
#17
Lee E Voth-Gaeddert, Matthew Stoker, Devin Cornell, Daniel B Oerther
Guatemala has the sixth worst stunting rate with 48% of children under five years of age classified as stunted according to World Health Organization standards. This study utilizes two different yet complimentary system-analysis approaches to analyze correlations among environmental and demographic variables, environmental enteric dysfunction (EED), and child height-for-age (stunting metric) in Guatemala. Two descriptive models constructed around applicable environmental and demographic factors on child height-for-age and EED were analyzed using Network Analysis (NA) and Structural Equation Modeling (SEM)...
January 5, 2018: International Journal of Hygiene and Environmental Health
https://www.readbyqxmd.com/read/29324288/description-of-an-orthologous-cluster-of-ochratoxin-a-biosynthetic-genes-in-aspergillus-and-penicillium-species-a-comparative-analysis
#18
Jessica Gil-Serna, Marta García-Díaz, María Teresa González-Jaén, Covadonga Vázquez, Belén Patiño
Ochratoxin A (OTA) is one of the most important mycotoxins due to its toxic properties and worldwide distribution which is produced by several Aspergillus and Penicillium species. The knowledge of OTA biosynthetic genes and understanding of the mechanisms involved in their regulation are essential. In this work, we obtained a clear picture of biosynthetic genes organization in the main OTA-producing Aspergillus and Penicillium species (A. steynii, A. westerdijkiae, A. niger, A. carbonarius and P. nordicum) using complete genome sequences obtained in this work or previously available on databases...
January 3, 2018: International Journal of Food Microbiology
https://www.readbyqxmd.com/read/29322466/using-rt-qpcr-for-quantifying-mycobacteria-marinum-from-in%C3%A2-vitro-and-in-vivo-samples
#19
Han Xaio, Stephen H Gillespie
Mycobacterium marinum, the causative agent of fish tuberculosis, is rarely a human pathogen causing a chronic skin infection. It is now wildely used as a model system in animal models, especially in zebra fish model, to study the pathology of tuberculosis and as a means of screening new anti-tuberculosis agent. To facilitate such research, quantifying the viable count of M. marinum bacteria is a crucial step. The main approach used currently is still by counting the number of colony forming units (cfu), a method that has been in place for almost 100 years...
2018: Methods in Molecular Biology
https://www.readbyqxmd.com/read/29322075/data-about-knowledge-and-tendency-towards-organic-foods-use-in-tehran
#20
Fariba Razeghi, Ehsan Haghi, Masoud Yunesian
Improper use of chemical fertilizer and pesticide poses not only threats to the environmental safety but also major public health issues globally. The adverse effects of chemical fertilizers and pesticides forced agricultural scientist to look for safer methods such as organic farming. This study was aimed at assessing the knowledge and tendency towards organic foods use among people of living in a megacity, Tehran. Data was collected from "fall exhibition" and "health food exhibition" participants using pretested questionnaire...
February 2018: Data in Brief
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