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https://www.readbyqxmd.com/read/28817926/yeast-multistress-resistance-and-lag-phase-characterisation-during-wine-fermentation
#1
David Ferreira, Virginie Galeote, Isabelle Sanchez, Jean-Luc Legras, Anne Ortiz-Julien, Sylvie Dequin
Saccharomyces cerevisiae has been used to perform wine fermentation for several millennia due to its endurance and unmatched qualities. Nevertheless, at the moment of inoculation, wine yeasts must cope with specific stress factors that still challenge wine makers by slowing down or compromising the fermentation process. To better assess the role of genetic and environmental factors that govern multistress resistance during the wine fermentation lag phase, we used a factorial plan to characterise the individual and combined impact of relevant stress factors on eight S...
September 1, 2017: FEMS Yeast Research
https://www.readbyqxmd.com/read/28817773/surface-reaction-barriometry-methane-dissociation-on-flat-and-stepped-transition-metal-surfaces
#2
Davide Migliorini, Helen Jane Chadwick, Francesco Nattino, Ana Gutiérrez-Gonzáles, Eric Dombrowski, Eric A High, Han Guo, Arthur L Utz, Bret Earl Jackson, Rainer D Beck, Geert-Jan Kroes
Accurately simulating heterogeneously catalyzed reactions requires reliable barriers for molecules reacting at defects on metal surfaces, such as steps. However, first principles methods capable of computing these barriers to chemical accuracy have yet to be demonstrated. We show that state-resolved molecular beam experiments combined with ab initio molecular dynamics using specific reaction parameter density functional theory (SRP-DFT) can determine the molecule-metal surface interaction with the required reliability...
August 17, 2017: Journal of Physical Chemistry Letters
https://www.readbyqxmd.com/read/28817720/targeting-of-cdk9-with-indirubin-3-monoxime-safely-and-durably-reduces-hiv-viremia-in-chronically-infected-humanized-mice
#3
Sandra Medina-Moreno, Thomas C Dowling, Juan C Zapata, Nhut M Le, Edward Sausville, Joseph Bryant, Robert R Redfield, Alonso Heredia
Successful propagation of HIV in the human host requires entry into a permissive cell, reverse transcription of viral RNA, integration into the human genome, transcription of the integrated provirus, and assembly/release of new virus particles. Currently, there are antiretrovirals against each of these viral steps, except for provirus transcription. An inhibitor of HIV transcription could both increase potency of treatment and suppress drug-resistant strains. Cellular cyclin-dependent kinase 9 (CDK9) serves as a cofactor for the HIV Tat protein and is required for effective transcription of the provirus...
2017: PloS One
https://www.readbyqxmd.com/read/28817701/effect-of-exoskeletal-joint-constraint-and-passive-resistance-on-metabolic-energy-expenditure-implications-for-walking-in-paraplegia
#4
Sarah R Chang, Rudi Kobetic, Ronald J Triolo
An important consideration in the design of a practical system to restore walking in individuals with spinal cord injury is to minimize metabolic energy demand on the user. In this study, the effects of exoskeletal constraints on metabolic energy expenditure were evaluated in able-bodied volunteers to gain insight into the demands of walking with a hybrid neuroprosthesis after paralysis. The exoskeleton had a hydraulic mechanism to reciprocally couple hip flexion and extension, unlocked hydraulic stance controlled knee mechanisms, and ankles fixed at neutral by ankle-foot orthoses...
2017: PloS One
https://www.readbyqxmd.com/read/28817674/new-insights-into-the-distribution-protein-abundance-and-subcellular-localisation-of-the-endogenous-peroxisomal-biogenesis-proteins-pex3-and-pex19-in-different-organs-and-cell-types-of-the-adult-mouse
#5
Claudia Colasante, Jiangping Chen, Barbara Ahlemeyer, Rocio Bonilla-Martinez, Srikanth Karnati, Eveline Baumgart-Vogt
Peroxisomes are ubiquitous organelles mainly involved in ROS and lipid metabolism. Their abundance, protein composition and metabolic function vary depending on the cell type and adjust to different intracellular and environmental factors such as oxidative stress or nutrition. The biogenesis and proliferation of these important organelles are regulated by proteins belonging to the peroxin (PEX) family. PEX3, an integral peroxisomal membrane protein, and the cytosolic shuttling receptor PEX19 are thought to be responsible for the early steps of peroxisome biogenesis and assembly of their matrix protein import machinery...
2017: PloS One
https://www.readbyqxmd.com/read/28817643/peripheral-clinic-versus-centralized-laboratory-based-xpert-mtb-rif-performance-experience-gained-from-a-pragmatic-stepped-wedge-trial-in-botswana
#6
Tefera Agizew, Rosanna Boyd, Ndwapi Ndwapi, Andrew Auld, Joyce Basotli, Sambayawo Nyirenda, Zegabriel Tedla, Anikie Mathoma, Unami Mathebula, Chawangwa Lesedi, Sherri Pals, Anand Date, Heather Alexander, Thomas Kuebrich, Alyssa Finlay
BACKGROUND: In 2011, the Botswana National Tuberculosis Program adopted World Health Organization guidelines and introduced Xpert MTB/RIF (Xpert) assay to support intensified case finding among people living with HIV enrolling in care. An evaluation was designed to assess performance under operational conditions to inform the national Xpert scale-up. METHODS: Xpert was implemented from August 2012 through November 2014 with 13 GeneXpert instruments (GeneXpert) deployed in a phased approach over nine months: nine centralized laboratory and four point-of-care (POC) peripheral clinics...
2017: PloS One
https://www.readbyqxmd.com/read/28817611/the-directed-migration-of-gonadal-distal-tip-cells-in-caenorhabditis-elegans-requires-ngat-1-a-%C3%A3-1-4-n-acetylgalactosaminyltransferase-enzyme
#7
Joseph Veyhl, Robert J Dunn, Wendy L Johnston, Alexa Bennett, Lijia W Zhang, James W Dennis, Harry Schachter, Joseph G Culotti
Glycoproteins such as growth factor receptors and extracellular matrix have well-known functions in development and cancer progression, however, the glycans at sites of modification are often heterogeneous molecular populations which makes their functional characterization challenging. Here we provide evidence for a specific, discrete, well-defined glycan modification and regulation of a stage-specific cell migration in Caenorhabditis elegans. We show that a chain-terminating, putative null mutation in the gene encoding a predicted β1,4-N-acetylgalactosaminyltransferase, named ngat-1, causes a maternally rescued temperature sensitive (ts) defect in the second phase of the three phase migration pattern of the posterior, but not the anterior, hermaphrodite Distal Tip Cell (DTC)...
2017: PloS One
https://www.readbyqxmd.com/read/28817575/mck1-is-a-novel-regulator-of-myo-inositol-phosphate-synthase-mips-that-is-required-for-inhibition-of-inositol-synthesis-by-the-mood-stabilizer-valproate
#8
Wenxi Yu, Joshua Daniel, Dhara Mehta, Krishna Rao Maddipati, Miriam L Greenberg
Myo-inositol, the precursor of all inositol compounds, is essential for the viability of eukaryotes. Identifying the factors that regulate inositol homeostasis is of obvious importance to understanding cell function and the pathologies underlying neurological and metabolic resulting from perturbation of inositol metabolism. The current study identifies Mck1, a GSK3 homolog, as a novel positive regulator of inositol de novo synthesis in yeast. Mck1 was required for normal activity of myo-inositol phosphate synthase (MIPS), which catalyzes the rate-limiting step of inositol synthesis...
2017: PloS One
https://www.readbyqxmd.com/read/28817568/an-optimal-strategy-for-epilepsy-surgery-disruption-of-the-rich-club
#9
Marinho A Lopes, Mark P Richardson, Eugenio Abela, Christian Rummel, Kaspar Schindler, Marc Goodfellow, John R Terry
Surgery is a therapeutic option for people with epilepsy whose seizures are not controlled by anti-epilepsy drugs. In pre-surgical planning, an array of data modalities, often including intra-cranial EEG, is used in an attempt to map regions of the brain thought to be crucial for the generation of seizures. These regions are then resected with the hope that the individual is rendered seizure free as a consequence. However, post-operative seizure freedom is currently sub-optimal, suggesting that the pre-surgical assessment may be improved by taking advantage of a mechanistic understanding of seizure generation in large brain networks...
August 2017: PLoS Computational Biology
https://www.readbyqxmd.com/read/28817537/echocardiography-in-patients-undergoing-cardioversion-for-atrial-fibrillation-and-inadequate-anticoagulation-a-step-beyond-towards-maximum-safety
#10
Paolo Colonna, Ilaria Dentamaro
No abstract text is available yet for this article.
August 9, 2017: Polish Archives of Internal Medicine
https://www.readbyqxmd.com/read/28817522/a-graphical-guide-to-the-reboa-five-life-saving-steps
#11
Jonathan P Wanderer, Naveen Nathan
No abstract text is available yet for this article.
September 2017: Anesthesia and Analgesia
https://www.readbyqxmd.com/read/28817521/supporting-doctoral-students-and-faculty-the-development-of-an-annual-doctoral-symposium
#12
Rebecca M Wheeler
AIM: The aim of the study was to develop a sustainable annual symposium to support doctoral students in nursing across the state of Georgia. BACKGROUND: A goal of the nursing profession, highlighted in the Institute of Medicine Future of Nursing report of 2011, is to increase the number of nurses with doctorates. They are needed to fill faculty positions as professors retire and to step into leadership positions as health care systems become more complex. METHOD: The Georgia Nursing Leadership Coalition developed a Doctoral Symposium in 2014 that has been repeated annually...
September 2017: Nursing Education Perspectives
https://www.readbyqxmd.com/read/28817486/overcoming-clopidogrel-resistance-three-promising-novel-antiplatelet-drugs-developed-in-china
#13
Hong-Guang Xie, Yu-Meng Jia, Ting Tai, Jin-Zi Ji
Clopidogrel is one of the most frequently prescribed drugs worldwide; however, the presence of clopidogrel resistance and high susceptibility to genetic variations and drug interactions are facilitating the development of other antiplatelet drugs. To overcome clopidogrel resistance, several promising clopidogrel analogues have been developed in China, such as vicagrel (and its deuterated analogues), PLD-301, and W1. These novel chemical analogues are all characterized by much faster and more efficient bioconversion to clopidogrel thiolactone (or 2-oxo-clopidogrel, the precursor of clopidogrel active metabolite) in the intestine than clopidogrel through bypassing the first-step P450-mediated oxidation of clopidogrel in the liver...
August 4, 2017: Journal of Cardiovascular Pharmacology
https://www.readbyqxmd.com/read/28817433/class-wide-access-to-a-commercial-step-1-question-bank-during-preclinical-organ-based-modules-a-pilot-project
#14
James H Baños, Mark E Pepin, Nicholas Van Wagoner
PURPOSE: The authors examined the usefulness of a commercially available Step 1 question bank as a formative academic support tool throughout organ-based modules in an integrated preclinical medical curriculum. The authors also determined the extent to which correlation between question bank utilization and academic metrics varied with Medical College Admission Test (MCAT) scores. METHOD: In 2015, a cohort of 185 first-year medical students at University of Alabama School of Medicine were provided with 18-month full access to a commercially available Step 1 question bank of over 2,100 items throughout organ-based modules, although there were no requirements for use...
August 16, 2017: Academic Medicine: Journal of the Association of American Medical Colleges
https://www.readbyqxmd.com/read/28817415/new-model-of-vincristine-induced-neuropathic-pain-in-children-a-first-step-towards-prediction-and-prevention
#15
Maria Fitzgerald
No abstract text is available yet for this article.
September 2017: Pain
https://www.readbyqxmd.com/read/28817392/minimum-operational-standards-for-24-7-available-emergency-departments-in-the-netherlands-a-first-step-taken-by-emergency-physicians-using-an-e-delphi-approach
#16
Menno I Gaakeer, Rebekka Veugelers, Peter Patka, Robbert Huijsman
OBJECTIVE: The objective of this study was to effectuate a consensus of emergency physicians on minimum requirements for facility, diagnostic, and medical specialist availability as a first step toward minimum operational standards for 24/7 available emergency departments (EDs) in the Netherlands. PATIENTS AND METHODS: A two-part e-Delphi through online survey was performed between January 2015 and May 2016, using a panel of 20 experts in emergency medicine. The aim of part I was to reach an agreement on a list of possible ED elements and their definitions...
August 16, 2017: European Journal of Emergency Medicine: Official Journal of the European Society for Emergency Medicine
https://www.readbyqxmd.com/read/28817361/twelve-tips-for-creating-an-academic-teaching-portfolio
#17
Kim Little-Wienert, Mark Mazziotti
An academic teaching portfolio is not only a requirement at many academic teaching institutions, but it is also important in a medical educator's growth and development through documentation, reflection, evaluation, and change. Creating an academic portfolio may appear daunting at first but with careful advanced preparation, organized evidence collection of your educational work, proof of scholarship, and thorough documentation of self-reflection and change, you can produce a successful product that accurately represents your educational beliefs, accomplishments, and growth throughout your career...
August 17, 2017: Medical Teacher
https://www.readbyqxmd.com/read/28817312/disulfide-mapping-planner-software-tool
#18
Andreas M Kist, Angelika Lampert, Andrias O O'Reilly
Disulfide bridges are side-chain-mediated covalent bonds between cysteines that stabilize many protein structures. Disulfide mapping experiments to resolve these linkages typically involve proteolytic cleavage of the protein of interest followed by mass spectroscopy to identify fragments corresponding to linked peptides. Here we report the sequence-based "DIMPL" web tool to facilitate the planning and analysis steps of experimental mapping studies. The software tests permutations of user-selected proteases to determine an optimal peptic digest that produces cleavage between cysteine residues, thus separating each to an individual peptide fragment...
August 17, 2017: Journal of Computational Biology: a Journal of Computational Molecular Cell Biology
https://www.readbyqxmd.com/read/28817273/single-step-synthesis-of-iodinated-oxazoles-from-n-propargyl-amides-mediated-by-i2-iodosylbenzene-tmsotf-systems
#19
Sho Suzuki, Akio Saito
A combination of I2, iodosylbenzene and TMSOTf is effective on a single-step synthesis of iodinated oxazoles from N-propargyl amides via the aromatization of the iodocyclized intermediates, which is difficult to proceed by the conventional iodocyclization methods. Compared to the former method consisting of the metal-catalyzed cyclization of N-propargyl amides followed by halogenation of alkylideneoxazolines, the present reaction provides facile and metal-free procedure.
August 17, 2017: Journal of Organic Chemistry
https://www.readbyqxmd.com/read/28817239/novel-dissection-of-the-central-nervous-system-to-bridge-gross-anatomy-and-neuroscience-for-an-integrated-medical-curriculum
#20
Rebecca J Hlavac, Rachel Klaus, Kourtney Betts, Shilo M Smith, Maureen E Stabio
Medical schools in the United States continue to undergo curricular change, reorganization, and reformation as more schools transition to an integrated curriculum. Anatomy educators must find novel approaches to teach in a way that will bridge multiple disciplines. The cadaveric extraction of the central nervous system (CNS) provides an opportunity to bridge gross anatomy, neuroanatomy, and clinical neurology. In this dissection, the brain, brainstem, spinal cord, cauda equina, optic nerve/tract, and eyes are removed in one piece so that the entire CNS and its gateway to the periphery through the spinal roots can be appreciated...
August 17, 2017: Anatomical Sciences Education
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