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https://www.readbyqxmd.com/read/29775998/high-pressure-raman-study-of-type-i-collagen
#1
Amalia Maria Paschou, Maria Katsikini, Dimitrios Christofilos, John Arvanitidis, Sotirios Ves
The high pressure response of type-I collagen from bovine Achilles tendon is investigated with micro-Raman spectroscopy. Fluorinert™ and methanol-ethanol mixtures were used as pressure transmitting media (PTM) in a diamond anvil cell. The Raman spectrum of collagen is dominated by three bands centred at approximately 1450, 1660 and 2930 cm-1 , attributed to C-H deformation, C=O stretching of the peptide bond (amide-I band) and C-H stretching modes, respectively. Upon pressure increase, using Fluorinert™ as PTM, a shift towards higher frequencies of the C-H stretching and deformation peaks is observed...
May 18, 2018: FEBS Journal
https://www.readbyqxmd.com/read/29775906/bioaugmentation-with-diaphorobacter-polyhydroxybutyrativorans-to-enhance-nitrate-removal-in-a-poly-3-hydroxybutyrate-co-3-hydroxyvalerate-supported-denitrification-reactor
#2
Shusong Zhang, Xingbin Sun, Xuming Wang, Tianlei Qiu, Min Gao, Yanmei Sun, Shoutao Cheng, Qingjing Zhang
A newly isolated and identified Diaphorobacter polyhydroxybutyrativorans strain (SL-205) was employed to enhance the denitrification performance of a laboratory-scale solid-phase denitrification (SPD) reactor using poly (3-hydroxybutyrate-co-3-hydroxyvalerate) (PHBV) as a carbon source, and dynamic variations in microbial communities in the reactor were investigated. Results indicated that bioaugmentation with strain SL-205 enabled rapid reactor startup and improved denitrification performance relative to the reactor inoculated with activated sludge...
May 9, 2018: Bioresource Technology
https://www.readbyqxmd.com/read/29775347/dirac-and-chiral-quantum-spin-liquids-on-the-honeycomb-lattice-in-a-magnetic-field
#3
Zheng-Xin Liu, B Normand
Motivated by recent experimental observations in α-RuCl_{3}, we study the K-Γ model on the honeycomb lattice in an external magnetic field. By a slave-particle representation and variational Monte Carlo calculations, we reproduce the phase transition from zigzag magnetic order to a field-induced disordered phase. The nature of this state depends crucially on the field orientation. For particular field directions in the honeycomb plane, we find a gapless Dirac spin liquid, in agreement with recent experiments on α-RuCl_{3}...
May 4, 2018: Physical Review Letters
https://www.readbyqxmd.com/read/29773812/strain-induced-electronic-structure-variation-in-methyl-ammonium-lead-iodide-perovskite
#4
Le Zhang, Wei Geng, Chuan-Jia Tong, Xueguang Chen, Tengfei Cao, Mingyang Chen
Methyl-ammonium lead iodide perovskite (CH3 NH3 PbI3 ) has drawn great attention due to its excellent photovoltaic properties. Because of its loosely compacted structure, the structural, electronic and optical properties of CH3 NH3 PbI3 are sensitive to external modulations. Strain effects on CH3 NH3 PbI3 are fully investigated by the first principles calculations. The results indicate that the inorganic framework deforms under compression or stretch and the embedded organic CH3 NH3 + molecules rotate correspondingly...
May 17, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29772210/in-silico-analysis-seasonal-variation-and-gonadotropic-regulation-of-jag1-and-its-receptor-notch1-in-testis-of-spotted-snakehead-channa-punctatus
#5
Alivia Roy, Reetuparna Basak, Umesh Rai
The present study in seasonally breeding spotted snakehead Channa punctatus, for the first time in nonmammalian vertebrates, demonstrated correlation between reproductive phase-dependent testicular expression of ligand Jag1/receptor Notch1 and spermatogenic events. Testicular transcriptome sequencing data from our earlier study in C. punctatus was used in the present study to select the best transcript for jag1 (cpjag1) and notch1 (cpnotch1). The transcripts cpjag1 and cpnotch1 encoded full-length putative proteins of 1215 (cpJag1) and 2475 (cpNotch1) amino acids, respectively...
May 14, 2018: General and Comparative Endocrinology
https://www.readbyqxmd.com/read/29771371/allele-phasing-greatly-improves-the-phylogenetic-utility-of-ultraconserved-elements
#6
Tobias Andermann, Alexandre M Fernandes, Urban Olsson, Mats Töpel, Bernard Pfeil, Bengt Oxelman, Alexandre Aleixo, Brant C Faircloth, Alexandre Antonelli
Advances in high-throughput sequencing techniques now allow relatively easy and affordable sequencing of large portions of the genome, even for non-model organisms. Many phylogenetic studies reduce costs by focusing their sequencing efforts on a selected set of targeted loci, commonly enriched using sequence capture. The advantage of this approach is that it recovers a consistent set of loci, each with high sequencing depth, which leads to more confidence in the assembly of target sequences. High sequencing depth can also be used to identify phylogenetically informative allelic variation within sequenced individuals, but allele sequences are infrequently assembled in phylogenetic studies...
May 15, 2018: Systematic Biology
https://www.readbyqxmd.com/read/29770457/abo-genotyping-with-next-generation-sequencing-to-resolve-heterogeneity-in-donors-with-serology-discrepancies
#7
Ping Chun Wu, Yin-Hung Lin, Lei Fang Tsai, Ming Hung Chen, Pei-Lung Chen, Shun-Chung Pai
BACKGROUND: ABO subtypes are characterized by the alteration of antigens present and their expression levels on red blood cells and many are linked to genetic changes in the ABO gene. Weakened expression of antigens should be identified to prevent transfusion reactions or ABO-incompatible transplantations. Genotyping can be applied to identify subtypes to complement serologic testing. Next-generation sequencing (NGS) has shown to provide sensitive and accurate genotyping results as well as valuable cis/trans information...
May 16, 2018: Transfusion
https://www.readbyqxmd.com/read/29770143/a-census-of-tandemly-repeated-polymorphic-loci-in-genic-regions-through-the-comparative-integration-of-human-genome-assemblies
#8
Loredana M Genovese, Filippo Geraci, Lucia Corrado, Eleonora Mangano, Romina D'Aurizio, Roberta Bordoni, Marco Severgnini, Giovanni Manzini, Gianluca De Bellis, Sandra D'Alfonso, Marco Pellegrini
Polymorphic Tandem Repeat (PTR) is a common form of polymorphism in the human genome. A PTR consists in a variation found in an individual (or in a population) of the number of repeating units of a Tandem Repeat (TR) locus of the genome with respect to the reference genome. Several phenotypic traits and diseases have been discovered to be strongly associated with or caused by specific PTR loci. PTR are further distinguished in two main classes: Short Tandem Repeats (STR) when the repeating unit has size up to 6 base pairs, and Variable Number Tandem Repeats (VNTR) for repeating units of size above 6 base pairs...
2018: Frontiers in Genetics
https://www.readbyqxmd.com/read/29769596/hcp-fcc-nucleation-in-bcc-iron-under-different-anisotropic-compressions-at-high-strain-rate-molecular-dynamics-study
#9
Jian-Li Shao, Pei Wang, Feng-Guo Zhang, An-Min He
Previous researches have revealed the importance of shear and the orientation dependence in the structural transition of iron. In this work, we introduce a series of shear deformations by adjusting the strain ratio between the longitudinal ([001]) and transversal ([010] and [100]) directions, and then investigate this structural transition under different anisotropic compressions with molecular dynamics simulations. It is found that the shear deformation can lower the transition pressure notably, and even change the nucleation structure and morphology...
May 16, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29769057/patterns-of-care-for-anal-cancer-in-the-united-states-a-comparison-between-academic-and-community-cancer-centers
#10
Victor E Pricolo, Matteo Bonvini, Carlo F Abelli
BACKGROUND: Management of squamous cell carcinoma of the anus (SCCA) is becoming more relevant, as its incidence increases. The purpose of this study was to investigate possible differences in patient population and care delivery for SCCA between academic and community cancer programs in the United States. METHODS: A review of available data from the American College of Surgeons Committee on Cancer National Cancer DataBase focused on gender, age, race, type of health insurance, comorbidity score, distance traveled for care, stage at diagnosis, and therapy utilization (surgery, chemotherapy, and radiation therapy) as first course of treatment (FCT)...
May 16, 2018: BMC Cancer
https://www.readbyqxmd.com/read/29769055/one-visceral-artery-may-be-enough-successful-pancreatectomy-in-a-patient-with-total-occlusion-of-the-celiac-and-superior-mesenteric-arteries
#11
Evangelos Tagkalos, Florian Jungmann, Hauke Lang, Stefan Heinrich
BACKGROUND: The anatomic variations of the visceral arteries are not uncommon. The liver arterial blood supply shows 50% variability between humans, with the most common anatomy being one hepatic artery arising from the celiac trunk and one pancreatico-duodenal arcade between the celiac trunk and the superior mesenteric artery. Occlusion of one artery are mostly asymptomatic but may become clinically relevant when surgery of the liver, bile duct or the pancreas is required. If these pathologies are not reversible, an oncologic pancreatic head resection cannot be performed...
May 16, 2018: BMC Surgery
https://www.readbyqxmd.com/read/29769053/understanding-conversations-about-alcohol-between-parents-and-their-15-17-year-olds-a-qualitative-study
#12
Alexandra Sawyer, Lester Coleman, Richard Cooke, Lisa Hodgson, Nigel Sherriff
BACKGROUND: There is an increasing awareness that parents can play an important role in shaping their children's attitudes towards alcohol and use of alcohol. However, there has been little research exploring the conversations parents have with their children about alcohol. The present study aims to address this gap by exploring conversations between parents and their 15-17 year old children. METHODS: Using a cross-sectional qualitative design, recruitment took place over two phases to allow a purposive maximum variation sample of parents and young people...
May 16, 2018: BMC Public Health
https://www.readbyqxmd.com/read/29768572/ontogenetic-shape-changes-and-sexual-dimorphism-in-aegla-marginata-bond-buckup-and-buckup-1994
#13
Carolina L Adam, Murilo Z Marochi, Setuko Masunari
A study on relative growth, sexual dimorphism and ontogenetic trajectory was carried out in a population of the aeglidAegla marginata coming from Barrinha River, Iguape River Basin, Tunas do Paraná, Paraná State, Brazil. The size the of morphological sexual maturity was estimated for males and females. The analysis of sexual dimorphism and ontogenetic trajectory were performed using geometric morphometric technique. Males reach maturity with 10.58 mm of carapace length (CL) and females with 10.38 mm CL. Sexual size dimorphism was only visible among adults, with males reaching larger sizes...
May 14, 2018: Anais da Academia Brasileira de Ciências
https://www.readbyqxmd.com/read/29768090/kinematic-differences-in-upper-limb-joints-between-flat-and-topspin-forehand-drives-in-competitive-male-tennis-players
#14
Cyril Genevois, Machar Reid, Thomas Creveaux, Isabelle Rogowski
The topspin tennis forehand drive has become a feature of modern game; yet, as compared to the serve, there has been little research analysing its kinematics. This is surprising given that there is considerably more variation in the execution of the topspin forehand. Our study is the first to examine the amplitude of upper limb joint rotations that produce topspin in the forehand drives of 14 male competitive tennis players using video-based motion analysis. Humerothoracic abduction (-)/adduction (+), extension (-) /flexion (+), and external (-)/internal (+) rotation, elbow extension (-) /flexion (+) and forearm supination (-)/pronation (+), wrist extension (-)/flexion (+) and ulnar (-)/radial (-) deviation were computed...
May 16, 2018: Sports Biomechanics
https://www.readbyqxmd.com/read/29767094/effect-of-dietary-incorporation-of-n-3-polyunsaturated-fatty-acids-rich-oil-sources-on-fatty-acid-profile-keeping-quality-and-sensory-attributes-of-broiler-chicken-meat
#15
Sridhar Kalakuntla, Nalini K Nagireddy, Arun K Panda, Narasimha Jatoth, Raghunandan Thirunahari, Ravinder R Vangoor
The present study was undertaken to investigate the effect of dietary replacement of commonly used vegetable oil (sunflower oil, SFO) with n-3 polyunsaturated fatty acids (PUFA) rich oil sources on broiler chicken performance, carcass yield, meat fatty acid composition, keeping quality and sensory attributes of meat. In the current experiment, 300 day-old Krishibro broiler chicks were randomly distributed to 5 dietary groups (50 replicates with 6 chicks in each) prepared by replacing SFO (2% and 3% of diet during starter and finisher periods, respectively) with n-3 PUFA rich soybean oil (SO), mustard oil (MO), linseed oil (LO) or fish oil (FO) on weight basis...
December 2017: Animal nutrition
https://www.readbyqxmd.com/read/29766432/cl-initiated-photo-oxidation-reactions-of-methyl-propionate-in-atmospheric-condition
#16
Ramya Cheramangalath Balan, Rajakumar Balla
Cl-initiated photo-oxidation reaction of methyl propionate was investigated experimentally using relative rate method. Gas chromatography/mass spectrometry (GC-MS) and GC/infrared spectroscopy (GC-IR) were used as analytical tools to follow the concentrations of reactants and products during reaction. The gas-phase kinetics of methyl propionate with Cl atoms was measured over the temperature range of 263-363 K at 760 Torr in N2 atmosphere using C2 H6 and C2 H4 as reference compounds. The temperature-dependent rate coefficient for the reaction of methyl propionate with Cl atom was obtained as k(T) = [(3...
May 15, 2018: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/29765696/behavioural-divergence-during-biological-invasions-a-study-of-cane-toads-rhinella-marina-from-contrasting-environments-in-hawai-i
#17
Jodie Gruber, Gregory Brown, Martin J Whiting, Richard Shine
Invasive species must deal with novel challenges, both from the alien environment and from pressures arising from range expansion per se (e.g. spatial sorting). Those conditions can create geographical variation in behaviour across the invaded range, as has been documented across regions of Australia invaded by cane toads; range-edge toads are more exploratory and willing to take risks than are conspecifics from the range-core. That behavioural divergence might be a response to range expansion and invasion per se , or to the different environments encountered...
April 2018: Royal Society Open Science
https://www.readbyqxmd.com/read/29765601/survey-and-analysis-of-crystal-polymorphism-in-organic-structures
#18
Kortney Kersten, Ramanpreet Kaur, Adam Matzger
With the intention of producing the most comprehensive treatment of the prevalence of crystal polymorphism among structurally characterized materials, all polymorphic compounds flagged as such within the Cambridge Structural Database (CSD) are analysed and a list of crystallographically characterized organic polymorphic compounds is assembled. Classifying these structures into subclasses of anhydrates, salts, hydrates, non-hydrated solvates and cocrystals reveals that there are significant variations in polymorphism prevalence as a function of crystal type, a fact which has not previously been recognized in the literature...
March 1, 2018: IUCrJ
https://www.readbyqxmd.com/read/29765379/-vitis-vinifera-l-fruit-diversity-to-breed-varieties-anticipating-climate-changes
#19
Antoine Bigard, Dargie T Berhe, Eleonora Maoddi, Yannick Sire, Jean-Michel Boursiquot, Hernan Ojeda, Jean-Pierre Péros, Agnès Doligez, Charles Romieu, Laurent Torregrosa
The wine industry is facing critical issues due to climate changes since production is established on very tight Genotype × Environment interaction bases. While, some cultivation practices may reduce adverse effects of abiotic stresses on the vines, e.g., the use of irrigation to mitigate drought, the deleterious impacts of warming on fruit development are difficult to manage. Elevated temperature alters grapevine fruit growth and composition, with a critical increase of the sugars/organic acids ratio. Select grapes with improved metabolite balances to offset high temperature effects is a valuable option to sustain viticulture...
2018: Frontiers in Plant Science
https://www.readbyqxmd.com/read/29765335/heart-rate-variability-during-a-joint-attention-task-in-toddlers-with-autism-spectrum-disorders
#20
Lucia Billeci, Alessandro Tonacci, Antonio Narzisi, Zaira Manigrasso, Maurizio Varanini, Francesca Fulceri, Caterina Lattarulo, Sara Calderoni, Filippo Muratori
Background: Autism Spectrum Disorders (ASD) are a heterogeneous group of neurodevelopmental disorders featuring early impairments in social domain, with autonomic nervous system (ANS) unbalance possibly representing a useful marker for such disturbances. Impairments in joint attention (JA) are one of the earliest markers of social deficits in ASD. In this study, we assessed the feasibility of using wearable technologies for characterizing the ANS response in ASD toddlers during the presentation of JA stimuli...
2018: Frontiers in Physiology
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