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https://www.readbyqxmd.com/read/28728031/applying-a-modified-donnan-model-to-describe-the-surface-complexation-of-chromate-to-iron-oxyhydroxide-agglomerates-with-heteromorphous-pores
#1
Zongsu Wei, Raphael Semiat
In this study, a modified Donnan model (mDM) is incorporated into surface complexation model (SCM) to better understand the physicochemical processes for adsorption of hexavalent chromium, Cr(VI), on porous iron oxyhydroxide agglomerates (IOAs). The mDM includes a chemical potential term μatt to account for ionic transport and electrostatic interaction in micropores (dmi<2nm) which is usually neglected in typical Donnan model (tDM). To estimate the parameters of mDM in a simple and accurate way, a rigorous protocol was presented...
July 11, 2017: Journal of Colloid and Interface Science
https://www.readbyqxmd.com/read/28720840/positioning-of-the-scrambled-receptor-requires-udp-glc-sterol-glucosyltransferase-80b1-in-arabidopsis-roots
#2
Victoria G Pook, Meera Nair, KookHui Ryu, James C Arpin, John Schiefelbein, Kathrin Schrick, Seth DeBolt
The biological function of sterol glucosides (SGs), the most abundant sterol derivatives in higher plants, remains uncertain. In an effort to improve our understanding of these membrane lipids we examined phenotypes exhibited by the roots of Arabidopsis (Arabidopsis thaliana) lines carrying insertions in the UDP-Glc:sterol glucosyltransferase genes, UGT80A2 and UGT80B1. We show that although ugt80A2 mutants exhibit significantly lower levels of total SGs they are morphologically indistinguishable from wild-type plants...
July 18, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28717325/tetracycline-resistance-phenotypes-and-genotypes-of-coagulase-negative-staphylococcal-isolates-from-bubaline-mastitis-in-egypt
#3
K A Abd El-Razik, A A Arafa, R H Hedia, E S Ibrahim
AIM: This study was devoted to elucidate the tetracycline resistance of coagulase-negative staphylococci (CNS) derived from normal and subclinical mastitic (SCM) buffaloes' milk in Egypt. MATERIALS AND METHODS: A total of 81 milk samples from 46 normal buffalo milk samples and 35 SCM buffalo milk samples at private dairy farms of Egypt were used in this study. CNS were identified using phenotypic and molecular methods (polymerase chain reaction [PCR]). CNS isolates were tested for tetracycline resistance using routine methods and multiplex PCR targeting tetracycline (tet) resistance genes followed by sequencing of positive PCR products and phylogenetic analysis...
June 2017: Veterinary World
https://www.readbyqxmd.com/read/28716941/cryptic-oxygen-cycling-in-anoxic-marine-zones
#4
Emilio Garcia-Robledo, Cory C Padilla, Montserrat Aldunate, Frank J Stewart, Osvaldo Ulloa, Aurélien Paulmier, Gerald Gregori, Niels Peter Revsbech
Oxygen availability drives changes in microbial diversity and biogeochemical cycling between the aerobic surface layer and the anaerobic core in nitrite-rich anoxic marine zones (AMZs), which constitute huge oxygen-depleted regions in the tropical oceans. The current paradigm is that primary production and nitrification within the oxic surface layer fuel anaerobic processes in the anoxic core of AMZs, where 30-50% of global marine nitrogen loss takes place. Here we demonstrate that oxygenic photosynthesis in the secondary chlorophyll maximum (SCM) releases significant amounts of O2 to the otherwise anoxic environment...
July 17, 2017: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/28716201/a-matched-case-control-study-comparing-udder-health-production-and-fertility-parameters-in-dairy-farms-before-and-after-the-eradication-of-bovine-virus-diarrhoea-in-switzerland
#5
A Tschopp, R Deiss, M Rotzer, S Wanda, B Thomann, G Schüpbach-Regula, M Meylan
An obligatory eradication programme for Bovine Virus Diarrhoea (BVD) was implemented in Switzerland in 2008. Between 2008 and 2012, all bovines were tested for antigen or antibodies against BVDV. By the year 2012, eradication was completed in the majority of farms. A decrease of the prevalence of persistently infected (PI) newborn calves was observed from 1.4% in 2008 to <0.02% in 2012. The objective of the present study was to assess the effects of BVD eradication on different parameters of animal health, production and fertility in Swiss dairy herds which had completed the eradication programme...
September 1, 2017: Preventive Veterinary Medicine
https://www.readbyqxmd.com/read/28710118/correction-for-wang-et-al-comparative-analysis-of-chromatin-binding-by-sex-comb-on-midleg-scm-and-other-polycomb-group-repressors-at-a-drosophila-hox-gene
#6
Liangjun Wang, Neal Jahren, Ellen L Miller, Carrie S Ketel, Daniel R Mallin, Jeffrey A Simon
No abstract text is available yet for this article.
August 1, 2017: Molecular and Cellular Biology
https://www.readbyqxmd.com/read/28708901/sex-specific-enhancement-of-palatability-driven-feeding-in-adolescent-rats
#7
Andrew T Marshall, Angela T Liu, Niall P Murphy, Nigel T Maidment, Sean B Ostlund
It has been hypothesized that brain development during adolescence perturbs reward processing in a way that may ultimately contribute to the risky decision making associated with this stage of life, particularly in young males. To investigate potential reward dysfunction during adolescence, Experiment 1 examined palatable fluid intake in rats as a function of age and sex. During a series of twice-weekly test sessions, non-food-deprived rats were given the opportunity to voluntarily consume a highly palatable sweetened condensed milk (SCM) solution...
2017: PloS One
https://www.readbyqxmd.com/read/28693960/the-lateral-backdoor-approach-to-open-thyroid-surgery-a-comparative-study
#8
R M Singaporewalla, B C Tan, A D Rao
INTRODUCTION: The traditionally taught technique for conventional open thyroidectomy is via a midline splitting of the strap muscles following a skin crease neck incision - midline approach (MA). The lateral "backdoor" approach (LA) uses the same central neck incision but approaches the thyroid gland between the anterior border of sternocleidomastoid (SCM) and strap muscles. This technique is usually reserved for re-do thyroid surgery. We compared the results of the two approaches in patients undergoing conventional thyroidectomy for the first time...
July 8, 2017: Asian Journal of Surgery
https://www.readbyqxmd.com/read/28690765/novel-therapeutic-effects-of-leonurine-on-ischemic-stroke-new-mechanisms-of-bbb-integrity
#9
Qiu-Yan Zhang, Zhi-Jun Wang, De-Miao Sun, Ying Wang, Peng Xu, Wei-Jun Wu, Xin-Hua Liu, Yi-Zhun Zhu
Stroke is a leading cause of morbidity and mortality globally. Leonurine (also named SCM-198), a compound extracted from Herba leonuri, was effective on the prevention of various cardiovascular and brain diseases. The purpose of this study was to explore the possible therapeutic potential of SCM-198 against ischemia reperfusion injury and underlying mechanisms. In the in vivo transient middle cerebral artery occlusion (tMCAO) rat model, we found that treatment with SCM-198 could decrease infarct volume and improve neurological deficit by protecting against blood-brain barrier (BBB) breakdown...
2017: Oxidative Medicine and Cellular Longevity
https://www.readbyqxmd.com/read/28687646/aerobiological-stability-of-different-species-of-gram-negative-bacteria-including-well-known-biothreat-simulants-in-single-cell-particles-and-cell-clusters-of-different-composition
#10
Marius Dybwad, Gunnar Skogan
The ability to perform controlled experiments with bioaerosols is a fundamental enabler of many bioaerosol research disciplines. A practical alternative to using hazardous biothreat agents, e.g. for detection equipment development and testing, involves using appropriate model organisms (simulants). Several species of Gram-negative bacteria have been used or proposed as biothreat simulants. The appropriateness of different bacterial genera, species, and strains as simulants is however still debated. Here we report aerobiological stability characteristics of four species of Gram-negative bacteria (Pantoea agglomerans, Serratia marcesens, Escherichia coli, and Xanthomonas arboricola) in single-cell particles and cell clusters produced using four spray liquids (H2O, phosphate-buffered saline[PBS], spent culture medium[SCM], and SCM:PBS mixture)...
July 7, 2017: Applied and Environmental Microbiology
https://www.readbyqxmd.com/read/28686422/synthesis-structure-and-magnetic-properties-of-1d-mn-iii-cn-6-mn-ii-dapsc-n-coordination-polymers-origin-of-unconventional-single-chain-magnet-behavior
#11
Valentina D Sasnovskaya, Vyacheslav A Kopotkov, Artem D Talantsev, Roman B Morgunov, Eduard B Yagubskii, Sergey V Simonov, Leokadiya V Zorina, Vladimir S Mironov
Two one-dimensional cyano-bridged coordination polymers, namely, {[Mn(II)(dapsc)][Mn(III)(CN)6][K(H2O)2.75(MeOH)0.5]}n·0.5n(H2O) (I) and {[Mn(II)(dapsc)][Mn(III)(CN)6][K(H2O)2(MeOH)2]}n (II), based on alternating high-spin Mn(II)(dapsc) (dapsc = 2,6-diacetylpyridine bis(semicarbazone)) complexes and low-spin orbitally degenerate hexacyanomanganate(III) complexes were synthesized and characterized structurally and magnetically. Static and dynamic magnetic measurements reveal a single-chain magnet (SCM) behavior of I with an energy barrier of Ueff ≈ 40 K...
July 7, 2017: Inorganic Chemistry
https://www.readbyqxmd.com/read/28683163/comparison-of-electrostatic-and-non-electrostatic-models-for-u-vi-sorption-on-aquifer-sediments
#12
Bhavna Arora, James A Davis, Nicolas F Spycher, Wenming Dong, Haruko M Wainwright
A non-electrostatic generalized composite surface complexation model (SCM) was developed for U(VI) sorption on contaminated F-Area sediments from the U.S. Department of Energy Savannah River Site, South Carolina. The objective of this study was to test if a simpler, semi-empirical, non-electrostatic U(VI) sorption model (NEM) could achieve the same predictive performance as a SCM with electrostatic correction terms in describing U(VI) plume evolution and long-term mobility. One-dimensional reactive transport simulations considering key hydrodynamic processes, Al and Fe minerals, as well as H(+) and U surface complexation, with and without electrostatic correction terms, were conducted...
July 6, 2017: Ground Water
https://www.readbyqxmd.com/read/28648089/evidence-of-activation-of-vagal-afferents-by-non-invasive-vagus-nerve-stimulation-an-electrophysiological-study-in-healthy-volunteers
#13
Romain Nonis, Kevin D'Ostilio, Jean Schoenen, Delphine Magis
Background Benefits of cervical non-invasive vagus nerve stimulation (nVNS) devices have been shown in episodic cluster headache and preliminarily suggested in migraine, but direct evidence of vagus nerve activation using such devices is lacking. Vagal somatosensory evoked potentials (vSEPs) associated with vagal afferent activation have been reported for invasive vagus nerve stimulation (iVNS) and non-invasive auricular vagal stimulation. Here, we aimed to show and characterise vSEPs for cervical nVNS. Methods vSEPs were recorded for 12 healthy volunteers who received nVNS over the cervical vagus nerve, bipolar electrode/DS7A stimulation over the inner tragus, and nVNS over the sternocleidomastoid (SCM) muscle...
January 1, 2017: Cephalalgia: An International Journal of Headache
https://www.readbyqxmd.com/read/28646274/population-pharmacokinetic-modeling-of-diltiazem-in-chinese-renal-transplant-recipients
#14
Xiao-Feng Guan, Dai-Yang Li, Wen-Jun Yin, Jun-Jie Ding, Ling-Yun Zhou, Jiang-Lin Wang, Rong-Rong Ma, Xiao-Cong Zuo
BACKGROUND AND OBJECTIVES: Diltiazem is a benzothiazepine calcium blocker and widely used in renal transplant patients since it improves the level of tacrolimus or cyclosporine A concentration. Several population pharmacokinetic (PopPK) models had been established for cyclosporine A and tacrolimus but no specific PopPK model was established for diltiazem. The aim of the study is to develop a PopPK model for diltiazem in renal transplant recipients and provide relevant pharmacokinetic parameters of diltiazem for further pharmacokinetic interaction study...
June 23, 2017: European Journal of Drug Metabolism and Pharmacokinetics
https://www.readbyqxmd.com/read/28645915/cebranopadol-blocks-the-escalation-of-cocaine-intake-and-conditioned-reinstatement-of-cocaine-seeking-in-rats
#15
Giordano de Guglielmo, Alessandra Matzeu, Jenni Kononoff, Julia Mattioni, Remi Martin-Fardon, Olivier George
Cebranopadol is a novel agonist of nociceptin/orphanin FQ peptide (NOP) and opioid receptors with analgesic properties that is being evaluated in clinical Phase 2 and Phase 3 trials for the treatment of chronic and acute pain. Recent evidence indicates that the combination of opioid and NOP receptor agonism may be a new treatment strategy for cocaine addiction. We sought to extend these findings by examining the effects of cebranopadol on cocaine self-administration (0.5 mg/kg/infusion) and cocaine conditioned reinstatement in rats with extended access to cocaine...
June 23, 2017: Journal of Pharmacology and Experimental Therapeutics
https://www.readbyqxmd.com/read/28639553/can-we-improve-pressure-feedback-methods-in-vestibular-evoked-myogenic-potentials-by-applying-custom-pressures
#16
Ömer Afşin Özmen, Kasım Özlük, Süay Özmen, Oğuz Basut
OBJECTIVE: The aim of the present study was to use constant and customized pressure levels to improve the feedback method of the blood pressure cuff technique in order to decrease intra-subject and inter-subject variability. MATERIALS AND METHODS: The study was conducted in two stages. In the first stage, the relationship between the pressure level generated in the blood pressure cuff and electromyographic response in the sternocleidomastoid (SCM) muscle was investigated...
June 21, 2017: Journal of International Advanced Otology
https://www.readbyqxmd.com/read/28623695/injectable-cytocompatible-elastic-free-radical-scavenging-and-electroconductive-hydrogel-for-cardiac-cell-encapsulation
#17
Remya Komeri, Jayabalan Muthu
The injectable electroconductive hydrogels are desirable for the regenerative therapy of electroresponsive tissues like heart. With the present electroconductive hydrogels, the issues of cytotoxicity, biodegradability, and diffusion of the conductive element and poor water solubility limit their applications. Here, electroconductive injectable single component hydrogels, PANIE-P/PEGDA and PANIS-P/PEGDA, are prepared with fumarate-co-PEG-co-sebacate comacromer conjugated with non-sulfonated/sulfonated polyaniline and PEGDA...
June 1, 2017: Colloids and Surfaces. B, Biointerfaces
https://www.readbyqxmd.com/read/28612363/the-effect-of-dental-health-education-on-pregnant-women-s-adherence-with-toothbrushing-and-flossing-a-randomized-control-trial
#18
Suad Al Khamis, Koula Asimakopoulou, Tim Newton, Blanaid Daly
OBJECTIVES: In a three-arm randomized control trial, this study compared the efficacy of dental health education (DHE) with or without a planning intervention on adherence to oral health-related behaviours. METHODS: Women (N=154) in their second trimester of pregnancy attending three maternal healthcare clinics in Kuwait completed an assessment of social cognitions and oral health behaviours before a debris and gingival assessment (Plaque Index [PI], Gingival Index [GI]) was undertaken; this was repeated at 1 month...
June 14, 2017: Community Dentistry and Oral Epidemiology
https://www.readbyqxmd.com/read/28599006/long-term-cryopreservation-of-decellularised-oesophagi-for-tissue-engineering-clinical-application
#19
Luca Urbani, Panagiotis Maghsoudlou, Anna Milan, Maria Menikou, Charlotte Klara Hagen, Giorgia Totonelli, Carlotta Camilli, Simon Eaton, Alan Burns, Alessandro Olivo, Paolo De Coppi
Oesophageal tissue engineering is a therapeutic alternative when oesophageal replacement is required. Decellularised scaffolds are ideal as they are derived from tissue-specific extracellular matrix and are non-immunogenic. However, appropriate preservation may significantly affect scaffold behaviour. Here we aim to prove that an effective method for short- and long-term preservation can be applied to tissue engineered products allowing their translation to clinical application. Rabbit oesophagi were decellularised using the detergent-enzymatic treatment (DET), a combination of deionised water, sodium deoxycholate and DNase-I...
2017: PloS One
https://www.readbyqxmd.com/read/28594857/noninvasive-assessment-of-respiratory-muscle-strength-and-activity-in-myotonic-dystrophy
#20
Morgana de Araújo Evangelista, Fernando Augusto Lavezzo Dias, Mário Emílio Teixeira Dourado Júnior, George Carlos do Nascimento, Antonio Sarmento, Lucien Peroni Gualdi, Andrea Aliverti, Vanessa Resqueti, Guilherme Augusto de Freitas Fregonezi
OBJECTIVE: To evaluate sensitivity/specificity of the maximum relaxation rate (MRR) of inspiratory muscles, amplitude of electromyographic activity of the sternocleidomastoid (SCM), scalene (SCA), parasternal (2ndIS) and rectus abdominis (RA) muscles; lung function and respiratory muscle strength in subjects with Myotonic dystrophy type 1 (DM1) compared with healthy subjects. DESIGN AND METHODS: Quasi-experimental observational study with control group. MRR of inspiratory muscles, lung function and amplitude of the electromyographic activity of SCM, SCA, 2ndIS and RA muscles during maximum inspiratory pressure (PImax), maximum expiratory pressure (PEmax) and sniff nasal inspiratory pressure (SNIP) tests were assessed in eighteen DM1 subjects and eleven healthy...
2017: PloS One
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