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https://www.readbyqxmd.com/read/29353409/16s-rrna-gene-sequencing-reveals-altered-composition-of-gut-microbiota-in-individuals-with-kidney-stones
#1
Ruiqiang Tang, Yonghua Jiang, Aihua Tan, Juan Ye, Xiaoying Xian, Yuanliang Xie, Qiuyan Wang, Ziting Yao, Zengnan Mo
Nephrolithiasis is a common urological disease with high prevalence and recurrence rates. Characterizing gut microbiome profiles of nephrolithiasis patients may provide valuable insights and potential biomarkers for the disease. Therefore, we explored the relation between gut microbiome and nephrolithiasis using 16S ribosomal RNA (rRNA) gene sequencing. 13 patients with multiple kidney stones and 13 matched healthy controls were recruited. A decreasing trend in number of observed species in nephrolithiasis patients was detected, although statistical significance was not reached (p = 0...
January 20, 2018: Urolithiasis
https://www.readbyqxmd.com/read/29353170/transgenerational-effects-of-ocean-warming-on-the-sea-urchin-strongylocentrotus-intermedius
#2
Chong Zhao, Lisheng Zhang, Dongtao Shi, Jingyun Ding, Donghong Yin, Jiangnan Sun, Baojing Zhang, Lingling Zhang, Yaqing Chang
Transgenerational effects, which involve both selection and plasticity, are important for the evolutionary adaptation of echinoderms in the changing ocean. Here, we investigated the effects of breeding design and water temperature for offspring on fertilization, hatchability, larval survival, size, abnormality and metamorphosis of the sea urchin Strongylocentrotus intermedius, whose dams and sires were exposed to long-term (~15 months) elevated temperature (~3°C above ambient) or ambient temperature. There was no transgenerational effect on fertilization and metamorphosis of S...
January 17, 2018: Ecotoxicology and Environmental Safety
https://www.readbyqxmd.com/read/29353116/scale-inhibition-and-flocculation-dual-functionality-of-poly-acrylic-acid-grafted-starch
#3
Qing Du, Yawen Wang, Aimin Li, Hu Yang
Natural-polymer based water treatment agents have recently received much more attention due to their environmental friendliness, widespread availability, and prominent structural features. Starch-graft-poly(acrylic acid) (St-g-PAA) is a simple natural-polymer based material that can be obtained easily by a one-step graft copolymerization. When used as a water treatment agent, St-g-PAA exhibits both effective scale-inhibition performance and high turbidity removal efficiency. The scale-inhibition efficiency of St-g-PAA against calcium carbonate (CaCO3) is approximately 94% at the optimal dose in a static test of approximately 40 mg/L...
January 17, 2018: Journal of Environmental Management
https://www.readbyqxmd.com/read/29353006/comparing-the-portion-size-effect-in-women-with-and-without-extended-training-in-portion-control-a-follow-up-to-the-portion-control-strategies-trial
#4
Faris M Zuraikat, Liane S Roe, Christine E Sanchez, Barbara J Rolls
Following a 1-year randomized controlled trial that tested how weight loss was influenced by different targeted strategies for managing food portions, we evaluated whether the effect of portion size on intake in a controlled setting was attenuated in trained participants compared to untrained controls. Subjects were 3 groups of women: 39 participants with overweight and obesity from the Portion-Control Strategies Trial, 34 controls with overweight and obesity, and 29 controls with normal weight. In a crossover design, on 4 different occasions subjects were served a meal consisting of 7 foods that differed in energy density (ED)...
January 15, 2018: Appetite
https://www.readbyqxmd.com/read/29352980/effect-of-two-cooling-protocols-on-the-post-thaw-characteristics-of-iberian-ibex-sperms
#5
Milagros C Esteso, Adolfo Toledano-Díaz, Cristina Castaño, Jorgea Pradiee, Antonio Lopez-Sebastián, Julián Santiago-Moreno
The rate at which lethal intracellular ice forms during sperm cryopreservation is highly dependent on the cooling protocol. The present work compares two cooling protocols for use with Iberian ibex (Capra pyrenaica) sperm by assessing the effects on the motility, viability, and size of frozen-thawed sperm cells. Ejaculates, obtained from six adult ibex males via transrectal, ultrasound-guided massage of the accessory sex glands plus electroejaculation if necessary, were cooled via either 1) Protocol 1 (decelerating cooling), involving cooling in liquid nitrogen vapor from 5 °C to -35 °C (40 °C/min), from -35 °C to -65 °C (17 °C/min), and then from -65 °C to -85 °C (3 °C/min); or 2) Protocol 2 (accelerating cooling) involving cooling in a biological freezer from 5 °C to -5 °C (4 °C/min), from -5 °C to -110 °C (25 °C/min), and then from -110 °C to -140 °C (35 °C/min)...
January 15, 2018: Cryobiology
https://www.readbyqxmd.com/read/29352945/silylation-and-characterization-of-microcrystalline-cellulose-isolated-from-indonesian-native-oil-palm-empty-fruit-bunch
#6
Septi Pujiasih, Kurnia, Abu Masykur, Triana Kusumaningsih, Ozi Adi Saputra
Silylation of microcrystalline cellulose (MCC), isolated from Indonesian native oil palm empty fruit bunch (OPEFB), using aminosilane compound synthesized through aminolysis of 3-glycidoxypropyltrimethoxysilane (GPTMS) with ethylenediamine (EDA) has been conducted in this study. Generally, there are three steps performed to isolate MCC before silylation process, i.e. bleaching, alkaline treatment and acid hydrolysis. All products resulted from bleaching, alkaline and acid hydrolysis treatments were characterized using Fourier Transform Infrared (FTIR) spectroscopy...
March 15, 2018: Carbohydrate Polymers
https://www.readbyqxmd.com/read/29352930/an-efficient-approach-to-prepare-sulfated-polysaccharide-and-evaluation-of-anti-tumor-activities-in-vitro
#7
Junlong Wang, Aijuan Bao, Xinhua Meng, Hongyun Guo, Yongdong Zhang, Yali Zhao, Weibao Kong, Junyu Liang, Jian Yao, Ji Zhang
Use of microwave radiation is one of the most potential techniques in polysaccharide derivatives synthesis due to its advantages such as higher yields, milder reaction conditions and shorter reaction times. This study was aimed at producing sulfated polysaccharides by microwave irradiation using polar reagents and solvent. Six sulfated Artemisia sphaerocephala polysaccharide derivatives (SPAS) were obtained by using chlorosulfuric acid/pyridine method in the reaction duration range of 15-300 min at a fixed microwave power of 100W...
March 15, 2018: Carbohydrate Polymers
https://www.readbyqxmd.com/read/29352920/biomass-based-magnetic-fluorescent-nanoparticles-one-step-scalable-synthesis-application-as-drug-carriers-and-mechanism-study
#8
Lei Li, Feijun Wang, Ziqiang Shao
A biomass-based magnetic fluorescent nanoparticle (MFNPs) was successively in situ synthesized via a one-step high-gravity approach, which constructed by a magnetic core of Fe3O4 nanoparticles, the fluorescent marker of carbon dots (CDs), and shells of chitosan (CS). The obtained MFNPs had a 10 nm average diameter and narrow particle size distribution, low cytotoxicity, superior fluorescent emission and superparamagnetic properties. The encapsulating and release 5-fluorouracil experiments confirmed that the introduction of CS/CDs effectively improved the drug loading capacity...
March 15, 2018: Carbohydrate Polymers
https://www.readbyqxmd.com/read/29352891/efficient-gene-delivery-by-oligochitosan-conjugated-serum-albumin-facile-synthesis-polyplex-stability-and-transfection
#9
Monika Kumari, Chi-Hsien Liu, Wei-Chi Wu
Chitosan and its derivatives have shown to be potential gene carriers with biocompatiblility and safety. However, their practical delivery is far from being ideal because of the low transfection efficiency. The present work describes the potential of a natural protein, bovine serum albumin (BSA), conjugated with a natural oligosaccharide, oligochitosan (OC), as a considerable promising approach for a safe and efficient non-viral gene delivery vector. The FTIR spectra proved the effective conjugation of BSA with OC through covalent bond...
March 1, 2018: Carbohydrate Polymers
https://www.readbyqxmd.com/read/29352871/a-novel-approach-for-fabricating-nanocomposite-materials-by-embedding-stabilized-core-shell-micelles-into-polysaccharide-cryogel-matrix
#10
Viktoria Pencheva, Elena Margaritova, Maria Borinarova, Marta Slavkova, Denitsa Momekova, Petar D Petrov
We report a novel approach for fabricating nanocomposite polysaccharide-based carriers for sustained delivery of poorly-water-soluble drugs by embedding stabilized core-shell micelles (SPM) possessing hydrophobic cores into super-macroporous hydroxypropyl cellulose (HPC) cryogels. Firstly, nano-sized SPM were synthesized by loading and photochemical crosslinking of pentaerythritoltetraacrylate (PETA) in poly(ethylene oxide)-b-poly(propylene oxide)-b-poly(ethylene oxide) (PEO19PPO29PEO19) core-shell micelles...
March 1, 2018: Carbohydrate Polymers
https://www.readbyqxmd.com/read/29352869/positively-charged-gold-nanoparticles-capped-with-folate-quaternary-chitosan-synthesis-cytotoxicity-and-uptake-by-cancer-cells
#11
Hui-Ju Yen, Yen-An Young, Tsung-Neng Tsai, Kuang-Ming Cheng, Xin-An Chen, Ying-Chuan Chen, Cheng-Cheung Chen, Jenn-Jong Young, Po-da Hong
In this study, we synthesized various quaternary chitosan derivatives and used them to stabilize gold nanoparticles (AuNPs). These chitosan derivatives comprised N-(2-hydroxy)propyl-3-trimethylammonium chitosan chloride (HTCC), folate-HTCC, galactosyl-HTCC, and their fluorescein isothiocyanate-conjugated derivatives. Various positively surface-charged AuNPs were prepared under alkaline conditions using glucose as a reducing agent in the presence of the HTCC derivatives (HTCCs). The effects of the concentration of NaOH, glucose, and HTCCs on the particles size, zeta potential, and stability were studied in detail...
March 1, 2018: Carbohydrate Polymers
https://www.readbyqxmd.com/read/29352800/efficient-reactive-brownian-dynamics
#12
Aleksandar Donev, Chiao-Yu Yang, Changho Kim
We develop a Split Reactive Brownian Dynamics (SRBD) algorithm for particle simulations of reaction-diffusion systems based on the Doi or volume reactivity model, in which pairs of particles react with a specified Poisson rate if they are closer than a chosen reactive distance. In our Doi model, we ensure that the microscopic reaction rules for various association and dissociation reactions are consistent with detailed balance (time reversibility) at thermodynamic equilibrium. The SRBD algorithm uses Strang splitting in time to separate reaction and diffusion and solves both the diffusion-only and reaction-only subproblems exactly, even at high packing densities...
January 21, 2018: Journal of Chemical Physics
https://www.readbyqxmd.com/read/29352784/calculation-of-a-solid-liquid-surface-tension-a-methodological-study
#13
T Dreher, C Lemarchand, L Soulard, E Bourasseau, P Malfreyt, N Pineau
The surface tension of a model solid/liquid interface constituted of a graphene sheet surrounded by liquid methane has been computed using molecular dynamics in the Kirkwood-Buff formalism. We show that contrary to the fluid/fluid case, the solid/liquid case can lead to different structurations of the first fluid layer, leading to significantly different values of surface tension. Therefore we present a statistical approach that consists in running a series of molecular simulations of similar systems with different initial conditions, leading to a distribution of surface tensions from which an average value and uncertainty can be extracted...
January 21, 2018: Journal of Chemical Physics
https://www.readbyqxmd.com/read/29352778/continuum-percolation-of-polydisperse-rods-in-quadrupole-fields-theory-and-simulations
#14
Shari P Finner, Mihail I Kotsev, Mark A Miller, Paul van der Schoot
We investigate percolation in mixtures of nanorods in the presence of external fields that align or disalign the particles with the field axis. Such conditions are found in the formulation and processing of nanocomposites, where the field may be electric, magnetic, or due to elongational flow. Our focus is on the effect of length polydispersity, which-in the absence of a field-is known to produce a percolation threshold that scales with the inverse weight average of the particle length. Using a model of non-interacting spherocylinders in conjunction with connectedness percolation theory, we show that a quadrupolar field always increases the percolation threshold and that the universal scaling with the inverse weight average no longer holds if the field couples to the particle length...
January 21, 2018: Journal of Chemical Physics
https://www.readbyqxmd.com/read/29352746/the-common-bean-cok-4-and-the-arabidopsis-fer-kinase-domain-share-similar-function-in-plant-growth-and-defense
#15
Rafhael Felipin Azevedo, Maria Celeste Gonçalves Vidigal, Paula Rodrigues Oblessuc, Maeli Melotto
Receptor-like kinases are membrane proteins that can be shared by diverse signaling pathways. Among them, the Arabidopsis thaliana FERONIA (FER) plays a role in the balance between distinct signals to control growth and defense. We have found that COK-4, a putative kinase encoded in the common bean anthracnose resistance locus Co-4 that is transcriptionally regulated during immune response, is highly similar to the kinase domain of FER. To assess whether COK-4 is a functional ortholog of FER, we expressed COK-4 in the wild type Col-0 and the fer-5 mutant of Arabidopsis and evaluated FER-associated traits...
January 20, 2018: Molecular Plant Pathology
https://www.readbyqxmd.com/read/29352708/a-systematic-review-and-discussion-of-symptom-specific-cognitive-behavioural-approaches-to-delusions-and-hallucinations
#16
Tania M Lincoln, Emmanuelle Peters
Studies on cognitive behavioural therapy for psychosis (CBTp) have developed from evaluating generic approaches to focusing on specific symptoms. The evidence for targeted studies on delusions and hallucinations was reviewed. We included randomized controlled trials (RCTs) examining the effect of individualized CBT-based interventions focusing either on delusions or on hallucinations. Twelve suitable RCTs were identified. Four RCTs focused on delusions, of which three took a focused approach targeting mechanisms assumed causal to persecutory delusions...
January 16, 2018: Schizophrenia Research
https://www.readbyqxmd.com/read/29352704/treatment-of-adult-chronic-indeterminate-chagas-disease-with-benznidazole-and-three-e1224-dosing-regimens-a-proof-of-concept-randomised-placebo-controlled-trial
#17
Faustino Torrico, Joaquim Gascon, Lourdes Ortiz, Cristina Alonso-Vega, María-Jesús Pinazo, Alejandro Schijman, Igor C Almeida, Fabiana Alves, Nathalie Strub-Wourgaft, Isabela Ribeiro
BACKGROUND: Chagas disease is a major neglected vector-borne disease. In this study, we investigated the safety and efficacy of three oral E1224 (a water-soluble ravuconazole prodrug) regimens and benznidazole versus placebo in adult chronic indeterminate Chagas disease. METHOD: In this proof-of-concept, double-blind, randomised phase 2 clinical trial, we recruited adults (18-50 years) with confirmed diagnosis of Trypanosoma cruzi infection from two outpatient units in Bolivia...
January 15, 2018: Lancet Infectious Diseases
https://www.readbyqxmd.com/read/29352682/are-allogeneic-transfusions-decreasing-in-total-knee-arthroplasty-patients-national-inpatient-sample-2009-2013
#18
Jaydev B Mistry, Chukwuweike U Gwam, Qais Naziri, Robert Pivec, Roby Abraham, Michael A Mont, Ronald E Delanois
BACKGROUND: Allogeneic transfusions are commonly used for substantial blood loss in total knee arthroplasty (TKA), but have been associated with adverse effects and increased costs. The purpose of this study is to provide a detailed description of (1) trends of allogeneic blood transfusion; (2) risk factors and adverse events; and (3) discharge disposition, length-of-stay (LOS), and cost/charge analysis for primary TKA patients who received an allogeneic blood transfusion from 2009-2013...
December 21, 2017: Journal of Arthroplasty
https://www.readbyqxmd.com/read/29352662/distinct-progression-patterns-of-brain-disease-in-infantile-and-juvenile-gangliosidoses-volumetric-quantitative-mri-study
#19
Igor Nestrasil, Alia Ahmed, Josephine M Utz, Kyle Rudser, Chester B Whitley, Jeanine R Jarnes-Utz
BACKGROUND: GM1-gangliosidosis and GM2-gangliosidosis (Tay-Sachs disease and Sandhoff disease) are unrelenting heritable neurodegenerative conditions of lysosomal ganglioside accumulation. Although progressive brain atrophy is characteristic, longitudinal quantification of specific brain structures has not been systematically studied. OBJECTIVES: The goal of this longitudinal study has been to quantify and track brain MRI volume changes, including specific structure volume changes, at different times in disease progression of childhood gangliosidoses, and to explore quantitative brain MRI volumetry (qMRI) as a non-invasive marker of disease progression for future treatment trials...
December 20, 2017: Molecular Genetics and Metabolism
https://www.readbyqxmd.com/read/29352530/psychotherapies-for-depression-in-low-and-middle-income-countries-a-meta-analysis
#20
Pim Cuijpers, Eirini Karyotaki, Mirjam Reijnders, Marianna Purgato, Corrado Barbui
Most psychotherapies for depression have been developed in high-income Western countries of North America, Europe and Australia. A growing number of randomized trials have examined the effects of these treatments in non-Western countries. We conducted a meta-analysis of these studies to examine whether these psychotherapies are effective and to compare their effects between studies from Western and non-Western countries. We conducted systematic searches in bibliographical databases and included 253 randomized controlled trials, of which 32 were conducted in non-Western countries...
February 2018: World Psychiatry: Official Journal of the World Psychiatric Association (WPA)
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