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https://www.readbyqxmd.com/read/29788721/vanishing-thermal-conductance-of-carbon-nanotube-upon-encapsulation-by-zig-zag-sulfur-chain
#1
Sayantanu Koley, Sabyasachi Sen, Swapan Chakrabarti
Herein we report an unprecedented enhancement of thermoelectric properties of a single walled carbon nanotube upon encapsulation of a zig-zag sulfur chain inside the nanocore. Our calculations on a 70 Å long [5; 5] carbon nanotube reveals that the encapsulation of zig-zag sulfur chain will lead to 107% increase in the thermoelectric gure of merit and concomitant quenching of thermal conductance by 90%. We have noticed that finite transmission gradient at the Fermi level combined with destructive quantum interference at the sulfur sites and structural conformation dependent scattering induced damping of phonon transmission are attributed to the dramatic improvement of thermoelectric behavior of this material...
May 23, 2018: Journal of Physical Chemistry Letters
https://www.readbyqxmd.com/read/29780509/self-complementary-nickel-halides-enable-multifaceted-comparisons-of-intermolecular-halogen-bonds-fluoride-ligands-vs-other-halides
#2
Vargini Thangavadivale, Pedro M Aguiar, Naseralla A Jasim, Sarah J Pike, Dan A Smith, Adrian C Whitwood, Lee Brammer, Robin N Perutz
The syntheses of three series of complexes designed with self-complementary motifs for formation of halogen bonds between an iodotetrafluorophenyl ligand and a halide ligand at square-planar nickel are reported, allowing structural comparisons of halogen bonding between all four halides C6 F4 I···X-Ni (X = F, Cl, Br, I). In the series trans -[NiX(2,3,5,6-C6 F4 I)(PEt3 )2 ] 1pX and trans -[NiX(2,3,4,5-C6 F4 I)(PEt3 )2 ] (X = F, Cl, Br, I) 1oX , the iodine substituent on the benzene ring was positioned para and ortho to the metal, respectively...
April 21, 2018: Chemical Science
https://www.readbyqxmd.com/read/29758496/cord-blood-concentrations-of-leptin-zinc-%C3%AE-2-glycoprotein-and-adiponectin-and-adiposity-gain-during-the-first-3-mo-of-life
#3
Verônica L V Euclydes, Natalia P Castro, Lourdes R Lima, Cyro Brito, Laisa Ribeiro, Fernanda Agapito Simões, Guaraci Requena, Liania Alves Luzia, Patricia Helen Rondó
OBJECTIVES: Adipose tissue development starts in intrauterine life and cytokines are involved in this process. Therefore, understanding the role of cytokines in the fat mass gain of infants is crucial to prevent obesity later in life. Furthermore, recent evidence indicates a sex-specific link between cytokines and adipose tissue development. The objective of this study was to assess sex-specific relationships of cord blood concentrations of the cytokines leptin, zinc-α2-glycoprotein (ZAG), and adiponectin with infant adiposity during the first 3 mo of life...
March 22, 2018: Nutrition
https://www.readbyqxmd.com/read/29755407/circulating-and-adipose-tissue-mrna-levels-of-zinc-%C3%AE-2-glycoprotein-leptin-high-molecular-weight-adiponectin-and-tumor-necrosis-factor-alpha-in-colorectal-cancer-patients-with-or-without-obesity
#4
Huijuan Zhu, Meijuan Liu, Nianrong Zhang, Hui Pan, Guole Lin, Naishi Li, Linjie Wang, Hongbo Yang, Kemin Yan, Fengying Gong
Objectives: To explore zinc-α2-glycoprotein (ZAG), leptin, high-molecular-weight adiponectin (HMW-ADPN), and tumor necrosis factor-alpha (TNF-α) levels in serum and subcutaneous and visceral white adipose tissue (sWAT and vWAT) among normal weight (NW) and overweight/obese (OW/OB) patients with colorectal cancer (CRC). Methods: A total of 76 Chinese CRC patients (42 NW + CRC, 34 OW/OB + CRC) and 40 healthy controls were recruited. Serum levels of the adipokines of interest were measured by an enzyme-linked immunosorbent assay method, and their mRNA levels in sWAT and vWAT were determined by reverse transcription quantitative PCR methods...
2018: Frontiers in Endocrinology
https://www.readbyqxmd.com/read/29752946/effect-of-free-amino-acids-on-bovine-retinal-pericytes
#5
S Vidhya, R Ramya, K Coral, K N Sulochana, S R Bharathidevi
AIM: This study was conducted to estimate the aminoacid levels in the vitreous of patients with proliferative diabetic retinopathy, and to correlate it with the adiponectin levels. Secondly to test if these amino acids can alter or induce adiponectin levels and its related factors in retinal cells like pericyte as an in vitro model. METHODS: All human studies were done as per declaration of Helsinki with institutional approval and after obtaining consent from participating individuals...
May 9, 2018: Experimental Eye Research
https://www.readbyqxmd.com/read/29749675/graphene-oxide-catalyzed-direct-ch-ch-type-cross-coupling-the-intrinsic-catalytic-activities-of-zig-zag-edges
#6
Hongru Wu, Chenliang Su, Rika Tandiana, Cuibo Liu, Chuntian Qiu, Yang Bao, Ji'en Wu, Yangsen Xu, Jiong Lu, Dianyuan Fan, Kian Ping Loh
The development of graphene oxide (GO)-based materials for C-C cross couplings represents a significant advance in carbocatalysis. Although GO has been widely used in various catalytic reactions, the scopes of reactions reported are quite narrow, and the relationships between the type of functional groups present and the specific activity of the GO are not well understood. Herein, we explore CH-CH type cross-couplings of xanthenes with arenes using GO as real carbocatalysts, and not as stoichiometric reactants...
May 10, 2018: Angewandte Chemie
https://www.readbyqxmd.com/read/29738165/-correlation-of-serum-zinc-alpha-2-glycoprotein-with-blood-lipid-and-reproductive-hormone-levels-in-men
#7
Chao-Ju Yang, Rui-Yu Han, Shu-Song Wang
Objective: To study the changes of the serum zinc alpha 2 glycoprotein (ZAG) level in men and its relationship with blood lipid male reproductive hormones. METHODS: We enrolled 297 men aged 25- 65 years in this study, 152 with hyperlipemia (HL) and the other 145 with normal blood lipid (normal control). We divided them into four age groups (25-35 yr, 36-45 yr, 46-55 yr, and 56-65 yr) and three tertile groups (Q1, Q2, and Q3) according to the tertiles of the serum ZAG level, and examined their blood lipid, blood glucose, serum ZAG, and reproductive hormones...
November 2017: Zhonghua Nan Ke Xue, National Journal of Andrology
https://www.readbyqxmd.com/read/29732664/o-doped-zig-zag-molecular-ribbons
#8
Davide Bonifazi, Andrey Berenzin, Tommaso Battisti, Nicolas Biot
The synthesis of the first O-doped molecular rhombic ribbon featuring two zig-zag peripheries, has been achieved. This includes oxidative C-C and C-O bond formations that allowed the stepwise elongation and planarization of a hexaoxa-congener of 2,7-periacenoacene. X-ray diffraction analysis corroborated the flat structure and the topology of the zig-zag O-doped edges. Photophysical and electrochemical investigations showed that the extension of the PXX into the molecular ribbon induces a noticeable shrinking of the molecular band gap devised by a dramatic rising of the HOMO energy level, a desirable property for p-type organic semiconductors...
May 6, 2018: Angewandte Chemie
https://www.readbyqxmd.com/read/29705686/addiction-vulnerability-trait-impacts-complex-movement-control-evidence-from-sign-trackers
#9
Aaron Kucinski, Cindy Lustig, Martin Sarter
Cognitive-motivational vulnerability traits are associated with increased risk for substance addiction and relapse. Sign-tracking (ST) behavior in rats is associated with poor attentional control, mediated by an unresponsive basal forebrain cholinergic system, and an increased risk for substance addiction/relapse. A separate literature links poor attentional control and cholinergic losses to increased fall risk in Parkinson's disease. Here we tested the hypothesis that the relatively inferior attentional control of STs extends to complex movement control and a propensity for falls...
April 26, 2018: Behavioural Brain Research
https://www.readbyqxmd.com/read/29697508/in-line-filtration-reduces-postoperative-venous-peripheral-phlebitis-associated-with-cannulation-a-randomized-clinical-trial
#10
Gianluca Villa, Cosimo Chelazzi, Rosa Giua, Lorenzo Tofani, Giovanni Zagli, Paolo Boninsegni, Fulvio Pinelli, A Raffaele De Gaudio, Stefano Romagnoli
BACKGROUND: Peripheral venous cannulation is an everyday practice of care for patients undergoing anesthesia and surgery. Particles infused with intravenous fluids (eg, plastic/glass/drugs particulate) contribute to the pathogenesis of peripheral phlebitis. The aim of this study is to demonstrate the efficacy of in-line filtration in reducing the incidence of postoperative phlebitis associated with peripheral short-term vascular access. METHODS: In this controlled trial, 268 surgical patients were randomly assigned to in-line filtration and standard care (NCT03193827)...
April 23, 2018: Anesthesia and Analgesia
https://www.readbyqxmd.com/read/29614273/powder-compression-properties-of-paracetamol-paracetamol-hydrochloride-paracetamol-cocrystals-and-coformers
#11
Ann-Sofie Persson, Hamzah Ahmed, Sitaram Velaga, Göran Alderborn
The objective was to study the relationship between crystal structure, particle deformation properties and tablet-forming ability for the monoclinic form of paracetamol (PRA), two cocrystals and a salt crystal of PRA in addition to two coformers (oxalic acid and 4,4'-bipyridine). Thus, the structure - property - performance relationship was investigated. Analytical powder compression was used for determination of effective plasticity, as inferred from the Heckel yield pressure and the Frenning parameter, and the elastic deformation was determined from in-die tablet elastic recovery...
March 31, 2018: Journal of Pharmaceutical Sciences
https://www.readbyqxmd.com/read/29608898/canagliflozin-protects-against-non-alcoholic-steatohepatitis-in-type-2-diabetic-rats-through-zinc-alpha-2-glycoprotein-up-regulation
#12
Soad L Kabil, Nevertyty M Mahmoud
Elevated blood glucose and insulin resistance are triggering factors for non-alcoholic steatohepatitis (NASH). We investigated the effects of the Sodium Glucose co-Transporter 2 (SGLT2) inhibitor canagliflozin on NASH development in rats with type 2 diabetes mellitus as well as the possible underlying mechanisms and for the first time the effect of canagliflozin on the hepatic zinc-α2-glycoprotein (ZAG) levels. Rats were treated with nicotinamide and streptozotocin to reduce the insulin secretory capacity then fed high fat diet for 8 weeks...
June 5, 2018: European Journal of Pharmacology
https://www.readbyqxmd.com/read/29604855/oxygen-and-sulfur-adsorption-on-vicinal-surfaces-of-copper-and-silver-preferred-adsorption-sites
#13
Da-Jiang Liu, Patricia A Thiel
We present an extensive density functional theory (DFT) study of adsorption site energetics for oxygen and sulfur adsorbed on two vicinal surfaces of Cu and Ag, with the goal of identifying the most stable adsorption site(s), identifying trends and common themes, and comparing with experimental work in the literature where possible. We also present benchmark calculations for adsorption on the flat (111) and (100) surfaces. The first vicinal surface is the (211), and results are similar for both metals. We find that the step-doubling reconstruction is favored with both adsorbates and is driven by the creation of a special stable fourfold hollow (4fh) site at the reconstructed step...
March 28, 2018: Journal of Chemical Physics
https://www.readbyqxmd.com/read/29596378/range-sensor-based-efficient-obstacle-avoidance-through-selective-decision-making
#14
Youngbo Shim, Gon-Woo Kim
In this paper, we address a collision avoidance method for mobile robots. Many conventional obstacle avoidance methods have been focused solely on avoiding obstacles. However, this can cause instability when passing through a narrow passage, and can also generate zig-zag motions. We define two strategies for obstacle avoidance, known as Entry mode and Bypass mode. Entry mode is a pattern for passing through the gap between obstacles, while Bypass mode is a pattern for making a detour around obstacles safely...
March 29, 2018: Sensors
https://www.readbyqxmd.com/read/29570397/the-tumor-secretory-factor-zag-promotes-white-adipose-tissue-browning-and-energy-wasting
#15
Sawsan Elattar, Manali Dimri, Ande Satyanarayana
This article includes supplemental data. Please visit http://www.fasebj.org to obtain this information.Cachexia is a complex tissue-wasting syndrome characterized by inflammation, hypermetabolism, increased energy expenditure, and anorexia. Browning of white adipose tissue (WAT) is one of the significant factors that contribute to energy wasting in cachexia. By utilizing a cell implantation model, we demonstrate here that the lipid mobilizing factor zinc-α2 -glycoprotein (ZAG) induces WAT browning in mice...
March 23, 2018: FASEB Journal: Official Publication of the Federation of American Societies for Experimental Biology
https://www.readbyqxmd.com/read/29566716/overexpression-of-zinc-%C3%AE-2-glycoprotein-suppressed-seizures-and-seizure-related-neuroflammation-in-pentylenetetrazol-kindled-rats
#16
Ying Liu, Teng Wang, Xi Liu, Yuetao Wen, Tao Xu, Xinyuan Yu, Xin Wei, Xueying Ding, Lijuan Mo, Maojia Yin, Xinjie Tan, Lifen Chen
BACKGROUND: Zinc-α2-glycoprotein (ZAG) is a 42-kDa protein reported as an anti-inflammatory adipocytokine. Evidences from clinical and experimental studies revealed that brain inflammation plays important roles in epileptogenesis and seizure. Interestingly, closely relationship between ZAG and many important inflammatory mediators has been proven. Our previous study identified ZAG in neurons and found that ZAG is decreased in epilepsy and interacts with TGFβ and ERK. This study aimed to investigate the role of ZAG in seizure and explore its effect on seizure-related neuroinflammation...
March 22, 2018: Journal of Neuroinflammation
https://www.readbyqxmd.com/read/29566523/onsager-s-variational-principle-for-the-dynamics-of-a-vesicle-in-a-poiseuille-flow
#17
Yutaka Oya, Toshihiro Kawakatsu
We propose a systematic formulation of the migration behaviors of a vesicle in a Poiseuille flow based on Onsager's variational principle, which can be used to determine the most stable steady state. Our model is described by a combination of the phase field theory for the vesicle and the hydrodynamics for the flow field. The dynamics is governed by the bending elastic energy and the dissipation functional, the latter being composed of viscous dissipation of the flow field, dissipation of the bending energy of the vesicle, and the friction between the vesicle and the flow field...
March 21, 2018: Journal of Chemical Physics
https://www.readbyqxmd.com/read/29562836/the-valsalva-manoeuvre-versus-tourniquet-for-venipuncture
#18
Gianluca Villa, Cosimo Chelazzi, Rosa Giua, Laura Lavacchini, Lorenzo Tofani, Giovanni Zagli, Francesco Barbani, A Raffaele De Gaudio, Stefano Romagnoli, Fulvio Pinelli
BACKGROUND: During ultrasound-guided cannulation, venous filling is required for venipuncture. Tourniquet with an elastic tube at the axilla is the most common method to induce venous stasis for cannulation of the deep veins of the arm. Although effective, this method might be associated with short- and long-term complications. Valsalva manoeuvre has been used to produce venous filling in other extrathoracic veins. The aim of this observational study is to demonstrate the effect of Valsalva manoeuvre in respect of the elastic tourniquet on venous distention during echography-guided cannulation of the deep veins of the arm...
March 1, 2018: Journal of Vascular Access
https://www.readbyqxmd.com/read/29555697/the-influence-of-chemotaxis-and-swimming-patterns-on-the-virulence-of-the-coral-pathogen-vibrio-coralliilyticus
#19
Blake Ushijima, Claudia C Häse
Chemotaxis, the directed movement towards or away from a chemical signal, can be essential to bacterial pathogens for locating hosts or avoiding hostile environments. The coral pathogen Vibrio coralliilyticus chemotaxes towards coral mucus; however, chemotaxis has not been experimentally demonstrated to be important for virulence. To further examine this, in-frame mutations were constructed in genes predicted to be important for V. coralliilyticus chemotaxis. Most Vibrio genomes encode multiple homologs of various chemotaxis-related genes and two paralogs of each for cheB , cheR , and cheA were identified...
March 19, 2018: Journal of Bacteriology
https://www.readbyqxmd.com/read/29532262/intersection-as-key-locations-for-bearded-capuchin-monkeys-sapajus-libidinosus-traveling-within-a-route-network
#20
A Presotto, M P Verderane, L Biondi, O Mendonça-Furtado, N Spagnoletti, M Madden, P Izar
There is evidence that wild animals are able to recall key locations and associate them with navigational routes. Studies in primate navigation suggest most species navigate through the route network system, using intersections among routes as locations of decision-making. Recent approaches presume that points of directional change may be key locations where animals decide where to go next. Over four consecutive years, we observed how a wild group of bearded capuchin monkeys used a route network system and Change Point locations (CPs) in the Brazilian ecotone of Cerrado-Caatinga...
May 2018: Animal Cognition
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