bluuebunny/crossref_metadata_2025_split huggingface dataset:
Macroporous open cell polyester amphigel using citric acid and PEO: Solvent absorption, thermal behavior, and slow release of pesticide
Authors: Sarkar Dhruba Jyoti , Shakil Najam A. , Kumar Jitendra , Rana Virendra Singh , Kar Abhijit , Behera Bijay Kumar , Das Basanta Kumar 
Published: August 2020

AbstractThis article describes citric acid cross‐linked amphiphilic poly(ethylene oxide) (PEO) macroporous open cell polyester amphigel, optimally synthesized using response surface methodology by applying central composite design to screen significant reaction parameters for maximizing percent water sorption. The chemical structure of the amphigel was confirmed by proton nuclear magnetic resonance (1H NMR), FT‐IR and the thermal behavior was studied using thermo‐gravimetric and DSC. Due to amphiphilic nature, the amphigels also showed high chloroform (1151.33%–1193.33%) and water (755.33%–865%) absorption capacity. Thermal analysis revealed that amphigels are less thermal stability as compared to PEO, however, the degradation process was found to be multi step. The amphigel was effectively used as a carrier for easy loading of a hydrophobic pesticide and showed a slow release of the same.
An investigation of the synergistic effect between magnetite nanoparticles and polypyrrole in nanostructured layer‐by‐layer films
Authors: de Lima Lucas F. , Maciel Cristiane C. , Ferreira André L. , Rubira Rafael J. G. , Constantino Carlos J. L. , Ferreira Marystela 
Published: August 2020

AbstractIn this paper, we report the controlled fabrication of layer‐by‐layer (LbL) films deposited on gold substrates with three different supramolecular architectures using polypyrrole (Ppy) and magnetite nanoparticles (Fe3O4‐np), besides conventional poly(allylamine hydrochloride) (PAH) e poly(vinyl sulfonic acid) (PVS) polyelectrolytes, demonstrating the synergistic effect between Ppy and Fe3O4‐np such as a result of their interaction. Modified gold electrodes were analyzed by contact angle (wettability), surface plasmon resonance (SPR), raman spectroscopy, cyclic voltammetry, and electrochemical impedance spectroscopy. The (Fe3O4‐np/Ppy)3 architecture was also evaluated by scanning electron microscopy. The modified gold electrodes present more homogeneous covering, higher electron transfer and a decrease of resistance with the incorporation of the nanostructured materials such as Ppy and Fe3O4‐np forming (Fe3O4‐np/Ppy)3 LbL film. The results carried out in this study suggest that the (Fe3O4‐np/Ppy)3 LbL film can be applied as a possible electrochemical or optical non‐enzymatic sensor for analytical detection.
Visible‐Light‐Activated C−C Bond Cleavage and Aerobic Oxidation of Benzyl Alcohols Employing BiMXO5 (M=Mg, Cd, Ni, Co, Pb, Ca and X=V, P)
Authors: Bhim Anupam , Sasmal Shreya , Gopalakrishnan Jagannatha , Natarajan Srinivasan 
Published: August 2020

AbstractThe synthesis, structure, optical and photocatalytic studies of a family of compounds with the general formula, BiMXO5; M=Mg, Cd, Ni, Co, Pb, Ca and X=V, P is presented. The compounds were prepared by regular solid‐state reaction of constituents in the temperature range of 720–810 °C for 24 h. The compounds were characterized by powder X‐ray diffraction (PXRD) methods. The Rietveld refinement of the PXRD patterns have been carried out to establish the structure. The optical absorption spectra along with the colors in daylight have been explained employing the allowed d‐d transition. In addition, the observed colors of some of the V5+ containing compounds were explained using metal‐to‐metal charge transfer (MMCT) from the partially filled transition‐metal 3d orbitals to the empty 3d orbitals of V5+ ions. The near IR (NIR) reflectivity studies indicate that many compounds exhibit good NIR reflectivity, suggesting that these compounds can be employed as ‘cool pigments’. The experimentally determined band gaps of the prepared compounds were found to be suitable to exploit them for visible light activated photocatalysis. Photocatalytic C−C bond cleavage of alkenes and aerobic oxidation of alcohols were investigated employing visible light, which gave good yields and selectivity. The present study clearly demonstrated the versatility of the Paganoite family of compounds (BiMXO5) towards new colored inorganic materials, visible‐light photocatalysts and ‘cool pigments’.
Molybdenum‐tungsten Oxide Nanowires Rich in Oxygen Vacancies as An Advanced Electrocatalyst for Hydrogen Evolution
Authors: Tang Xinxin , Liu Jianglin , Zhan Ke , Sun Hao , Zhao Bin , Yan Ya 
Published: August 2020

AbstractElectrolysis of water is a promising way to produce hydrogen fuel in large scale. The commercialization of this technology requires highly efficient non‐noble metal electrocatalysts to decease the energy input for the hydrogen evolution reaction (HER). In this work, a novel nanowire structured molybdenum‐tungsten bimetallic oxide (CTAB‐D‐W4MoO3) is synthesized by a simple hydrothermal method followed with post annealing treatment. The obtained metal oxides feature with enhanced conductivity, rich oxygen vacancies and customized electronic structure. As such, the composite electrocatalyst exhibits excellent electrocatalytic performance for HER in an acidic environment, achieving a large current density of 100 mA cm−2 at overpotential of only 286 mV and a small Tafel slope of 71.2 mV dec−1. The excellent electrocatalytic HER performance of CTAB‐D‐W4MoO3 is attributed to the unique nanowire structure, rich catalytic active sites and promoted electron transfer rate.
Subinguinal orchiectomy—A minimally invasive approach to open surgery
Authors: Anderson Elliot , Pascoe Claire , Sathianathen Niranjan , Katz Darren , Murphy Declan , Lawrentschuk Nathan 
Published: August 2020

AbstractObjectivesTo determine the rate of morbidity and assess the oncological outcomes for the subinguinal orchidectomy technique.BackgroundRadical inguinal orchiectomy is the definitive management for a testicular mass suspicious for malignancy. The standard approach involves the division of the spermatic cord at the internal inguinal ring. In addition to the morbidity of a significant incision through skin and fascia, a known complication is damage to the nerves within the canal leading to local hypoesthesia or persistent inguinal and scrotal neuralgia. The subinguinal orchiectomy technique avoids opening the inguinal canal by excising the spermatic cord at the external inguinal ring.MethodsPatient data from three urologists who routinely perform subinguinal orchiectomies for suspected testicular malignancy was collected. A retrospective analysis between March 2011 and March 2019 was undertaken evaluating demographic, clinical, and histological data points. Descriptive analysis of oncological and surgical outcomes of subinguinal orchiectomy for testicular mass was performed. Descriptive analysis of oncological and surgical outcomes of subinguinal orchiectomy for testicular mass was performed.ResultsAbout 42 orchiectomies performed via the subinguinal approach were identified. The median age was 38 years (range 22‐72) and mean follow‐up time was 18.4 months (range 0.59‐61). Of the 38 patients with testicular cancer, histopathology showed 26 with pT1, 9 with pT2, and 3 with pT3 disease. Three patients had involvement of the cord, with one patient having a positive surgical margin secondary to venous invasion. No patients experienced neuropathic complications, hernia, or wound break down.ConclusionThese data suggest that subinguinal orchiectomy provides acceptable oncological outcomes, comparable to a traditional technique, and may decrease the risk of neuropathic injury and incisional/inguinal hernia. Further investigation with a larger, prospective series is required.
Verformungsverhalten von Betonen mit ausgeprägtem plastischen Stauchvermögen
Authors: Plückelmann Sven , Breitenbücher Rolf 
Published: August 2020

AbstractFür besondere Anwendungsfälle, wie beispielsweise Stauchschichten im Tunnelbau, liegen bereits erste Ansätze für Mörtel und Betone vor, die durch ein ausgeprägtes plastisches Stauchvermögen charakterisiert sind. Der vorliegende Beitrag beschreibt Versuche zum Stauchverhalten unter Querdehnungsbehinderung von stark porosierten Betonen mit geringer Druckfestigkeit (< 5 N/mm2). In die Versuche wurden Betone mit verschiedenen kompressiblen Additiven (Blähglas/EPS) und unterschiedlichen Wasserzementwerten einbezogen. Des Weiteren wurde das Verformungsverhalten sowohl unter Teilflächen‐ als auch Vollflächenbelastung untersucht, um unterschiedliche anwendungsbezogene Randbedingungen abzudecken. Auf Grundlage der ermittelten Spannungs‐Verformungskurven sowie Gefügeuntersuchungen von Proben vor und nach den Stauchversuchen konnten wesentliche Erkenntnisse zum Stauchverhalten der Betone gewonnen sowie material‐ und versuchstechnische Einflussfaktoren identifiziert werden.
Inflammation and behavioral symptoms in preoperational glioma patients: Is depression, anxiety, and cognitive impairment related to markers of systemic inflammation?
Authors: Song Li , Quan Xingyun , Su Lin , Wang Ke , Wang Haorun , Wu Lihong , Chen Chaoyi , Li Shenjie , Xiang Wei , Chen Ligang , Zhou Jie 
Published: August 2020

AbstractPurposeBehavioral symptoms, including depression, anxiety, and cognitive impairment, are common clinical symptoms of patients with glioma. However, the mechanisms underlying the behavioral symptoms of glioma patients remain unclear. In this study, we explore the correlation between markers of systemic inflammation and preoperational behavioral symptoms in glioma patients.Patients and MethodsPatients (n = 71) who had recently undertaken imaging (i.e., CT, MRI) for suspected glioma had a face‐to‐face interview, completed self‐report scales, and provided blood samples. Furthermore, we tested blood samples by a protein chip to select differential inflammatory cytokines and further confirm such differences using liquid‐phase chip technology.ResultsThe prevalence of depression, anxiety, and cognitive impairment in glioma patients prior to surgery in this study was 53.5%, 70.4%, and 32.4%, respectively. The increased levels of IFN‐γ were positively correlated with clinical symptoms of depression in the glioma patients. Moreover, increased IL‐2 levels were negatively associated with anxiety symptoms (p = .00) and positively correlated with cognitive impairment in glioma patients.ConclusionThis study suggests that systemic inflammation is associated with behavioral symptoms in glioma patients. This provides further evidence of the contribution of inflammatory markers to psychological symptoms in the context of physical conditions and lays the foundation for the development of further treatments of the behavioral symptoms in glioma patients.
Using Mutability Landscapes To Guide Enzyme Thermostabilization
Authors: Guo Chao , Ni Yan , Biewenga Lieuwe , Pijning Tjaard , Thunnissen Andy‐Mark W. H. , Poelarends Gerrit J. 
Published: August 2020

AbstractThermostabilizing enzymes while retaining their activity and enantioselectivity for applied biocatalysis is an important topic in protein engineering. Rational and computational design strategies as well as directed evolution have been used successfully to thermostabilize enzymes. Herein, we describe an alternative mutability‐landscape approach that identified three single mutations (R11Y, R11I and A33D) within the enzyme 4‐oxalocrotonate tautomerase (4‐OT), which has potential as a biocatalyst for pharmaceutical synthesis, that gave rise to significant increases in apparent melting temperature Tm (up to 20 °C) and in half‐life at 80 °C (up to 111‐fold). Introduction of these beneficial mutations in an enantioselective but thermolabile 4‐OT variant (M45Y/F50A) afforded improved triple‐mutant enzyme variants showing an up to 39 °C increase in Tm value, with no reduction in catalytic activity or enantioselectivity. This study illustrates the power of mutability‐landscape‐guided protein engineering for thermostabilizing enzymes.
Photoswitchable Lipids
Authors: Morstein Johannes , Impastato Anna C. , Trauner Dirk 
Published: August 2020

AbstractPhotoswitchable lipids are emerging tools for the precise manipulation and study of lipid function. They can modulate many aspects of membrane biophysics, including permeability, fluidity, lipid mobility and domain formation. They are also very useful in lipid physiology and enable optical control of a wide array of lipid receptors, such as ion channels, G protein‐coupled receptors, nuclear hormone receptors, and enzymes that translocate to membranes. Enzymes involved in lipid metabolism often process them in a light‐dependent fashion. Photoswitchable lipids complement other functionalized lipids widely used in lipid chemical biology, including isotope‐labeled lipids (lipidomics), fluorescent lipids (imaging), bifunctional lipids (lipid–protein crosslinking), photocaged lipids (photopharmacology), and other labeled variants.
How Transfer Partnerships Support More Equitable Baccalaureate Attainment
Authors: Bragg Debra D. 
Published: August 2020

AbstractThis chapter makes the case for the urgency to address the racial transfer gap that pervades the vertical transfer function involving community colleges and universities. Lessons from research on high‐performing transfer partnerships lay a foundation for transfer policies and practices described in other chapters in this volume of New Directions for Community Colleges (NDCC).
A Continuum of Transfer Partnerships: Toward Intentional Collaborations to Improve Transfer Outcomes
Authors: Yeh Theresa Ling , Wetzstein Lia 
Published: August 2020

AbstractThis chapter builds upon past research on community colleges and four‐year baccalaureate degree‐granting institutions’ efforts to improve transfer. We present a framework that describes multiple types of collaborative relationships between institutions and share strategies for practitioners to develop partnerships.
Impact of thoracic aortic aneurysm on outcomes of transcatheter aortic valve replacement: A nationwide cohort analysis
Authors: Kassis Nicholas , Saad Anas M. , Ahuja Keerat Rai , Gad Mohamed M. , Abdelfattah Omar M. , Isogai Toshiaki , Shekhar Shashank , Krishnaswamy Amar , Svensson Lars , Unai Shinya , Kapadia Samir R. 
Published: August 2020

AbstractBackgroundThe use of transcatheter aortic valve replacement (TAVR) has expanded to patient populations of varying surgical risk in light of recent clinical trials, yet its role in patients with aortic stenosis and coexisting thoracic aortic aneurysm (TAA) is not well‐delineated. We aimed to evaluate whether risk factors and in‐hospital outcomes vary between TAVR patients with and without an unruptured TAA.MethodsThe Nationwide Readmissions Database was queried for patients hospitalized between January 2012 and December 2017 who underwent TAVR with and without an unruptured TAA. In‐hospital outcomes were compared between cohorts after adjusting for sex, comorbidities, and TAVR approach, and in a subgroup analysis that excluded those with bicuspid aortic valves.ResultsAmong 171,011 TAVR patients, 1,677 (1%) presented with TAA. Patients with TAA were younger (median age 80 vs. 82 years, p < .001) and more likely to have bicuspid aortic valves (9.3% vs. 0.9%, p < .001). Among patients with aneurysm, 2.6% died, 2.2% developed stroke, 1% developed aortic dissection, and 1.4% experienced cardiac tamponade while hospitalized. After adjusting for age, sex, bicuspid aortic valve, and all comorbidities, TAA was associated with significantly higher risk of post‐TAVR aortic dissection (OR = 2.117, 95% CI [1.304–3.435], p = .002) and cardiac tamponade (OR = 1.682, 95% CI [1.1–2.572], p = .02).ConclusionsWhile the overall incidence of post‐TAVR complications is low, patients with an unruptured TAA should be carefully considered by the Heart Team in weighing the additional risks of aortic dissection and cardiac tamponade after TAVR with those associated with surgery.
Superaerophobic Platinum Nanosheets Arrays on Conductive Microgrids: A Highly Efficient Electrocatalytic Electrode for Hydrogen Evolution Reaction
Authors: Jin Jiao , Xiao Tianliang , Luo Rifeng , Nie Xiaoyan , Wang Yao , Liu Zhaoyue 
Published: August 2020

AbstractThe characteristics of electrolyte wetting and gas release are of vital importance for the electrocatalytic activity of a hydrogen evolution electrode (HEE). Herein, we reported a strategy to synergistically optimize the electrolyte wetting and gas release of a HEE to enhance its electrocatalytic activity. In our work, Pt nanosheets arrays were electrochemically deposited on a conductive substrate of Au microgrid to form a HEE. The micropores of Au grids induced discontinuous solid/liquid two‐phase contact lines in microscale, which facilitated the wetting of proton‐contained electrolyte. Simultaneously, the superaerophobicity of HEE promoted the release of hydrogen gas products. The joint improvement on electrolyte wetting and gas release enhanced the current density of hydrogen evolution reaction at a high overpotential by ∼300 % when compared with Pt nanosheets arrays on a flat Au substrate.
Mechanistic Insights into the Rh(I)/Rh2(II)‐Catalyzed Divergent Ring‐Opening of Cyclopropenes: A Computational Study
Authors: Kou Luyao , Dai Ping , Bao Xiaoguang 
Published: August 2020

AbstractThe mechanisms of transition‐metal‐catalyzed cyclopropenes involved reactions are complicated since diversified active intermediates could be potentially formed. Herein, computational studies were performed to gain mechanistic insights into the Rh(I)‐ and Rh2(II)‐catalyzed regioselective ring‐opening of allylic cyclopropenecarboxylate (1) and further rearrangement to form Δβ,γ butenolides. For the Rh(I)‐catalyzed ring‐opening of cyclopropene moiety of 1, an unusual oxidative addition of C−C σ bond of the three‐membered ring onto Rh(I) to form the intermediate with a C−Rh σ bond and a π…Rh interaction is proposed. While, for the Rh2(II)‐catalyzed reaction, it is more feasible for the cyclopropene moiety of 1 to convert to the Rh2(II) vinyl carbene intermediate. Despite the formation of different key intermediates for the Rh(I) and Rh2(II)‐catalyzed ring‐opening reactions, the subsequent intramolecular nucleophilic cyclization to form furan derivatives is similar. In addition, the origins of different regioselectivities for the Rh(I) and Rh2(II)‐catalyzed reactions are revealed.
In Cellulo Generation of Fluorescent Probes for Live‐Cell Imaging of Cylooxygenase‐2
Authors: Kaur Jatinder , Bhardwaj Atul , Wuest Frank 
Published: August 2020

AbstractLive‐cell imaging with fluorescent probes is an essential tool in chemical biology to visualize the dynamics of biological processes in real‐time. Intracellular disease biomarker imaging remains a formidable challenge due to the intrinsic limitations of conventional fluorescent probes and the complex nature of cells. This work reports the in cellulo assembly of a fluorescent probe to image cyclooxygenase‐2 (COX‐2). We developed celecoxib‐azide derivative 14, possessing favorable biophysical properties and excellent COX‐2 selectivity profile. In cellulo strain‐promoted fluorogenic click chemistry of COX‐2‐engaged compound 14 with non/weakly‐fluorescent compounds 11 and 17 formed fluorescent probes 15 and 18 for the detection of COX‐2 in living cells. Competitive binding studies, biophysical, and comprehensive computational analyses were used to describe protein‐ligand interactions. The reported new chemical toolbox enables precise visualization and tracking of COX‐2 in live cells with superior sensitivity in the visible range.
A Bayesian mixture of experts approach to covariate misclassification
Authors: Xia Michelle , Richard Hahn P. , Gustafson Paul 
Published: August 2020

AbstractThis article considers misclassification of categorical covariates in the context of regression analysis; if unaccounted for, such errors usually result in mis‐estimation of model parameters. With the presence of additional covariates, we exploit the fact that explicitly modelling non‐differential misclassification with respect to the response leads to a mixture regression representation. Under the framework of mixture of experts, we enable the reclassification probabilities to vary with other covariates, a situation commonly caused by misclassification that is differential on certain covariates and/or by dependence between the misclassified and additional covariates. Using Bayesian inference, the mixture approach combines learning from data with external information on the magnitude of errors when it is available. In addition to proving the theoretical identifiability of the mixture of experts approach, we study the amount of efficiency loss resulting from covariate misclassification and the usefulness of external information in mitigating such loss. The method is applied to adjust for misclassification on self‐reported cocaine use in the Longitudinal Studies of HIV‐Associated Lung Infections and Complications.
Stability and Cell Permeability of Sulfonyl Fluorides in the Design of Lys‐Covalent Antagonists of Protein‐Protein Interactions
Authors: Gambini Luca , Udompholkul Parima , Salem Ahmed F. , Baggio Carlo , Pellecchia Maurizio 
Published: August 2020

AbstractRecently we reported on aryl‐fluorosulfates as possible stable and effective electrophiles for the design of lysine covalent, cell permeable antagonists of protein–protein interactions (PPIs). Here we revisit the use of aryl‐sulfonyl fluorides as Lys‐targeting moieties, incorporating these electrophiles in XIAP (X‐linked inhibitor of apoptosis protein) targeting agents. We evaluated stability in buffer and reactivity with Lys311 of XIAP of various aryl‐sulfonyl fluorides using biochemical and biophysical approaches, including displacement assays, mass spectrometry, SDS gel electrophoresis, and denaturation thermal shift measurements. To assess whether these modified electrophilic “warheads” can also react with Tyr, we repeated these evaluations with a Lys311Tyr XIAP mutant. Using a direct cellular assay, we could demonstrate that selected agents are cell permeable and interact covalently with their intended target in cell. These results suggest that certain substituted aryl‐sulfonyl fluorides can be useful Lys‐ or Tyr‐targeting electrophiles for the design of covalent pharmacological tools or even future therapeutics targeting protein–protein interactions.
Clinical and Model‐Based Evaluation of the Effect of Glasdegib on Cardiac Repolarization From a Randomized Thorough QT Study
Authors: Masters Joanna C. , Shaik Naveed , Mendes da Costa Laure , Hee Brian , LaBadie Robert R. 
Published: August 2020

AbstractGlasdegib is a potent, selective oral inhibitor of the Hedgehog signaling pathway. This phase 1 double‐blind thorough QT study (NCT03162900) evaluated the effects of glasdegib on QTc interval. The study enrolled 36 healthy volunteers to receive a single dose of 150 mg glasdegib (representing a therapeutic dose), 300 mg glasdegib (representing a supratherapeutic dose), 400 mg moxifloxacin (positive control), or placebo under fasted conditions. The study demonstrated that therapeutic and supratherapeutic doses of glasdegib had no significant effect on QTc interval; the upper bound of the 2‐sided 90% confidence intervals (CIs) for all time‐matched least‐squares mean differences in QT interval corrected using Fridericia's formula (QTcF) between glasdegib and placebo was below the prespecified criterion of 20 milliseconds (Food and Drug Administration correspondence reviewed and accepted). Based on an exposure–response analysis, glasdegib was determined not to have a meaningful effect on heart rate (change in RR interval). The mean (90%CI) model‐derived baseline and placebo‐adjusted QTcF at the average maximum observed concentration values corresponding to therapeutic and supratherapeutic glasdegib doses was 7.3 milliseconds (6.5‐8.2 milliseconds) and 13.7 milliseconds (12.0‐15.5 milliseconds), respectively. Together these results demonstrated that following therapeutic and supratherapeutic glasdegib dosing, the change in QTc from baseline was well below the 20‐millisecond threshold of clinical concern in oncology.