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anchoring effect

Yingying Mi, Wen Liu, Ke R Yang, Jianbing Jiang, Qi Fan, Zhe Weng, Yiren Zhong, Zishan Wu, Gary W Brudvig, Victor S Batista, Henghui Zhou, Hailiang Wang
Confining lithium polysulfide intermediates is one of the most effective ways to alleviate the capacity fade of sulfur-cathode materials in lithium-sulfur (Li-S) batteries. To develop long-cycle Li-S batteries, there is an urgent need for material structures with effective polysulfide binding capability and well-defined surface sites; thereby improving cycling stability and allowing study of molecular-level interactions. This challenge was addressed by introducing an organometallic molecular compound, ferrocene, as a new polysulfide-confining agent...
October 25, 2016: Angewandte Chemie
Ruru Fan, Yanyan Yuan, Qiang Zhang, Xi-Rui Zhou, Lili Jia, Zhuqing Liu, Changyuan Yu, Shi-Zhong Luo, Long Chen
Many lytic peptides contain a heptad sequence with leucine or isoleucine residues at "a" and "d" positions. However, their roles in the peptide-induced cytolytic process remain unclear. We have recently reported an anticancer lytic peptide ZXR-2 (FKIGGFIKKLWRSLLA), which contains a shortened zipper-like sequence with Ile/Leu at "a" and "d" positions. To understand the roles of these Ile/Leu residues, a series of analogs were constructed by sequentially replacing the Ile or Leu residue with alanine (Ala). Significant reduction of the cytolytic activity was observed when the Ile (3rd and 7th) and Leu (10th and 14th) residues at the "a" and "d" positions were substituted, while the replacement of the separate Leu (15th) residue had less effect...
October 24, 2016: Amino Acids
Francisco Rosa, Ana Silva, Cláudia Reis, Miguel Coutinho, Jorge Oliveira, Cecília Almeida E Sousa
OBJECTIVES: The aim of this study is to describe the experience of a tertiary referral centre in Portugal, of the placement of BAHA in children. METHODS: The authors performed a retrospective analysis of all children for whom hearing rehabilitation with BAHA was indicated at a central hospital, between January 2003 and December 2014. RESULTS: 53 children were included. The most common indications for placement of BAHA were external and middle ear malformations (n=34, 64%) and chronic otitis media with difficult to control otorrhea (n=9, 17%)...
October 21, 2016: Acta Otorrinolaringológica Española
Lena Diekmann, Marc Behrendt, Mahdi Amiri, Hassan Y Naim
BACKGROUND: Lactase phlorizin-hydrolase (LPH) is a membrane anchored type I glycoprotein of the intestinal epithelium that is composed of four homologous structural domains. The role of each distinct domain in the intramolecular organization and function of LPH is not completely understood. METHODS: Here, we analyzed the early events of LPH biosynthesis and trafficking by directed restructuring of the domain compositions. RESULTS: Removal of domain I (LPH∆1) results in a malfolded ER-localized protein...
October 21, 2016: Biochimica et Biophysica Acta
Christos Karagiannopoulos, Michael Sitler, Susan Michlovitz, Carole Tucker, Ryan Tierney
STUDY DESIGN: Prospective cohort study. INTRODUCTION: The active wrist joint position sense (JPS) test has been determined to be a clinically useful test for assessing wrist sensorimotor (SM) status after distal radius fracture (DRF). Its responsiveness is yet to be determined. PURPOSE OF THE STUDY: Primary study aim was to determine the active wrist JPS test responsiveness to detect change in wrist SM status at 8 and 12 weeks after DRF treatment intervention...
October 18, 2016: Journal of Hand Therapy: Official Journal of the American Society of Hand Therapists
Jian-Feng Guo, Dan-Qun Huo, Mei Yang, Chang-Jun Hou, Jun-Jie Li, Huan-Bao Fa, Hui-Bo Luo, Ping Yang
Herein, we have developed a simple, sensitive and paper-based colorimetric sensor for the selective detection of Chromium (Ⅵ) ions (Cr (VI)). Silanization-titanium dioxide modified filter paper (STCP) was used to trap bovine serum albumin capped gold nanoparticles (BSA-Au NPs), leading to the fabrication of BSA-Au NPs decorated membrane (BSA-Au NPs/STCP). The BSA-Au NPs/STCP operated on the principle that BSA-Au NPs anchored on the STCP were gradually etched by Cr (VI) as the leaching process of gold in the presence of hydrobromic acid (HBr) and hence induced a visible color change...
December 1, 2016: Talanta
Christian Voigt, Andreas Schaller, Carsten Klöhn, Roger Scholz
PURPOSE: In revision total hip arthroplasty, until today, orthopaedic surgeons are missing evidence-based guidelines on cementless acetabular cup fixation. METHODS: 5 finite element models were generated featuring the following anchorage strategies: 1 short peg, 1 long peg, 2 long screws, 3 short screws and zero anchoring components for reference. The micromotions at the implant-bone interface were analyzed for 3 different loadcases, "Seated leg-crossing" (joint force 940 N, impingement force 750 N), "Normal gait" (joint force 1820 N), and "Stumbling" (joint force 4520 N)...
October 15, 2016: Hip International: the Journal of Clinical and Experimental Research on Hip Pathology and Therapy
Michael G Sommer, Yvonne Rechkemmer, Lisa Suntrup, Stephan Hohloch, Margarethe van der Meer, Joris van Slageren, Biprajit Sarkar
The azido ligand is widely used in coordination chemistry both as a ligand and as a metal-bound reactant. Its role as a bridge for magnetic exchange coupling has attracted a lot of attention in polynuclear metal complexes. However, only a very limited number of complexes are known in which a single azide anion, particularly in the μ1,1-mode, is the only unsupported connection between two metal centers. We present here a series of copper(ii)-azido complexes with amine anchored, triazole-based tripodal ligands containing varying substituents...
October 21, 2016: Dalton Transactions: An International Journal of Inorganic Chemistry
Uwe Schneider, Fabiano Vasi, Jürgen Besserer
BACKGROUND AND PURPOSE: When fractionation schemes for hypofractionation and stereotactic body radiotherapy are considered, a reliable cell survival model at high dose is needed for calculating doses of similar biological effectiveness. An alternative to the LQ-model is the track-event theory which is based on the probabilities for one- and two two-track events. A one-track-event (OTE) is always represented by at least two simultaneous double strand breaks. A two-track-event (TTE) results in one double strand break...
2016: PloS One
Xiaohu Zheng, Lei Gao, Quanzhou Yao, Qunyang Li, Miao Zhang, Xiaoming Xie, Shan Qiao, Gang Wang, Tianbao Ma, Zengfeng Di, Jianbin Luo, Xi Wang
Two-dimensional (2D) materials possess outstanding lubrication property with their thicknesses down to a few atomic layers, but they are easily susceptible to sliding induced degradation or ubiquitous chemical modification. Maintaining the superior lubricating performance of 2D materials in a harsh working environment is highly desirable yet grandly challenging. Here we show that by proper alignment of graphene on a Ge(111) substrate, friction of graphene could be well preserved at an ultra-low level even after fluorination or oxidation...
October 19, 2016: Nature Communications
Chao Tan, Jun Wang, Yifang Hu, Peng Wang, Lili Zou
Staphylococcus aureus and Staphylococcus epidermidis are two of the most significant opportunistic human pathogens, causing medical implant and nosocomial infections worldwide. These bacteria contain surface proteins that play crucial roles in multiple biological processes. It has become apparent that they have evolved a number of unique mechanisms by which they can immobilise proteins on their surface. Notably, a conserved cell membrane-anchored enzyme, sortase A (SrtA), can catalyse the covalent attachment of precursor bacterial cell wall-attached proteins to peptidoglycan...
October 18, 2016: Antonie Van Leeuwenhoek
Baoying Li, Yihe Zhang, Ruifeng Du, Lin Gan, Xuelian Yu
In this paper, novel types of Bi2S3-Au heterostructures are fabricated through rationally controlling the growth atmosphere. Under argon condition, Au nanoparticles are preferentially deposited onto the tips of Bi2S3 nanorods to form Bi2S3-Au dumbbelled heterostructures. In contrast, due to the etching effect by amine, Au nanoparticles are randomly anchored onto the surface of nanorods to form Bi2S3-Au nanocorns in the presence of oxygen. Furthermore, the size of gold nanoparticles can be controlled through adjusting the concentration of reaction precursors...
October 18, 2016: Langmuir: the ACS Journal of Surfaces and Colloids
Junxue An, Xiaoyan Liu, Andra Dedinaite, Evgeniya Korchagina, Francoise M Winnik, Per M Claesson
Equilibration in adsorbing polymer systems can be very slow, leading to different physical properties at a given condition depending on the pathway that was used to reach this state. Here we explore this phenomenon using a diblock copolymer consisting of a cationic anchor block and a thermoresponsive block of poly(2-isopropyl-2-oxazoline), PIPOZ. We find that at a given temperature different polymer chain densities at the silica surface are achieved depending on the previous temperature history. We explore how this affects surface and friction forces between such layers using the atomic force microscope colloidal probe technique...
October 12, 2016: Journal of Colloid and Interface Science
Shengfu Zhong, Lixia Ma, Syeda Akash Fatima, Jiezhi Yang, Wanquan Chen, Taiguo Liu, Yuting Hu, Qing Li, Jingwei Guo, Min Zhang, Li Lei, Xin Li, Shengwen Tang, Peigao Luo
The wheat powdery mildew resistance gene Pm40, which is located on chromosomal arm 7BS, is effective against nearly all prevalent races of Blumeria graminis f. sp tritici (Bgt) in China and is carried by the common wheat germplasm PI 672538. A set of the F1, F2 and F2:3 populations from the cross of the resistant PI 672538 with the susceptible line L1034 were used to conduct genetic analysis of powdery mildew resistance and construct a high-density linkage map of the Pm40 gene. We constructed a high-density linkage genetic map with a total length of 6...
2016: PloS One
Caojian Zuo
OBJECTIVE: Cardiac fibroblasts play a vital role in the progression of fibrotic cardiac remodeling in hypertensive and failing heart. Osteoglycin (OGN) is implicated as a key regulator of left ventricular mass. However, its precise molecular role in cardiac fibrosis remains unknown. This study aims to investigate the impact of OGN in hypertensive cardiac remodeling. DESIGN AND METHOD: OGN deficient mice and its wildtype (WT) littermates were subjected to either angiotensin II (Ang II) infusion or pressure overload induced by transverse aortic constriction (TAC)...
September 2016: Journal of Hypertension
Maddison Turner, Larissa Reid, Mercedes Munkonda, Dylan Burger
OBJECTIVE: Diabetes and hypertension are cognate diseases that often coexist, potentiating one's risk for cardiovascular complications. Both diseases are typified by the development of endothelial dysfunction and are accompanied by increased circulating endothelial microparticles (eMPs). Microparticles are small membrane-derived vesicles that are secreted ubiquitously following cell stress. We have previously shown that eMPs are sensitive markers of vascular injury in hypertension and identified eMP-mediated signaling pathways that lead to endothelial injury...
September 2016: Journal of Hypertension
Alberto Avolio
Blood vessels function as conduits for distribution of blood throughout the circulatory system. Large arteries, in addition to the essential conduit function, also serve to dampen the effect of pulsatile ventricular ejection that generates pulsatile pressure with each cardiac cycle; that is, they exhibit a 'cushion' function. The conduit function can be compromised by intimal effects that cause obstruction to flow, generally attributed to plaque formation due to intimal changes affected by atherosclerotic processes...
September 2016: Journal of Hypertension
Myriam Barrejón, María J Gómez-Escalonilla, José Luis G Fierro, Pilar Prieto, José R Carrillo, Antonio M Rodríguez, Gonzalo Abellán, Ma Cruz López-Escalante, Mercedes Gabás, Juan T López-Navarrete, Fernando Langa
After the feasibility of the 1,3-dipolar cycloaddition reaction between nitrile imines and exfoliated graphene by density functional theory calculations was proved, very few-layer graphene was effectively functionalized using this procedure. Hydrazones with different electronic properties were used as precursors for the 1,3-dipoles, and microwave irradiation as an energy source enabled the reaction to be performed in a few minutes. The anchoring of organic addends on the graphene surface was confirmed by Raman spectroscopy, X-ray photoelectron spectroscopy (XPS) and thermogravimetric analysis...
October 18, 2016: Physical Chemistry Chemical Physics: PCCP
Marian Wiegersma, Chantal M C R Panman, Marjolein Y Berger, Henrica C W De Vet, Boudewijn J Kollen, Janny H Dekker
BACKGROUND: The Pelvic Floor Distress Inventory-20 is used to evaluate symptoms and treatment effects in women with pelvic floor disorders. To interpret changes in the scores of this inventory, information is needed on what patients and clinicians perceive as the minimal important (meaningful) change. Although this change in the inventory score has previously been investigated in women undergoing pelvic floor surgery, the results could not be generalized to women with milder symptoms (i...
October 14, 2016: American Journal of Obstetrics and Gynecology
L Westover, G Faulkner, W Hodgetts, D Raboud
This study presents the Advanced System for Implant Stability Testing (ASIST) which provides a non-invasive, quantitative measure of the stability of percutaneous implants used for craniofacial rehabilitation such as bone anchored hearing aids or dental implants. The ASIST uses an impact technique coupled with an analytical model which allows the measure to be independent of the system components. This paper presents a laboratory evaluation of the ASIST for the Oticon Medical Ponto and the Cochlear Baha Connect bone anchored hearing aid (BAHA) systems...
October 6, 2016: Journal of Biomechanics
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