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https://www.readbyqxmd.com/read/29453536/relevance-of-physicochemical-characterization-of-nanomaterials-for-understanding-nano-cellular-interactions
#1
Henriqueta Louro
The manufactured nanomaterials (NMs) have specific physicochemical properties that confer unique mechanical, optical, electrical and magnetic characteristics that are beneficial for biomedical and industrial applications. However, recent studies have suggested that such specific physicochemical properties of the NMs may define nano-bio interactions thereby determining their toxic potential.One of the major concerns about NMs is the potential to induce cancer, suggested by some experimental studies, as seen for titanium dioxide nanomaterials or carbon nanotubes...
2018: Advances in Experimental Medicine and Biology
https://www.readbyqxmd.com/read/29453502/parenting-wisely-six-months-later-how-implementation-delivery-impacts-program-effects-at-follow-up
#2
Katie Cotter Stalker, Roderick A Rose, Martica Bacallao, Paul R Smokowski
We evaluated the effectiveness of the Parenting Wisely (PW) program 6 months post intervention and assessed differences based on delivery format. Using a quasi-experimental design, parents (N = 311) participated in the PW program in one of five formats (i.e., parents-only intensive workshop, parents-only 5-week group, parents and adolescents 5-week group, parent and adolescent online, and parent-only online format). An additional 53 parents served as a comparison group. We used the McMaster Family Assessment Device, the Child Behavior Checklist, and the Violent Behavior Checklist to measure family functioning, parenting, and adolescent behavior...
February 16, 2018: Journal of Primary Prevention
https://www.readbyqxmd.com/read/29453267/plant-microbe-and-abiotic-factors-influencing-salmonella-survival-and-growth-on-alfalfa-sprouts-and-swiss-chard-microgreens
#3
Elizabeth Reed, Christina M Ferreira, Rebecca Bell, Eric W Brown, Jie Zheng
Microgreens, like sprouts, are relatively fast growing, and generally consumed raw. Moreover, as observed in sprouts, microbial contamination from preharvest sources could also be present in the production of microgreens. In this study, two Salmonella enterica serovars (Hartford and Cubana) applied, at multiple inoculation levels, were evaluated for survival and growth on alfalfa sprouts and Swiss chard microgreens using the most probable number (MPN) method. Various abiotic factors were also examined for their effects on Salmonella survival and growth on sprouts and microgreens...
February 16, 2018: Applied and Environmental Microbiology
https://www.readbyqxmd.com/read/29452908/gait-and-posture-analysis-in-patients-with-maxillary-transverse-discrepancy-before-and-after-rpe
#4
Martina Mason, Fabiola Spolaor, Annamaria Guiotto, Alberto De Stefani, Antonio Gracco, Zimi Sawacha
AIM: The purpose of this study was to evaluate the effects of the rapid palatal expansion (RPE) on posture and gait analysis in subjects with maxillary transverse discrepancies. MATERIAL AND METHODS: Forty-one patients between 6 and 12 years were divided into 3 groups: 10 control subjects (Cs), 16 patients with unilateral posterior crossbite (CbMono), 15 patients with maxillary transverse discrepancy and no crossbite (Nocb). Every subject underwent gait analysis and posturographic examination in order to evaluate the presence of balance alterations before (T0) and after (T4) RPE application...
February 13, 2018: International Orthodontics
https://www.readbyqxmd.com/read/29452385/longitudinal-tobacco-use-transitions-among-adolescents-and-young-adults-2014-2016
#5
Elizabeth C Hair, Alexa R Romberg, Raymond Niaura, David B Abrams, Morgane A Bennett, Haijun Xiao, Jessica M Rath, Lindsay Pitzer, Donna Vallone
Introduction: Among youth, the frequency and prevalence of using more than one tobacco (small cigar, cigarette, and hookah) or nicotine-containing product (e-cigarettes-ENDS) are changing. These shifts pose challenges for regulation, intervention, and prevention campaigns because of scant longitudinal data on the stability of use patterns in this changing product landscape. Methods: A nationally representative longitudinal survey of 15- to 21-year olds (n = 15,275) was used to describe transitions between never use, noncurrent use, and past 30-day use of combustible tobacco, e-cigarettes (ENDS), and dual use of both kinds of products...
February 13, 2018: Nicotine & Tobacco Research: Official Journal of the Society for Research on Nicotine and Tobacco
https://www.readbyqxmd.com/read/29452199/establishment-of-the-nasal-microbiota-in-the-first-18-months-of-life-correlation-with-early-onset-rhinitis-and-wheezing
#6
Le Duc Huy Ta, Gaik Chin Yap, Carina Jing Xuan Tay, Alicia Shi Min Lim, Chiung Hui Huang, Collins Wenhan Chu, Paola Florez De Sessions, Lynette P Shek, Anne Goh, Hugo P S Van Bever, Oon Hoe Teoh, Jian Yi Soh, Biju Thomas, Mahesh Babu Ramamurthy, Daniel Y T Goh, Christophe Lay, Shu-E Soh, Yiong Huak Chan, Seang-Mei Saw, Kenneth Kwek, Yap-Seng Chong, Keith M Godfrey, Martin Lloyd Hibberd, Bee Wah Lee
BACKGROUND: The dynamic establishment of the nasal microbiota in early life influences local mucosal immune responses and the susceptibility to childhood respiratory disorders. OBJECTIVE: The aim of this case-control study was to monitor, evaluate and compare the development of the nasal microbiota of infants who developed rhinitis and wheeze in the first 18 months of life with those of healthy controls. METHODS: Anterior nasal swabs of 122 subjects belonging to the GUSTO birth cohort were collected longitudinally over seven time points in the first 18 months of life...
February 13, 2018: Journal of Allergy and Clinical Immunology
https://www.readbyqxmd.com/read/29451901/the-novel-antibiotic-rhodomyrtone-traps-membrane-proteins-in-vesicles-with-increased-fluidity
#7
Dennapa Saeloh, Varomyalin Tipmanee, Kin Ki Jim, Marien P Dekker, Wilbert Bitter, Supayang P Voravuthikunchai, Michaela Wenzel, Leendert W Hamoen
The acylphloroglucinol rhodomyrtone is a promising new antibiotic isolated from the rose myrtle Rhodomyrtus tomentosa, a plant used in Asian traditional medicine. While many studies have demonstrated its antibacterial potential in a variety of clinical applications, very little is known about the mechanism of action of rhodomyrtone. Preceding studies have been focused on intracellular targets, but no specific intracellular protein could be confirmed as main target. Using live cell, high-resolution, and electron microscopy we demonstrate that rhodomyrtone causes large membrane invaginations with a dramatic increase in fluidity, which attract a broad range of membrane proteins...
February 16, 2018: PLoS Pathogens
https://www.readbyqxmd.com/read/29451778/rapid-forming-and-self-healing-agarose-based-hydrogels-for-tissue-adhesives-and-potential-wound-dressings
#8
Zhuo Zhang, Xiaolin Wang, Yitong Wang, Jingcheng Hao
To meet the progressive requirements of advanced engineering materials with superior physicochemical performances, self-healing and injectable hydrogels (AD hydrogels) based on agarose with pH-response were prepared through dynamic covalent Schiff-base linkages by simply mixing nontoxic agarose-ethylenediamine conjugate (AG-NH2) and dialdehyde-functionalized polyethylene glycol (DF-PEG) solutions. The self-healing and injectable capabilities of the hydrogels without any external stimulus are ascribed to dynamic covalent Schiff-base linkages between the aldehyde groups of DF-PEG and amine groups on AG-NH2 backbone...
February 16, 2018: Biomacromolecules
https://www.readbyqxmd.com/read/29451728/phosphinic-acid-based-linkers-new-building-block-in-mof-chemistry
#9
Jan Hynek, Petr Brázda, Jan Rohlíček, Michael G S Londesborough, Jan Demel
Metal-organic frameworks (MOFs) are a chemically and topologically diverse family of materials composed of inorganic nodes and organic linkers bound together by coordination bonds. In this contribution we present two significant innovations in this field. The first is the use of a new coordination group in phenylene-1,4-bis(methylphosphinic acid) (PBPA), a phosphinic acid analogue of commonly-used terephtalic acid. We show that the use of this new linker group leads to the formation of a hydrothermally stable permanently porous MOF structure...
February 16, 2018: Angewandte Chemie
https://www.readbyqxmd.com/read/29451389/molecular-dynamics-study-of-hydrophilic-sphalerite-110-surface-as-modified-by-normal-and-branched-butylthiols
#10
Monir Hosseini Anvari, Qingxia Liu, Zhenghe Xu, Phillip Choi
Molecular dynamics simulation was used to study the wettability of the hydrophilic sphalerite (110) surface chemically modified by butylthiols made up of normal and branched alkyl tails, referred to as n-butylthiol and i-butylthiol hereafter, at different adsorption site coverages. Butylthiol molecules were grafted onto the adsorption sites of the surface in two different distributions - ordered and random. The results showed that for a given butylthiol at a given site coverage, random surface distribution yielded a slightly larger contact angle...
February 16, 2018: Langmuir: the ACS Journal of Surfaces and Colloids
https://www.readbyqxmd.com/read/29451289/multi-molecular-emission-of-a-cationic-pt-ii-complex-through-hydrogen-bonding-interactions
#11
Kaho Yamaguchi, Kazuma Yamawaki, Takuya Kimura, Junpei Kuwabara, Takeshi Yasuda, Yoshinobu Nishimura, Takaki Kanbara
The cationic Pt complexes with amide groups have been found to show dimer emission through hydrogen bonding interactions with counter anions even at low concentration. In order to investigate further details of dimer emission, we prepared three Pt complexes, Pt·B(C6F5)4, Pt·Cl, and Pt·PF6, whose counter anions possess different strengths of a hydrogen bonding acceptor. Hydrogen bonding interactions in the ground state and excited-state dynamics of the Pt complexes were evaluated by NMR analysis, temperature dependence, and kinetics of dimer emission...
February 16, 2018: Dalton Transactions: An International Journal of Inorganic Chemistry
https://www.readbyqxmd.com/read/29451125/reduced-integration-and-improved-segregation-of-functional-brain-networks-in-alzheimer-s-disease
#12
A Kabbara, H Eid, W El Falou, M Khalil, F Wendling, M Hassan
OBJECTIVE: Emerging evidence shows that cognitive deficits in Alzheimer's disease (AD) are associated with disruptions in brain functional connectivity. Thus, the identification of alterations in AD functional networks has become a topic of increasing interest. However, to what extent AD induces disruption of the balance of local and global information processing in the human brain remains elusive. The main objective of this study is to explore the dynamic topological changes of AD networks in terms of brain network segregation and integration...
February 16, 2018: Journal of Neural Engineering
https://www.readbyqxmd.com/read/29450984/computational-studies-on-horseshoe-shape-pocket-of-human-orexin-receptor-type-2-and-boat-conformation-of-suvorexant-by-molecular-dynamics-simulations
#13
Qifeng Bai, Horacio Pérez-Sánchez, Zhuoyu Shi, Lanlan Li, Danfeng Shi, Huanxiang Liu, Xiaojun Yao
The FDA approved drug suvorexant binds to the horseshoe shape pocket of OX 2 R with the boat conformation. The horseshoe shape pocket plays an important role on the biological activity of OX 2 R in the cell membrane. To study the binding mechanism between the horseshoe shape pocket of OX 2 R and boat conformation of suvorexant, the crystal structures of wild type and N324A mutant of OX 2 R in complex with antagonist suvorexant are chosen to perform molecular dynamics (MD) simulations, QM/MM and MMGBSA calculations...
February 16, 2018: Chemical Biology & Drug Design
https://www.readbyqxmd.com/read/29450942/multivariate-analysis-of-cytokine-profiles-in-pregnancy-complications
#14
Fawaz Azizieh, Kamaludin Dingle, Raj Raghupathy, Kjell Johnson, Jacob VanderPlas, Ali Ansari
PROBLEM: The immunoregulation to tolerate the semiallogeneic fetus during pregnancy includes a harmonious dynamic balance between anti- and pro-inflammatory cytokines. Several earlier studies reported significantly different levels and/or ratios of several cytokines in complicated pregnancy as compared to normal pregnancy. However, as cytokines operate in networks with potentially complex interactions, it is also interesting to compare groups with multi-cytokine data sets, with multivariate analysis...
March 2018: American Journal of Reproductive Immunology: AJRI
https://www.readbyqxmd.com/read/29450932/cardiorespiratory-noise-correction-improves-the-asl-signal
#15
Mahlega S Hassanpour, Qingfei Luo, W Kyle Simmons, Justin S Feinstein, Martin P Paulus, Wen-Ming Luh, Jerzy Bodurka, Sahib S Khalsa
Cardiorespiratory fluctuations such as changes in heart rate or respiration volume influence the temporal dynamics of cerebral blood flow (CBF) measurements during arterial spin labeling (ASL) fMRI. This "physiological noise" can confound estimates of resting state network activity, and it may lower the signal-to-noise ratio of ASL during task-related experiments. In this study we examined several methods for minimizing the contributions of both synchronized and non-synchronized physiological noise in ASL measures of CBF, by combining the RETROICOR approach with different linear deconvolution models...
February 15, 2018: Human Brain Mapping
https://www.readbyqxmd.com/read/29450931/sulfur-radical-transfer-and-coupling-reaction-to-benzoxazine-groups-a-new-reaction-route-for-preparation-of-polymeric-materials-using-elemental-sulfur-as-a-feedstock
#16
Ho-Keng Lin, Ying-Ling Liu
A novel approach to preparing polymeric materials using elemental sulfur as a feedstock through the newly developed sulfur radical transfer and coupling (SRTC) reaction is reported herein. Polybenzoxazines with high sulfur contents are prepared using the SRTC reaction with benzoxazine compounds as the radical acceptors. The reactions between elemental sulfur and benzoxazine rings are analyzed with Fourier transform infrared (FTIR), 1 H NMR, and 13 C DEPT spectroscopies to elucidate the SRTC reaction mechanism...
February 16, 2018: Macromolecular Rapid Communications
https://www.readbyqxmd.com/read/29450849/impaired-arterial-responsiveness-in-untreated-gout-patients-compared-with-healthy-non-gout-controls-association-with-serum-urate-and-c-reactive-protein
#17
Svetlana Krasnokutsky, Aaron Garza Romero, Daisy Bang, Virginia C Pike, Binita Shah, Talia F Igel, Irina Dektiarev, Yu Guo, Judy Zhong, Stuart D Katz, Michael H Pillinger
To determine whether arterial responsiveness is impaired among patients with gout, and whether arterial responsiveness inversely correlates with serum urate and inflammatory measures. This is a cross-sectional study of untreated gout subjects (n = 34) and non-gout healthy controls (n = 64). High-resolution dynamic ultrasound-measured flow-mediated dilation (FMD) and nitroglycerin-mediated dilation (NMD) assessed endothelium-dependent and endothelium-independent arterial responsiveness respectively. Serum urate (sUA) and high-sensitivity C-reactive protein (hsCRP) were measured in the gout group, and correlated with FMD and NMD responses...
February 15, 2018: Clinical Rheumatology
https://www.readbyqxmd.com/read/29450627/can-the-use-of-a-single-integrated-unitary-autonomic-index-provide-early-clues-for-eventual-eligibility-for-olympic-games
#18
Daniela Lucini, Roberto Sala, Antonio Spataro, Mara Malacarne, Manuela Benzi, Stefano Tamorri, Massimo Pagani
PURPOSE: Optimal autonomic regulation and stress resilience might be considered critical elements of athletic performance. We hypothesize that a novel unitary autonomic index for sports (ANSIs), together with a somatic stress related symptom score (4SQ) might help characterize athletes who were eventually selected for the Rio 2016 Olympic Games Italian team (Rio +). METHODS: In this retrospective study we examined 778 athletes (age 24.4 ± 6.7 yrs) who underwent a planned yearly pre-participation screening...
February 15, 2018: European Journal of Applied Physiology
https://www.readbyqxmd.com/read/29449901/recently-integrated-alu-insertions-in-the-squirrel-monkey-saimiri-lineage-and-application-for-population-analyses
#19
Jasmine N Baker, Jerilyn A Walker, Michael W Denham, Charles D Loupe, Mark A Batzer
Background: The evolution of Alu elements has been ongoing in primate lineages and Alu insertion polymorphisms are widely used in phylogenetic and population genetics studies. Alu subfamilies in the squirrel monkey ( Saimiri ), a New World Monkey (NWM), were recently reported. Squirrel monkeys are commonly used in biomedical research and often require species identification. The purpose of this study was two-fold: 1) Perform locus-specific PCR analyses on recently integrated Alu insertions in Saimiri to determine their amplification dynamics, and 2) Identify a subset of Alu insertion polymorphisms with species informative allele frequency distributions between the Saimiri sciureus and Saimiri boliviensis groups...
2018: Mobile DNA
https://www.readbyqxmd.com/read/29449864/seasonal-variation-in-circulating-group-2-innate-lymphoid-cells-in-mugwort-allergic-asthmatics-during-and-outside-pollen-season
#20
Qing Miao, Yan Wang, Yong-Ge Liu, Yi-Xin Ren, Hui Guan, Zhen Li, Wei Xu, Li Xiang
Background: Group 2 innate lymphoid cells (ILC2s) are a newly identified cell population with the potent capability to produce Th2-type cytokines in a non-antigen specific manner. Previous study demonstrated that enhanced circulating ILC2s in cat-allergic patient after experimental allergen challenge, whereas the effects of natural allergen exposure on peripheral ILC2s are still unclear. We therefore examined the variations in circulating ILC2s among asthmatic patients sensitized to different allergens in- and outside- pollen season...
2018: Allergy, Asthma, and Clinical Immunology
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