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https://www.readbyqxmd.com/read/28536018/physicochemical-and-functional-properties-of-ultrasonic-treated-tragacanth-hydrogels-cross-linked-to-lysozyme
#1
Roya Koshani, Mahmoud Aminlari
The purpose of this study was to prepare, characterize and investigate physiochemical and functional attributes of hen egg white lysozyme (LZM) cross-linked with ultrasonic-treated tragacanth (US-treated TGC) under mild Maillard reactions conditions. FT-IR spectroscopy together with OPA assay revealed that covalent attachment of LZM with TCG's. Under optimum condition (pH=8.5, 60°C, RH=79%, 8 days), only one of the free amino group of LZM was blocked by TGC whereas under the same condition, US treated-TGC's blocked about three amino groups...
May 20, 2017: International Journal of Biological Macromolecules
https://www.readbyqxmd.com/read/28531974/biomimetic-collagen-phospholipid-coatings-improve-formation-of-hydroxyapatite-nanoparticles-on-titanium
#2
Gilia C M Ruiz, Marcos A E Cruz, Amanda N Faria, Daniela C Zancanela, Pietro Ciancaglini, Ana P Ramos
Osseointegration between the surface of a certain material and the host tissue helps to evaluate the potential use of biomaterials in bone replacement. The physicochemical properties and biochemical composition of the material's surface regulates osseointegration. This study investigates how collagen into biomimetic matrixes affects hydroxyapatite (HAp) growth. Collagen was inserted into insoluble Langmuir monolayers containing either 1,2-dipalmitoyl-sn-glycero-3-phosphatidylcholine (DPPC) or octadecylphosphonic acid (OPA) and transferred to titanium (Ti) supports by means of the Langmuir-Blodgett (LB) technique...
August 1, 2017: Materials Science & Engineering. C, Materials for Biological Applications
https://www.readbyqxmd.com/read/28529565/prodelphinidins-isolated-from-chinese-bayberry-leaves-induces-apoptosis-via-the-p53-dependent-signaling-pathways-in-ovcar-3-human-ovarian-cancer-cells
#3
Yu Fu, Xingqian Ye, Malcolm Lee, Gary Rankin, Yi Charlie Chen
Chinese bayberry leaves are rich in prodelphinidins. Since the isolation and purification of prodelphinidins is difficult, the association between the degree of prodelphinidin polymerization and their anti-carcinogenic activity remains ambiguous. The cytotoxic and apoptotic activities of prodelphinidin Chinese bayberry leaf extracts (PCBLs), oligomeric proanthocyanidins (OPAs) and polymeric proanthocyanidins (PPAs), isolated by normal-phase preparative high-performance liquid chromatography were investigated in OVCAR-3 human ovarian cancer cells...
May 2017: Oncology Letters
https://www.readbyqxmd.com/read/28515630/an-exception-to-the-rule-no-association-between-antibiotic-resistance-and-decreased-disinfectant-microbicidal-efficacy-orthophthalaldehyde-opa-and-pseudomonas-aeruginosa-isolated-from-icu-and-paraplegic-patients
#4
REVIEW
R Herruzo, M J Vizcaíno, I Herruzo
BACKGROUND: Antibiotic resistance and decreased susceptibility to disinfectants are not usually associated in microorganisms, but we have found an exception to this rule: P. aeruginosa versus orthophthalaldehyde (OPA). METHODS: Bactericidal effect of OPA was measured at 10 minutes on endodoncy files contaminated with an ATCC strain (control) or 206 strains of P. aeruginosa recently isolated from 206 ICU and paraplegic patients in a tertiary university hospital, in two consecutive years...
March 2017: Journal of Preventive Medicine and Hygiene
https://www.readbyqxmd.com/read/28513316/childhood-socioeconomic-disadvantage-occupational-leisure-time-and-household-physical-activity-and-diabetes-in-adulthood
#5
Vera K Tsenkova, Chioun Lee, Jennifer Morozink Boylan
BACKGROUND: Regular physical activity is a key way to prevent disease. However, we have a limited understanding of the socioeconomic precursors and glucoregulatory sequelae of engaging in physical activity in different domains. METHODS: We examined the associations among lifecourse socioeconomic disadvantage, meeting the physical activity guidelines with leisure-time physical activity (LTPA), occupational physical activity (OPA), or household physical activity (HPA), and prediabetes and diabetes in the MIDUS (Midlife in the U...
May 17, 2017: Journal of Physical Activity & Health
https://www.readbyqxmd.com/read/28512681/evaluation-of-immune-indices-and-serum-vitamin-d-content-in-children-with-atopic-dermatitis
#6
Agnieszka Lipińska-Opałka, Agata Wawrzyniak, Sławomir Lewicki, Robert Zdanowski, Bolesław Kalicki
The influence of vitamin D on allergic diseases, including atopic dermatitis, is linked to the presence of vitamin D nuclear receptors in immune cells. The present study seeks to determine the possible relationship between serum vitamin D content and immune indices in children with atopic dermatitis. The study was conducted in 19 children with atopic dermatitis. The control consisted of 17 age-matched healthy children. A single significant finding was a distinctly lower number of serum regulatory T cells in atopic dermatitis compared with controls (p < 0...
May 17, 2017: Advances in Experimental Medicine and Biology
https://www.readbyqxmd.com/read/28511656/a-randomized-comparison-of-flow-characteristics-of-semiskeletonized-and-pedicled-internal-thoracic-artery-preparations-in-coronary-artery-bypass
#7
Opas Satdhabudha, Narupa Noppawinyoowong
BACKGROUND: Harvesting the internal thoracic artery (ITA) with semiskeletonization is an alternative technique between conventional wide pedicle and skeletonization. It is almost as simple as pedicle harvesting; however, it is supposed to provide the advantage of graft flow and length. Since the heart is unique being the only organ which is perfused during diastole, for comparing the intraoperative graft flow characteristics of semiskeletonization and pedicle technique, we used diastolic filling (DF) using transit-time flow measurement as a primary result...
May 16, 2017: Journal of Cardiothoracic Surgery
https://www.readbyqxmd.com/read/28504016/dna-isolation-by-galactoacrylate-based-nano-poly-hema-co-gal-opa-nanopolymers
#8
Ceren Türkcan Kayhan, Fulden Zeynep Ural, Meryem Koruyucu, Yeşim Gül Salman, Murat Uygun, Deniz Aktaş Uygun, Sinan Akgöl, Adil Denizli
Isolation of DNA is one of the important processes for biotechnological applications such as investigation of DNA structures and functions, recombinant DNA preparations, identification of genetic factors and diagnosis and treatment of genetic disorders. The aim of this study was to synthesis and characterizes the galactoacrylate based nanopolymers with high surface area and to investigate the usability of these synthesized nanopolymers for DNA isolation studies. Nanopolymers were synthesized by the surfactant free emulsion polymerization technique by using the monomers of 2-hydroxyl ethylmethacrylate and 6-O-(2(')-hydroxy-3'-acryloyloxypropyl)-1,2:3,4-di-O-isopropylidene-α-D-galactopyranose...
May 15, 2017: Journal of Biomaterials Science. Polymer Edition
https://www.readbyqxmd.com/read/28499144/patterns-of-response-to-scrambled-scenes-reveal-the-importance-of-visual-properties-in-the-organization-of-scene-selective-cortex
#9
David M Watson, Tom Hartley, Timothy J Andrews
Neuroimaging studies have found distinct patterns of neural response to different categories of scene in scene-selective regions of the human brain. However, it is not clear how information about scene category is represented in these regions. Images from different categories vary systematically in their visual properties as well as their semantic category. So, it is possible that patterns of neural response could reflect variation in visual properties. To address this question, we used fMRI to measure patterns of neural response to intact and scrambled scene categories...
April 21, 2017: Cortex; a Journal Devoted to the Study of the Nervous System and Behavior
https://www.readbyqxmd.com/read/28482207/evaluation-of-graphical-and-statistical-representation-of-analytical-signals-of-spectrophotometric-methods
#10
Hayam Mahmoud Lotfy, Yasmin Mohammed Fayez, Shereen Mostafa Tawakkol, Nesma Mahmoud Fahmy, Mostafa Abd El-Atty Shehata
Simultaneous determination of miconazole (MIC), mometasone furaoate (MF), and gentamicin (GEN) in their pharmaceutical combination. Gentamicin determination is based on derivatization with of o-phthalaldehyde reagent (OPA) without any interference of other cited drugs, while the spectra of MIC and MF are resolved using both successive and progressive resolution techniques. The first derivative spectrum of MF is measured using constant multiplication or spectrum subtraction, while its recovered zero order spectrum is obtained using derivative transformation...
April 20, 2017: Spectrochimica Acta. Part A, Molecular and Biomolecular Spectroscopy
https://www.readbyqxmd.com/read/28479175/immunogenicity-and-safety-of-13-valent-pneumococcal-conjugate-vaccine-pcv13-formulated-with-2-phenoxyethanol-in-multidose-vials-given-with-routine-vaccination-in-healthy-infants-an-open-label-randomized-controlled-trial
#11
Olubukola T Idoko, Robert B Mboizi, Michael Okoye, France Laudat, Bubacarr Ceesay, John Z Liang, Natacha Le Dren-Narayanin, Kathrin U Jansen, Alejandra Gurtman, Kimberly J Center, Daniel A Scott, Beate Kampmann, Anna Roca
BACKGROUND: This open-label randomized controlled trial in infants compared safety, tolerability, and immunogenicity of the 13-valent pneumococcal conjugate vaccine (PCV13) formulated with the preservative 2-phenoxyethanol (2-PE) in a multidose vial (MDV) to the current PCV13 without 2-PE in a single-dose syringe (SDS). METHODS: Gambian infants were randomized 1:1 to receive PCV13 as either MDV or SDS at ages 2, 3, and 4months. Serotype-specific antipneumococcal antibody responses and opsonophagocytic activity ([OPA]; subset) were measured at age 5months...
May 31, 2017: Vaccine
https://www.readbyqxmd.com/read/28472190/on-the-health-paradox-of-occupational-and-leisure-time-physical-activity-using-objective-measurements-effects-on-autonomic-imbalance
#12
David M Hallman, Marie Birk Jørgensen, Andreas Holtermann
OBJECTIVE: Leisure-time physical activity (LTPA) has considerable benefits for cardiovascular health and longevity, while occupational physical activity (OPA) is associated with an elevated cardiovascular risk. This "health paradox" may be explained by different effects on the autonomic nervous system from OPA and LTPA. Thus, we aimed to investigate whether objectively measured OPA and LTPA are differentially associated with autonomic regulation among workers. METHODS: The study comprised 514 blue-collar workers from the Danish cohort DPHACTO...
2017: PloS One
https://www.readbyqxmd.com/read/28462746/disinfectant-susceptibility-profiling-of-glutaraldehyde-resistant-nontuberculous-mycobacteria
#13
Winona Burgess, Alyssa Margolis, Sara Gibbs, Rafael Silva Duarte, Mary Jackson
OBJECTIVE Activated alkaline glutaraldehyde (GTA) remains one of the most widely used high-level disinfectants worldwide. However, several reports have highlighted the potential for nontuberculous mycobacteria to develop high-level resistance to this product. Because aldehyde resistance may lead to cross-resistance to other biocides, we investigated the susceptibility profile of GTA-resistant Mycobacterium chelonae and M. abscessus isolates to various disinfectant chemistries. METHODS High-level disinfectants commonly used in the reprocessing of endoscopes and other heat-sensitive, semicritical medical equipment, including different formulations of aldehyde-based products and oxidizing agents, were tested against 10 slow- and fast-growing, GTA-susceptible and GTA-resistant, Mycobacterium isolates in suspension tests and carrier tests at different temperatures...
May 2, 2017: Infection Control and Hospital Epidemiology
https://www.readbyqxmd.com/read/28458236/large-volume-constant-concentration-sampling-technique-coupling-with-surface-enhanced-raman-spectroscopy-for-rapid-on-site-gas-analysis
#14
Zhuomin Zhang, Yisen Zhan, Yichun Huang, Gongke Li
In this work, a portable large-volume constant-concentration (LVCC) sampling technique coupling with surface-enhanced Raman spectroscopy (SERS) was developed for the rapid on-site gas analysis based on suitable derivatization methods. LVCC sampling technique mainly consisted of a specially designed sampling cell including the rigid sample container and flexible sampling bag, and an absorption-derivatization module with a portable pump and a gas flowmeter. LVCC sampling technique allowed large, alterable and well-controlled sampling volume, which kept the concentration of gas target in headspace phase constant during the entire sampling process and made the sampling result more representative...
April 24, 2017: Spectrochimica Acta. Part A, Molecular and Biomolecular Spectroscopy
https://www.readbyqxmd.com/read/28454008/reactions-of-hypoiodous-acid-with-model-compounds-and-the-formation-of-iodoform-in-absence-presence-of-permanganate
#15
Xiaodan Zhao, Jun Ma, Urs von Gunten
The kinetics for the reactions of hypoiodous acid (HOI) with various phenols (phenol, 4-nitrophenol, 4-hydroxybenzoic acid), 3-oxopentanedioic acid (3-OPA) and flavone were investigated in the pH range of 6.0-11.0. The apparent second order rate constants for the reactions of HOI with phenolic compounds, 3-OPA, flavone and citric acid at pH 8.0 are 10-10(7) M(-1)s(-1), (4.0 ± 0.3) × 10(3) M(-1)s(-1), (2.5 ± 0.2) × 10(3) M(-1)s(-1) and <1 M(-1)s(-1), respectively. The effect of buffer type and concentration was investigated with acetate, phosphate and borate...
April 13, 2017: Water Research
https://www.readbyqxmd.com/read/28443487/objectively-measured-physical-activity-and-12-month-trajectories-of-neck-shoulder-pain-in-workers-a-prospective-study-in-dphacto
#16
David M Hallman, Marie Birk Jørgensen, Andreas Holtermann
AIMS: This study aimed to investigate the association between objectively measured physical activity at work and leisure and the intensity (mean level and time course) of neck-shoulder pain (NSP) over 12 months among male and female blue collar workers. METHODS: Data were obtained from 625 blue collar workers from the Danish cohort DPHACTO. Physical activity was measured objectively at baseline using accelerometers. The percentage of time spent in physical activity (walking, climbing stairs, running and cycling) was calculated for both work and leisure time...
May 2017: Scandinavian Journal of Public Health
https://www.readbyqxmd.com/read/28434939/calreticulin-is-required-for-tgf-%C3%AE-induced-epithelial-to-mesenchymal-transition-during-cardiogenesis-in-mouse-embryonic-stem-cells
#17
Fereshteh Karimzadeh, Michal Opas
Calreticulin, a multifunctional endoplasmic reticulum resident protein, is required for TGF-β-induced epithelial-to-mesenchymal transition (EMT) and subsequent cardiomyogenesis. Using embryoid bodies (EBs) derived from calreticulin-null and wild-type (WT) embryonic stem cells (ESCs), we show that expression of EMT and cardiac differentiation markers is induced during differentiation of WT EBs. This induction is inhibited in the absence of calreticulin and can be mimicked by inhibiting TGF-β signaling in WT cells...
May 9, 2017: Stem Cell Reports
https://www.readbyqxmd.com/read/28433865/high-sensitivity-hplc-method-for-analysis-of-in-vivo-extracellular-gaba-using-optimized-fluorescence-parameters-for-o-phthalaldehyde-opa-sulfite-derivatives
#18
Shannon L Zandy, James M Doherty, Nathan D Wibisono, Rueben A Gonzales
Reversed-phase HPLC with derivatization using o-phthalaldehyde (OPA) and sulfite allows electrochemical detection of γ-aminobutyric acid (GABA) in microdialysis samples. However, OPA/sulfite derivatives have been reported to produce lower fluorescent yield than OPA derivatives using organic thiols as the nucleophile. To overcome this limitation we examined excitation and emission spectra, reaction time, pH, and concentration of reagents in the derivatization solution. Optimal detection parameters were determined as λex=220nm and λem=385nm for maximal fluorescence...
April 3, 2017: Journal of Chromatography. B, Analytical Technologies in the Biomedical and Life Sciences
https://www.readbyqxmd.com/read/28420726/intra-and-inter-observer-reproducibility-assessment-of-pd-l1-biomarker-in-non-small-cell-lung-cancer-nsclc
#19
Wendy A Cooper, Prudence A Russell, Maya Cherian, Edwina E Duhig, David Godbolt, Peter J Jessup, Christine Khoo, Connull Leslie, Annabelle Mahar, David F Moffat, Vanathi Sivasubramaniam, Céline Faure, Alena Reznichenko, Amanda Grattan, Stephen B Fox
<br />Reliable and reproducible methods for identifying PD-L1 expression on tumor cells are necessary to identify responders to anti-PD-1 therapy. We tested the reproducibility of the assessment of PD-L1 expression in non-small cell lung cancer (NSCLC) tissue samples by pathologists.<br />Experimental Design: <br />NSCLC samples were stained with PD-L1 22C3 pharmDx™ kit using the Dako Autostainer Link 48 Platform. Two sample sets of 60 samples each were designed to assess inter- and intra-observer reproducibility considering 2 cut-points for positivity: 1% or 50% of PD-L1 stained tumor cells...
April 18, 2017: Clinical Cancer Research: An Official Journal of the American Association for Cancer Research
https://www.readbyqxmd.com/read/28419107/characterization-of-a-transgenic-mouse-model-exhibiting-spontaneous-lung-adenocarcinomas-with-a-metastatic-phenotype
#20
Hsuen-Wen Chang, Zih-Miao Lin, Min-Ju Wu, Li-Yu Wang, Yen-Hung Chow, Shih Sheng Jiang, Hui-Ju Ch'ang, Vincent Hs Chang
Developing lung cancer in mouse models that display similarities of both phenotype and genotype will undoubtedly provide further and better insights into lung tumor biology. Moreover, a high degree of pathophysiological similarity between lung tumors from mouse models and their human counterparts will make it possible to use these mouse models for preclinical tests. Ovine pulmonary adenocarcinomas (OPAs) present the same symptoms as adenocarcinomas in humans and are caused by a betaretrovirus. OPAs have served as an exquisite model of carcinogenesis for human lung adenocarcinomas...
2017: PloS One
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