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https://www.readbyqxmd.com/read/27914031/a-simple-spectrofluorimetric-method-for-iron-determination-with-a-chalcone-based-schiff-base
#1
Nurhayat Özbek, Hakan Alp, Gonca Çelik, Tuğba Ak, Osman Can Çağılcı, Nurettin Yaylı, Ümmühan Ocak, Miraç Ocak
A chalcone-based Schiff base (5), capable of detecting iron (III) in partially aqueous media, has been designed, then synthesized by the condensation of 3-formyl-2-hydroxyquinoline and acetophenone. To determine iron (III) ion, a simple spectrofluorimetric method was developed by using the synthesized Schiff base. The developed method was validated by analyzing the certified reference material (CRM-SA-C Sandy Soil C). During the process of the determination of iron in food samples, satisfactory accuracy was obtained for spinach and rocket...
December 2, 2016: Journal of Fluorescence
https://www.readbyqxmd.com/read/27913019/persistent-organic-pollutants-in-shallow-percolated-water-of-the-alps-karst-system-zugspitze-summit-germany
#2
Walkiria Levy, Marchela Pandelova, Bernhard Henkelmann, Silke Bernhöft, Norbert Fischer, Felix Antritter, Karl-Werner Schramm
In the German Calcareous Alps at the Zugspitze, percolated water close to a permafrost bedrock in a tunnel system was monitored long-term for polychlorinated dibenzo-p-dioxins (PCDD), polychlorinated dibenzofurans (PCDF), polychlorinated biphenyls (PCB), polycyclic aromatic hydrocarbons (PAH), and 28 organochlorine pesticides (OCP). Semi-permeable membrane devices (SPMD) were deployed in a temporary surface water system at the Zugspitze plateau and analysed for PCB, PAH, and OCP. The high-volume water sampling was successfully implemented and all compounds were identified in the water percolated through the Karst system...
November 30, 2016: Science of the Total Environment
https://www.readbyqxmd.com/read/27910816/the-stimulatory-effect-of-silica-nanoparticles-on-osteogenic-differentiation-of-human-mesenchymal-stem-cells
#3
Xing Yang, Yuanyuan Li, Xujie Liu, Qianli Huang, Wei He, Ranran Zhang, Qingling Feng, Dafna Benayahu
Silica-based materials with favourable biocompatibility are generally considered as excellent candidates for applications in biomedical fields. However, previous researches mainly focused on the safety of silica-based materials, their effects on osteogenic differentiation of human mesenchymal stem cells (hMSCs) still need further investigations. In this study, core-shell fluorescent silica nanoparticles (silica NPs) with three different sizes (S1 ~ 50 nm, S2 ~ 200 nm, S3 ~ 400 nm, respectively) were prepared according to the Stöber method...
December 2, 2016: Biomedical Materials
https://www.readbyqxmd.com/read/27910723/powered-mobility-intervention-understanding-the-position-of-tool-use-learning-as-part-of-implementing-the-alp-tool
#4
Lisbeth Nilsson, Josephine Durkin
PURPOSE: To explore the knowledge necessary for adoption and implementation of the Assessment of Learning Powered mobility use (ALP) tool in different practice settings for both adults and children. To consult with a diverse population of professionals working with adults and children, in different countries and various settings; who were learning about or using the ALP tool, as part of exploring and implementing research findings. METHOD: Classical grounded theory with a rigorous comparative analysis of data from informants together with reflections on our own rich experiences of powered mobility practice and comparisons with the literature...
December 2, 2016: Disability and Rehabilitation. Assistive Technology
https://www.readbyqxmd.com/read/27909721/protective-effect-of-vk2-on-glucocorticoid-treated-mc3t3-e1-cells
#5
Yue-Lei Zhang, Jun-Hui Yin, Hao Ding, Wei Zhang, Chang-Qing Zhang, You-Shui Gao
Glucocorticoids (GCs) contribute to the increased incidence of secondary osteoporosis and osteonecrosis, and medications for the prevention and treatment of these complications have been investigated for many years. Vitamin K2 (VK2) has been proven to promote bone formation both in vitro and in vivo. In this study, we examined the effects of VK2 on dexamethasone (DEX)-treated MC3T3-E1 osteoblastic cells. We observed that VK2 promoted the proliferation and enhanced the survival of dexamethasone-treated MC3T3-E1 cells...
December 1, 2016: International Journal of Molecular Medicine
https://www.readbyqxmd.com/read/27909547/gastrointestinal-tract-access-for-urological-natural-orifice-transluminal-endoscopic-surgery
#6
REVIEW
Olga Miakicheva, Zachary Hamilton, Alp T Beksac, Sean W Berquist, Abd-Elrahman Hassan, Marc Holden, Ithaar H Derweesh
We conducted a literature review of natural orifice transluminal endoscopic surgery (NOTES), focusing on urologic procedures with gastrointestinal tract access, to update on the development of this novel surgical approach. As part of the methods, a comprehensive electronic literature search for NOTES was conducted using PubMed and Cochrane Library from March 2002 to February 2016 for papers reporting urologic procedures performed utilizing gastrointestinal tract access. A total of 11 peer-reviewed studies examining utility of gastrointestinal access for NOTES urologic procedures were noted, with the first report in 2007...
November 16, 2016: World Journal of Gastrointestinal Endoscopy
https://www.readbyqxmd.com/read/27908964/effects-of-the-etonogestrel-contraceptive-implant-implanon%C3%A2-on-bone-metabolism-during-lactation-a-prospective-study
#7
Candan Iltemir Duvan, Yuksel Onaran, Esra Aktepe Keskin, Ebru Yüce, Burcu Yanık, Hasan Kafali, Nilgun Ozturk Turhan
AIM: To evaluate the effects of the etonogestrel contraceptive implant (Implanon(®)) on bone metabolism in lactating women using markers for bone formation and resorption. STUDY DESIGN: This single-centre, prospective cohort study was conducted in Turgut Ozal University Medical Faculty Obstetrics and Gynecology Department with healthy lactating women aged between 24 and 38 years to compare the effect on bone metabolism of 6 months' use of either the implant or a non-hormonal contraceptive method...
December 1, 2016: Journal of Family Planning and Reproductive Health Care
https://www.readbyqxmd.com/read/27908622/biomonitoring-of-persistent-organic-pollutants-pops-in-child-populations-living-near-contaminated-sites-in-mexico
#8
R Flores-Ramírez, F J Pérez-Vázquez, M Rodríguez-Aguilar, S E Medellín-Garibay, E Van Brussel, A C Cubillas-Tejeda, L Carrizales-Yáñez, F Díaz-Barriga
The aim of this study was to conduct a POP biomonitoring programme for children in high-risk areas. We evaluated 247 serum samples from children between the ages of 6 and 12years old from two zones in Mexico: (1) indigenous zones, which included Cuatlamayan (CUA), Tocoy (TOC), and Santa Maria Picula (SAM); and (2) industrial zones, which included Tercera Chica (TC), Industrial San Luis (IND) and Rincon de San Jose (SJR); Mundo Nuevo (MN); and Alpuyeca (ALP). Our results showed that α-endosulfan was similar to CUA, TOC, SAM, TC and MN (178...
November 28, 2016: Science of the Total Environment
https://www.readbyqxmd.com/read/27906470/retrospective-evaluation-of-whole-body-computed-tomography-for-tumor-staging-in-dogs-with-primary-appendicular-osteosarcoma
#9
Jessica L Talbott, Sarah E Boston, Rowan J Milner, Amandine Lejeune, Carlos H de M Souza, Kelvin Kow, Nicholas J Bacon, Jorge A Hernandez
OBJECTIVE: To evaluate whole body computed tomography (CT) for staging canine appendicular osteosarcoma. STUDY DESIGN: Retrospective case series. ANIMALS: Client-owned dogs diagnosed with appendicular osteosarcoma (n=39). METHODS: Medical records for client-owned dogs diagnosed with appendicular osteosarcoma from August 2008 to July 2014 were reviewed. Dogs were included if they had a confirmed diagnosis of appendicular osteosarcoma and were staged using whole body CT...
December 1, 2016: Veterinary Surgery: VS
https://www.readbyqxmd.com/read/27906446/study-on-adhesion-proliferation-and-differentiation-of-osteoblasts-promoted-by-new-absorbable-bioactive-glass-injection-in-vitro
#10
A Axrap, J Wang, Y Liu, M Wang, A Yusuf
OBJECTIVE: The objective of this study was to evaluate adhesion, proliferation and differentiation of osteoblasts grown on absorbable bioactive glass-calcium phosphate cement injection (BG-CPC) materials in vitro. MATERIALS AND METHODS: BG-CPC composite biomaterial samples were prepared in vitro, for culture with MC3T3-E1 rat osteoblasts. Cells were divided into CPC, BG and BG-CPC treated groups. After cultivation for 3d, cells were stained with rhodamine-phalloidin and 4',6-diamidino-2-phenylindole (DAPI) and observed by fluorescence microscopy for osteoblast morphology on the surface of biomaterials...
November 2016: European Review for Medical and Pharmacological Sciences
https://www.readbyqxmd.com/read/27906017/incidence-and-risk-factors-for-liver-enzymes-elevations-in-highly-treatment-experienced-patients-switching-from-enfuvirtide-to-raltegravir-a-sub-study-of-the-anrs-138-easier-trial
#11
Nathalie de Castro, Joséphine Braun, Isabelle Charreau, Alain Lafeuillade, Jean-Paul Viard, Clotilde Allavena, Jean-Pierre Aboulker, Jean-Michel Molina
BACKGROUND: In the ANRS EASIER trial where treatment-experienced patients switched from enfuvirtide (ENF) to raltegravir (RAL), a high incidence of transaminase elevation was reported in the RAL arm. METHODS: We compared the incidence of emergent liver enzyme elevations (LEE) of grade 2 or more among patients randomized to the maintenance ENF arm or the switch RAL arm up to W24. We also assessed the overall incidence of LEE over the 48-week duration of the trial and baseline risk factors for grade 2 or more alanine aminotransferase (ALT) elevation using univariate and multivariate analyses...
April 2, 2016: AIDS Research and Therapy
https://www.readbyqxmd.com/read/27905856/1-25-dihydroxyvitamin-d3-stimulates-odontoblastic-differentiation-of-human-dental-pulp-stem-cells-in-vitro
#12
Goksen Mucuk, Elif Sepet, Mine Erguven, Ozlem Ekmekci, Ayhan Bilir
BACKGROUND: 1,25-dihydroxyvitamin D3 (1,25-OH D3) plays an important role in mineralized tissue metabolism, including teeth. However, few studies have addressed its role in odontoblastic differentiation of human dental pulp-stem cells (hDPSCs). AIM: This study aimed to understand the influence of various concentrations of 1,25-OH D3 on the proliferation capacity and early dentinogenesis responses of hDPSCs. MATERIALS AND METHODS: hDPSCs were obtained from the impacted third molar teeth...
December 1, 2016: Connective Tissue Research
https://www.readbyqxmd.com/read/27904711/naringin-promotes-osteogenic-differentiation-of-bone-marrow-stromal-cells-by-up-regulating-foxc2-expression-via-the-ihh-signaling-pathway
#13
Fei-Xiang Lin, Shi-Xin Du, De-Zhong Liu, Qin-Xiao Hu, Guo-Yong Yu, Chu-Cheng Wu, Gui-Zhou Zheng, Da Xie, Xue-Dong Li, Bo Chang
Naringin is an active compound extracted from Rhizoma Drynariae, and studies have revealed that naringin can promote proliferation and osteogenic differentiation of bone marrow stromal cells (BMSCs). In this study, we explored whether naringin could promote osteogenic differentiation of BMSCs by upregulating Foxc2 expression via the Indian hedgehog (IHH) signaling pathway. BMSCs were cultured in basal medium, basal medium with naringin, osteogenic induction medium, osteogenic induction medium with naringin and osteogenic induction medium with naringin in the presence of the IHH inhibitor cyclopamine (CPE)...
2016: American Journal of Translational Research
https://www.readbyqxmd.com/read/27904672/t3-inhibits-the-calcification-of-vascular-smooth-muscle-cells-and-the-potential-mechanism
#14
Xiaodan Chang, Baohong Zhang, Li Lihua, Zhichun Feng
OBJECTIVE: This study aimed to investigate the potential molecular mechanism underlying the T3 induced vascular calcification and phenotype transformation of vascular smooth muscle cells (VSMCs). METHODS: Rat thoracic aortic smooth muscle cells (A7r5) were cultured in vitro and randomly assigned into normal control group, calcification group, T3 group and inhibitor group. RESULTS: When compared with normal control group, the osteocalcin content, ALP activity, Osterix and Runx2 mRNA expression and OPN protein expression increased significantly (P<0...
2016: American Journal of Translational Research
https://www.readbyqxmd.com/read/27902317/psychromicrobium-silvestre-gen-nov-sp-nov-a-novel-actinobacterium-isolated-from-alpine-forest-soils
#15
Peter Schumann, De-Chao Zhang, Luís Franca, Luciana Albuquerque, Milton S da Costa, Rosa Margesin
Two Gram-stain-variable, non-motile, catalase-positive and cytochrome c oxidase-negative bacteria, designated AK20-18T and AM20-54, were isolated from forest soil samples collected in the Italian Alps. Growth occurred at a temperature range of 5-30 °C, at pH 6-9 and in the presence of 0-5 % (w/v) NaCl. The 16S rRNA gene sequence similarity between strains AK20-18T and AM20-54 was 100 %. Phylogenetic analysis based on 16S rRNA gene sequence showed that AK20-18T had highest 16S rRNA gene sequence similarity with the type strain of Arthrobacter psychrochitiniphilus (96...
November 21, 2016: International Journal of Systematic and Evolutionary Microbiology
https://www.readbyqxmd.com/read/27902302/polynucleobacter-wuianus-sp-nov-a-free-living-freshwater-bacterium-affiliated-with-the-cryptic-species-complex-pnecc
#16
Martin W Hahn, Lesley R Huymann, Ulrike Koll, Johanna Schmidt, Elke Lang, Matthias Hoetzinger
Strain QLW-P1FAT50C-4T, isolated from a shallow acidic freshwater pond located in the Austrian Alps at an altitude of 1300 m, was characterized by investigation of phenotypic, chemotaxonomic and genomic traits. As shown previously, phylogenetic analyses based on 16S rRNA gene sequences place the strain in the cryptic species complex PnecC within the genus Polynucleobacter. The major fatty acids of the strain were C16:1 ω7c and C18:1 ω7c. The strain has a genome of 2.23 Mbp with a GC content of 44.9 mol%. The strain encodes a seemingly complete gene cluster for anoxygenic photosynthesis but lacks typical genes for CO2 assimilation...
November 2, 2016: International Journal of Systematic and Evolutionary Microbiology
https://www.readbyqxmd.com/read/27901343/colonization-of-snow-by-microorganisms-as-revealed-using-miniature-raman-spectrometers-possibilities-for-detecting-carotenoids-of-psychrophiles-on-mars
#17
Jan Jehlička, Adam Culka, Linda Nedbalová
We tested the potential of a miniaturized Raman spectrometer for use in field detection of snow algae pigments. A miniature Raman spectrometer, equipped with an excitation laser at 532 nm, allowed for the detection of carotenoids in cells of Chloromonas nivalis and Chlamydomonas nivalis at different stages of their life cycle. Astaxanthin, the major photoprotective pigment, was detected in algal blooms originating in snows at two alpine European sites that differed in altitude (Krkonoše Mts., Czech Republic, 1502 m a...
November 30, 2016: Astrobiology
https://www.readbyqxmd.com/read/27901181/evaluation-of-preoperative-ultrasonographic-and-biochemical-features-of-patients-with-aggressive-parathyroid-disease-is-there-a-reliable-predictive-marker
#18
Bekir Cakir, Sefika Burcak Polat, Mehmet Kilic, Didem Ozdemir, Cevdet Aydin, Nuran Süngü, Reyhan Ersoy
Objective: Parathyroid cancer (PC) represents < 1% of cases of PHPT. Tumors demonstrating atypical histopathologic features and don't fulfill criteria for carcinoma are classified as atypical adenomas (APA). The purpose of this study was to determine a biochemical or ultrasonographic feature that can predict aggressive disease requiring more extensive surgery and closer follow-up. Subjects and methods: Twenty eight patients operated for PHPT and diagnosed with atypical adenoma (23 patients) or carcinoma (5 patients) were enrolled in this study...
November 24, 2016: Archives of Endocrinology and Metabolism
https://www.readbyqxmd.com/read/27897998/a-new-two-photon-ratiometric-fluorescent-probe-for-detecting-alkaline-phosphatase-in-living-cells
#19
Xiaohong Zhou, Yuren Jiang, Xiongjie Zhao, Yao Zhu
Alkaline phosphatase (ALP) is an important diagnostic indicator of many human diseases. To quantitatively track ALP in biosystems, herein, for the first time, we report an efficient two-photon ratiometric fluorescent probe, termed probe 1 and based on classic naphthalene derivatives with a donor-π-acceptor (D-π-A) structure and deprotection of the phosphoric acid moiety by ALP. The presence of ALP causes the cleave of the phosphate group from naphthalene derivatives and the phosphate group changes the ability of the intramolecular charge transfer (ICT) and remarkably alters the probe's photophysical properties, thus an obvious ratiometric signal with an isoemissive point is observed...
November 25, 2016: Molecules: a Journal of Synthetic Chemistry and Natural Product Chemistry
https://www.readbyqxmd.com/read/27897429/temporal-variability-of-bacterial-communities-in-cryoconite-on-an-alpine-glacier
#20
Andrea Franzetti, Federico Navarra, Ilario Tagliaferri, Isabella Gandolfi, Giuseppina Bestetti, Umberto Minora, Roberto Sergio Azzoni, Guglielmina Diolaiuti, Claudio Smiraglia, Roberto Ambrosini
Cryoconite holes, i.e. small ponds that form on glacier surface, are considered the most biologically active environments on glaciers. Bacterial communities in these environments have been extensively studied, but often through snapshot studies based on the assumption of a general stability of community structure. In this study, we investigated the temporal variation of bacterial communities in cryoconite holes on the Forni Glacier (Italian Alps) by high throughput DNA sequencing. We found a temporal change of bacterial communities, with autotrophic Cyanobacteria populations dominating communities after snowmelt, and heterotrophic Sphingobacteriales populations increasing in abundance later in the season...
November 29, 2016: Environmental Microbiology Reports
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