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https://www.readbyqxmd.com/read/29150133/effect-of-coloring-and-sintering-on-the-translucency-and-biaxial-strength-of-monolithic-zirconia
#1
Nazmiye Sen, Ibrahim Bülent Sermet, Sevki Cinar
STATEMENT OF PROBLEM: The influences of coloring and sintering procedures on the optical and mechanical properties of monolithic zirconia have not been thoroughly investigated. PURPOSE: The purpose of this in vitro study was to investigate the effects of the coloring procedure and of varying final sintering temperatures on the translucency parameter (TP) and biaxial flexural strength (BFS) of monolithic zirconia. MATERIAL AND METHODS: Disk-shaped specimens (N=210) of 2 different monolithic zirconia brands (Vita YZ HT(White) [VYZa]; Vita YZ HT(Color) A2 [VYZb]; Prettau Zirkonzahn [PZ]; Prettau Anterior Zirkonzahn [PZA]) with a diameter of 15 mm and a thickness of 1...
November 15, 2017: Journal of Prosthetic Dentistry
https://www.readbyqxmd.com/read/29146934/a-continuous-13-3-ka-record-of-seismogenic-dust-events-in-lacustrine-sediments-in-the-eastern-tibetan-plateau
#2
Hanchao Jiang, Ning Zhong, Yanhao Li, Xiaolin Ma, Hongyan Xu, Wei Shi, Siqi Zhang, Gaozhong Nie
Lacustrine sediments on the eastern Tibetan Plateau (TP) contain a wealth of information on local and regional tectonic activity. High-resolution grain-size and magnetic susceptibility measurements were conducted on the 23.4-m-thick Lixian lacustrine sedimentary sequence spanning from 19.3 to 6.0 ka, revealing 70 prehistoric seismic events on the eastern TP. The seismic events caused intermittent increases in source materials that endowed the samples of an individual event layer with a gradual fining trend along the C = M line on a C (one percentile)-M (median diameter) plot...
November 16, 2017: Scientific Reports
https://www.readbyqxmd.com/read/29146347/effect-of-tea-products-on-the-in-vitro-enzymatic-digestibility-of-starch
#3
Haihua Zhang, Yulan Jiang, Junxian Pan, Yangjun Lv, Jun Liu, Shikang Zhang, Yuejin Zhu
The importance of postprandial hyperglycemia in the treatment of diabetes has been recognized recently. Tea products, such as tea polyphenols (TP), epigallocatechin gallate (EGCG), matcha, and instant tea, were chosen as constituents of tea-flour food, aimed at regulating the release of glucose from starchy foods in the postprandial period. Six starches were chosen for internal composition analysis and hydrolysis studies in vitro. Corn starch, wheat starch, and lily root flour appeared to have higher resistant starch content, slower digestion profiles, and lower kinetic constants, implying sustained release of glucose in the gastrointestinal tract...
March 15, 2018: Food Chemistry
https://www.readbyqxmd.com/read/29145115/effect-of-salinity-on-removal-performance-and-activated-sludge-characteristics-in-sequencing-batch-reactors
#4
Yujuan Chen, Huijun He, Hongyu Liu, Huiru Li, Guangming Zeng, Xing Xia, Chunping Yang
The removal performance, activated sludge characteristics and microbial community in sequencing batch reactors (SBRs) were studied at salinity ranging from 0 to 20 g/L. Results showed that salinity deteriorated the removal performance. Removal rate of ammonium (NH4(+)-N), total phosphorus (TP) and chemical oxygen demand (COD) were gradually dropped from 95.34%, 93.58% and 94.88% (0 g/L) to 62.98%, 55.64% and 55.78% (20 g/L), respectively. The removals of NH4(+)-N and TP were mainly influenced during aerobic phase...
October 31, 2017: Bioresource Technology
https://www.readbyqxmd.com/read/29143477/gastric-venous-congestion-and-bleeding-in-association-with-total-pancreatectomy
#5
Akimasa Nakao, Suguru Yamada, Tsutomu Fujii, Haruyoshi Tanaka, Kenji Oshima, Yukiko Oshima, Kiyotsugu Iede, Hironobu Kobayashi, Yasunori Kimura, Yasuhiro Kodera
BACKGROUND: Gastric venous congestion and bleeding in association with total pancreatectomy (TP) were evaluated. METHODS: Thirty-eight patients of TP were retrospectively analyzed. TP was classified as TP with distal gastrectomy (TPDG), pylorus-preserving TP (PPTP), subtotal stomach-preserving TP (SSPTP), and TP with segmental duodenectomy (TPSD). RESULTS: Portal vein or superior mesenteric vein resection and reconstruction was performed in 24 patients (62...
November 16, 2017: Journal of Hepato-biliary-pancreatic Sciences
https://www.readbyqxmd.com/read/29142648/comparison-of-the-optical-properties-of-pre-colored-dental-monolithic-zirconia-ceramics-sintered-in-a-conventional-furnace-versus-a-microwave-oven
#6
Hee-Kyung Kim, Sung-Hun Kim
PURPOSE: The purpose of this study was to compare the optical properties of pre-colored dental monolithic zirconia ceramics of various thicknesses sintered in a microwave and those in a conventional furnace. MATERIALS AND METHODS: A2-shade of pre-colored monolithic zirconia ceramic specimens (22.0 mm × 22.0 mm) in 3 thickness groups of 0.5, 1.0, and 1.5 mm were divided into 2 subgroups according to the sintering methods (n=9): microwave and conventional sintering...
October 2017: Journal of Advanced Prosthodontics
https://www.readbyqxmd.com/read/29142641/accuracy-of-several-implant-bite-registration-techniques-an-in-vitro-pilot-study
#7
Do-Hyun Park, Ji-Man Park, Jae-Won Choi, Eun-Sook Kang, Eun-Bin Bae, Young-Chan Jeon, Chang-Mo Jeong, Mi-Jung Yun, Jung-Bo Huh
PURPOSE: This study evaluated the accuracies of different bite registration techniques for implant-fixed prostheses using three dimensional file analysis. MATERIALS AND METHODS: Implant fixtures were placed on the mandibular right second premolar, and the first and second molar in a polyurethane model. Aluwax (A), Pattern Resin (P), and Blu-Mousse (B) were used as the bite registration materials on the healing abutments (H) or temporary abutments (T). The groups were classified into HA, HP, HB, TA, TP, and TB according to each combination...
October 2017: Journal of Advanced Prosthodontics
https://www.readbyqxmd.com/read/29136375/a-modified-sample-preparation-approach-for-the-determination-of-the-phenolic-and-humic-like-substances-in-natural-organic-materials-by-the-folin-ciocalteu-method
#8
Ludovico Pontoni, Antonio Panico, Alessia Matanò, Eric D van Hullebusch, Massimiliano Fabbricino, Giovanni Esposito, Francesco Pirozzi
A novel modification of the Folin-Ciocalteu colorimetric assay sample preparation for the determination of total phenolic compounds in natural solid and semi-solid organic materials (e.g., foods, organic solid waste, soils, plant tissues, agricultural residues, manure, etc.) is proposed. In this method the sample is prepared by adding sodium sulfate as solid diluting agent before homogenization. The method allows the determination of total phenols (TP) in samples with high solids content, and it provides good accuracy and reproducibility...
November 14, 2017: Journal of Agricultural and Food Chemistry
https://www.readbyqxmd.com/read/29133837/contrasting-runoff-trends-between-dry-and-wet-parts-of-eastern-tibetan-plateau
#9
Yuanyuan Wang, Yongqiang Zhang, Francis H S Chiew, Tim R McVicar, Lu Zhang, Hongxia Li, Guanghua Qin
As the "Asian Water Tower", the Tibetan Plateau (TP) provides water resources for more than 1.4 billion people, but suffers from climatic and environmental changes, followed by the changes in water balance components. We used state-of-the-art satellite-based products to estimate spatial and temporal variations and trends in annual precipitation, evapotranspiration and total water storage change across eastern TP, which were then used to reconstruct an annual runoff variability series for 2003-2014. The basin-scale reconstructed streamflow variability matched well with gauge observations for five large rivers...
November 13, 2017: Scientific Reports
https://www.readbyqxmd.com/read/29131606/first-chemical-characterization-of-refractory-black-carbon-aerosols-and-associated-coatings-over-the-tibetan-plateau-4730-m-a-s-l
#10
Junfeng Wang, Qi Zhang, Min-Dong Chen, Sonya Collier, Shan Zhou, Xinlei Ge, Jianzhong Xu, Jinsen Shi, Conghui Xie, Jianlin Hu, Shun Ge, Yele Sun, Hugh Coe
Refractory black carbon (rBC) aerosol is an important climate forcer, and its impacts are greatly influenced by the species associated with rBC cores. However, relevant knowledge is particularly lacking at the Tibetan Plateau (TP). Here we report, for the first time, highly time-resolved measurement results of rBC and its coating species in central TP (4730 m a.s.l), by using an Aerodyne soot particle aerosol mass spectrometer (SP-AMS), which selectively measured rBC-containing particles. We found that the rBC was overall thickly coated with an average mass ratio of coating to rBC (RBC) of ~7...
November 13, 2017: Environmental Science & Technology
https://www.readbyqxmd.com/read/29129520/f2-isoprostanes-can-mediate-bleomycin-induced-lung-fibrosis
#11
Beatrice Arezzini, Daniela Vecchio, Cinzia Signorini, Blerta Stringa, Concetta Gardi
F2-isoprostanes (F2-IsoPs) have been considered markers of oxidative stress in various pulmonary diseases, but little is known about their possible role in pulmonary fibrosis. In this study, we have investigated the potential key role of F2-IsoPs as markers and mediators of bleomycin (BLM)-induced pulmonary fibrosis in rats. During the in vivo study, plasma F2-IsoPs showed a peak at 7 days and remained elevated for the entire experimental period. Lung F2-IsoP content nearly tripled 7 days following the intratracheal instillation of BLM, and by 28 days, the value increased about fivefold compared to the controls...
November 9, 2017: Free Radical Biology & Medicine
https://www.readbyqxmd.com/read/29125204/molecular-barium-hydrido-complex-stabilized-by-a-super-bulky-hydrotris-pyrazolyl-borate-ligand
#12
Xianghui Shi, Cuiping Hou, Chulu Zhou, Yanyao Song, Jianhua Cheng
Hydrogenolysis of the scorpionate-supported barium alkyl complex (Tp^Ad,iPr)Ba[CH(SiMe3)2](THF) (Tp^Ad,iPr = hydrotris(3-adamantyl-5-isopropyl-pyrazolyl)borate) afforded the dinuclear barium hydrido complex [(Tp^Ad,iPr)Ba(µ-H)]2 (2), which was characterized by NMR spectroscopy and single crystal X-ray analysis. Exposure of 2 with 1 atm of CO resulted in a reductive coupling process to form the cis-ethendiolate dianion (3). Reaction of 2 with one equivalent of PhCC-CCPh gave barium 1,4-diphenyl-2-butyne-1,4-diyl complex {[(Tp^Ad,iPr)Ba]2(PhCH-CC-CHPh) (4)...
November 10, 2017: Angewandte Chemie
https://www.readbyqxmd.com/read/29124794/effect-of-home-bleaching-on-the-translucency-of-cad-cam-systems
#13
Muhammet Karci, Necla Demir
PURPOSE: To evaluate the effect of a home bleaching agent (Opalescence PF) on the translucency of CAD/CAM ceramic systems. MATERIALS AND METHODS: The 28 sintered ceramic specimens (IPS Empress CAD and IPS e.max CAD; 15 mm long, 10 mm wide, 1 mm thick) were divided into two subgroups as control and bleaching groups (n = 7). Carbamide peroxide (CP), 16%, home bleaching agent was applied onto the surface of each specimen for 6 hours per day for 7 days. A spectrophotometer (VITA Easyshade Advance) was used to measure the CIE L(*) a(*) b(*) coordinates and the reflectance value (Y) of the specimens on white and black backgrounds...
November 10, 2017: Journal of Prosthodontics: Official Journal of the American College of Prosthodontists
https://www.readbyqxmd.com/read/29124634/analysis-of-factors-controlling-soil-phosphorus-loss-with-surface-runoff-in-huihe-national-nature-reserve-by-principal-component-and-path-analysis-methods
#14
Jing He, Derong Su, Shihai Lv, Zhaoyan Diao, He Bu, Qiang Wo
Phosphorus (P) loss with surface runoff accounts for the P input to and acceleration of eutrophication of the freshwater. Many studies have focused on factors affecting P loss with surface runoff from soils, but rarely on the relationship among these factors. In the present study, rainfall simulation on P loss with surface runoff was conducted in Huihe National Nature Reserve, in Hulunbeier grassland, China, and the relationships between P loss with surface runoff, soil properties, and rainfall conditions were examined...
November 9, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/29123992/prevalence-of-oral-tori-and-exostosis-in-malaysian-population-a-cross-sectional-study
#15
Ashish Kumar Singh, Srinivas Sulugodu Ramachandra, Shelly Arora, Daniel Devaprakash Dicksit, C G Kalyan, Priyanshi Singh
Introduction: Oral tori and exostosis are non-pathological bony protuberances seen on the alveolar surfaces of the jaw bones. These are commonly seen on the palatal surfaces of the maxilla [torus palatinus (TP)] and around the premolars in the lingual surface of the mandible [torus mandibularis (TM)]. The aim of this cross-sectional study was to determine the prevalence of tori/exostosis in the Malaysian population. Methodology: A total of 2666 patients were examined for the presence of tori and exostosis in the maxilla and mandible and were categorized into TP, TM, and exostosis (facial/labial)...
September 2017: Journal of Oral Biology and Craniofacial Research
https://www.readbyqxmd.com/read/29121758/tpeak-tend-dispersion-as-a-predictor-for-malignant-arrhythmia-events-in-patients-with-vasospastic-angina
#16
Wang Xianpei, Wu Sha, Gao Chuanyu, Yan Juanjuan, Chen Chong, Shi Yongen, Feng Yu, Lin Zhenhao
BACKGROUND: Tpeak-Tend interval (Tp-e interval) in electrocardiogram (ECG) has been reported to predict malignant arrhythmia events (MAE) in ST-segment elevation myocardial infarction and ion channelopathy. Tp-e interval and other ECG parameters as predictors for MAE was evaluated in patients with vasospastic angina (VA). METHODS AND RESULTS: Sixty-two patients with VA (Non-MAE group) and 20 patients with VA complicated by MAE (MAE group) were enrolled in our Division of Cardiology between January 2010 and December 2015...
December 15, 2017: International Journal of Cardiology
https://www.readbyqxmd.com/read/29120853/ultrastructural-characteristics-of-the-respective-forms-of-hepatic-stellate-cells-in-chronic-hepatitis-b-as-an-example-of-high-fibroblastic-cell-plasticity-the-first-assessment-in-children
#17
Joanna Maria Lotowska, Maria Elzbieta Sobaniec-Lotowska, Dariusz Marek Lebensztejn
PURPOSE: Activation of hepatic stellate cells (HSCs), mainly responsible for extracellular matrix synthesis, is assumed to be central event in the process of liver fibrogenesis. The major objective of the research was to analyze the ultrastructural profile of activated HSCs in children with chronic hepatitis B (chB), with respect to fibrosis intensity. MATERIALS/METHODS: Ultrastructural investigations of HSCs were conducted on liver bioptates from 70 children with clinicopathologically diagnosed chB before antiviral treatment...
November 6, 2017: Advances in Medical Sciences
https://www.readbyqxmd.com/read/29116167/no-evidence-of-widespread-decline-of-snow-cover-on-the-tibetan-plateau-over-2000-2015
#18
Xiaoyue Wang, Chaoyang Wu, Huanjiong Wang, Alemu Gonsamo, Zhengjia Liu
Understanding the changes in snow cover is essential for biological and hydrological processes in the Tibetan Plateau (TP) and its surrounding areas. However, the changes in snow cover phenology over the TP have not been well documented. Using Moderate Resolution Imaging Spectroradiometer (MODIS) daily snow products and the Interactive Multi-sensor Snow and Ice Mapping System (IMS) data, we reported daily cloud-free snow cover product over the Tibetan Plateau (TP) for 2000-2015. Snow cover start (SCS), melt (SCM) and duration (SCD) dates were calculated for each hydrological year, and their spatial and temporal variations were analyzed with elevation variations...
November 7, 2017: Scientific Reports
https://www.readbyqxmd.com/read/29115625/protective-effects-of-silymarin-on-triptolide-induced-acute-hepatotoxicity-in-rats
#19
Lan Wang, Qiong-Hui Huang, Yong-Xian Li, Yan-Feng Huang, Jian-Hui Xie, Lie-Qiang Xu, Yao-Xing Dou, Zi-Ren Su, Hui-Fang Zeng, Jian-Nan Chen
Silymarin has been used in the treatment of a number of liver diseases for a long time, but its efficacy in preventing triptolide induced acute hepatotoxicity has not been reported previously. The present study aimed to assess the protective effect of silymarin against triptolide (TP)-induced hepatotoxicity in rats. Rats were orally administrated with silymarin (50, 100 and 200 mg/kg) for 7 days and received intraperitoneal TP (2 mg/kg) on the day 8. Hepatic injuries were comprehensively evaluated in terms of serum parameters, morphological changes, oxidative damage, inflammation and apoptosis...
November 3, 2017: Molecular Medicine Reports
https://www.readbyqxmd.com/read/29114271/organized-chronic-subdural-hematomas-treated-by-large-craniotomy-with-extended-membranectomy-as-the-initial-treatment
#20
Mustafa Balevi
Objective: The aim of this retrospective study is to evaluate the efficacy and incidence of complications of craniotomy and membranectomy in elderly patients for the treatment of organized chronic subdural hematoma (OCSH). Materials and Methods: We retrospectively reviewed a series of 28 consecutive patients suffering from OCSH, diagnosed by magnetic resonance imaging (MRI) or computer tomography (CT) to establish the degree of organization and determine the intrahematomal architecture including inner membrane ossification...
October 2017: Asian Journal of Neurosurgery
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