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https://www.readbyqxmd.com/read/28689911/effect-of-grinding-and-polishing-on-roughness-and-strength-of-zirconia
#1
Waad Khayat, Najla Chebib, Matthew Finkelman, Samer Khayat, Ala Ali
STATEMENT OF PROBLEM: The clinical applications of high-translucency monolithic zirconia restorations have increased. Chairside and laboratory adjustments of these restorations are inevitable, which may lead to increased roughness and reduced strength. The influence of grinding and polishing on high-translucency zirconia has not been investigated. PURPOSE: The purpose of this in vitro study was to compare the roughness averages (Ra) of ground and polished zirconia and investigate whether roughness influenced strength after aging...
July 7, 2017: Journal of Prosthetic Dentistry
https://www.readbyqxmd.com/read/28648081/in-silico-and-in-vitro-screening-for-p-glycoprotein-interaction-with-tenofovir-darunavir-and-dapivirine-an-anti-retroviral-drug-combination-for-topical-prevention-of-colorectal-hiv-transmission
#2
Magda Swedrowska, Shirin Jamshidi, Abhinav Kumar, Charles Kelly, K Miraz Rahman, Ben Forbes
The aim of the study was to use in-silico and in vitro techniques to evaluate whether a triple formulation of antiretroviral drugs (tenofovir, darunavir and dapivirine) interacted with p-glycoprotein (P-gp) or exhibited any other permeability-altering drug-drug interactions in the colorectal mucosa. Potential drug interactions with P-gp were screened initially using molecular docking, followed by molecular dynamics simulations to analyse the identified drug-transporter interaction more mechanistically. The transport of tenofovir, darunavir and dapivirine was investigated in the Caco-2 cells models and colorectal tissue and their apparent permeability coefficient (Papp), efflux ratio (ER) and the effect of transporter inhibitors were evaluated...
June 25, 2017: Molecular Pharmaceutics
https://www.readbyqxmd.com/read/28596651/bacteremia-during-early-post-allogeneic-hematopoietic-stem-cell-transplantation-period-a-single-center-experience
#3
Amro Mohamed Sedky El-Ghammaz
Bacteremia is a significant complication of allogeneic hematopoietic stem cell transplantation (HSCT). We aimed to study bacteremia occurring during early post-transplant period at Bone Marrow Transplantation Unit of Ain Shams University regarding its risk factors and impact on survival. Patients performing allogeneic HSCT were followed up for occurrence of bacteremia. Survival status was assessed at 180 days post-transplant. Bacteremia occurred in 53.3 % of patients. On univariate analysis, CD34 +ve cell dose (P = 0...
June 2017: Indian Journal of Hematology & Blood Transfusion
https://www.readbyqxmd.com/read/28561378/epidemiology-of-bloodstream-infections-after-myeloablative-and-non-myeloablative-allogeneic-hematopoietic-stem-cell-transplantation-a-single-center-cohort-study
#4
Lars I Gjaerde, Claus Moser, Henrik Sengeløv
BACKGROUND: Patients who undergo allogeneic hematopoietic stem cell transplantation (allo-HSCT) often develop bloodstream infections (BSI). We aimed to describe the etiologies and antibiotic resistance patterns of BSI after allo-HSCT, and, as knowledge about the impact of conditioning regimen is limited, we looked at the incidence, timing, risk factors, and mortality of BSI separately for myeloablative (MA)- and non-myeloablative (NMA)-conditioned patients. METHODS: All 460 patients (207 MA- and 253 NMA-conditioned) who underwent their first allo-HSCT at our center from 2008 to 2013 were included in a historical cohort...
May 31, 2017: Transplant Infectious Disease: An Official Journal of the Transplantation Society
https://www.readbyqxmd.com/read/28552335/effect-of-air-blowing-duration-on-the-bond-strength-of-current-one-step-adhesives-to-dentin
#5
Jiale Fu, Pipop Saikaew, Shimpei Kawano, Ricardo M Carvalho, Matthias Hannig, Hidehiko Sano, Denis Selimovic
OBJECTIVES: To evaluate the influence of different air-blowing durations on the micro-tensile bond strength (μTBS) of five current one-step adhesive systems to dentin. METHODS: One hundred and five caries-free human molars and five current one-step adhesive systems were used: ABU (All Bond Universal, Bisco, Inc.), CUB (CLEARFIL™ Universal Bond, Kuraray), GPB (G-Premio BOND, GC), OBA (OptiBond All-in-one, Kerr) and SBU (Scotchbond Universal, 3M ESPE). The adhesives were applied to 600 SiC paper-flat dentin surfaces according to each manufacturer's instructions and were air-dried with standard, oil-free air pressure of 0...
August 2017: Dental Materials: Official Publication of the Academy of Dental Materials
https://www.readbyqxmd.com/read/28526864/a-broad-spectrum-bactericidal-lipopeptide-with-anti-biofilm-properties
#6
Ohad Meir, Fadia Zaknoon, Uri Cogan, Amram Mor
Previous studies of the oligoacyllysyl (OAK) series acyl-lysyl-lysyl-aminoacyl-lysine-amide, suggested their utility towards generating robust linear lipopeptide-like alternatives to antibiotics, although to date, none exhibited potent broad-spectrum bactericidal activity. To follow up on this premise, we produced a new analog (C14KKc12K) and investigated its properties in various media. Mechanistic studies suggest that C14KKc12K uses a non-specific membrane-disruptive mode of action for rapidly reducing viability of Gram-negative bacteria (GNB) similarly to polymyxin B (PMB), a cyclic lipopeptide used as last resort antibiotic...
May 19, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28510691/nf-%C3%AE%C2%BAb-upregulation-through-epigenetic-silencing-of-ldoc1-drives-tumor-biology-and-specific-immunophenotype-in-group-a-ependymoma
#7
Andrea M Griesinger, Davis A Witt, Sydney T Grob, Sabrina R Georgio Westover, Andrew M Donson, Bridget Sanford, Jean M Mulcahy Levy, Randall Wong, Daniel C Moreira, John A DeSisto, Ilango Balakrishnan, Lindsey M Hoffman, Michael H Handler, Kenneth L Jones, Rajeev Vibhakar, Sujatha Venkataraman, Nicholas K Foreman
Background.: Inflammation has been identified as a hallmark of high-risk Group A (GpA) ependymoma (EPN). Chronic interleukin (IL)-6 secretion from GpA tumors drives an immune suppressive phenotype by polarizing infiltrating monocytes. This study determines the mechanism by which IL-6 is dysregulated in GpA EPN. Methods.: Twenty pediatric GpA and 21 pediatric Group B (GpB) EPN had gene set enrichment analysis for MSigDB Hallmark gene sets performed. Protein and RNA from patients and cell lines were used to validate transcriptomic findings...
May 16, 2017: Neuro-oncology
https://www.readbyqxmd.com/read/28285886/one-year-record-of-bioaerosols-and-particles-concentration-in-indo-gangetic-plain-implications-of-biomass-burning-emissions-to-high-level-of-endotoxin-exposure
#8
Prashant Rajput, Manzar Hussain Anjum, Tarun Gupta
Previous studies worldwide have suggested the potential role of bioaerosols as ice-nuclei and cloud-condensation nuclei. Furthermore, their participation in regulating the global carbon cycle urges systematic studies from different environmental conditions throughout the globe. Towards this through one-year study, conducted from June 2015-May 2016, we report on atmospheric abundance and variability of viable bioaerosols, organic carbon (OC) and particles number and deduced mass concentrations from Indo-Gangetic Plain (IGP; at Kanpur)...
March 9, 2017: Environmental Pollution
https://www.readbyqxmd.com/read/28024381/enabling-prussian-blue-with-tunable-localized-surface-plasmon-resonances-simultaneously-enhanced-dual-mode-imaging-and-tumor-photothermal-therapy
#9
Xiaojun Cai, Wei Gao, Linlin Zhang, Ming Ma, Tianzhi Liu, Wenxian Du, Yuanyi Zheng, Hangrong Chen, Jianlin Shi
Prussian blue (PB) has been used as a photothermal conversion agent to generate heat to induce localized damage to tumor. However, its therapeutic efficiency is far from satisfactory. One of the major obstacles is that the maximum NIR absorption peak of PB within 690-720 nm cannot be optimized near the wavelength of the laser to enhance its therapeutic efficiency. Herein, we report that the integration of Gd(3+) into PB nanocrystals (GPB NCs) enables PB with tunable localized surface plasmon resonances (LSPRs) from 710 to 910 nm, achieving the maximum NIR peak near the wavelength of the laser...
December 27, 2016: ACS Nano
https://www.readbyqxmd.com/read/27979420/procalcitonin-levels-in-bloodstream-infections-caused-by-different-sources-and-species-of-bacteria
#10
Sheng Tao Yan, Li Chao Sun, Hong Bing Jia, Wen Gao, Jian Ping Yang, Guo Qiang Zhang
OBJECTIVE: The aim of this study was to evaluate procalcitonin (PCT) diagnostic accuracy in discriminating gram-negative (GN) from gram-positive (GP) bloodstream infections and determining the relationship between PCT levels, infection sites, and pathogen types. METHODS: Clinical and laboratory data were collected from patients with blood culture (BC)-positive sepsis between January 2014 and December 2015. PCT levels at different infection sites were compared, as was the presence of GN and GP bloodstream infection...
April 2017: American Journal of Emergency Medicine
https://www.readbyqxmd.com/read/27785765/long-term-effects-of-good-handling-practices-during-the-pre-weaning-period-of-crossbred-dairy-heifer-calves
#11
Luciana Pontes Silva, Aline Cristina Sant'Anna, Lívia Carolina Magalhães Silva, Mateus José Rodrigues Paranhos da Costa
The aim of this study was to determine whether applying good practices of handling during the pre-weaning period have long-term effects on behavioral and physiological indicators, health status, and average daily gain (ADG) of crossbred Bos taurus × Bos indicus heifer calves. During the pre-weaning period, 98 crossbred of Holstein × Gir heifer calves were allotted into three treatments: (1) good practices of handling + brushing (GPB; n = 25), (2) good practices of handling (GP; n = 25), and (3) control (n = 48)...
January 2017: Tropical Animal Health and Production
https://www.readbyqxmd.com/read/27718270/the-impact-of-surface-area-volume-curvature-and-lennard-jones-potential-to-solvation-modeling
#12
Duc D Nguyen, Guo-Wei Wei
This article explores the impact of surface area, volume, curvature, and Lennard-Jones (LJ) potential on solvation free energy predictions. Rigidity surfaces are utilized to generate robust analytical expressions for maximum, minimum, mean, and Gaussian curvatures of solvent-solute interfaces, and define a generalized Poisson-Boltzmann (GPB) equation with a smooth dielectric profile. Extensive correlation analysis is performed to examine the linear dependence of surface area, surface enclosed volume, maximum curvature, minimum curvature, mean curvature, and Gaussian curvature for solvation modeling...
January 5, 2017: Journal of Computational Chemistry
https://www.readbyqxmd.com/read/27607182/idiopathic-granulomatous-mastitis-cytologic-and-histologic-study-of-65-egyptian-patients
#13
COMPARATIVE STUDY
Thanaa El A Helal, Lobna S Shash, Somaia A Saad El-Din, Sally M Saber
BACKGROUND: The etiology of idiopathic granulomatous mastitis (IGM) is unknown, and it is commonly misdiagnosed clinically and/or radiologically as breast cancer. The role of fine-needle aspiration cytology (FNAC) in its diagnosis is still a matter of debate. The aim of the current study is to assess the value of FNAC in the diagnosis of IGM, and to search for the presence of bacteria in IGM with cystic vacuoles, which was described recently by a few authors. MATERIALS AND METHODS: Retrospective study of cytologic smears and histologic tissue sections of 65 Egyptian IGM cases was done along with microbiologic testing...
2016: Acta Cytologica
https://www.readbyqxmd.com/read/27522507/synthetic-enzyme-kinetic-and-protein-crystallographic-studies-of-c-%C3%AE-d-glucopyranosyl-pyrroles-and-imidazoles-reveal-and-explain-low-nanomolar-inhibition-of-human-liver-glycogen-phosphorylase
#14
Anastassia L Kantsadi, Éva Bokor, Sándor Kun, George A Stravodimos, Demetra S M Chatzileontiadou, Demetres D Leonidas, Éva Juhász-Tóth, Andrea Szakács, Gyula Batta, Tibor Docsa, Pál Gergely, László Somsák
C-β-d-Glucopyranosyl pyrrole derivatives were prepared in the reactions of pyrrole, 2-, and 3-aryl-pyrroles with O-peracetylated β-d-glucopyranosyl trichloroacetimidate, while 2-(β-d-glucopyranosyl) indole was obtained by a cross coupling of O-perbenzylated β-d-glucopyranosyl acetylene with N-tosyl-2-iodoaniline followed by spontaneous ring closure. An improved synthesis of O-perbenzoylated 2-(β-d-glucopyranosyl) imidazoles was achieved by reacting C-glucopyranosyl formimidates with α-aminoketones. The deprotected compounds were assayed with isoforms of glycogen phosphorylase (GP) to show no activity of the pyrroles against rabbit muscle GPb...
November 10, 2016: European Journal of Medicinal Chemistry
https://www.readbyqxmd.com/read/27096939/antimicrobial-activities-of-nisin-tea-polyphenols-and-chitosan-and-their-combinations-in-chilled-mutton
#15
Li He, Likou Zou, Qianru Yang, Jinghua Xia, Kang Zhou, Yuanting Zhu, Xinfeng Han, Biao Pu, Bin Hu, Wenwen Deng, Shuliang Liu
Antimicrobial activities of nisin, tea polyphenols (TPs), and chitosan, and their combinations were evaluated against both Gram-positive bacteria (GPB) and Gram-negative bacteria (GNB) by the agar dilution method. Results showed that the MIC of nisin was 2.44 to 1250 mg/L for GPB and reached 5000 mg/L for GNB. The MICs of TPs and chitosan were 313 to 625 mg/L and 469 mg/L for GNB, and 156 to 5000 mg/L and 234 to 938 mg/L for GPB, respectively. These results indicated that TPs and chitosan exhibited inhibitory effects against both GPB and GNB, whereas nisin inhibited the growth of GPB only...
June 2016: Journal of Food Science
https://www.readbyqxmd.com/read/27095454/diversity-of-indigenous-endophytic-bacteria-associated-with-the-roots-of-chinese-cabbage-brassica-campestris-l-cultivars-and-their-antagonism-towards-pathogens
#16
Md Azizul Haque, Han Dae Yun, Kye Man Cho
The study aimed to reveal the diversity of endophytic bacteria in the roots of Chinese cabbage (CC) cultivated in two areas in Korea, namely, Seosang-gun (SS) and Haenam-gun (HN), and also in a transgenic plant (TP) from the laboratory. A total of 653 colonies were isolated from the interior of CC roots, comprising 118, 302, and 233 isolates from SS, HN, and TP samples, respectively. Based on 16S rRNA gene sequence analysis, the isolates belonged to four major phylogenetic groups: high-G+C Gram-positive bacteria (HGC-GPB), low-G+C Gram-positive bacteria (LGC-GPB), Proteobacteria, and Bacteriodetes...
May 2016: Journal of Microbiology / the Microbiological Society of Korea
https://www.readbyqxmd.com/read/27079312/compound-heterozygosity-of-two-novel-rhag-alleles-leads-to-a-considerable-disruption-of-the-rh-complex
#17
Helene Polin, Monika Pelc-Klopotowska, Martin Danzer, Susanne Suessner, Christian Gabriel, Julia Wilflingseder, Alicja Żmudzin, Agnieszka Orzińska, Katarzyna Guz, Bogumila Michalewska, Ewa Brojer
BACKGROUND: The Rhesus (Rh) complex consists of a core comprising the Rh proteins (RhD/RhCE) and the Rh-associated glycoprotein (RhAG) with accessory chains (GPB, LW, CD47). Molecular defects of the RHAG gene may cause a regulator Rhnull phenotype without Rh antigen expression or a Rhmod phenotype with decreased Rh antigen expression. STUDY DESIGN AND METHODS: Blood samples of a donor with strongly diminished Rh antigens and five family members were analyzed by serological phenotyping, flow cytometry, molecular testing, and gene expression analysis of Rh complex candidate genes...
April 2016: Transfusion
https://www.readbyqxmd.com/read/27014577/protein-and-calorie-intakes-in-adult-and-pediatric-subjects-with-urea-cycle-disorders-participating-in-clinical-trials-of-glycerol-phenylbutyrate
#18
Debra Hook, George A Diaz, Brendan Lee, James Bartley, Nicola Longo, William Berquist, Cynthia Le Mons, Ingrid Rudolph-Angelich, Marty Porter, Bruce F Scharschmidt, Masoud Mokhtarani
BACKGROUND: Little prospectively collected data are available comparing the dietary intake of urea cycle disorder (UCD) patients to UCD treatment guidelines or to healthy individuals. OBJECTIVE: To examine the protein and calorie intakes of UCD subjects who participated in clinical trials of glycerol phenylbutyrate (GPB) and compare these data to published UCD dietary guidelines and nutritional surveys. DESIGN: Dietary data were recorded for 45 adult and 49 pediatric UCD subjects in metabolic control during participation in clinical trials of GPB...
March 2016: Molecular Genetics and Metabolism Reports
https://www.readbyqxmd.com/read/26937403/refeeding-syndrome-in-a-young-woman-with-argininosuccinate-lyase-deficiency
#19
M Stuy, G-F Chen, J M Masonek, B F Scharschmidt
A severely chronically protein and calorie restricted young woman with argininosuccinate lyase deficiency developed transient refeeding syndrome (RFS) and hyperammonemia after modest diet liberalization following initiation of glycerol phenylbutyrate (GPB). The patient required IV supportive care and supplementation with potassium, magnesium and calcium. She is now doing well on GPB and an appropriate maintenance diet. Susceptibility to RFS should be considered in chronically nutritionally restricted patients with metabolic disorders after liberalization of diet...
September 2015: Molecular Genetics and Metabolism Reports
https://www.readbyqxmd.com/read/26888348/age-dependent-changes-in-pb-concentration-in-human-teeth
#20
Agnieszka Fischer, Danuta Wiechuła
The result of exposure to Pb is its accumulation in mineralized tissues. In human body, they constitute a reservoir of approx. 90 % of the Pb reserve. The conducted research aimed at determining the accumulation of Pb in calcified tissues of permanent teeth. The concentration of Pb in 390 samples of teeth taken from a selected group of Polish people was determined using the AAS method. Average concentration of Pb in teeth amounted to 14.3 ± 8.18 μg/g, range of changes: 2.21-54.8 μgPb/g. Accumulation of Pb in human body was determined based on changes in Pb concentration in teeth of subjects aged 13-84 years...
September 2016: Biological Trace Element Research
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