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https://www.readbyqxmd.com/read/28534397/shallow-heavily-doped-n-germanium-by-organo-antimony-monolayer-doping
#1
Thibault Alphazan, Adrian Diaz Alvarez, Francois Martin, Helen Grampeix, Virginie Enyedi, Eugenie Martinez, Névine Rochat, Marc Veillerot, Marc Dewitte, Jean-Philippe Nys, Maxime Berthe, Didier Stiévenard, Chloé Thieuleux, Bruno Grandidier
Functionalization of Ge surfaces with the aim of incorporating specific dopant atoms to form high quality junctions is of particular importance for the future generation of solid state devices. We report the shallow doping of Ge wafers with a monolayer doping strategy that is based on the controlled grafting of Sb-precursors and the subsequent diffusion of Sb into the wafer upon annealing. We highlight the key role of citric acid to passivate the surface prior to its reaction with the Sb-precursors and the benefit of a protective SiO2 overlayer that enables the efficient incorporation of Sb dopants with a concentration higher than 1020 cm-3...
May 23, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28534058/freezability-of-water-buffalo-spermatozoa-is-improved-with-the-addition-of-catalase-in-cryodiluent
#2
L Ali, S M Hassan Andrabi, H Ahmed, A A Hussain Shah
BACKGROUND: Catalase enzyme is usually distributed in mammalian seminal plasma, where it decomposes hydrogen peroxide into water and oxygen and enhances sperm survivability. OBJECTIVE: To evaluate the effect of catalase (0, 100, 200 or 300 IU/ml) added in tris-citric acid (TCA) based extender on motion characteristics, viability and DNA integrity of bubaline spermatozoa at post dilution (PD) and post thawing (PT) stages of cryopreservation. MATERIALS AND METHODS: Collection of semen was done in four Nili-Ravi bulls with an artificial vagina (42 degree C)...
March 2017: Cryo Letters
https://www.readbyqxmd.com/read/28532067/development-of-biocompatible-and-safe-polyethersulfone-hemodialysis-membrane-incorporated-with-functionalized-multi-walled-carbon-nanotubes
#3
Muhammad Nidzhom Zainol Abidin, Pei Sean Goh, Ahmad Fauzi Ismail, Mohd Hafiz Dzarfan Othman, Hasrinah Hasbullah, Noresah Said, Siti Hamimah Sheikh Abdul Kadir, Fatmawati Kamal, Mohd Sohaimi Abdullah, Be Cheer Ng
A novel approach in the design of a safe, high performance hemodialysis membrane is of great demand. Despite many advantages, the employment of prodigious nanomaterials in hemodialysis membrane is often restricted by their potential threat to health. Hence, this work focusses on designing a biocompatible polyethersulfone (PES) hemodialysis membrane embedded with poly (citric acid)-grafted-multi walled carbon nanotubes (PCA-g-MWCNTs). Two important elements which could assure the safety of the nanocomposite membrane, i...
August 1, 2017: Materials Science & Engineering. C, Materials for Biological Applications
https://www.readbyqxmd.com/read/28531312/taste-elicited-activity-in-facial-muscle-regions-in-5-8-week-old-infants
#4
Jessica E Armstrong, David G Laing, Anthony L Jinks
The state of development of the sense of taste in humans during the first few months of life is only partially understood. Since taste plays a critical role in the feeding and nutrition of infants a better understanding of taste development during early life is required. Currently, information about the sense of taste in pre-verbal infants is obtained by analysis of videotaped facial expressions using the Baby FACS coding system. A potentially more objective faster procedure for assessing facial expressions not investigated in infants is electromyography (EMG)...
June 1, 2017: Chemical Senses
https://www.readbyqxmd.com/read/28529330/dietary-medium-chain-saturated-fatty-acids-induce-gene-expression-of-energy-metabolism-related-pathways-in-adipose-tissue-of-abdominally-obese-subjects
#5
J C Matualatupauw, M Bohl, S Gregersen, K Hermansen, L A Afman
BACKGROUND: Dietary medium-chain saturated fatty acids (MC-SFAs) have been shown to reduce total body fat. Previously, we showed that MC-SFAs prevent body fat accumulation, despite weight gain. Here, we aim to explore potential molecular mechanisms underlying the protective effect of MC-SFAs on body fat gain. METHODS: The DairyHealth study examined the long-term effects of milk protein and milk fat with a low or high content of MC-SFA. In this 12 week, randomized, double-blind, diet intervention study, participants consumed 60 g milk protein (whey or casein) and 63 g milk fat (high MC-SFA or low MC-SFA) daily in a 2 by 2 factorial design...
May 22, 2017: International Journal of Obesity: Journal of the International Association for the Study of Obesity
https://www.readbyqxmd.com/read/28527661/modulation-of-adipocyte-function-by-the-tgf-%C3%AE-family
#6
Yuhang Qiao, Shozo Tomonaga, Masashi Suenaga, Tohru Matsui, Masayuki Funaba
Members of the transforming growth factor-β (TGF-β) family are known to regulate the commitment of mesenchymal stem cells to an adipocyte lineage and the differentiation of preadipocytes to adipocytes. However, the roles of TGF-β family members in mature adipocytes are not known. The present study explored the modulation of cell function in 3T3-L1 adipocytes treated with the TGF-β family members TGF-β1, activin A, activin B, bone morphogenetic protein (BMP) 4, and BMP7. These TGF-β family members modulated the expression of some adipokines; activin A upregulated leptin expression, and activin B downregulated the expression of plasminogen activator inhibitor-1...
May 17, 2017: Cytokine
https://www.readbyqxmd.com/read/28526203/quantitative-evaluation-of-inhibitory-effect-of-various-substances-on-anaerobic-ammonia-oxidation-anammox
#7
Tomotaka Nakamura, Yuhki Harigaya, Yuya Kimura, Megumi Kuroiwa, Yuhri Kurata, Kazuichi Isaka, Yuichi Suwa
The inhibitory effect of 20 substances of various chemical species on the anaerobic ammonia oxidation (anammox) activity of an enrichment culture, predominated by Candidatus Brocadia, was determined systematically by using a (15)N tracer technique. The initial anammox rate was determined during first 25 min with a small-scale anaerobic batch incubation supplemented with possible inhibitors. Although Cu(2+) and Mn(2+) did not inhibit anammox, the remaining 18 substances [Ni(2+), Zn(2+), Co(2+), [Formula: see text] , Fe(2+), 4 amines, ethylenediaminetetraacetic acid (EDTA), ethylenediamine-N,N'-bis (2-hydroxyphenylacetic acid) (EDDHA), citric acid, nitrilotriacetic acid (NTA), N,N-dimethylacetamide (DMA), 1,4-dioxane, dimethyl sulfoxide (DMSO), N,N-dimethylformamide (DMF) and tetrahydrofuran (THF)] were inhibitory...
May 16, 2017: Journal of Bioscience and Bioengineering
https://www.readbyqxmd.com/read/28525713/identification-and-validation-of-sensory-active-compounds-from-data-driven-research-a-flavoromics-approach
#8
Ian Ronningen, Michelle Miller, Youlin Xia, Devin G Peterson
In the current study significant LC/MS features, from multivariate analysis (MVA) models developed using untargeted chemical fingerprinting to characterize flavor changes in extracts of citrus fruits related to aging, were further isolated and analyzed for sensory relevant information, followed by structural elucidation of flavor actives. The top ten statistical features from two MVA approaches, partial least squares data analysis (PLS-DA) and Random Forrest (RF), were purified to approximately 70% via multi-dimensional liquid chromatography-mass directed fractionation to screen for sensory activity...
May 19, 2017: Journal of Agricultural and Food Chemistry
https://www.readbyqxmd.com/read/28521310/the-impact-of-the-demineralized-organic-matrix-on-the-effect-of-tif4-varnish-on-the-progression-of-dentin-erosive-loss
#9
Beatriz Martines de Souza, Mariele Vertuan, Marília Afonso Rabelo Buzalaf, Ana Carolina Magalhães
This in vitro study compared the effect of TiF4 varnish with that of NaF varnish, applied on pre-eroded bovine dentin samples, with respect to the progression of erosive loss, in the presence or absence of the demineralized organic matrix (DOM). One hundred and sixty bovine dentin samples were pre-eroded (0.1% citric acid, pH 2.5, 30 min). Half of the samples were subjected to the DOM removal (collagenase solution, 5 days). Samples with and without the DOM were treated according to the groups (n = 20 with DOM and 20 without DOM/group): TiF4 varnish (2...
May 19, 2017: Caries Research
https://www.readbyqxmd.com/read/28520428/cyclic-diarylheptanoids-from-corylus-avellana-green-leafy-covers-determination-of-their-absolute-configurations-and-evaluation-of-their-antioxidant-and-antimicrobial-activities
#10
Antonietta Cerulli, Gianluigi Lauro, Milena Masullo, Vincenza Cantone, Beata Olas, Bogdan Kontek, Filomena Nazzaro, Giuseppe Bifulco, Sonia Piacente
The methanol extract of the leafy covers of Corylus avellana, source of the Italian PGI (protected geographical indication) product "Nocciola di Giffoni", afforded two new cyclic diarylheptanoids, giffonins T and U (2 and 3), along with two known cyclic diarylheptanoids, a quinic acid, flavonoid-, and citric acid derivatives. The structures of giffonins T and U were determined as highly hydroxylated cyclic diarylheptanoids by 1D and 2D NMR experiments. Their relative configurations were assigned by a combined quantum mechanical/NMR approach, comparing the experimental (13)C/(1)H NMR chemical shift data and the related predicted values...
May 18, 2017: Journal of Natural Products
https://www.readbyqxmd.com/read/28513789/effect-of-final-irrigation-protocols-on-microhardness-reduction-and-erosion-of-root-canal-dentin
#11
Flávia Emi Razera Baldasso, Luana Roleto, Vinicius Duval da Silva, Renata Dornelles Morgental, Patrícia Maria Poli Kopper
This study aimed to evaluate the effect of final irrigation protocols on microhardness reduction and erosion of root canal dentin. Sixty root canals from mandibular incisors were instrumented and randomly divided into six groups (n = 10) according to the irrigant used: QMiX, 17% EDTA, 10% citric acid (CA), 1% peracetic acid (PA), 2.5% NaOCl (solution control), and distilled water (negative control). The chelating solutions were used to irrigate the canal followed by 2.5% NaOCl as a final flush. After the irrigation protocols, all specimens were rinsed with 10 mL of distilled water to remove any residue of the chemical solutions...
May 15, 2017: Brazilian Oral Research
https://www.readbyqxmd.com/read/28513738/role-of-ni-in-hetero-architectured-nio-ni-composites-for-enhanced-catalytic-performance
#12
Sangeeta Adhikari, Giridhar Madras
A facile, one-step combustion synthesis in solution is reported for preparing hetero-architectured NiO/Ni nanocomposites using different organic fuels. The prepared nanocomposites were physicochemically characterized for crystal structure, functional groups, and morphology. It was found that the content of Ni in the nanocomposite varied due to different combustion fuels. A photocatalytic (PC) investigation of these nanocomposites was performed using rhodamine 6G (RG) under UV light. A citric acid combusted NiO/Ni (N-CA) composite containing 20% Ni phase showed the highest photoactivity in comparison to pure NiO due to its large porous channels and high surface area (∼28 ± 2 m(2) g(-1))...
May 17, 2017: Physical Chemistry Chemical Physics: PCCP
https://www.readbyqxmd.com/read/28512652/comparison-of-simplistic-biofilm-models-for-%C3%A2-evaluating-irrigating-solutions
#13
Maximilian Gänsbauer, Andreas Burkovski, Matthias Karl, Tanja Grobecker-Karl
OBJECTIVE: Many innovations have recently been implemented in the field of endodontics, often based on a variety of in-vitro/ex-vivo test setups. It was the goal of this research to compare different biofilm models for evaluating the effectiveness of rinsing solutions. METHOD AND MATERIALS: Three different models have been applied in this study, including petri dishes with nutrient medium, arrays of human dentin disks, and split bovine root segments. The susceptibility of biofilms formed by Enterococcus faecalis to commonly used endodontic irrigants was tested...
May 16, 2017: Quintessence International
https://www.readbyqxmd.com/read/28512283/unusual-root-canal-irrigation-solutions
#14
Zahed Mohammadi, Hamid Jafarzadeh, Sousan Shalavi, Jun-Ichiro Kinoshita
Microorganisms and their by-products play a critical role in pulp and periradicular pathosis. Therefore, one of the main purposes of root canal treatment is disinfection of the entire system of the canal. This aim may be obtained using mechanical preparation, chemical irrigation, and temporary medication of the canal. For this purpose, various irrigation solutions have been advocated. Common root canal irrigants, such as sodium hypochlorite, chlorhexidine, and a mixture of tetracycline, acid, and detergent have been extensively reviewed...
May 1, 2017: Journal of Contemporary Dental Practice
https://www.readbyqxmd.com/read/28512002/cell-surface-g-protein-coupled-receptors-for-tumor-associated-metabolites-a-direct-link-to-mitochondrial-dysfunction-in-cancer
#15
REVIEW
Bojana Ristic, Yangzom D Bhutia, Vadivel Ganapathy
Mitochondria are the sites of pyruvate oxidation, citric acid cycle, oxidative phosphorylation, ketogenesis, and fatty acid oxidation. Attenuation of mitochondrial function is one of the most significant changes that occurs in tumor cells, directly linked to oncogenesis, angiogenesis, Warburg effect, and epigenetics. In particular, three mitochondrial enzymes are inactivated in cancer: pyruvate dehydrogenase (PDH), succinate dehydrogenase (SDH), and 3-hydroxy-3-methylglutaryl CoA synthase-2 (HMGCS2). These enzymes are subject to regulation via acetylation/deacetylation...
May 13, 2017: Biochimica et Biophysica Acta
https://www.readbyqxmd.com/read/28510485/metabolomic-response-to-huanglongbing-role-of-carboxylic-compounds-in-citrus-sinensis-response-to-candidatus-liberibacter-asiaticus-and-its-vector-diaphorina-citri
#16
Nabil Killiny, Yasser Nehela
Huanglongbing, a destructive disease of citrus, is caused by the fastidious bacterium, Candidatus Liberibacter asiaticus (CLas), and transmitted by Asian citrus psyllid, Diaphorina citri. The impact of CLas-infection and/or D. citri-infestation on Valencia sweet orange (Citrus sinensis) leaf metabolites was investigated using GC-MS, followed by gene expression analysis for 37 genes involved in jasmonic acid (JA), salicylic acid (SA), and proline-glutamine pathways. The total amino acid abundance increased after CLas-infection, while the total fatty acids increased dramatically after infestation with D...
May 16, 2017: Molecular Plant-microbe Interactions: MPMI
https://www.readbyqxmd.com/read/28508835/beneficial-influence-of-ellagic-acid-on-biochemical-indexes-associated-with-experimentally-induced-colon-carcinogenesis
#17
Umesalma Syed, Sudhandiran Ganapasam
OBJECTIVE: To elucidate the key biochemical indexes associated with 1, 2-dimethylhydrazine (DMH)-induced colon carcinogenesis and the modulatory efficacy of a dietary polyphenol, ellagic acid (EA). MATERIALS AND METHODS: Wistar rats were chosen to study objective, and were divided into 4 groups; Group 1-control rats; Group 2-rats received EA (60 mg/kg body weight/day, orally); rats in Group 3-induced with DMH (20 mg/kg body weight) subcutaneously for 15 weeks; DMH-induced Group 4 rats were initiated with EA treatment...
January 2017: Journal of Cancer Research and Therapeutics
https://www.readbyqxmd.com/read/28508151/tunable-and-nontoxic-fluorescent-probes-based-on-carbon-dots-for-imaging-of-indole-propionic-acid-receptor-in-plant-tissues-in-situ
#18
Bixia Lin, Ying Yu, Fangfei Liu, Yujuan Cao, Manli Guo
Indole propionic acid (IPA) is one of the important plant growth hormones for promoting rooting and fruiting. Labeling IPA receptor in plant tissues is able to further track the signal transduction processes of IPA and uncover the function mechanism of IPA on crop productions. In this paper, a tunable and nontoxic fluorescent probe for IPA receptors was designed and synthetized base on carbon dots (C dots). Firstly carboxyl-modified carbon dots were prepared by high temperature cracking of citric acid. The fluorescence emission wavelengths of C dots varied with the excitation wavelengths change...
May 15, 2017: Journal of Fluorescence
https://www.readbyqxmd.com/read/28500516/nd-yag-laser-irradiation-associated-with-fluoridated-gels-containing-photo-absorbers-in-the-prevention-of-enamel-erosion
#19
Pereira Lgs, S H Joao-Souza, Sjc Bezerra, A B Borges, Acc Aranha, T Scaramucci
This study evaluated the combined effect of Nd:YAG laser irradiation and fluoridated gels containing photo absorbers against enamel erosion. Enamel specimens from bovine teeth were polished, eroded (10 min, with 1% citric acid, pH = 2.6), and randomly allocated into the experimental groups (n = 8), according to the different surface treatments: fluoridated gels (F: 9047 ppm F and F + Sn: 9047 ppm F and 3000 ppm Sn), with or without photo absorbers (E: erythrosine and MB: methylene blue), and associated or not with Nd:YAG laser irradiation (in contact; 0...
May 12, 2017: Lasers in Medical Science
https://www.readbyqxmd.com/read/28497482/quality-changes-and-shelf-life-extension-of-ready-to-eat-fish-patties-by-adding-encapsulated-citric-acid
#20
Ricard Bou, Anna Claret, Antonios Stamatakis, Brigitte Martínez, Luis Guerrero
BACKGROUND: Citric acid is commonly used as a flavoring and preservative in food and beverages. The effect of adding citric acid directly or encapsulated (each at 1 and 2 g kg(-1) ) on the quality and shelf-life of ready-to-eat sea bass patties was evaluated during their storage at 4 °C in vacuum skin packaging. RESULTS: Microbial growth and total basic volatile nitrogen were maintained at relatively low levels up to 8 weeks of storage. With respect to oxidative stability, the addition of encapsulated citric acid minimized secondary oxidation values more efficiently than its direct addition regardless of the concentration...
May 12, 2017: Journal of the Science of Food and Agriculture
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