Effect of oxygen and hydrogen on microstructure of pyrolytic carbon deposited from thermal decomposition of methane and ethanol

Publication date: Available online 7 February 2018 Source:Journal of Solid State Chemistry Author(s): Biyun Ren, Shouyang Zhang, LiQun He, Shengyue Gu Chemical vapor infiltration (CVI) is the most extensive industrial preparation of carbon/carbon (C/C) composites. Precursor affects the CVI process considerably. In the present study, using carbon fiber bundles as preforms, methane and ethanol as precursors, the C/C composites were densified by decomposition of various gases in CVI. The thickness and texture of deposited pyrolytic carbon (PyC) were characterized by polarized light microscopy (PLM). The microstructure of PyC was analyzed by Raman spectroscopy. The morphologies of PyC were characterized by scanning electron microscopy (SEM). The composition of PyC was detected by X-ray photoelectron spectroscopy (XPS). Adding hydrogen in methane precursor resulted in a sharp decrease in the deposition rate and texture of PyC. Mixture of methane and ethanol as the precursor improved the deposition rate and texture remarkably. Besides, O element in ethanol was not remained as a constitution of PyC, and it was removed before the formation of PyC. Graphical abstract
Source: Journal of Solid State Chemistry - Category: Chemistry Source Type: research

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Publication date: Available online 17 December 2018Source: Materials Chemistry and PhysicsAuthor(s): S.M. Patil, S.P. Deshmukh, K.V. More, V.B. Shevale, S.B. Mullani, A.G. Dhodamani, S.D. DelekarAbstractTiO2/WO3 nanocomposites (NCs) were successfully prepared by ultrasonic-assisted sol-gel method and acid functionalized (sulfated) by using chlorosulfonic acid. Various physicochemical properties of as prepared NCs were studied by using X-ray diffraction spectroscopy, Fourier transform infrared spectroscopy, field emission scanning electron microscopy with energy dispersive analysis, transmission electron microscopy, X-ray p...
Source: Materials Chemistry and Physics - Category: Materials Science Source Type: research
Low-sodium diets are widely urged on people who have a variety of ailments, but there ’ s little proof they help those with heart failure.
Source: NYT Health - Category: Consumer Health News Authors: Tags: Diet and Nutrition Salt Heart Medicine and Health Blood Pressure Source Type: news
In this study, we assessed the efficacy of EphA3 antibody drug conjugate (ADC) and radioimmunotherapy (RIT) approaches using orthotopic animal xenograft models. Brain uptake studies, using positron emission tomography/computed tomography (PET/CT) imaging, show EphA3 antibodies are effectively delivered across the blood-tumour barrier and accumulate at the tumour site with no observed normal brain reactivity. A robust anti-tumour response, with no toxicity, was observed using EphA3, ADC, and RIT approaches, leading to a significant increase in overall survival. Our current research provides evidence that GBM patients may be...
Source: Cancers - Category: Cancer & Oncology Authors: Tags: Article Source Type: research
ConclusionsCutaneous tuberculosis should be considered in a child presenting with a skin lesion or discharge. Cutaneous tuberculosis cases should be investigated for coexisting pulmonary and extrapulmonary forms of tuberculosis. Histopathologic diagnosis should be considered to rule out other skin pathologies and also to prevent delay in treatment. Better tuberculosis prevention strategies, including vaccination scale-up, are warranted.
Source: Journal of Medical Case Reports - Category: General Medicine Source Type: research
In this study, the insoluble dietary fiber (IDF) and soluble dietary fiber (SDF) were obtained by enzymatic hydrolysis and lyophilization of wheat bran (Triticum aestivum L.). The physicochemical properties were to evaluated by laser diffraction, scanning electron microscopy, Fourier-transform infrared spectroscopy and X-ray diffraction. The results showed that the IDF was good at absorbing peanut oil (5.86 g/g), lard (9.63 g/g), cholesterol (4.11 mg/g in small intestine and 2.87 mg/g in stomach), sodium cholate (3.19 mg/g) and nitrite (100% at 105 min), while the SDF showed impressive DPPH, A...
Source: LWT Food Science and Technology - Category: Food Science Source Type: research
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Source: the Mail online | Health - Category: Consumer Health News Source Type: news
Publication date: Available online 15 December 2018Source: Biochimica et Biophysica Acta (BBA) - BiomembranesAuthor(s): Takashi Ohgita, Yuki Takechi-Haraya, Ryo Nadai, Mana Kotani, Yuki Tamura, Karin Nishikiori, Kazuchika Nishitsuji, Kenji Uchimura, Koki Hasegawa, Kumiko Sakai-Kato, Kenichi Akaji, Hiroyuki SaitoAbstractIn the direct cell membrane penetration, arginine-rich cell-penetrating peptides are thought to penetrate into cells across the hydrophobic lipid membranes. To investigate the effect of the amphipathic property of arginine-rich peptide on the cell-penetrating ability, we designed a novel amphipathic cell-pen...
Source: Biochimica et Biophysica Acta (BBA) Biomembranes - Category: Biochemistry Source Type: research
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Source: Polymer Degradation and Stability - Category: Chemistry Source Type: research
In this study, the characteristic of the biofilm produced on vascular and urological catheters was determined using a confocal microscopy for the most frequently involved in infections diphtheroid species. They were represented by the reference strains of Corynebacterium striatum ATCC 6940 and C. amycolatum ATCC 700207. The effect of ciprofloxacin on the biofilm produced by the antibiotic-susceptible C. striatum strain was evaluated using three concentrations of the antimicrobial agent (2 ×, 4 ×, and 6 × the MIC - the Minimum Inhibitory Concentration). The basis for the interpretation of results was the s...
Source: Polish Journal of Microbiology - Category: Microbiology Tags: Pol J Microbiol Source Type: research
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Source: Materials Science and Engineering: C - Category: Materials Science Source Type: research
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