نتایج جستجو برای: b4c bn
تعداد نتایج: 8878 فیلتر نتایج به سال:
The aim of the present study was to examine overweight bulimia nervosa (BN) in a community sample of women. Volunteers (n = 1964) completed self-report questionnaires of weight, binge eating, purging, and cognitive features. Participants were classified as overweight (body mass index ≥25) or normal weight (body mass index <25). Rates of BN within the overweight and normal-weight classes did not...
To evaluate the potential role of impaired renin-angiotensin system (RAS) function in contributing to reduced vascular relaxation in Dahl salt sensitive (S) rats, responses to acetylcholine (10-6 mol/L) and hypoxia (PO 2 reduction to 40-45 mm Hg), were determined in isolated middle cerebral arteries of Dahl S rats, Brown Norway (BN) rats, and consomic rats having chromosome 13 (containing the r...
Impaired regulation of renin in Dahl salt-sensitive rats (SS/JRHsdMcwi, SS) contributes to attenuated angiogenesis in this strain. This study examined angiogenic function and genomic structure of regions surrounding the renin gene using subcongenic strains of the SS and BN/NHsdMcwi (BN) rat to identify important genomic variations between SS and BN involved in angiogenesis. Three candidate regi...
Hybrid nanofluids aim to further improve the characteristics of mono nanofluids. However, experimental studies that jointly explore physical properties hybrids and corresponding are missing. In this work, B4C TiB2 hybrid TiB2:B4C nanoadditives used for first time design based on propylene glycol:water 20:80 wt%. The density, isobaric heat capacity, thermal conductivity determined by oscillating...
TiB2-SiC-C and TiB2-TiC-C heteromodulus ceramics were sintered by reactive hot pressing of TiC-B4C-Si TiC-B4C precursors at 1830 °C 30 MPa. Sintering time the maximum temperature was between 2 8 min. The reactions in green body create submicron (100–400 nm) TiB2 crystals inside silicon carbide grains as well BxSiyCz nanofibers, which nucleate near SiC surfaces. Low hardness graphite platelets a...
In this study, B4C / SiC nanocomposite powder with 1 to 1 molar ratio was synthesized completely in situ, with high purity and at low temperature by mechanical activation volume combustion synthesis method. At first, raw materials consist of B2O3, Mg, C and Si were weighed. The weighed materials were mixed and milled for 9 hours by planetary ball mil and under argon atmosphere. Milled materials...
Betel nut (BN), betel quid (BQ) and products derived from them are widely used as a socially endorsed masticatory product. The addictive nature of BN/BQ has resulted in its widespread usage making it the fourth most abused substance by humans. Progressively, several additives, including chewing tobacco, got added to simple BN preparations. This addictive practice has been shown to have strong e...
Band gap opening and engineering is one of the high priority goals in the development of graphene electronics. Here, we report on the opening and scaling of band gap in BN doped graphene (BNG) films grown by low-pressure chemical vapor deposition method. High resolution transmission electron microscopy is employed to resolve the graphene and h-BN domain formation in great detail. X-ray photoele...
A monolayer hexagonal boron nitride (h-BN) film with controllable domain morphology and domain size (varying from less than 1 μm to more than 100 μm) with uniform crystalline orientation was successfully synthesized by chemical vapor deposition (CVD). The key for this extremely large single crystalline domain size of a h-BN monolayer is a decrease in the density of nucleation seeds by increasin...
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