نتایج جستجو برای: concentration of carriers
تعداد نتایج: 21177672 فیلتر نتایج به سال:
A new model for incomplete ionization of dopants in Si is presented, where the Fermi level free carriers may displace with respect to case full activation dopants. The curves ratio free-carrier density and active-dopants vs doping, which are calculated at partial model, overlap exactly same quantity a reported model. Calculations performed without parameterizations states occupancy probability ...
The plant hormone auxin plays an essential role in the patterning of plant structures. Biological hypotheses supported by computational models suggest that auxin may fulfil this role by regulating its own transport, but the plausibility of previously proposed models has been questioned. We applied the notion of unidirectional fluxes and the formalism of Petri nets to show that the key modes of ...
We investigate the Josephson effect in the graphene nanoribbons of length L smaller than the superconducting coherence length and an arbitrary width W . We find that in contrast to an ordinary superconducting quantum point contact (SQPC) the critical supercurrent Ic is not quantized for the nanoribbons with smooth and armchair edges. For a low concentration of the carriers Ic decreases monotoni...
Background & Aim: Staphylococcus aureus is one of the main causes of nosocomial infections and plays an important role in making hospital staff sick. This study was aimed to investigate the frequency of Staphylococcus aureus carriers and its methicillin-resistant pattern in Torbat Heydariyeh hospitals staff in 2013. Methods: This is a descriptive/cross sectional study conducted on 130 hospit...
Background: The hepatitis B virus infection is a major cause of liver diseases in the world. It mostly affects psychological and social aspects as well as the mental health of patients. The aim of this study was to explain the process of social interactions in patients with Hepatitis B Virus (HBV) infection. Methods: The present study was conducted using the grounded theory method from 2...
Vitamins are important in various biochemical and physiological processes and are essential for the normal functioning of our bodies. Several studies suggested the role of vitamins A, E and D in carcinogenesis. The aim of this study was to analyze an association between concentration of vitamins A, E and D in serum and cancer risk in BRCA1 mutation carriers. Study was conducted on 99 patients a...
The effect of light on the properties ${\mathrm{PbTiO}}_{3}/{\mathrm{SrTiO}}_{3}$ superlattices is studied using first-principles calculations in their paraelectric phase $p$ as well the, $c, r$, and $aa$ phases that are defined by polarization lying along [001], $[11v]$, [110] directions, respectively. While $r$ ground state dark conditions, illumination triggers a rotation towards out-of-plan...
The aim of the present study was to investigate the distribution of CYP2C8 variants *3 and *5, as well as their effect on carbamazepine pharmacokinetic properties, in 40 epileptic pediatric patients on carbamazepine treatment. Genotyping was conducted using polymerase chain reaction-restriction fragment length polymorphism (PCR-RFLP), and allele-specific (AS)-PCR methods, and steady-state carba...
Continued Haemophilus influenzae type b (Hib) carriage in rural Alaska contributes to the ongoing risk of invasive disease. Community-wide Hib carriage surveys were conducted in three villages in southwestern Alaska. Sixteen carriers and 32 age- and village-matched controls were enrolled and were vaccinated with Hib oligosaccharide-CRM(197) conjugate vaccine. Serum immunoglobulin G (IgG) concen...
In order to determine the frequency and distribution of nasal carriers of staphylococcus aureus and their antimicrobial resistance in hospital staff, a cross-sectional descriptive study was performed on 126 hospital staff and on 130 non-hospital staff of Hamadan University of Medical Sciences as control group. Speciments of nasal swabs were cultured on blood agar and the isolated coagulase...
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