نتایج جستجو برای: 740 and 770 unit
تعداد نتایج: 16860050 فیلتر نتایج به سال:
BACKGROUND Nosocomial transmission is the second most frequent cause of hepatitis C virus (HCV) infection. A prospective observational study was conducted to assess the roles of environmental contamination and noncompliance with standard precautions in HCV cross-transmission in a hemodialysis unit. METHODS Patients undergoing chronic hemodialysis in a French university hospital unit were syst...
A powerful photoand thermostable, LiF:Fj** color center laser pumped by radiation at 740 nm (alexandrite laser) or at 683 nm (Raman shifted (H2) second harmonic of a Nd:YAG laser) is described. This is the first time an average power as high as —1.4 W and an energy per pulse as high as 1OOmJ, with record real efficiency of 53% (683 nm pumping) and 28% (740 nm pumping) were achieved for a room t...
Magnetic field reversals are irregular events in Earth's history when the geomagnetic changes its polarity. Reversals recorded by spot and continuous remanent magnetization data collected from lava flows marine sediments, respectively. The latest reversal, Matuyama-Brunhes reversal (MBR), is better covered paleomagnetic than prior reversals, hence providing an opportunity to understand physical...
Background: Since non-contrast spiral CT (NCCT) is an imaging method of choice performed before extracorporeal shockwave lithotripsy (ESWL), we aimed to find the association between renal stone characteristics including stone density, location, volume, and skin-to-stone distance (SSD) on NCCT and ESWL success for a more efficient selection of patients for the procedure. Methods: We retrospec...
The thermochemlcal stablllty of fast oxygen ion conductlng yttria stabillzed blsmuthoxlde (YSB) r solld solutlons containing 22.0 32.5 mol% of yttrla was investigated. It was shown that In the temperature range between 650 740 C the stabilized cublc ~ -phase contalnlng less than 31.8 mol% of yttrla ls not stable durlng long term annealing treatments (>~500 hours). During annealing at 650 C a sl...
In this paper, we numerically demonstrated a simple metamaterial for wide-angle and polarization-insensitive absorption in the visible region, which simultaneously showed strongly suppressed near-infrared region. Numerical simulations that under normal incidence proposed absorber had high absorptivity almost over 90% wavelength range from 340 nm to 770 nm, while low less than 10% 1 μm 2 μm. Bec...
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