نتایج جستجو برای: 100 km
تعداد نتایج: 469549 فیلتر نتایج به سال:
Previous work has indicated a clear, consistent diurnal cycle in rainfall and cold cloudiness coverage around tropical cyclones. This cycle may have important implications for structure and intensity changes of these storms and the forecasting of such changes. The goal of this paper is to use passive and active microwave measurements from the Tropical Rainfall Measuring Mission (TRMM) Microwave...
Twenty-one runners died of hypothermia during the 100 km Ultramarathon Mountain race in Baiyin, Gansu Province on 22 May 2021. The was caused by a combination low temperatures, precipitation, and high winds associated with typical large-scale cold front passing site that morning. Based historical hourly records 13 meteorological surface stations over past six years, temperature (3.0°C) apparent...
Shikimate kinase II was purified to near homogeneity from an Escherichia coli strain which overproduced the enzyme. The apparent Km of this isoenzyme for shikimate was 200 microM, and for ATP it was 160 microM. The Km for shikimate is approximately 100-fold lower than the Km of shikimate kinase I, suggesting that shikimate kinase II is the isoenzyme normally functioning in aromatic biosynthesis...
We investigate dual concentric core and microstructure fiber geometries for dispersion compensation. Dispersion values as large as -59 000 ps/(nm km) are achieved, over a broad wavelength range with full width at half maximum exceeding 100 nm. The trade-off between large dispersion and mode area is studied. Geometries with an effective mode area of 30 microm2 and dispersion -19 000 ps/(nm km) a...
Despite the ecological and economic importance of the Arapaima gigas (Cuvier 1817), few data about its dispersal capacity are available. The present study was based on the analysis of microsatellite markers in order to estimate the dispersal capacity of the species on fine, meso, and large geographic scales. For this, 561 specimens obtained from stocks separated by distances of up to 25 km (fin...
We conducted meteor echo observations using the Buckland Park MF radar (35 S, 138 E) at 00:40{05:45LT on October 22, 1997. In addition to the usual full correlation analysis (FCA) technique to measure horizontal wind velocities from 60 to 100 km MF radars have a potential to detect meteor echoes and infer winds through their Doppler frequency shifts. Because of the relatively low radio frequenc...
We study the modulation of atmospheric nonisothermality and wind shears on the propagation of seismic tsunami-excited gravity waves by virtue of the vertical wavenumber, m (with its imaginary and real parts, mi and mr, respectively), within a correlated characteristic range of tsunami wave periods in tens of minutes. A generalized dispersion relation of inertio-acoustic-gravity (IAG) waves is o...
We present Far Ultraviolet Spectroscopic Explorer observations of the molecular, neutral atomic, weakly ionized, and highly ionized components of the interstellar and intergalactic material toward the quasar 3C 273. We identify Lyβ absorption in 8 of the known intergalactic Lyα absorbers along the sight line with rest-frame equivalent widths Wr(Lyα) & 50 mÅ. Refined estimates of the H I column ...
این مطالعه گزارشی از جداسازی، خالصسازی و تعیین ویژگیهای بیوشیمیایی آنزیم تبدیل کننده آنژیوتنسین i از بافت ریه شترمرغ (struthio camelus) با استفاده از تکنیک های کروماتوگرافی ژل فیلتراسیون و تبادل یونی است. وزن مولکولی آنزیم تخلیص شده بر اساس تکنیک sds-page، 5/178 کیلودالتون تعیین شد. بهترین فعالیت آنزیم در محدوده phبرابر 8-5/7 و حداکثر فعالیت آنزیم در 5/7=ph بدست آمد. بررسی اثر دما بر فعالیت a...
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