نتایج جستجو برای: 900 and 1300 ppm

تعداد نتایج: 16833158  

2001
Keith Thompson Yogesh B. Gianchandani Reid F. Cooper

A novel heating technique, electromagnetic induction heating (EMIH), uses electromagnetic radiation, ranging in frequency from a few megahertz to tens of gigahertz, to volumetrically heat silicon above 1000 C in only a few seconds. Typical power requirements fall between 900 to 1300 W for silicon wafers 75 to 100 mm in diameter. This technique has successfully produced direct silicon wafer-to-w...

پایان نامه :0 1370

all analytical methods are generally based on the measurement of a parameter or parameters which are somehow related to the concentration of the species.an ideal analytical method is one in which the concentration of a species can be measured to a high degree precision and accuracy and with a high sensitivity. unfortunately finding such a method is very difficult or sometimes even impossible.in...

Journal: :Science 2004
Edward R Cook Connie A Woodhouse C Mark Eakin David M Meko David W Stahle

The western United States is experiencing a severe multiyear drought that is unprecedented in some hydroclimatic records. Using gridded drought reconstructions that cover most of the western United States over the past 1200 years, we show that this drought pales in comparison to an earlier period of elevated aridity and epic drought in AD 900 to 1300, an interval broadly consistent with the Med...

Journal: :Optics letters 2006
Feruz Ganikhanov Silvia Carrasco X Sunney Xie Mordechai Katz Wolfgang Seitz Daniel Kopf

The signal and idler beams from a picosecond, synchronously pumped optical parametric oscillator (OPO) provide the two colors necessary for coherent anti-Stokes Raman scattering (CARS) microscopy. The OPO provides a continuously tunable frequency difference between the two beams over a broad range of Raman shifts (100-3700 cm(-1)) by varying the temperature of a single nonlinear crystal. The ne...

Journal: :AI Magazine 1981
Donald E. Walker Edward A. Feigenbaum

The first national conference, held at Stanford The current AAAI membership is approximately University August 17-21, 1980, was a distinctive success: 1300; members are advised that dues in the amount of attendance was surprisingly high (over 900) with $10 regular, $5 student, for the new membership year, 1 representatives from industry and the financial September 1981 through 31 August 1982 ar...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه تربیت مدرس 1389

abstract this study was carried out to compare disinfecting effects of nanosilver with other feed disinfectants on layer hen performance, immune system, gastrointestinal microflora and intestinal morphology. total of 90 layers (lsl) were divided into five groups consisting: 1-control, 2- formalin (200 ppm), 3- formaycin (200 ppm), 4- nanosilver in drinking water (7.5 ppm) and 5-nanosilver in f...

Journal: :Procedia of Engineering and Life Science 2022

One of the reasons for air pollution that occurs at this time is emission motorcycle exhaust. According to some sources, trembesi leaves can absorb level exhaust emissions. By making extracts from and added part motorcycle. Because last place discharge combustion waste process on motorcycles result when has not been leaf extract produce a Nitrogen Oxide (Nox) gases 0.21 ppm. While results are d...

Journal: :International Journal of Enviornment and Climate Change 2023

A field experiment was conducted during Kharif 2022 at Crop Research Farm, Department of Agronomy, SHUATS, Prayagraj (U.P) to determine the “Effect nano zinc and foliar application boron on growth yield finger millet (Eleusine coracana L.)”. The laid out in Randomized Block Design comprising 10 treatments which include three levels [Nano 300 ppm, 600 900 ppm] Boron [0.1%, 0.3% 0.5%], whose effe...

Journal: :Journal of Quaternary Science 2023

High-quality records of hydroclimate variability in central Mexico during the last 2000 years are necessary to better understand human–environment interactions Mesoamerica. Of particular interest climatic conditions Epiclassic period (ad 600–900), as droughts have been associated with a cultural demise occurring around ad 900–1000. We reconstruct history based on sediment record from drought-se...

Journal: :European journal of mass spectrometry 2012
Li Jing I Jonathan Amster

High mass measurement accuracy of peptides in enzymatic digests is critical for confident protein identification and characterization in proteomics research. Fourier transform ion cyclotron resonance mass spectrometry (FT-ICR-MS) can provide low or sub-ppm mass accuracy and ultrahigh resolving power. While for ESI-FT-ICR-MS, the mass accuracy is generally 1 ppm or better, with matrix-assisted l...

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