نتایج جستجو برای: solid phase
تعداد نتایج: 753523 فیلتر نتایج به سال:
اثر برخورد بین ذرات جامد در جریانهای گاز – جامد در بسیاری از موارد حتی در نسبت بارهای پایین قابل چشم¬پوشی نیست. در این پایان¬نامه برای شناخت و بررسی تاثیر و اهمیت برخورد ذرات, یک جریان مغشوش گاز- جامد رو به بالا در یک لوله عمودی با شار ثابت به روش چهارطرفه اویلرین- لاگرانژین شبیه سازی شده است. در این الگو علاوه بر در نظر گرفتن تاثیر دوفاز گاز- جامد روی هم در تبادل مومنتوم, انرژی, شدت توربولانس ...
Samples of BaTi03, PbTi0 3, and Pb (Tix,Zr ].x)0 3 (x=0.4 7) was pre pare d usi ng so lid and liquid phase me th ods. Mi cros tru cture study o r lh ese samples show a h ig h ~ r degree of homogeneity, higher density and reactivity in samples made by solutions phase method as compared to the solid phase technique.
The American Society for Testing and Materials (ASTM) recently updated its standards E 1387 and E 1618 for the analysis of fire debris. The changes in the classification of ignitable liquids are presented in this review. Furthermore, a new standard on extraction of fire debris with solid phase microextraction (SPME) was released. Advantages and drawbacks of this technique are presented and disc...
The co-digestion of two problematic and available wastes, namely Organic Fraction Municipal Solid Waste (OFMSW) and biological sludge, was carried out in this work. Biochemical Methane Potential (BMP) tests are a useful tool for determining the best substrate and co-digestion configurations, however there are some methodologies destined to save costs and time from this process by using the theo...
We present the results from our deep (16 12 hr) Westerbork Synthesis Radio Telescope (WSRT) observations of the approximately 7 deg2 Bootes Deep Field, centered at 14h32m05 975, 34 16047>5 (J2000.0). Our survey consists of 42 discrete pointings, with enough overlap to ensure a uniform sensitivity across the entire field, with a limiting sensitivity of 28 lJy (1 rms). The catalog contains 3172 d...
a phase-locked loop (pll) based frequency synthesizer is an important circuit that is used in many applications, especially in communication systems such as ethernet receivers, disk drive read/write channels, digital mobile receivers, high-speed memory interfaces, system clock recovery and wireless communication system. other than requiring good signal purity such as low phase noise and low spu...
a headspace-solid phase microextraction (hs-spme) and gas chromatography-mass spectrometry (gc-ms) method has been developed for the simultaneously determination of 20 disinfection by-products (dbps) in water samples from reverse osmosis (ro) membranes. selected compounds belong to different families including: trihalomethanes (thms), halogenated acetonitriles (hans), halogenated nitromethanes ...
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