نتایج جستجو برای: فولاد ابزار سردکار din 12210
تعداد نتایج: 61524 فیلتر نتایج به سال:
در این مقاله تاثیر نانوسیال اکسید مس با سیال پایه آب صابون (روغن حل شونده) بر روی نیروی ماشینکاری و زبری سطح قطعه کار در فرایند تراشکاری فولاد ابزار عملیات حرارتی شده (aisi 4340) مورد مطالعه قرار گرفته و نتایج حاصل با حالت خشک و سیال برشی حل شونده مقایسه شده است. نتایج بدست آمده نشان می دهد افزودن نانوذرات اکسید مس به مقدار 1% حجمی به روغن حل شونده موجب کاهش قابل ملاحظه ی مقدار زبری سطح قطعه کا...
BACKGROUND Postsurgical treatment of ductal intraepithelial neoplasia (DIN) with standard doses of tamoxifen has not reached a consensus yet. Given positive results of low-dose tamoxifen on breast cancer biomarkers modulation, we analyzed a large cohort of DIN patients treated with low-dose tamoxifen or no treatment as per institutional guidelines. PATIENTS AND METHODS All consecutive women o...
Monthly time series of nutrient pools and transport in the Baltic Entrance were computed for the period 1974–1999 from a combination of hydrodynamic model results and observational data obtained in national monitoring programmes. Significant seasonal variations in both nutrient pools and transport were found. For example, inflowing dense nutrient-rich Skagerrak water causes net transport of dis...
Spaţiile virtuale 3D devin din ce în ce mai mult utilizate, de la jocuri până la aplicaţii industriale, medicale, militare sau ştiinţifice. Unele dintre cele mai importante aplicaţii ale acestora sunt în e-learning şi edutainment. Lucrarea de faţă prezintă elementele constitutive şi aspecte ale creării unui”muzeu virtual 3D”, pornind de la experienţa autorilor în dezvoltarea aplicaţiei software...
The concentration of dissolved inorganic nitrogen (DIN) in the porewaters of shallow-water tropical marine sediments can be as high as 50-100 µM, at sediment depths of shallow as 20 cm. These concentrations are at least two-orders of magnitude greater than the DIN concentration in the overlying water. High porewater concentrations, and the resulting concentration gradient, result in substantial...
Rezumat: Sănătatea fizică și psihică bună reprezintă indubitabil unele dintre cele mai prețioase calități pe care le poate poseda o persoană. Fără aceste elemente, orice activitate simplă devine un efort iar orice efort devine o imposibilitate. Astfel, o mare parte din populația din România care se prezintă în camera cu gardă cu stare generală alterată dată de hipertensiunea arteriala (HA) rapo...
BACKGROUND Ductal intraepitelial neoplasia (DIN) represents a spectrum of disease that may progress from usual hyperplasia to ductal carcinoma in situ (DCIS) grade 3. The aim of the study was to asses the correlation between the DIN classification and the surgical treatment including sentinel lymph node biopsy (SLNB). PATIENTS AND METHODS In this retrospective study, 229 patients with DIN had...
A novel stability-indicating reverse phase high performance liquid chromatography method was developed and validated for the simultaneous determination of Celecoxib (CEL) and Diacerein (DIN) and its impurities in capsule dosage form. The method was developed using L1 column with gradient using the mobile phase consist of Solution A (pH = 2.3 buffer) and Solution B (methanol and acetonitrile; 50...
In nitrogen (N)-limited systems, the potential to sequester carbon depends on the balance between N inputs and losses as well as on how efficiently N is used, yet little is known about responses of these processes to changes in plant species richness, atmospheric CO2 concentration ([CO2]), and N deposition. We examined how plant species richness (1 or 16 species), elevated [CO2] (ambient or 560...
tinere talente recrutate de profesorul Thoma Ionescu, a cărui intuiţie în alegerea colaboratorilor, viitorilor profesori de chirurgie, şefi de şcoală la rândul lor, nu a dat niciodată greş. Născut la 14 mai 1870 în oraşul Bârlad, acest fiu strălucit al pământului Moldovei, a reuşit prin calităţile sale înnăscute, dar mai ales printr-o muncă ordonată şi neobosită, să făurească o operă nepieritoa...
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