نتایج جستجو برای: فولاد 304

تعداد نتایج: 11784  

ژورنال: :مهندسی مکانیک مدرس 2014
موسی بلالی اوصیا سید جمال حسینی پور محمد بخشی جویباری عبدالحمید گرجی

صفحات دوقطبی یکی از مهمترین اجزای پیل های سوختی میباشند. این صفحات از روش های مختلف نظیر ماشینکاری، قالب گیری و شکل دهی و همچنین از جنس های مختلفی نظیر صفحات گرافیتی، کامپوزیتی و فلزی ساخته می شوند. در این پژوهش، شکل دهی صفحات دوقطبی فلزی از جنس فولاد زنگ نزن 304 با ضخامت 11/0 میلیمتر و با الگوی پینی به کمک فرآیند هیدروفرمینگ در قالب محدب بطور تجربی و شبیه سازی مورد بررسی قرار می گیرد. در این ر...

2010
F. Heath Damron Hongwei D. Yu

* Corresponding author 18 Mailing address: Robert C. Byrd Biotechnology Science Center, 1 John Marshall Drive, 19 Huntington, WV 25755-9320; Tel: 304-696-7356; Fax: 304-696-7207 20 E-mail: [email protected] 21 Copyright © 2010, American Society for Microbiology and/or the Listed Authors/Institutions. All Rights Reserved. J. Bacteriol. doi:10.1128/JB.01132-10 JB Accepts, published online ahead of...

2003
S. Ciprini G. Tosti

The high frequency peaked blazar PKS 2155-304 is one of the brightest and most intensively studied prototype of BL Lac objects. Gamma-rays from PKS 2155-304 have been detected from the MeV to TeV ranges. We computed a synchrotron self-Compton (SSC) model, based on the temporal behavior of the particles distribution, responsible for the high-energy emission. Using the available simultaneous mult...

Journal: :Metalurgi 2023

This research was conducted to analyze the hardness, microstructural morphology, and crystallography of MgB2 compound in form a SS 304-sheathed superconducting wire. wire with 304 outer sheath manufactured using an ex-situ rolling process. The results Vickers hardness test load 0.3 N showed value 355.1 HV. observations SEM-EDS (scanning electron microscopy-energy dispersive spectroscopy) agglom...

ژورنال: مهندسی متالورژی 2016

تحولات ریز ساختاری در حین عملیات آنیل فولاد زنگ نزن آستنیتی 304 پس از نورد سرد مورد ارزیابی قرار گرفت و مشخص شد که سه مرحله مجزا وجود دارد که شامل بازگشت مارتنزیت به آستنیت، تبلور مجدد آستنیت باقی مانده و رشد دانه می‌باشد. بازگشت مارتنزیت به آستنیت منجر به تولید ساختار فوق ریزدانه شد. با این وجود، تبلور مجدد آستنیت باقی مانده، تشکیل ساختار هم محور را به تاخیر انداخت و سبب شد که دانه های ریز آست...

Journal: :journal of ultrafine grained and nanostructured materials 0
reihane nafar dehsorkhi department of materials engineering, isfahan university of technology, isfahan, 84156-83111, iran. soheil sabooni department of materials engineering, isfahan university of technology, isfahan, 84156-83111, iran. abdoulmajid eslami department of materials engineering, isfahan university of technology, isfahan, 84156-83111, iran. fathallah karimzadeh department of materials engineering, isfahan university of technology, isfahan, 84156-83111, iran. behzad sadeghian department of materials engineering, isfahan university of technology, isfahan, 84156-83111, iran.

in the present study, an ultrafine grained (ufg) 304l stainless steel with the average grain size of 300 nm was produced by a combination of cold rolling and annealing. weldability of the ufg sample was studied by nd: yag laser welding under different welding conditions. taguchi experimental design was used to optimize the effect of frequency, welding time, laser current and laser pulse duratio...

2007
PASCAL FORTIN Fred Lawrence Whipple

The VERITAS collaboration has observed the high-frequency-peaked BL Lac object 1ES 1218+304 using an array of several imaging Cherenkov telescopes located at the Fred Lawrence Whipple Observatory in Southern Arizona. A gamma-ray signal was detected with high significance for the observations taken during several months in the 2006-2007 observing season. Here we present the detection of 1ES 1218...

Journal: :Bioscience, biotechnology, and biochemistry 2008
Shigekazu Yano Arata Honda Nopakarn Rattanakit Yuta Noda Mamoru Wakayama Abhinya Plikomol Takashi Tachiki

Chitinase A of Streptomyces cyaneus SP-27 or chitinase I of Bacillus circulans KA-304 showed the protoplast-forming activity when combined with alpha-1,3-glucanase of B. circulans KA-304. The gene of chitinase A was cloned. It consisted of 903 nucleotides encoding 301 amino acid residues, including a putative signal peptide (35 amino acid residues). The deduced N-terminal moiety of chitinase A ...

Journal: :The Biochemical journal 2002
Marion Blomenröhr Ton ter Laak Ronald Kühne Michael Beyermann Eveline Hund Jan Bogerd Rob Leurs

The gonadotropin-releasing hormone (GnRH) receptor in catfish differs from its mammalian counterparts in showing a very low affinity for the hypothalamic GnRH form [i.e. catfish GnRH (cfGnRH)] and a very high affinity for the highly conserved mesencephalic GnRH, chicken GnRH-II (cGnRH-II). In the present study we investigated the molecular interactions between ligand and receptor involved in de...

2009
Asif Imran

1ES 1218+304 is among a group of several TeV blazars that exhibit surprisingly hard energy spectra given their redshifts. The VERITAS collaboration has carried out an intensive observing campaign of 1ES 1218+304 in early 2009 to characterize the emission properties of one of these hard-spectra distant blazars in more detail. While hard-spectra TeV blazars are most promising for unveiling putati...

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