نتایج جستجو برای: چاپر ac

تعداد نتایج: 34661  

ژورنال: :تحقیقات نوین در برق 0
علی سیاحی حسن براتی

چکیده: در این مقاله دو روش برای تشخیص خطاهای زمین در سیستم تحریک استاتیک مبتنی بر تبدیل فوریه سریع مورد بررسی قرار گرفته است. روش اول فقط در صورت عدم وجود خطای دیگری در سیستم تحریک، می­تواند نشان دهد که خطای زمین در سمت ac سیستم تحریک و یا در سمت dc آن رخ داده است. در روش دوم حتی با وجود خطای مدار باز یا اتصال کوتاه در دیودهای یکسوساز، خطای زمین رخ داده در سمت dc و یا سمت ac  قابل تشخیص می ­باش...

Journal: :journal of chemical health risks 0
n. mosallanejad department of chemistry science, firuz abad branch, islamic azad university, firuz abad, iran a. arami department of law, central branch, islamic azad university, tehran, iran

the objective of this study was to assess the potential of cadmium sulfide nanoparticles loaded onto activated carbon (cdsn-ac) for the removal of sunset yellow (sy) dye from aqueous solution. adsorption studies were conducted in a batch mode varying solution ph, contact time, initial dye concentration, cdsn-ac dose. in order to investigate the efficiency of sy adsorption on cdsn-ac, pseudo-fir...

Journal: :Journal of hazardous materials 2010
L Pereira R Pereira M F R Pereira F P van der Zee F J Cervantes M M Alves

The surface chemistry of a commercial AC (AC(0)) was selectively modified, without changing significantly its textural properties, by chemical oxidation with HNO(3) (AC(HNO3)) and O(2) (AC(O2)), and thermal treatments under H(2) (AC(H2)) or N(2) (AC(N2)) flow. The effect of modified AC on anaerobic chemical dye reduction was assayed with sulphide at different pH values 5, 7 and 9. Four dyes wer...

2017
Rudolf Pfab Sabrina Schmoll Gabriele Dostal Jochen Stenzel Alexander Hapfelmeier Florian Eyer

CONTEXT Oral activated charcoal (AC) for toxin absorption should be applied as soon as possible. Extra-hospital AC-application on site by medical laypersons with pre-emptive obtained AC may save time, but may be inferior to AC-application by medical professionals. OBJECTIVE 1) Availability and incidence of pre-emptive stockpiling of AC on site in the German region Bavaria 2) time saved by AC-...

In this study, Mesobuthus gibbosus and Mesobuthus eupeus eupeus venom samples were compared for lethality, in vivo effects and proteins. Neutralization capacity of monovalent Androctonus crassicauda antivenom (RSHA anti-Ac) was tested against the lethal effects of the venoms.Venom was obtained from mature scorpions by electrical stimulation of the telson. The lethality of the venom and potency ...

2012
Sanjay Mohite Narayan Pisharoty

This paper presents novel concept of a multiple converter. It works in three modesAC-AC converter voltage regulator, AC-AC converter frequency changer and AC-DC converter. All three modes work simultaneously. AC-AC converter mode of operation alters low input frequency to high output frequency across the load. AC-DC converter mode of operates with variable amplitude across load. This concept is...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه تبریز - دانشکده مهندسی برق 1393

امروزه اهمیت کیفیت توان به دلیل گسترش استفاده از تجهیزات حساس به کیفیت توان و ضررهای اقتصادی و فنی ناشی از پایین بودن کیفیت توان بر کسی پوشیده نیست. برای مشترکین و مصرف کنندگان برق که دارای تجهزات حساس هستند، کیفیت ولتاژ از اهمیت ویژه ای برخوردار است. در بین عوامل کیفیت توان مرتبط با ولتاژ نیز دو پدیده کمبود ولتاژ و بیشبود ولتاژ از همه مهمتر هستند. برای جبران این دو پدیده مرتبط با کیفیت ولتاژ ب...

Journal: :The Journal of pharmacology and experimental therapeutics 2011
Jian-Nong Ma Michelle Owens Magnus Gustafsson Jacob Jensen Ali Tabatabaei Kara Schmelzer Roger Olsson Ethan S Burstein

We discovered structurally novel human calcium-sensing receptor (CaSR) allosteric agonists and compared their pharmacology to phenylalkylamine calcimimetics. 1-Benzothiazol-2-yl-1-(2,4-dimethyl-phenyl)-ethanol (AC-265347) activated CaSR signaling in cellular proliferation and phosphatidylinositol (PI) hydrolysis assays with potencies of 30 and 10 nM, respectively. (S)-1-Benzothiazol-2-yl-1-(2,4...

Journal: :IEEE Transactions on Power Electronics 2021

A novel single-phase pulsewidth modulation (PWM) direct ac-ac converter based on two-level nondifferential dual-buck ac chopper legs with inverting and noninverting operations is first proposed in this article. It has the ability to resolve both voltage sag swell problems at same time when used as distributed flexible conditioner. Compared traditional converter, it much enhanced system reliabil...

Journal: :The Biochemical journal 2005
Debora Steiner Tomer Avidor-Reiss Ester Schallmach Elena Butovsky Nirit Lev Zvi Vogel

We previously reported that acute agonist activation of G(i/o)-coupled receptors inhibits adenylate cyclase (AC) type VIII activity, whereas agonist withdrawal following chronic activation of these receptors induces AC-VIII superactivation. Three splice variants of AC-VIII have been identified, which are called AC-VIII-A, -B and -C (with AC-VIII-B missing the glycosylation domain and AC-VIII-C ...

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