نتایج جستجو برای: response surface methodology environment

تعداد نتایج: 2201243  

Journal: :jundishapur journal of microbiology 0
seyed bahman momen department of biochemistry, faculty of biological sciences, tarbiat-modares university, tehran, ir iran seyed davar siadat department of bacteriology, institute pasteur of iran, tehran, ir iran neda akbari department of microbiology, faculty of basic sciences, arak branch, islamic azad university, arak, ir iran bijan ranjbar department of biochemistry, faculty of biological sciences, tarbiat-modares university, tehran, ir iran khosro khajeh department of biochemistry, faculty of biological sciences, tarbiat-modares university, tehran, ir iran; department of biochemistry, faculty of biological sciences, tarbiat-modares university, tehran, ir iran. tel: +98-2182884717, fax: +98-2182884718

conclusions we found ccd and rsm very effective in optimizing hib culture conditions, and hib biomass production was greatly influenced by ph and incubation temperature. therefore, optimization of the growth factors to maximize hib production can lead to 1) an increase in bacterial biomass and prp productions, 2) lower vaccine prices, 3) vaccination of more susceptible populations, and 4) lower...

2008
T. H. Hou

The processability of a phenylethynyl terminated imide resin matrix (designated as PETI-5) composite is investigated. Unidirectional prepregs are made by coating an N-methylpyrrolidone solution of the amide acid oligomer (designated as PETAA-5/NMP) onto unsized IM7 fibers. Two batches of prepregs are used: one is made by NASA in-house, and the other is from an industrial source. The composite p...

Journal: :مهندسی صنایع 0
طه حسین حجازی دانشکده مهندسی صنایع و سیستم¬های مدیریت- دانشگاه صنعتی امیرکبیر تهران میرمهدی سیداصفهانی دانشکده مهندسی صنایع و سیستم¬های مدیریت- دانشگاه صنعتی امیرکبیر تهران اسماعیل خرم دانشکده ریاضی و علوم کامپیوتر- دانشگاه صنعتی امیرکبیر تهران

in design of experiments, analysis and identifying those variables that affect the outputs are of interest. response surface methodology is a mathematical-statistical method to optimize the experiment outputs. this method tries to find the best response levels by optimizing the design variables called factors. in many engineering applications, robust design has become the most important issues....

Journal: :health scope 0
hooshyar hossini department of environmental health, tarbiat modares university, tehran, ir iran abbas rezaee department of environmental health, tarbiat modares university, tehran, ir iran; department of environmental health, tarbiat modares university, tehran, ir iran. tel: +98-2182883575, fax: +98-2182883575

conclusions the results of this study show that it is possible to remove nitrate, and its intermediates from waste water. regarding the desirability of the process, the field scale study is proposed. results the results showed that by applying electric current of 0.14 a for 120 minutes, the nitrate content would reduce down to 97%. the obtained r2 for the nitrate removal model was higher than 0...

Journal: :iranian journal of materials science and engineering 0
n. radhika amrita school of engineering, coimbatore,india r. raghu department of metallurgical engineering, psg college of technology, coimbatore-641004, india

functionally graded aluminium/zirconia metal matrix composite was fabricated using stir casting technique followed by horizontal centrifugal casting process and a hollow cylindrical functionally graded composite (150 x 150 x 16 mm) was obtained with centrifuging speed of 1200 rpm. the microstructural evaluation and hardness test was carried out on the outer and inner surface of the functionally...

Journal: :applied food biotechnology 0
tahereh ghashghaei department of microbiology, faculty of biological science, alzahra university, vanak, tehran, iran. mohammad reza soudi department of microbiology, faculty of biological science, alzahra university, vanak, tehran, iran. saman hoseinkhani department of biochemistry, faculty of biological science, tarbiat modares university, tehran, iran.

low grade grape juice concentrate was used as carbon source for xanthan production. significant factors affecting xanthan concentration, productivity and viscosity were investigated using plackett-burman design. based on the obtained results, carbon and nitrogen concentrations, inoculum size and agitation rate, were assumed as significant factors. broth culture viscosity and xanthan concentrati...

Journal: :international journal of industrial mathematics 2016
m. r. shahriari‎

with the huge global and wide range of attention placed upon quality, promoting and optimize the reliability of the products during the design process has turned out to be a high priority. in this study, the researcher have adopted one of the existing models in the reliability science and propose a bi-objective model for redundancy allocation in the series-parallel systems in accordance with th...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه صنعتی امیرکبیر(پلی تکنیک تهران) - دانشکده مهندسی مکانیک 1386

خمکاری در صنعت ورقکاری از اهمیت زیادی برخوردار است. برگشت فنری در خمکاری قطعات دقیق می تواند باعث تغییرات تهندسی قابل توجه شده و لذا مشکلات کیفیتی ایجاد نماید به همین علت برگشت فنری ورق در تولید قطعات خم دار در یک محدوده تلرانسی قابل قبول برای کنترل پروسه تولید در نظر گرفته می شود. در بسیاری از مکانیزم ها علاوه بر اینکه رعایت مشخصات دقیق هندسی خم در عملکرد صحیح آن تأثیر مستقیم دارد. مونتاژ صحیح...

پایان نامه :دانشگاه آزاد اسلامی - دانشگاه آزاد اسلامی واحد شاهرود - دانشکده علوم پایه 1392

در این تحقیق از نانو لوله های کربنی تک جداره برای حذف فلزسنگین سرب از محلول های آبی استفاده شده است. در ابتدا پارامترهای تاثیر گذار بر فرایند جذب محاسبه و در ادامه با یکدیگر مقایسه شدند. در فرایند حذف از روش ناپیوسته (batch) بهره گرفته شد و تاثیر متغیرهایی از قبیل غلظت های اولیه یون سرب در محلول، زمان تماس، ph ، مقدار جاذب و دما روی بازده حذف یون فلز سرب به کمک روش نوین طراحی آزمایش وبا استفاده...

Journal: :health scope 0
mohammad ali zazouli health sciences research center, department of environmental health engineering, faculty of health, mazandaran university of medical sciences, sari, ir iran ramazan ali dianati tilaki health sciences research center, department of environmental health engineering, faculty of health, mazandaran university of medical sciences, sari, ir iran marjan safarpour student research committee, faculty of health, mazandaran university of medical sciences, sari, ir iran; student research committee, faculty of health, mazandaran university of medical sciences, sari, ir iran. tel: +98-2314481905

background contamination of water resources with nitrate is a serious environmental problem in many regions of the world. in addition, this problem has been observed in some regions of iran. as nitrate is threatening for human health and environment, it must be decreased to standard levels in drinking water. objectives the purpose of this research was to model the nitrate removal from water by ...

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