نتایج جستجو برای: visual assessment base metal

تعداد نتایج: 1329372  

Journal: :iranian journal of public health 0
nurul syazani yuswir sarva mangala praveena ahmad zaharin aris sharifah norkhadijah syed ismail zailina hashim

background: the aim of this study was to determine bioavailability heavy metal concentrations of cu, cd, cr, co and zn and health risk assessment in different types of klang district, selangor (malaysia) urban surface soil using in physiologically based extraction test in vitro human digestion model. methods: a total of 76 urban surface soil was sampled based on seven different types of land us...

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Journal: :حفاظت گیاهان 0
کمال حاج محمدنیا قالی باف محمد حسن راشد محصل مهدی نصیری محلاتی اسکندر زند

abstract to study the efficacy of glyphosate and nicosulfuron herbicides on barnyardgrass [echinochloa crus-galii (l.) p. beauv.] and velvetleaf (abotilon theophrasti medicus.) control and to find the ed50 index, experiments were conducted as factorial arrangement of treatments 2×7 based on completely randomized design with six replications for each weed in 2008-9 at research greenhouse, ferdow...

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ژورنال: مجله دندانپزشکی 2000
حاج محمودی, محمدرضا , فاضل, اکبر , گرامی پناه, فریده ,

It has been shown that noble alloys require metal collar to resist distortion when subjected to repeat firing cycle of porcelain. Metal collar is undesirable due to esthetic concerns. Since base metal alloys have superior physical properties, it seems that metal collar would not be necessary for obtaining better marginal adaptation of base metal crowns. The Purpose of this study was to evaluate...

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Journal: :journal of dental research, dental clinics, dental prospects 0
milad motamedi farnaz fattahi

background and aims. in order to fabricate prostheses with high accuracy and durability, soldering techniques have been introduced to clinical dentistry. however, these prostheses always fail at their solder joints. the purpose of this study was to evaluate the effect of gap distance on the tensile strength of base metal solder joints. materials and methods. based on ada/iso 9693 specifications...

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پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه بیرجند - دانشکده علوم انسانی 1389
محمدعلی ارباب خالص, ابراهیم قیامتی یزدی, حیدر رییسی,

abstract amino acids are building blocks of proteins, and play a vital role in living beings existence and their functionality. the interaction of these compounds with metal ions is of great importance to biochemists, and chemists, because their functions can be utilized as a model in understanding enzymes mechanism for transport of metal ions to tissues. among twenty essential amino acids w...

15 صفحه اول
ژورنال: مجله دندانپزشکی 2007
سیادت, حکیمه , علی خاصی, مرضیه , محمد علیزاده, محسن , میرفضائلیان, علی ,

Background and Aim: An important criterion for success assessment of implant-supported prostheses is marginal fit. Vertical and horizontal discrepancy can result in loosening of the prosthetic screw, crestal bone resorption, peri-implantitis and loss of osseointegration. Despite careful attention to waxing, investing, and casting, marginal discrepancies are inevitable. The aim of this study was...

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Journal: :iranian journal of catalysis 2015
maryam tayebani behroze shafaat marzi iravani

a series of transition metal complexes with two thiosemicarbazide schiff bases, 1-(4-dimethylaminobenzyl- idene)thiosemicarbazide (abtsc) and 1-(2-pyridincarboxyl-idene) thiosemicarbazide (tcts) were synthesized with co(ii), ni(ii), zn(ii), cd(ii) and ag(i) salts (chloride and acetate). these complexes were characterized by different methods including proton nuclear magnetic resonance (1hnmr), ...

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Journal: Journal of Advanced Materials and Processing 2013
Farrokh Najafzadegan, Hojatallah Mansori, Morteza shamanian,

In the present study, the microstructure of welded zone of Hastelloy X sheets with thickness of 1 mm via pulsed Nd-YAG laser welding were studied. This welding process was done by autogenus and conductive method. Microstructure were observed by metallurgical OM and SEM. Results shown Solidification of the weld metal is dendritic. The dendrites in the central zone of the welding are fine and equ...

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ژورنال: علوم و فناوری جوشکاری ایران 2018
Sabet, H., Razavi, S. H. , Siddiqui, M. ,

In this research  the effect of heat treatment offer welding (PWHT) in 650,750 and 8500C for two hours on Sulfide stress corrosion cracking resistance (SSC), welding metal Inconel 625 to low alloy steel 4130 was analyzed that was welded using Automatic TIG welding process then the mechanical properties of the joint was observed using micro hardness measure experiment (weld metal, base metal and...

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ژورنال: مجله علمی-پژوهشی علوم و فناوری جوشکاری ایران 2018
Sabet, H., Razavi, S. H. , Siddiqui, M. ,

In this research  the effect of heat treatment offer welding (PWHT) in 650,750 and 8500C for two hours on Sulfide stress corrosion cracking resistance (SSC), welding metal Inconel 625 to low alloy steel 4130 was analyzed that was welded using Automatic TIG welding process then the mechanical properties of the joint was observed using micro hardness measure experiment (weld metal, base metal and...

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