نتایج جستجو برای: grinding

تعداد نتایج: 8022  

Journal: :Chemical communications 2012
Na Zhao Zhiyong Yang Jacky W Y Lam Herman H Y Sung Ni Xie Sijie Chen Huimin Su Meng Gao Ian D Williams Kam Sing Wong Ben Zhong Tang

Melding a benzothiazolium unit with tetraphenylethene generates a new hemicyanine luminogen with aggregation-induced emission characteristics; the luminogen exhibits crystochromism and its solid-state emission can be repeatedly tuned from yellow or orange to red by grinding-fuming or grinding-heating processes due to the transformation from the crystalline to the amorphous state and vice versa.

2017
Maria Laura Marongiu

Surgical husbandry practices carried out on farm animals in many management systems are: castration, docking, disbudding, dehorning, spaying, ear notching, ear tagging, brandinghot, branding-freeze, mulesing, teeth grinding, teeth clipping, tusk grinding, nose ringing, tail nicking, beak trimming. The management of farm animals is based on the ability to control them and many aspects of their e...

Journal: :international journal of occupational and environment medicine 0
e rafeemanesh department of occupational medicine, faculty of medicine, mashhad university of medical sciences, mashhad, iran mr majdi faculty of public health, mashhad university of medical sciences, mashhad, iran sm ehteshamfar occupational and environmental health department, health center, mashhad university of medical sciences, mashhad, iran mj fahoul occupational and environmental health department, health center, mashhad university of medical sciences, mashhad, iran z sadeghian nuclear medicine research center, faculty of medicine, mashhad university of medical sciences, mashhad, iran

background: agate is a hard silica stone with bands of various colors, which is used in jewelry. the agate grinding workers are exposed to silica dust. objective: to determine the prevalence of respiratory diseases in agate grinding workers and the associated factors. methods: in this cross-sectional study, 170 agate grinding workers from mashhad, northeastern iran, were examined. medical and o...

Journal: :The Annals of occupational hygiene 2011
Ingrid Liljelind Jens Wahlström Leif Nilsson Allan Toomingas Lage Burström

BACKGROUND Measurements of exposure to vibrations from hand-held tools are often conducted on a single occasion. However, repeated measurements may be crucial for estimating the actual dose with good precision. In addition, knowledge of determinants of exposure could be used to improve working conditions. The aim of this study was to assess hand-arm vibration (HAV) exposure during different gri...

پایان نامه :دانشگاه تربیت معلم - تبریز - دانشکده علوم پایه 1389

چکیده: 4-آریل-1و4-دی هیدروپیریدین ها ، 4-آریل-h4-پیران ها و کرومن ها به علت بلوکه کنندگی کانال های کلسیم و خواص بیولوژیکی دیگر بسیار مورد توجه هستند. تاثیر ترکیبات دارای استخلاف آمین این نوع مواد بر روی سیستم عصبی انسان قبلا به اثبات رسیده است. بنابراین سعی شده است برای تهیه مشتقات مختلفی از این ترکیبات روشهایی با کارایی بیشتر ابداع شود. کارایی یک سنتز شیمیایی نه فقط با پارامترهایی از قبیل ان...

Journal: :Dental materials : official publication of the Academy of Dental Materials 2013
S S Scherrer M Cattani-Lorente S Yoon L Karvonen S Pokrant F Rothbrust J Kuebler

OBJECTIVE Processing parameters (powder granulation, compaction, debinding, greenbody shaping, sintering) and post-sinter rough, even fine grinding are influencing the final mechanical properties of 3Y-TZP. The hypothesis of this study was that post-sinter hot isostatic pressing (post-HIP) would be beneficial for improving reliability and strength of both sintered and coarse ground sintered zir...

2014
Sylvie Giger-Reverdin Chiraze Maaroufi Patrick Chapoutot Corinne Peyronnet Daniel Sauvant

In ruminant nutrition, peas are characterized by high protein solubility and degradability, which impair its protein value estimated by the official in situ method. Grinding can be used as a technological treatment of pea seeds to modify their nutritional value. The aim of this study was to compare the in situ method with an in vitro method on the same pea either in a coarse pea flour form (PCF...

Journal: :Proceedings of the Institution of Automobile Engineers 1912

2016
Jing Yang

The tribological and mechanical behavior of coated tools depends not only on intrinsic properties of the deposited film but also on substrate surface and subsurface properties – such as topography and residual stress state – as well as on interface adhesion strength. It is particularly true in the case of coated tools based on WC-Co cemented carbides (backbone materials of the tool manufacturin...

2005
T. Nguyen L. C. Zhang

This paper develops a quantitative model to predict the power of coolant penetration into the grinding zone of a segmented wheel. The model accounts for the coolant properties and system design characteristics governing the penetration mechanism revealed by the theory established in Part 1 of this series study. By coupling with the author’s previous mist formation analysis, the model offers a q...

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