نتایج جستجو برای: chemical management

تعداد نتایج: 1216092  

ژورنال: علوم آب و خاک 2019

One of the management practices to reduce the harmful effects of chemical fertilizers and to protect soil and water resources is applying a combination of organic and chemical fertilizers that can better than using them separately. Therefore, in order to understand and identify the effectiveness of this management practice, it is necessary to examine runoff and sediment production. This study w...

2008
Magali Delmas Ivan Montiel

This article analyzes the factors that explain the international diffusion of voluntary international management standards. We argue that international management standards should not be analyzed in isolation but in conjunction with other standards and their institutional environment. We present two opposite views explaining how the previous diffusion of management standards facilitates or hamp...

2015
Qian Hao Furen Zhang Zeling Liu Lele Qin

Chemical industry is the fundamental strategic industry in national economy and one of pillar industries in China. A wealth of chemical industrial parks has been built one after another in many places, where lots of chemical enterprises are established. In the normal operation of those enterprises, their raw materials or products manufactured, transported and stored are usually featured by flam...

2010
MARIE BEDNAŘÍKOVÁ JAROSLAVA HYRŠLOVÁ

The paper focuses on the issues of health and safety management in chemical industry enterprises. First, the significance of health and safety management for chemical industry enterprises is presented, followed by approaches to this area, including the selected results that have been achieved since 1998 within European chemical industry. Attention is primarily paid to the occupational health pr...

ژورنال: پژوهش های خاک 2015
حسین خادمی, فاطمه خیامیم

کربن آلی خاک و ویژگی­های مرتبط با آن مهمترین شاخص­های شناخته شده کیفیت خاک هستند. علیرغم اهمیت کربن آلی خاک، تاکنون مطالعه جامعی در زمینه بررسی تغییرات کربن آلی در خاک­های استان اصفهان انجام نشده است لذا این مطالعه با هدف بررسی مهمترین عوامل مؤثر بر مقدار کربن آلی خاک­های استان اصفهان انجام شد. تعداد 248 نمونه خاک سطحی از کل استان اصفهان جمع­آوری شد. ویژگی­های خاک با روش­های استاندارد آزمایشگاه...

Journal: :iranian endodontic journal 0
zahed mohammadi zafer c cehreli sousan shalavi luciano giardino flavio palazzi saeed asgary

root resorption (rr) is defined as the loss of dental hard tissues because of clastic activity inside or outside of tooth the root. in the permanent dentition, rr is a pathologic event; if untreated, it might result in the premature loss of the affected tooth. several hypotheses have been suggested as the mechanisms of root resorption such as absence of the remnants of hertwig's epithelial root...

Journal: :Occupational and Environmental Medicine 2000

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