نتایج جستجو برای: mineral base stock refining
تعداد نتایج: 420958 فیلتر نتایج به سال:
This study conducted a comparative analysis of two refiner plates that had different bar patterns. The were designed with three distinct zones, including the high-intensity zone, transition and low-intensity draft angle 4–5 degrees. significant difference in cutting edge length (CEL) approximately four times. Specifically, TMP plate A (TP A) CEL 5.1 km/s, while B B) 22.7 indicating TP applied g...
The present work explored the use of fatty acid ‘Triangle ester’ molecules (Epoxidized Ester (EE), and Thiirane (TE)) as antifriction antiwear additives at varying levels for Group I II mineral base oils using standard ASTMD-4172B four-ball test. Relative to neat oil, EE blends showed improved by ~61% ~42% properties ~32% ~41% in oils, respectively, while TE friction reduction ~65% ~40% wear ~9...
working capital management is one of the management structure of an organization that plays a fundamental role and also is as a major force in evolution of the organization. so it is important to acquire economic profits. this study investigates the relationship between working capital policy and profitability of companies in automobile, pharmaceutical and mineral industries in tehran stock exc...
(i) Stratiform, stratabound and tabular deposits of regular habit; (ii)Stratiform, stratabound and tabular deposits of irregular habit; (iii)Lenticular bodies of all dimensions including bodies occurring en echelon silicified linear zones of composite veins; (iv)Lenses, veins and pockets; stock-works, irregular shaped, modest to small size bodies; (v) Gemstone and raremetal pegmatites, reefs an...
We consider a system in which an order is placed every T periods to bring the inventory position up to the base stock S. We accept demand until the inventory position reaches a sales rejection threshold M. Our objective is to find the optimal values of S and M which minimize the long-run average cost per period. We establish the stationary distribution of our system and develop structural prope...
Consumption of vegetables is one of the most important ways of providing the body with mineral elements. However, it is not clear how mineral elements are distributed in different organs of vegetables, especially vegetables grown in greenhouses. The distribution of mineral elements in the root and leaves of greenhouse spinach was determined using synchrotron radiation XRF, the results indicated...
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