The migration of dislocations affects many material properties including deformation, plasticity and electronic properties. In order to understand the mechanism of the motion of dislocations, both experimental and theoretical studies have been performed [1]. It is known that full dislocations such as edge or screw dislocations can dissociate into Shockley partial dislocations, which have higher...

Let A and B be n × m matrices. The matrix B is said to be g-row majorized (respectively g-column majorized) by A, if every row (respectively column) of B, is g-majorized by the corresponding row (respectively column) of A. In this paper all kinds of g-majorization are studied on Mn,m, and the possible structure of their linear preservers will be found. Also all linear operators T : Mn,m ---> Mn...

the accurate prediction of protein stability is one of the most challenging goals in protein formulation and delivery. in this study, a gradient rp-hplc method is described for the separation of human growth hormone (hgh) variants as deamidated and oxidized forms. the methodology employed a polymeric poly (styrene-co-divinylbenzene) column and a 1ml/min flow rate of a linear gradient of 0.1% v/...

iranian castor bean lectin was isolated and purified by several column chromatography methods. then, the sugar and amino acid content of the purified lectin was identified. castor bean lectin has some anti tumor and anti leukemia action. thus it may be used commercially for medical and biochemical purposes.

introduction:surgical treatment of diseases in cervicothoracic, thoracic and thoracolumbar regions can be a challenging issue. cooperation of the thoracic surgeons and spine surgeons can improve the outcomes and decrease the complications of patients who underwent these approaches.materials & methods: the participants of this study consisted of seventeenpatients suffering from different types o...

metal forming processes, compared with machining ones, reduce production steps and increasemanufacturing speed in addition to saving raw material. in this paper, forming process of column ofa steering mechanism is investigated by finite element analyses and experimental tests; andoptimum die design parameters are found. forming process parameters including die opening angle,bearing length, clea...

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We observe that, in real-world distributed data warehouse systems, data columns from different sources often exhibit redundancy. Even though these systems can employ both general and column-oriented compression schemes to reduce the data storage pressure, such crosscolumn redundancy (CCR) is not recognized or exploited effectively. Therefore, we propose Cuttle, a column storage system that enab...

influence of soil organic matter (som) on the adsorption, desorption and transport of polycyclic aromatic hydrocarbons (pahs) has already been given full investigation in soils. in this paper, confocal laser scanning microscope (clsm) was used to elucidate aqueous leaching of pahs in different types of soil with soil columns, which enhanced understanding on transport of pahs appreciably. four ...

the simulation of distillation columns is an essential step in design, optimization, and rating. in this paper, a new procedure has been proposed for the initial estimation of column profiles based on modified kremser’s group method for simple and/or complex columns. the effect of this initialization algorithm on simulation procedure has been studied through two examples. the results show signi...