background and objectives : streptokinase is used clinically as an intravenous thrombolytic agent for the treatment of acute myocardial infarction and is commonly prepared from cultures of streptococcus equisimilis strain h46a. the objective of the present study was the production of streptokinase from strain h46a and purification by chemical reduction method. materials and methods: the rate of...

he careless application of technology and poor planning have had deteriorating effects on the economy, agricultural production and social structure in iran. the country, where the exportation of excess agricultural production brought a major portion of her income some 20 years ago, had to import more than 75 per cent of the food needs of her prople in recent years. some national plans or major ...

quantitative analysis of production through evaluation of inputs consumption quantity is of main principles in agricultural policies, which is followed by increasing in production through optimal use of resources. this study has been conducted to estimate different types of production functions in mechanized farms of broiler chicks located in gorgan city. cross-section survey data were gathered...

the first experimental sam for iran was constructed more than three decades ago under the supervision of prof. pyatt. based on this work prof pyatt had observed that the way in which iran was spending oil revenues was likely to exacerbate urban—rural income differentials in iran. in his approach to sam he did not distinguish between factorial and institutional income distributions preferring to...

Saline soils occupy about 7% of the earth land surface, an extent portion of such soil are not arable due to very high level of salinity. The objectives of this study were to obtain information about the effect of salt content of irrigated water on growth, anatomical changes and alkaloid production in pomegranate trees. The result reported that, salinity of the irrigated water, with 800, 1200, ...

We aim at contributing to the debate on the mechanisms and properties of economic fluctuations. We consider a crucial aspect among many thought to influence this ubiquitous and extremely relevant phenomenon: the interaction structure that characterises the organisation of production, that is, the production relation among sectors of a system. We build — and simulate — a very simple model repres...