today's focus on marketing practices and activities of art-cultural business for growth and development of this business is of paramount importance. because the current (entrepreneurial) marketing model do not explain the marketing activities of such a business. this paper aims to provide a systematic and conceptual model of entrepreneurial marketing activities in the artistic and cultural...

lead, copper, cobalt, nickel, iron and zinc ions form monocitrate complexes (negative charge) in citrate solution which is absorbed on the citrate form of anion-exchange resins (citrate as counter ion) y exchange of citrate ion with citrate complexes. these are subsequently recovered from the resin by 0.5m ammonium citrate eluent at ph 2.0. under optimized conditions, quantitative recovery was ...

one of the main constraints in aloe vera production is poor information about optimum nutrients that are helpful for growth and production. the objective of this study was to optimize nutrient solution for aloe vera cultivation in soilless culture. therefore, to determine the best nutrients the experiment was conducted in a greenhouse during 2011 in the agricultural faculty, university of guila...

As the first step toward understanding the involvement of endogenous brassinosteroids (BRs) in cytodifferentiation, we analyzed biosynthetic activities of BRs in zinnia (Zinnia elegans L. cv Canary Bird) cells differentiating into tracheary elements. The results of feeding experiments suggested that both the early and late C6-oxidation pathways occur during tracheary element differentiation. Ga...

The recent discoveries of the importance of small amounts of boron, manganese, copper, and zinc (1, 2, 4, 7, 13) in the physiology of higher plants, and in a number of soil-plant problems of considerable agricultural importance, have added interest to studies on the role of these elements in plant nutrition. The mostobvious and important question is whether or not these elements are indispensab...