Search published articles


Showing 3 results for Zahraei


Volume 3, Issue 3 ((Articles in Persian) 2012)
Abstract

The subject of the grammatical category VID in Russian language and its equivalent “verbal representation” in Persian Language is of special importance. Each of these languages, as per its own structural and linguistic features, employs specific media of expression. Actually, the category of aspect does exist in every language. In fact, all concepts and meanings originate from within the human mind that, in order to manifest such concepts in the form of language, utilizes plentiful of linguistic structures specific to its own implicit and explicit attributes.  That is why linguists believe that such structure does exist generally in all languages of the world with the only difference in their medium of expression (grammatical and non-grammatical) and the concept and meaning they convey. The results of the comparative studies conducted in the field of “verbal representation” in Persian and Russian languages reveal that the major difference is in their method of expression. The current research is an attempt to study the subject of verbal representation in Russian and Persian languages through the practice of imperfect verbal representation.  
Z.s. Seyedi , Z. Zahraei , F. Jookar Kashi ,
Volume 10, Issue 1 (Winter 2019)
Abstract

Aims: The dyes are high usage chemical compounds in textile industry. Discharge of colored effluent to the water sources, effect on the unpleasant appearance and the solubility of gases. The dyes reduce light penetration to the lower layers of water and photosynthetic activity. They caused cancers and variety of mutations. In this research, the decolorization ability of Reactive Red 152 dye by isolated strains from textile wastewater was measured, also environmental conditions were optimized.
Materials and Methods: In this experimental study, the bacterial strains were isolated from samples collected from different parts of textile wastewater. The dye decolorizing bacteria were screened. The decolorization ability of the strains was evaluated under different conditions such as incubation time from 0 to 72 hours, pH 6 to 9, different dye concentrations from 50 to 400mg/l and different carbon sources.
Findings: Ten strains were isolated from Kashan textile wastewater that 4 strains showed high ability in decolorization. The highest decolorization was observed after 48 hours, pH=9, 50mg/l concentration of dye and glucose as carbon source.
Conclusion: Textile wastewater contains bacterial strains which have high decolorization ability. Therefore, we can use these bacteria for decolorization of wastewater dyes.

Volume 12, Issue 4 (Number 4 - 2010)
Abstract

The effects of various methods of probiotic administration in hatchery and on prevention of Salmonella enteritidis (Se) in broiler chicks was investigated. A total of 150 Salmonella free day old chicks (Ross 308) were assigned to five experimental groups including control and four in-hatchery probiotic administration method groups comprised of: in ovo injection, oral gavage, spray and vent lip application. Each group was comprized of 30 chicks. The chicks were challenged by 8 Log CFU Se using oral gavage on 2 days of age. At 1 and 7 days of post-challenge (PC) 15 birds per experimental group were sampled for Se recovery through either one of culture or culture based PCR techniques. Administration of probiotics reduced the number of Se colonized chicks, compared with control as evaluated through either culture or PCR method. These reductions were significant for all the administration routes (P< 0.05), except for the 1 day PC, evaluated by culture method (P> 0.05). Furthermore probiotics were capable of reducing the number of colonized chicks from day 1 to day 7 PC. Vent lip method was evaluated as the most effective route of probiotic administration in prevention of Se colonization, not significantly different from either spray application in day 1 of PC group or from other administration methods in the day of 7 PC (P> 0.05). PCR method was more reponsive in detection of Se as compared to traditional culture method. Administration of probiotics in hatchery finally resulted in reducing the colonization of Salmonella in the alimentary tract of chicks.

Page 1 from 1