background: during the last decades, the number of dentistry units increased significantly across the country. the aim of this study was to assess the efficiency of dental units of iran provinces regarding dental health inputs and outputs using data envelopment analysis approach. methods: in this applied descriptive-analytical study, the study population included all of iran 31 provinces. the o...

in this study, macrobenthic bivalves were identified at 12 stations located in four regions (markazi, shahr no, khalasi, and gabrik creeks). the relationships between density of bivalves and non-biological factors were examined, as well. sampling of sediments was done seasonally from autumn 2009 to summer 2010, by 0.04 m2 van veen grab, in three stations including mouth, middle and end of each ...

The experiment was aimed to study the chemical constituents of essential oils from two Pimpinella L. species including P. deverroides - Boiss, and P. tragium Vill. growing wild in Iran. To do this, the essential oil of fruits of two P. tragium populations (Sefidkhani and Hesar, Markazi province, Iran) and one population of P. deverroides (Kerend, Kermanshah province) were extracted by a Cleveng...

the experiment was aimed to study the chemical constituents of essential oils from two pimpinella l. species including p. deverroides - boiss, and p. tragium vill. growing wild in iran. to do this, the essential oil of fruits of two p. tragium populations (sefidkhani and hesar, markazi province, iran) and one population of p. deverroides (kerend, kermanshah province) were extracted by a cleveng...

with regard to the importance of technological developments, senior enterprise managers should be aware of their organization's technological capabilities, changes and developments in the world, and also have information from their rivals' efforts in achieving new technologies, to be in line of their organization's technology developments. therefore a technological needs assessment model, is de...

Introduction Actinomycetes can colonize surfaces of tools and equipment be transferred to meat products during manufacture, processing, handling, storage. Moreover, washing the does not eliminate microorganisms; it only spreads them. As a result, these opportunistic pathogens enter human body cause various infections. Therefore, aim current study was screen, identify, determine antibiotic susce...

     Forage production of rangelands differs during different times of grazing season and in the same month of different years. In range management projects, grazing capacity calculated once during the grazing season, which coincides with the maximum production of rangeland species. This may cause more livestock entry into the rangeland during the grazing season, leading to more degradation. Th...

This study was aimed to determine abundance and body distribution of PRM in laying hens of Arak. A total of 1400 laying hens were randomly examined from January to June 2008. Of those, 26 (92.86%) layer farms were found to be infested with Dermanyssus gallinae (39.3%). There was significant association between prevalence and climatic conditions of the region. The most common predilection site o...