cyanobacteria have been considered due to producuction of types of secondary metabolites and antimicrobial compounds. this research designated for optimization of bg11 culture medium to increase the antifungal activity of cyanobacterium sp. pgu1 against the plant pathogenic fungi, fusarium oxysporum f. sp lycopersici and rhizoctonia solaniag2-2-iiib. cyanobacterium was isolated from the persian...

Ammonium concentrations of 1 lM are commonly cited as being the threshold for inhibition of NO3 uptake, but the applicability of this threshold to phytoplankton from di€erent taxonomic classes has rarely been examined. Additionally, little is known about the in ̄uence of environmental variables (e.g. growth temperature) on the interaction between ambient NH4 and NO ÿ 3 uptake. Four species of es...

to investigate the effects of methyl jasmonate growth regulators on growth characteristics, fruit number and fruit yield of ‘semsuri’ melon, an experiment at the field of shahid bahonar university was conducted in summer 2012. melon (cv. ‘semsuri’) is widely cultivated in iran and therefore increasing the fruit yield and quality of this cultivar is necessary. some growth regulators including me...

due to high antagonistic activity of trichoderma harizanum, 5 isolates t.h.k, t.h.bi, t.h.mo, var33 and torbat vi were selected and their efficacy was studied for controlling sugar beet damping-off caused by rhizoctonia solani, under in vitro and in vivo conditions.  antagonistic ability of t. harzianum isolates was investigated as dual culture on pda in concomitant and sequential cultures, 48 ...

Effectiveness of furfural as an organic inhibitor in 5 percent hydrochloric acid which is used in acid pickling of steel was evaluated. Lungmuir, Frumkin and Flory-Huggins isotherms [1, 2] were used to determine the parameters of effective adsorption, free energy and entropy of adsorption. Furfural indicated an inhibition less than 17 percent in concentrations of 0.001 mole per liter for a dura...

introduction: for thousands of years, plants have been used as the main source of drug worldwide. recently, it has been found out that the plant artemisia annua and especially its derivatives such as artemether have anticancer properties. methods: in this study, the anticancer effect of artemether on mcf-7 breast cancer cell line was examined. mtt assay was used to assess the viability of cance...