Effect of some fermentation factors on the production of Baker’s yeast from sweet sorghum stalks juice

The research aimed to study the possibility of using sweet sorghum juice as a substrate to produce Baker’s yeast and optimizing the temperature and agitation rate to obtain the highest biomass yield by batch method in beaker flasks then in laboratory fermenter.

Effect of Peanut Seeds Size and Plants Spraying with Bread Yeast (Saccaromyces sereviciae) on Biological Crop and Some Productivity Indicators

The research was carried out during 2015 and 2016 seasons at Arab El-Mulk village, Banias district, in Tartous Governorate, to study the effect of planting peanut seeds size (mixture, small, medium and large), and spraying plants with bread yeast (Saccaromyces serevisiae) concentration of (4%) in three treatments (control, once and twice), on biological yield (BY), Economic yield (EY) and some physiological indicators; yield index (YI), Harvest index (HI), crop index (CI) and seed index (SI). The experiment design was set as split plot in a randomized complete block with four replications. The seeds size considered the main factor, while spraying yeast allocated the sub plots. The results showed that seed size caused significant increases in all of the studied indicators. The large seeds gave better values of (BY) 210 g, (HI) 30.56%, (CI) 44.12%, (SI) 74.85 g, except (EY) compared with mix, small and med seeds. Also the results showed that there were no significant increase between mixture and medium seed size in (YE) and (HI), but there was a significant increase in (BY) and (SI), on the other hand the treatments; spray yeast for once and twice had significant increases compared to the control, and the twice yeast spraying gave better values (215.22 g ,63.98 g, 29.64%, 42.37 % and 73.45g ) of (BY , EY ,HI, CI and SI) respectively, compared to the control. The interaction between seeds size and bread yeast spraying caused a significant increase which achieved 15.78 % in (BY), 23.99 % in (EY), 9.74 in (HI), 13.68% in (CY) and 7.87g in (SI) compared to the interaction between untreated treatment and small seeds size.

تاثير إضافة خميرة الخبز (Sacharomyces cerevisiae ) لبعض مخلفات البقوليات في إنتاجية الفطر المحاري ( Pleurotus ostreatus)

the Search was conducted in General Commission for Scientific Agricultural Research in the Research Station Tartab / Research Center Qamishli / so as to determine the best substrate for the growth and production of Oyster Mushroom "Pleurotus ostreatus" To study the effect of adding different levels of bread yeast " Saccharomyces cerevisiae " for substrates used in the quantity and quality of production of the Oyster Mushroom.