this research work is devoted to the investigation on the use of silica on the fatigue-to-failure property of a tire tread compound. a reference compound was frst designed in which 60 phr carbon black was used as the reinforcing fller. while keeping the total of fller content to be constant as 60 phr, three additional compounds with 5, 10 and 20 phr silica were then manufactured. the classical ...

black stem is one of the most important fungal diseases of sunflower which is caused by phoma macdonaldii. this research was conducted to clarify the interactions between a few breeder lines and wild-type accessions of sunflower with seven isolates of phoma macdonaldii, the causal agent, under controlled conditions. the experiment was carried out in randomized complete block design with three r...

the effect of european black alder (alnus glutinosa l.) on the contents of carbon and nitrogen,exchangeable base cations, and plant available forms of phosphorus in the reclaimed mine soils formed bywaste deposition from opencast lignite mines was researched in central serbia. it was concluded that thegreatest part of dead organic residues reaching the soil under european black alder monocultur...

commercial utilization of black mouth croaker (atrobucca nibe) is in progress in iran. this study was carried out to assess the physicochemical and sensory evaluation of minced fish and surimi prepared from small size of a. nibe, which is not common for human consumption. the surimi proximate composition contains protein (14.77±0.506%), lipid (0.94±0.081%), ash (0.58±0.007%) contents and yield ...

microwave-assisted hydrodistillation (mahd) at three levels of microwave power (180, 360, and 540 w) and the traditional hydrodistillation (hd) were applied to obtain essential oils from bunium persicum boiss. (black zira). mahd at 540 w started much earlier than that of hd (4 min vs. 38 min, respectively). by the time the extraction of essential oils started with hd, almost 50% of the total es...

gradual increase of the earth's surface temperature can cause many significant changes on the climate of our planet. this problem is progressively increasing. one of the main reasons for this phenomenon is the absorption of the sun's energy and lack of proper reflection of emissions due to man-made activities, one of which is the increase in black surfaces. in this descriptive and cross-section...

by extending wireless networks and because of their different nature, some attacks appear in these networks which did not exist in wired networks. security is a serious challenge for actual implementation in wireless networks. due to lack of the fixed infrastructure and also because of security holes in routing protocols in mobile ad hoc networks, these networks are not protected against attack...

Gradual increase of the Earth's surface temperature can cause many significant changes on the climate of our planet. This problem is progressively increasing. One of the main reasons for this phenomenon is the absorption of the Sun's energy and lack of proper reflection of emissions due to man-made activities, one of which is the increase in black surfaces. In this descriptive and cross-sectio...

In this study, we investigated the relationship between the genetic polymorphism of growth differentiation factor 9 (GDF9) genes and the litter size in 384 individuals of five breeds of black goats. Four pairs of primers were designed to detect single nucleotide polymorphism of GDF9 gene in goats by PCR-SSCP. The least square was used to analyze the relation between different genotypes and the ...