considering its gobiidea and feeding fish sturgeon caspian sea highest main and the need to fecundity this fish, this study was done in babolroud and tajan rivers in mazandaran. in order to conduct the study, 197 sand goby we were caught using an electros choker machine (v300-200) in the spring of 1390 ,which was the spawning season, at the tajan river (sari) and babolrood (babol). 103 fish whi...

A 10 wk trial was conducted to investigate the effect of using ground, sterilized eggshell as a calcium source in the diet of laying hens. Egg production, egg and eggshell quality, hatching characteristics and eggshell ultrastructure were evaluated. A total of 144 hens aged 25 wk were housed in floor pens, located in a conventional open-sided layer shed. The birds were randomly divided into thr...

BACKGROUND Snail intermediate host control is a widely canvassed strategy for schistosomiasis control in endemic countries. While there have been increasing studies on the search for potent molluscicides in the past years, the use of nanoparticulate agents as molluscicides is yet to gain wide attention. The aim of this study was to assess the molluscicidal potential of curcumin-nisin poly lacti...

The research aims to study the force required break shell of duck eggs, which helps provide conditions for process hatching eggs and circulation. physical mechanical properties hade been measured. most important results were as follows: arithmetic mean length longest diameter 56.19, 42.94 mm, coefficient shape, surface area volume 0.77, 18071.11 mm 2, 16.0 mm3 , thickness eggshell from middle, ...

In addition, we are using the frog system to study size changes that occur during early development by preparing extracts from embryos at different stages. The fertilized egg is 1 mm in diameter in X. laevis, and undergoes rapid cleavages without growth so that the first ~4000 cells of the embryo are generated with minimal transcription or translation. I believe Xenopus will allow us to crack f...

Chiral calix[4]arenes bearing long tertiary alkyl groups at the upper rim and S-1-phenylethylamine groups at the lower rim can form heat-set gels and egg-like vesicles enantioselectively with d-2,3-dibenzoyltartaric acid in cyclohexane, which is the first example of heat-set gels resulting from difference in interactions between two component gelators: in addition, the diameter of vesicles decr...

Egg has valuable nutrients however; these may be affected by many factors. In this study, it was aimed to determine the effects of cage type, oviposition time and egg storage period on quality characteristics laying hens. A total 410 eggs were collected from unenriched enriched cages in morning afternoon. After weighed, they stored at 21oC 20% relative humidity until 30th day storage. It determ...

Since April 2010, a severe outbreak of duck viral infection, with egg drop, feed uptake decline and ovary-oviduct disease, has spread around the major duck-producing regions in China. A new virus, named BYD virus, was isolated in different areas, and a similar disease was reproduced in healthy egg-producing ducks, infecting with the isolated virus. The virus was re-isolated from the affected du...

Diapausing embryos of Austrofundulus limnaeus survive desiccating conditions by reducing evaporative water loss. Over 40% of diapause II embryos survive 113 days of exposure to 75.5% relative humidity. An early loss of water from the perivitelline space occurs during days 1-2, but thereafter, rates of water loss are reduced to near zero. No dehydration of the embryonic tissue is indicated based...

Reproductive timing, fecundity, and average egg sizes were examined for galatheoid and chirostyloid squat lobster collections from the Gulf of Mexico. While congeners did not always significantly differ in egg size or timing, each genus had a unique average egg diameter size which may indicate whether the developing embryos will be lecithotrophic or planktotrophic larvae. The eggs of Eumunidida...