background: freezing is a common way and one of the best methods of seafood preservation for long periods of time; however, the freeze thawing process may influence the quality of food. objectives: oxidation and denaturation of proteins, sublimation and recrystallization of ice crystals can cause changes in the quality of the frozen products. this study was aimed to evaluate the effect of three...

low temperature is one of main factors limiting distribution of woody plants. in order to evaluate the resistance of 4-years old seedlings and adult trees of maclura pomifera to freezing stress, a factorial experiment was carried out based on completely randomized design with three replications in the faculty of agriculture, university of tehran. during 2012-2013 sampling were done from the ann...

expression of htlv-i p19 protein in an escherichia coli expression system always leads to the formation of inclusion body. solubilisation and refolding of the inclusion bodies is complex, time consuming and difficult during large-scale preparation. this study aimed to express and purify a soluble form of recombinant htlv-i p19 protein in an e. coli expression system. the synthetic dna encoding ...

The present paper reports basic data on DNA content, protein content, and protein synthesis in Trituruspyrrhogaster embryos during development from cleavage to the hatching stage. Except for measurements of DNA and total protein contents, embryos were labeled with sodium carbonate-C for 10 h and fractionated into embryonic cell components, i.e. cytoplasmic mass, yolk and pigment granules, and n...

Cytochrome c, Biliprotein, Biosynthesis, Ecdysteroids, Insect Development Incorporation of [14C]5-aminolevulinate and [3H]leucine into cytochrome c, biliprotein and total soluble protein was followed from the last larval instar to the adult stage in Pieris brassicae. The titer of ecdysteroids during the pupal stage was determined with a radioimmunoassay to correlate synthesis of heme products a...

Ontogenetic changes in the protein phosphorylation/dephosphorylation systems in rat brain were investigated. It was found that the activity level of phospholipid-sensitive Ca2+-dependent protein kinase (PL-Ca-PK) in the particulate fraction of grey and white matter and the soluble fraction of grey matter increased rapidly and markedly after birth, reached the highest level at day 30, and declin...

The impact of three levels of sea salt (0.0, 8.0, and 16.0 mS/cm2) on six varieties of soybean (Crawford, G21, G22, G35, G82, and G83) was studied. Growth criteria, photosynthetic pigments, soluble sugars, soluble protein, free amino acids, free proline, and protein profile of soybean varieties were investigated under sea salt stress. Results of this study showed a considerable decrease in grow...

Salt tolerance of Pigeon pea (Cajanus cajan (L.) Millsp) was determined at three growth stages since it has already been observed by a number of workers that degree of salt tolerance of different crops varies with their ontogeny. Therefore, salt tolerance of three accessions, Local Arhar, ICPL-151 and ICPL-850014 of pigeon pea was assessed at germination, seedling and adult stage. It is clearly...