Increasing importance of pharmaceutical plants in the world and the presence of many of these plants in our country, which has one of the richest Flora of the world, suggest the need for comprehensive studies. Research of secondary metabolites of medicinal and essential oily plants from Iran’s dry to super dry deserts is very important. One of the most famous species from “Labiatae” family is D...

PURPOSE To identify and compare the phosphorylated lipids in normal and dry eye rabbit tears using matrix-assisted laser desorption/ionization time-of-flight mass spectrometry (MALDI-TOF MS). METHODS MALDI-TOF MS studies were performed on tear samples from normal and dry eyes of female New Zealand White rabbits. Experimental dry eye was induced by complete removal of the main and accessory la...

Body composition in developing animals has been extensively investigated in fish larvae and bird embryos. However, no studies to date have attempted to determine whole-animal body composition or lean body mass (MLB) in developing amphibians. The present study investigates how body composition changes during development in Xenopus laevis and the potential implications of MLB for substrate turnov...

OBJECTIVES This study evaluated the effect of incorporating increasing concentrations of sodium fluoride in incubation media, on the loss of dry mass and solubilization of collagen from demineralized dentin beams incubated for up to 7 days. The effect of fluoride on the inhibition of matrix-bound metalloproteinases (MMPs) was also measured. METHODS Dentin beams were completely demineralized i...

A new method of using the interference microscope is described which enables a continuous record to be obtained of changes in dry mass and concentration during the growth of a single tissue cell. The method has been applied to the analysis of changes of dry mass in the chro­ mosomes, spindle and cell-plate area during mitosis in endosperm. The results of these observations have been compared wi...

A sequestered fraction of myofibrillar magnesium presumably bound to thin filaments during polymerization of actin was used to determine myofibrillar mass in rat left ventricles and rabbit hearts. Myofibrillar volume was also determined by stereological measurements on electron micrographs of rat ventricles. Myafibrillar Mg (1.11 mmoles/kg dry ventricle) can be determined in glycerinated ventri...

We estimated the mass budget for mercury (Hg) seasonally deposited into the Florida Everglades and investigated seasonality of Hg cycling by analyzing data obtained for water, soil, flocculent detrital material (floc), periphyton, and mosquitofish collected throughout the Everglades freshwater marshes in the 2005 dry and wet seasons. Higher wet season total Hg (THg) in soil, floc, and periphyto...

The influence of the herbivorous snail (Physa sp.) on the algal periphyton community from the Gamasiyab River, Kermanshah province in western Iran was examined by establishing a gradient of Physa sp. density in artificial streams. The impact of Physa grazing was evaluated by measuring dry mass, ash-free dry mass (AFDM) and chlorophyll a in the periphyton community. Snails significantly depresse...

The factors a!ecting the uptake of 131I in Chinese white cabbage (Brassica Chinensis Linn) were studied. The time required for the ratio between the activity in the vegetable (Bq kg~1 dry mass) and the activity in the soil (Bq kg~1 dry mass) to reach equilibrium was around 72 h derived from an investigation period of 145 h. The ratio was also dependent on the mass of the vegetable (increased by...

A sequestered fraction of myofibrillar magnesium presumably bound to thin filaments during polymerization of actin was used to determine myofibrillar mass in rat left ventricles and rabbit hearts. Myofibrillar volume was also determined by stereological measurements on electron micrographs of rat ventricles. Myafibrillar Mg (1.11 mmoles/kg dry ventricle) can be determined in glycerinated ventri...