background and objectives: the chemical composition and antimicrobial activity of bitter orange (citrus aurantium) leaf, ripe and unripe peel essential oils, cultivated in southwest of iran, were investigated. materials and methods: the analysis of chemical composition of hydro-distilled essential oils was carried out by gc-ms. the disc diffusion and broth micro-dilution were used to assay the ...

abstract to evaluate the effect of different sources of p fertilizer on grain yield and yield components of two barely varieties, this experiment was conducted in research farm, college of agriculture, university of tehran in 2010. the experimental treatments were arranged as factorial based on randomized complete block design with three replications. the treatments consisted of two barely vari...

in order to study the effects of different nutrition systems (organic, chemical and integrated) and biofertilizer (pgpr) on phenology period, grain yield and its component in sunflower (helianthus annuus l.) an experiment was conducted using alestar cultivar at the research farm of college of agriculture, tarbiat modares university in 2007. five levels of nutrition systems including f1 (100% or...

the essential oil from the seeds of cuminum cyminum l. was isolated by hydrodistillation method and the chemical composition was determined by gas chromatography-mass spectrometry (gc/ms). the yield of the oil was found to be 3.0% (on dry weight basis). a total of twenty six components, representing 96.7% of the oil were identified. cuminaldehyde (49.4%), p-cymene (17.4%), b-pinene (6.3%), a-ter...

Rapid and reliable detection and identification of unknown chemical substances are critical to homeland security. It is challenging to identify chemical components from a wide range of explosives. There are two key steps involved. One is a non-destructive and informative spectroscopic technique for data acquisition. The other is an associated library of reference features along with a computati...

abstract: due to the importance of essential oils and their use in various industries, the essential oils of four types of citrus consisting of orange (c. sinesis), tangerine (c. reticulate), sweet lemon (c. limetta) and sour lemon (c. limon) were extracted and subjected to chemical analysis to identify and evaluate the chemical constituents of the oils. the average essential oils of orange, ta...

Objective: To analyze the chemical components of prostatic calculi. Method: An infrared automatic analyzer was used to determine the chemical components of prostatic calculi from 86 patients, and the causes of formation and related clinical data were examined. Results: Magnesium ammonium phosphate and carbapatite were found in 84.9% of calculi, and the difference in the comparison with urinary ...