background & aim: a. belladonna (family: solanaceae) is one of important pharmaceutical plants which contain tropane ‎alkaloids. tropane alkaloids are distinct group of secondary metabolites of the ‎solanaceae family.  the most important alkaloids of a. belladonna are atropine and hyoscine that are used extensively because of their medicinal properties. therefore identification and ‎determi...

Abstract Many regions of the world are facing mounting water stress as competition increases for this vital resource that may become scarcer under future climates. More is being allocated to our needs food, public supply, hydro-electric power and industrial goods support growing populations life-style expectations. To achieve this, less often retained water-dependent ecosystems. Environmental p...

background:  ramsar, a northern city in iran, lies on the coast of the caspian sea. this city has areas with some of the highest levels of natural radiation measured to date. the radon concentration in some areas of ramsar is up to 3700 bq m–3. on the other hand, due to high level of humidity, damp-proof barriers should be used in construction of new buildings in radon prone areas of this city....

Scale samples of Channa marulius were collected and studied for age determination and calculation of growth parameters. The fish were sampled from Harike Wetland during 1998 to 1999. Linear relationship with a high degree of correlation was observed between total fish length and the lateral scale radius. Age determination studies revealed 5 age groups. The harvestable size falls just below the ...

Secondary production of Chasmagnathus granulatus was calculated at the Refugio de Vida Silvestre Bahía Samborombón, Argentina (36 degrees 16' S and 57 degrees 06' W). Sampling was conducted on nine occasions between March 2001 and February 2003, crabs were collected by hand, physico-chemical variables, granulometry and organic matter contents of the sediments were registered. Crabs were classif...