Subsequent to phytochemical investigation on scutellaria lateriflora (Labiatae) from Mazandaran provincein Iran, the wax ester fraction of the leaves has been investigated. Using TLC, CC GLC and GLC-MS, the alkyl esters of the epicuticular wax was analysed. Total concentration of the esters was 35% and it was shown to be composed of a homologous series having various chain lengths in the ra...

Background and Objectives: Essential oils are very complex mixture of components and their composition may vary in different species or varieties or even within the same variety. Origanum vulgare L. subsp. vulgare is one of the most distributed subspecies within the genus Origanum and has been found to be a poor-oil, categorized in cymyl, bornane or sabinyl chemotypes...

to study the effect of sowing date and a single irrigation (si) on yield and yield components of barley, a field experiment was conducted in dryland agricultural research institute (maragheh, iran) in 2004-06 cropping seasons, using a split plot based on a randomized complete block design with 3 replications. main plots were assigned to 3 levels of sowing date (early, normal and late). sub-plot...

the present study attempts to analyze the evaluation of the central district of ravansar township rural community from the performance of village administrations (dehyari) by using of structural equation modeling (sem). in order to collect needed data, a questionnaire was designed and completed via interviewing the sample population. the observed variables for economical, socio-cultural, servic...

This paper proposes a method for extracting sub-images from a huge reference image by using learnt lifting wavelet filters. Lifting wavelet filters are biorthogonal wavelet filters containing free parameters developed by Sweldens. Our method is to learn such free parameters using some training sub-images so as to vanish their high frequency components. The learnt wavelet filters have the featur...

Haemoglobins of chicks, yearlings and known-age sub-adults of the royal penguin were investigated by starch-gel electrophoresis at pH 8-6. Two haemoglobin components were observed in yearlings and sub-adults. These were assumed to be the haemoglobins of adults. Another three haemoglobin components were observed in 3-week-old chicks. In seven out of eight fledging chicks, these chick haemoglobin...

For high-dimensional data of low sample size it is difficult to compute principal components in a robust way. We mention an algorithm which is highly precise and fast to compute. The robust principal components are used to compute distances of the observations in the (sub-)space of the principal components and distances to this (sub-)space. Both distance measures retain valuable information abo...

Several studies on photovoltaic systems focused on how it operates and energy required in operating it. Little attention is paid on its configurations, modeling of mean time to system failure, availability, cost benefit and comparisons of parallel and series–parallel designs. In this research work, four system configurations were studied. Configuration I consists of two sub-components arranged ...