The essential oils obtained by hydrodistillation from the stem, leaf and flower of Phlomis aucheri Boiss., which is endemic to Iran, stem, leaf and root of Teucrium polium L. and solvent free microwave extraction oil from leaf of Ajuga chamaecistus Ging. subsp. chamaecistus were analyzed by GC and GC/MS. Germacrene D (11.1%, 28.3% and 21.1%) was the main constituent in the stem, leaf and flower...

As the use of online social networking (OSN) sites is increasing, data extraction from OSN profiles is providing researchers with a rich source of data. Data extraction is divided into non-automated and automated approaches. However, researchers face a variety of ethical challenges especially using automated data extraction approaches. In social networking, there has been a lack of research tha...

The essential oils obtained by hydrodistillation from the stem, leaf and flower of Phlomis aucheri Boiss., which is endemic to Iran, stem, leaf and root of Teucrium polium L. and solvent free microwave extraction oil from leaf of Ajuga chamaecistus Ging. subsp. chamaecistus were analyzed by GC and GC/MS. Germacrene D (11.1%, 28.3% and 21.1%) was the main constituent in the stem, leaf and flower...

The effect of histones on accessibility of DNA to DNase in chromatin of thymus nuclei has been studied by selective extraction of either lysine-rich or arginine-rich histones. It was found that all histones block accessibility but that, weight for weight, lysine-rich histones block much more effectively than do arginine-rich histones. We point to the contrast between accessibility of DNA to DNa...

A new method for the determination of trace copper(II) in food samples by Cloud Point Extraction(CPE) combined with Flame Atomic Absorption Spectrometry(FAAS) is presented and evaluated. The method is based on the fact that hydrophobic complex of copper(II) with sodium diethyldithiocarbamate (DDTC) was formed at pH 6.0 and subsequently the hydrophobic complex was extracted into surfactant-r...

Polygalacturonase is one of the important enzymes used in various industries such as food, detergent, pharmaceutical, textile, pulp and paper. A novel liquid/liquid extraction process composed of surfactant and acetonitrile was employed for the first time to purify polygalacturonase from Durio zibethinus. The influences of different parameters such as type and concentration of surfactants, conc...

Ciênc. Tecnol. Aliment., Campinas, 21(1): 10-13, jan.-abr. 2001 1 Recebido para publicação em 11/09/98. Aceito para publicação em 30/06/00. 2 Jahan Vegetable Oil Co., Research Department. 16 Daman Afshar st., wali-Assr Ave., Above wanak sq. Tehran 19697, Iran. SUMMARY Spent nickel catalyst (SNC) has the potential of insulting the quality of the environment in a number of ways. Its disposal has ...

For accurate quantification of DNA and RNA from environmental samples, yield loss during nucleic acid purification has to be minimized. Quantitative PCR (qPCR) and reverse transcription (RT)-qPCR require a trade-off between maximizing yield and removing inhibitors. We compared DNA and RNA yield and suitability for quantitative SYBR Green PCR and RT-PCR using the UltraClean and PowerSoil extract...

<p class="abstract"><strong>Background: </strong>The study aimed to compare the clinical efficacy of platelet rich plasma (PRP) and fibrin (PRF) used with phosphosilicate putty during immediate post extraction implant placement loading.</p><p class="abstract"><strong>Methods:</strong> A prospective comparative was conducted on 20 adults. Two groups were...

Cold seep communities with distinctive chemoautotrophic fauna occur where hydrocarbon-rich fluids escape from the seabed. We describe community composition, population densities, spatial extent, and within-region variability of epifaunal communities at methane-rich cold seep sites on the Hikurangi Margin, New Zealand. Using data from towed camera transects, we match observations to information ...