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Natural Science is an international journal dedicated to the latest advancements in natural sciences. The goal of this journal is to provide a platform for scientists and academicians all over the world to promote, share, and discuss various new issues and developments in different areas of natural sciences. All manus…
Eman Fathi Sharaf, Khadijah Al-Fadel
The previously optimized crude alkaline protease from the haloalkaliphilic Bacillus circulans L. was partially purified using ammonium sulphate fractionation and dialysis. The best specific ac tivity (27.7 U/mg protein) was obtained at 80% sa turation. The op…
Hani Alnawafleh, Khalid Tarawneh, Rami Alrawashdeh
This work discusses status of the geologic and economic potentials of minerals and industrial rocks in Jordan. The major mineral resources are presented in details and the paper is designed to cover the lack of published data in this field. Geologically, the…
Sarbaz H. A. Khoshnaw
We study kinetic models of reversible enzyme reactions and compare two techniques for analytic approximate solutions of the model. Analytic approximate solutions of non-linear reaction equations for reversible enzyme reactions are calculated using the Homotop…
Hanene Miladi, Rihab Ben Slama, Donia Mili, Sami Zouari, Amina Bakhrouf, Emna Ammar
The essential oil composition of Thymus vulgaris L. and Rosmarinus officinalis L. endemic to France were determined by GC and GC-MS. Oils were assessed for their cytotoxic, antioxidant and antimicrobial activity. 31 and 37 different compounds were identified…
Janin A. Khaleel, Chunhong Gong, Yanfeng Zhang, Ruimin Tan, Thomas C. Squier, Hongjun Jin
A putative chromate ion binding site was identified proximal to a rigidly bound FMN from electron densities in the crystal structure of the quinone reductase from Gluconacetobacter hansenii (Gh-ChrR) (3s2y.pdb). To clarify the location of the chromate binding…
Renchuan You, Ying Zhang, Yu Liu, Guiyang Liu, Mingzhong Li
Establishing an appropriate degradation rate is critical for tissue engineering scaffolds. In this study, the degradation rate of silk fibroin three-dimensional scaffolds was regulated by changing the molecular weight (MW) of the silk fibroin. The solubility…
Bhawana Agarwal, Brajesh S. Katiyar
An alkalophilc and thermophilic Bacillus sp. BHA that produced a thermostable alkaline protease was isolated from decaying protein substrates. The isolate was found to grow in pH range 7 - 11 with an optimum pH 9.0 and temperature up to 55 ℃ . The activity of…
Andrey N. Volobuev, Peter I. Romanchuk, Vladimir K. Malishev
On the basis of the Hardy-Weinberg law written down for a continuous scale of alternation of generations, populating dynamics of genome is considered at absence of mutagen influence and at presence of the mutagen factor of stochastic character. Influence of t…
Shoor Vir Singh, Ajay Vir Singh, Avnish Kumar, Pravin Kumar Singh, Rajib Deb, Amit Kumar Verma, Amit Kumar, Ruchi Tiwari, Sandip Chakraborty, Kuldeep Dhama
Mycobacterium avium subsp. paratuberculosis causes chronic inflammation of the intestine known as Johne’s disease (JD) in domestic and wild ruminants including primates. MAP has also been associated with inflammatory bowel disease (IBD) so called Crohn’s dise…
Тatiana А. Mikhailova, Оlga V. Shergina, Olga V. Kalugina
In the urbanized territory (the Irkutsk city), the content of sulfur and heavy metals (lead, cadmium, copper, zinc) in soil profile horizons and leaves (needles) arboreal plants were studied. High accumulation of polluting elements in pine and larch needles,…
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Natural Science is an international journal dedicated to the latest advancements in natural sciences. The goal of this journal is to provide a platform for scientists and academicians all over the world to promote, share, and discuss various new issues and developments in different areas of natural sciences. All manus… All articles are open access under a CC BY 4.0 licence, with authors retaining copyright.
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