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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…
Azza H. Rageh, Salwa R. El-Shaboury, Gamal A. Saleh, Fardous A. Mohamed
A simple, accurate and precise spectrophotometric method has been proposed for the determination of eleven cephalosporins, namely; cefaclor monohydrate, cefadroxil monohydrate, cefalexin anhydrous, cefradine anhydrous, cefotaxime sodium, cefoperazone sodium,…
Dina M. Fouad, Ahmed Bayoumi, Mohamed A. ElGahami, Said A. Ibrahim, Abbas M. Hammam
A series of new mixed ligand complexes of cobalt(II), nickel(II), copper(II) and cadmium(II) have been synthesized with 3benzyl1H4[(2 methoxybenzylidine) amino]1, 2, 4triazole5 thione (MBT), 3bezyl1H4[(4chlorobenzylidine) amino]1, 2, 4triazole5thione (CBT), 3…
Soichiro Murakami, Yuuta Akutsu, Shigeki Habaue, Osamu Haba, Hideyuki Higashimura
The oxidative coupling polymerization of p alkoxyphenols with Mn(acac)2ethylenediamine catalysts was carried out. The polymerization of pmethoxyphenol with the manganese(II) acetylacetonate [Mn(acac)2]N,N’diethylethylene diamine catalyst in CH2Cl2 at room tem…
Samir A. AbdelLatif, Saber E. Mansour, Abdulrahman A. Fatouh
A new 3methyl1phenyl4arylazo5pyrazolone and 1, 3diphenyl4arylazo5pyrazolone have been synthesized and characterized by elemental analysis, IR, mass and 1H NMR spectra. The acid dissociation constants (pKa values) of the investigated ligands were determined po…
Mohammad Tayseer Kayed AlTamimi
When I put Kepler’s first law under peer review, I note: 1) There is an isolation cordon between daytime and night = 13.88 m; 2) Earth’s Rotation Axis loses its tendency to its mother (Polaris now) in winter; 3) Celestial’s equator doesn’t parallel Earth’s eq…
Chunquan Fu, Hongliang Zhou, Hongjun Yin, Huiying Zhong, Haimei Jiang
A finite volume method for the numerical solution of viscoelastic flows is given. The flow of a differential upper-convected Maxwell (UCM) fluid through a contraction channel has been chosen as a prototype example. The conservation and constitutive equations…
Hans O. Åkerstedt, Sofie M. Högberg, T. Staffan Lundström, Thomas Sandström
The deposition of spherical nanoparticles by convection and Brownian diffusion in a pipe with a cartilaginous ring structure is studied. Analytical results for a fully developed flow are found for small amplitude rings using the interactive boundary layer the…
JinTae Kim, JaeHa Choi, DeukYong Lee
Hyaluronic acid hydrogels (HAHs) were synthesized by immersing the microbeads in phosphate buffered saline solution to assess short term biocompatibility of the gels by means of the rabbit pyrogen test and the bacterial endotoxin test. The rise in body temper…
Sami M. ALJaber
Recent interest in problems in higher space di mensions is becoming increasingly important and attracted the attention of many investigators in variety of fields in physics. In this paper, the electrostatic energy of two geometries (a charged spherical shell…
Pablo Collins
In order to evaluate the influence of stressed environments on hepatopancreatic cells of fre- shwater prawns, Macrobachium borellii Nobili, 1896 and Palaemonetes argentinus Nobili 1901, (Crustacea, Decapoda, Palaemonidae) were collected at three different aqu…
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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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