X-Ray Diffraction – The Magic Wand

This review paper covers one of the most important discoveries of the last century, viz. X-ray diffraction. It has made enormous contribution to chemistry, physics, engineering, materials science, crystallography and above all medical sciences. The review covers the history of X-rays detection and production, its uses/ applications. The scientific and medical community will forever be indebted to Röntgen for this invaluable discovery and to those who perfected its application...read more


Iqra Zubair Awan..

Dielectric Properties of MWNTs/HDPE Composites in Terahertz Region Studied with Reverse Effective Medium Approach

Optical properties of composites MWNTs/HDPE were explored by terahertz time-domain spectroscopy (THz-TDS). It was found that with the increasing of frequency from 0.4 to 2 THz the absorption coefficient increases gradually whereas the refractive index decreases. Furthermore, composites with thick MWNTs possesses larger absorption coefficient and index of refraction compared to that with the thin MWNTs at the same concentration. The dielectric properties of the MWNTs were extracted with reverse effective medium approach (REMA) from that of the composites. The results of the absorption coefficie..read more


Wang Zhenqiang, Chen Xiliang , Liu Wei..

New Synthesis of Solid-Solution Lead Hydroxyapatite (PbHAP) by Ceramic and Semi-Ceramic Methods

The synthesis of solid solutions lead hydroxyapatite, Pb10(PO4)6*y(OH)2, were successfully synthesized by solid-state reaction (ceramic method) (y= 0.95; 0.96; 0.97; 0.98; 0.99 and 1.00) and precipitation (semi ceramic method) (y= 0.97; 0.98; 0.99 and 1.00) methods at 800 ºC for 50 hours. The X-ray powder diffraction (DRON-3m diffractometer), electron microscopy scanning (SEM) and energy dispersive X-ray micro-analysis which characterized all samples. It has been established that Pb10(PO4)5.82(OH)2 and Pb10(PO4)5.88(OH)2 are the best synthesis for lead hydroxyapatite in the solid-state reactio..read more


Mohammed A.B. Abdul jabar and Ignatov A.V..

The Difference of Serum Protein Transport between Echinosides and Verbascoside

Verbascoside (VER) is the enzymatic hydrolysis product of echinacoside (ECH). The molecular structures of ECH and VER have different glucosyl groups so they bind to serum albumin in different ways, resulting in different pharmacological actions. In this report, we have examined the binding characteristics between human serum albumin (HSA) and ECH/VER by molecular modeling and spectroscopic approaches. Molecular modeling revealed that VER bound to HSA mainly through hydrogen bonds, van der Waals forces and hydrophobic forces. The spectroscopic results showed that the interactions between HSA an..read more


Ming Guo, Xiaoxue Zhao, Peter. E. Brodelius, Ling Fang,..

A 1H-Benzotriazole Derivative Nucleated Poly(L-lactic acid): Thermal Behavior and Physical Properties

In this study, a 1H-benzotriazole derivative, N, N'-bis(1H-benzotriazole) succinic acid acethydrazide (SABHA), was synthesized to nucleate Poly(L-lactic acid) (PLLA). A series of comparative studies on the melt-crystallization, the cold-crystallization, the melting behavior, the thermal stability, as well as the fluidity between the pure PLLA and PLLA/SABHA were performed. The melt-crystallization behavior revealed that the SABHA as a heterogeneous nucleating agent could significantly facilitate the crystallization of PLLA, and a larger amount of SABHA concentration exhibited the better nuclea..read more


Li-Sha Zhao and Yan-Hua Cai..

Application of Modified PANI-ZnO Composites for NH3Gas Sensor at Ambient Temperature

Polyaniline and zinc oxide nanoparticles were successfully synthesized through inverse emulsion polymerization method and hydrothermal method respectively. For ammonia gas sensing using LCR meter thin film of the composite was fabricated by using spin coater. The functional groups, morphological, optical, structural properties of zinc oxide nanoparticles, polyaniline (emeraldine salt) and composites were investigated by FTIR spectroscopy, Scanning electron microscopy (SEM), UV- Visible spectroscopy and XRD analysis. The formation of ZnO particles of different shapes in the nano range was confi..read more


Naimat Ullah, Anwar -Ul-Haq Ali Shah, Fazal Akbar Jan, ..

Investigation of the Magnetic and Electronic Properties of Copper Nanocluster Cu14 Contaminated with Fe, Ni and Co

We have presented density functional calculations of the electronic structures and magnetic properties of bimetallics nanoclusters Cu14-nMn (n=1-3) (M=Fe, Ni and Co) in the FCC crystal structure. For the calculations of the physical properties of the compounds, we have used the full potential linearized augmented plane wave method. The magnetic nature, semiconducting, half metallicity and metalloid of transition metals clusters in the FCC crystal structure are investigated. Results show that studied systems have ferromagnetic properties against Cu14Cluster. It is found that band gap of the clu..read more


Maryam Darvishpour, Mohammad Hossein Fekri..

Optimization of Ultrasound-Assisted Extraction of Polyphenols from Xanthoceras sorbifolia Husks and their Determination using HPLC

X. sorbifolia can be used as both food material and medicinal plant. In this study, ultrasound-assisted extraction (UAE) was firstly used to optimize the extraction process of total polyphenols from X. sorbifolia husks. Ultrasonic time, ultrasonic temperature, ratio of solvent to material and volume fraction of ethanol were investigated and optimized by orthogonal experiments. Then, High Performance Liquid Chromatography (HPLC) was applied to analyze the polyphenols of the extract under the optimal extraction process. The optimized results for UAE was 40 min of ultrasonic time, 40 ℃ of ultraso..read more


Xue Mei, Guoqian Li, Yong Lin, Bin Yuan, Ying Wei, Chun..

Sorption of Uranium (VI) Ions by a Sorbent Based on a Copolymer of Maleic Anhydride with Styrene Modified by N, N'-diphenylguanidine

In this paper the results of a study on the extraction and concentration of micro-quantities of uranium (VI) with a polymeric chelating sorbent with fragments of N, N 'diphenylguanidine is discussed. There was studied a static sorption capacity on K+ ions ((SSC = 9.3 mmol / g) and there were determined the ionization constants of ionogenic groups ( =3.97; =8.47) by potentiometric titration. The optimal conditions of the sorption of elements (pHopt, sorption time - τ, the influence of ionic strength - μ) were determined by the dependence of the sorption capacity (SC, mg/g) on the parameter be..read more


Fidan Bahmanova, Sevinj Hajiyeva, Elnara Alirzaeva, Naz..

Discrimination of Mungbean Cultivars/Varieties Based on Minor Saccharides Composition by HPLC Coupled with Multivariate Statistical Analysis

Present study reports the potential use of HPLC coupled with principle component analysis (PCA) and partial least squares discriminant analysis (PLSDA), for differentiation of approved mungbean variety from the promising lines based on minor saccharides profiles. A total of 48 mungbean samples from one approved variety and seven promising lines were analyzed for minor saccharides using HPLC and multivariate statistical analysis. PCA showed a clear separation among the classes. PLSDA was conducted to extract the variables that were responsible for the separation of mungbean approved variety fro..read more


Mudasir Majeed, Abdullah Ijaz Hussain, Shahzad Ali Shah..

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