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Six fish species-Cirrhinus mrigala (Morakhi), Labeo rohita (Danbhro), Catla catla (Thalli), Wallago attu (Jarko), Ctenopharyngodon idella (Grass), and Cyprimus carpio (Gulfam)--commonly found in the Pakistani Indus river, were selected for fat and cholesterol evaluation. Fat content was quantified by the Folch method and cholesterol content was determined by a simple GC method. The application of the proposed method to quantify cholesterol content revealed variations among the six breeds evaluated. The breeds studied contained 0.80-1.95% fat, indicating that all investigated fishes were lean; significant variation was found in cholesterol content, and ranged between 72 and 392 mg/100 g. Standard addition analyses showed that the method was accurate, as the recovery of cholesterol varied from 95 to 103%, with a coefficient of variance not more than 5.6%. The results showed that, after the development of suitable calibration, within 11 min, the cholesterol could be accurately determined by GC. 相似文献
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An efficient method for calculating the Lagrange multipliers and the analytical gradients of one state included in a state average MCSCF wave function is presented. It is demonstrated that the state average energy of an ‘equal-weight’ scheme is invariant to rotations within the state average subspace and that the corresponding rotations should be eliminated from the Lagrangian equations. Finally, a diagnostic is presented, which gauges the energy difference between a state defined by a state average calculation and the corresponding fully variational multi-configurational SCF state. 相似文献
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Siddiqui Samia Nafady Ayman El-Sagher Hussein M. Al-Saeedi Sameerah I. Alsalme Ali M. Sirajuddin Talpur Farah N. Sherazi Syed Tufail H. Kalhoro Muhammad S. Shah Muhammad R. Shaikh Tayyaba Arain Munazza Bhargava Suresh K. 《Journal of Solid State Electrochemistry》2019,23(7):2073-2083
Journal of Solid State Electrochemistry - Bimetallic nanoparticles (BMNPs) have received considerable attention due to their distinctive properties when compared to the corresponding monometallic... 相似文献
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Glutaric Acid Assisted Fabrication of CuO Nanostructures and their Application in Development of Highly Sensitive Electrochemical Sensor System for Carbamates 下载免费PDF全文
Razium Ali Soomro Keith Richard Hallam Zafar Hussain Ibupoto Aneela Tahira Syed Tufail Hussain Sherazi Siraj Juddin Sana Jawaid Magnus Willander 《Electroanalysis》2016,28(7):1634-1640
This work describes the fabrication of unique arrow head shaped CuO nanostructures using simple hydrothermal treatment method. The highly attractive features were obtained by the application of glutaric acid utilised simultaneous as template and functionalising agent. The functionalised nanostructures were known to possess excellent potential towards the electro‐catalytic oxidation of carbofuran pesticide. The generated intense electrochemical signal with lower potential value enabled sensitive and selective determination of carbofuran up to 1×10?3 µM with wide sensing window in range of 0.01 to 0.16 µM. The feasibility of the developed sensor system for the practical application was also studied by testing its potential in real sample extracts of various vegetables. The excellent recoveries demonstrated the analytical robustness of the developed sensor system. The sensor system utilises a new and simple approach towards sensitive determination of toxic pesticides reflecting its wide spectrum application in various fields. 相似文献
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ChemInform Abstract: X-Ray Structural Studies of the Polymorphic Elpasolites K2LiAlF6 and Rb2LiGaF6.
ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option. 相似文献
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Naeem A. Memon Ayaz A. Memon Fakhar N. Memon Sayed Tufail Hussain Sherazi Shahabuddin Memon Muhammad K. Leghari 《Chromatographia》2018,81(10):1373-1380
Mesoporous materials are described by their relatively high surface areas and pore volumes. They possess uniform channels within nanometer range. These materials have numerous applications in catalysis, separation and many other fields. The qualitative and quantitative determination of antibiotic drugs, i.e., ciprofloxacin and cefixime has clinical and analytical importance due to their broad spectrum of antimicrobial activity and stability. Both antibiotic drugs are orally active and have excellent activity against different pathogens. It is for the first time that we have developed an analytical method for the simultaneous analyses of both drugs using a newly developed p-morpholinomethylcalix[4]arene (p-MC4) mesoporous silica-based HPLC column (15?×?3 mm I.D.). Furthermore, separation of these two components was carried out using isocratic elution of methanol and 0.1% aqueous formic acid (70:30 v/v) with flow rate of 1 ml min?1 at retention time of 2.71 and 4.21 min and retention factor 1.85 and 1.19 for ciprofloxacin and cefixime, respectively; while total run time was 5 min. The developed method was repeatable with a relative standard deviation (RSD) of 0.90–2.08% for antibiotic drugs. The limits of detection and quantification of ciprofloxacin and cefixime were obtained within the range of 0.152–0.801 and 0.40–1.23 µg mL?1, respectively. The method is highly applicable, rapid, simple, very reproducible and accurate for the separation and determination of antibiotic drugs. 相似文献
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The thin-film spinel-forming solid state reaction between Al2O3 and MgO has been studied under initially non-coherent conditions. MgO films in (001) orientation on
-cut sapphire single crystals were heated at 1100°C for 30 min or 1h. The film/substrate reaction proceeds via cation counterdiffusion as was revealed by a marker experiment. The MgAl2O4 films formed were predominantly (001) oriented, with an additional systematic tilt of about 5° of the spinel lattice around the [010] axis. The structure of the Al2O3
/MgAl2O4(001) and MgAl2O4(001)/MgO(001) reaction fronts has been investigated on cross section samples by high-resolution electron microscopy. It appeared that after starting from an incoherent interface, the Al2O3
/MgAl2O4(001) front assumes an almost fully coherent structure during the reaction. As a result the lattice misfit is reduced to 1%, and interfacial ledges are formed. The latter most probably play an active role in the necessary c.p.h. f.c.c. reconstruction of the oxygen sublattice. The MgAl2O4(001)/MgO(001) reaction front consists of coherent regions divided by misfit dislocations. During the reaction the former run ahead whereas the latter lag behind. As a result the morphology of the reaction front is bowed. The results confirm earlier observations of Carter and Schmalzried of the semicoherent Al2O3(00.1)/CoAl2O4(111) interface, thus strongly supporting the conclusion of a fundamental new phase transformation mechanism specific to oxide systems.Presented at the workshop on High-Voltage and High-Resolution Electron Microscopy, February 21–24, 1994, Stuttgart, Germany. 相似文献
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RIVLIN T. J.; RUSCHEWEYH ST.; SHAFFER D.; WIRTHS K. J. 《IMA Journal of Numerical Analysis》1983,3(3):327-332
Given (1, 0), n N, we discuss the optimal recoveryof (), for analytic and bounded in < 1, from the knowledge of the values of at n points z1,.zm[0,l),where these points are chosen to produce the least possibleintrinsic error. The optimal algorithms are explicitly determined. 相似文献