排序方式: 共有262条查询结果,搜索用时 160 毫秒
131.
F. Ghanbari T. Ghoorchi P. Shawrang H. Mansouri N.M. Torbati-Nejad 《Radiation Physics and Chemistry》2012,81(6):672-678
This study was conducted to compare effects of electron beam (EB) and gamma ray (GR) treatments at doses of 25, 50 and 75 kGy on ruminal degradation kinetics of crude protein (CP), amino acid (AA), and in vitro digestibility of cottonseed meal (CSM). Ionizing radiations of EB and GR had significant effects (P<0.05) on CP and AA ruminal degradability characteristics of CSM. Effective ruminal degradability (ERD) of CP was lower in EB and GR irradiated CSM (P<0.05) than in unirradiated CSM. GR and EB treatments had the same effects on ERD decreasing of CP (P>0.05). Irradiation processing caused decrement in AA degradation after 16 h of ruminal incubation (P<0.05). EB irradiation was more effective than GR irradiation in lessening the ruminal degradability of AA (P<0.05). EB and GR treatments at a dose of 75 kGy increased in vitro digestibility of CSM numerically. This study showed that EB could cause CP and AA bypass rumen as well as GR. Therefore, ionizing irradiation processing can be used as an efficient method in improving nutritional value of CSM. 相似文献
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Davood Ghanbari Masoud Salavati-Niasari Mohammad Sabet 《Journal of Cluster Science》2012,23(4):1081-1095
In this work cadmium sulfide-thioglycolic acid (CdS-Organic) nanostructures were added to the poly(vinyl alcohol) and cellulose acetate polymeric matrixes. The influence of CdS-Organic (CdS-Org) content on the thermal degradation of polymeric matrixes was studied using thermogravimetric analysis. Thermal decomposition of the nanocomposites shifted towards higher temperature in the presence of the CdS-Org nanostructures. Nanostructures were characterized by scanning electron microscopy, atomic force microscopy, Ultraviolet–Visible and Fourier transform infrared spectroscopy. 相似文献
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Hamidreza Sanaeepur Abtin Ebadi Amooghin Abdolreza Moghadassi Ali Kargari Sadegh Moradi Davood Ghanbari 《先进技术聚合物》2012,23(8):1207-1218
Polymeric membranes were prepared by blending different grades of poly(ethylene glycol) (PEG) as the added polymer with acrylonitrile–butadiene–styrene as the backbone structure. The membranes were characterized by Fourier transform infrared, X‐ray diffractometry, dynamic mechanical thermal analysis, differential scanning calorimetry, and scanning electron microscopy. Furthermore, the gas permeation and separation properties of CO2/CH4 were studied. In addition, the effect of pressure (1–8 bar) and the effect of PEG content (0–40 wt%) on CO2 and CH4 permeability/selectivity were investigated. The results showed that, in more cases, with the introduction of PEG molecules, CO2/CH4 selectivity increases without significant changes in CH4 permeability, indicating that the incorporation of intermolecular interaction is suitable for the separation of gas pairs with no molecular size domination but the solution–diffusion. From the viewpoint of gas separation applications, the resultant data are in the commercially attractive region. Copyright © 2011 John Wiley & Sons, Ltd. 相似文献
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S. Akbari D. Cariolaro M. Chavooshi M. Ghanbari S. Zare 《Discrete Mathematics》2012,312(17):2593-2598
137.
In this paper, fuzzy linear systems involving a crisp square matrix and a fuzzy right-hand side vector are considered. A new approach to solve such systems based on interval theory and the new concept “interval inclusion linear system” is proposed. Also, new necessary and sufficient conditions are derived for obtaining the unique algebraic solution. Numerical examples are given to illustrate the efficiency of the proposed method. 相似文献
138.
Parisa Ghanbari Mahsa Mohseni Maryam Tabasinezhad Bahman Yousefi Amir Ata Saei Simin Sharifi Mohammad Reza Rashidi Nasser Samadi 《Applied biochemistry and biotechnology》2014,174(2):667-681
Combination therapy is considered a viable strategy to overcome the resistance to chemotherapeutics. Survivin as a member of the inhibitor of apoptosis protein (IAP) family, which is involved in resistance to various drugs. We investigated the role of combination therapy in downregulating survivin and increasing drug’s efficacy in MDA-MB-231 cells. MTT assay and DAPI staining were applied to study the anti-proliferative activity and apoptosis response of the agents. Real-time RT-PCR and Western blot analysis were applied to study survivin mRNA and protein. Our findings showed that combined treatment of cells with docetaxel and vinblastine reduces survivin expression and consequently decreases the IC50 value of docetaxel from 70 to 5 nM (p?0.05). Furthermore, combination therapy with deguelin, a survivin inhibitor, exerted a considerable enhancement in synergistic efficacy of docetaxel and vinblastine (p?0.05). Survivin downregulation may thus be considered a potential strategy in increasing the efficacy of chemotherapeutics in cancer patients. 相似文献
139.
A multiwall carbon nanotube modified electrode prepared by incorporating multiwall carbon nanotubes in the electrode of a sensor and naphthol green as a homogeneous mediator was used as a voltammetric sensor for the determination of N‐actylcysteine(N‐AC) in the presence of trypto-phan(Trp). The voltammograms of differential pulse voltammetry of N‐AC in a mixture with Trp were separated from each other by a potential difference of 200 mV, which allowed the determina-tion of both N‐AC and Trp simultaneously. Under the optimum conditions, the electrocatalytic cur-rents increased linearly with N‐AC concentration in the range of 0.25–400 μmol/L(two linear seg-ments with different slopes). The detection limit for N‐AC was 0.08 μmol/L. The kinetic parameters of the system were determined using electrochemical methods. The method was applied for the determination of N‐AC in drug and urine samples. 相似文献
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