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High performance liquid chromatography quality control 高效液相色谱质量控制
Pub Date : 2020-06-14 DOI: 10.14419/ijac.v8i1.30723
M. Mohammed El Amine, A. E. Ghanjaoui, A. Mandil, A. Ait Sidi Mou, R. Slimani
This review gives a general overview of High Performance Liquid Chromatography (HPLC) Method for the detection, the separation and the quantification of the active compounds from the organics matrices. A brief description of the instrumentation and the method devel-opment is provided. The principles of HPLC including different separation modes and detection methods for the quantitative analysis are summarized. Finely, the validation procedures in real samples are also described.  
本文综述了高效液相色谱法(HPLC)在有机基质中有效成分的检测、分离和定量分析中的应用。简要描述了仪器和方法的发展。概述了HPLC的原理,包括不同的分离方式和定量分析的检测方法。最后,对实际样品的验证过程进行了描述。
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引用次数: 2
Comparative viscometric study of pure and acetylated gum Arabic using different plot methods 纯阿拉伯胶和乙酰化阿拉伯胶粘度测定方法的比较研究
Pub Date : 2020-06-04 DOI: 10.14419/ijac.v8i1.30526
Alhassan S.I, Sule S.Y, M. R., R. H.I, Baso A.A, Sheshe F.A, Jafar S.C
Acetylation of gum Arabic was achieved using acetic anhydride as solvent. The ester group formed was confirmed by FTIR spectra having absorption band of 750 cm-1 – 700 cm-1. Viscometric study of the pure and acetylated samples was carried out. Relative viscosity of acetylated gum was found to be higher than that of the pure gum. Intrinsic viscosity was determined for the two samples using different plot methods taking Huggin’s plot as standard. The intrinsic viscosity was found to be 86.43 cm3/g and 64.59 cm3/g for acetylated and pure gum arabic respectively. Relative errors of other methods for the two samples was compared to that of Huggins and the plots that are most comparable to Huggins with relative errors less than 5% are; Martin, Lyon-Tobolsky, Staudinger-Heuer, Maron-Reznik and our proposed method. The proposed method which was a modification of the Kreiser method gave relative error less than 2 %, for both pure and modified gum. Whereas the Kreiser method gave relative error greater than 15 % for both methods. The critical concentration for the samples was found to be 0.0116 g/cm3 and 0.0155 g/cm3 for acetylated and pure gum respectively. This shows that there was no molecule-molecule entanglements during viscosity measurements. 
以乙酸酐为溶剂,实现了阿拉伯胶的乙酰化反应。在750 cm-1 ~ 700 cm-1波段的FTIR光谱上证实了所形成的酯基。对纯样品和乙酰化样品进行了粘度测定。发现乙酰化胶的相对粘度高于纯胶。以Huggin图为标准,采用不同的绘图方法测定两种样品的特性粘度。乙酰化阿拉伯胶和纯阿拉伯胶的特性粘度分别为86.43 cm3/g和64.59 cm3/g。将两个样本的其他方法的相对误差与Huggins的相对误差进行比较,与Huggins最具可比性且相对误差小于5%的图为;Martin, Lyon-Tobolsky, Staudinger-Heuer, Maron-Reznik和我们提出的方法。本文提出的方法是对Kreiser法的改进,对纯胶和改性胶的相对误差均小于2%。而Kreiser法两种方法的相对误差均大于15%。乙酰化胶和纯胶的临界浓度分别为0.0116 g/cm3和0.0155 g/cm3。这表明在粘度测量过程中不存在分子间的缠结。
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引用次数: 0
Study of ternary association of anti-microbial drug 1, 10-phenanthroline and α - amino acid with copper salt, an ultrasonic investigation of competitive interaction 抗微生物药物1,10 -菲罗啉和α -氨基酸与铜盐三元缔合的研究及竞争性相互作用的超声研究
Pub Date : 2020-06-04 DOI: 10.14419/ijac.v8i1.30541
Ashok Kumar Sahoo, Sunil Kumar Pradhan, Ajaya Kumar Patnaik, S. Das
Molecular interaction studies using ultrasonic technique and spectroscopic investigation in ternary liquid mixture of drug 1,10-Phenanthroline, an α- amino acid Glycine and a transition metal salt like CuCl2 in aqueous medium has been carried out at 300.15K and 2 MHz frequency. Using experimental values of density (ρ),ultrasonic velocity (U) and UV analysis, different acoustical parameters such as adiabatic compressibility (β),intermolecular free length (Lf), acoustic impedance (z),relative association (RA),apparent molar volume (V∅), apparent molar adiabatic compressibility (K∅) are evaluated for the mixture of drug, glycine and inorganic salt CuCl2 at various concentrations. The ultrasonic and spectroscopic investigation clearly shows coordinative association of drug as a ligand with transition metal salt. Further interaction of glycine as an α- amino acid indicates a competitive association in the ternary system. The outcomes were expressed in terms of molecular interactions and the variation in parameters under varying solute concentrations providing conclusive remarks regarding the strength of intermolecular interactions in the ternary system with a bio-physical novelty. 
在300.15K和2 MHz频率下,用超声技术研究了药物1,10-菲罗啉、α-氨基酸甘氨酸和过渡金属盐CuCl2三元液体混合物在水介质中的分子相互作用和光谱研究。利用密度(ρ)、超声速度(U)和紫外分析的实验值,对不同浓度的药物、甘氨酸和无机盐CuCl2的混合物进行绝热压缩系数(β)、分子间自由长度(Lf)、声阻抗(z)、相对结合度(RA)、表观摩尔体积(V∅)、表观摩尔绝热压缩系数(K∅)等声学参数的评价。超声和光谱研究清楚地表明药物作为配体与过渡金属盐的配位结合。甘氨酸作为α-氨基酸的进一步相互作用表明在三元体系中存在竞争关联。结果以分子相互作用和不同溶质浓度下参数的变化来表示,为三元体系中具有生物物理新颖性的分子间相互作用的强度提供了结论性的评论。
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引用次数: 0
Determination and validation of pregabalin in bulk and pharmaceutical formulations by reversed phase-high performance liquid chromatography 反相高效液相色谱法测定原料药和制剂中普瑞巴林的含量
Pub Date : 2020-05-15 DOI: 10.14419/ijac.v8i1.30513
D. N. Vidya, R. Chaithra, G. P. Senthil Kumar, D. R. Bhadresh
A simple, specific, quick, isocratic Reversed Phase High Performance Liquid Chromatographic method was developed and validated for the analysis of Pregabalin in bulk and 5-different pharmaceutical formulations, the separation was accomplished on a C18, 5μm Reverse Phase column (250 mm × 4.6 mm) using a methanol : water (95:5, v/v) mobile phase. The compound was eluted isocratically at a flow rate of 0.8 ml /min. The UV detector was set at 288 nm for the detection of Pregabalin (PRG). The method was linear over the range of 5-45 μg/ml and validated with respect to accuracy, precision, linearity, and specificity, limit of detection and limit of quantization. Robustness testing was also conducted to evaluate the effect of minor changes to the chromatographic system and to establish appropriate system suitability parameters. This method was used successfully for the quality assessment of 5-different pharmaceutical formulations with good precision and accuracy.   
采用甲醇:水(95:5,v/v)流动相,采用C18, 5μm反相柱(250 mm × 4.6 mm)进行分离,建立了一种简单、特异、快速的反相高效液相色谱分析普瑞巴林原料药和5种不同制剂的方法。以0.8 ml /min的流速等量洗脱。采用分光光度为288 nm的紫外检测器检测普瑞巴林(PRG)。方法在5 ~ 45 μg/ml范围内呈线性,准确度、精密度、线性、特异性、检出限和定量限均得到验证。还进行了稳健性测试,以评估对色谱系统的微小变化的影响,并建立适当的系统适用性参数。该方法可用于5种不同制剂的质量评价,具有良好的精密度和准确度。
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引用次数: 0
Synthesis and characterization of pullulan derived hydrogel matrix as carrier for slow release of anti-cancer drug 普鲁兰衍生物缓释抗癌药物载体水凝胶基质的合成与表征
Pub Date : 2020-05-15 DOI: 10.14419/ijac.v8i1.30549
K. Bello
The present study is aimed at designing a pullulan based hydrogel through grafting technique for slow release of fluorouracil drug. To achieve this, pullulan grafted acrylic acid was synthesized and characterized by FTIR, and FESEM analyses. Swelling was done in different pH solutions with better swelling in pH 2. As such, the drug loading was done in the specified pH environment. The release profile revealed that more than 90 % of the drug could be released within 5 days. The prepared hydrogel may be considered as stimuli responsive materials for oral drug delivery of anti-cancer drugs.  
本研究旨在通过接枝技术设计一种以普鲁兰为基础的氟尿嘧啶缓释水凝胶。为此,合成了普鲁兰接枝丙烯酸,并用FTIR和FESEM对其进行了表征。在不同的pH值溶液中进行溶胀,pH值为2的溶胀效果更好。因此,在指定的pH环境中进行药物装载。释放谱显示,90%以上的药物可在5天内释放。所制备的水凝胶可视为口服抗癌药物给药的刺激反应材料。
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引用次数: 0
Validated HPTLC method for the quantitation of levetiracetam in pure and tablet dosage form 采用高效液相色谱法测定左乙拉西坦纯剂型和片剂剂型的含量
Pub Date : 2020-05-15 DOI: 10.14419/ijac.v8i1.30542
Likitha T G, J. Gnana Babu C., S. H G
A rapid, simple, precise and accurate high performance thin layer chromatographic method has been developed and validated for the estima-tion of Levetiracetam in bulk and tablet dosage form. The Levetiracetam was chromatographed on silica gel 60 F254 HPTLC plate as a sta-tionary phase. The mobile phase was Ethyl acetate: Methanol: Ammonia in the ratio of 7:1:2 respectively. It gave a dense and compact spot of Levetiracetam with an Rf value of 0.56. The quantitation was carried out at 210 nm. The method was validated in terms of linearity, accu-racy, precision and specificity. The statistical analysis proved that the developed method is accurate and reproducible with linearity in the range of 100 to 500 ng/spot. The limit of detection and limit of quantitation for Levetiracetam were 3.55 and 10.66 ng/spot respectively. The developed method can be employed for the routine analysis of Levetiracetam in the tablet dosage form.
建立了一种快速、简便、精确、准确的高效薄层色谱法测定左乙拉西坦原料药和片剂的含量。左乙拉西坦在硅胶60f254高效液相色谱板上作为固定相进行色谱分析。流动相为乙酸乙酯:甲醇:氨,比例为7:1:2。结果表明,左乙拉西坦斑点致密致密,Rf值为0.56。在210 nm处进行定量。从线性度、准确度、精密度、专属性等方面验证了该方法的有效性。统计分析表明,该方法在100 ~ 500 ng/点范围内具有良好的重复性和良好的线性关系。左乙拉西坦的检出限为3.55 ng/点,定量限为10.66 ng/点。该方法可用于片剂型左乙拉西坦的常规分析。
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引用次数: 0
Method development and validation of clobazam in bulk and pharmaceutical dosage forms by using high performance thin layer chromatographic method 高效薄层色谱法测定氯巴唑原料药和制剂的方法建立和验证
Pub Date : 2020-04-28 DOI: 10.14419/ijac.v8i1.30498
C. R., Senthil Kumar Gp, P. P, Vidya Dn, Bhadresh Dr, M. S
In the present research a simple, accurate, precise and cost-effective High-performance thin layer chromatographic method for the estimation of clobazam, in bulk and pharmaceutical dosage form was illustrated. The RF value of the drug was found to be 0.74 in the mobile phase, acetone: toluene: formic acid (1: 1: 0.05 v/v/v). A linear response was observed in the range of 100-700 ng with a regression coefficient of 0.999. Validation parameters were carried out as per the guidelines of International Conference for Harmonization (ICH). This method can be used in the industries for determination of clobazam to analyze the quality of formulation without interference of the excipients. 
本文介绍了一种简便、准确、精密度高、性价比高的高效薄层色谱法测定氯巴唑原料药和制剂中氯巴唑的含量。在丙酮:甲苯:甲酸(1:1:0.05 v/v/v)的流动相中,发现该药物的RF值为0.74。在100 ~ 700 ng范围内呈线性响应,回归系数为0.999。验证参数按照国际协调会议(ICH)的指导方针进行。该方法可用于氯巴嗪制剂的质量分析,不受辅料的干扰。
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引用次数: 0
Hereditary immunity in cancer 癌症的遗传免疫
Pub Date : 2020-04-28 DOI: 10.14419/ijac.v8i1.30607
Alireza Heidari, Katrin E. Schmitt, M. Henderson, E. Besana
Cancer is one of the malignant diseases and millions of people worldwide die from cancer annually. Breast cancer diagnosis requires the analysis of images and attributes as well as collecting many clinical and mammography variables. In diagnosis of breast cancer, it is im-portant to determine whether a tumor is benign or malignant. The information about breast cancer risk prediction along with the type of tu-mor are crucial for patients and effective medical decision making. An ideal diagnostic system could effectively distinguish between benign and malignant cells; however, such a system has not been created yet. In this study, a model is developed to improve the prediction probabil-ity of breast cancer. It is necessary to have such a prediction model as the survival probability of breast cancer is high when patients are diagnosed at early stages.  
癌症是恶性疾病之一,全世界每年有数百万人死于癌症。乳腺癌诊断需要分析图像和属性,以及收集许多临床和乳房x光检查变量。在乳腺癌的诊断中,确定肿瘤是良性还是恶性是很重要的。有关乳腺癌风险预测和肿瘤类型的信息对患者和有效的医疗决策至关重要。理想的诊断系统能有效区分良、恶性细胞;但是,目前还没有建立这样一个系统。在本研究中,建立了一个模型来提高乳腺癌的预测概率。由于乳腺癌患者在早期诊断时生存率较高,因此有必要建立这样的预测模型。
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引用次数: 12
A chemical review on cancer immunology and immunodeficiency 肿瘤免疫学与免疫缺陷的化学进展
Pub Date : 2020-04-18 DOI: 10.14419/ijac.v8i1.30490
Alireza Heidari, Katrin E. Schmitt, M. Henderson, E. Besana
Cancer is the most popular reason of death worldwide that many people struggle with it. Although the cancer is dangerous, but if it detects in early stages increases the chance of patient survival. The miRNAs are one of the important ways for early cancer detection that it caused to return an interesting field for researches. All the miRNAs haven’t any role in cancer detection. The Quantum Genetic Algorithm (QGA) is a developed Genetic Algorithm (GA) that by using of quantum computing on top of the genetic algorithm to alleviate the pre convergence problem. The interest of this study is to adopt the QGA for solving of informative miRNAs selection and irrelevant miRNAs removing problem. However, in the suggested algorithm, SVM classifier performance and the dimension of the selected feature vector are dependent on heuristic information for QGA. As a result, the proposed approach selects the adaptive feature subset with respect to the shortest feature dimension and the improved performance of the classifier. The performances of this method are evaluated on the popular data set which the experimental results show that since QGA-SVM is used as one of wrapper methods, as a result, its overall performance is better separation between normal and cancer expression for all types of cancer and better classification rate.  
癌症是世界上最常见的死亡原因,许多人都在与之抗争。虽然癌症是危险的,但如果在早期发现就会增加患者生存的机会。mirna作为早期癌症检测的重要手段之一,使其成为一个有趣的研究领域。所有的mirna在癌症检测中没有任何作用。量子遗传算法(Quantum Genetic Algorithm, QGA)是在遗传算法的基础上利用量子计算来解决预收敛问题而发展起来的一种遗传算法。本研究的兴趣是采用QGA来解决信息性mirna的选择和不相关mirna的去除问题。然而,在本文提出的算法中,SVM分类器的性能和所选特征向量的维数依赖于启发式信息。结果表明,该方法选择的自适应特征子集相对于最短的特征维数和改进的分类器性能。在流行的数据集上对该方法的性能进行了评价,实验结果表明,由于使用QGA-SVM作为包装方法之一,因此其整体性能对所有类型的癌症具有更好的正常与癌表达分离和更好的分类率。
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引用次数: 21
A comprehensive review on functional roles of cancerous immunoglobulins and potential applications in cancer immunodiagnostics and immunotherapy 癌症免疫球蛋白的功能作用及其在癌症免疫诊断和免疫治疗中的潜在应用综述
Pub Date : 2020-04-18 DOI: 10.14419/ijac.v8i1.30500
Alireza Heidari, Victoria Peterson
In this research, poly (D, L-lactide-co-glycolide)-block-poly (ethylene glycol), (PLGA-PEG) nanoparticles (NPs) of less than 195 nm in diameter containing of Naringenin (NRG) a naturally flavonoid were synthesized. Encapsulated form NRG improves its medical properties and solubility. The therapeutic efficacy of the encapsulated naringenin (NRG-NPs) and NRG on human lung epithelial (A549) and mouse mammary (4T1) carcinoma cells proliferation was determined by MTT assays. The cytotoxicity potency was rated as follows: NRG-NPs > NRG. The antioxidant effects of the NRG and NRG-NPs were also determined by FRAP method. Our results show that NRG-NPs are cytotoxic compounds for cancer cells and anti-cancer effect can be attributed to the presence of Fe chelatory and antioxidant effects of NRG-NPs.  
本研究合成了含天然类黄酮柚皮素(NRG)的直径小于195 nm的聚(D, l -丙交酯-共乙醇酸酯)-嵌段聚乙二醇(PLGA-PEG)纳米颗粒(NPs)。包封后的NRG改善了其医用性能和溶解性。MTT法观察柚皮素包被物(NRG- nps)和NRG对人肺上皮细胞(A549)和小鼠乳腺(4T1)癌细胞增殖的影响。细胞毒效价分级如下:NRG- nps > NRG。采用FRAP法测定NRG和NRG- nps的抗氧化作用。我们的研究结果表明,NRG-NPs是癌细胞的细胞毒性化合物,其抗癌作用可能归因于NRG-NPs的铁螯合和抗氧化作用。
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引用次数: 21
期刊
International Journal of Advanced Chemistry
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