美国分析化学(英文)最新文献_第3页

Critical Examination of the Suitability of the Folin-Ciocalteu Reagent Assay for Quantitative Analysis of Polyphenols—The Case of Olive-Mill Wastewater 福林- ciocalteu试剂法定量分析多酚适宜性的关键性检验——以橄榄厂废水为例

美国分析化学(英文) Pub Date : 2022-01-01 DOI: 10.4236/ajac.2022.1311032

Mohamed Samara, A. Nasser, U. Mingelgrin

引用次数: 3

Hepatic Impact of Mandragora officinarum Leaf Extract on Wistar Albino Rats 甘露叶提取物对Wistar白化大鼠肝脏的影响

美国分析化学(英文) Pub Date : 2022-01-01 DOI: 10.4236/ajac.2022.1312035

Chioma Don-lawson, George Adiegboye Oforibika, Reminus Okah

引用次数: 0

Raman Spectroscopy for Forensic Identification of Body Fluid Traces: Method Validation for Potential False Negatives Caused by Blood-Affecting Diseases 拉曼光谱法鉴定体液痕迹:影响血液的疾病引起的潜在假阴性的方法验证

美国分析化学(英文) Pub Date : 2022-01-01 DOI: 10.4236/ajac.2022.131001

Niara A. Nichols, I. Lednev

{"title":"Raman Spectroscopy for Forensic Identification of Body Fluid Traces: Method Validation for Potential False Negatives Caused by Blood-Affecting Diseases","authors":"Niara A. Nichols, I. Lednev","doi":"10.4236/ajac.2022.131001","DOIUrl":"https://doi.org/10.4236/ajac.2022.131001","url":null,"abstract":"Two critical issues in forensic science are identifying body fluid traces found at crime scenes and preserving them for DNA analysis. However, the majority of current biochemical tests for body fluid identification, which are applicable at the crime scene, are presumptive and destructive to the sample. Raman Spectroscopy provides a suitable alternative to current methods as a nonde-structive, confirmatory, and potentially in field method. Our laboratory has developed a chemometric model for the identification of five main body fluids using Raman spectroscopy. This model was developed using samples obtained from healthy donors. Thus, it is of most importance for the forensic application of the method to validate its performance for donors with diseases that might affect the biochemical composition of body fluids. In this study, the developed method was validated using peripheral blood samples acquired from donors with Celiac Disease, Sickle Cell Anemia, and Type 2 Diabetes. It was shown that the method correctly identified all samples as peripheral blood indicating that no false positives could occur because the blood traces were originated from donors suffering from the diseases.","PeriodicalId":63216,"journal":{"name":"美国分析化学(英文)","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"70500233","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 4

Quality Control of Paracetamol Generic Tablets Marketed in Benin and Search of Its Two Impurities P-Aminophenol and P-Nitrophenol by HPLC-UV/Visible 贝宁市售扑热息痛仿制片的质量控制及对氨基酚和对硝基酚两种杂质的HPLC-UV/可见法测定

美国分析化学(英文) Pub Date : 2022-01-01 DOI: 10.4236/ajac.2022.1311030

Y. Achille, Agbokponto Janvier Engelbert, Assanhou Assogba Gabin, Adetona Pauline, Doffon Parfait, Ganfon Habib, Roland Marini Djang’eing’a

引用次数: 0

Geographical Traceability of Clinacanthus nutans with Near-Infrared Pectroscopy and Chemometrics 用近红外光谱和化学计量学研究北棘的地理溯源

美国分析化学(英文) Pub Date : 2022-01-01 DOI: 10.4236/ajac.2022.132006

Feng Yu, Jinfang Ma, Yi Qi, Han Song, Guiliang Tan, Furong Huang, Maoxun Yang

{"title":"Geographical Traceability of <i>Clinacanthus nutans</i> with Near-Infrared Pectroscopy and Chemometrics","authors":"Feng Yu, Jinfang Ma, Yi Qi, Han Song, Guiliang Tan, Furong Huang, Maoxun Yang","doi":"10.4236/ajac.2022.132006","DOIUrl":"https://doi.org/10.4236/ajac.2022.132006","url":null,"abstract":"In this study, a seed origin discrimination model for Clinacanthus nutans was developed. First, 81 C. nutans samples from three seed origin locations were collected, and their Near-Infrared (NIR) spectra were obtained. Next, Principal Component Analysis (PCA) was performed on the NIR spectra of the 81 C. nutans samples. Then, MSC (multiplicative scatter correction), SNV (stand-ard normal variate), first derivative, and second derivative pre-treatments of the C. nutans spectra were performed and combined with the Support Vector Machine (SVM) algorithm for modelling and analysis. Among these methods, first-order derivative pre-treatment achieved the best SVM model effectiveness, with a training set accuracy of 93.44% (57/61) and a test set accuracy of 85.00% (17/20). In order to further improve the discrimination accuracy of the model, three optimization algorithms Grid Search (GS), Genetic Algorithm (GA), and Particle Swarm Optimization (PSO) were employed to identify the best c and g parameters for the SVM model. The results demonstrated that the PSO optimization algorithm yielded the best parameters of c = 0.8343, g = 57.8741, with corresponding model training set the accuracy of 96.36% (60/61) and test set the accuracy of 95.00% (20/21). Therefore, developing a seed origin classification model for C. nutans based on NIR spectroscopy combined with chemometrics is feasible and has the advantages of being simple, rapid, and green.","PeriodicalId":63216,"journal":{"name":"美国分析化学(英文)","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"70500443","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 2

Phytochemical Screening by High-Performance Thin-Layer Chromatography, Antioxidant Activities and Acute Toxicity of Trunk Barks Extracts of Lannea velutina A. Rich 高效薄层色谱植物化学筛选、抗氧化活性及急性毒性研究

美国分析化学(英文) Pub Date : 2022-01-01 DOI: 10.4236/ajac.2022.1310025

B. Kaboré, Moumouni Koala, Mathieu Nitiema, Windingoudi Rimwagna Christian Ouedraogo, Souleymane Compaoré, L. Belemnaba, S. Ouedraogo, Sylvain Ilboudo, N. Ouedraogo, Constantin M. Dabiré, F. Kini, S. Ouédraogo, E. Palé

引用次数: 1

Review on Recent Progress of Nanostructured Anode Materials for Li-Ion Batteries 锂离子电池纳米结构负极材料研究进展

美国分析化学(英文) Pub Date : 2022-01-01 DOI: 10.4236/ajac.2022.1311029

T. S. A. Jeevan, G. Tadele, Liyew Yizengaw, M. F. L. Johnson

引用次数: 0

Optimization of High-Performance Liquid Chromatography Parameters for Purification of Oligonucleotide-A 寡核苷酸a高效液相色谱纯化参数的优化

美国分析化学(英文) Pub Date : 2022-01-01 DOI: 10.4236/ajac.2022.132004

Christina R. Perez, M. Rani, T. Phan

引用次数: 2

Influence of Some Physico-Chemical Exposure Factors on the Carbocysteine Content of an Opened Pharmaceutical Product 一些理化暴露因素对开封药品中碳半胱氨酸含量的影响

美国分析化学(英文) Pub Date : 2022-01-01 DOI: 10.4236/ajac.2022.1312033

Jean-Kisito Kouamé, M. D. Yéhé, Carine Nina Ablé, Vincent De Paul Ovi, Hervé Tazoh Broh, C. B. N. Ngantchouko, G. Gbassi