Comparative efficacy of plant derived extracts with the insecticide mospilan on two whitefly species Bemisia tabaci biotype B and Trialeurodes ricini by Hanaa S. Hussein, Mamdouh H. Idriss, Farouk H. El-Gayar, Hebatullah Yehia Saad Mousa, Mohamed Z. M. Salem

“…The chemical compositions of HEs were identified using gas chromatography-mass spectrometry (GC-MS) and gas chromatography with flame-ionization detection (GC-FID) analysis. …”
Get full text

Improvement in Analytical Methods for Determination of Sugars in Fermented Alcoholic Beverages by Ayalew Debebe, Shibru Temesgen, Mesfin Redi-Abshiro, Bhagwan Singh Chandravanshi, Estifanos Ele

“…The main objective of this study was to improve the performance of analytical methods for the determination of sugars in fermented alcoholic beverages based on mid-infrared-partial least squares (MIR-PLS), high-performance liquid chromatography with the ultraviolet detector (HPLC-UV), high-performance liquid chromatography with the refractive index detector (HPLC-RI), and sulfuric acid methods. …”
Get full text

Chemical Composition, Antioxidant Activity, and Antifungal Effects of Essential Oil from Laurus nobilis L. Flowers Growing in Morocco by Ibrahim Mssillou, Abdelkrim Agour, Asmae El Ghouizi, Noureddine Hamamouch, Badiaa Lyoussi, Elhoussine Derwich

“…The chemical composition of the obtained essential oil and chemotypes was determined using gas chromatography coupled with mass spectrometry (GC/MS) and gas chromatography with flame ionization detection (GC-FID). …”
Get full text

Influence of Frying Methods on Quality Characteristics and Volatile Flavor Compounds of Giant Salamander (Andrias davidianus) Meatballs by Wengang Jin, Jinjin Pei, Xiaohua Chen, Jingzhang Geng, Dejing Chen, Ruichang Gao

“…There was little distinction in sensory score, cohesiveness, and chewiness between the two frying methods (p>0.05). Gas chromatography ion migration chromatography (GC-IMS) was used for flavor compound analysis, and 50 flavor compounds were analyzed, containing 22 aldehydes, 11 ketones, 6 olefins, 4 acids, 3 esters, 3 alcohols, and 1 phenol. …”
Get full text

Recovery of Bioactive Constituents from Olive Leaf Pruning Waste of Five Different Cultivars: A Comparison of Green Extraction Techniques to Maximize Health Benefits by Hamid Mushtaq, Simona Piccolella, Jose A. Mendiola, Lidia Montero, Elena Ibáñez, Severina Pacifico

“…Chemical profiling by UHPLC-HR-MS/MS (ultra-high-performance liquid chromatography high-resolution tandem mass spectrometry) and GC-MS (gas chromatography mass spectrometry) showed that UAM-EtOH effectively extracted polyphenols (especially luteolin derivatives) and triterpenes (notably maslinic acid), while PLE yielded the highest amount of secoiridoids (e.g., secologanoside). …”
Get full text

Antimicrobial Activity of Aspergillus sp. from the Amazon Biome: Isolation of Kojic Acid by Josy Caldas Rodrigues, Weison Lima da Silva, David Ribeiro da Silva, Carolina Rabelo Maia, Clarice Virginia Santos Goiabeira, Haile Dean Figueiredo Chagas, Gigliola Mayara Ayres D’Elia, Gleica Soyan Barbosa Alves, Viviane Zahner, Cecilia Veronica Nunez, Ormezinda Celeste Cristo Fernandes

“…The extract was subjected to thin layer chromatography (TLC) and fractionated by open and semipreparative column chromatography. …”
Get full text

Enhancing the targeted and untargeted analysis of honey by vacuum-assisted SPME-GC × GC-MS. A green, practical, and highly informative approach by Damien Eggermont, Francesca Pardi, Giorgia Purcaro

“…The results obtained from a series of commercially available honey were compared with those obtained using the official high-performance liquid chromatography-UV method, obtaining comparable results but through a greener and more practical method. …”
Get full text

Comparative Evaluation of Structural Characteristics and in Vitro Biological Activities of Polysaccharides from Common Bean (Phaseolus vulgaris L.) and Those from Shiitake Mushroom... by XU Mengyue, TIAN Xin, WANG Junke, WU Aoxue, ZOU Zhiyi, WU Jiahui, WANG Hongbo

“…Fourier transform infrared spectroscopy (FTIR), high performance liquid chromatography (HPLC), high performance gel permeation chromatography (HPGPC), scanning electron microscopy (SEM) and Congo red assay were used to characterize the structures, monosaccharide compositions, molecular masses, and microstructures of the two kinds of polysaccharides. …”
Get full text

Canvas support impregnation materials and techniques: a study of Portuguese painting and its conservation issues by Andréa Carolina Teixeira

“…This paper focuses on the study of oil based coating impregnations, applied in the past, on the reverse of Portuguese painting canvas supports.The scientific study of the impregnation materials found in the painting “The Knight of the Order of Malta” (18th century) was carried out on samples using several analytical techniques – Optical Microscopy (OM) under visible reflected and polarised light and ultraviolet fluorescence (UV); Gas chromatography mass spectrometry (GC-MS), Fourier transform Infrared spectroscopy (transmission and FTIR-ATR), and Scanning electron microscopy coupled with an energy dispersive X-ray spectroscopy (SEM-EDX) – in order to identify the materials and the techniques used in this practice.…”
Get full text

Chemical Composition of the Essential Oil of Cyperus Conglomeratus Rottb. from Iran by A. Feizbakhsh, A. Naeemy

“…The compositions of the essential oil from cyperus conglomerates were obtained by hydrodistillation and analyzed by GC/MS (Gas chromatography/mass spectrometry). Twenty seven compounds were identified. …”
Get full text

Fuzzy Algorithm for Power Transformer Diagnostics by Nitin K. Dhote, Jagdish B. Helonde

“…Many conventional DGA methods have been developed to interpret DGA results obtained from gas chromatography. Although these methods are widely used in the world, they sometimes fail to diagnose, especially when DGA results fall outside conventional methods codes or when more than one fault exist in the transformer. …”
Get full text

A Sulfuryl Group Transfer Strategy to Selectively Prepare Sulfated Steroids and Isotopically Labelled Derivatives by Jaber A. Alshehri, Daniel M. Gill, Alan M. Jones

“…An important feature of the disclosed methodology is the millimolar scale of the reaction, and the isolation of the corresponding steroid sulfates as their biologically relevant sodium salts without the need for ion-exchange chromatography. The scope of the method was further explored in the estradiol and pregnanediol steroid systems with the bis-sulfated derivatives. …”
Get full text

Investigation of <i>Atraphaxis virgata</i>, an Unexplored Medicinal Plant Rich in Flavonoids, as a Functional Material by Soeun Shin, Seunghee Kim, Jeongho Lee, Hyerim Son, Jin-Hyub Paik, Nadezhda Gennadievna Gemejiyeva, Zhanat Zhumabekovna Karzhaubekova, Taek Lee, Hah Young Yoo

“…In this study, phytochemical compounds of <i>A. virgata</i> extracts were identified using high-performance liquid chromatography (HPLC) and gas chromatography–mass spectrometry (GC-MS) and their antioxidant activity was evaluated. …”
Get full text

Characterization of flavor fingerprinting of red sufu during fermentation and the comparison of volatiles of typical products by Peng Wang, Xiaoran Ma, Wenping Wang, Dandan Xu, Xin Zhang, Jian Zhang, Yong Sun

“…In this study, the volatile aroma analysis of Wangzhihe red sufu (WRS) from different fermentation stages and four typical red sufu products from different locations was carried out by gas chromatography-mass spectrometry (GC–MS), gas chromatography-mass spectrometry/olfactory (GC–MS/O), electronic nose (E-nose) and sensory evaluation. …”
Get full text

Synthesis of Mannich N-bases based on benzimidazole derivatives using SiO2OAlCl2 catalyst and their potential as antioxidant, antibacterial, and anticancer agents by Antonius Herry Cahyana, Ikrimah Desta, Laely Amaliyah, Aida Nadia, Hilna Diana Sahaya, Dicky Annas, Bayu Ardiansah, Mohammad Jihad Madiabu, Inda Mapiliandari, Kang Hyun Park

“…The purity of the synthesized compounds was monitored by Thin layer chromatography (TLC), melting point test, Ultraviolet-visible (UV–Vis), and Liquid chromatography-Mass spectrometry (LC-MS). …”
Get full text

Antioxidant and Chelating Activity of Nontoxic Jatropha curcas L. Protein Hydrolysates Produced by In Vitro Digestion Using Pepsin and Pancreatin by Santiago Gallegos Tintoré, Cristina Torres Fuentes, Javier Solorza Feria, Manuel Alaiz, Julio Girón Calle, Alma Leticia Martínez Ayala, Luis Chel Guerrero, Javier Vioque

“…The hydrolysates were produced by treatment of a nontoxic genotype with the digestive enzymes pepsin and pancreatin and then were characterized by fast protein liquid chromatography and reverse phase chromatography. Peptidic fractions with higher radical scavenging activity were analysed by matrix-assisted laser desorption/ionization mass spectrometry. …”
Get full text

Assessment of Microbiological Indoor Air Quality in Cattle Breeding Farms by Justyna Szulc, Małgorzata Okrasa, Katarzyna Dybka-Stępień, Michael Sulyok, Adriana Nowak, Anna Otlewska, Bogumiła Szponar, Katarzyna Majchrzycka

“…Abstract This study, which was conducted on a farm in central Poland from February till April 2019, aimed to evaluate microbiological threats on cattle breeding premises by counting and identifying the microorganisms (via culturing and high-throughput sequencing), assessing the endotoxin concentrations (via gas chromatography-mass spectrometry [GC-MS]) and analysing the secondary metabolites (including mycotoxins) in the air and sedimented dust (via liquid chromatography-tandem mass spectrometry [LC-MS/MS]) in six barns. …”
Get full text

Seasonal phytochemical study and antimicrobial potential of Vetiveria zizanioides roots by Dos Santos Delair Silveira, Oberger Júlia Vieira, Niero Rivaldo, Wagner Theodoro, Delle Monache Franco, Cruz Alexandre Bella, Martin-Quintal Zhelmy, Cechinel Filho Valdir

“…Khusimol (2) was isolated by column chromatography and identified by NMR and CG-MS, along with other sesquiterpenes, including β-vetivenene (1), vetiselinenol (3), isovalencenol (4), vetivenic acid (5), α-vetivone (6) and β-vetivone (7). …”
Get full text

Predictive value of bile acids as metabolite biomarkers for gallstone disease: A systematic review and meta-analysis. by Xu Han, Juan Wang, Yingnan Wu, Hao Gu, Ning Zhao, Xing Liao, Miao Jiang

“…The level of serum DCA in the GSD patients was found to be increased by using chromatography, yet decreased by chromatography mass spectrometry.…”
Get full text

Comparative analysis of phytonutrients of Moringa oleifera leaves from South Africa and Nigeria, and their antimicrobial and antioxidant potentials by UPLC-ESI-QToF-MS and OPLS-DA... by Jonathan Kayembe, Cosa Sekelwa, Kokoette Bassey

“…This study aimed to conduct a comparative analysis of the phytonutrients (nutrients protectors) or supplements, antioxidant, and antimicrobial potentials of M. oleifera leaves from Nigeria and South Africa to benchmark quality control protocols for commercial beverages such as Moringa porridge.MethodsStandard techniques, including high-performance liquid chromatography-photodiode array and ultra-high-performance liquid chromatography electrospray ionization quadruple time-of-flight mass spectrometry (UPLC-ESI-QToF-MS) and chemometrics orthogonal partial least square discriminant analysis (OPLS-DA) were employed for phytoconstituents fingerprinting. …”
Get full text