Results 121 to 130 of about 23,921,062 (292)

Development and Validation of a Cellulose‐Coated Stir Bar Sorptive Extraction Method for a Simple, Environmentally Friendly Approach to Measuring Free Glycerol in Biodiesel

Journal of the American Oil Chemists' Society, EarlyView.
Preparation of a highly porous cellulose‐coated stir bar for the selective, environmentally friendly extraction of free glycerol from biodiesel using the SBSE method, followed by HPLC‐DAD analysis of the extract after derivatization with benzoyl chloride.
Caroline Lopes da Silva, Maria Aparecida Barros, Antônio Carlos Ferreira Batista, Anizio Marcio de Faria   +3 more
wiley   +1 more source

Retention time locking procedure for comprehensive two-dimensional gas chromatography

, 2011
In gas chromatography (GC) reproducible retention times are in many cases highly favorable or in some cases even required. In one-dimensional GC, retention time shifts can be eliminated or minimized using a procedure called retention time locking (RTL ...
Mommers, J., Knooren, J., Ynze Mengerink, Mengerink, Y., van der Wal, S., Sjoerd van der Wal, Vreuls, R., Jeroen Knooren, John Mommers, Arno Wilbers, Wilbers, A., Rene Vreuls   +11 more
core   +1 more source

Valorization of bark extracts from Cerrado and Amazon species: phenolic characterization, antioxidant capacity, and photoprotective potential for circular bioeconomy applications

Biofuels, Bioproducts and Biorefining, EarlyView.
Abstract Tree bark remains an underexploited source of high‐value‐added phenolic compounds with potential circular bioeconomy applications. This work characterized bark extracts from two species of distinct Brazilian biomes, Stryphnodendron adstringens (Cerrado) and Myrcia eximia (Amazon), obtained with three solvents (ethanol, methanol and acetone ...
Mário Sérgio Lorenço, Danilo José Machado de Abreu, Elesandra da Silva Araujo, Uasmim Lira Zidanes, Laise de Jesus dos Santos, Denisse Concepción Vega Villarruel, Elisângela Elena Nunes Carvalho, Fábio Akira Mori   +7 more
wiley   +1 more source

Separation characteristics of comprehensive two-dimensional gas chromatography in analyzing petroleum samples

, 2002
Separation characteristic of comprehensive two-dimensional gas chromatography (GC x GC) in analyzing petroleum samples was studied. A specific naphtha was analyzed and paraffins, naphthanes and aromatics were completely separated within one injection ...
Kong, HW, Ye, F, Ruan, CH, Xu, GW, Lu, X
core  

Comprehensive two-dimensional chromatography for analyzing complex samples: recent new advances

, 2014
Comprehensive two dimensional chromatography (C2DC) including comprehensive two dimensional gas chromatography (GC x GC), comprehensive two dimensional liquid chromatography (LC x LC) and comprehensive two dimensional supercritical fluid chromatography ...
许国旺, Shi, Xianzhe, Yang, Qin, Lu, Xin, Wang, Shuangyuan, Xu, Guowang   +5 more
core   +1 more source

Quantitative Partitioning of Photoautotrophic and Photoheterotrophic Contributions During Mixotrophic Growth of Scenedesmus obliquus

Biotechnology and Bioengineering, EarlyView.
Carbon and oxygen fluxes during photoautotrophic, photoheterotrophic and mixotrophic growth of Scenedesmus obliquus. ABSTRACT Mixotrophic growth of microalgae involves the simultaneous assimilation of inorganic and organic carbon sources, but the quantitative contributions of photoautotrophic and photoheterotrophic metabolisms remain poorly resolved ...
Solène Jahan, Thibault Combroux, Samy Kemel, Hélène Marec, Mariana Titica, Howard Fallowfield, Jérémy Pruvost, Guillaume Cogne   +7 more
wiley   +1 more source

Quantitative screening of organophosphorus and organochlorine pesticides in water and soil using comprehensive two-dimensional gas chromatography coupled with time-of-flight mass spectrometry

Journal of Chromatography Open
Organophosphorus and organochlorine pesticides, historically or currently widely used in agriculture, are prevalent in the environment and pose significant risks to public health and ecosystems.
Kuan Wang, Fengshou Dong, Xinglu Pan, Xiaohu Wu, Jun Xu, Yongquan Zheng   +5 more
doaj   +1 more source

Flocculation using selected cationic polymers reduces high‐risk host cell proteins in monoclonal antibody processes already during primary recovery

Biotechnology Progress, EarlyView.
Flocculation using cationic polymers leads to the creation of large floc complexes. Negative charged species like cells, cell debris, and negatively charged host cell impurities like host cell DNA and host cell proteins are trapped within the complex while the positively charged monoclonal antibody stays in solution.
Anna‐Carina Frank, Daniel Komuczki, Gregor Stitz, Timon Kalchmayr, Clemens Grünwald‐Gruber, Clara Hofmann, Natalie Deiringer, Christine Rösch, Peter Satzer, Rainer Hahn   +9 more
wiley   +1 more source

Comprehensive Two-Dimensional Gas Chromatography with Peak Tracking for Screening of Constituent Biodegradation in Petroleum UVCB Substances. [PDF]

Environ Sci Technol, 2023
Booth AM, Sørensen L, Brakstad OG, Ribicic D, Creese M, Arey JS, Lyon DY, Redman AD, Martin-Aparicio A, Camenzuli L, Wang N, Gros J.   +11 more
europepmc   +1 more source

A study on cigarette brand characteristics by using comprehensive two-dimensional gas chromatography coupled to time of flight mass spectrometry

, 2007
There was distinguished difference between Virginia type and blended type cigarette. Even the same type of cigarette from different factories differs from each other because of the different materials, manufacture process and additives used in the ...
许国旺, 逄涛, 路鑫
core