Results 41 to 50 of about 17,233 (279)

HS-GC-IMS Analysis of Volatile Organic Compounds in Different Varieties and Harvesting Times of Rhizoma gastrodiae (Tian Ma) in Yunnan Province

Molecules, 2023
Headspace–gas chromatography–ion mobility spectrometry (HS-GC-IMS) coupled with principal component analysis (PCA) was used to investigate the differences in volatile organic compounds (VOCs) in four different varieties of Yunnan Huang Tian Ma ...
Hao Duan, Shiqi Zhou, Jinhong Guo, Wenjie Yan   +3 more
doaj   +1 more source

Sensory and Volatile Profiles of Korean Commercially Distilled Soju Using Descriptive Analysis and HS-SPME-GC-MS

Foods, 2020
Volatile compositions and sensory characteristics of 11 commercially distilled soju samples were investigated using headspace solid-phase microextraction (HS-SPME) with gas chromatography-mass spectrometry (GC-MS) and sensory descriptive analysis.
Jung-Min Hong, Tae-Wan Kim, Seung-Joo Lee   +2 more
doaj   +1 more source

Not more than three tissue kallikreins identified from organs of the guinea pig [PDF]

, 1999
The large and varied multigene families of tissue kallikreins of rat and mouse are considered to selectively release as many bioactive peptides. In order to determine whether a similar family of enzymes is expressed in the organs of the guinea pig ...
Fiedler, F., Bhoola, K. D., Betz, G., Hinz, H., Lottspeich, F., Raidoo, D. M.   +5 more
core   +1 more source

Decay Resistance of Pterocarpus erinaceus Poir. and the Antifungal Properties of its Extract

BioResources, 2023
The processing residue of Pterocarpus erinaceus was used to obtain an ethanol-extract, whose anti-fungal properties and mode of action was investigated using multi-omics principles and gas chromatography-mass spectrometry.
Lizhuan Zuo, Mingxuan Qu, Zhiru Song, Yingying Zhang, Xingyu Su, Xianghua Yue, Chuanfu Li, Bin Xu   +7 more
doaj   +2 more sources

One-Pot Enol Silane Formation–Allylation of Ketones Promoted by Trimethylsilyl Trifluoromethanesulfonate

, 2023
Ketones and related substrate classes undergo enol silane formation in the presence of trimethylsilyl trifluoromethanesulfonate (TMSOTf) and triethylamine, reaction conditions that also promote the in situ ionization of allyl propionates.
Elizabeth D. Heafner, Yiqi Liu, Downey, C. Wade, Zhong, Hanyu, Connors, Alexa, Lin, Xuechun, Heafner, Elizabeth D., Liu, Yiqi, Alexa H. Connors, R. Joseph Coyle, Coyle, R. J., Xuechun Lin, C. Wade Downey, Hanyu Zhong   +13 more
core   +1 more source

Synthesis of High Enantiopurity N-Protected α-Amino Ketones by Thiol Ester−Organostannane Cross-Coupling Using pH-Neutral Conditions

, 2016
An efficient synthesis of high enantiopurity N-protected α-amino ketones is described. Complementing other studies using boronic acids and thiol esters, this Cu(I) diphenylphosphinate (CuDPP)-mediated, palladium-catalyzed coupling of α-amino thiol esters
Lanny S. Liebeskind (1867210), Hao Yang (328526), Hao Li (31608)   +2 more
core   +2 more sources

Mechanochemistry Meets Catalysis: Metal Complexes for Greener Organic Transformations

Angewandte Chemie, EarlyView.
Mechanochemistry is redefining metal catalysis by controlling catalyst formulation, speciation, and deployment. This Review shows how milling, LAG, RAM, and TSE enable rapid metal‐complex assembly, distinctive catalytic manifolds, and scalable synthesis beyond solution chemistry.
Sourav Behera, Francesco Basoccu, Andrea Porcheddu   +2 more
wiley   +2 more sources

Catalytic Functionalization of Unactivated π‐Bonds Enabled by Bidentate Directing Auxiliaries

Angewandte Chemie, EarlyView.
This review explores how bidentate directing auxiliaries have advanced transition‐metal catalysis for unactivated alkene/alkyne functionalization. By leveraging chelated intermediates, bidentate directing auxiliaries enable precise hydrofunctionalization, difunctionalization, and C─H activation of π‐bonds with unique selectivity and reactivity.
Seunghyeon Cho, Al Vicente Riano D. Lisboa, Juntao Sun, Taeho Kang, Keary M. Engle   +4 more
wiley   +2 more sources

Novas metodologias eficientes para a reação de transferência de diazo: preparação de y-azido-a-diazo-b-ceto éster e aplicações na síntese de amidas e indóis [PDF]

, 2015
Tese (doutorado) - Universidade Federal de Santa Catarina, Centro de Ciências Físicas e Matemáticas, Programa de Pós-Graduação em Química, Florianópolis, 2015.Neste trabalho foram desenvolvidas novas metodologias para a obtenção de diazo compostos 1,3 ...
Dutra, Luiz Gustavo
core  

Designing Polymer Nanocomposites for X‐Ray Shielding: Mechanisms, Architectures, and Scalable Processing

Advanced Engineering Materials, EarlyView.
This review highlights advances in lightweight, lead‐free polymer nanocomposites for diagnostic X‐ray shielding. By linking filler chemistry, dispersion, architecture, and photon interaction mechanisms, it establishes structure–performance relationships guiding material design.
Aklilu G. Messele, Hossein Ipakchi, Tizazu H. Mekonnen   +2 more
wiley   +1 more source