Results 61 to 70 of about 12,560 (208)

Criss-cross Cycloadditions on Ketazines Derived from Alicyclic Ketones

Molecules, 2006
The reactivity of alicyclic ketazines in criss-cross cycloadditions was investigated. They react with potassium cyanate and ammonium thiocyanate in the presence of acetic acid to form spirocyclic perhydro[1,2,4]triazolo[1,2-a][1,2,4]triazole-1,5-diones ...
Milan Potacek, Jiri Verner
doaj   +1 more source

(25R)-5a-Spirostane-3,12-dione

Acta Crystallographica Section E, 2009
The title compound, C27H40O4, was obtained from the oxidation of (25R)-3b-hydroxy-5a-spirostan-12-one (Hecogenin) by Jone's reagent. The molecule contains six alicyclic and heterocyclic rings, all trans-fused, among which four six-membered rings adopt ...
Ling-Li Zheng, Ming-Yong Yuan, Zhi-He Zang, Tie-Ying Zi   +3 more
doaj   +1 more source

Experimental Analyses Emphasize the Stability of the Meisenheimer Complex in a SNAr Reaction Toward Trends in Reaction Pathways

Frontiers in Chemistry, 2020
The mechanism of SNAr reactions between 2-chloro-5-nitropyrimidine with primary and secondary alicyclic amines, respectively, have been studied by kinetic measurements.
Paola R. Campodónico, Belén Olivares, Ricardo A. Tapia   +2 more
doaj   +1 more source

Temperature Thresholds Govern Microbial‐Mediated Dissolved Organic Carbon Dynamics in Coastal Ecosystems

Advanced Science, Volume 13, Issue 2, 9 January 2026.
Coastal dissolved organic carbon (DOC) represents one of the largest reduced carbon pools on Earth, and they are influenced by temperature. Across 7.6–35.9 °C ranges, the microbial‐mediated DOC dynamics is characterized by three temperature thresholds.
Junfu Dong, Xiao Chen, Fangshuai Chen, Zhenzhen Hu, Qichao Tu, Gang Li, Chen He, Quan Shi, Qiang Zheng, Feng Chen, Tuo Shi, Nianzhi Jiao, Jihua Liu   +12 more
wiley   +1 more source

Autonomous Polymer Frameworks for Sustainable Tissue‐Interfaced Plastic Bioelectronics

Advanced Science, Volume 13, Issue 4, 19 January 2026.
This review focuses on plastic bioelectronic systems integrated with autonomous polymer frameworks (auto‐POFs) and summarizes recent progress in this field. It provides an in‐depth analysis of the design strategies and operational mechanisms of auto‐POFs, highlighting their pivotal role in enhancing the sustainability and interfacial adaptability of ...
Elvis K. Boahen, Zhengyang Kong, So Young Kim, Hayoung Oh, Hanseo Yoo, Jeong Sub Lim, Hyun Joon Shin, Ji Hong Kim, Do Hwan Kim   +8 more
wiley   +1 more source

Artemisinin: From Chinese Herbal Medicine to Modern Chemotherapy [PDF]

, 2019
Malaria is a disease that has blighted humankind since early times. The first antimalarial treatment available to Europeans was the dried bark of the cinchona tree from Peru. The main problem in its use was adulteration by other material.
Butler, Anthony
core   +1 more source

EFSA CEF Panel (EFSA Panel on Food Contact Materials, Enzymes, Flavourings and Processing Aids), 2014. Scientific Opinion on Flavouring Group Evaluation 74, Revision 3 (FGE.74Rev3): Consideration of Simple Aliphatic Sulphides and Thiols evaluated by the JECFA (53rd and 61st meeting) Structurally related to Aliphatic and Alicyclic Mono-, Di-, Tri-, and Polysulphides with or wi thout Additional Oxygenated Functional Groups from Chemical Group 20 evaluated by EFSA in FGE.08Rev5 (2012) [PDF]

, 2014
The Panel on Food Contact Materials, Enzymes, Flavourings and Processing Aids of the European Food Safety Authority was requested to consider evaluations of flavouring substances assessed since 2000 by the Joint FAO/WHO Expert Committee on Food Additives
Aeschbacher, Brams, Cox, Cox, Cramer, Dooley, Dorange, EC (European Commission), Eder, Eder, EFSA (European Food Safety Authority), EFSA CEF Panel (EFSA Panel on Food Contact Materials, Enzymes, Flavourings and Processing Aids), EFSA CEF Panel (EFSA Panel on Food Contact Materials, Enzymes, Flavourings and Processing Aids), EFSA CEF Panel (EFSA Panel on Food Contact Materials, Enzymes, Flavourings and Processing Aids), EFSA CEF Panel (EFSA Panel on Food Contact Materials, Enzymes, Flavourings and Processing Aids), EFSA CEF Panel on Food Contact Materials, Enzymes, Flavourings and Processing Aids, EFSA CEF Panel on Food Contact Materials, Enzymes, Flavourings and Processing Aids, Hakura, JECFA (Joint FAO/WHO Expert Committee on Food Additives), JECFA (Joint FAO/WHO Expert Committee on Food Additives), JECFA (Joint FAO/WHO Expert Committee on Food Additives), Kim, LaVoie, Lee, Marks, Mc Garry, Mondino, Morgareidge, Morgareidge, Morgareidge, Musk, Pence, Posternak, Rennen, SCF (Scientific Committee for Food), Shellenberger, Stien, Watanabe, Watanabe, Wild, Zeiger   +40 more
core   +3 more sources

Multicomponent polyimide films for enhanced energy storage

e-Polymers
Polymer dielectric films have extensive applications in power systems, pulse power systems, hybrid vehicles, and clean energy. However, with advancements in energy storage technology and increasingly demanding operating environments, particularly under ...
Hu Jinglong, Liu Minjiang, Xia Yuxin, Li Yan, Xu Xiaoyan   +4 more
doaj   +1 more source

Towards Carbon Neutralization: Clean and Efficient Use of Coal

Carbon Neutralization, Volume 5, Issue 1, January 2026.
This paper provides a comprehensive exploration of the clean and efficient utilization of coal resources, with a particular emphasis on the potential of coal chemical technology, carbon materials, and CCUS technology, and the opening up of innovative pathways for the utilization of coal resources.
Xin Wen, Wei Song, Xue Wang, Chunrong He, Xinyue Chen, Ting Wang, Penggao Liu   +6 more
wiley   +1 more source

EFSA Panel on Food Contact Materials, Enzymes, Flavourings and Processing Ai ds (CEF); Scientific Opinion on Flavouring Group Evaluation 208 (FGE.208): Consideration of genotoxicity data on representatives for 10 alicyclic aldehydes with the α , β - unsaturation in ring / side - chain and precursors from chemical subgroup 2.2 of FGE.19 b y EFSA [PDF]

, 2013
The Panel on Food Contact Materials, Enzymes, Flavourings and Processing Aids of the European Food Safety Authority was requested to evaluate the genotoxic potential of one flavouring substance from subgroup 2.2 of FGE.19 in the Flavouring Group ...
Bowen, Chen, Eder, EFSA (European Food Safety Authority), EFSA (European Food Safety Authority), EFSA (European Food Safety Authority), Fujita, Hayashi, Ishidate, JECFA, Kuroda, Lloyd, Lloyd, Sasaki, SCF, Suzuki, Suzuki, Tayama, Yoo   +18 more
core   +2 more sources