Results 41 to 50 of about 12,560 (208)

Different carboxyl-rich alicyclic molecules proxy compounds select distinct bacterioplankton for oxidation of dissolved organic matter in the mesopelagic Sargasso Sea [PDF]

, 2020
© The Author(s), 2020. This article is distributed under the terms of the Creative Commons Attribution License. The definitive version was published in Liu, S., Parsons, R., Opalk, K., Baetge, N., Giovannoni, S., Bolanos, L. M., Kujawinski, E.
Baetge, Nicholas, Bolaños, Luis M., Carlson, Craig A., Giovannoni, Stephen J., Halewood, Elisa, Kujawinski, Elizabeth B., Liu, Shuting, Longnecker, Krista, Lu, YueHan, Opalk, Keri, Parsons, Rachel J.   +10 more
core   +1 more source

5α-Pregna-1,20-dien-3-one

Acta Crystallographica Section E, 2010
The title compound, C21H30O, was isolated from the soft coral Sinularia sp. The molecule contains four alicyclic rings, all trans-fused, among which three six-membered rings are in different distorted chair conformations while a five-membered ring ...
Guang-ying Chen, Mei-Yan Wei, Ni Tan, Zhen Liu, Rui-Yun Yang   +4 more
doaj   +1 more source

Bio‐Based Polyurethanes: Mechanical Performance, Structure–Property Relationships, and Future Directions

Journal of Polymer Science, EarlyView.
This review examines bio‐based polyurethanes from renewable feedstocks, focusing on structure‐property relationships governing mechanical performance. It analyzes reinforcement strategies, benchmarks against petrochemical counterparts, and explores future directions, including non‐isocyanate routes and circular economy integration for sustainable high ...
Khaled Chawraba, Hussein Medlej, Mohamad Sakr, Akram Hijazi, Abrar Hussain   +4 more
wiley   +1 more source

Synthesis of fused cyclic chromene and alicyclic chromene derivatives from 2-amino-4-[4-(dimethylamino)phenyl]5-oxo-4H,5H-pyrano [3,2-c]chromene-3-carbonitrile

Al-Mustansiriyah Journal of Science, 2017
Derivatives of fused cyclic chromene and alicyclic chromene were synthesized starting from 2-amino-4-[4-(dimethylamino)phenyl]5-oxo-4H,5H-pyrano [3,2-c]chromene-3-carbonitrile. The structures of the synthesized compounds were elucidated by spectral data :
Hamid Hashim Mohammed
doaj   +1 more source

Phthaloylation of amines, hydrazines, and hydrazides by N-substituted phthalimides using recyclable sulfated polyborate

Results in Chemistry, 2022
An efficient, fast, and environmentally gentle protocol for phthaloylation of amines, hydrazines and hydrazides via transamidation is described. The current research focuses on the phthaloylation of alicyclic, aliphatic, aromatic, heterocyclic amines ...
Prerna Ganwir, Swati Jaydeokar, Ganesh U. Chaturbhuj   +2 more
doaj   +1 more source

Gas‐Phase Dehydrogenation of Perhydro Benzyltoluene Using a Commercial Pt on Alumina Catalyst–Stability and Kinetics

Energy Technology, Volume 14, Issue 3, March 2026.
Dehydrogenation of H12‐BT is normally conducted in a multiphasic reaction whereas hydrogen release lowers the partial pressure of H12‐BT and induces H12‐BT evaporation. Due to H12‐BT evaporation major parts of the released hydrogen origin from gas phase dehydrogenation.
M. Geißelbrecht, T. Mader, S. Weigelt, P. Wasserscheid   +3 more
wiley   +1 more source

Scientific Opinion on the safety and efficacy of aliphatic, alicyclic and aromatic saturated and unsaturated tertiary alcohols and esters with esters containing tertiary alcohols ethers (chemical group 6) when used as flavourings for all animal species [PDF]

, 2012
Chemical group 6 consists of aliphatic, alicyclic and aromatic saturated and unsaturated tertiary alcohols and esters with esters containing tertiary alcohols ethers, of which 13 are currently authorised for use as flavours in food.
Buck, Chadha, Court, Crockett, Di Giulio, EFSA (European Food Safety Authority), EFSA (European Food Safety Authority), EFSA Panel on Additives and Products or Substances used in Animal Feed (FEEDAP), EFSA Panel on Food Contact Materials, Enzymes, Flavourings and Processing Aids (CEF), EFSA Panel on Food Contact Materials, Enzymes, Flavourings and Processing Aids (CEF), Gupta, Heymann, Hill, Jobling, Madyastha, Pan, Rahman, Sanz, Serota, Tocher, Wright   +20 more
core   +1 more source

Electrospun Semi-Alicyclic Polyimide Nanofibrous Membrane: High-Reflectance and High-Whiteness with Superior Thermal and Ultraviolet Radiation Stability for Potential Applications in High-Power UV-LEDs

Nanomaterials, 2021
Polymeric nanofibrous membranes (NFMs) with both high whiteness and high thermal and ultraviolet (UV) stability are highly desired as reflectors for ultraviolet light-emitting diodes (UV-LEDs) devices.
Xinxin Zhi, Huasen Wang, Xinying Wei, Yan Zhang, Yuancheng An, Haoran Qi, Jingang Liu   +6 more
doaj   +1 more source

2‐line Ferrihydrite Enhance Microbial Synthesis of Plant Biostimulants in Composted Biosolid by Regulating Phyla Pseudomonadota and Actinomycetota

Advanced Science, Volume 13, Issue 9, 13 February 2026.
This study explores how iron and manganese oxides transform sewage sludge into plant biostimulants during composting. Non‐targeted identification reveals the main species of plant biostimulants. Metagenomic analysis reveals that 2‐line ferrihydrite specifically enriches microbial genes for biosynthesis, boosting plant‐growth promoters.
Yu Zhang, Ziwei Zhang, Zexu Chen, Boyuan Yang, Siying Cai, Jun Chen, Jianhua Guo, Weijun Zhang   +7 more
wiley   +1 more source

New rapid-curing, stable polyimide polymers with high-temperature strength and thermal stability [PDF]

, 1969
Additive-type polymerization reaction forms thermally stable polyimide polymers, thereby eliminating the volatile matter attendant with the condensation reaction.
Burns, E. A., Jones, J. F., Kendrick, W. R., Lubowitz, H. R., Thorpe, R. S., Wilson, E. R.   +5 more
core   +1 more source