Results 11 to 20 of about 282 (137)

6-Hydroxyimino-5α-cholestane [PDF]

Acta Crystallographica Section E Structure Reports Online, 2012
The title compound, C(27)H(47)NO, is a steroid derivative composed of a saturated carbon fused-ring framework with an alkyl side chain. Ring bond lengths have normal values with an average of 1.533 (2) Å, while the cholestane side chain shows an average bond length of 1.533 (2) Å.
Uzzaman, Shams, Khanam, Hena, Mashrai, Ashraf, Mabkhot, Yahia Nasser, Husain, Ahmad   +4 more
openaire   +2 more sources

STEROIDS: PART IV. CONDENSATION OF CHOLESTAN-3-ONE AND CHOLESTANE-3,6-DIONE WITH FORMALDEHYDE [PDF]

Canadian Journal of Chemistry, 1960
Cholestan-3-one and cholestane-3,6-dione were allowed to react under the conditions of the Mannich reaction with paraformaldehyde and amine hydrochlorides. The products obtained proved to be methylene-bis-ketones, and were formulated as di(2,2′-3-oxocholestanyl)methane and di(4,4′-3,6-dioxocholestanyl)methane respectively.
Ted H. Waid, Alfred Taurins
openaire   +1 more source

Iron‐Mediated Release of Aged Dissolved Organic Carbon From Waterlogged Peatland Under Warming

Advanced Science, EarlyView.
This study conducts a five‐year in situ warming experiment in high‐altitude peatlands to examine dissolved organic carbon (DOC) release. The study shows that warming promotes the release of plant‐derived modern DOC in drained peatlands, but amplifies aquatic export of century‐old DOC from waterlogged peatlands via Fe‐mediated DOC mobilization—a ...
Guohua Dai, Zhiying Yang, Zongguang Liu, Wanjia Hu, Lixiao Ma, Enze Kang, Wanqing Luo, Yunpeng Zhao, Chengzhu Liu, Juan Jia, Ting Liu, Chen He, Quan Shi, Jianliang Liu, Yongheng Gao, Huai Chen, Hailong Zhang, Meixun Zhao, Xiaojuan Feng   +18 more
wiley   +1 more source

Seasonal Fluctuations of Plastochromanol‐8 and α‐Tocopherol Amounts in the Leaves of Cecropia Trees

Journal of the American Oil Chemists' Society, EarlyView.
ABSTRACT Plastochromanol‐8 (PC‐8) is a homologue of γ‐tocotrienol with a longer side chain (eight instead of three isoprene units) and therefore also a representative of the tocochromanol (vitamin E) group. PC‐8 has been determined in various plants and seeds, with Cecropia sp. leaves showing unusually high levels.
Rosalie Ormos, Jörg Rau, Walter Vetter
wiley   +1 more source

Pan‐Frying Conditions Affect the Tocopherol Intake From Edible Oils: Results From Temperature Measurements and the Standardized Heating of an Edible Oil

Journal of the American Oil Chemists' Society, EarlyView.
High temperatures in a short time on electric stoves in private homes. Fast loss of tocochromanols using standardized conditions and a miniature heating apparatus. ABSTRACT Tocochromanols (vitamin E compounds) are essential ingredients in human nutrition. Their consumption via edible oils is considered the main source of dietary intake.
Alicia Harter, Alexander Kröpfl, Walter Vetter   +2 more
wiley   +1 more source

Cholestane Glycosides from Solanum abutiloides. III.

Chemical and Pharmaceutical Bulletin, 2000
Four new cholestane glycosides, named abutilosides D (1), E (2), F (3) and G (4), were isolated from the fresh roots of Solanum abutiloides. By chemical and spectroscopic evidence, their structures were elucidated as 26-O-beta-D-glucopyranosyl 3beta,16alpha,26-trihydroxy-5alpha-cholestan-22-one 3-O-beta-D-xylopyranosyl-(1-->2)-alpha-L-rhamnopyranosyl ...
YOSHIMITSU, Hitoshi, NISHIDA, Makiko, NOHARA, Toshihiro   +2 more
openaire   +5 more sources

Sedimentary lycopane/n‐C31 ratio as a proxy for bottom water hypoxia in coastal ocean

Limnology and Oceanography Letters, Volume 11, Issue 5, September 2026.
Abstract Bottom‐water hypoxia on continental shelves is intensifying under climate change and eutrophication, yet long‐term records remain scarce. Here we show that the sedimentary lycopane/n‐C31 ratio reliably records bottom‐water oxygenation in the seasonally hypoxic Yangtze River Estuary.
Qingnan Song, Huamao Yuan, Jinming Song, Guiling Zhang, Fengmin Pan, Xuegang Li, Liqin Duan   +6 more
wiley   +1 more source

Liver‐ and Immune‐Enriched Molecular Signatures Associated With Mortality in Older Adults

Aging Cell, Volume 25, Issue 7, July 2026.
Untargeted plasma proteomics and metabolomics identified molecular signatures associated with all‐cause mortality in older adults. A liver‐enriched proteomic profile was associated with mortality risk in the ILAS cohort and showed consistent associations in an independent validation cohort, supporting circulating proteomic profiles for mortality risk ...
Yi‐Long Huang, Wei‐Ju Lee, Pei‐Lin Lee, Li‐Ning Peng, Fei‐Yuan Hsiao, Liang‐Kung Chen   +5 more
wiley   +1 more source

Causal Interplay Between Inflammatory Cytokines and Lipid Metabolites in Serous Ovarian Carcinoma: Insights From a Genetic Association Study

Journal of Clinical Laboratory Analysis, Volume 40, Issue 12, June 2026.
This study utilizes a two‐sample Mendelian randomization framework to establish a causal link between circulating inflammatory proteins, blood metabolites, and the risk of serous ovarian carcinoma. Our findings identify Interleukin‐8 as a significant risk factor and demonstrate that 1‐Palmitoyl‐GPG (16:0) acts as a metabolic mediator within this ...
Chong‐ze Yang, Lan‐hui Qin, Cheng‐can Huang, Xiao‐li Huang, Ying‐xia Yang, Wei Lan, Miao Fan   +6 more
wiley   +1 more source

Experimental Assessment of the Effects of Substrate Choice on the Duration of Chemical Signals in Fecal Scent‐Marks of Free‐Ranging Iberian Wolves

Journal of Experimental Zoology Part A: Ecological and Integrative Physiology, Volume 345, Issue 5, Page 462-475, June 2026.
ABSTRACT Chemical communication, typically based on feces, urine, and glandular secretions, often deposited as substrate scent marks, plays a key role in social organization and communication among many mammals, especially carnivores. This study assesses experimentally whether the type of substrate chosen for fecal deposition and the temperature ...
Elisa Espartosa, Jose Martin, Isabel Barja   +2 more
wiley   +1 more source