Results 31 to 40 of about 117,237 (303)
Molecules, 2012 The 80% ethanol extract of Alstonia yunnanensis afforded five new monoterpenoid indole alkaloids: 11-hydroxy-6,7-epoxy-8-oxo-vincadifformine (1), 14-chloro-15-hydroxy- vincadifformine (2), perakine N4-oxide (3), raucaffrinoline N4-oxide (4), and vinorine
Guobiao Liang +5 more
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Scientific Reports, 2022 Bioactive compounds were extracted from a locally available brittle star; Ophiocoma dentata, collected from the Red Sea, Egypt. Two new sesquiterpenoids; 8, 11-epoxy-9(15)-himachaladiene-4-ol (O8-ophiocomane) and, 11-epoxy-9(15)-himachaladiene-4-ol (O7 ...
Shaymaa E. El Feky +7 more
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Kobunshi Kagaku, 1963 エピクロルヒドリンと, 酢酸・n-ブタノールおよびジシクロヘキシルアミンとの反応速度を種々の温度で求め, この反応の活性化エネルギーとエントロピーを求めた。反応生成物の分析と動力学的に求めた反応次数, および“Modified SN2”反応として推定されるエポキサイドの加水分解反応の活性化エントロピーと, この反応の活性化エントロピーとがかなり良く近似していることなどからエピクロルヒドリンと酢酸および酸触媒によるn-ブタノールとの反応は, さきにエポキサイドの酸触媒加水分解反応に対してP. E. Parker, N. S. Issacsが提唱した“Modified SN2”反応と同様の機構で進み, ジシクロヘキシルアミンとの反応は, N. B.
Hiroshi Kakiuchi, Yoshio Tanaka
openaire +4 more sources
The development and characteristics of a hand-held high power diode laser-based industrial tile grout removal and single-stage sealing system [PDF]
, 2002 As the field of laser materials processing becomes ever more diverse, the high power diode laser (HPDL) is now being regarded by many as the most applicable tool.
A. W. Gale +25 more
core +1 more source
Eurasian Chemico-Technological Journal, 2003 New bifunctional oligomers bearing peroxy groups have been synthesized by telomerization in one step reaction. For obtaining oligoperoxides (PO) by telomerization method, epoxide compounds will react with substances containing labile hydrogen atom. Using
M. M. Bratychak +2 more
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A New Bioactive Cembranolide Sarcophytonolide V from Bornean Soft Coral Genus
Natural Product Communications, 2019 A new cembranolide diterpene, sarcophytonolide V ( 1 ), along with 6 known compounds, isosarcophytonolide D ( 2 ), (4 Z ,8 S *,9 R *,12 E ,14 E )-9-hydroxy-1-(prop-1-en-2-yl)-8,12-dimethyl-oxabicyclo[9.3.2]-hexadeca-4,12,14-trien-18-one ( 3 ), (7 E ,11 E
Kazuki Tani +3 more
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Фізика і хімія твердого тіла, 2017 The comparative analysis of definition of stress state of epoxy compounds by hydrostatic shrinkage and tensometric deformationhas been done. The results of the shrinkage coefficient depending on the selected calculation formula have been shown.Key words ...
H. O. Sirenko +3 more
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Phase boundary between Na-Si clathrates of structures I and II at high pressures and high temperatures [PDF]
, 2016 Understanding the covalent clathrate formation is a crucial point for the design of new superhard materials with intrinsic coupling of superhardness and metallic conductivity.
Godec, Yann Le +5 more
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Über die Synthese neuer Epoxyverbindungen
CHIMIA, 1962 Firstly, the different types of epoxy compounds are considered : • Glycidyl ethers, esters, and amines. • Epoxydation products: a) linear aliphatic epoxides, epoxidised fatty acids and fatty acid derivatives and epoxidised polybutadienes; b ...
Hans Batzer, Erwin Nikles
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FEBS Open Bio, EarlyView.Bisphenol A (BPA), a common chemical in plastics, exerts dual effects on bladder cancer cells: low doses promote growth and migration, while high doses suppress growth and migration. Multi‐omics and bioinformatics reveal BPA acts via MAPK and inflammatory pathways.
Shaomin Niu +10 more
wiley +1 more source