Results 11 to 20 of about 39,253 (260)

Bioprosthetic xenopericardium preserved with di- and penta-epoxy compounds: molecular cross-linking mechanisms, surface features and mechanical properties

open access: yesПатология кровообращения и кардиохирургия, 2018
Background. Heart valve bioprostheses made from glutaraldehyde-treated bovine and porcine pericardia are widely used in open and transcatheter valve surgeries.
I. Yu. Zhuravleva   +9 more
doaj   +1 more source

Studies on Epoxy Compounds

open access: yesKobunshi 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.
Tanaka, Yoshio, Kakiuchi, Hiroshi
  +7 more sources

Ammonia plasma-treated carbon nanotube/epoxy composites and their using in sensing applications

open access: yeseXPRESS Polymer Letters, 2022
Epoxy composites filled by multiwalled carbon nanotubes treated by inductively coupled ammonia plasma were prepared to improve composite intrinsic properties.
Ruhan Benlikaya   +5 more
doaj   +1 more source

The ring opening reaction of indole-2,3-epoxides with acid

open access: yes四川大学学报. 自然科学版, 2023
A series of dihydroindoles 3-ester substituted compounds can be obtained in high yield by the acid ring-opening reaction of epoxy using indole-2,3-epoxy compounds and commercial acids as the main reactants.
FU Kai   +4 more
doaj  

Synthetic Applications of Chiral Unsaturated Epoxy Alcohols Prepared by Sharpless Asymmetric Epoxidation

open access: yesMolecules, 2010
An overview of the synthesis and applications of chiral 2,3-epoxy alcohols containing unsaturated chains is presented. One of the fundamental synthetic routes to these compounds is Sharpless asymmetric epoxidation, which is reliable, highly ...
María Moreno, Antoni Riera
doaj   +1 more source

Charantoside L, A New Cucurbitane-Type Glycoside from

open access: yesNatural Product Communications, 2022
A new cucurbitane-type glycoside ( 1 ) and two known compounds ( 2 - 3 ) were isolated from the ethanol extract of the fruits of Momordica charantia L.
Duong Thi Hai Yen   +7 more
doaj   +1 more source

Epoxiverbindungen – ihre Synthese und Verwendung

open access: yesCHIMIA, 1983
The epoxies are of the wide class of compounds which undergo addition reactions; a series of such compounds susceptible to such types of reaction is listed in the tables attached.
H. Batzer
doaj   +1 more source

Phosphorus-Containing Flame Retardants from Biobased Chemicals and Their Application in Polyesters and Epoxy Resins

open access: yesMolecules, 2019
Phosphorus-containing flame retardants synthesized from renewable resources have had a lot of impact in recent years. This article outlines the synthesis, characterization and evaluation of these compounds in polyesters and epoxy resins.
Jacob Sag   +5 more
doaj   +1 more source

Dammarane-Type Triterpenoids from The Stembark of Aglaia argentea (Meliaceae)

open access: yesJurnal Kimia Valensi, 2018
Two dammarane-type triterpenoids, 20S,24S-epoxy-3α,25-dihydroxydammarane (1) and 3α-acetyl-20S,24S-epoxy-3α,25-dihydroxydammarane (2), have been isolated from the stembark of Aglaia argentea.
Ace Tatang Hidayat   +8 more
doaj   +1 more source

The use of amine and polyetheramine hardeners in end sealing compounds for hollow fiber membrane modules

open access: yesУчёные записки Казанского университета: Серия Естественные науки
The geometry and structure of hollow fiber membranes fabricated from polysulfone by the dry-wet phase inversion method were studied with the help of scanning electron microscopy.
N. P. Bezrukov   +7 more
doaj   +1 more source

Home - About - Disclaimer - Privacy