An object of the present invention is to provide skin external preparations and cosmetics which contain a branched acyl carnitine and have excellent formulation stability. A skin external preparation of the present invention includes a carnitine derivative represented by the following Formula (1) and/or a carnitine derivative salt represented by the following Formula (2), and an amphoteric surfactant.
In Formula (1), R
1
and R
2
are each independently a C1-18 optionally branched, saturated or unsaturated aliphatic hydrocarbon group. In Formula (2), R
1
and R
2
are the same as in Formula (1), X
−
is a specific anion and Y
+
is a specific cation.
Biocompatible Ionic Liquid Promote One-Pot Synthesis of 2-Amino-4H-Chromenes Under Ambient Conditions
作者:Anlian Zhu、Qixing Li、Wanlu Feng、Dongshuang Fan、Lingjun Li
DOI:10.1007/s10562-020-03332-7
日期:2021.3
The synthesis of 2-amino-4H-chromenes through one-pot multicomponent reactions has received great attention due to the high atom efficiency and the broad bioactivities of the products. Here, the catalytic performances of a series of functional ionic liquids towards this type of reaction were investigated and the results showed that the ionic liquid, choline acetate ([Choline][Ac]), could efficiently
Trimethylglycine complexes with carboxylic acids and HF: solvation by a polar aprotic solvent
作者:Jing Guo、Benjamin Koeppe、Peter M. Tolstoy
DOI:10.1039/c0cp01659d
日期:——
experimental data are explained assuming the combined action of two main effects. Firstly, the solvent ordering around the negatively charged OHX region of the complex (X = O, F) at low temperatures, which leads to a contraction and symmetrisation of the H-bond; this effect dominates for the homo-conjugated cation of betaine. Secondly, at low temperatures structures with a larger dipole moment are preferentially
ENHANCING AGENT FOR DETECTION OF ANALYTE IN SPECIMEN, AND METHOD FOR DETECTING ANALYTE IN SPECIMEN
申请人:ASAHI KASEI KABUSHIKI KAISHA
公开号:US20200326337A1
公开(公告)日:2020-10-15
Detection rapidly and with high detection intensity is accomplished while blackening is inhibited during silver enhancement to detect an analyte in a specimen. One embodiment of the present invention provides an enhancing agent to be used for silver enhancement in detection of an analyte in a specimen by metal labeling and silver enhancement, the enhancing agent including:
(a) a silver-containing compound,
(b) a silver ion-reducing agent, and
(c) a reaction rate controller,
wherein the reaction rate controller (c) is a compound selected from the group consisting of compounds represented by the following formula (I):
(wherein:
R
1
, R
2
and R
3
each independently represent a hydrogen atom or an optionally substituted monovalent aliphatic hydrocarbon group of 1 to 30 carbon atoms, with the proviso that R
1
, R
2
and R
3
are not all hydrogen atoms, or R
1
and R
2
form a 5-membered ring or 6-membered ring and R
3
represents a hydrogen atom or an optionally substituted monovalent aliphatic hydrocarbon group of 1 to 30 carbon atoms;
X represents a divalent hydrocarbon group of 1 to 3 carbon atoms; and
n is an integer of 1 to 3).
Ionic liquid-coated Fe<sub>3</sub>O<sub>4</sub>/APTES/graphene oxide nanocomposites: synthesis, characterization and evaluation in protein extraction processes
A magnetic solid-phase extraction (MSPE) procedure with ionic liquid (IL) coated 3-aminopropyltriethoxysilane (APTES)-Fe3O4 grafted graphene oxide (GO) nanocomposite (Fe3O4/APTES/GO/IL) as adsorbent has been developed for protein extraction.