Modeling aqueous alteration of CM carbonaceous chondrites
摘要:
Abstract— Results from an inorganic geochemical modeling study support a scenario in which low‐temperature aqueous alteration of an anhydrous CM asteroidal parent body and melt water from H2O and CO2 ices produces the altered assemblage observed in CM carbonaceous chondrites (chrysotile, greenalite, tochilinite, cronstedtite and minor calcite and magnetite). We consider a range of possible precursor mineral assemblages, varying with respect to the Fe‐oxidation state of the initial anhydrous phases. The aqueous solutions produced by this alteration are generally strongly basic and reducing and a large quantity of H2, and possible CH4, gas can be released during aqueous alteration.
Prepolymeric (meth) acrylates with polycyclic or aromatic segments
申请人:——
公开号:US20030166816A1
公开(公告)日:2003-09-04
The invention relates to monomers according to the formulae
1
as well as curable materials containing these monomers.
本发明涉及符合以下式子的单体
1
以及含有这些单体的固化材料。
414. The halogenation of phenolic ethers and anilides. Part VIII. Alkoxy- and dialkoxy-benzophenones and dialkoxydiphenylsulphones
作者:Brynmor Jones
DOI:10.1039/jr9360001854
日期:——
569. Butadienes and related compounds. Part I. Conversion of asymmetric di-(p-alkoxyphenyl)ethylenes on bromination into the corresponding 1 : 1 : 4 : 4-tetralkoxyphenylbuta-1 : 3-dienes
作者:Wadie Tadros、Gamil Aziz
DOI:10.1039/jr9510002553
日期:——
POLYMERISIERBARE MASSEN AUF DER BASIS VON ZUR AUSHÄRTUNG BEFÄHIGTEN SILOXANVERBINDUNGEN
申请人:ESPE Dental AG
公开号:EP1139973A2
公开(公告)日:2001-10-10
PRÄPOLYMERE (METH)ACRYLATE MIT POLYCYCLISCHEN ODER AROMATISCHEN SEGMENTEN