Micro-spectroscopic characterization of organic and hydrous components in weathered Antarctic micrometeorites

Comprehensive Organic Analysis of Antarctic Micrometeorites

\Hydrous-Carbonaceous" Micrometeorites on the Early Earth, Moon and Mars

Unmelted large micrometeorites with sizes of about 50-500 m were recovered from the Antarctica and Greenland ice sheets. Their capture in such \space collectors" made of very clean ices, where they got both shielded from most terrestrial contaminants and preserved by deep freeze, allowed for the rst time the investigation of their carbon chemistry. Mass ux measurements in both ice sheets indica...

synthesis of 3-aryl-2h-benzo[b]-1,4-oxazines in [omim]bf4 and reduction of organic compounds in methylimidazolium formate

در این پروژه ترکیبات 3-آریل-2h-بنزو[b]-4،1-اکسازین ها از مواد اولیه تجاری مشتقات دو آمینو فنول و ?-هالو کتون های آروماتیک در مایع یونی 1-اکتیل-3-متیل ایمیدازولیوم تترا فلورو بورات([omim]bf4) سنتز شده است. این واکنش توسط باز پتاسیم کربنات محلول از طریق o-آلکیلاسیون و سپس یک واکنش آمیداسیون درون مولکولی خود بخود در مدت زمان کوتاه انجام می شود. ترکیبات 4،1-بنزوکسازین به این روش با بهره خوب تا آلی ...

Immature Carbonaceous Matter in Concordia Antarctic Micrometeorites

Introduction: Antarctic MicroMeteorites (AMMs) represent the dominant source of extraterrestrial matter accreted by Earth today [1]. Some of them are ultracarbonaceous particles (UCAMMs) [2, 3, 4]. Furthermore, AMMs could have played a role in the origin of life on Earth [e.g. 5]. A better knowledge of their constituent carbonaceous matter could thus shed light on the formation of the organic m...

Mineralogy and Oxygen Isotopes of Unmelted Antarctic Micrometeorites

Introduction: Cosmic spherules and micrometeor-ites account for the major fraction of extraterrestrial material accreting on the Earth. The amount of mi-crometeorites arrived on the terrestrial surface is up to 16000 ton [1], which is around 10 times as much as that of meteorites. The JARE-39 expedition recovered great amounts of micrometeorites from Kuwagata and Tottuki areas in Antarctica in ...