Porous Vesicles Research Articles

Porous Vesicles Dispersible in Organic Solvents

The porous vesicles reported so far have hydrophilic surfaces. If the surfaces are chemically modified to be compatible with common organic solvents, their application will be extended. 1,2-Bis[9-(4-vinylbenzyloxycarbonyl)nonanoyl]-sn-glycero-3-phosphocholine (BNPC) was synthesized and used as a polymerizable surfactant for the present study. Vesicles composed of BNPC and cholesterol with embedded divinylbenzene were polymerized, followed by skeletonization (removal of cholesterol) and hydrolysis (cleavage of the ester bonds in BNPC unit). The resulting vesicles (250 nm) whose surfaces contain hydroxyl groups appeared to have holes with diameters up to several tens of nanometers. They were dispersed in water, methanol, tetrahydrofuran, and chloroform. The turbidity of the dispersions decreased as follows: water > methanol > tetrahydrofuran > chloroform. The dispersion in water remained turbid with some precipitates during storage, but those in methanol and tetrahydrofuran appeared to be clear with white ...

Generation Storage and Expulsion of Oil and Gas From Mesaverde Group Coals, Washakie Basin, Wyoming: ABSTRACT

An integrated study of hydrocarbon maturation reactions of coals from the Mesaverde Group (Washakie Basin of Wyoming) demonstrates that these coals are a significant source of both liquid and gaseous hydrocarbons. Petrographic studies of subsurface coal samples from a variety of depths (e.g. thermal exposure) show that with increasing temperatures, oil is generated during alteration of desmocollinite and liptinite macerals info exsudatinite (waxy oil) and inertinite solid residue; the waxy oil is stored in porous structures and vesicles in the coal; significant oil is expelled if the coals are tectonically fractured; and in the absence of tectonic fractures, with increased thermal exposure, the oil is thermally cracked to gas and as a result the coal is fractured and gas is expelled and migrates. Similar hydrocarbon reaction, storage and expulsion scenarios are observed in hydrous pyrolysis experiments designed to simulate the thermal maturation of coal. Compositional studies utilizing supercritical CO[sub 2] extractions and gas chromatography/mass spectrometry show that liquids from natural coal samples, hydrous pyrolysis experiments and oil fields in the Washakie Basin are similar. The data suggests that coal is the main source of the oil and gas associated with the Mesaverde Group in the Washakie Basin.

ChemInform Abstract: A Macrocyclic Tetraether Bolaamphiphile (III) and an Oligoamino α,ω‐Dicarboxylate (V) Combine to Form Monolayered, Porous Vesicle Membranes, which are Reversibly Sealed by EDTA and Other Bulky Anions.

AbstractThe bolaamphiphiles (IIIb)‐(IIId) form vesicles on ultrasonication.

A macrocyclic tetraether bolaamphiphile and an oligoamino .alpha.,.omega.-dicarboxylate combine to form monolayered, porous vesicle membranes, which are reversibly sealed by EDTA and other bulky anions

ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTA macrocyclic tetraether bolaamphiphile and an oligoamino .alpha.,.omega.-dicarboxylate combine to form monolayered, porous vesicle membranes, which are reversibly sealed by EDTA and other bulky anionsJuergen Hinrich. Fuhrhop, Ulrich. Liman, and Volker. KoeslingCite this: J. Am. Chem. Soc. 1988, 110, 20, 6840–6845Publication Date (Print):September 1, 1988Publication History Published online1 May 2002Published inissue 1 September 1988https://doi.org/10.1021/ja00228a037RIGHTS & PERMISSIONSArticle Views391Altmetric-Citations79LEARN ABOUT THESE METRICSArticle Views are the COUNTER-compliant sum of full text article downloads since November 2008 (both PDF and HTML) across all institutions and individuals. These metrics are regularly updated to reflect usage leading up to the last few days.Citations are the number of other articles citing this article, calculated by Crossref and updated daily. Find more information about Crossref citation counts.The Altmetric Attention Score is a quantitative measure of the attention that a research article has received online. Clicking on the donut icon will load a page at altmetric.com with additional details about the score and the social media presence for the given article. Find more information on the Altmetric Attention Score and how the score is calculated. Share Add toView InAdd Full Text with ReferenceAdd Description ExportRISCitationCitation and abstractCitation and referencesMore Options Share onFacebookTwitterWechatLinked InReddit PDF (816 KB) Get e-Alerts Get e-Alerts