We describe the injection of hot electrons into an aqueous solution by use of a Ta/Ta2O5 electrode. Evidence for this process was obtained by studying the chemically irreversible reduction of N-methylpyridinium ion (NMP+, E° ) -1.37 V vs SHE). The reduction of NMP+ gives rise to a radical which undergoes rapid dimerization to produce a water-insoluble species, 1,1-tetrahydrobipyridine (TBP), th...

Isotope data from bulk carbonates, micrite, marine calcite cements, non-skeletal grains and brachiopods indicate deposition of a wide spectrum of warm to cold water carbonates during the Ordovician and the Jurassic. This isotopic interpretation is supported by warm to cold climatic models proposed for the Ordovician and the Jurassic. These carbonates formed during the Greenhouse mode (condition...

This paper addresses potential application of data on stable carbon and oxygen isotope composition carbonates for study organic rich source rocks the example Late Jurassic–Early Cretaceous Bazhenov Formation (West Siberian petroleum basin, Russia). Geochemical studies were conducted sections located in central (most productive) peripheral (northern southern) regions distribution area, containin...

We investigated calcite veins in two spinel-garnet peridotite xenoliths from the sub-Sierra Nevada mantle. These peridotites represent samples of the lithospheric mantle wedge beneath the Mesozoic California magmatic arc, as indicated by radiogenic isotopic ratios measured on clinopyroxenes separates (Sr/Sr8 Ma= 0.7058-0.7061, Nd/Nd8 Ma= 0.512538-0.512601). Mineral chemistry of the peridotite m...

Pore spaces heterogeneity in carbonates rocks has long been identified as an important factor impacting reservoir productivity. In this paper, we study the heterogeneity of carbonate rocks pore spaces based on the image analysis of scanning electron microscopy (SEM) data acquired at various magnifications. Sixty images of twelve carbonate samples from a reservoir in the Middle East were analyze...

Biyad Formation is mainly made up of clastic sediments that contain substantial amount of proven crude oil in the eastern Yemen. The Byiad clastic is divided into Upper and Lower Biyad clastic units. Several vertical wells have been drilled and penetrated this formation. This study is concerned with the petrophysical evaluation by means of well log data of the Lower Cretaceous rocks at the East...

A micropaleontological study has been carried out on the samples collected from the Sarv Abad section, the oldest and only known Jurassic sedimentary rocks cropping out in the Moghan area. Studied sequence consists of carbonates bounded at both base and top by clastic deposits. Studied carbonate deposits provide an assemblage of benthic foraminifera as well as calcareous algae. The stratigraphi...

In recent decades, chemical surfactants have significantly been utilized in enhanced oil recovery (EOR) process and researchers still a distinctive look to applications of these chemicals. this study, Hexadecyl-tetra Methyl Ammonium Bromide (henceforth; HTMAB) Hexadecyl-Amino-Benzene Sulfonic Acid HABSA) were used as derive relative permeability curves for carbonate rocks. To end, the contact a...

This paper aims to outline some of the key challenges towards a HCI for positive change. Drawing on previous empirical studies concerning the development of positive expressive technologies for social wellness, this paper is a delineation of some of the key challenges in terms of theoretical underpinnings, design and evaluation of technologies that aim to contribute to happy beings in

This panel will take the form of a public debate about whether the conference of which it forms part has a future. Academic conferences are increasingly hard to cost-justify and growing awareness of the environmental impact adds to the negative aspects – especially when the HCI community have developed so many tools and techniques to afford virtual collaboration, dissemination and critique. Yet...