Genes Suggest Ancestral Colour Polymorphisms Are Shared across Morphologically Cryptic Species in Arctic Bumblebees

email Suzanne orcd idCopyright: © 2015 Williams et al. This is an open access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited

Superconductivity-induced Resonance Raman Scattering in Multi-layer High-Tc Superconductors

Resonant Raman scattering below Tc has been discovered in several Bi-, Hg-, Tl-based high-Tc superconductors with three or four CuO2-layers. For Bi2Si2Ca2Cu3O10+d, we found an unexpected crossover of the pair-breaking peak in the A1g-spectrum from a broad bump at hw = 6kBTc for Eexc = 2.54eV to a sharp peak at hw = 8kBTc for Eexc = 2.18eV, together with a strong enhancement of the Ca-phonons. Under resonant conditions, the relative positions of the pair breaking peaks in A1g, B1g, and B2g channels are 2Delta(A1g) = 2Delta(B1g) > 2Delta(B2g). This relation implies that the A1g Raman channel is free from the Coulomb screening effect, just as predicted theoretically for a d-wave multi-layer superconductor but have never been observed experimentally thus far. The observed resonance effect is the evidence that the electronic state in the inner CuO2-planes is different from that of the outer CuO2-planes.Comment: 16 pages, 6 figures. submitted to Phys.Rev.

Comparison of methanol to gasoline conversion in one-step, two-step, and cascade mode in the presence of H-ZSM-5 zeolite

In this report, three technological modes for methanol-to-gasoline reaction in the presence of H-ZSM-5 catalyst are compared: (i) direct methanol transformation to hydrocarbons; (ii) two-step (methanol-dimethyl ether-hydrocarbons); and (iii) cascade pathway. Light hydrocarbon gases (methane, ethylene, propylene, and isobutene) and liquid aromatic hydrocarbons (benzene, toluene, xylene, cresol, durol, naphthalene, methylnaphthalene, ethyl naphthalene, isopropyl naphthalene, methyl isopropyl naphthalene, etc.) were found to be the main reaction products. The experimental results showed that the classical two-step methanol to gasoline (MTG) process nowadays remains the most effective for gasoline-range hydrocarbons production, while one-step and cascade schemes require further investigation and the development of reactor systems as well as the operating conditions. The product distribution of MTG synthesis after 120 h on stream in the case of two-step mode was found to be the following: liquid C6–C8 hydrocarbons – 23%; C1–C5 gaseous products – 65%; heavy C9–C12 hydrocarbons – 10%

XII Международные научные чтения памяти Н.Ф. Федорова (к 180-летию со дня рождения философа)

The article deals with the 12th International Research Readings dedicated to the 180th anniversary of Nikolay Fedorov, the outstanding thinker, “father” of native cosmism tradition. The conference started on June 2, 2009 in the Russian State Library. Visiting session in the Fedorov’s homeland, in the Ryazan region has taken place also. Participants and visitors of readings became more than 300 persons.Рассказывается о XII Международных научных чтениях, посвященных 180-летию со дня рождения выдающегося мыслителя, родоначальника традиции отечественного космизма Николая Федеровича Федорова, которые открылись в РГБ 2 июня 2009 г. состоялась также выездная сессия на родине Федорова, в Рязанской области. Участниками и гостями чтений стали более 300 человек

XII Международные научные чтения памяти Н.Ф. Федорова (к 180-летию со дня рождения)

On 12th International Research Readings dedicated to the 180th anniversary from the date of birth of outstanding thinker N. Fedorov, which was held in June 2009 in the Russian State Library.О проведении в Российской государственной библиотеке в июне 2009 года XII Международных научных чтений, посвященных 180-летию со дня рождения выдающегося мыслителя Н.Ф. Федорова