نتایج جستجو برای: decay organic

تعداد نتایج: 274194  

Knowledge of the decay trend of dead trees and site factors affecting their functions, plays an important role in the development of conservation management plans in forestry projects. This research was conducted in Asalem beech forests in northern Iran to assess the impact of physiographic features of the site on the process of dead trees decay. A total of 90 sample cuts of dead beech stumps w...

Journal: :ACS nano 2011
Stéphane Kéna-Cohen Aeneas Wiener Yonatan Sivan Paul N Stavrinou Donal D C Bradley Andrew Horsfield Stefan A Maier

The use of plasmonic nanostructures for the removal of unwanted long-lived states is investigated. We show that the total decay rate of such a state can be increased by up to 4 orders of magnitude, as compared to its intrinsic radiative decay rate, while leaving other neighboring optical transitions unaffected. For the specific case of molecular triplet excited states, we show that the use of a...

Ahmad Reza Yari, Ali Naghizadeh, Elham Derakhshani,

Background & Aims of the Study: In order to design membrane bioreactors (MBR) properly, it is essential to comprehend the behavior of microorganisms in such wastewater treatment processes. Materials & Methods: In this study, a lab-scale MBR process was operated to determine the biokinetic coefficients of the MBR system under different MLSS concentrations of 6800, 7000, 74...

2014
Sergei A. Ponomarenko Nikolay M. Surin Oleg V. Borshchev Yuriy N. Luponosov Dmitry Y. Akimov Ivan S. Alexandrov Alexander A. Burenkov Alexey G. Kovalenko Viktor N. Stekhanov Elena A. Kleymyuk Oleg T. Gritsenko Georgiy V. Cherkaev Alexander S. Kechek'yan Olga A. Serenko Aziz M. Muzafarov

Organic luminophores are widely used in various optoelectronic devices, which serve for photonics, nuclear and particle physics, quantum electronics, medical diagnostics and many other fields of science and technology. Improving their spectral-luminescent characteristics for particular technical requirements of the devices is a challenging task. Here we show a new concept to universal solution ...

2014
Thomas E Marler Ulysses Ferreras

Intensity of tropical cyclones is expected to increase in the coming century, and an improved understanding of their influence on biogeochemical cycles would benefit ecologists and conservationists. We studied the November 2013 Typhoon Haiyan damage to observe that numerous examples of partial leaf necrosis on intact leaves of trees in the Cycadaceae and Arecaceae families resulted, leaving beh...

Journal: :Proceedings of the National Academy of Sciences of the United States of America 2005
Spiros S Skourtis Ilya A Balabin Tsutomu Kawatsu David N Beratan

We compute the autocorrelation function of the donor-acceptor tunneling matrix element for six Ru-azurin derivatives. Comparison of this decay time to the decay time of the time-dependent Franck-Condon factor {computed by Rossky and coworkers [Lockwood, D. M., Cheng, Y.-K. & Rossky, P. J. (2001) Chem. Phys. Lett. 345, 159-165]} reveals the extent to which non-Condon effects i...

2006
P. D. Archer P. H. Smith

Introduction: Every year, organic material is delivered to Mars primarily in the form of interplanetary dust and other particles smaller than about 1 mm in diameter [1]. These objects are small enough that the organic material they carry is not pyrolized and destroyed in the atmosphere [2]. By modeling the flux of such particles at Earth using satellite, radar, and visual meteor measurements an...

Journal: :journal of sciences islamic republic of iran 0

about 35 samples were collected from lower and upper parts of the proposed frasnianamennian boundary in three sections of upper devonian marine sediments of the kerman province. the biostratigraphical and geochemical studies indicate that about 45% extinction of brachiopods probably caused by the frasnian-famennian bioevents, which is slightly higher than thr rate of devonian-carboniferous exti...

Journal: :Environmental microbiology 2009
D W Hopkins A D Sparrow E G Gregorich B Elberling P Novis F Fraser C Scrimgeour P G Dennis W Meier-Augenstein L G Greenfield

The extremely cold and arid Antarctic dry valleys are one of the most environmentally harsh terrestrial ecosystems supporting organisms in which the biogeochemical transformations of carbon are exclusively driven by microorganisms. The natural abundance of (13)C and (15)N in source organic materials and soils have been examined to obtain evidence for the provenance of the soil organic matter an...

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