نتایج جستجو برای: nature protecting

تعداد نتایج: 343091  

Journal: :Photochemical & photobiological sciences : Official journal of the European Photochemistry Association and the European Society for Photobiology 2012
Tomáš Solomek Sébastien Mercier Thomas Bally Christian G Bochet

Quantum yields for the photoinduced release of seven different commonly used leaving groups (LGs) from the o-nitroveratryl protecting group were measured. It was found that these quantum yields depend strongly on the nature of the LGs. We show that the quantum efficiency with which the LGs are released correlates with the stabilization that these LGs provide to o-nitrobenzyl-type radicals becau...

2016
Md. Al amin

This article discusses and analyzes the Judicial Activism and its application in protecting environment, and steps taken by judiciary to accelerate this objective. The main objective behind this research is to identify the contemporary picture and study the nature and extent of till date developments in various environmental statuses through judicial procedure. It also analyzes the role of judi...

2006
Wei Deng Solvang Elisabeth Romàn Ziqiong Deng Bjørn Solvang

Protecting and sustaining nature environment are two of the most important conditions regarding economic and social development. While the resources are extracted from and wastes are disposed to the same mother Earth, managing wastes of a value chain has been segmented and treated isolated. This segmentation leads to the partial optimization in waste minimization. This paper proposes a framewor...

2011
V. Gayoso Martínez L. Hernández Encinas C. Sánchez Ávila Victor Miller

Elliptic Curve Cryptography (ECC) is one of the most interesting systems for protecting sensitive information nowadays. The latest versions of the Java Platform include classes and interfaces making ECC available to programmers, but due to the nature of Java it is still necessary to employ additional third party packages in order to use cryptographic operations and procedures related to ECC. In...

Journal: :Organic & biomolecular chemistry 2011
Fabienne Grellepois Jean Nonnenmacher Fabien Lachaud Charles Portella

We report herein the synthesis of enantiomerically pure 2-phenyl- and 2-ethyl-2-trifluoromethylaziridines by Mitsunobu-type cyclisation of the corresponding N-protected amino alcohols, and our results regarding their ring opening with selected nucleophiles. Under basic conditions, N-tosyl aziridines have been regioselectively opened at the less hindered carbon. Under acidic conditions, the regi...

Journal: :Physical review. E, Statistical, nonlinear, and soft matter physics 2008
Shalev Itzkovitz Liran I Shlush Dan Gluck Karl Skorecki

Telomeres are DNA repeats protecting chromosomal ends which shorten with each cell division, eventually leading to cessation of cell growth. We present a population mixture model that predicts an exponential decrease in telomere length with time. We analytically solve the dynamics of the telomere length distribution. The model provides an excellent fit to available telomere data and accounts fo...

2002
Thomas Harte Adrian G. Bors

Watermarking has been used for protecting the copyright information in various data such as audio signals, images and video. Copyright protection of graphical objects and models is important for protecting author rights in animation, multimedia, computer-aided design (CAD), virtual reality, medical imaging, etc. Watermarking techniques in 3D graphical objects are facing new challenges because o...

Journal: :Philosophical transactions of the Royal Society of London. Series B, Biological sciences 2015
Paul J Ferraro Robert L Pressey

Success in conservation depends on our ability to reduce human pressures in areas that harbour biological diversity and ecosystem services. Legally protecting some of these areas through the creation of protected areas is a key component of conservation efforts globally. To develop effective protected area networks, practitioners need credible, scientific evidence about the degree to which prot...

2000
Jessica Brown Brent Mitchell

Introduction very country has landscapes that have been shaped by the interactions of people and nature over time. These landscapes are rich in traditional patterns of land use that have contributed to biodiversity and other natural values, have proven sustainable over centuries, and are living examples of cultural heritage. As countries worldwide move to expand and strengthen their national pr...

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