This review focuses on the utilization of organic photodetectors (OPDs) in optical analytical applications, highlighting examples of chemical and biological sensors and lab-on-a-chip spectrometers. The integration of OPDs with other organic optical sensor components, such as organic light emitting diode (OLED) excitation sources and thin organic sensing films, presents a step toward achieving c...

In a vertically-oscillated shallow layer of beads, long-lived localized structures called ’oscillons’ have been observed. These structures oscillate at half of the driving frequency, and may be either in phase or directly out of phase with the driving force at the peak of a cycle. Oscillons interact with eachother and have been observed form linear polymer-like structures and also 2D lattices. ...

introduction: food consumption patterns are changing as a result of health and environmental issues. subsequently, farmers are under increasing pressure to develop and utilize less toxic production methods and pest control. organic agriculture is a production system that sustains the health of soils, ecosystems, and people. it relies on ecological processes, biodiversity, and cycles adapted to ...

in order to study the effects of different nutrition systems (organic, chemical and integrated) and biofertilizer (pgpr) on phenology period, grain yield and its component in sunflower (helianthus annuus l.) an experiment was conducted using alestar cultivar at the research farm of college of agriculture, tarbiat modares university in 2007. five levels of nutrition systems including f1 (100% or...

A large number of calculations of the absorptive partitioning of organic compounds have been made using a number of methods to predict the component vapour pressures, p0, and activity coefficients, γi , required in the calculations. The sensitivities of the predictions in terms of the condensed component masses, volatility, O:C ratio, molar mass and functionality distributions to the choice of ...

Mesoporous organic-inorganic hybrid materials, a new class of materials characterized by large specific surface areas and pore sizes between 2 and 15 nm, have been obtained through the coupling of inorganic and organic components by template synthesis. The incorporation of functionalities can be achieved in three ways: by subsequent attachment of organic components onto a pure silica matrix (gr...

Soil organic carbon has been the most important soil quality measurement factors and has intense relation with soil physical, chemical and biological characteristics. Organic matter and its components are important factors of soil aggregates constitution and stability and play significant role in its structure.So, this research has been done for achieving this purpose. This area is arounding sa...

Flexible linear polymers in a good solvent may be apprOXimated as self-repelling chains. Such a chain is a critical object, having fluctuations similar to those encountered in phase transition phenomena. 1 In particular, the local density p(r) of links (monomers) has power-law correlations over distances r much longer than a link, yet much shorter than the average size of the chain24 (p( r) p( ...