to enhance solubility and the performance of a plant gum (from south peach tree of china, sp gum) as a drilling fluid additive, we explored the potential of modified sp (msp) gum by modifying it with epichlorohydrin. the modification conditions, such as the mass ratio of  the crosslinking agent, ph and temperature, were optimized and the results show that 56.40 g/100g mass ratio of the crosslin...

This paper investigates the potential for eco-certification to improve livelihoods and conserve biodiversity in tropical countries, using the example of a traditional rubber agroforestry practice in Indonesia. Eco-certification has the potential to allow farmers to generate revenue streams by marketing environmental benefits of their practices. However, in the years since eco-certification firs...

This paper presents a novel approach for object detection using a feature construction method called Evolution-COnstructed (ECO) features. Most other object recognition approaches rely on human experts to construct features. ECO features are automatically constructed by uniquely employing a standard genetic algorithm to discover series of transforms that are highly discriminative. Using ECO fea...

in present study, role of agricultural on eco countries regional convergence was assessed in dynamic panel data model. at first, eco countries convergence and agricultural sector effect in convergence acceleration was surveyed by generalized method of moments (gmm) over the period 1996-2005. results showed that, this is convergence between eco countries. in spite of increasing regional growth, ...

Growing social concerns over the environmental externalities associated with business activities are pushing firms to identify activities that create economic value with less environmental impact and to become more eco-efficient. Over the past two decades, researchers have increasingly used frontier efficiency models to evaluate productive efficiency in the presence of undesirable outputs, such...

We sequenced the large terminal repeats (LTRs) present in infectious cloned DNA segments of leukemogenic, mink cell focusforming MCF13 and non-leukemogenic, MCF111A murine leukemia viruses (MuLVs; 1). We compare these sequences with LTRs of AKR ecotropic (AKR ECO; 2), NZB xenotropic (NZB XENO; 3) and MCF247 (4) MuLV DNAs. MCF111A LTR is used as the "standard." Dots show identity; blank space, a...

Eco-P colonies are constructed as natural extension of P colonies with dynamical evolution of environment. P colonies are one of the kind of computational models based on independent autonomous agents represented by membrane systems working and evolving in a shared environment. These acts are based on the set of program associated with every agent. There are two types of agents in eco-P colonie...

BACKGROUND Measuring eCo is rapid, non-invasive and inexpensive tool and correlate correctly with carboxyhemoglobin levels in blood. The aim of this study was to evaluate and compare the increase in end tidal carbon monoxide (eCO) levels in exhaled breath of passive smokers and healthy smokers after cigarette and shisha smoking. FINDINGS In a cross sectional study eCO levels were measured in ...

BACKGROUND Cigarette smoking causes cardiovascular disease and activates markers of endothelial dysfunction or injury. We investigated the nailfold capillary blood velocity (NCV) in cigarette smokers compared to non-smokers. METHODS Forty-eight men (eighteen non-smokers and thirty smokers) were recruited. We measured NCV using nailfold capillary microscopy and exhaled carbon monoxide (ECO) co...