Mercury pollution threatens the environment and human health across the globe. This neurotoxic substance is encountered in artisanal gold mining, coal combustion, oil and gas refining, waste incineration, chloralkali plant operation, metallurgy, and areas of agriculture in which mercury-rich fungicides are used. Thousands of tonnes of mercury are emitted annually through these activities. With ...

Fiber reinforced plastics (FRP) products being strong and light in weight, find extensive applications in automobiles, marine, structural and household components. Unsaturated polyester (UP) resin is a principle binder material used in FRP products. Curing of UP resin is a key for successful FRP processing. Gel time (tgel) and peak exothermic temperature (θpeak) are critical measures of curing ...

condensation of aromatic aldehydes with benzoyl acetone under specified conditions yieldedtwo series of polycarbonyl compounds in which the keto group is attached to olefinic linkage.spectral and analytical data revealed the formation of an unsaturated triketone from pyridine-3-carbaldehyde and unsaturated diketone from furfural, salicylaldehyde and 2-hydroxynaphthaldehyde. analytical, ir, 1h n...

Constitutive equations of unsaturated soils are often derived in a thermodynamically consistent framework through the use a unique ’effective’ interstitial pressure. This later is naturally chosen as the space averaged interstitial pressure. However, experimental observations have revealed that two stress state variables were needed to describe the stressstrain-strength behaviour of unsaturated...

Several existing equations for solving the non-linear soil-hydraulic properties are introduced and validated to field and laboratory measured data. Models for non-linear hydraulic properties of unsaturated porous media arise from statistical and mathematical fit through the measured data and they can be expressed in forms of unsaturated permeability versus either pressure head or volumetric moi...

Two classes of Escherichia coli unsaturated fatty acid auxotrophs, which are complementary both in vivo and in vitro, have been utilized to study unsaturated fatty acid synthesis. /3 Hydroxydecanoyl thioester dehydrase, which catalyzes the first committed reaction in the unsaturated fatty acid synthetic pathway, is defective in one class, fab A. The defect in the second class, fab B, was unknow...

The introduction of structural defects in metal-organic frameworks (MOFs), often achieved through the fractional use defective linkers, is emerging as a means to refine properties existing MOFs. These missing coordination fragments, create unsaturated framework nodes that may alter MOF. A property-targeted utilization this approach demands an understanding structure defect-engineered We demonst...

This review is devoted to relatively new and promising approach the synthesis of novel organic compounds polymer materials, based on “click chemistry” concept. Several types reactions” (cycloaddition, nucleophilic ring opening, non-aldol carbonyl chemistry, addition multiple carbon-carbon bonds) have been described, relevant examples provided. The “thiol-ene” reactions thiol unsaturated functio...

In this research, a method was used to increase the brittleness of unsaturated polyester polymer by mixing it with vinyl ester. The choice ester toughness is because easy form and material has wide applications in engineering. However, several weaknesses, namely, very stiff, brittle, unable withstand cracking loads breaks easily due impact. Polyester rigid nature cross-chain links that are tigh...