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The objective of the present study was to investigate the effects of role conflict and role ambiguity on employee's creativity. Exactly how role stress and various performances of individuals are related has received considerable attention, in which stress has been found to affect individual creativity. However, exactly how role stress (role conflict and role ambiguity) and employee creativity are related has seldom been examined empirically. A sample size of 100 was selected and standard questionnaires were distributes among the employees of three public sector universities in Peshawar KPK Pakistan. The conclusions drawn from the study were that role conflict and role ambiguity have negative relationship with employees creativity. Implications of the findings of this study and possible directions for future research are also discussed. [ABSTRACT FROM AUTHOR]

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Assessing trends of hydrometeorological variables is necessary for climate change modeling, accurate water resources management and improved regional planning. This study investigated the seasonal, annual, maximum (max.) and mean rainfall trend using data from 1986 to 2013 collected from three selected gauge stations including Tarbela, Daggar and Saidu sharif. Similarly, the historic data (1986 to 2013) of flow of Brandu river and max. and minimum (min.) temperature of Tarbela and Saidu Sharif gauge station were analysed. To identify trends for the hydrometeorological parameters, both non-parametric and parametric (MK) tests were applied at 10% significant level. The study concludes, a mixture of increasing and decreasing trends. Annual max. rainfall exhibited an increasing trend in the study area. Similarly, total annual and mean annual rainfall for Daggar and Saidu Sharif gauge stations showed decreasing trend while Tarbela gauge station exhibited an increasing trend. Statistically significant trends were found for annual total rainfall. [ABSTRACT FROM AUTHOR]

This work is aimed at exploring the efficiency of a novel H2O2 modified activated carbon (PA-AC-HO) prepared from used tea leaves (UTLs) for the removal of toxic cationic dye, malachite green (MG) from aqueous systems. The surface properties of PA-AC-HO were analyzed by FTIR spectroscopy, scanning electron microscopy (SEM), BET surface area (SBET), Boehm's titration and point of zero charge (pHPZC), thermogravimetric (TG/DTA) and X-rays diffraction (XRD) analysis. Results showed that PA-AC-HO has sufficient number of acidic functional groups and pHPZC value lies in the acidic region. The SEM study confirmed that the adsorbent external surface is highly porous with BET surface area of 1,097.68 (m² g-1) and total pore volume of 0.83 cm3 g-1. Proximate-ultimate analysis showed high carbon and oxygen content of PA-AC-HO with amorphous nature. The adsorption characteristics of PA-AC-HO for the uptake of MG were studied by batch method. The dye uptake capacity and rate was found to increase with increasing contact time, dye initial concentrations and solution pH, but showed a decreasing trend with increasing salt ionic strength. Kinetic investigation revealed that adsorption of MG followed pseudo-second order model while the equilibrium isotherm data fitted the Langmuir and Temkin models well and maximum adsorption capacity was found to be 454.55 mg g-1. Thermodynamic investigation showed spontaneous and endothermic nature of the adsorption. Regeneration of dye loaded adsorbent was carried out by five consecutive cycles which showed good regeneration capacity. [ABSTRACT FROM AUTHOR]

Water decontamination from chromium (Cr) is of prime importance because of its carcinogenic nature. The sample of activated carbon was characterized by surface area analyzer, SEM/EDX, TGA, FTIR and PZC. This study was focused on adsorption of hexavalent chromium from the aqueous phase onto activated carbon. Both the temperature and pH had a positive effect on the chromate uptake by activated carbon. The chromate uptake at different pH values followed the trend: pH 2 > pH 3 > pH 5 > pH 7 > pH 8. The sorption maxima at pH 2 was explained on the basis of electrostatic attraction between the negatively charged chromate anions and positively charged surface of the activated carbon. Different models were tested to access the sorption maxima and to probe into the chromate adsorption mechanism. The thermodynamic parameters suggested that heat is needed to shift the hexavalent chromium from solution to the solid surface. It was concluded that the anion exchange sorption was involved in removing the chromate anion from the aqueous system into the surface of activated carbon. [ABSTRACT FROM AUTHOR]

Study and research of Bt (Bacillus thuringiensis) transgenic plants have opened new ways to combat insect pests. Over the decades, however, insect pests, especially the Lepidopteran, have developed tolerance against Bt delta-endotoxins. Such issues can be addressed through the development of novel toxins with greater toxicity and affinity against a broad range of insect receptors. In this computational study, functional domains of Bacillus thuringiensis crystal delta-endotoxin (Cry1Ac) insecticidal protein and vegetative insecticidal protein (Vip3Aa) have been fused to develop a broad-range Vip3Aa-Cry1Ac fusion protein. Cry1Ac and Vip3Aa are non-homologous insecticidal proteins possessing receptors against different targets within the midgut of insects. The insecticidal proteins were fused to broaden the insecticidal activity. Molecular docking analysis of the fusion protein against aminopeptidase-N (APN) and cadherin receptors of five Lepidopteran insects (Agrotis ipsilon, Helicoverpa armigera, Pectinophora gossypiella, Spodoptera exigua, and Spodoptera litura) revealed that the Ser290, Ser293, Leu337, Thr340, and Arg437 residues of the fusion protein are involved in the interaction with insect receptors. The Helicoverpa armigera cadherin receptor, however, showed no interaction, which might be due to either loss or burial of interactive residues inside the fusion protein. These findings revealed that the Vip3Aa-Cry1Ac fusion protein has a strong affinity against Lepidopteran insect receptors and hence has a potential to be an efficient broad-range insecticidal protein. [ABSTRACT FROM AUTHOR]

Biosorpt ion of Mn (II) from aqueous solut ion by P. Ostreatus was invest igated at different concentrations, pH and temperature. The close agreement between the experimental and theoretical biosorption capacity confirmed that Pseudo 2nd order equat ion is best fitted to the present experimental data. The biosorption capacity of P. Ost reatus was observed to be dependent upon the pH and temperature of adsorpt ion system. The values of biosorpt ion maxima (Xm) and binding energy constant (Kb) were observed to decrease with rise in temperature in the range of 298 - 323K. The negative values of ΔG and ΔH showed the process of Mn (II) biosorpt ion onto P. Ost reatus is spontaneous and exothermic respectively. Similarly, the values of isosteric heat of biosorption (ΔD) were decreased with increase in surface coverage (e) which indicated that the surface of the P. Ostreatus is energet ically heterogeneous in nature. [ABSTRACT FROM AUTHOR]