Hafiz Abdullah Shakir

Statistical optimization for deconstruction of poplar substrate by dilute sulfuric acid for bioethanol production

ABSTRACT In this study, response surface methodology was used to study the effects of H2SO4, concentrations, substrate loading and residence time on liberation of reducing sugars (RS), total sugars (TS) and total phenolic compounds from poplar leaves and twigs. Box–Behnken design with three variables and three levels showed maximum release of total phenolic compounds (57.39 mg/ml) corresponding to 0.8% H2SO4 concentration, 15% substrate level with residence time of 4 h. Under these conditions, the TS and RS released up to 161.20 and 5.24 mg/ml, respectively. Analysis of the pretreated substrate by Fourier transform infra-red and X-ray diffraction revealed the effectiveness of pretreatment conditions. Second-order polynomial equation using analysis of variance was employed for analyzing the results. The proposed model was found very significant with F-value of 48.39. The R2 and adjusted R2 values also revealed the accuracy of predicted response. GRAPHICAL ABSTRACT

Process Optimization for Endoglucanase Production by in Submerged Fermentation

Muhammad Irfan, Umar Asghar, Muhammad Nadeem, Hafiz Abdullah Shakir, Javed Iqbal Qazi, Rubina Nelofer, Quratulain Syed Department of Zoology, University of the Punjab New Campus, Lahore, Pakistan. Food & Biotechnology Research Centre (FBRC), Pakistan Council of Scientific and Industrial Research (PCSIR) Laboratories Complex, Ferozepure Road, Lahore, Pakistan. Department of Zoology, University of the Punjab New Campus, Lahore, Pakistan. Food & Biotechnology Research Center, PCSIR Labs Complex, Ferozpure Road, Lahore Pakistan.

Effect of different levels and frequency of concentrate feeding on growth performance and carcass characteristics of Texel cross lambs

TH1 0.648 0.624 0.725 0.719 0.846 0.802 TH2 0.557 0.543 0.652 0.624 0.784 0.748 TH3 0.363 0.361 0.471 0.470 0.578 0.565 CON 0.736 0.731 0.813 0.797 0.892 0.858 200 TH1 0.650 0.650 0.739 0.720 0.797 0.796 TH2 0.605 0.607 0.667 0.675 0.734 0.747 TH3 0.414 0.418 0.463 0.484 0.534 0.574 CON 0.743 0.740 0.802 0799 0.859 0.852 BC: BayesC, GB: GBLUP

Effects of anthropogenic activities on some biochemical parameters of Catla catla, from the river Ravi, Pakistan.

TH1 0.648 0.624 0.725 0.719 0.846 0.802 TH2 0.557 0.543 0.652 0.624 0.784 0.748 TH3 0.363 0.361 0.471 0.470 0.578 0.565 CON 0.736 0.731 0.813 0.797 0.892 0.858 200 TH1 0.650 0.650 0.739 0.720 0.797 0.796 TH2 0.605 0.607 0.667 0.675 0.734 0.747 TH3 0.414 0.418 0.463 0.484 0.534 0.574 CON 0.743 0.740 0.802 0799 0.859 0.852 BC: BayesC, GB: GBLUP