NOPR Collection:

Enzymatic hydrolysis of chemically pretreated rice straw by two indigenous fungal strains: a comparative study

2010-02-18T16:30:23Z

Title: Enzymatic hydrolysis of chemically pretreated rice straw by two indigenous fungal strains: a comparative study Authors: Singh, Anita; Singh, Namita; Bishnoi, Narsi R Abstract: This study presents pretreatment of rice straw using ethylene diamine, (EDA 28%), hydrochloric acid (HCl 5%) and sodium hydroxide (NaOH 2%) and on-site enzyme production from two Aspergillus species. Pretreated rice straw was enzymatically hydrolyzed with crude cellulase from A. niger and A. heteromorphus. Enzymatic hydrolysis conditions (pH and temperature) were optimized by RSM model. Maximum activity was found by A. niger (FPase, 7.4 IU/g; CMCase, 97 IU/g) and A. heteromorphus (FPase, 9.5 IU/g; CMCase 125 IU/g) in 72 h with EDA pretreated rice straw followed by NaOH and HCl pretreatment. Page(s): 232-237

Thermodynamic analysis of a regenerative gas turbine cogeneration plant

2010-02-16T16:30:28Z

Title: Thermodynamic analysis of a regenerative gas turbine cogeneration plant Authors: Kumar, Ashok; Kachhwaha, S S; Mishra, R S Abstract: Design methodology has been developed for parametric study and thermodynamic performance evaluation of a gas turbine cogeneration system (GTCS). Parametric study showed that compression ratio (r_p), inlet air temperature, turbine inlet temperature, steam pressure and pinch point temperature played a very vital role on overall performance of GTCS. Exergy analysis revealed that most sensitive components in GTCS were combustion chamber and regenerator. Page(s): 225-231

Design optimization of dosa making workstation for smooth ergonomic interface

2010-02-17T16:30:28Z

Title: Design optimization of dosa making workstation for smooth ergonomic interface Authors: Somasundaram, A; Srinivasan, P S S Abstract: This study presents design optimization of Dosa making workstation (DMW) used in preparation of South Indian food, dosa. Anthropometry of South Indian user population is considered in ergonomic interface analysis. Design of Experiments (DOE) was used for optimization of DMW. Four control parameters (shoulder height, arm length of worker, table width and table height of DMW) were considered in design optimization. Proposed parameters (height, 1150 mm; width, 750 mm) reduced risk of musculoskeletal disorder for users and enhanced quality of work at DMW. Page(s): 221-224

Papermaking of mineral fiber composites

2010-02-20T16:30:23Z

Title: Papermaking of mineral fiber composites Authors: Lei, Yun; Yan, Quanxiang; Liu, Shupeng; Yuan, Jizu Abstract: Mineral and hardwood fiber composites were assessed by various factors (folding degree, tensile strength, elongation, tearing strength and tear factor). Performance of wollastonite or sepiolite composites is found higher than that of the same percentage fillers (calcium carbonate, talc) due to interwoven structure between mineral fibers and hardwood fibers. Composites of wollastonite and sepiolite (1: 1) can significantly improve performance of composite fibers due to combined effect of mineral fibers. Page(s): 215-220