Journal of Scientific & Industrial Research

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VOLUME 69

NUMBER 6

JUNE 2010

CONTENTS

Review

411

Applications of phytase of thermophilic mould, Sporotrichum thermophile: A review








Bijender Singh & T Satyanarayana

This study presents a review on applications of phytase from thermophilic fungal isolate, Sporotrichum thermophile. Under optimization, improvement in phytase production can be achieved in both solid state (2-fold) and submerged (2.6-fold) fermentations. Phytase could also be produced by alginate-immobilized S. thermophile, and enzyme production was sustainable over 5 repeated cycles. Purified phytase is a homopentameric glycoprotein (mol mass, 456 kD) and is optimally active at pH 5.0 and 60C with a T1/2 of 16 h at 60C and 90 min at 80C. It is insensitive to trypsin and pepsin, and unaffected by EDTA. Phytase has all requisite properties for application as a feed and food additive, dephytinization of soymilk and wheat flour and soil conditioner for plant growth promotion.

Management & Information Technology

415

Determination of system frequencies in mechanical systems during shutdown transient

This study proposed a methodology for system frequency detection of mechanical systems with variable load conditions. Vibration signals from shutting-down transient were analyzed in combined time-frequency domain using wavelet and FFT analyses. Effectiveness of proposed methodology was validated by experimental case study and found that this methodology can be applied to any rotating mechanical system.

 

422

Determination of suitable permutation numbers in comparing independent group means: a monte carlo simulation study







Erkut Akkartal, Mehmet Mendeş &
Emel Mendeş

In this study, suitable number of permutations were tried to be determined empirically for permutation test, one of which alternatively used in analysis of variance (ANOVA). Random numbers were generated from distribution by simulation technique, and type I error rates were calculated with their standard errors. For k=2, 3 and 4, data were dealt with what is commonly faced in practice. Number of observation (n) in each group were taken to be 5, 10 and 15 (except for k = 2). Number of permutation changes with respect to k and n. For k=2, 3 and 4, required number of permutation was determined to be 15,000, 25,000 and 30,000 respectively. In general, there is great advantage of not allowing number of permutation under 10,000, if permutation tests are to be used in testing significance of differences of means of groups.

Management & Information Technology

426

Intuitionistic fuzzy set approach for color region extraction



















Tamalika Chaira

An improvised technique is proposed in detecting and extracting color regions of an image using intuitionistic fuzzy set (IFS) theory. This will be very useful especially for remotely sensed images where different types of regions (agricultural, watery, or volcanic) are to be extracted. Comparing with non-fuzzy and fuzzy method, results of an extracted image were found better due to consideration of uncertainty in the form of a hesitation degree while defining membership function in IFS.

S & T and Industrial Research

433

Voltage rise due to inter-connection of embedded generators to distribution network




S Mekhilef, T R Chard &
V K Ramachandramurthy

This study presents voltage control method to increase embedded generation (EG) transfer capability and to ensure distribution network voltage within statutory limits. A typical EG plant and generic 11 KV distribution network was developed. Various scenarios assessed impact of embedded generator on voltage profiles of a network with light and peak load conditions.

439

Optimisation of heat affected zone by partial swarm optimisation in air plasma cutting operation















K Kadirgama, M M Noor, W S W Harun &
K A Aboue-El-Hossein

This paper presents development of mathematical model for prediction of heat affected zone (HAZ) and optimised parameters for air plasma cutting operation on AISI 6061 aluminium alloy. Experimental and predictive values from RSM are found of same trend. Partial swarm optimisation (PSO) was employed to optimise cutting parameters. Deviation of HAZ obtained by optimised HAZ model is 2.72%. Optimum cutting parameters for minimum HAZ are: output current, 100 A; stand-off gap, 1 mm and pressure, 620.52 kPa.

S & T and Industrial Research

444

Low cost prototype development of electronic knee
























Neelesh Kumar, Sanjeev Soni,
Amod Kumar & B S Sohi

This study presents design and development of an electronic knee, which uses attached sensors, microcontrollers and electro pneumatic valve arrangement to emulate near natural walk. Being all sensors and mechanical assembly developed indigenously, prototype would be a low cost electronic knee.

449

Removal of heavy metal ions from aqueous solutions using chemically (Na2S) treated granular activated carbon as an adsorbent













Ajay Kumar Meena, Chitra Rajagopal,
Kiran & G K Mishra

Removal of Cd(II), Pb(II), Hg(II), Mn(II), Ni(II) and Zn(II) by chemically (Na2S) treated granular activated carbon (GAC) has been found to be concentration, pH, contact time, adsorbent dose and temperature dependent. Adsorption isotherm studies indicated that adsorptive behaviour of metal ions on chemically treated GAC satisfies Langmuir assumptions. Proposed method had potential application for effluent treatment in industries.

454

Production and optimization of cellulase from Fusarium oxysporum by submerged fermentation



G Ramanathan, S Banupriya &
D Abirami

Fusarium oxysporum, isolated from infected tomato plant parts, produced maximum cellulase at optimum parameters (pH, 6.0; temp., 50C; and incubation period, 12 d) in cellulase enzyme production broth having 1% CMC (carboxy methyl cellulose) as a cellulose substrate. Activities of purified cellulases (mol wt, 24, 29 and 45 kDa) were stimulated by concentrations (0-70 mM) of Na+ and Mg++, while EDTA inhibited enzyme activity at all concentrations.

S & T and Industrial Research

460

Studies on Ipomea carnea and Cannabis sativa as an alternative pulp blend for softwood: Optimization of soda pulping process








Dharm Dutt & C H Tyagi

This study presents a blend of Cannabis sativa and Ipomea carnea as a substitute to softwood for soda pulping. Optimized soda pulping conditions are: active alkali, 16% (as Na2O); max. temp., 165C; time (at 165C) 180 min; and liquor to wood ratio, C. sativa, 3.5:1 & I. carnea, 4.0:1. Screened pulp yields were: I. carnea, 47.86% (kappa number 34); and C. sativa, 49.50% (kappa number 33). Anthraquinone (AQ, 0.1%) also improves pulp yield and reduces kappa number, respectively, for: I. carnea, 0.24%, 8 units; and C. sativa, 0.24%, 4 units. At same chlorine demand (5.80%), pulp brightness improved of I. carnea (87.1%) and C. sativa (84%) by CEHH bleaching sequence. Therefore, I. carnea fibers may be used as brightness improver of pulp.

468

Enhanced yield and nutritional quality in green gram (Phaseolus radiata L) treated with seaweed (Kappaphycus alvarezii) extract







S T Zodape, Soumita Mukhopadhyay,
K Eswaran, M P Reddy & J Chikara

This study presents foliar application effect of Kappaphycus alvarezii (5-15%) extract on yield and seed quality of green gram at flowering stage. Application of K. alvarezii (conc. 10.0%) significantly increased seed yield (30.11%) compared to control, due to increase in yield of pods, weight of pods as well as seed yield per plant and 100 seed weight. This treatment also improved nutritional quality of seed with increase in contents of seed as follows: protein, 19.43; carbohydrate, 5.17; P, 3.61; and Mo, 52.63%. Cooking conditions: Active alkali = 16% (as Na2O), Maximum cooking time = 3 h at 1650C, Liquor to wood ratio = 3.5:1 for C. sativa and 4.0:1 for I. carnea, Digester pressure = 6.5 kg/cm2

Energy and Environment

472

Comparative study of bioethanol production from mahula (Madhuca latifolia L.) flowers by immobilized cells of Saccharomyces cerevisiae and Zymomonas mobilis in calcium alginate beads

This study presents ethanol production from mahula flowers in submerged fermentation (SmF) using immobilized cells of Saccharomyces cerevisiae (CTCRI strain) and Zymomonas mobilis (MTCC 92) in calcium alginate as beads. Maximum ethanol concentrations were 154.5 and 134.55 g kg-1 flowers using immobilized cells of S. cerevisiae and Z. mobilis, respectively. Immobilized cells of S. cerevisiae in calcium alginate beads were more effective (14.83% more yield) for ethanol production than immobilized cells of Z. mobilis.

 

Shuvashish Behera, Ramesh C Ray &
Rama C Mohanty

Author-Reader Platform

476

Announcement

479

Instructions to contributors

 
 

Author Index


Abirami D

454

Aboue-El-Hossein K A

439

Akkartal E

422

Amezquita-Sanchez J P

415

 

 

Banupriya S

454

Behera S

472

 

 

Cabal-Yepez E

415

Chaira T

426

Chard T R

433

Chikara J

468

 

 

Dutt D

460

 

 

Eswaran K

468

 

 

Garcia-Perez A

415

 

 

Harun W S W

439

 

 

Kadirgama K

439

Kiran

449

Kumar A

444

Kumar N

444

 

 

Meena A K

449

Mekhilef S

433

Mendeş E

422

Mendeş M

422

Mishra G K

449

Mohanty R C

472

Mukhopadhyay S

468

 

 

Noor M M

439

 

 

Osornio-Rios R A

415

 

 

Rajagopal C

449

Ramachandramurthy V K

433

Ramanathan G

454

Ray R C

472

Reddy M P

468

Romero-Troncoso R J

415

 

 

Satyanarayana T

411

Singh B

411

Sohi B S

444

Soni S

444

 

 

Tyagi C H

460

 

 

Zodape S T

468


Keyword Index


Adsorbent

449

Adsorption

449

Air plasma cutting

439

ANOVA

422

 

 

Bioethanol

472

Black liquor

460

Bleaching

460

 

 

Cannabis sativa

460

Cellulose

454

CMC

454

 

 

Distribution network

433

 

 

Embedded generators

433

Embedded system

444

 

 

Fermentation

454, 472

FFT

415

Fusarium oxysporum

454

 

 

Glucosidase

454

Granular activated carbon (GAC)

449

Green gram

468

 

 

Heat affected zone

439

Hesitation degree

426

Histogram back projection

426

Hormones

468

 

 

Intuitionistic fuzzy set

426

Ipomea carnea

460

 

 

Liquid seaweed extract

468

 

 

Madhuca latifolia

472

Mechanical strength properties

460

Membership function

426

Metal ions

449

Microcontroller

444

 

 

Natural frequency

415

Nutritional quality

468

 

 

Partial swarm optimization (PSO)

439

Permutation test

422

Phytase

411

Phytic acid

411

Plant growth promotion

411

Prosthetic

444

 

 

Region extraction

426

Resampling

422

 

 

Saccharomyces cerevisiae

472

Shutting-down transient

415

Soda pulping

460

Sporotrichum thermophile

411

 

 

Thermophilic mould

411

Type I error

422

 

 

Vibration analysis

415

Voltage rise

433

 

 

Wastewater

449

Wavelet

415

 

 

Yield

468

 

 

Zymomonas mobilis

472