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Journal of Scientific & Industrial Research

 

 

ISSN: 0022-4456

CODEN: JSIRAC (63) (10)  (2004)

VOLUME 63

NUMBER 10

OCTOBER 2004

 

 

CONTENTS

Review Paper

795

Emerging trends in ultra-miniaturized CMOS (complementary metal-oxide-semiconductor) transistors, single-electron and molecular-scale devices : A comparative analysis for high-performance computational nanoelectronics

 

 

 

 

 

 

 

 

 

V K Khanna

Elaborates the current status and trends of the three ultra-small scale integrated circuit technologies, namely nanoscale CMOS, single- and molecular electronics, and carries out a comparative study, highlighting their relative advantages and disadvantages for nanoelectronic computing. To surmount the problems of MOS downscaling, a plausible approach could be to shift from the conventional field-effect transistor-based paradigm to one based on nanostructures. Prospects of solo single-electron logic are gloomy but the concept of a mixed single-electron device/FET multi-valued logic and memory appears to have a bright future. To achieve the ultimate performance, a bottom-up approach will be more fruitful. Molecular electronics starts from the molecular level instead of scaling down old technologies to nanometer level.

IPC Code : Int. Cl.7: H  01  L  29/00, H  01  L 21/336, H  02  L  27/00

Papers

807

Evaluation of agro-industrial wastes for conidia based inoculum production of bio-control agent: Trichoderma harzianum

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Lakshmi Tewari & Chandra Bhanu

For management of agro-industrial wastes and selection of a suitable cheaper substrate for biopesticide development, three categories of agro-industrial wastes, viz. (i) Cellulosic wastes, (ii) Organic manures, and (iii) Cereal brans are evaluated for growth responses and conidial yield of the bio-control agent Trichoderma harzianum. Paper waste based mixed substrate combination containing paper waste, rice bran and chickpea flour shows considerably higher conidial yield after 10 d incubation period, exploring the possibility of utilizing it for mass multiplication and large- scale inoculum production of ecofriendly bio-control agent for sustainable environment.

IPC Code : Int. Cl.7 : A  01  N  65/00

 

813

Biosorption of copper from aqueous solution using algal biomass

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Narsi R Bishnoi, Anju Pant & Garima

Sorption experiments using the dead biomass of Spirogyra species, for copper removal are carried out to study the influence and optimization of the biosorption. The effect of pH, initial metal ion concentration, different contact periods, varying temperature and varying biomass quantities are also examined. It is observed that Spirogyra species possess better specific uptake capacities for Cu (II), showing approximate uptake of 34.94mg/g of biomass. Spirogyra species has shown much better sorption in the pH between 6.0 – 7.0 and at contact time of 30 min.

 

IPC Code : Int. Cl.7 : C  12  R  1:89

 

817

Assay of captopril by residual base neutralisation methods

 

 

 

 

 

 

K Basavaiah & H C Prameela

Two simple and rapid methods based on two techniques, viz. titrimetry and spectrophotometry are described for the determination of captopril (CPT) in bulk drug and in pharmaceutical formulations. In titrimetry the drug solution is treated with a measured excess quantity of sodium hydroxide followed by back titration of the residual base with hydrochloric acid using phenol red-bromothymol blue as mixed indicator. The methods are applied successfully for the determination of captopril in pharmaceutical formulations. The validity of the methods is evaluated by parallel determinations using a reference method and by recovery studies.

IPC Code : Int. Cl.7 : A  61  K  9/00

820

Studies of polysulphide pulping of Populus deltoides

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 Suhail Akhtar Rao & J S Upadhyaya

The presnet study deals with polysulphide (PS) pulping of Populus deltoides. The benefits are in terms of increased pulp yield without considerably affecting the quality of the pulp. The tear and burst values of the PS pulps are found to be slightly lower, while the tensile index values are found to be comparable with that of kraft pulp. The results demonstrate the better utilization of fibrous raw material for paper-making in terms of increased pulp yield and better physical and other strength properties of paper.

 IPC Code : Int. Cl.7 : D 21 B 1/00

 

826

Effects of different treatments on physico-chemical properties of rice starch

 

 

 

 

 

 

 

 

 

P Bhattacharyya, U Ghosh, U Roy Chowdhuri, P Chattopadhyay & H Gangopadhyay

Three different gelatinization processes are performed – boiling in water, steam heating, and enzymatic digestion. The effects of gelatinization on viscoelastic property of rice starch are measured 3- D structural changes of rice starch after different treatments are determined by SEM. Various grooves and fissures on the exterior surface of the granules are noticed in the treated sample compared to control.

IPC Code : Int. Cl.7 : C 12 P 7/10

 

830

Studies on effect of titanate coupling agents on the mechanical properties of clay filled chloroprene rubber

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Nabil A N Alkadasi, Bhimrao D Sarwade,
D G Hundiwale & U R Kapadi

Effect of treatment of titanate coupling agent on clay is studied with chloroprene as a matrix. Composites are made with varying proportion of untreated and treated clay. A two-roll mill is used for dispersing the filler in the rubber and compression moulding technique is used to cure the compound in sheet form. Comparison of properties of composites filled with treated and untreated clay establishes that treatment of clay imparts better reinforcing properties. Tensile strength is improved by 166 per cent, while modulus at 400 per cent is improved by 167 per cent. Similarly, Young’s modulus is improved by 155 per cent.

 IPC Code : Int. Cl.7 : C 01 B 51/024, C 01 B 21/098

 

835

Three new methods for the assay of albendazole using N-chlorosuccinimide

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

  

 

K Basavaiah & P Nagegowda

Two titrimetric and one spectrophotometric methods are described for the determination of albendazole in pure form and in formulations. In direct titrimetric procedure the drug is titrated directly with N-chlorosuccinimide solution in hydrochloric acid medium using indigo carmine as indicator. In back titrimetry the drug is treated with a measured excess of the oxidant in acetic acid medium followed by the determination of the residual oxidant iodometrically. Spectrophotometry, involves the addition of a known excess of N-chlorosuccinimide to albendazole in hydrochloric acid medium followed by the determination of surplus oxidant by oxidation and complexation reactions involving iron (II) and thiocyanate. The proposed methods are applied successfully for the determination of albendazole in pharmaceutical formulations with mean recoveries of 97.36 to 102.36 per cent. The excipients present in formulations do not interfere. The accuracy and reliability of the methods are further established by parallel determination by the reference method, and by recovery studies.

IPC Code : Int. Cl.7 : A 61 K 9/00

 

Note

842

Development of portable metal oxide gas sensor for the detection of foul odour 

 

 

 

 

 

 

 

 

 

 

 

Ghanshyam, Sunita Mishra, A K Sharma,
N Ram, Satinder Singh, R P Bajpai & R K Bedi

Discusses the design and development of the portable and low cost metal oxide based gas sensor for the foul odour applications. The substrate design the sensor parameters and the proposed in-house works are described.

IPC Code : Int. Cl.7 : B 01 D 53/48

 

Report

846

Electron microscopy and allied fields¾A report

 

R S Beniwal

 

Book Reviews

855

  • Pesticide formulation : Theory and practice

              Reviewer : R L Gupta

         ·     Lessons in six sigma : 72 must know truths for managers

              Reviewer : V K Gupta

Sci-Tech Update

858

·         Industry’s first embedded linux 2.6 offering by Lynux Works Inc.

 

·         Lynux OS hard real-time operating system

 

·         Industrial cluster in relation to remote sensing industry

 

·         Knowledge–based industrial clusters

 

·         Innovative knowledge society

 

·         New type of nanotube made of gold or silver created

 

·         Underwater windmills to harness tidal powers

 

·         Simple method for management of tape storage environments

 

·         Superconductor technology applied to power devices

 

·         New drug treatment for bipolar disorder

 

·         New standard for germanium containing semiconductors released

 

·         New addititives for automotive industry

 

 
Author Index

 

Alkadasi Nabil A N

830

Gangopadhyay H

826

Prameela H C

817

Bajpai R P

842

Garima

813

Ram N

842

Basavaiah K

817

Ghanshyam C

842

Rao Suhail Akhtar

820

Basavaiah K

835

Ghosh U

826

Roy Chowdhuri U

826

Bedi R K

842

Hundiwale D G

830

Sarwade Bhimrao D

830

Beniwal R S

846

Kapadi U R

830

Sharma A K

842

Bhanu Chandra

807

Khanna V K

795

Singh Satinder

842

Bhattacharyya P

826

Mishra Sunita

842

Tewari Lakshmi

807

Bishnoi Narsi R

813

Nagegowda P

835

Upadhyaya J S

820

Chattopadhyay P

826

Pant Anju

813

 

 

 

Keyword Index

 

Albendazole

835

Halitosis

842

Quantum dots

795

Algal biomass

813

Malodour

842

Rice starch

826

Bio-control agent

807

Mass multiplication

807

SEM

826

Biological control

807

Mechanical properties

830

Single-electron transistor

795

Biosorptron

813

Metal oxide gas sensor

842

Sodium hydroxide

817

Captopril

817

Molecular electronics

795

Spectrophotometry

817, 835

Chloroprene rubber

830

Nano materials

846

Spirogyra

813

Clay

830

Nanocells

795

Steam heating

826

Composites

830

Nanotechnology

795

Supplementation

807

Computers

795

N-chlorosuccinimide

835

Texture

826

Copper (II)

813

Polysulphide pulping

820

Titanate coupling agent

830

Electron microscopy

846

Populus deltoides

820

Titrimetry

817, 835

Formulations

835

Pulping

820

Trichoderma harzianum

807

Gelatinization

826

Volatile sulphur compounds

842