Development of Fine Denier Silkworm Hybrid CSR48×CSR5 of Bombyx mori L. for Superior Quality Silk

( G. V. Kalpana ),( N. Suresh Kumar ),( H. K. Basavaraja ),( N. Mal Reddy ),( A. K. Palit ) 한국잠사학회 2005 International Journal of Industrial Entomology Vol.10 No.2

Serious attempt for the improvement of quality parameters in silkworm hybrids came rather very late in India. Realising the need for productive breeds to the field and reorientation in breeding methodology, the silkworm breeders of CSRTI, Mysore were able to develop silkworm breeds with fine denier namely, JPN7, CSR48, B63 and B65 of specific industrial requirement through directional selection. As the success of silkworm breeds mainly depends on their combining ability, the developed breeds were subjected for hybrid evaluation. Out of 42 bivoltine hybrids studied, one hybrid, CSR48×CSR5 was identified for its superiority over the existing bivoltine hybrids namely CSR2×CSR4, CSR2×CSR5 and CSR18×CSR19 for majority of qualitative traits. Post cocoon testing of large quantity of cocoons of CSR48×CSR5 resulted in the production of high quality 3A grade silk. It is for the first time in the Indian Sericulture industry that high quality silk with longer filament length of 1474m, denier of 2.47, standard size deviation of 0.983d, maximum size deviation of 1.322, neatness of 96p, reelability of, 85% tenacity of 3.87 g/d, elongation of 22.32% and cohesion of 110 strokes was produced. The superiority of fine denier silkworm breeds and their hybrids are discussed.

Development of Fine Denier Silkworm Hybrid $CSR48{\times}CSR5$ of Bombyx mori L. for Superior Quality Silk

Kalpana G. V.,Kumar N. Suresh,Basavaraja H. K.,Reddy N. Mal,Palit A. K. Korean Society of Sericultural Science 2005 International Journal of Industrial Entomology Vol.10 No.2

Serious attempt for the improvement of quality parameters in silkworm hybrids came rather very late in India. Realising the need for productive breeds to the field and reorientation in breeding methodology, the silkworm breeders of CSRTI, Mysore were able to develop silkworm breeds with fine denier namely, JPN7, CSR48, B63 and B65 of specific industrial requirement through directional selection. As the success of silkworm breeds mainly depends on their combining ability, the developed breeds were subjected for hybrid evaluation. Out of 42 bivoltine hybrids studied, one hybrid, $CSR48{\times}CSR5$ was identified for its superiority over the existing bivoltine hybrids namely $CSR2{\times}CSR4,\;CSR2{\times}CSR5\;and\;CSR18{\times}CSR19$ for majority of qualitative traits. Post cocoon testing of large quantity of cocoons of $CSR48{\times}CSR5$ resulted in the production of high quality '3A'grade silk. It is for the first time in the Indian Sericulture industry that high quality silk with longer filament length of 1474 m, denier of 2.47, standard size deviation of 0.983 d, maximum size deviation of 1.322, neatness of 96 p, reelability of $85\%$, tenacity of 3.87 g/d, elongation of $22.32\%$ and cohesion of 110 strokes was produced. The superiority of fine denier silkworm breeds and their hybrids are discussed.

Direct Single-stage Power Converter with Power Factor Improvement for Switched Mode Power Supply

Kalpana, R.,Singh, Bhim,Bhuvaneswari, G. The Korean Institute of Electrical Engineers 2010 Journal of Electrical Engineering & Technology Vol.5 No.3

This paper presents a direct single-stage power converter using single-phase isolated full-bridge converter modules, with inherent power factor correction (PFC) for a 12 kW switched mode power supply (SMPS). The advantages of the proposed converter are its simple control strategy, reduction in number of conversion stage, low input line current harmonics, and improvement in power factor. Analysis of the single-stage converter is carried out in continuous conduction mode of operation. Steady-state analysis of the proposed converter is conducted to obtain converter parameters. A systematic design procedure is also presented for a 12k W converter with a design example. The effect of load variation on SMPS is also studied in order to demonstrate the effectiveness of the proposed converter for the complete range of load conditions. A set of power quality indices on input ac mains for an SMPS fed from a single-stage converter is also presented for easy comparison of their performance.

Direct Single-stage Power Converter with Power Factor Improvement for Switched Mode Power Supply

R. Kalpana,Bhim Singh,G. Bhuvaneswari 대한전기학회 2010 Journal of Electrical Engineering & Technology Vol.5 No.3

This paper presents a direct single-stage power converter using single-phase isolated fullbridge converter modules, with inherent power factor correction (PFC) for a 12 kW switched mode power supply (SMPS). The advantages of the proposed converter are its simple control strategy, reduction in number of conversion stage, low input line current harmonics, and improvement in power factor. Analysis of the single-stage converter is carried out in continuous conduction mode of operation. Steady-state analysis of the proposed converter is conducted to obtain converter parameters. A systematic design procedure is also presented for a 12k W converter with a design example. The effect of load variation on SMPS is also studied in order to demonstrate the effectiveness of the proposed converter for the complete range of load conditions. A set of power quality indices on input ac mains for an SMPS fed from a single-stage converter is also presented for easy comparison of their performance.

Reduced graphene oxide/strontium titanate heterostructured nanocomposite as sunlight driven photocatalyst for degradation of organic dye pollutants

A. Rosy,G. Kalpana 한국물리학회 2018 Current Applied Physics Vol.18 No.9

Reduced graphene oxide/Strontium titanate (RGO/SrTiO3) heterostructured nanocomposite was synthesized by coupling Hummer's synthesized graphene oxide (GO) with hydrothermally synthesized SrTiO3 nanoparticles (SrTiO3) through a facile and unique high energy ultrasonication technique using triple solvents. XRD result confirmed the successful formation of pure, single phase and primitive cubic crystal structure RGO/SrTiO3 heterostructured nanocomposite. SEM result confirmed the successful intercalation of SrTiO3 nanoparticles over the two dimensional networks of RGO nanosheets. The synergistic and beneficial interactions between SrTiO3 and RGO resulted in smaller crystallite size (53 nm), reduced band gap (2.87 eV) and larger specific surface area (31m2/g) than that of as prepared pure SrTiO3 nanoparticles. RGO strongly influenced the photocatalytic activity of SrTiO3 and hence RGO/SrTiO3 heterostructured nanocomposite exhibited greater efficiency in degrading Rhodamine B (RhB) and Rose Bengal (RB) organic dye pollutants under natural sunlight irradiation than that of pure SrTiO3 nanoparticles.

DSC, Raman and Impedance Spectroscopy Studies on the xB₂O₃ − (90 − <i>x</i>)TeO₂ + 10TiO₂ (where <i>x</i> = 0 to 50 mol%) Glass System

Suresh Sripada,D. Esther Kalpana Rani,G. Upender,P. Gayathri Pavani 한국물리학회 2013 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.62 No.5

Titanium boro tellurite glasses in the xB₂O₃−(90−x) TeO₂ + 10TiO₂ (where x = 0 to 50 mol%) system were prepared by using the conventional melt-quenching technique. Glass transition temperatures were measured with differential scanning calorimetry (DSC) and found to be in the range of 300 - 370 ℃. The Raman spectra showed a cleavage of the continuous TeO₄ (tbp) network by breaking of the Te-O-Te linkages. The relative transition of TeO₄ − groups to TeO₃ − groups is accompanied by a change in the oxygen coordination of the boron from 3 to 4 (BO₃ ⁻ to BO₄ ⁻). The impedance plots Z▼(┺) versus Z▽(┺) for all the glass samples were recorded and found to exhibit a single circle. The AC conductivity of all glass samples was studied in the frequency range from 100 Hz to 1 MHz and in the temperature range from room temperature (RT) to 375 ℃. The AC conductivity decreased by about one order in magnitude with increasing B₂O₃ content. The conductivity was found to be on the order of 10^−4.5 to 10⁻⁶ (┯-cm)⁻¹ at 375 → and 1 MHz for 10 mol% and 50 mol% B²O³ contents, respectively. The relaxation behavior in these glass samples is discussed based on the complex modulus and impedance data.

Breeding of Productive Bivoltine Hybrid, CSR16 x CSR17 of Silkworm Bombyx mori L.

N. Mal Reddy,G.V. Kalpana,S. B. Dandin,R. K. Datta,H. K. Basavaraja,N. Suresh Kumar,P. G. Joge 한국잠사학회 2004 International Journal of Industrial Entomology Vol.8 No.2

The breeding work was initiated by utilizing two Japanese hybrids namely C135 ´ N134 and N137 ´ C146 along with two evolved Indian breeds, J14 and A24. The breed CSR16 which is characterized with marked larvae and white dumbbell cocoons was evolved from the Japanese hybrid C135 ´ N134 by crossing with J14, while the breed CSR17 which is characterized with plain larvae and white oval cocoons was evolved from the Japanese hybrid N137 ´ C146 by crossing with A24. The hybrid of these evolved breeds i.e., CSR16 ´ CSR17 has shown superior over control hybrid KA ´ NB4D2 and on par with the ruling hybrid of CSR2 ´ CSR4. The hybrid CSR16 ´ CSR17 was authorized during 1999 by Central Silk Board, Bangalore, Government of India for commercial exploitation during favourable months based on national level race authorization test.

A facile green synthesis of silver nanoparticles using Piper betle biomass and its catalytic activity toward sensitive and selective nitrite detection

K. Ramachandran,D. Kalpana,Y. Sathishkumar,이양수,K. Ravichandran,G. Gnana Kumar 한국공업화학회 2016 Journal of Industrial and Engineering Chemistry Vol.35 No.-

A facile, one-pot and environmental benign method exploiting Piper betle biomass as a reducing andstabilizing agent was proposed for the preparation of silver (Ag) nanoparticles. The Ag nanoparticlesprepared from dried Piper betle leaves extract exhibited unique spherical configuration and facecentered-cubic structure with preferred (1 1 1) orientation. The fabricated Ag/GCE sensor exhibited anexceptional electrocatalytic activity toward NO2 oxidation with a quick response time, high sensitivityand lower detection limit of 10 s, 1642.27 mAm M 1 cm 2 and 0.046 mM, respectively. Furthermore, theconstructed sensor exhibited long-term stability and excellent anti-interference properties, paving newdimensions for the utilization of bio-mediated nanocatalysts in electrochemical sensors.

Influence of vermiculite and sintered fly ash in robustness and hardened properties of light weight self-compacting concrete

A. Anitha,V.G. Kalpana,P. Muthupriya 한양대학교 청정에너지연구소 2023 Journal of Ceramic Processing Research Vol.24 No.1

The performance of Light Weight Self-Compacting Concrete (LWSCC) incorporated with Sintered Fly Ash and Vermiculiteare investigated in this study. The robustness and hardened properties of the LWSCC is investigated at diverse proportioningrates where Cement, Fine Aggregate and Coarse Aggregate are replaced with Fly Ash (FA) (25%), Vermiculite (1-9%) andSintered Fly Ash (SFA) (10-50%) respectively. The workability properties such as Filling ability, Passing ability, viscosity andthe mechanical properties such as density, compressive strength, tensile strength, flexural strength, ultrasonic pulse velocity,acid and sulphate resistance were studied. The percentage loss in weight and loss in compressive strength due to Acid attackand Sulphate attack at the age of 28 days of LWSCC were observed by immersing in 10% of HNO3, magnesium sulphate andsodium sulphate solutions. Vermiculite with SFA considerably boosted the workability and mechanical properties of LWSCCmixes. The presence of lightweight aggregates reduced the strength loss caused by sodium and magnesium sulphate ions. Acombination of 5% of Vermiculite and 30% of SFA resulted with the best robustness and hardened property of concrete

Biomediated Silver Nanoparticles for the Highly Selective Copper(II) Ion Sensor Applications

Kirubaharan, C. Joseph,Kalpana, D.,Lee, Yang Soo,Kim, A. R.,Yoo, Don Jin,Nahm, Kee Suk,Kumar, G. Gnana American Chemical Society 2012 INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH - Vol.51 No.21

<P>Nanoparticles synthesis is an evergreen research field of 21st century in which the connotation of the biomediated experimental process is highly imperative. Biomediated silver nanoparticles were synthesized with the aid of an eco-friendly biomaterial, namely, aqueous <I>Azadirachta indica</I> extract. The effect of pH and temperature on the formation of silver nanoparticles was analyzed. Formation of the silver nanoparticles was verified by surface plasmon spectra using a UV–vis spectrophotometer. Morphology and crystalline structure of the prepared silver nanoparticles were characterized by TEM and XRD techniques, respectively. Furthermore, the biomediated silver nanoparticles without any surface modification were used for the heavy metal ion sensors in aqueous media. The prepared silver nanoparticles were successful in detecting even the minimal amount of heavy metal copper(II) ion and exhibited excellent specific metal ion selectivity.</P><P><A href='http://pubs.acs.org/doi/suppl/10.1021/ie3003232'>ACS Electronic Supporting Info</A></P>