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Ultrastructural Changes In the Midgut During Metamorphosis inApis Cerana Indica.
Kalpana M. Kelwadkar,Deepak D. Barsagade 한국잠사학회 2008 International Journal of Industrial Entomology Vol.16 No.1
The midgut epithelium of Indian honey bee Apis cerana indica is consist of digestive cells and small regenerative cells. The regenerative cells are placed in the nests scattered among the digestive cells. During metamorphosis the midgut of Apis cerana indica is remodeled. The larval midgut epithelium and muscular sheath digested partially at the end of larval period and thrown out in the form of debris in the lumen. The new epithelium is formed by the proliferation of the regenerative cells and during pupation reorganization of midgut layer occurs. The ultrastuctural studies shows that the regenerative cells are in contact with degenerative cells by the cytoplasmic extension which have many septed and gap junctions in the fifth instar larvae. In developing pupae reorganization of the midgut epithelium is continued whereas in the pharate adult the midgut wall shows, characteristic of adult midgut epithelium with pycnotic nuclei in some cells.
Kalpana K. Landge,Beata Bialek,Jae Il Lee(이재일) 한국자기학회 2009 韓國磁氣學會誌 Vol.19 No.3
We examine the effect of U term (U = 3 eV) describing the Coulomb interactions between electrons on the results of electronic band structure calculations carried out for bcc Fe bulk, monolayer, and chain. We investigated the properties of the three Fe structures by using the all-electron total-energy full-potential linearized augmented plane wave method. The U term was included in the exchange - correlation functionals constructed on the basis of local density approximation (LDA) and general gradient approximation (GGA). We found that in the case of bcc Fe bulk structure inclusion of the U term leads to the overestimated values of magnetic moment on Fe atom. The values of magnetic moment calculated for Fe in monolayer and chain are in accordance with calculations in which the U term was not included. In general, for each system the calculated values of magnetic moment on Fe sites were larger when the U term was incorporated in the energy functional. In Fe bulk, the value of magnetic moment 2.54 μ<SUB>B</SUB> for LDA+U larger than 2.25 μ<SUB>B</SUB> for LDA.
Magnetic Properties and Relaxation of Vanadium Monolayer on Pd(001) Surface
Kalpana K. Landge,Beata Bialek,Jae Il Lee 한국자기학회 2010 Journal of Magnetics Vol.15 No.2
We investigated the magnetism of vanadium monolayers on a Pd(001) surface. The electronic structure and the magnetic properties of the V/Pd(001) system were determined with the use of the full-potential linearized augmented plane-wave method within the general gradient approximation. Three magnetic configurations were studied: non-, ferro-, and antiferromagnetic. From the total energy calculations, we found that the V/Pd(001) system is the most stable in the antiferromagnetic configuration. The importance of relaxation on the magnetic properties of the systems was also studied. It was found that the Pd(001) surface covered with a V monolayer undergoes considerable relaxation in which the spacing between Pd layers increases in all three magnetic configurations. Contrary to the Pd interlayer spacing, the distance between the V overlayer and the topmost Pd layer is reduced. The interlayer spacing between the V overlayer and the Pd surface layer is the largest for the antiferromagnetic configuration. In the relaxed antiferromagnetic structure, the magnitude of the calculated magnetic moments on the V atoms was 1.31 μB. The presence of the vanadium monolayer does not affect the paramagnetic properties of the Pd(001) surface.
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.
Kalpana, Duraisamy,Cha, Hyo-Jung,Choi, Tae-Ki,Lee, Yang-Soo The Plant Resources Society of Korea 2011 한국자원식물학회지 Vol.24 No.6
Mulberries have importance in the sericulture industry as food for Bombyx mori, silkworm reared for its silk. Korean Morus alba have many cultivars and, for the protection of these cultivars and for utilization in plant-breeding programs, genetic information and the diversity among cultivars are essential. This study with 14 mulberry genotypes was undertaken using RAPD and ISSR fingerprinting to discover the genetic divergences between cultivars. Polymorphism rate among the cultivars produced by RAPD primer was found to be 64.48% and 66.29% relative to ISSR primer. The genetic relationships among the cultivars were identified using a dendrogram constructed with the UPGMA clustering method. Nei's method was used to calculate the genetic dissimilarity coefficients between each pair of genotypes, and the highest dissimilarity coefficient of 0.246 was exhibited between Suwon and Hwanggum cultivars. To determine the efficiency of each primer, a polymorphic index was calculated, and the robustness of the dendrogram was checked using cophenetic correlation coefficient. The results of this study can be utilized for the improvement of mulberry varieties in plant-breeding programs.