Now showing items 1-12 of 12
| URI: | http://dyuthi.cusat.ac.in/purl/741 |
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| Padma Nambisan, ... intervention..,Nov2007.PDF | (1.918Mb) |
| Abstract: | The changes occuring to cashew kernels during storage at two humidity levels - 80% to 20% with respect to organoleptic characteristics, protein content, carbohydrate content, oil content, iodine and peroxide values were studied. From the present study it is concluded that organoleptic characteristics of cashew kernels deteriorates with increase in humidity. Decrease in protein and carbohydrate content of stored cashew kernel is dependent on humidity. Humidity increased oxidative rancidification. |
| URI: | http://dyuthi.cusat.ac.in/purl/732 |
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| Jisha K G and o ... in protein..,Aug.1997.PDF | (2.827Mb) |
| Abstract: | Response of callus culture and seedlings of a salt tolerant rice variety, pokkali, was compared to that of a salt sensitive variety, hrswa, under conditions of salinity stress induced by incorporating different quantities of sea water in the culture media. Seedlings of pokkali showed minimal symptoms of salt stress under conditions of low salinity and more severe symptoms including dry of older leaves under high salinity Conditions. However, seedlings of hrswa showed severe stress symptoms even under low salinity and plant death under high salinity conditions. This superior character of salt tolerance of pokkali over hrswa was, however, not observed in callus cultures. In both the cultivars, the severity of symptoms depended on the intensity of stress. Accumulation of free proline in callus cultures and seedlings under stress conditions was monitored. Both pokkali and hrswa accumulated proline in response to stress to the same level. The response was same in callus cultures and in seedlings of both cultivars and the rate of proline accumulation was dependent on the intensity of stress. This, study, thus, indicates that accumulation of proline is not indicative of salt tolerance character in rice. |
| URI: | http://dyuthi.cusat.ac.in/purl/745 |
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| Sabu, A and others,comparison of...,Feb 1995.PDF | (2.380Mb) |
| Abstract: | Plants were regenerated from callus induced from leaf disc explants of a tomato F, hybrid heterozygous for three marker loci (a), without anthocyanin (aw), and hairless (hl). Regenerants were studied for somaclonal variation at the phenotypic level by scoring for variation in the marker loci, and at the DNA level by probing geomic DNA blots with a chlorophyll a/b binding protein (Cab-3C) cDNA sequence. While no variation was observed at the phenotypic level in over 950 somaclones studied, DNA polymorphism for the Cab locus could be detected in two out of 17 somaclones tested. Tissue culture induced variation at the phenotypic level for specific loci is very low (less than 0.001 for a, awor hl) but DNA sequence changes are induced at much greater frequency (- 0.1 for a multicopy gene family such as Cab). |
| URI: | http://dyuthi.cusat.ac.in/purl/733 |
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| Padma nambisan ... polymorphism..,mar1992.PDF | (2.623Mb) |
| Abstract: | Cashew kernels have high nutritive value. Upon exposure to air kernels turn rancid and their nutritive value decreases. From this study it is concluded that chemical treatment using antioxidants reduced oxidative rancidity but failed to prevent deterioration in organoleptic characteristics and decrease in protein and carbohydrate content of stored kernels. |
| URI: | http://dyuthi.cusat.ac.in/purl/743 |
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| Rekha Ravindran and others,.PDF | (2.997Mb) |
| Abstract: | A comparative study of the effect of laser in inducing chromosomal aberrations at 488 nm was done in Vicia faba L. (faba bean) and Allium cepa L. (onion) with Argon ion laser (Spectra Physics Model 171). Seeds and bulbs of V. faba and A. cepa were subjected to laser irradiation by 488 nm excitations from Argon ion laser source at power levels 200 and 400 mW with power densities 2.25 mW cm-2 and 4.49 mW cm-2 and different exposure times ( 10, 20, 30 & 40 ..... tc) similar to the effect of other physical and chemical mutagens, laser caused a dose dependent decrease in mitotic index and a rise in mitotic aberrations when compared to the control . In both plant species, mutations were observed in all stages of mitotic cell cycle . The total percentage of aberrations was two fold higher at 400 mW than at 200 mW exposure. |
| URI: | http://dyuthi.cusat.ac.in/purl/747 |
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| Unnikrishna Pil ... on..Allium cepa L,1997.PDF | (3.611Mb) |
| Abstract: | Laser irradiation at wavelength 514 nm was used to study the effect, of lasers in inducing chromosomal aberrations at mitosis. This study offers a new radiation system which could be used for the induction of mutations. Results are compared with those obtained from studies using y-rays as irradiation source. |
| URI: | http://dyuthi.cusat.ac.in/purl/746 |
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| Unnikrishna Pil ... tion of Mitotic..,1997.PDF | (5.171Mb) |
| Abstract: | The use of laser excitations at two wavelengths, 488 rim and 514 nm, produced by Argon ion laser in two plants species, Vicia faba (faba bean) and Allium cepa L., is described to compare the mutagenicity and the spectrum of chromosomal aberrations induced by laser at mitosis. The laser irradiation has been done at two power levels 200 and 400 mW with power densities 2.25 mW cm 2 and 4.49 mW cm 2 and different exposure times (10, 20, 30 and 40 min). The effect produced by laser is compared to those of UV rays and y- radiations. Laser as in the case of other physical and chenucal mutagens causes a dose-dependent decrease in mitotic chromosomal aberrations at these wavelengths. It is postulated that laser could be used as a new radiation system for the induction of mutations. |
| URI: | http://dyuthi.cusat.ac.in/purl/748 |
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| Unnikrishna Pil ... rs as mutagens,may1998.PDF | (3.837Mb) |
| Abstract: | The morphological and biochemical response of calli and seedlings of different rice cultivars were compared under acid saline conditions. Calli of both tolerant and sensitive varieties showed severe stress symptoms like browning and necrosis, but the onset of stress symptoms was delayed in Pokkali. Seedlings of Pokkali showed minimal stress symptoms in lower salinities, and curling and senescence of older leaves in higher salinities although plants revived on amelioration of stress. Seedlings of the other varieties showed severe stress symptoms even at low salinities and plant death at higher salinities. Salt stress induced accumulation of the putative osmoprotectant proline in calli and seedlings of all varieties. Proline accumulation was higher in sensitive varieties than in Pokkali. These results indicate that proline accumulation is not directly correlated with salt tolerance in rice. |
| URI: | http://dyuthi.cusat.ac.in/purl/744 |
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| Renuka Devi,P S ... ,Prline accumulation...PDF | (1.866Mb) |
| URI: | http://dyuthi.cusat.ac.in/purl/742 |
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| Padma Nambisan,Seaweed biotechnology,1999.PDF | (5.195Mb) |
| Abstract: | Somatic embryos were induced from scutellar callus of immature zygotic embryos of T aestivum cv. Chinese Spring. Observations on precociously germinating somatic embryos revealed that: (i) In the initial stages the coleoptile is split, exposes the shoot apex and forms a green trichomatous leafy structure. In the germinating zygotic embryo, the coleoptile is tubular, (ii) Unlike what has been inferred earlier the leafy structure is the coleoptile and not the scutellum, (iii) Bipolarity of the embryoid is established later when root develops at the basal end. |
| URI: | http://dyuthi.cusat.ac.in/purl/740 |
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| Padma Nambisan ... bryogenesis...,Jan1992.PDF | (2.812Mb) |
| URI: | http://dyuthi.cusat.ac.in/purl/739 |
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| Padma Nambisan ... ,woman in science,2008.PDF | (1.968Mb) |
Now showing items 1-12 of 12
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