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Abstract  

Neutron activation analysis (NAA) technique has been used for the estimation of Mn, Na, and K in different varieties of oil seeds of mustard and sunflower in India. The samples were irradiated in a252Cf source with neutron flux of 109 n s–1 and the analysis was done using a multichannel analyzer (MCA) coupled to high purity germanium (HPGe) detector. Different varieties of seeds are found to have different concentrations of tracer elements when compared among themselves.

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leaves of two sunflower hybrids: photosynthesis, electron transporz and carbon metabolism Jurnal of experimental botany 50(330): 127–138 JAN 1999 Plesnicar M. Acclimation to long

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Babu, N.K.-Vyakaranahal, B.S.-Shashidhara, S.D.-Giriraj, K. (1993): Effect of plant densities on seed quality in parental lines of BSH-I hybrid and cv. Morden of sunflower. Karnataka Journal of Agricultural

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Increasing NaCl levels retarded the net photosynthetic rate, biosynthesis of photosynthetic pigments and membrane integrity of maize and sunflower seedlings; a serious effect was exhibited when NaCl was applied at high concentration. On the other hand, the K + efflux increased at increasing NaCl levels. In addition, the various salt levels induced considerable variations in the concentrations of sodium, potassium, calcium and magnesium. The vitamins applied were generally effective in partially or completely countering the inhibitory effects of salt stress on net photosynthetic rate, pigments biosynthesis and membrane integrity, exerting a stimulatory action on these parameters, especially in plants subjected to moderate and low salinity levels. The leakage of K + was reduced by the application of both ascorbic acid (AsA) and thiamine (B 1 ). Soaking the seeds of salt-stressed plants in AsA or B 1 had a favourable effect on the accumulation of certain ions and antagonized or ameliorated the inhibitory effect of salt stress.

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Beard, B. H. — Geng, S. (1982): Interrelationship of morphological and economic characters of sunflower. Crop Sciences 22. 4. 817–822. Geng S

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235 Hall, A. J., Connora, D. J., Whitfield, D. M. 1989. Contribution of pre-anthesis assimilates to grain-filling in irrigated and water-stressed sunflower crops I. Estimates using labelled

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Kovačević V. — Banaj Dj. — Kovačević J. — Lalić A. — Jurković Z. — Krizmanić M.: 2006. Influences of liming on maize, sunflower and barley — Cereal Research Communications vol. 34. no. 1 553–556 pp. Krizmanić M

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. Pepó, P.: Borbélyné Hunyadi, É.: Zsombik, L. 2002. A napraforgó-termesztés biológiai alapjai. Gyakorlati Agrofórum. 13.1. 15.–19.p. http://www.fao.org/ag/agl/aglw/cropwater/sunflower.stm Zsombik L

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gyomirtás és termésszabályozás 2001 Torma M., Hódi L., Horn A. (2004): Study of fluminoxazin in sunflower, onion and garlic. 4th

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Carotenoids are important pigments found in foods and biological samples. Among carotenoids, β-carotene is the major carotenoid present in vegetable oils. It plays an important role in the thermal stability of the vegetable oil. We established a simple, precise, specific, sensitive, repeatable, and accurate HPTLC method for the analysis of β-carotene in fortified vegetable oils and assessment of its degradation. Analysis was performed on silica gel HPTLC plates with petroleum ether-hexane-acetone 2:3:1 ( v/v ) as mobile phase and densitometric detection. The R F of β-carotene was 0.91 and regression analysis showed response was a linear function quantification of amount of β-carotene in the range 100–600 ng ( r 2 = 0.99991). The limits of detection and quantification were 0.11 and 0.37 ng, respectively. The thermal degradation (1–5 h at 100°C) of β-carotene in fortified sunflower oil was studied. It was observed that this HPTLC method could be used for efficient analysis and monitoring of the degradation of β-carotene in edible oils.

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