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  • 1
    ISSN: 1432-2242
    Keywords: Zea mays ; Correlations of various characteristics ; Regressions
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary 1. The different reactions of inbred strains and hybrids often influence yield performance under different ecological conditions. Because of the negative correlation between length of vegetation period and yield of the hybrids (r=−0.473) it was possible in some cases to obtain higher yields in a shorter vegetation period up to tasseling and silking. In kernel yield, the relationship between inbred strains and their hybrids was small. Here, specific combining ability is much more important, and length of vegetation period did not show any apparent direct influence. Only in cases of a combination of both high-yielding performance and appropriate day length and temperature could high yields be obtained under corresponding climatic conditions. 2. Dry matter content in kernels at harvest time was distinctly influenced by length of vegetation period (r=0.639 for inbred strains and r=0.767 for hybrids). Correlation between strains and hybrids in dry matter content of kernels was not very close (r=0.335). 3. Grain yield was much more influenced by the number of kernels per plant in inbred strains (r=0.572) than in hybrids (r=0.338), but there was no dependence of the number of kernels per plant on length of vegetation period. The number of kernels was much more influenced by the number of rows per ear (r=0.761 for inbred strains and 0.531 for hybrids), by diameter of ear (r= 0.672 and r=0.414) and by length of ear (r=0.684 and 0.657) respectively. For these characteristics the correlation between inbred strains and hybrids was distinct for length of ear (r=0.537) and number of kernels per plant (r=0.384) only. Some strains, however, did show a closer correlation in these characteristics. 4. Yield is influenced quite clearly by TKW as well (r=0.546 for inbred strains and 0.703 hybrids). There was no relationship between the other tested characters and TKW. The inheritance of these characters between inbred strains and hybrids was quite clear, especially for Cr Mi (r=0.808). 5. Cob percentage (in % d.m. of the whole ear) was only weakly inherited by some of the lines, for example, F 2. Between kernel yield and cob percentage, a negative correlation with r=−0.542 for the inbred strains and r=−0.307 for the hybrids could be found.
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  • 2
    ISSN: 1432-0614
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: Abstract The time course of 3-acetyldeoxynivalenol (AcDON) formation was analysed over a 11 day culture period ofFusarium graminearum (DSMO 4258) on rice. The maximum of 2840 mg/kg AcDON was detected after 9 days of culture. To overcome the complicated clean up of the solid substrate extract, 10% methanol in water was applied as extract solvent. After liquid-liquid partition with ethyl acetate, more than 75% of the toxin could be detected. After one simple clean up step (column chromatography over florisil) AcDON could be crystallised. After ion exchange chromatography deoxynivalenol (DON) could be crystallised and an overall yield of 1,44 g DON per kg of culture was obtained.
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  • 3
    ISSN: 1432-0614
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: Abstract The time course of 3-acetyldeoxynivalenol (AcDON) formation was analysed over a 11 day culture period ofFusarium graminearum (DSMO 4258) on rice. The maximum of 2840 mg/kg AcDON was detected after 9 days of culture. To overcome the complicated clean up of the solid substrate extract, 10% methanol in water was applied as extract solvent. After liquid-liquid partition with ethyl acetate, more than 75% of the toxin could be detected. After one simple clean up step (column chromatography over florisil) AcDON could be crystallised. After ion exchange chromatography deoxynivalenol (DON) could be crystallised and an overall yield of 1,44 g DON per kg of culture was obtained.
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  • 4
    ISSN: 1432-0614
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: Abstract The time course of 3-acetyldeoxynivalenol (AcDON) formation was analysed over a 11 day culture period of Fusarium graminearum (DSMO 4258) on rice. The maximum of 2840 mg/kg AcDON was detected after 9 days of culture. To overcome the complicated clean up of the solid substrate extract, 10% methanol in water was applied as extract solvent. After liquid-liquid partition with ethyl acetate, more than 75% of the toxin could be detected. After one simple clean up step (column chromatography over florisil) AcDON could be crystallised. After ion exchange chromatography deoxynivalenol (DON) could be crystallised and an overall yield of 1,44 g DON per kg of culture was obtained.
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  • 5
    ISSN: 1398-9995
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: Background:  It remains controversial whether fatty acid (FA) composition of breast milk relates to development of atopy in the infant. This study evaluates FA in colostrum from mothers of children at high risk of atopy in association with atopy at the age of 1 year.Methods:  The FA of colostrum were analyzed for 218 children (60 with low birth weight between 1500 and 2500 g, 84 with a history of maternal atopy, and 74 with an elevated cord blood immunoglobulin (Ig)E of 〉0.9 IU/ml). Total lipids were extracted, methylated and separated by gas–liquid chromatography. Laboratory screening for allergic sensitization and clinical examination took place within the Leipzig Allergy Risk Children's Study (LARS).Results:  Low birth weight was correlated with low percentage levels of 20:2n-6, 22:2n-6, and 22:3n-3 (r = 0.14, P 〈 0.05; r = 0.14, P 〈 0.05 and r = 0.20, P 〈 0.01, respectively) and low gestational age at birth was correlated with low 22:3n-3 (r = 0.15, P 〈 0.05). There was no association between FA and atopic eczema at the age of 1 year. However, high linoleic acid (LA, 18:2n-6) was linked to high specific IgE against cow's milk protein (P 〈 0.05), and low docosapentaenoic acid (DPA, 22:5n-3) was associated with elevated total serum IgE (P 〈 0.05) at the age of 1 year, respectively.Conclusions:  The polyunsaturated fatty acid composition of colostrum in a high risk newborn population shows associations with atopic sensitization at the age of 1 year and may be predictive for later atopic disease.
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