Aus der Arbeit der EPPO/OEPP (XI)     

RD i. R. Dr. Edmund Leib 《Journal of pest science》1979,52(6):95-96

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Rundschau     

Leib RD i. R. Dr Edmund 《Journal of pest science》1989,62(3):59-61

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Rundschau     

RD i. R. Dr. E. Leib 《Journal of pest science》1984,57(2):35-38

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Rundschau     

RD i. R. Dr. Edmund Leib 《Journal of pest science》1984,57(4):74-77

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Rundschau     

RD i. R. Dr. Edmund Leib 《Journal of pest science》1982,55(9):140-142

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Rundschau     

Edmund Leib  RD i. R. Dr. Edmund Leib 《Journal of pest science》1980,53(7):107-109

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Rundschau     

RD i. R. Dr. Edmund Leib 《Journal of pest science》1988,61(7):138-140

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Speciation of antifoulant organotin compounds in water     

Van Van Nguyen  Isadora J. Posey  George Eng 《Water, air, and soil pollution》1984,23(4):417-422

The fate of several antifoulant organotin compounds, Ph₃SnOH, Ph₃SnCl, and Ph₃SnOOOCH₃ in water has been investigated using IR spectroscopy and thin-layer chromatography. Except for the residue resulting from the extract of aqueous Ph₃SnOOOCH₃ the IR spectrum of each residue was identical to that of the starting organotin compound. The IR spectrum of the residue obtained from the chloroform extract of aqueous Ph₃Sn000CH₃ which had been shaken for 7 days showed the presence of Ph₃SnOH, as confirmed by the presence of a small doublet around 910 and 897 cm^?1. Also, the pH measurement of each of the aqueous Ph₃SnX solutions decreased with time. These results are interpreted to suggest that the organotin compounds studied ionize in aqueous media. Thin-layer chromatography results give further support to these findings. The study suggests that the X group in the compounds of the type Ph₃SnX is labile in polar solvents and that Ph₃SnOH, and/or Ph₃SnX are the species formed in aqueous solution.  相似文献   

Rundschau     

RD i. R. Dr. Edmund Leib 《Journal of pest science》1983,56(8):154-158

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Different Doses of Porcine Luteinizing Hormone in Precocious Puberty Induction in Gilts     

RD Gama  WL Vianna  ME Pinese  A de  Campos Rosseto  A de  Sant''Anna Moretti 《Reproduction in domestic animals》2005,40(5):433-435

The use of hormonal protocols in puberty induction and synchronization of oestrus has lead to an increase in the efficiency of replacement gilts. The aim of this study was to evaluate different doses of porcine LH in precocious puberty induction and oestrus synchronization in a homogeneous group of gilts. Sixty-seven homogeneous prepubertal gilts (Camborough 22) at 137 +/- 4 days of age and 87 +/- 7 kg were treated with three different hormonal protocols: T1--600 UI of equine chorionic gonadotrophin (eCG; Novormon) and after a 72-h period 5 mg of LH (Lutropin); T2--600 UI of eCG and a 72-h period 2.5 mg of LH; T3--600 UI of eCG and a 72-h period 1.25 mg of LH. The ovaries were examined at slaughter, on day 6 after the hormonal treatment. There were no statistical differences (p > 0.05) between the different LH doses in the percentage of the detected oestrus (T1 = 42.85%; T2 = 60.87%, T3 = 52.18%), oestrus duration (T1 = 41.44 +/- 16.30 h; T2 = 48.57 +/- 16.29 h, T3 = 39.33 +/- 11.42 h), number of corpora lutea (T1 = 9.61 +/- 5.43; T2 = 9.86 +/- 3.32, T3 = 8.13 +/- 5.52) and percentage of animals presenting ovarian cystic degeneration (T1 = 33.33%; T2 = 39.13%, T3 = 39.13%). The T2 (2.5 mg of LH) presented the lowest dispersion (p < 0.05) of the LH-ovulation interval (T1 = 37.17 +/- 4.07 h; T2 = 38.26 +/- 2.84 h; T3 = 36.25 +/- 5.69 h). The LH dose reduction to 2.50 and 1.25 mg presented equal results with the recommended dose of 5.0 mg, and could be used in the precocious induction of oestrus in gilts. The 2.5-mg LH dose showed the lowest dispersion of ovulation and it can be used in fixed-time artificial insemination programmes.  相似文献