四指套
发表于 2025-3-23 10:15:40
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符合国情
发表于 2025-3-23 17:03:26
Movement of DDT and its derivatives into the atmosphere,xample, . (1964) reported that all but two of 18 samples of ambient air collected over four California cities in 1963 contained measurable amounts of DDT; in air sampled at nine localities in the United States, from both rural and urban communities, only DDT was found at all localities (... 1971) .
沙文主义
发表于 2025-3-23 21:54:12
The evaluation of the safety of 2,4,5-T to birds in areas treated for vegetation control,pyl, butyl, isooctyl, butoxy ethanol (= butoxyethyl), and propyleneglycol butyl ether (PGBE) derivatives of 2,4,5-T. Some commonly used salts have been the dimethylamine, triethylamine, and the oleic-1,3-propylenediamine derivatives of 2,4,5-T.
AXIOM
发表于 2025-3-24 01:59:53
Chemical derivatization of herbicide residues for gas liquid chromatographic analysis,mpact on crop production as well as on management of non-agricultural land. They are being used in increased quantity and new compounds are being added to the list of herbicides every year. Thus, there exists an increasing demand for analytical methodology of herbicide residues.
mediocrity
发表于 2025-3-24 03:23:04
, fluorescence spectroscopy of pesticides and other organic pollutants,colorimetric methods. Nevertheless, its application to organic residue analysis has been somewhat limited due to the fact that not too many pollutants are very fluorescent and that many naturally occurring compounds interfere. Thin-layer chromatography (TLC), on the other hand, is well established a
我要威胁
发表于 2025-3-24 06:46:39
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不能仁慈
发表于 2025-3-24 12:38:32
Effects of DDT on reproduction in higher animals,used of inhibiting photosynthesis in lower plants. Occasionally its toxicity in the environment has been observed in the form of reproductive failure, direct and indirect, and almost exclusively in birds and fish.
保守
发表于 2025-3-24 17:07:13
e most metamathematical investigations are focused on carrying out mathematical reductions, we claim that in order to give a full substitute for Hilbert’s program, one should not stop with purely mathematical investigations, but give an answer to the question why one should believe that all theorems
miniature
发表于 2025-3-24 19:31:43
Eugene E. Kenagae most metamathematical investigations are focused on carrying out mathematical reductions, we claim that in order to give a full substitute for Hilbert’s program, one should not stop with purely mathematical investigations, but give an answer to the question why one should believe that all theorems
芳香一点
发表于 2025-3-25 00:33:52
S. U. Khanown as Goodstein sequences. This chapter revisits Goodstein’s 1944 paper. In light of new historical details found in a correspondence between Bernays and Goodstein, we address the question of how close Goodstein came to proving an independence result for .. We also present an elementary proof of th