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on fractionated extracts of abalone meat, Konosu and Hashimoto (1964) demonstrated a similar key interrelationship to a meaty character between glutamic acid and adenosine '-monophosphate. Komato (1964) obtained similar results with "Uni", the unripe gonad of the sea urchin. Of the amino acid fraction in combination with mononucleotides, he found glycine, valine, alanine, glutamic acid, and, particularly, methionine to be important. The elimination of glycine resulted in an increase in bitterness and a decrease in sweetness.Such findings tend to confirm the suggestions that amino acids are likely to be important nonodoriferous contributors to the overall flavor of fish sauce.Experimental evidence obtained by chemical and sensory analyses has shown that mixtures of NaCl and KC1

Summary. The persistence of trifluralin was investigated at 3 sites in southern Australia over 8 years. Persistence varied from year-to-year, with the highest persistence being recorded at all sites in the dry year of 1984. Trifluralin persistence (expressed as a percentage of the initial measured concentration) 1 year after application was lowest at Rutherglen (7–22%), followed by Dooen (7–26%) and Walpeup (13–120%). Trifluralin degradation at Walpeup in 1984 was negligible. The resultant high residue concentrations would have posed a threat to subsequent crops. However, 1 year later after the subsequent fallow, the residue concentration had dropped to more typical levels. Trifluralin did not accumulate after repeated application (either 1 or 2 years apart) at all 3 sites. It was found important to measure the amount of trifluralin in the soil immediately after application because the trifluralin concentration could not be assumed from the rate. Soil concentrations immediately after application ranged from 32 to 138% of that expected from the nominal application rate. Therefore, measuring initial concentrations when comparisons were to be made between treatments, years and sites, was essential. In addition to studies of 1 year persistence, trifluralin concentration was also measured 2 years after application at Walpeup and Dooen. There was evidence to suggest that the rate of degradation over the same 1 year period, was different for a recent application when compared with weathered trifluralin residues from a previous application. Correlations between persistence and various weather factors indicated that the most influential factors were those that occurred in the first 60 days after application. These included total rainfall, effective rainfall (rainfall minus evaporation) and average maximum temperature.

A method is described for the analysis of soils for residues of the herbicide diclofop‐methyl, methyl (RS)‐2‐[4‐(2,4‐dichlorophenoxy)phenoxy]propionate, and its breakdown product diclofop, (RS)‐2‐[4‐(2,4‐dichlorophenoxy)phenoxy]propionic acid. Diclofop‐methyl undergoes hydrolysis in the soil to diclofop, which also has herbicidal activity. A procedure, using a 1% phosphoric acid solution for extraction purposes, has been developed and gives good recoveries of both diclofop‐methyl and diclofop at the 0.5 and 0.05 mg kg−1 levels. After methylation, gas‐liquid chromatography with electron‐capture detection is used to determine total residue concentrations.

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