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Collaborative study of a mineral oil method for the extraction of light filth from ground paprika.
An official first action method for the extraction of light filth from spices, 44.A03--44.A05, was modified for the analyses of ground paprika. The sample is extracted with isopropanol and light filth is isolated from 40% isopropanol with mineral oil. Eight collaborators analyzed 4 paprika samples, 2 by the official method and 2 by the proposed method. Average recoveries of added elytral squares were 97 and 66%, respectively, for the proposed and official methods. Recoveries of added rodent hairs were 94 and 61%, respectively. The method has been adopted as official first action for the extraction of light filth from ground paprika.
Collaborative study of a modified method for the extraction of light filth from ground white pepper, cardamon, celery seed, coriander, and ginger.
An improved method has been developed for the extraction of light filth from 5 ground spices, ginger, white pepper, coriander, celery seed, and cardamom. The method, a modification of 44.120, utilizes a cold isopropanol defatting, followed by wet sieving and flotation of light filth from 40% isopropanol with HCl and mineral oil-heptane (85 + 15). Collaborative results show that the proposed method is more rapid to perform than the present official first action methods, 44.116 and 44.120, and yields better recoveries. The method has been adopted as official first action.
[Testing of the olfactory and taste functions in workers of the "Vitamin" paprika-processing plant for pepper in Horgos].
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Extraction of light filth from oriental sauces containing soy sauce, thickeners, and spices: collaborative study.
Results are reported for a collaborative study of a method for the extraction of light filth from oriental sauces containing soy sauce, thickeners, and spices. A 100 g test portion is pretreated in a 2% solution of Tergitol Anionic 4 over a steam bath, and oils are removed by wet-sieving on No. 230 sieve. Filth is isolated from 40% isopropanol by using Na4EDTA and mineral oil. Average recoveries by 9 collaborators for 3 spike levels of rat hairs (5, 10, and 15) were 84, 78, and 79%, respectively; for insect fragments (5, 15, and 30), recoveries were 92, 95, and 96%, respectively. The method was adopted first action by AOAC International.
Fate of Yersinia enterocolitica in commercial acidified/emulsified foods.
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Collaborative study of a method for the extraction of light filth from ground mace and ground caraway seed.
A new method has been developed for the extraction of light filth from ground mace and ground caraway seed. The method uses a 2-step chloroform-isopropanol pretreatment followed by separation of the light filth from 40% isopropanol with mineral oil. The collaborative study resulted in clean filter papers with more reproducible recoveries of light filth elements than the official first action method, 44.116 (b). The method has been adopted as official first action.
Letter: Nutmeg and prostaglandins.
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What to expect from expectorants.
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Sensory effects of capsaicin congeners. Part II: Importance of chemical structure and pungency in desensitizing activity of capsaicin-type compounds.
The characteristic insensitivity of sensory nerve endings to chemically induced pain brought about by capsaicin could be reproduced on the rat's eye by pungent vanillylamides, homovanilloyl-alkylamides and piperine, while homovanilloyl-cycloalkylamides, -azacycloalkylamides, - alkylesters, -alkyl-homovanillylamides, undecenoyl-3-aminopropranololand zingerone were practically ineffective in this respect. Desensitizing potency was not parallel with the stimulating effect of the compounds, e.g. the strongly pungent homovanilloyl-octylester failed to desensitize the receptors, while the less pungent homovanilloyl-dodecylamide proved to be a more potent desensitizing agent than capsaicin itself. It is concluded that the inverse position of the acylamide linkage does not modify, while its replacement by an esteric group completely abolishes the desensitizing activity. In contrast to the stimulating effect, in desensitizing action the presence of an alkyl chain is essential and its optimal length corresponds to 10-12 C atoms. On the basis of these results the possible molecular interactions at the site of action are discussed.
Spectrophotometric determination of certain volatile oils. Part 1: Assay for phenols in volatile oils of clove and thyme.
A differential spectrophotometric method was described for the assay of thyme and clove oils. The method is based on the relative absorbance measurement of the thymate or eugenate anions to the respective molecular thymol or eugenol in alcoholic medium. The results of the differential method, compared with those of the conventional method, are more accurate.
Subchronic oral hepatotoxicity of turmeric in mice--histopathological and ultrastructural studies.
Dietary administration of the whole spice turmeric (0.2%, 1.0%, 5.0%) or ethanolic turmeric extract (ETE, 0.05%, 0.25%) for 14 days, at doses reported to be cancer preventive in model systems, were found to be hepatotoxic in mice. Histopathological evaluation showed coagulative necrosis accompanied by a zone of regenerating parenchymal cells of liver. The ultrastructural changes in liver parenchymal cells were non-specific reaction to injury. Results suggest mouse to be a susceptible species for turmeric induced toxicity.
Salmonella enteritidis infections from shell eggs: outbreaks in California.
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