1 0 0 0 OA 辛味の科学 (I)

著者
福井 富次郎
出版者
社団法人 大阪生活衛生協会
雑誌
生活衛生 (ISSN:05824176)
巻号頁・発行日
vol.8, no.5, pp.163-170, 1964 (Released:2010-10-28)
参考文献数
57
著者
中間 昭彦 山田 浩一
出版者
(社)大阪生活衛生協会
雑誌
生活衛生 (ISSN:05824176)
巻号頁・発行日
vol.41, no.5, pp.183-188, 1997-09-30 (Released:2010-03-11)
参考文献数
9

We determined the amount of ascorbic acid (AsA) in 31 commercial non-alcoholic beverages sold in Osaka City, Japan. AsA was analyzed by high performance liquid chromatography (HPLC) using a LiCrosorb 100 NH2 column and 3mM ammonium phosphate/acetonitrile (30:70) as mobile phase. Concentrated-restored fruit juices contained 210-470μg/ml AsA, more than natural fruit juices (110-140μg/ml). The content of AsA in tea drinks was similar to that in concentrated-restored fruit juices at 290-360μg/ml. Furthermore, beverages prepared from natural materials such as orange juices or green tea showed differing AsA content between different product lots.To estimate the difference between AsA analytical methods, we used 5 AsA analytical methods, HPLC, the indophenol titrimetric method, the dinitrophenylhydrazine method, the fluorometric method, and the enzymic method. In green tea, the enzymic method showed the minimum reading, which was 80% of that found using the indophenol titrimetric method, which showed the maximum. The AsA content of concentrated-restored fruit juices varied widely according to method. The dinitrophenylhydrazine and enzymic methods showed significant difference from other methods; in particular, the enzymic method showed 1.8-2.9 -fold higher AsA content than HPLC. The AsA content of natural fruit juices showed no appreciable difference between methods. These findings suggest that the enzymic method cannot determine accurately the AsA content of concentrated-restored fruit juices. Whether a fruit juice is concentrated-restored or natural can probably be distinguished by the difference in AsA content using the enzymic and HPLC methods.
著者
野田 勉 清水 充
出版者
(社)大阪生活衛生協会
雑誌
生活衛生 (ISSN:05824176)
巻号頁・発行日
vol.44, no.1, pp.13-19, 2000-01-30 (Released:2010-03-11)
参考文献数
20
被引用文献数
5

An antimicrobial agent, hiba oil, was examined for contact allergenicity in a modified guinea pig maximization test. Hiba oil produced weak contact allergenicity by intradermal injection dose at ≥5, 000ppm and challenge doses at 5, 000ppm. Even at the highest intradermal dose of hiba oil (50, 000ppm), only half of the animals showed a positive skin reaction to the challenge patch of hiba oil at 5, 000ppm. Two antimicrobial components of hiba oil, hinokitiol and carvacrol, were not the critical substances of allergenicity, as these chemicals failed to cause positive skin reaction in a cross-sensitization test.
著者
山崎 祥史 福田 真一 白石 浩荘 泉 康雄
出版者
(社)大阪生活衛生協会
雑誌
生活衛生 (ISSN:05824176)
巻号頁・発行日
vol.50, no.2, pp.84-88, 2006 (Released:2006-04-07)
参考文献数
21

Eighty kcal of rice crackers containing indigestible dextrin (4.6g/21g) were administered as test samples to 27 healthy adults (18 males and 9 females) and the postprandial rise of blood glucose levels were compared with placebo samples (80kcal, 17.8g) not containing indigestible dextrin. As a result, test samples showed lower blood glucose levels (p <0.05) at 15 and 30 minutes after intake compared to placebo samples.This result suggests that rice crackers containing indigestible dextrin are useful for primary prevention of diabetes.
著者
今井 長兵衛
出版者
(社)大阪生活衛生協会
雑誌
生活衛生 (ISSN:05824176)
巻号頁・発行日
vol.48, no.6, pp.341-352, 2004 (Released:2005-01-27)
参考文献数
21
被引用文献数
3

The possibility of West Nile virus (WNV) activity in Japan is discussed in reference to WNV ecology and epidemics in the USA, where the virus appeared in 1999 and rapidly expanded its distribution area with increasing numbers of patients. The arrival of WNV in Japan would occur through three transporting systems: WNV-infected mosquitoes carried mostly by plane; import of infected pet birds; and migration of infected wild birds. Once in Japan, the spread and symptoms of WNV disease among human beings and horses would be more serious and drastic in Japan than in the USA. The reasoning for this is that the level of cross-immunity of Japanese against WNV induced by the smaller wave of recent epidemics of the closely related Japanese encephalitis virus must be lower than that of Americans due to the larger wave of recent epidemics of the closely related Saint Louis encephalitis virus. Public participation as well as governmental efforts would be a vital necessity to prevent the arrival of WNV and to control epidemics after arrival. As countermeasures, surveys of three subjects should be conducted first: vector mosquitoes inside planes from WNV epidemic regions, including the USA; dead birds infected with WNV; and vector mosquito breeding sites. Second, reduction of breeding sites and/or application of insect growth regulator (or insecticides) should be carried out in and around dwellings and workplaces. Third, citizens should be encouraged to protect themselves from mosquito bites.
著者
加田平 賢史
出版者
(社)大阪生活衛生協会
雑誌
生活衛生 (ISSN:05824176)
巻号頁・発行日
vol.54, no.3, pp.193-203, 2010-07-30 (Released:2010-08-10)
参考文献数
44

Pollutants are emitted into the atmosphere by human activity and are later deposited partly in the hydrosphere such as in ponds and lakes. Sediments in the hydrosphere retain the environmental pollutants over a long time. Using this property of sediments, many studies have revealed the historical changes in environmental pollution by sampling columnar sediment cores from the hydrosphere and estimating the deposition age of the core materials.The sources of lead can be determined using lead isotope ratios, which vary depending on the source mine. The measurement of lead isotope ratios in sediment cores is therefore very useful for identification of the historical source of environmental lead pollution.Lead in sediments is however derived from both anthropogenic sources and natural input and the lead isotope ratios of the sediment therefore consist of values averaged from the two sources. The present review describes a useful method of extracting anthropogenic lead from sediment and estimating its isotope ratios. This method can be used to estimate the isotope ratios of anthropogenic lead at the time of deposition in the environment of the sampling site. It also enables comparison of the isotope ratios of anthropogenic lead in one sediment with those in other sediments.