Estimation of tea quality by infusion colour difference analysis
The colour differences in terms of deltaL, deltaa, deltab and deltaE between distilled water and infusions of 29 green teas, 16 black teas and 13 oolong teas and their correlation with sensory quality attributes of tea were investigated. The results showed that the deltaL value decreased but the deltaa, deltab and deltaE increased with the degree of fermentation of the three kinds of tea. The deltaL was positively correlated to quality attributes of green tea and oolong tea but negatively correlated to those of black tea. The deltaa of tea infusions is a reliable descriptor to differentiate among green and black teas. The regression of total quality score of green tea (TQSg) upon the deltaa was TQSg = -2.26deltaa + 77.2 (R2 = 0.22, p < 0.01), that of total quality score of black tea (TQSb) upon deltab was TQSb = 0.70deltab + 44.6 (R2 = 0.31, p < 0.05) and that of total quality score of oolong tea (TQSo) upon deltaL was TQSo = 1.09deltaL + 94.5 (R2 = 0.75, p < 0.01). Because the infusion colour difference indicators of deltaa, deltab and deltaL can be done rapidly, it could be very useful for on-site or on-line quality monitoring during tea manufacture and storage.
Estimation of the market value of Central African tea by theaflavin analysis
The price of plain and medium quality teas sold on the London auction on two separate occasions was closely correlated to their theaflavin content. An equation including theaflavin content and the colour of the tea liquor was derived, and explained 60% of the variation in market price at any one time. A very close agreement was found between theaflavin content and a broker's valuation. It is suggested that the results justify the use of theaflavin analysis as an objective assessment of tea quality in research.
THE RELIGIOUS SITES DURING THE CHINESE CULTURAL REVOLUTION, 1966-1976
This study presents a thought-provoking picture of statistical data regarding the growth patterns of the religious sites for five main Chinese religions during the Cultural Revolution from 1966 to 1976. Applying comparative and quantitative lenses, this paper addresses the diE™erent growth rates of religious sites during the four diE™erent periods from 1949 to 2004 to test the relative growth pace of religious sites during the Cultural Revolution. To understand the patterns of growing religious sites from 1966 to 1976, this study also compares the diE™erent growth rates of religious sites between the first phase (1966 to 1970) and the second phase (1971-1976) of the Cultural Revolution. Furthermore, it provides detailed information concerning the year of building new religious sites for all five major religions that hold more than 2,500 new religious sites during the Cultural Revolution. In addition, the study shows the top five provinces which built the most new religious sites while denoting their respective rural and urban locations in an eE™ort to demonstrate their geographical expansion during the period. Finally, this study addresses the growth rates of the national population and per capita GDP as compared to the growth of the religious sites during the period of national disaster (1966-1976).