Guide to Fluorescence Literature

Passwater, Richard A.

doi:10.1007/978-1-4684-6198-5

Cited by 8 publications

(4 citation statements)

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“…This effect has been noted by several investigators (2,14,15). To minimize it, the general recommendation of working with extremely dilute solutions has been made.…”

mentioning

confidence: 92%

Correction of right-angle fluorescence measurements for the absorption of excitation radiation

Holland¹,

Teets²,

Kelly³

et al. 1977

Anal. Chem.

142

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The effect of excitation beam absorption on measured values of fluorescence has been studied wlth a computer-centered spectrofiuorimeter capable of measuring fluorescence and absorbance slmuitaneously. This effect appears to be independent of the nature of the absorbing species and the excitation and emisslon wavelengths. A model is proposed and tested which corrects fluorescence, observed at 90°, for the attenuation of the excitation beam caused by the absorbance of the fluorophore and any chromophores present in the cell. The resuitlng absorptlon-corrected fluorescence is linear with the concentration of the fiuorophore in solutions wlth total absorbances as high as 2.0.

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“…This effect has been noted by several investigators (2,14,15). To minimize it, the general recommendation of working with extremely dilute solutions has been made.…”

mentioning

confidence: 92%

Correction of right-angle fluorescence measurements for the absorption of excitation radiation

Holland¹,

Teets²,

Kelly³

et al. 1977

Anal. Chem.

142

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“…There are a number of standard reference texts on fluorescence available for background reading (3, 9-12) which also give a good deal of information concerning quinine spectra. The American Instrument Company's fluorescence newsletter has had short articles on scatter interference (6) and the use of quinine as a fluorometric standard (13).…”

Section: Discussionmentioning

confidence: 99%

Quinine fluorescence spectra. A dry-lab spectral analysis experiment

O'Reilly¹

1976

J. Chem. Educ.

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“…The cohort consists of 223 men and 256 women (mostly husband and wife pairs) who completed a twopage questionnaire contained in the August 1974 issue (12) and who were California white residents and at least 65 years ofage at the time they completed the questionnaire. About 20,000 completed questionnaires were mailed to Richard A. Passwater from persons of all ages and all geographic areas (13), representing about a 1% response rate of all readers at that time.…”

Section: Methodsmentioning

confidence: 99%

Mortality among health-conscious elderly Californians.

Enstrom¹,

Pauling²

1982

Proc. Natl. Acad. Sci. U.S.A.

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In an attempt to obtain epidemiologic evidence regarding the mortality rate among vitamin supplement users, a prospective study was Only the cardiovascular SMR is significantly lower than 100%. The death rate for the males is approximately the same as that reported among other healthy nonsmoking questionnaire respondents, but the death rate for females is significantly less (P < 0.01). The only notable relationships between questions asked in 1974 and subsequent mortality are those indicating a higher mortality rate associated with inactivity, heart trouble, and very low and very high levels of vitamin E intake. For this highly selected cohort, the overall "Prevention life-style" appears to be a healthy one, but the cohort experiences no clear reduction in total mortality because of high levels of vitamin intake per se.Little reliable epidemiological information is available on the relationship between high levels of vitamin intake and mortality. The major prospective studies have concentrated on mortality in relation to factors such as tobacco consumption, alcohol consumption, serum cholesterol, some dietary habits, or other general health practices (1-4). One early study indicated that higher-than-average dietary intake of vitamins A and C was associated with a lower mortality rate (5). One recent study showed an inverse relationship between dietary vitamin A intake and lung cancer mortality but only a small nonsignificant inverse relationship with total mortality (6). Several other recent studies indicate that dietary vitamin A intake is inversely related to lung cancer and total cancer, and it has been suggested that vitamin A analogs may reduce cancer rates (7). None of these studies analyzed dietary supplements. It has been hypothesized that supplementary vitamin C may be beneficial in the prevention and treatment ofthe common cold (8) and cancer (9), although negative studies have been reported (10).The specific way in which vitamins may be causally related to cancer and other diseases is not clearly established. Nevertheless, the general public has shown great interest in this subject and the use ofvitamin supplements has grown dramatically in recent years. Recent estimates indicate that up to 50% of all adults in the United States now use vitamin supplements to some extent (4), in spite oflittle direct evidence as to their value. For this reason alone further scientific investigation is warranted. However, such investigation is complicated by the fact that this topic has become associated over the years with speculative and anecdotal claims and counterclaims. In addition, the people who use these supplements are often experimenting with various types and quantities ofvitamins as well as changing other aspects of their life-style. Consequently, it is difficult to conduct a properly controlled study.We selected Prevention readers because an existing 1974 questionnaire survey was made available to us. This magazine was founded in 1950 by J. I. Rodale and now has about 2.5 million subscribers, fa...

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Guide to Fluorescence Literature

Cited by 8 publications

References 0 publications

Correction of right-angle fluorescence measurements for the absorption of excitation radiation

Correction of right-angle fluorescence measurements for the absorption of excitation radiation

Quinine fluorescence spectra. A dry-lab spectral analysis experiment

Mortality among health-conscious elderly Californians.

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