The nature of animal light

Harvey, E. Newton

doi:10.5962/bhl.title.3974

Cited by 15 publications

(19 citation statements)

References 18 publications

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“…I n the second edition of Buchner's book (1930), however, the matter is left undecided. Harvey and Hall (1929) demonstrated that the development and functioning of the adult light organ in Photuris pennsylvanica is unaffected by ablation of the larval organs. They concluded, therefore, that bactrria are not concerned with luminescence.…”

Section: Annals New York Academy Of Sciencesmentioning

confidence: 99%

The Anatomy and Physiology of the Light Organ in Fireflies

Buck¹

1948

Annals of the New York Academy of Sciences

102

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Section: Annals New York Academy Of Sciencesmentioning

confidence: 99%

The Anatomy and Physiology of the Light Organ in Fireflies

Buck¹

1948

Annals of the New York Academy of Sciences

102

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“…Each cubic centimeter of eggs corresponded to approximately 5 X 106 eggs. The cytochrome oxidase values per cubic centimeter of eggs were converted to a wet weight and a dry weight basis using an egg density of 1.08 (10) and an egg solid content of 18 per cent (11). To carry out the preparation, the eggs, either unfertilized or at 30 minutes after fertilization at 20°C., were packed tightly by centrifuging at 2000 times gravity for l0 minutes.…”

Section: Experim'ental Methodsmentioning

confidence: 99%

Studies on Cell Metabolism and Cell Division

Krahl

Keltch

Neubeck

et al. 1941

Journal of General Physiology

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1. An enzyme capable of oxidizing reduced cytochrome c (i.e. a cytochrome oxidase) has been obtained from Arbacia eggs. In 0.02 M hydroquinone, the cytochrome oxidase was half activated at a cytochrome c concentration of approximately 4 x 10–6 M. The concentration of the cytochrome oxidase was found to be nearly the same in unfertilized and fertilized eggs, the amount of the enzyme—as measured by means of its activity toward cytochrome c as a representative substrate—being more than sufficient to account for the highest rate of oxygen utilization yet observed in the intact, living, fertilized eggs, and of the same order as that in certain rat tissues. 2. The Arbacia cytochrome oxidase was strongly inhibited by carbon monoxide in the dark, the inhibition being almost completely reversed by light. The inhibition constant was not greatly altered by variation in the concentration of cytochrome c or the concentration of hydroquinone used as reductant for the cytochrome c, having a value of 3 to 5 under the conditions used. The inhibition constant was about 2 with p-phenylenediamine as reductant for the cytochrome c, but apparently had the surprisingly low value of about 0.5 with 0.02 M cysteine as reductant. 3. The cytochrome oxidase was completely inhibited by sufficiently high concentrations of sodium cyanide, sodium azide, and sodium sulfide. It was also completely inhibited in 0.6 M sodium chloride. It was not inhibited by two inhibitors of copper containing enzymes, 8-hydroxyquinoline and sodium diethyldithiocarbamate. It was also not significantly inhibited by 2,4-dinitrothymol, 2,4-dinitro-o-cyclohexylphenol, phenylurethane, 5-isoamyl-5-ethylbarbituric acid, or iodoacetic acid. 4. Quantitative examination of the fertilized eggs showed that cytochrome c, if present at all, occurred in a concentration of less than 2 micrograms per gram of wet fertilized Arbacia eggs. On the basis of these data and those of Fig. 2, above, it seems safe to conclude that cytochrome c cannot carry a significant fraction of the oxygen consumption of fertilized Arbacia eggs. It was also found that, in contrast to similar preparations from certain other animal tissues, the Arbacia cytochrome oxidase preparation displayed no succinic dehydrogenase activity when tested manometrically in the presence of excess cytochrome c. 5. Extending previously reported (3) experiments with other inhibitors, the effects of sodium azide and sodium sulfide on the respiration and cell division of fertilized Arbacia eggs were determined, the eggs being initially exposed to the reagents 30 minutes after fertilization at 20°C. With either reagent cleavage was completely blocked by a concentration of reagent which reduced the respiration to approximately 50 per cent of the normal level. 6. On the basis of certain theoretical considerations regarding the possible mechanism of action of cyanide and other respiratory inhibitors it is suggested that a fraction of the respiration apparently concerned with supplying energy for division processes in the fertilized Arbacia egg may be keyed into the respiratory cycle through a carrier having a somewhat higher potential than those which carry the larger portion of the egg respiration. The theory is also employed in an effort to resolve a number of hitherto apparently paradoxical observations regarding the effects of cyanide, azide, and carbon monoxide on cell respiration.

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“…Judean forensic process differed from Roman in three principal areas (Falk: 98-110;Harvey;Derrett 1971: 178-91).…”

mentioning

confidence: 98%

The Trials (Forensic) and Tribulations (Honor Challenges) of Jesus: John 7 in Social Science Perspective

Neyrey

1996

Biblical Theology Bulletin: Journal of Bible and Culture

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John 7-8 is unified on the narrative level in terms of the Feast of Tabernacles, at which prayers were made for rains and sunlight. Jesus declares himself to be the source of those benefactions and thus deserving of the nation's petitions and praise: he is the living water (7:36-38) and the light of the world (8:12). More importantly, the events at the feast are all structured in terms of forensic processes against Jesus. The trial that began in John 5 continues, but with a Johannine twist. Jesus warns the audience on judging justly. We examine each scene in John 7 in light of forensic process, noting the unity of the narrative in light of forensic process and assessing the ideological perspective of the narrator on whether the witnesses and judges judge justly; for it is a Johannine twist to "judge the judges of Jesus." Finally, forensic process should itself be assessed in terms of the dominant values of the ancient world, honor and shame. The push and shove of forensic charge and defense should be seen as the Johannine version of the ubiquitous challenge and riposte recorded by the Synoptics. Thus narrative, literary, and cultural considerations are brought to bear on behalf of an adequate interpretation of John 7.

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The nature of animal light

Abstract: Co-enzyme, 104, 130 Co-luciferase, 107 ff Color of animal light, 41 ff, 157 ff Concentration and luminiscence, 145 ff

Cited by 15 publications

References 18 publications

The Anatomy and Physiology of the Light Organ in Fireflies

The Anatomy and Physiology of the Light Organ in Fireflies

Studies on Cell Metabolism and Cell Division

The Trials (Forensic) and Tribulations (Honor Challenges) of Jesus: John 7 in Social Science Perspective

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