S-G-6. Experimental Transplanation of the Head

Terao, Hideo; Hayakawa, Isao; Kamano, Shuji; Saito, Isamu

doi:10.2176/nmc.7.124

Cited by 2 publications

(5 citation statements)

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“…Methyl arachidonate (99+ %) was purchased from Sigma Chem., St. Louis, MO. Isomeric MeHPETE was prepared using methylene-bluesensitized photooxidation of methyl arachidonate in ethanol solution according to the method described previously (11).…”

Section: Methodsmentioning

confidence: 99%

“…Fractions were divided into 2 parts, one of which was subjected to GLC and gas chromatography-mass spectrometry (GC-MS) analysis for determination of the quantities and isomeric compositions of MeHPETE. The derivatization procedure and conditions of GC-MS were the same as described previously (11). Methyl heptadecanoate was used as the internal standard in GC analysis.…”

Section: Determination Of the Isomeric Compositions Of The Fractionsmentioning

confidence: 99%

“…We have determined the isomeric composition of methyl ester of hydroperoxy eicosatetraenoic acid (MeHPETE) produced from singlet oxygen oxidation (11) and hemeproteincatalyzed peroxidation of methyl arachidonate (12). On the other hand, Porter et al (5,13) succeeded in isolating HPETE isomers of biological importance from peroxidized arackidonic acid by using high performance liquid cfiromatography (HPLC).…”

Section: Introductionmentioning

confidence: 99%

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Thiobarbituric acid reaction of methyl arachidonate monohydroperoxide isomers

Terao

Matsushita

1981

Lipids

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Methyl ester of monohydroperoxy eicosatetraenoic acid (MeHPETE) was prepared from methylene blue sensitized photooxidation products of methyl arachidonate. The thiobarbituric acid (TBA) value of MeHPETE was increased by adding ferrous sulfate to the reaction mixture. A linear relationship existed between the TBA value and the concentration of MeHPETE when ferrous sulfate was added. By using high performance liquid chromatography, MeHPETE was separated into 5 fractions whose isomeric compositions were determined by gas chromatography-mass spectrometry. The results of the TBA test for each fraction suggest that all of the MeHPETE isomers are positive to the TBA test. It is concluded that each isomer of HPETE formed by peroxidation of arachidonic acid in a biological system can yield TBA-reacting materials during the test reaction.

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Section: Methodsmentioning

confidence: 99%

Section: Determination Of the Isomeric Compositions Of The Fractionsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Thiobarbituric acid reaction of methyl arachidonate monohydroperoxide isomers

Terao

Matsushita

1981

Lipids

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“…In his opinion this glued the two primary membranes together, thereby ensuring adequate protection for the developing egg. Finally, Terao (1919) states that around the attached egg of Panulirus japonicus there is an outer, so-called first eggmembrane, which agrees in staining reactions and '' granulosity " with the secretion in the cement glands and an inner " chorion," or second egg-membrane, which he thought was formed by the oviduct. He gives no evidence for the latter statement and only that outlined above for the former statement, but, as w ill be shown in the course of this paper, he was correct in both assumptions.…”

mentioning

confidence: 96%

“…2. Cement from Oviducts andlor Spermathem.-Cavolini (1787), Milne-Edwards (1834-40), Erdl (1843), Huxley (1880), Ishikawa (1885)) Can0 (1891), Bumpus (1891), Scott (1903), Peters, Panning, and Schnakenbeck (1933 Andrews (1904Andrews ( , 1906, Marquard (1926)) Terao (1919). 5 .…”

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confidence: 99%

The Nature and Significance of the Membranes surrounding the Developing Eggs of Homarus vulgaris and other Decapoda.

Yonge

1938

Proceedings of the Zoological Society of London

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Summary. The female reproductive organs and secondary sexual characters of Homarus vulgaris are described, in particular the pleopods, which possess seven groups of long non‐plumose setæ. The developing eggs are attached, either directly or by way of other eggs, exclusively to these setæ. Attachment is by means of strands of transparent “cement” (the funiculus), which also forms the outer membrane of the egg, surrounding an inner membrane which adheres closely to the egg mass. Chemical and physical tests reveal that the outer membrane has properties identical with those of the superficial cuticle of the integument. The inner membrane is chitinous. Experiments on the penetration of a variety of substances into the developing egg indicate that the outer membrane has the limited permeability of cuticle, the inner membrane being freely permeable. The inner membrane is secreted by the oviducal epithelium, the histological character of which varies in relation to egg‐laying. Secretion of chitin indicates that the oviduct may be ectodermal. The outer membrane is formed by cement glands present in great numbers within the pleopods of the female, and these resemble in all respects the tegumental glands which secrete the cuticle. Secretion by the cement glands is associated with egg‐laying, not with ecdysis. The ducts from the glands pass into the interior of the specialized non‐plumose setæ, circumstantial evidence indicating that the secretion is discharged through the sides of these. This would explain the attachment of eggs exclusively to these setæ. In Decapod Crustacea there is an intimate association between ecdysis and reproduction, the sequence of events being outlined. Available evidence points to fertilization occurring externally in the Astacura, and the complicated structure of the spermatozoa may be correlated with the need for the penetration of the inner chitinous membrane. Egg‐attachment involves low surface tension in the cement, a property already postulated for the cuticle. The limited permeability of the outer membrane formed by this means renders osmotic hatching possible. Attachment of eggs in Homarus and allied Decapoda represents the exploitation of a substance which forms the outer covering of the integument and the properties of which—probably low surface tension, slow solidification in water, final hardness, and limited permeability—combine to make it ideal for both purposes. The sequence of events involved in egg‐laying and attachment indicates the probability of control by hormones. With the exception of the Peneidæ there appears no reason for assuming that the method of egg‐attachment differs in any essential particular throughout the Decapod Crustacea.

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S-G-6. Experimental Transplanation of the Head

Cited by 2 publications

References 0 publications

Thiobarbituric acid reaction of methyl arachidonate monohydroperoxide isomers

Thiobarbituric acid reaction of methyl arachidonate monohydroperoxide isomers

The Nature and Significance of the Membranes surrounding the Developing Eggs of Homarus vulgaris and other Decapoda.

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