巻号一覧
41 巻, 5 号
選択された号の論文の13件中1～13を表示しています
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広瀬 敏夫1975 年 41 巻 5 号 p. 493-497
発行日: 1975/05/25
公開日: 2008/02/29
ジャーナル フリーIn Iwate Prefecture, the harvests of marine algae, especially brown algae is most significant as representative of the inshore fisheries.
An attempt, has been made by using the annual statistics on “wakame” harvest, Undaria pinnatifida, to clear the composition of harvests by cultivation and from natural beds in Iwate Prefecture. The harvest data use were for the periods from 1963 to 1972.
The analysis showed an evident negative relation between harvest by cultivation and that from natural beds or the number of the equipments use in the cultivation. The equipment, anchored by concrete blocks on the sea bed, consists of the cultivating ropes extended in upper layer of the sea. The upper limit of the total length of the cultivating ropes used in the prefecture was estimated to be 6-7 million meters.
The decrease in the harvests from natural beds may be caused by the shifting of the cultivating ground fom the natural habitats of “wakame”.抄録全体を表示PDF形式でダウンロード (302K) -
高橋 裕哉1975 年 41 巻 5 号 p. 499-506
発行日: 1975/05/25
公開日: 2008/02/29
ジャーナル フリーIn order to obtain female unisexual broods of the guppy, Poecilia reticulata, the possibility of sex reversal of genetic female offspring was examined by daily oral administration of methyltestosterone (MT, 300-500μg/g diet) to gravid females during various periods of gestation. Treatments with 400μ MT initiated 8 to 10 days prior to parturition and lasting up to the end of gestation most successfully caused the birth of all male young, and resultant sex-reversed males were evidenced to be fertile to yield all female broods when mated naturally with normal females. Treatments for longer periods of gestation or with higher dosage of MT were liable to bring about a delayed and obstructed parturition accompanying the birth of dead embryos and an infertility of sex-reversed males. This manner of hormone application was considered to be more facile and stable as compared with the method reported previously in obtaining sex-reversed, functional males of the guppy.抄録全体を表示PDF形式でダウンロード (531K) -
青木 一郎, 黒木 敏郎1975 年 41 巻 5 号 p. 507-513
発行日: 1975/05/25
公開日: 2008/02/29
ジャーナル フリーThe alarm reactions of Japanese cyprinids, Ugui, Tribolodon hakonensis, Tamoroko, Gnarhopogon elongatus elongatus, and Tairiku-baratanago, Rhodeus ocellatus ocellatus were examined by an objective method based on an elaborate experimental design. Three species of cyprinids showed the alarm reaction to the conspecific skin extract. G. elongatus elongatus also reacted weakly to the conspecific muscle extract, whereas T. hakonensis reacted to neither muscle nor viscera extract. It was estimated by measuring the actual concentration of sample in the experimental tank that conspecific skin extract was effective at a concentration of 2.5-0.5mg (wet weight, skin)/l(water) in T. hakonensis and 0.5-0.1mg/l in G. elongatus elongatus. In interspecific test G. elongatus elongatus reacted strongly to the skin extracts of the other two species, and T. hakonensis reacted to only that of G. elongatus elongatus, and R. ocellatus ocellatus reacted to that of neither species.抄録全体を表示PDF形式でダウンロード (356K) -
加藤 増夫1975 年 41 巻 5 号 p. 515-528
発行日: 1975/05/25
公開日: 2008/02/29
ジャーナル フリーSome field experiments on board a two-boat trawler were made with an under-water echo-sounder of 200 kHz in the East China Sea in November, 1973.
Throuthout the experiment, the three transducers were tightly fixed onto the three respective positions, i. e., the center and both ends of the front head rope of the square part of the trawl net. Thus, three series of echograms from fish schools, which pass through under the respective transducers, were drawn separately on an echo chart during trawling at a speed of 4 knots.
The interrelation between the number of fish traces on the respective echo charts and the catch per haul were considered acoustically and statistically as follows:
1. The amount of fish school that passes into the trawl net along each sides near the wing net at the net mouth, might be about 26% more than that center part.
2. The highest correlation coefficient of catch per haul among respective number of fish, estimated from three series of echo charts per haul, was found to be 0.72 for that from the center transducer.
3. The author suggests that it may be possible for the transducer in such a system to be attached onto the center of the head rope to predict the amount of trawl catch.抄録全体を表示PDF形式でダウンロード (1999K) -
メダカでの抱合体の化学構造志村 勝, 関沢 泰治1975 年 41 巻 5 号 p. 529-534
発行日: 1975/05/25
公開日: 2008/02/29
ジャーナル フリーThe metabolite of 2-amino-4-phenylthiazole in medaka (killifish, Oryzias latipes) was isolated as white crystals from environmental water in which the fish were treated with the anesthetic. Acid hydrolysis of the metabolite gave crystallize 2-amino-4-phenyl-thiazole and a spot on TLC coinciding with that of D-glucuronic acid. Gas chromatography of the metabolite after methanolysis and trimethylsilylation gave peaks coinciding with those of authentic D-glucuronic acid and 2-amino-4-phenylthiazole The colour reaction of the metabolite suggested that the conjugation site of these two constituents was the primary amino group of the thiazole ring and the aldehyde group of glucuronic acid Reaction of D-glucuronic acid and 2-amino-4-phenylthiazole in 50% acetone under reflux resulted in the formation of a product identical with the naturally occurring metabolite. The NMR spectrum of the metabolite in D2O revealed that the structure of the sugar moiety was β-D-glucopyranosiduronic acid. Thus it was concluded that the chemical structure of the metabolite in medaka should be 2-amino-4-phenylthiazole 2-N-β-D-glucopyranosiduronic acid.抄録全体を表示PDF形式でダウンロード (360K) -
徳永 俊夫1975 年 41 巻 5 号 p. 535-546
発行日: 1975/05/25
公開日: 2008/02/29
ジャーナル フリーThe rate of thermal decomposition of TMAO in muscle of different species of marine animals was investigated. The results obtained were summarized as follows.
1. The rate of thermal decomposition of TMAO varied widely with the species of marine animals, and was generally small in so called white-fleshed fish and considerably high in red-fleshed fish,
2. The ratios of DMA-N to total decomposed products (DMA-N+TMA-N) were high in mollusks, medium in ordinary muscle, and relatively low in dark muscle of fish.
3. When the pH of fish muscle was adjusted by addition of some agents it was observed that TMAO was more rapidly decomposed at the lower pH of muscle. But among different species of fish, even at the same pH, remarkable variations in the rate of decomposition of TMAO were found.
4. Hemoprotein accelerated most effectively the thermal decomposition of TMAO. In the presence of hemoglobin at a high concentration such as 0.5%, TMA was dominant among the thermal decomposition products of TMAO.
5. Though amino acids generally had little accelerating effect on the decomposition of TMAO, cysteine had a significant effect.
6. The thermal decomposition of TMAO proceeded even at temperature lower than 100°C. The lowest temperature seem to be 55-60°C.抄録全体を表示PDF形式でダウンロード (754K) -
ビンナガマグロ水煮缶詰について徳永 俊夫1975 年 41 巻 5 号 p. 547-553
発行日: 1975/05/25
公開日: 2008/02/29
ジャーナル フリーTo clarify the relation between the freshness of raw fish and the quality of the canned product, authentic canned albacore meat prepared from fish stored for varying times was analyzed for the content of TMAO and its related compounds, TMA and DMA. The results obtained were summarized as follows:
1. The ratio of TMAO remaining undecomposed to the total content of TMAO and its related compounds is recommended as a convenient index for freshness of raw fish.
2. As considerable amounts of NH3 and TMA are produced during heating in the canning process, it is impossible to evaluate the quality of the canned product by determining these compounds.
3. The ratio of DMA-N to TMA-N in the canned meat seemed to be a useful index for evaluating the quality of canned albacore.抄録全体を表示PDF形式でダウンロード (462K) -
森 勝義, 佐藤 隆平1975 年 41 巻 5 号 p. 555-560
発行日: 1975/05/25
公開日: 2008/02/29
ジャーナル フリーReactions of the key enzymes in steroidogenesis were demonstrated histochemically in the tissues of the immature Chum salmon, Oncorhynchus keta, reared in a saltwater pond. Activities of enzymes associated with the biosynthesis of steroid hormones were also observed in the fish tissues.
1. A positive reaction of the key enzyme, 3β-hydroxysteroid dehydrogenase, related to steroidogenesis was detected only in the tissues of the interrenal gland in the head kidney of the fish.
2. Reaction of the key enzyme, 17β-hydroxysteroid dehydrogenase, related to steroidogenesis was not detected in the tissues of the organ of fish examined.
3. The reaction of the enzyme, glucose 6-phosphate dehydrogenase, was observed in the tissues of the fish organs examined.
4. The reaction of the enzyme, isocitrate dehydrogenase, was observed slightly in the tissues of organs such as nephron of the mesonephros, liver, interrenal gland and cardiac muscle of the fish.抄録全体を表示PDF形式でダウンロード (1581K) -
高木 光造, 飯田 優, 岡 重美1975 年 41 巻 5 号 p. 561-565
発行日: 1975/05/25
公開日: 2008/02/29
ジャーナル フリーConcentrations of polychlorinated biphenyls (PCB) were determined in four species of zooplankton collected from six locations in the North Pacific Ocean in April-May, 1974. The results showed that PCB concentrations in Euphausia pacifica, Calanus plumchrus, C. cristatus, and Aglantha digitale were 0.07-0.08, 0.19, 0.10-0.11, and 0.02ppm, respectively. Levels of PCB in Euphausia and Copepoda were higher than those in salmon and trout feeding upon these zooplanktons in the same locations.抄録全体を表示PDF形式でダウンロード (286K) -
緑藻ヒトエグサからの新ベタインUlvalineの単離とその血漿コレステロール低下作用阿部 重信, 金田 尚志1975 年 41 巻 5 号 p. 567-571
発行日: 1975/05/25
公開日: 2008/02/29
ジャーナル フリーA new betaine, ulvaline ws isolated as a picrate from a green laver Monostroma nitidum and named after its order name Ulvales. Subsequent chemical studies of ulvaline revealed the structure of 3-O-(2, 3-dihydroxy-n-propyl)-1-carboxy-n-propyl trimethyl ammonium (O-1-glyceryl homoserine betaine). In the feeding experiment, ulvaline was proved to be a slightly hypocholesterolemic agent.抄録全体を表示PDF形式でダウンロード (255K) -
G6PならびにF6Pの蓄積原因(2)山中 英明1975 年 41 巻 5 号 p. 573-578
発行日: 1975/05/25
公開日: 2008/02/29
ジャーナル フリーAttempts were made to elucidate the mechanism of FDP accumulation, one of the key substances responsible for production of the orange discoloration during the 2-stage cooking of the skipjack meat. Addition of NAD to the skipjack meat which otherwise showed an orange discoloration on cooking (“orange-destined meat”) resulted in a marked decrease of FDP, G6P, and F6P content, and in a notable increase of lactate. The NAD-added meat did not produce any orange discoloration on cooking.
On the other hand, the NAD content of the typical “orange-destined meat” was determined to be 1-2mg/100g of raw meat, in contrast to 60-80mg/100g of the normal raw meat.
It could be concluded from these findings that when NAD disappeared in the meat the action of glyceraldehyde-3-phosphate dehydrogenase is stopped and glycolysis is practically ceased, resulting in the accumulation of large amounts of FDP, which is, in turn, converted into G6P and F6P by the action of FDPase.抄録全体を表示PDF形式でダウンロード (438K) -
丹羽 栄二, 中島 豪三1975 年 41 巻 5 号 p. 579
発行日: 1975/05/25
公開日: 2008/02/29
ジャーナル フリーPDF形式でダウンロード (74K) -
1975 年 41 巻 5 号 p. 608
発行日: 1975年
公開日: 2008/04/22
ジャーナル フリーPDF形式でダウンロード (20K)
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