巻号一覧
52 巻, 6 号
選択された号の論文の27件中1～27を表示しています
- |<
- <
- 1
- >
- >|
-
小川 和夫1986 年 52 巻 6 号 p. 947-950
発行日: 1986/06/25
公開日: 2008/02/29
ジャーナル フリーDescription and identification is made of Gyrodactylus masu sp. n. collected from fins, body surfae, gilaments and gill arches of cultured salmonid flsh (Oncorhynchus masou, O. rhodurus and Salmo gairdneri) in Japan. The new species is most similar to G. derjavini Mikailav, 1975 in the shape of the hard parts, but different from it in the size of the hamuli and marginal hooks. Monthly monitoring of G. masu sp. n. on a single stock of Oncorhynchus masou was made during the period of May 1978 to Sep. 1979. There was a slight tendency that the hamuli and marginal hooks increased in length with decreasing water temperature and vice versa.抄録全体を表示PDF形式でダウンロード (204K) -
福田 雅明, 矢野 豊, 中野 広, 杉山 元彦1986 年 52 巻 6 号 p. 951-955
発行日: 1986/06/25
公開日: 2008/02/29
ジャーナル フリーProtein, DNA and RNA contents, together with the growth rates of body length and dry weight were measured for the cresthead flounder Limanda schrenki, during one month after hatching. The larvae showed no remarkable changes of external morphology in the first two weeks, started metamorphosis in the third week, and then into benthic phase in the fourth week. The maximum value of growth rates of body length and dry weight were observed in the second week. The changes in increasing rate of the protein showed the same tendency as that of dry weight. The values of protein increasing rate in the first week was almost equal to the growth rate of dry weight, while in the second week the former was lower than the latter. This result may be caused by the fact that some nonprotein materials accumulated in the second week. The pattern of changes in DNA content tended to be similar to changes in RNA content. The increasing rates of DNA and RNA were highest in the second week, and minimum rates were seen in the third week. Protein/DNA ratio indicated cell size, decreased rapidly during the first two weeks, whereas only in the third week did the ratio increase. The result indicated that cell proliferation occurred actively in the first two weeks and cell enlargement was taking place primarily in the third week. In the fourth week, there is less significant difference among the increasing rate of dry weight, protein, DNA and RNA.抄録全体を表示PDF形式でダウンロード (365K) -
梅崎 勇1986 年 52 巻 6 号 p. 957-963
発行日: 1986/06/25
公開日: 2008/02/29
ジャーナル フリーThe growth in Iength and weight of primary laterals in Sargassum rlnggoldianum Harv. subsp. coreanum (J. Ag.) Yoshida (Sargassaceae, Phaeophyceae) growing in Obama Bay, a branch bay of Wakasa Bay located in the middle part of Honshu facing the Japan Sea was studied on the basis of materials collected from October 1981 to October 1982. The number of primary laterals and scars on each branch of stem was counted and it was found that their number changed with the age of the plant. In stem V plant the stem I had an average of 4.5 leaves and 4.5 primary laterals, stem II with 6.6, stem III with 4.9, stem IV with 4.4 and stem V with 3.2. Among several primary laterals arising on each branch of stem, one to three of them grew to elongate longer than the others and in autumn they produced receptacles to maturity, falling from their stem branches. In September, they attained their maximum length and weight and with an average of 64.3cm (range: 29-100cm) and 11.7g (range: 1.8-42.0g), respectively. Mean weight of longer primary laterals on each branch of stem was: stem I1 0.9g, stem I2 5.54g, stem II 7.4g, stem III 5.36g, stem IV 4.36g, and stem V 2.0g. Shorter primary laterals 0-10cm long were found produced on stem throughout a year and their frequency to the total number of primary laterals was (11.1) 30.5-71.4 (85.7)%. From July to October, some primary laterals attained a height of 70-100 (110)cm and their frequency to the total number was (0.1)1.1-20.0(33.3)%. An annual produc-tion of primary laterals on stem III plant was estimated to be 83.56g (d.w.).抄録全体を表示PDF形式でダウンロード (526K) -
ラザニ ホセイン, 羽生 功1986 年 52 巻 6 号 p. 965-969
発行日: 1986/06/25
公開日: 2008/02/29
ジャーナル フリーGoldfish of the comet variety Carassrus auratus reared under natural conditions were trans-ferred to 24°C and 16°C combined with 12Land 16Lwith 1 to 2 month intervals, and maintained there for 1 to 2 months. Under natural conditions, most females started the regression by July. This stage was completed in August, then gonadal development commenced and continued till December. Vitellogenesis was blocked in winter, but resumed in late February. With rising temperature in March, gonadal maturation proceeded rapidly and resulted in spawning in about a month.
Under 24°C/12L, females remained suppressed in summer, atutumn and early winter, whilesome fish matured and spawned in late winter and spring. Except during summer, 24°C/16L stimulated gonadal maturation which culminated in spawning during off seasons. At 16°C, regardless of photoperiod, the gonadal development was always accelerated, although the speed of gonadal maturation was slower than under 24°C/16L.
Histologically, the liver cells as well as the gonadotrophs showed positive correlation with the ovarian activity, but the thyroid glands usually showed negative correlation with the ovarian activity.抄録全体を表示PDF形式でダウンロード (433K) -
青木 宙, 酒井 正博, 北尾 忠利, 高橋 誓1986 年 52 巻 6 号 p. 971-975
発行日: 1986/06/25
公開日: 2008/02/29
ジャーナル フリーAyu Plecoglossus alaivelis were immersed for 3 min in a 5% NaCl solution containing 1% lyophilized formalin-killed Vibrio anguillarurm. Two months after vaccination, each of the four experimental groups vaccinated fish were infected by intraperitoneal (i.p) injection of either 103, 104, or 106 cells of V. anguillarum PT479 streptomycin resistant (Smr)-strain or exposed to 106 cells/ml of PT479 Smr strain. The time period of elimination of the infecting organism depended on the number of cells of V. anguillarum given to the fish. The challenge organisms wera virtually eliminated within 6h after i.p. injection of 103 or 104 PT479 Smr cells in the blood and intestinal tracts. On the other hand, organisms increased 12h after injection of 103 or 104 cells/ml in non-vaccinated fish, reaching 106 cells/ml of blood and 105 cells/g in the intestinal tracts by 72h. The challenge organisms were observed in the blood and intestinal tracts of vaccinated fish Within 24h after i.p. injection of 106 cells. Subscquentry, the organisms decreased to 10 cells or less. The number of organisms increased in non-vaccinated fish after i.p. injection of 106 cells.
The number of challenge organisms was 10 cells/ml or g, or less, in the blood and the intestinal tracts of vaccinated fish 72h after exposure to 106 cells. The challenge organisms were also ob-served in the blood of non-vaccinated fish for 72h.抄録全体を表示PDF形式でダウンロード (370K) -
青海 忠久, タナンゴナン ジン・ベラン, 田中 克1986 年 52 巻 6 号 p. 977-982
発行日: 1986/06/25
公開日: 2008/02/29
ジャーナル フリーThe growth, development and metamorphosis of larval flounder Paralichthys olivaceus were examined at three temperatures of 13, 16 and 19°C in the laboratory. Under conditions of sufficient food supplies and reasonable stocking densities, temperature markedly influenced the larval growth, development and metamorphosis. The larvae grew to 20mm TL in 79, 44 and 33 days after hatching, especially during postlarval stage with average growth rates of 0.22, 0.43 and 0.59 mm/day at 13, 16 and 19°C, respectively. The integrated water temperatures in which fish grew to 20mm TL were approximated as being 970, 700 and 620°C day at 13, 16 and 19°C, respectively. Larval development was also prominently influenced by temperature, the mean residence time at each developmental stage (ten stages from hatching to early juveniles) was estimated as being 3, 4-5 and 8-9 days at 19, 16 and 13°C, respectively. Fish sizes immediately after complete metamor-phosis were found to be dependent on the ambient water temperature: the average body length at the last stage of metamorphosis was 11.0, 12.4 and 13.5mm BL (after fixation) at 19, 16 and 13°C, respectively. It was speculated that, in higher temperatures, the development and metamorphosis of flounder larvae rather than growth were stimulated.抄録全体を表示PDF形式でダウンロード (487K) -
岡崎 登志夫1986 年 52 巻 6 号 p. 983-994
発行日: 1986/06/25
公開日: 2008/02/29
ジャーナル フリーDistribution and migration paths of chum salmon populations distributed in the waters northeast off Japan from autumn to spring were examined based on allelic frequencies and some biological characteristics. Two distinct maturity classes, namely maturing and immature fish were observed among autumn collections and significant allelic differences were found between them. The allelic differences of maturing fish as well as their tag recovery data indicated that maturing chum salmon population mainly consists of the fish returning to Japanese rivers.
Since immature collections taken in autumn and maturing collections taken in spring during their northward shifts were statistically very similar, it is considered that the former has a link with the latter. Allelic frequencies of these fish corresponded better with known frequencies of populations of the Amur River area in the Soviet Union. The above as well as minimal tagging data suggest that the immature fish wintercd in southern waters and subsequently migrated to the north to approach the Amur River area as maturing fish.抄録全体を表示PDF形式でダウンロード (793K) -
クルトア フランソワ・, 隆島 史夫, ビヤー ローラン・1986 年 52 巻 6 号 p. 995-997
発行日: 1986/06/25
公開日: 2008/02/29
ジャーナル フリーThree-year old male carp kept under natural photoperiod and temperature received carp pituitary homogenates (cph) or HCG (3mg or 1000-2000 IU, respectively, per kg of body weight) in May, June and September. The volume of the milt collected 2 days after cph injection was significantly (P<0.01) higher than in the control. The same result was obtained when this treat-went was repeated every week for 1 month. No further spermiation occurred after 2 days since no milt was found 7 or 10 days after cph injection. This lack of response at 7 days was also found even when milt was not collected after 2 days, suggesting that the sperm disappeared from the genital tract. HCG had no effect.抄録全体を表示PDF形式でダウンロード (198K) -
川合 英夫1986 年 52 巻 6 号 p. 999-1004
発行日: 1986/06/25
公開日: 2008/02/29
ジャーナル フリーAnalyzing echo-sounding and experimental fishing data, Ohkawa and Misu have estimated the daily abundance of the Japanese anchovy Engraulis japonica in Yuya Bay. Using data of the abundance and commercial catch, and assuming the natural mortality coefficient, M. to be 5×10-8 s-1, this paper estimates magnitudes of the fishing mortality coefficient, F, and the immigration-emigration coefficient, I, for one or two days. Plots of |I| estimated by this and other papels vs. the time-scale, T, adopted in the respective papers show a relation, |1|=0.1/T to √10/T; due partly to offsets of positive and negative values of I for long T. Usually, both of Gi and M<10-7 s-1 where Gi is the individual growth coefficient; F<3×10-7 s-1. When T is shorter than five days or so, I should dominate over them.抄録全体を表示PDF形式でダウンロード (396K) -
浮 永久, 煙山 彰, 渡辺 武1986 年 52 巻 6 号 p. 1005-1012
発行日: 1986/06/25
公開日: 2008/02/29
ジャーナル フリーA feeding experiment was carried out by feeding juvenile abalone Haliotis discus hannai with diets containing casein or white fishmeal as a protein source at different protein levels (0-55%) for 50 days at a water temperature of 20°C in order to determine an optimum protein level in the diet for the abalone.
In the abalone receiving the casein diets, feed conversion efficiency (FCE) and protein reten-tion were found to be proportional to the dietary protein levels and reached plateau at a 38% protein level where the values for PER and NPU were 2.4 and 48, respectively. The maximum rate of protein retention was obtained at a 10% protein level in the casein diet and at a 22% protein level in the white fishmeal diet. In addition, growth, FCE and protein retention in the abalone fed on the white fishmeal diets were all far inferior to those obtained by the casein diets. The values for PER and NPU obtained with the white fishmeal diets were about one half of those obtained with the casein diets. The difference in nutritional quality be-tween both of these protein sources was postulated to be due to low digestibility of white fishmeal protein in the abalone.
When casein is used as a protein source, an optimum protein level in the practical diets for juvenile abalone is estimated to be around 20-30% based on the growth rate, FCE, protein retention and NPU.抄録全体を表示PDF形式でダウンロード (555K) -
浮 永久, 杉浦 雅行, 渡辺 武1986 年 52 巻 6 号 p. 1013-1023
発行日: 1986/06/25
公開日: 2008/02/29
ジャーナル フリーTwo feeding experiments were conducted to determine the requirement of young (2-4g) abalone Haliotis discus hannai for essential fatty acids (EFA) by feeding them with diets containing various fatty acids at levels of 1 or 5% lipid for 80 days. Feeding a lipid free or an EFA deficient diet resulted in retarded growth and low feed conversion efficiency (FCE), together with an increased level of sterols in body lipids and ω9 fatty acids in the polar lipid fraction from both viscera and muscle.
Addition of 18:2ω6 and 18:3ω3 or ω3 highly unsaturated fatty acids (ω3 HUFA, a mixture of 20:5ω3 and 22:6ω3) to the diet improved weight gain and FCE. However, the effect of supplementation of 18:2ω6 or 18:3ω3 on growth and FCE was inferior to that of 20:4ω6 or ω3 HUFA. Feeding 18:2ω6 and 18:3ω3 resulted in elevation of 22:4ω6 and 22:5ω3 in the visceral polar lipids, respectively. However, such an elevation was not apparent in 22:5ω6 and 22:6ω3, suggesting a low ability of abalone to convert 22:4ω6 to 22:5ω6 and 22:5ω3 to 22:6ω3, respectiyely.
These results indicate that the abalone requires ω3 and ω6 HUFA as EFA. Judging from the growth rate and EFA index, Σω9/(20:4ω6+20:5ω3+22:6ω3) which was less than 0.8 in the abalone receiving diets with sufficlent amounts of EFA. The requirement of the abalone for ω3 HUFA was estimated to be about 1% of the containing 5% lipid. The requirement was also found to be variable due to dietary lipid level.抄録全体を表示PDF形式でダウンロード (851K) -
佐藤 実, 菅野 信弘, 佐藤 美和, 秦 満夫1986 年 52 巻 6 号 p. 1025-1027
発行日: 1986/06/25
公開日: 2008/02/29
ジャーナル フリーThe capacity for the biosynthesis of D-rhodoic acid from taurine and pyruvic acid was studied in the tissues of abalone Halioris discus hannai using radioactive tracer methods. D-Rhodoic acid, a newly isolated marine natural product, has an interesting structure analogous to octopine, alanopine and strombine all of which are referred to as opines. Rhodoic acid has been shown to be one of the predominant nitrogenous components of muscle extractives of this abalone. Opines are generally considered to be end products of anaerobic glycolysis of molluscs.
Muscle and mid-gut gland homogenates were incubated with 10μCi of radioactive taurine or pyruvate, with gentle shaking at 30°C for 1h. D-Rhodoic acid was isolated by ion exchange chromatography and recrystallized from aqueous ethanol Incorporation of radioactivity into n-rhadoic acid from both taurine and pyruvate was observed in the muscle, but not in the mid-gut gland. It is likely that this biosynthesis is mediated by the action of rhodoic acid dehydrogenase which catalyzes the reductative condensation reaction:
taurine+pyruvate+NAAH ?? D-rhodoic acid+NAD++H2O.
Since D-rhodoic acid is the most commonly observed opine in abalone Haliotis discus hannai, it can be assumed that this dehydrogenase has an important physiological role such as the main-tenance of cytoplasmic redox balance in the muscle tissue during periods of elevated glycolytic flux.抄録全体を表示PDF形式でダウンロード (251K) -
滝口 明秀1986 年 52 巻 6 号 p. 1029-1034
発行日: 1986/06/25
公開日: 2008/02/29
ジャーナル フリーLipid oxidations in niboshi, boiled and dried anchovy Engraulis japonicus, with different lipid contents were studied.
In the case of fatty anchovy, percentage of highly unsaturated fatty acid (HUFA, C20:5 and C22:6) in the triglyceride fraction (TG) decreased rapidly during drying up to 5h at 25°C and then slowly up to 20h. Contrary to this, percentage of HUFA is the polar lipid fraction (PL) decreased slowly during drying up to 5h and then rapidly up to 20h. Thereafter, the per-centages of HUFA in the TG and PL were held at a similar level. A microscopic observation of the lipid distribution in fatty anchovy meat showed that the depot fat migrated to the inner portion of the muscular tissue in an early stage of drying. From these findings, it was suggested that the TG distributed in the surface portion of the fish was oxidized in an early stage of drying and that the oxidized TG penetrated into the inner portion of the muscular tissue to come in contact with the PL and participated in its oxidation.
In the case of lean anchovy, percentage of HUFA in the TG decreased rapidly during drying up to 5h and then slowly. On the other hand, percentage of HUFA in the PL decreas-ed slightly throughout the drying period. Microscopic observation on the lipid distribution in lean anchovy meat showed that the migration of the depot fat to the inner portion of the muscular tissue did not occur during drying. This seems to be one of the reasons that the PL in niboshi produced from lean anchovy is stable for oxidation.抄録全体を表示PDF形式でダウンロード (1096K) -
和田 俊, 小泉 千秋1986 年 52 巻 6 号 p. 1035-1038
発行日: 1986/06/25
公開日: 2008/02/29
ジャーナル フリーA large amount of histamine (Hm) was sometimes found in commercial products of rice-bran pickles of sardine. In order to elucidate the reason of the accumulation of Hm in the products, changes in the Hm contents of rice-bran of sardine prepared from high and low quality raw materials were examined during curing for eleven months. Volatile basic-nitrogen (VB-N) and pH were also determined. Hm was analyzed by gas liquid chromatography.
The results, VB-N increased rapidly during the first five months of curing and reached the maximum level after nine months. While, pH was decreased gradually to acidic side and reached 5.5-5.6 after three months of curing and then increased beyond the level of pH 8.0 after tenmonths. The content of Hm increased for up to several months of curing, and amounted to the highest level of 46.4mg/100g through the curing period. After eleven months of curing, however, the content of Hm decreased less than 1.5mg/100g. In this stage, only a small amount of histidine remained in the product.
These results suggested that the pH and temperature influenced the accumulation of Hm in the rice-bran products of sardine in an early stage of curing because of the relative low pH (5.5) and high temperature (20°C) which were favorable for action of bacterial decarboxylase. On the other hand, decrease in Hm contents in a later stage of curing seemed to be due to increasing pH (8.0) favorable for the action of bacterial histaminase.
The accumulation of Hm was recognized in the products prepared from low quality raw material rather than that of high quality one.抄録全体を表示PDF形式でダウンロード (274K) -
丹羽 栄二, 甲田 真一郎, 加納 哲, 中山 照雄1986 年 52 巻 6 号 p. 1039-1042
発行日: 1986/06/25
公開日: 2008/02/29
ジャーナル フリーAfter freezing overnight at-2°C, various actomyosin (AM) and actin (Ac) solutions underwent the fluorometric measurements in the presence of sodium 8-anilino-1-naphthalene sulfonate (exciting wavelength: 365nm, emission wavelength: 470nm). For AM solutions, their fluorometric intensity was increased on freezing. This increment was mare remarkable for fish than for warm blooded animal. However, the increase in fish was depressed by the addition of 10% sucrose or 0.2% monosodium glutamate. The intensity of fish Ac was hardly increased on freezgng.
Therefore, it is suggested that the hydrophobic amino acid residues of AM are exposed on freezing, and this is more remarkable for fish than for warm blooded animal, but their exposure for fish is suppressed by cryoprotectants. This conclusion is the same as that derived from the previously reported SDS adsorption method. Furthermore, it is also suggested that their exposure from AM is due to myosin rather than to Ac.抄録全体を表示PDF形式でダウンロード (331K) -
佐藤 守, 吉中 禮二, 西中 義裕, 森本 晴之, 小島 朝子, 山本 義和, 池田 静徳1986 年 52 巻 6 号 p. 1043-1047
発行日: 1986/06/25
公開日: 2008/02/29
ジャーナル フリーThe differences in the contents of nutritive components of meat were examined between wild and cultured bastard halibut, which were obtained from a fisherman and a fish farmer, respectively, in Okayama Prefecture. The crude fat content was higher in the cultured fish than in the wild fish. However, there was no appreciable difference in the compositions of essential amino acids, fatty acids, and minerals, and in the contents of vitamin A and E between the wild and cultured fish. These results indicate that the cultured fish is comparable to the wild fish with regard to nutritive values. It was also found that lipid and protein in the meat of the bastard halibut are of good quality as nutrients for man.抄録全体を表示PDF形式でダウンロード (383K) -
甲斐 徳久, 上田 正, 武田 道夫, 武田 靖昭, 片岡 昭吉1986 年 52 巻 6 号 p. 1049-1053
発行日: 1986/06/25
公開日: 2008/02/29
ジャーナル フリーThe levels of mercury and selenium in twenty-eight gonad specimens of two species of tunas, i.e., sixteen individuals of yellow fin Thuunus albacares and twelve individuals of albacore Thunnus alalunga, are presented.
Total mercury content (T-Hg) correlated significantly between gonad and muscle, and T-Hg in gonad was about 30% of that in the muscle. The ratio of methyl mercury content (MeHg) to T-Hg in gonad was small compared with that in the muscle.
Selenium content (Se) was relatively high, and Se in yellow fin was significantly high compared with that in albacore. Moreover, in both the species, Se in the ovary was significantly high com-pared with that in the testis. The molar ratio (Se/Hg) of Se to T-Hg correlated negatively with T-Hg, and tended to get nearer to 1 with the increase in T-Hg.抄録全体を表示PDF形式でダウンロード (306K) -
磯 直道, 水野 治夫, 斎藤 隆英, 王 慥, 成田 正直1986 年 52 巻 6 号 p. 1055-1059
発行日: 1986/06/25
公開日: 2008/02/29
ジャーナル フリーThe rhoological properties of fish meats heated to temperature above 100°C have been examined. The sample meats were obtained from bigeye tuna and halibut. The rupture strength increased up to 100°C, but decreased after that temperature. Although the elastic modulus and viscosities also increased up to 100°C, they showed constant value after that temperature. The increase of these rheological parameters up to 100°C were attributed to the hardening of the meats which accompanied syneresis. The decrease of the rupture strength above 100°C may come from the weakening of the meat structure. But the stress-relaxation experiments could not detect the results, since the experiment did not accompany the breaking sammple.抄録全体を表示PDF形式でダウンロード (309K) -
Md. Kamal, 元広 輝重, 板倉 隆夫1986 年 52 巻 6 号 p. 1061-1064
発行日: 1986/06/25
公開日: 2008/02/29
ジャーナル フリーThe antifungal properties of salmine sulfate were tested against 15 strains of molds by determining sensitivity, minimum inhibitory concentration and percent growth inhibition. Out of 15 strains 10 organisms were found to be sensitive to salmine sulfate at a concentration of 500μg per ml medium. The salmine sulfate did not support the growth of mucor species at a concentration of 500μg per ml. The genous Rhizopus was also found sensitive to salmine sulfate. The MIC of the tested molds showed that Eurotium repens and Myceliophthora lutea were most sensitive with 250μg salmine per ml medium. These two species were also lowest in percent growth inhibition of 400μg salmine per ml broth medium. All cultures except Aspergillus niger showed reduction of mycelial weight indicating an inhibitory effect of salmine sulfate on the growth of molds. The growth of Aspergillus niger was not inhibited by salmine sulfate.抄録全体を表示PDF形式でダウンロード (269K) -
銭 重均, 宮沢 啓輔, 野口 玉雄, 成田 弘子, 松原 荘六郎, 奈良 正人, 伊藤 啓二, 橋本 周久1986 年 52 巻 6 号 p. 1065-1069
発行日: 1986/06/25
公開日: 2008/02/29
ジャーナル フリーAssays were made of the paralytic toxicity of marine flatworms. Several hundred specimens of unidentified flatworms, which were classified into “type A” (larger and round) and “type B” (smaller and ellipsoidal) for convenience, were collected from Miura and Izu Peninsulas and the Seto Inland Sea and assayed for toxicity by the official method for tetrodotoxin.
Mast of the “type A” specimens assayed were moderately to highly toxic irrespective of the place of collection, the highest toxicity being 1800 MU/g whole body. Some seasonal variation in toxicity was recognized in this type of flatworm. In contrast, most of the “type B” specimens were found to be nontoxic, except for some specimens which showed a toxicity up to 914 MU/g whole body.抄録全体を表示PDF形式でダウンロード (300K) -
尾形 博, 村井 武四, 平沢 康弘1986 年 52 巻 6 号 p. 1071-1075
発行日: 1986/06/25
公開日: 2008/02/29
ジャーナル フリーPDF形式でダウンロード (386K) -
飯田 遙, 中村 弘二, 徳永 俊夫1986 年 52 巻 6 号 p. 1077-1080
発行日: 1986/06/25
公開日: 2008/02/29
ジャーナル フリーDried layer Porphyra yezoensis was stored at 5°C and 30°C for 18 months on the purpose to observe the deterioration of color and the change of volatile sulfur concentrations during storage.
In case of storage at 30°C, deteriorations of color and luster of dried laver were observed after 3 months. Along with the color deterioration, the amount of dimethyl sulfide (DMS) decreased, and that of methyl mercaptan (MM) increased in dried laver. But, in case of storage at 5°C, changes in color, luster and DMS and MM contents in dried laver were not remarkable through a year, though increase of MM was observed after 14 months.
Dimethy1-β-propiothetin as a precursor of DMS in dried laver decreased when stored at 30°C, but when stored at 5°C, the decrease was a little. Concentration of methyl methionine sulfonium salt as one of a precursor of DMS was not change remarkably during storage at 30°C and 5°C.抄録全体を表示PDF形式でダウンロード (311K) -
生田 國雄, 中原 元和1986 年 52 巻 6 号 p. 1081-1087
発行日: 1986/06/25
公開日: 2008/02/29
ジャーナル フリーDistribution of54 Mn in female and male tissues of black abalones was examined at the prespawning stage, and compared with that of stable-Mn. The ripeness of gonads was somewhat lower than fully developed condition, but a number of matured ovum and spermatozoon existed in the gonads. Distribution rates of 54Mn to conch were much less than those of stable-Mn and equal to both sexes; whereas in stable-Mn, the rate of the male is significantly higher than that of the female. It is inferred that two or more inner layer with organic matrices of conch were inactive to receive 54Mn, and that the radioactivity of conch resulted from the adsorption of 54Mn on its outermost rough surface mainly composed of conchiolin. The difference of the absolute amount percents for conchs between 54Mn and stable-Mn could be reasonably explained as the difference between exposure durations to the nuclides. When exposed to 54Mn, only in gonad, the intersexual difference was recognized with higher level in the ovary than in the spermary.抄録全体を表示PDF形式でダウンロード (523K) -
生田 國雄, 中原 元和1986 年 52 巻 6 号 p. 1089-1094
発行日: 1986/06/25
公開日: 2008/02/29
ジャーナル フリーImmediately after spawning had occurred in the eazly stage of exposure experiment, the female individuals exposed to 54Mn concentrated more actively the nuclide than the males, and retained it in whole bodies at 1.70 times higher compared to the males in 100%-SW. Moreover, the biological half-life estimated from the excretion formula was 1.58 times longer in the females than in the males, i.e.54Mn in the females was eliminated more gradually than that in the males. These results differed clearly from those obtained on H. discus at the pre-spawning stage and furthermore, from stable-Mn distribution observed in females and males of Mytilus edulis at the post-spawning season presented previously elsewhere.
54Mn distributed to various soft tissues in the females were apparently higher than those in the males at the end of the exposure in 100%-SW. The concentration factor for ovary of specimens in 100%-SW raised up to 990 at the end of the exposure, while that of sperrnary was only 146. The difference between that for thc ovary and the spermary was of the highest value among tissues, and consequently a skmilar correlationship existed in absolute arnounts and concentrations. The distribution of 54Mn to ovary exhibited skmilar trend at the pre- and the post-spawning stages, but its degree differed from each other and was enhanced in concentration at the latter stage.
The nuclide uptake, retention and excretion by the females were inhibited under depressed spccific gravity condition, whereas the males were not affected at all.抄録全体を表示PDF形式でダウンロード (482K) -
小泉 千秋, 高田 誠, 大島 敏明, 和田 俊1986 年 52 巻 6 号 p. 1095-1102
発行日: 1986/06/25
公開日: 2008/02/29
ジャーナル フリーMinced meats of bigeye tune Thunnus obesus and halibut Hippoglossus stenolepis were vacuum-packed in retortable pouches to give about 8mm in thickness and subjected to thermal processing at F values of 8, 12, and 21 at 115°C and 124°C. Sablefish Anopoploma fimbria was thermal-processed at 115°C in the same manner.
On heating at 115°C, the contents of phosphatidylcholine (PC) and phosphatidylethanolamine (PE) decreased in both bigeye tuna and halibut meats, being accompanied with formations of lysophosphatidylcholine (LPC) and lysophosphatidylethanolamine (LPE), while the content of free fatty acid (FFA) did not increase. Lipid composition of sablefish remained almost unchanged. On heating at 124°C, however, the contents of LPC and LPE increased in bigeye tuna and halibut meats and that of FFA decreased markedly. In addition, the PC decreased in bigeye tuna and the PE in halibut meat.
On heating at 115°C and 124°C, no appreciable change occurred in fatty acid composition of total lipid, non-polar lipid, polar lipid, PC, and PE in all fish meats examined. Only FFA changed in fatty acid composition; percentage of polyenoic acid decreased with increase in Fvalue.抄録全体を表示PDF形式でダウンロード (568K) -
丹羽 栄二, 森 英樹, 中山 照雄, 浜田 巌1986 年 52 巻 6 号 p. 1103
発行日: 1986/06/25
公開日: 2008/02/29
ジャーナル フリーPDF形式でダウンロード (84K) -
ヌガヴォンチョン ソムスイ, 酒井 清, 隆島 史夫1986 年 52 巻 6 号 p. 1105
発行日: 1986/06/25
公開日: 2008/02/29
ジャーナル フリーPDF形式でダウンロード (109K)
- |<
- <
- 1
- >
- >|