巻号一覧
50 巻, 11 号
選択された号の論文の29件中1～29を表示しています
- |<
- <
- 1
- >
- >|
-
虫明 敬一, 室賀 清邦, 中井 敏博1984 年 50 巻 11 号 p. 1797-1801
発行日: 1984年
公開日: 2008/02/29
ジャーナル フリーThe 24, 48, 96h and 14 d-TLm (median tolerance limit) values of copper to Japanese eel Anguilla japonica in extremely soft water at 25C°C were 750, 550, 510 and 340 μg-Cu/ι, respectively. Japanese eels were exposed to sublethal concentrations of copper (100 and 250 μg-Cu/ι)and challenged with Edwardsiella tarda, Pseudomonas anguilliseptica and Vibrio anguillarum. Copper exposure resulted in an increase in the susceptibility of eels to E. tarda and P. anguilliseptica, but not to V. anguillarum. When the eels were exposed to copper for 24 or 48 h, the effect was manifested most strongly, but reduced in the eels exposed for 96h. From the fact that corticosteroids admministration also enhanced the susceptibility of eels to the pathogens, it was deduced that increased susceptibility was a result of stress response to copper.抄録全体を表示PDF形式でダウンロード (356K) -
高橋 さち子, 日高 敏隆1984 年 50 巻 11 号 p. 1803-1809
発行日: 1984年
公開日: 2008/02/29
ジャーナル フリーTo know the life of Isaza Chaenogobius isaza in larval stage, observations at the spawning grounds, attempts of raising larvae and offshore towing survey were carried out. Only the yolksac larvae just after hatching were found at the spawning ground. Observations on varous spawning grounds did not show the presence of definite species of organisms regarded as food for the larvae. The larvae kept in aquaria did not feed on organisms collected at spawning grounds. On the other hand, six Isaza larvae in the process of developing fin rays (6.1-10.7mm SL) were caught by offshore towing. These larvae fed exclusively on Eodiaptomus japonicus which is distributed offshore despite the amount of E.japonicus was smaller than that of other zooplankters. From all these facts and that the newly hatched yolk-sac larvae in an aquarium have been observed to swim up vertically to the surface of water, the yolk-sac larvae hatching out at the spawning ground were assumed to swim up to the water surfae immediately and to be carried offshore drifted by water current. Isaza larvae apper to distinguish and choose E.japonicus from the others.抄録全体を表示PDF形式でダウンロード (522K) -
松岡 正信1984 年 50 巻 11 号 p. 1811-1816
発行日: 1984年
公開日: 2008/02/29
ジャーナル フリーA morphometric study of white, red and pink fiber types of myotomal musculature in the red sea bream was carried out from newly hatched larvae to juveniles. Plots of the total length on log/log co-ordinates were divided into three stanzas delimited by two inflections, respectively. In the case of pink fibers, plots of those morphometric measurements were divided into two stanzas delimied by one inflection. Almost all first inflections of white and red fibers occurred around onset of feeding. All second inflections of white and red fibers and inflections of pink fibers occurred between about 6 and 10mm TL. It is suggested that the quantitative changes of myotomal musculature may be correlated with the behavioral changes of swimming in these stages as well as the qualitative changes.抄録全体を表示PDF形式でダウンロード (422K) -
今井 健彦1984 年 50 巻 11 号 p. 1817-1822
発行日: 1984年
公開日: 2008/02/29
ジャーナル フリーThe purpose of this experiment is to obtain the experimental equation concerning the projective area of a twine portion on the knotless twisted netting, as the basic research for the study of the fluid dynamical coefficient at a certain attack arlgle θ, when the netting is set into a flow.
The netting samples used are seven kinds of knotless netting composed of varying twine dimeter d and leg length l. And the respective netting is fixed on the ?? -shaped netting frame at hanging angle of 45°, by thin stainless steel wire, while among sevwn, one netting is fixed at the six stages of hanging angleØ.
Th ?? projective area of the twine portion is obtained from the enlarged photograph, concerning the area measured by a planimeter of one mesh which is made up of two knots and four legsforming two netting elements.
Results obtained are as follows:
(1) The projective area of a twine portion on the (i×j) mesh sample, at the range of attack angle Θ<θ ?? 90° is calculated easily, using the following experimental equation.
Sθ'=4.4ijdlsinδ+(i+j-2.2ij)d2/sin2ε+0.44d2(2.2ij-i+j/2)sin2∅sinθ
(2) The projective area, of a twine portion on the (i×j) mesh netting, at the range of attack angle 0° ?? θ ?? Θ is derived in the following experimental equation.
Sθ'=0.84[j{(2i-1)l2sin2∅sinθ+2dlsinδ}+πd2/4cos∅{1+(i-1)θ/Θ}]
Where,
δ: Angle between the leg and the horizontal plane on the ABC plane
ε: Apparent hanging angle on a projected plane
θ: Attack angle
Θ: Attack angle when the adjacent legs were touched on a projected plane
Sθ': Projective area of the twine portion of the knotless netting at attack angle Θ<θ ?? 90°.
SΘ': Upper described area of the knotless netting at attack angle 0° ?? θ ?? Θ.抄録全体を表示PDF形式でダウンロード (400K) -
今井 健彦1984 年 50 巻 11 号 p. 1823-1828
発行日: 1984年
公開日: 2008/02/29
ジャーナル フリーThe purpose of this experiment is to obtain the experimental equation concerning the projective area of a Weaver's knot-netting as the basic research for the study of fluid dynamical coefficient at any attack angleθ, when the netting is set into a flow.
The netting samples used for the experiments are six kinds of netting of twine diameter d and leg length l. And, in addition to this, hanging angle ∅ is changed at six stages concerning one netting. The projective area is measured the same way as in the case of knotless twisted netting.
Results obtained are as follows:
(1) The projective area of a twine-portion on the (i×j) mesh netting sample, at the range of attack angle Θ∗<θ ?? 90° is derived in the following experimental equation.
S"θ=4ijd(l-3.03d)(0.16dl+0.51)sinδsindθ+6.08d2(2ij+i+j)
(2) The projective area of a twine-portion on the (i×j) mesh netting sample, at the range of attck angle Θ<θ ?? Θ∗ is derived in the following experimental equation.
S"Θ∗=3.68ijd(l-3.03d)/(0.16dl+0.51)sinδsindθ+6.08d2{(1.84ij+i-j-1)(θ/Θ∗)+2j+1}
(3) And concerning the range of attack angle 0° ?? θ ?? Θ, it is possible to represent in the following experimenta equation.
S"Θ=0.88[(2ij-j)l2sin2∅sinθ+2jd(l-3.03d)sinδ+6.08d2{(2j+1)+(i-1)(θ/Θ∗)}]
Where,
Θ∗: Attack angle when the adjacent knots touched each other on a projected plane.
S"θ: Projective area of the twine-portion of the Weaver's knot-netting at the range of attack angle Θ∗<θ ?? 90°.
S"Θ∗: Projective area of the twine-portion of the Weaver's knot-netting at the range of attack angle Θ<θ ?? Θ∗.
S"θ Projective area of twine-portion of the Weaver's knot-netting at the range of attack angle 0° ?? θ ?? Θ.抄録全体を表示PDF形式でダウンロード (350K) -
阪本 俊雄1984 年 50 巻 11 号 p. 1829-1834
発行日: 1984年
公開日: 2008/02/29
ジャーナル フリーBased on the scale reading, the relationship between age and growth of the red sea bream Pagrus major in the waters of the southern part of Wakayama Prefecture was studied. The ringmarks on scales are generally obscure in comparison with those in the Inland Seas, and it was almost imposible to read scales from about 7.5% of the whole. The periods of ring formation and spawning are from about March to April. The growth laws in length (L, mm) and weight (W, g) are estimated as follows:
Lt=670[1-exp{-0.211(t+0.079)}], W=0.00001994L3
While, anabolism and catabolism have been calculated from growth parameters given above. The biggest value of the daily growth of weight is 1.53g. at the age of 5. This growth is pretty bigger than that described in former studies which have treated the same species in other Japanese coastal waters. This fish hibernates in watcr of 12°C and below, Therefore, it is reasonable that the geographical variations of the growth and ring formation come from the temperature difference and reflects the metabolism difference of the fish in each water.抄録全体を表示PDF形式でダウンロード (376K) -
阪本 俊雄1984 年 50 巻 11 号 p. 1835-1842
発行日: 1984年
公開日: 2008/02/29
ジャーナル フリーIn order to clarify the distribution and migration of red sea bream in the waters of southern part of the Kii Strait, 994 tagged fish about 150-750mm in fork length, caught by line boats, were released in the Shirahama coastal waters in 1981.
Many tagged fish were recaptured durning the 1st year just after liberation, but after that ercaptures decreased suddenly. 177 of them were recaptured by the end of May, 1983, and the rate of total recapture was about 18%. About90% of the total recapture were made in the waters between Hinomisaki and Ichiesaki which is located near the liberation points. The rest 10% were recaptured at other fishing grounds, wandered out of the above mentioned area. Analysing these recapture data, the red sea bream subpopulation in the waters of the southern part of Wakayama Prefecture, ajacent to the Kii Strait, was confirmed, And it was clarified that the effective period of the Atokins disk tag used seems to be about 1-year, and that these recovery data, which have few miss reports of recapture, are available for the estimation of exploitation rate, and so on.抄録全体を表示PDF形式でダウンロード (485K) -
木村 清志1984 年 50 巻 11 号 p. 1843-1847
発行日: 1984年
公開日: 2008/02/29
ジャーナル フリーThe present report deals with the age and growth of threeline grunt Parapristipoma trilineatum (Pisces: Perciformes: Haemulidae) examined by otolith reading, based on 885 individuals taken from coastal areas of Kumanoa-nada (Kii Peninsula, central Japan) from March 1981 to July 1983.
The otolith was failry large and was removed very easily from cranium. Hyaline and opaque zones were shown clearly without grinding nor sectioning. The otolith was more suitable for age determination of the fish than scale because ring marks were shown distinctly even for older specimens, and lack or duplication of ring marks were very few. Examination of marginal increment of otolith showed that the ring marks (outer margins of opanque zones) formed once a year in the spawning season (June and July). Range of length growth was estimated by mean values and standard deviations of calculated fork lengths at the time of each ring formation. As a result, average growth was expressed by the following equation as Lt=357.5(1-exp(-0.2855(t+0.2909))) and the growth for about 95% of the fish was within the limits of two equations as Lt=362.1(1-exp(-0.3377(t+0.3622))) and Lt=355.8(1-exp(-02427(t+0.1283)) (L, fork length in mm; t full age).抄録全体を表示PDF形式でダウンロード (1534K) -
由木 雄一1984 年 50 巻 11 号 p. 1849-1854
発行日: 1984年
公開日: 2008/02/29
ジャーナル フリーThe Purpose of the present paper is to report the study on the age and growth of a Sterno optychid Fish Maurolicus muelleri in the south western waters of the Sea of Japan. A total of 1823 samples were collected by midwater trawl, and the otolith of 258 specimens out of them were used for the age determination. The results through this investigation are summarized as follows.
1. The relationship between standard length (L mm) and the radius of otolith (R mm) can be described by the following equation.
R=0.1204+0.0128L
All the radii of annual marks on otolith were standardized by this equation.
2. By monthly change of marginal growth of otolith, it was estimated that the annual mark (hyaline zone) was formed every year through the long period from December to April.
3. Fish was classified into two groups; spring brood and autumn brood, by the size of radius of annual mark on otolith. That is to say, one whose radius of the inner opaque zone was over 0.584mm was put into spring brood and one with the value less than this figure into autumn brood.
4. It may be estimated that the two groups, both spring brood and autumn brood, atain sexual maturity in about a year and the lifetime si around 20 months.
5. The relationship between the number of months (t) and the standard length (L mm) is estimated as follows.
Spring brood: Lt=56.1(1-e-0.119(t-0.315))
Autumn brood; Lt=56.3(1-e-0.08(t+3.005))
Female is larger than male in both groups.抄録全体を表示PDF形式でダウンロード (887K) -
今林 博道, 佃 信丈1984 年 50 巻 11 号 p. 1855-1862
発行日: 1984年
公開日: 2008/02/29
ジャーナル フリーThe settlement and growth processes of the small semelid bivalve Theora lubrica were quantitatively investigated in the northern shallow waters of Bingo-Nada, the Seto Inland Sea, based on the seasonal fluctuations in density and size composition from April 1982 to April 1983.
This bivalve, inhabiting predominantly in muddy sediments, seemed to migrate gradually to the offshore soft-muddy areas with increased age, where the largest individual with a shell-length of 15.6mm was found. Settled individuals were abundant during the spring and early summer, and thereafter decreased rapidly simultaneously with the rise of sediment temperature and the depletion of dissolved oxygen. These fluctuations in the population density were due mainly to both the settlement of planktonic larvae and the migration and/or mortality of settled benthic adults.
The linear growth rate for the cohort with the highest settlement abundance was calculated at 0.12mm/day over a range of 2.2mm to 8.3mm in shell-length during the spring and summer, which would be comparable to that of the first-recovering settled cohort in fall.抄録全体を表示PDF形式でダウンロード (568K) -
李 鐘〓, 藤本 健四郎, 金田 尚志1984 年 50 巻 11 号 p. 1863-1868
発行日: 1984年
公開日: 2008/02/29
ジャーナル フリーThe peroxide-decomposing activity of Antarctic krill Euphausia superba lipid was studied. Chromatographic analysis by silicic acid showed that krill phospholipids are mainly composed of phosphatidyl choline (PC) with phosphatidyl ethanolamine, lysoPC and oxygenated polar materials. All chromatographic fractions showed varying activity in the decomposition of methyl linoleate hydroperoxides. In order to elucidate the mechanism of peroxide degradation, the tion, partial hydrolysis and oxidation for different periods of time. With hydrogenation, peroxidedecomposing activity was lost and the browning of PC was inhibited as well, With the progress of oxidation, both the peroxide-decomposing activity and the browning of PC were enhandced. Hydrolysis of any part of PC decreased the peroxide-decomposing activity. These results suggest that oxidative degradation is necessary for phospholipids to show peroxide-decomposing activity.抄録全体を表示PDF形式でダウンロード (407K) -
佐藤 繁雄, 土屋 隆英, 松本 重一郎1984 年 50 巻 11 号 p. 1869-1876
発行日: 1984年
公開日: 2008/02/29
ジャーナル フリーFor examing the factors involved in the elastic quality of kamabokos, the microstructures of the texture were examined by electron microscopy.The obtained microstructures were evaluated in correlation with the jelly strength values of the kamabokos. Some kamabokos were picked up at shops and others were prepared from frozen surimi of Alaska pollack, The electron micrographs demonstrated a variety of microstructure profiles and these were roghly classified into fivetypes: (1) a matrix with distinct network structures, similar to those of MIYAKE et al. (1971), (2) a matrix of randomly dispersed bundles of irregularly arranged filaments, but similar to (1), (3) a matrix with the Z-bands remaining, (4) a matrix including myofibrils remaining, and (5) a matrix including collagen-like objects. Matrix of the second type was found most frequently. In the same piece of kamaboko, some portions consisted of densely dispersed matter and other portions of loosely dispersed matter. In the latter portions, matrix of the first type was usually found. Some correlation was found between the microstructure profiles and jelly strength. Comparison of the kamabokos prepared from frozen surimi of various grades illustrated that the microstructure and the jelly strength of kamabokos vary depending on the myofibrillar structures and the state of the proteins in the surimi.抄録全体を表示PDF形式でダウンロード (5752K) -
熊谷 昌士1984 年 50 巻 11 号 p. 1877-1881
発行日: 1984年
公開日: 2008/02/29
ジャーナル フリーA simple and rapid analytical procedure was investigated for determination of iflouride in Antarctic Krill Euphursia superba. An ionselective electrode method was adopted to simplify and make rapid the procedure. The fluoride content in krill was obtained by measuring the concentration of fluoride of the extrabled solution with an ion meter. For extraction of fluoride, 0.05 N HCLO4 solution was the most suitable. The most satisfactory results were obtained by using 100 ml of acid and shaking for 45-60 minutes on 1-2g of sample. The presence of cations, anions, and protein of ordinary cotents did not interfere. Recoveries of fluoride on eighteen samples were 90-100% and coefficient of variation was 3.34%. Fluoride contents in krill were 470-510 ppm and C. V. was 2.12% by this proposed method.抄録全体を表示PDF形式でダウンロード (349K) -
鎌谷 明善, 捧 一夫, 森田 良美1984 年 50 巻 11 号 p. 1883-1888
発行日: 1984年
公開日: 2008/02/29
ジャーナル フリーThe procedure consisting of successive extractions with 0.5N HCI and 0.05N NaOH at room temperature and 0.05N NaOH at 90°C was applied for studying the phosphorus in the core samples from Tokyo Bay.
Most (77-88%) of the phosphorus was extracted from the sediments using the procedure throughout the core. The fraction extracted with 0.5N HCI was composed of inorganic phosphorus exclusively, ranging from 38 to 67% of the total phosphorus in the combined extracts. The alkaline extractable fraction was composed of organic-and inorganic-phosphorus in nearly same ratio. The cores analyzed in this study showed a decrease in phosphorus with sedlment depth.
In an approach, the mineralization rates of organic matter in the sediments were estimated from the vertical profiles of organic carbon and phosphorus. The rate constants for phosphorus lay between 1.6 ?? 2.6×10-2 yr-1, which were about two oredrs of magnitude lower than those of a mixture of zoo-and phyto-plankton collected from overlying waters. From this, it was concluded that almost all of the easily accessible and metabolizable organic phosphorus (>90%) is miner-alized in a water column and in the water-sediment interface before burial, and that only a small fraction remaining as refractory organic matter goes on decomposing gradually in the sediments for a long time.抄録全体を表示PDF形式でダウンロード (498K) -
神谷 慎一, 今野 久仁彦1984 年 50 巻 11 号 p. 1889-1896
発行日: 1984年
公開日: 2008/02/29
ジャーナル フリーH-meromyosin (NMM) and subfragment-1 (S-1) were prepared from squid myosin by digestion with trypsin, chymotrypsin or papain. The chymotryptic and papain HMM and S-1 maintained intact regulatory light chain (R-LC), whereas R-LC in tryptic HMM and S-1 was slightly degraded. As far as pH, KCI and temperature dependencies of Ca-, EDTA-, and Mg-ATPase activities are concerned, these HMM and S-1 preparations were virtually identical with native squid myosin. Squid HMM AND S-1 showed a significant difference in Ca-sensitivity; the Mg-ATPase activity of S-1 was insensitive to Ca, whereas the activity of HMM was very sensitive. Furthermore, the addition of F-actin to HMM and S-1 did not change the Ca-sensitivity of Mg-ATPase. Double reciprocal plots of the actin-activated Mg-ATPase against free actin concentration indicated that the affinity of HMM to actin is unaffected by Ca by the maximal activity is distinctly increased by Ca. On the other hand, both the affinity of S-1 to actin and the maximal activity of acto-S-1 were unaffected by Ca. These results confirmed that the primary role of RLC is to inhibit Mg-ATPase activity of myosin and not to inhibit actin-myosin binding. R-LC is supposed to lose biological functions when S-1 is derived from squid myosin.抄録全体を表示PDF形式でダウンロード (2337K) -
山口 邦子, 豊水 正道1984 年 50 巻 11 号 p. 1897-1903
発行日: 1984年
公開日: 2008/02/29
ジャーナル フリーIn the previous paper, the authors pointed out that lipid oxidation was depressed in the ordinary muscle during storage of fish (in the round) and that the stability of lipids correlated with their contents of phospholipid (PL). The present paper deals with the participation of PL in the ordinary muscle of learn fish in lipid oxidation.
Lipids from the ordinary muscle of plaice were separated into three fractions (Frs. I, II and III) by gel chromatography on Bio-Beads S-X2 wiht benzene as an eluting solvent. PL(Fr. I) was well separated from the remaining lipids. Antioxygenic action of each faction on methyl linolenate (MLn) was estimated by the measurment of residual MLn during incubation of the systmet at 40°C for 5 days in which each fraction was added to MLn. Inhibition of MLn oxidation was not observed by the addition of Fr. I but by that of whole lipid or Fr. III. Andioxidant in Fr. III was indentifiled as a-tocopherol (a-Toc) by thin layer chromatography using β-carotene-linoleate and Emmerie-Engel reagents as detectors. Addition of PL to the mixture of MLn and a-Toc prolonged induction period of MLn oxidation remarkably. The more PL added to the mixutre, the higher stability of MLn was obtained. The authors concluded that PL plays an important role on lipid oxidation in the ordinary muscle during cold storage of fish as a synergist for antioxygenic action of a-Toc.抄録全体を表示PDF形式でダウンロード (447K) -
山口 邦子, 豊水 正道1984 年 50 巻 11 号 p. 1905-1908
発行日: 1984年
公開日: 2008/02/29
ジャーナル フリーAs one of the causes for which lipid oxidation proceeded preferentially in the skin during cold storage of fish in the round, it was supposed that lipids in the skin, buried in the connective tissue of skin, move to the surface from the inner layer by the disintegration of connective tissue and that the fact brings about acceleration of lipid oxidation during storage of fish.
The acceleration of lipied oxidation was examined by the degradation of connective tissue in the skin with glycosidase and proteinase. By the incubation of the skin of Pacific mackerel with hyaluroniodase at 37°C for 2 h or with Pronase P at 37°C for 2 h after the preincubation at 70°C for 10 min, the value of TBA/kg skin increased with reference to control. After the incubation of the skins of four kinds of fish (Pacific mackerel, sardine, striped pigfish and plaice)with both enzymes, acceleration of liped oxidation was observed in every skin. Increasing rates of lipid oxidation in all the skins were almost the same with hyaluronidase and Pronase P. Among these fishes; increasing rate was the hightest in the skin of plaice, which was the lowest in lipid content.抄録全体を表示PDF形式でダウンロード (290K) -
仁木 弘, 土肥 達, 五十嵐 清一郎1984 年 50 巻 11 号 p. 1909-1916
発行日: 1984年
公開日: 2008/02/29
ジャーナル フリーWhen the active fish protein powder (AFPP) is produced commercially, one of the most important requirement is maintaining constant quality of AFPP throughout the year.
In order to know the variation of qualities of AFPP and raw fish meat; AFPP was made to check the quality at intervals of one month.The qualities of raw fish meat and AFPP were determined by ATPase activity and kamaboko-forming properties, and the freshness of raw fish (Alaska pollack)was estimated by K-value.
From the results the quality of AFPP changed seasonally, namely, AFPP made in autumn and winter had relatively higher quality than that made in spring and summer.
This seasonal variation was due to the property and freshness of raw fish meat. But the method to determine exactly the variation of quality in raw fish meat not found.
As a method to detemine the quality of AFPP, the bending test of kamaboko was index for seasonal variation of AFPP. On the other hand, ATPase activity of AFPP was not due to seasonal variation but the temperature of spray drying.抄録全体を表示PDF形式でダウンロード (615K) -
仁木 弘, 出家 栄記, 五十嵐 清一郎1984 年 50 巻 11 号 p. 1917-1924
発行日: 1984年
公開日: 2008/02/29
ジャーナル フリーThe examination to check the suitability of Peruvian hake meat as raw meterial to make the active fish protein powder(AFPP)was done. And it was found that Peruvian hake meat is lacking in kamaboko-forming ability which is an essential condition for raw material of AFPP.
Many Myxosporidian parasites were observed in the muscle of Peruvian hake and a protease activity was found in the homogenized muscle. The maximum activity of the protease was at 50-60°C and Peruvian hake meat changed for mushy texture by cooking through this range of temperature.
The protease activity was found in the water soluble fraction of Peruvian hake muscle. When the water soluble fraction was added, the normal Alaska pollack meat decreased extremely in its kamaboko-forming ability.
The protease fraction isolated from the water soluble fraction digested the actomyosin of peruvian hake. From these results, it was suggested that a lack of kamaboko-forming property of Peruvian hake meat is caused by the protease in its water soluble fraction. The protease was not denatured by spray drying in producing AFPP. It was judged that Peruvian hake meat is not suitable as raw material of AFPP.抄録全体を表示PDF形式でダウンロード (1634K) -
荒木 繁, 小川 廣男, 大房 剛, 鹿山 光, 村田 紀夫1984 年 50 巻 11 号 p. 1925-1928
発行日: 1984年
公開日: 2008/02/29
ジャーナル フリーChlorophyll a and its derivatives extracted from the dried laver, “Nori”, Porphra yezoensis, which had been stored under high humidity conditions, were separated in a short time by anion exchange column chromatography with DEAE-T0YOPEARL 650 M. Fractions successively eluted with acetone, acetone/H2O (99:1, v/v), acetone/H2O/CH3COONH4 (98:2:0.1, v/v/w) and acetone/H2O/CH3COONH4 (95:5:0.2v/v/w), contained, respectively, pheophytin a plus carotenoids, chlorophyll a, pheophorbide a, and chloroghilliide a. The pigments in the fractions were quantitatively determined by spectrophotometric method. The results suggest that this chromatographic menthod is effective in determination of chlorophyll a its derivatives in fresh as well as stored alagal thalli.抄録全体を表示PDF形式でダウンロード (283K) -
平石 明, 北村 博1984 年 50 巻 11 号 p. 1929-1937
発行日: 1984年
公開日: 2008/02/29
ジャーナル フリーPurple nonsulfur bacteria occurred in relatively high numbers (105 to 107 viable cells/ml) in surface waters of ditches, paddy fields, and tide pools under oxygen-limited conditions, whereas they were absent or found in small numbers in eutrophic pond and river waters in which too much oxygen was present. The phototrophic bacteria were recovered from all activated sludeg plants studied, with numbers of 102 to 105 viable cells/mgdry sludge. In general, food industrial wastewater activated sludge samples yielded higher numbers of the photorophic bacteria than did sewage activated sludge samples. These results suggest that the organic nutrient composition of the waste is an important factor controlling the occurrence of these bacteria in activated sludge. The phototrophic bacterial flora of the activated sludge and the other aquatic environments was mainly represented by facultatively aerobic species such as Rhodopseudomonas sphaeroides, Rhodopseudomonas palustris, Rhodopseudomonas gelatinosa, and Rhodopseudomonas capsulata.抄録全体を表示PDF形式でダウンロード (735K) -
オマール シャーバン, 渡部 終五, 落合 芳博, 橋本 周久, 上村 俊一1984 年 50 巻 11 号 p. 1939-1943
発行日: 1984年
公開日: 2008/02/29
ジャーナル フリーTwo salinity levels of “ikura”, a salted product of salmon eggs, were prepared from fresh ovaries of the chum salmon Oncorhynchus keta, divided into many lots, and kept frozen for 11 months ai-10°, -20°, -30°, -40° and -60°C. At one or two-month interuals, a portion of each lot was analyzed for toughenss of egg membrane, carotenoid content, and thiobarbituric acid (TBA) value as parameters for quality change.
The results obtained showed that -10°C is reasonable for a short-term storage (up to 3 months) of ikura of either salinity, whereas -40°C, and not -60°C, was found best for a long-term storage up to 11 months. In addition, non-salted salmon eggs were found to be processed to a high quality ikura even after 11 months of frozen storage. Vacuum packaging was very effective against the lipid oxidation of ikura.抄録全体を表示PDF形式でダウンロード (362K) -
丹羽 栄二, 中山 照雄1984 年 50 巻 11 号 p. 1945-1948
発行日: 1984年
公開日: 2008/02/29
ジャーナル フリーIt has heen known that the protein network structure disperses more finley and honogeneously in the elastic fish flesh gel and the gel strengthened by setting than in the brittle gel. Here, an elastic mocel was assumed in order to clarify the mechanisn of strengthening the gel by the setting. N1 and n2 numbers of spring coil were connected respectively in parallel (n1≥n2, n1 plus n2 equals constant). The paralleled coil of former numbers n1 signified a micro-portion where the protein network structure existed abundantly in the gel, while the other paralleled coil signified the portoion where the structure existed scarcely. Two sets of the paralleled coil signified each other in series. From the assumption that each coil was broken at a limitinf strain, thus obtained compound coil was calculated to be maximum in the breaking strain, strain, breaking stress and elastic modulus at n1=n2.
From these results, it was presumed that the gel was strengtheged by the homogeneous dispersion of protein network strictire induced by the setting.抄録全体を表示PDF形式でダウンロード (292K) -
児玉 正昭, 緒方 武比古1984 年 50 巻 11 号 p. 1949-1951
発行日: 1984年
公開日: 2008/02/29
ジャーナル フリーThe toxicity of the fresh water puffer Tetrodon leiurus was analysed. All the organs examined found to be toxic. Among then, the ovary was the strongest in toxicity, followed by the skin. Other organs were less toxic than the ovary and the skin, but contained considerable amounts of toxin. The liver, one of the most toxic organs in the Japanese species in general, was the weakest in toxicity. The distribution of hthe toxin in this species was similar to that of puffers in the South Seas. The toxin isolated from the ovary was identified as tetrodotoxin. Minor toxic components could not be found.抄録全体を表示PDF形式でダウンロード (208K) -
梶原 忠彦, 片山 真司, 安部 守, 畑中 顕和1984 年 50 巻 11 号 p. 1953
発行日: 1984年
公開日: 2008/02/29
ジャーナル フリーPDF形式でダウンロード (1068K) -
北尾 忠利, 青木 宙, 室賀 清邦1984 年 50 巻 11 号 p. 1955
発行日: 1984年
公開日: 2008/02/29
ジャーナル フリーPDF形式でダウンロード (80K) -
村井 武四, 尾形 博, 竹内 俊郎, 渡辺 武, 能勢 健嗣1984 年 50 巻 11 号 p. 1957
発行日: 1984年
公開日: 2008/02/29
ジャーナル フリーPDF形式でダウンロード (114K) -
岡本 信明, 佐野 徳夫1984 年 50 巻 11 号 p. 1959
発行日: 1984年
公開日: 2008/02/29
ジャーナル フリーPDF形式でダウンロード (82K) -
1984 年 50 巻 11 号 p. 1961
発行日: 1984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 (64K)
- |<
- <
- 1
- >
- >|