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Volume 34, Issue 1
Displaying 1-10 of 10 articles from this issue
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Sumiko KATO, Masaru MATSUO1983 Volume 34 Issue 1 Pages 3-12
Published: January 20, 1983
Released on J-STAGE: March 10, 2010
JOURNAL FREE ACCESSThe gelatinization process of potato starch was investigated in terms of morphological and mechanical properties. The specimens were prepared as water suspensions, the concentration being 1, 3, and 6%, and they were heated up to indicated temperatures at three different kinds of heating rates, 7.0, 2.3 and 1.2°C/min. The collapse of starch granules was affected by both the original concentration and the heating rate. That is, maltefe cross under polarizing microscope and Hv light scattering pattern disappeared at lower heating temperature as the concentration and the heating rate became lower. Viscosity measured by B-type viscometer was close to a maximum value at the temperature which the degree of swelling of starch granules became maximum. In addition, the Hv light scattering pattern from a single starch granule showed that the four lobes were elongated in the direction perpendicular to long axis of an eTpsoidal particle and the scattering maxima characterizing the radial periodicity of pronounced layer appeared clearly at wide scattering angles.View full abstractDownload PDF (10625K) -
1983 Volume 34 Issue 1 Pages 12
Published: 1983
Released on J-STAGE: March 10, 2010
JOURNAL FREE ACCESSDownload PDF (195K) -
Nobuko TANAKA, Hirosi OKAMURA1983 Volume 34 Issue 1 Pages 13-19
Published: January 20, 1983
Released on J-STAGE: March 10, 2010
JOURNAL FREE ACCESSIn order to explain on the relationship between the a-amylase activity in saliva and food life, the factors affecting possible variation of the α-amylase activity insaliva were studied.
Saliva was collected from all salivary glands and appropriately diluted. Thea-amylase activity was measured by two methods, i.e., Willstatter method and dinitrosalicylic acid method. Its activity was expressed in released maltose mg/ml saliva (37°C, 10 min).
Its activity was measured every hour from rising time untill bedtime for five successive days.
Its activity was low at rising time and varied to a great extent during day time, roughly showing three peaks. Its activity tended to decrease at bedtime, and showed the almost same low value at rising time in the next day as that at rising time of the previous day. Its activity at rising time was measured on 332 normal girl students (19-years-old), the mean value being 271 mg/ml saliva.
From the results of these experiments and the informations through the questionnaire which was carried out at the same time, the higher values of α-amylase activity were detected in those who masticated more times and liked starchy food.View full abstractDownload PDF (1193K) -
Method of Analysing Experimental Values by Fundamental ModelTakashi HIRAMATSU, Akiko KOTANI1983 Volume 34 Issue 1 Pages 20-25
Published: January 20, 1983
Released on J-STAGE: March 10, 2010
JOURNAL FREE ACCESSIn order to obtain the soil detachment rate d and the soil redeposition rate r from experimental values by means of fundamental model described in the previous paper, a theoretical study has been made.
The study has shown that :
1) From experimental curve which shows the relation between the mass of soilon the fabrics x 0 (t) and time t, d and r at time t are obtained as follows.
d=x0' (t) |f (t) /x0 (t) f (t) exp {-f (t) t} +|x0' (t) | [1-exp {-f (t) t}]
r=Lf (t) exp {-f (t) t} /A·x0 (t) f (t) -|x0' (t) |/x0 (t) f (t) exp {-f (t) t} +|x0' (t) | [1-exp {-f (t) t}]
where L, mass of aqueous detergent solution; A, surface area of fabrics;f (t) =1/Δtlogx 0'(t) e x 0' (t+Δt) , Δt is small time.
2) If d, r are respectively considered to be constants, irrespective of time, they are expressed by simpler equations than the above mentioned equations, by means of the mass of soil on the fabrics or the concentration of soil in the aqueous detergent solution.View full abstractDownload PDF (793K) -
Noriko WATANABE1983 Volume 34 Issue 1 Pages 26-33
Published: January 20, 1983
Released on J-STAGE: March 10, 2010
JOURNAL FREE ACCESSThe effects of particle size and ratio of the amount of component particles were examined in the adhesion of spherical particles onto polyester cloths from ethanol dispersion of Fe2O3·H2O-CaCO3 binary mixture.
Two sets of hydrated ferric oxide (Fe2O3 · H2O) and calcium carbonate (CaCO3) spherical particles, having two different diameters (2.5 and 4.5 pm), were prepared by the interfacial reaction method as described in the previous papers.
Adhesion of each particle onto polyester cloths from ethanol dispersion was measured in varying ratios of the components; in the heterodispersed system and as well in the monodispersed system.
It was suggested from the results thus obtained that the adhesion of particles on the cloths was influenced by the interaction between dissimilar particles in dispersion medium.View full abstractDownload PDF (1003K) -
Shigeko NAKANISHI, Fumi MASUKO1983 Volume 34 Issue 1 Pages 34-39
Published: January 20, 1983
Released on J-STAGE: March 10, 2010
JOURNAL FREE ACCESSIt seems probable that the removal of soils from resin finished fabrics occurs simultaneously with the removal of resins during the cleansing process, but the observation for the removal of resin has been ignored so far.
Therefore, a simultaneous observation for the removal of resin and soils was carried out in this study to investigate the effect of resin finish on the detergency of soils together with that of stains on the removal of resins.
The results disclosed a correlation between the above two effects as follows :
1) Water soluble soils became more removable by resin finish with an increase in the removal of resins from resin finished fabrics.
2) The detergency of oily soils was reduced by resin finish and only a little removal of resin was observed with oily soils on resin finished fabrics.
3) A mixture of hydrophilic and hydrophobic soil as Chinese ink on resin finished fabrics gave a little removal of resins and its detergency was slightly influenced by resin finish.
4) Also dry cleaning showed a tendency that any increase in the removal of resins gave an improved detergency and reduction in detergency showed little removal of resins.View full abstractDownload PDF (913K) -
Shigeki KOBAYASHI, Kazuko YAMAUCHI1983 Volume 34 Issue 1 Pages 40-47
Published: January 20, 1983
Released on J-STAGE: March 10, 2010
JOURNAL FREE ACCESSIn order to make clear the influence of detergents on phosphorous loadings to a large river, quantities of water soluble phosphate in the Nagara river and their seasonal variations were studied.
Results are summarized as follows;
1. Amounts of soluble phosphate transported through the Nagara river to Ise Bay varies with seasons. The phosphorus loading is greater from summer to autumn and decreases rapidly towards winter, and reaches a nearly steady state, 350-380 kg/day of phosphorus expressed as P, and the values in winter are only 13-36% of those in summer.
2. In May-September period, 610-690 kg/day of phosphorus as P, over 64% of total loading of phosphorus to the Nagara, sometimes 2, 000 kg/day (over 85%) is loaded to the river by fertilizer and organophosphorus agricultural chemicals in the run off from plowlands in the catchment area of the Nagara river system but phosphorus loading by detergents is less than 8.4-9.4% of total phosphorus loadings.
3. In the Nagara, the amount of phosphorus supplied from effluents of the sewage disposal plants is more than twice the amount from laundry waste water.View full abstractDownload PDF (1304K) -
Food Hygienic Studies on Asazuke on the Market (Part 1)Takeshi SUMINO, Kuniko SAKUMA, Yaoko KOGURE, Youhei YANAGISAWA1983 Volume 34 Issue 1 Pages 48-52
Published: January 20, 1983
Released on J-STAGE: March 10, 2010
JOURNAL FREE ACCESS -
Effects of the Speed of Heating on the Quality of Custard Pudding (Part 2)Shizuko FUSE1983 Volume 34 Issue 1 Pages 53-57
Published: January 20, 1983
Released on J-STAGE: March 10, 2010
JOURNAL FREE ACCESS -
Tadaaki KISHIDA, Takashi HAMANO, Yukimasa MITSUHASHI, Naoko HIRAMATSU, ...1983 Volume 34 Issue 1 Pages 58-61
Published: January 20, 1983
Released on J-STAGE: March 10, 2010
JOURNAL FREE ACCESS
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