The stability of l-ascorbic acid mixed with corn syrup was tested. The preservation of /-ascorbic acid in candies is affected by heavy metal content in corn syrup. About 99.5% of l-ascorbic acid enriched to candies were remained when it was mixed to concentrate cooled to 90°C after removing the pan from the fire.
In spite of an appreciable amount of work in this field, the effects of acidity and alkalinity of diets had been contradictorily reported on the calcium metabolism. A three week long balance study was undertaken on 10 adult men fed acid-and baseforming diets, and the following reseults were obtained. 1) Serum Ca level was almost unchanged during the whole experimental periods. 2) Absorption of Ca from intestine increased significantly in acidic period (60%), and decreased in basic period (40%). 3) Urinary excretion of Ca increased significantly in acidic period (212mg/day), and decreased in basic period (127 mg/day). The urinary out-put was shown to be ruled by the acid-base balance of body fluild as well as the amount of absorption from intestine. 4) Retention of Ca was obtained somewhat more readily on acid-forming diet (232mg/day) than on base-forming diet (181 mg/day).
The author reported previously on the effects of acid and base-foming diets on calcium metabolism. This paper presents the observation on calcium metabolism in acid-base imbalance induced by oral administration of two agents, acetazolamide and sodium bicarbonate. The balance study was performed for 3 weeks, using 9 adult men as experimental subjects. The results are summarized as follows: 1) The supplement of basal diet with acetazolamide, 250 mg/day, resulted in slight metabolic acidosis. while the supplement with sodium bicarbonate, 12 mg/day, in slight metabolic alkalosis. 2) Intake of Ca was maintained at the almost same levels throughout the experiment, 721 mg/day during control period, 716 mg/day during acetazolamide-period, and 724 mg/day in Sodium bicarbonate period. 3) Absorption of Ca from intestine was significantly impaired during acetazolamideperiod, 47%, comparing during control period, 60%. Absorption during sod. bicarb-period, 52%, was better than during acetazolamide-period but less than during control period. 4) Urinary excretions of Ca were 192 mg/day in control period, 232 mg/day on acetazolamide-period, and 180 mg/day in sod. bicarb. period. The ratios of urinary excretion to absorption were respectively 45%, 69%, and 47%, indicating that calcium was most readily excreted in acetazolamide-period. 5) Retentions of Ca were of the same degree during control period, 238 mg/day, and sod. bicarb.-period, 200 mg/day, but reduced to the great extent during acetazolamide-period 104 mg/day, due to decreased absorption and increased urinary excretion.
Food yeast was suspended to 10 folds of water, boiled, and then the suspension was centrifuged. This supernatant or this yeast itself was added to the material of ‘miso’(fermented soybean paste). The ratio of yeast to total material of ‘miso’ was about 5.6%. The taste and the odour of this yeast added ‘miso’ was found to be superior to those of the control (‘miso’ without yeast). Rats administered with the diet composed of rice powder (87%), fats (5.0%), yeast ‘miso’(5.0%), salts (3.0%), and liver oil (1 drop) grew better than those administered the diet of control ‘miso’ instead of yeast ‘miso’ of the former group, and the feed efficiency increased about 3% by this. The yeast ‘miso’ was not only superior on its nitrogenous matter but also on its thiamine contents.
One variety of barley and two of naked barley collected from several prefectures of Japan were analyzed on their phytic acid content by the McCance's method, in which the author adopted the colorimetric determination of phosphorus by Gomori. The phytic acid contents of pressed barley produced in various parts of Japan were also determined.Their values were very small, and almost the same as the values of polished rice.
Three varieties of wheat produced in various parts of Japan, several brands of wheat flour made in two of the largest milling factories in Japan and several samples of bread made in Sendai and Tokyo were analyzed on their phytic acid content.The values of wheat flour were fairly different among different brands. The phytic acid contents of buckwheat and several kinds of noodle were also analyzed, indicating considerably high values.
Albino rats were fed on a basal diet composed of yellow corn meal, gluten powder, salt mixture, and vitamin mixture.When L-or DL-lysine was supplimented to the basal diet, the growth of the animals was markedly stimulated and the blood hemoglobin level was raised to normal value.Growth of bone tissue was also improved decidedly. D-Lysine was also effective, althogh in less extent. This might be due to that the D-amino acid preparation contained L-form remaining unremoved.Excessive addition of L-lysine to the basal diet gave no harmful effect to the animals.
Polished rice powder with addition of salt mixture and vitamin mixture was used as the basal diet.Supplimentation with tryptophane and or lysine did not improve the growth of rats. When DL-threonin was added to the basal diet with L-lysine the growth of the animals was conspicuously stimulated. There was no detectable difference in blood hemoglobin levels among the animal groups fed on the different diets. Growth experiments with various amounts of added threonine to the basal diet supplimented with lysine revealed that addition of as little as 0.025% threonine stimulated the growth distinctly.
The authors reported previously that thiamine decomposing, thermostable factor was isolated from peanut seed coat and that this was found as tannin which was contained in materials. In this paper we determined the tannin contents of various daily-used foods, and demonstrated that the tannin in foods caused the decrease in thiamine content during heat treatment. Further studies showed that precipitate was produced in solution of thiamine and tannin mixture when hydrogen ion concentration was brought at higher pH than 5. And two spots of thiamine and tannin was detected when the precipitate was run by paper electrophoresis.