Aconiti tuber butanol fraction, which is isolated from the chloroform insoluble and water soluble extract of Aconitum volubile, has been recently known to have a potent positive inotropic effect in the isolated cardiac muscle preparations of various animals. The positive inotropic mechanism of Aconiti tuber butanol fraction, in relation with the external calcium, was studied using the isolated cat papillary muscle. The positive inotropic effect was dependent on the calcium concentration in the nutrient medium, and a synergistic relation could be demonstrated between Aconiti tuber butanol fraction and the external calcium. The inotropic effect of $10^{-4}g/ml$ of Aconiti tuber butanol fraction was equivalent to that of 0.06mM of calcium in the medium. After the treatment with a calcium influx inhibitor, Verapamil$(2{\pm}10^{-7}-10^{-6}M)$, the contractile force of the papillary muscle was markedly inhibited. In these preparations, Aconiti tuber butanol fraction restored the decreased contractility in a dose-dependent manner. It was suggested that the positive inotropic effect of Aconiti tuber butanol fraction might be related with the stimulating action on the calcium influx through the slow inward calcium channels in the cardiac cell membrane. In contrast with digitalis cardiac glycoside, Aconiti tuber butanol fraction infused intravenously into the anesthetized rabbit decreased the systemic arterial blood pressure and increased the carotid blood flow, but produced no prominent changes in the heart rate.
The objective of this study was to investigate the effects of an enriched diet supplemented with aqueous fibrolytic enzyme products (FEP) on In vitro fermentation and growth performance of Hanwoo Steers. Total mixed ration combined with fibrolytic enzyme products showed a slight increase in the pH level on In vitro fermentation. Acetate ratio in volatile fatty acids, and the concentration of total volatile fatty acids were significantly greater at 12hr and 24hr after cultivation (p<0.05). Dry matter digestibility was significantly increased in groups supplied with aqueous fibrolytic enzyme products at 24hr after cultivation (p<0.05). In a rearing trial, the average daily gain and feed efficiency improved in the treatment groups supplied with aqueous fibrolytic enzyme products. Nutrient digestibility such as DM, crude fiber, NDF, and ADF digestibility were also significantly increased with the addition of aqueous fibrolytic enzyme products (p<0.05). Therefore, the aqueous fibrolytic enzyme products supplementation on In vitro fermentation is effective in improving the condition of rumainal fermantation. Also two kinds of aqueous fibrolytic enzyme products were found to be effective in improving the average daily gain and feed efficiency in Hanwoo Steers.
Two experiments were conducted to compare the effects of different organic acids on growth performance and apparent nutrients digestibility in weaned pigs. In both the experiments, 180 pigs were assigned to four treatments with three replicates comprising of 15 pigs in each. Formic acid, ammonium-formate, lactic acid, and acid mixture were added to diets at 0.50% (Exp. 1) and 0.30% (Exp. 2) as dietary treatments for 5 and 6 wk feeding trial, respectively. The acid mixture was prepared by mixing formic acid and lactic acid at 50:50 ratios. To investigate the apparent ileal amino acids digestibility, twelve pigs (3 per treatment) were used and fitted with simple ileo-caecal T-cannula for both experiments. In Exp.1, growth performance was comparable (P>0.05) among pigs fed different organic acids, while acid mixture had higher (P<0.05) weight gain than that of lactic acid in Exp.2. The apparent ileal digestibility of amino acids was highest (P<0.05) in pigs fed acid mixture and lowest (P<0.05) in pigs fed formic acid diets in both experiments. These results indicated that supplementation with acid mixture (formic acid and lactic acid) improved performance and ileal amino acid digestibility in weaned pigs.
Kim, Eunjoo;Wickramasuriya, Samiru Sudharaka;Shin, Taeg Kyun;Cho, Hyun Min;Kim, Hyeun Bum;Heo, Jung Min
Journal of Animal Science and Technology
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v.62
no.4
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pp.521-532
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2020
The production performance of broiler breeder hens in response to different levels of total lysine during the early laying period was investigated. A total of 126 Ross 308 parent stock hens were offered one of seven dietary treatments formulating elevated contents of total lysine ranging from 0.55% to 0.79% (0.04 scale; 133 g of feed) from 23 to 29 weeks of age. Each treatment had six replicates with three birds per pen. Body weight was recorded triweekly and eggs were collected and weighted at 9:00 am daily. One hen from each pen was euthanized to collect blood samples and visceral organs were harvested and weighed. Egg production, egg weight and egg mass were lower (p < 0.05) in hens offered a diet containing 0.55% total lysine compared to those fed the diet containing higher total lysine. Hens offered a diet containing 0.71%, 0.75%, and 0.79% total lysine had greater (p = 0.008) egg production rate compared to those offered a diet containing lysine less than 0.71%. The number of total eggs produced tended to be greater (p = 0.083) in hens offered a diet containing 0.71 and 0.75% total lysine compared to the other treatments. The number of settable egg production was higher (p < 0.001) in hens offered a diet contacting 0.79% total lysine compared to those fed the diet containing lower levels of total lysine. The relative weights of oviduct and ovary were lower (p < 0.05) in hens offered a diet containing 0.59% total lysine compared to the other treatments. No difference found in body weight, the number of total eggs, double-yolk eggs and abnormal shell eggs among the treatments. The urea nitrogen, estradiol-17 beta and progesterone in plasma were not affected by treatments. Based on linear- and quadratic-plateau models, total lysine requirements for egg production, settable egg production and egg mass at the early laying period were to be 0.73%, 0.77%, and 0.71%, respectively. Modern broiler breeder hens likely require higher total lysine than NRC recommendation in a diet for enhancing productivity during the early-laying period.
Two experiments were conducted to evaluate the effects of diet complexity and fermented soy protein on growth performance and amino acid digestibility. In Exp. 1, a total of 120 crossbred weanling pigs ($5.68{\pm}0.80\;kg$ BW) were randomly allocated into 4 treatments. Each treatment had 6 replicate pens comprising 5 pigs in each replicate. Experimental diets consisted of simple (soybean meal as protein source) and complex (soybean meal, rice protein concentrate, potato protein concentrate and fish meal as protein sources) diets; each diet contained 0 or 5% fermented soy protein (FSP), respectively. Dietary treatments included: i) simple diet; ii) simple diet with 5% FSP; iii) complex diet; iv) complex diet with 5% FSP. Pigs were provided each experimental diet for 20 d (phase 1) and then fed the same common diet for 10 d (phase 2). During days 0-10, pigs fed FSP diets had greater ADG than those fed non-FSP diets (p<0.05). G/F in FSP treatments was significantly higher than that in non-FSP treatments (p<0.05) from days 0 to 10. Throughout the overall period, G/F was greater in FSP treatments compared with non-FSP treatments (p<0.05). On d 10, N digestibility was higher in pigs fed FSP diets than in those fed non-FSP diets (p<0.05). Diet complexity did not affect growth performance and nutrient digestibility (p>0.05) in this experiment. In Exp 2, 12 ileal-cannulated, weanling barrows were housed in individual metabolism crates and randomly assigned to 1 of 4 treatments (same as Exp. 1) by using a $4{\times}4$ Latin square design. Among the essential amino acids, apparent ileal digestibility (AID) of Met and Val were increased in pigs fed FSP diets compared with those fed non-FSP diets (p<0.05). AID of Met, Phe and total essential amino acids were higher in pigs fed complex diets than in those fed simple diets (p<0.05). Among the non-essential amino acids, AID of Ala in FSP treatments was greater than that in non-FSP treatments (p<0.05). In addition, Asp, Cys, Glu, Pro, Ser and total non-essential amino acid digestibilities in pigs fed complex diets were higher compared with those fed simple diets (p<0.05). Interaction was observed in AID of Met, Asp and Pro. In conclusion, these results indicated that feeding of 5% FSP to nursery pigs improved feed efficiency and AID of amino acids, and diet complexity did not maximize the growth performance of pigs in the subsequent phase.
The nutrient intake and association between dish group intake and blood glucose and serum lipid level (TG, cholesterol, LDL and HDL) was analyzed among 3 groups: 452 subjects in normal blood glucose group (NG: fasting blood glucose < 100 mg/dL and 2 hours postprandial blood glucose < 140 mg/dL), 258 subjects in impaired fasting glucose group (IFG: fasting blood glucose 100~125 mg/dL and 2 hours postprandial blood glucose ${\geq}$ 140 mg/dL) and 101 subjects in diabetic group (DG: fasting blood glucose $\geq$ 126 mg/dL and 2 hours postprandial blood glucose ${\geq}$ 140 mg/dL). The data were obtained from the 2005 National Health and Nutrition Survey of Korea. The 811 subjects were adults aged 40~64 without dietary treatment. In nutrients intake, IFG was the highest and DG the lowest in both quantity and quality. DG, especially, had the lowest intake in carbohydrates, fiber, proteins, Ca, P, K, vitamins B1 and C, and consumed the highest amount of alcohol. In macronutrients distribution ratio, the DG diet showed a lower energy intake from carbohydrates but higher from fat than the NG diet, while IFG showed a higher energy intake from carbohydrates and lower intake from fat in supper out of 3 meals and snacks. IFG preferred salt-fermented foods and DG preferred soups, braised foods and kimchi compared to other groups. NG preferred multi-grain cooked rice and both IFG and DG preferred plain white cooked rice. Regarding the association between dish group intake and blood glucose, cooked rice, soups, salt-fermented foods and kimchi were significantly related to blood glucose. In blood lipids, steamed-foods, beverages and fruits were inversely related to the risk of developing type 2 diabetes, whereas cooked rice, stews, saltfer-mented foods, seasoned-fermented foods and seasoned vegetables were directly proportional to the risk of developing type 2 diabetes and related diseases. Therefore, it is beneficial to avoid rich, salty and fatty foods and heavy alcohol consumption for controlling blood glucose and blood lipids, while steamed foods, foods rich in fiber (like multigrain rice) as a staple, and fruits and teas are recommended for preventing or managing type 2 diabetes risks.
This study was conducted to evaluate the effect of different processing of rice on rumen fermentation in in vitro and in situ experiments. Different processing treatments (extruding, roasting, and steaming) were used in this study and all treatments were ground through a cyclone mill (Foss, Hillerød, Denmark) fitted with a 1 mm screen. Non-treated rice was considered to a control substrate. Then, all treatments were used in in vitro and in situ experiments. Total gas production and dry matter digestibility in control were lower than any other treatment at all incubation times (P<0.01). The lowest ammonia nitrogen ($NH_3-N$) concentration was observed in control among treatments at 6, 12, and 24 h incubation (P<0.01). Extruding had a highest total volatile fatty acids (VFA) concentration at 6, 12 h incubation (P<0.01) and Steaming exhibited a highest total VFA at 24 h (P<0.01). The lowest total VFA concentration was observed in control at 6, 12, and 24 h (P<0.01). In an in situ, The highest value of soluble fraction, degradation rates, effective degradability was observed in extruding (P<0.01). It was considered that feed processing increased dry matter digestibility, total VFA concentration, and decreased pH as well as $NH_3-N$ concentration indicating that processing may increase nutrient degradation of rice in the rumen.
The objective of this study was to investigate the effect of soymilk and exercise on bone mineral density (BMD) in underweight college women of 19-22 years of age, who had lower bone mass. The BMD of the lumbar spine and femoral neck was measured for 52 underweight college women. Among them, 33 subjects, whose t-score value was below -1, were selected. Questionnaire survey, anthropometrical measurements, dietary recall, analysis of BMD, fasting serum osteocalcin and urinary deoxypyridinoline (DPD) were conducted before and after the 10 week study. The 33 subjects were divided into 2 groups: soymilk group (n=19), and soymilk + exercise group (n=14). The soymilk group was given 400$m\ell$ soymilk containing 60mg of isoflavones on a daily basis and the soymilk + exercise group exercised three times a week with a daily intake of 400$m\ell$ soymilk for 10 weeks. The average ages of the soymilk group and the soymilk + exercise group were 21.1 years and 20.4 years, respectively and, there were no significant differences between the soymilk group and the soymilk + exercise group in the areas of height, weight or Body Mass Index (BMI). At the baseline, the mean daily energy intake of the soymilk group and the soymilk + exercise group was 1,597.9kcal (79.43% of RDA) and 1,704.2kcal (85.2% of RDA), respectively. The mean calcium intake of the soymilk group (408.3mg) was not significantly different from that of the soymilk + exercise group (389.4mg). Despite the 400$m\ell$ soymilk supplementation, there were no significant changes of nutrient intake in either group after treatment. However, there were significant increases in BMD's of lumbar spine and femoral neck in both groups. There were some increases in the serum osteocalcin level and decreases in the urinary deoxypyridinoline level as well. BMD change of the soymilk group was not significantly different from that of the soymilk + exercise group. In conclusion, supplementary intake of soymilk (containing 60mg of isoflavones) resulted in a significant increase in the BMD's of the lumbar spine and femoral neck in underweight college women with low bone mass. However, exercise did not result in any significant changes in the BMD's, implying the necessity for more intensive and specific long-term physical training for any substantial changes. Further investigation is necessary to determine the exercise that most strongly affects BMD.
Kim, Jeongtae;Song, Yowook;Kim, Dong Woo;Fiaz, Muhammad;Kwon, Chan Ho
Journal of Animal Science and Technology
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v.60
no.2
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pp.1.1-1.6
/
2018
Background: Maize fodder is being used as staple feed for livestock but it lacks protein and essential amino acids; lysine and tryptophan. Intercropping maize with leguminous soybean crop is promising technique under limited land resources of South Korea but it can only give considerable advantages when adequate distance is provided between corn and soybean rows. Main aim of present study was to find-out adequate distance between corn and soybean seeding rows for optimum growth, yield and nutritive value of intercropped forage. Methods: Different interrow distances between corn and soybean were evaluated under four treatments, viz. 1) Corn sole as positive control treatment 2) Zero cm between corn and soybean (control); 2) Five cm between corn and soybean; 3) 10 cm between corn and soybean, with three replicates under randomized block design. Results: Findings depicted that height and number of corn stalks and ears were similar (P > 0.05) among different treatments. Numerically average corn ear height was decreased at zero cm distance. Dry matter percentage in all components; corn stalk, corn ear and soybean was also found not different (P > 0.05) but dry matter yield in component of corn ear was lower (P < 0.05) at zero cm distance as compared to that of 5 and 10 cm interrow distances. In case of nutritive value, total digestible nutrient yield in intercropped corn was also found lower (P < 0.05) at zero cm distance than that of 5 and 10 cm interrow distances between corn and soybean seeding rows. Substantial decrease in dry matter yield of maize ear at zero cm distance might be attributed to factor of closed interrow spacing which made interplant competition more intensified for light interception, necessary for photosynthetic activity. Lower dry matter yield in ear also reduced total digestible nutrients in intercropped maize because it was determining factor in calculation of digestible nutrients. The optimum yield and nutritive value of forage at wider interrow distance i.e. 5 cm between corn and soybean might be due to adequate interseed distance. Conclusion: Conclusively, pattern of corn and soybean seeding in rows at 5 cm distance was found suitable which provided adequate interrow distance to maintain enough mutual cooperation and decreased competition between both species for optimum production performance and nutritive value of intercropped forage.
The potentials of some Korean wild plants as a phytoremediator for cleaning heavy metal pollution were measured. Several plant species, Ambrosia trifida, Brassica juncea, Rumex crispus, and Abutilon theophrasti screened previously for phytoremediator were treated with cadmium and copper solution. In order to know the growth response to heavy metal stress, the plants were cultivated in hydroponic system containing heavy metals with different concentration. To know the effects of heavy metals on emergence and seedling growth, seeds of 4 species were sown in the pot and watered with heavy metal solution adjusted pH to 6.5, 5.5, and 4.5. A proposed species as potential phytoremediator, A. trifida, showed tolerance to $20{\mu}mol/L$ Cd and $80{\mu}mol/L$ Cu in nutrient solution without apparent growth reduction, and up to $100{\mu}mol/L$ Cd and $400{\mu}mol/L$ Cu without critical visual injury. Up to 311mg/kg of Cd and 369mg/kg were accumulated in dried aerial part in A. trifida. In contrast, A. theophrasti showed injury at $400{\mu}mol/L$ Cu. Significant differences were shown in Cu accumulation among the four species. A. trifida had much higher concentrations of Cd in the shoot, whereas R, crispus accumulated higher concentrations of Cd in the shoot. Testing plant species showed reduced emergence rate with heavy metal treatment. When pH was lowered, the emergence and seedling growth were affected severely with heavy metal. We can suggested that A. trifida was the most proper species for phytoremediation in heavy metal-polluted regions.
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