• 한국식품과학회지
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• 제7권4호
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• pp.238-242
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• 1975

Aspergillus usamii shirousamii $U_2$ 균(菌)의 극식배양에 의한 유기산 및 당화효소생성에 미치는 영향에 대하여 실험한 결과는 다음과 같다. 1) 공시항균제(供試抗菌劑)중 일정한 농도(濃度)의 nitrofurazone과 $AF_2$의 첨가(添加)에 의하여 유기산과 당화효소(糖化酵素)의 생성이 촉진되었다. 2) 유기산의 생성은 밀가루에 $AF_2$ 10ppm 용액을 50% 첨수(添水)한 배지에서 가장 좋았다. 3) 당화효소(糖化酵素)의 생성은 밀기울에 nitrofurazone $100{\sim}500ppm$ 용액을 100% 첨수(添水)한 배지에서 가장 양호하였다.

• Animal Bioscience
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• 제35권11호
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• pp.1725-1732
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• 2022

Objective: This study was conducted to investigate the effects of selenium benefits on the physiological responses, litter performance, blood profiles and milk composition of lactating sows and tissue concentration of their progeny when mixed form of selenium was provided in a lactation diet. Methods: A total of 45 multiparous sows (Yorkshire×Landrace) with similar body weight, backfat thickness, and parity were assigned to one of three treatments with 15 sows per treatment in a completely randomized design. Organic and inorganic selenium were mixed and added to the diet at 0.15 ppm and 0.25 ppm, respectively. A non-Se-fortified corn-soybean meal basal diet served as a negative control. Treatments were as follows: i) Control: corn-soybean meal based diet, ii) ISOS15: control+ inorganic Se 0.15 ppm+organic Se 0.15 ppm, iii) ISOS25: control+inorganic Se 0.25 ppm+organic Se 0.25 ppm. Results: Serum selenium concentrations of sows and piglets were increased by the supplemental Se mixture at 7 days of lactation compared with the control (p<0.01, respectively). The kidney and muscle selenium concentrations of piglets were increased by the supplemental Se mixture at 21 days of lactation compared with the control (p = 0.03; p = 0.04, respectively). Conclusion: Consequently, supplementation with mixed inorganic and organic selenium in a lactating diet could improve the selenium status of sows and piglets; no differences were observed among the mixing levels.

• 농업과학연구
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• 제47권3호
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• pp.403-414
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• 2020

Gradient concentrations of Tithonia diversifolia green leaves and phosphate rocks were used to investigate their contributions as a fertilizer to the yield and quality improvement of a rainfed rice cultivar. Six treatments were compared: (1) T0, no fertilization (control); (2) T1, 1.28 g of phosphate rocks; (3) T2, 250 g of organic matter; (4) T3, 500 g of organic matter; (5) T4, 250 g of organic matter + 1.28 g of phosphate rocks; (6) T5, 500 g of organic matter + 1.28 g of phosphate rocks. The results showed that the germination percentage recorded 15 days after sowing varied from 58 - 76% between T0 and T5. The number of panicles ranged between 2 (T0) to 6.3 (T5). Moreover, the recorded length of the panicles ranged between 7.5 (T1) to 15.8 cm (T2), and the number of grains per panicle ranged between 25.5 (T1) to 273.5 (T3). The plant height was significantly increased in the T5 (79.27 cm) group compared to the T1 (33.63 cm) and control treatment (T0) (40.08 cm) groups. Although the plant height in the T2, T3, and T4 groups was slightly lower than the T5 group, the difference was not statistically significant. The average of the grain number per plant was high in the T3 (273.6 grains) group compared to the T1 and T0 (25.5 and 32.8 grains) groups, respectively. These results suggest that the combination of T. diversifolia leaves and phosphate rocks as a natural fertilizer would be beneficial when integrated into soil fertility management strategies and would contribute to improving crop yield and quality.

• 한국유기농업학회:학술대회논문집
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• 한국유기농학회 2009년도 하반기 학술대회
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• pp.316-316
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• 2009

This study was conducted to investigate the effects of environment-friendly materials on garlic cultivation, and the methods for processing garlic at proper ripening stage to increase its antioxidant properties and market value. The functional properties of garlic and processed black garlic were analyzed in vitro and ex vivo. The ethanol extracts of garlic and black garlic were used in the antioxidant, linoleic acid autooxidation, lipid oxidation and RAW264.7 indicator cell using NO induced activity analyses. Also, toxicity tests by RBL-2H3 and RAW264.7 indicator cell using MTT assay were compared. Obesity inhibition test of garlic and black garlic were also studied.

• Asian-Australasian Journal of Animal Sciences
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• 제33권7호
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• pp.1156-1166
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• 2020

Objective: The aim of this study was to evaluate the effects of compound organic acid calcium (COAC) on growth performance, hepatic antioxidant status and intestinal barrier of male broilers under high ambient temperature (32.7℃). Methods: Nine hundred healthy one-d-old Cobb-500 male broiler chicks were randomly assigned into three groups with six replicates of 50 birds each. A basal diet supplemented with 0% (control), 0.4% and 0.8% COAC, respectively were fed to birds for 6 weeks. All treatments were under high ambient indoor temperature of 32.7℃, and had a constant calcium and available phosphorus ratio. Results: The results showed that, compared with control, the average daily gain of broilers in 0.4% and 0.8% was significantly increased and the ratio of feed to gain in in 0.4% and 0.8% was significantly decreased at 1 to 21, 22 to 42 and 1 to 42 days of age (p<0.05). Compared with control, 0.8% COAC slightly decreased (p = 0.093) the content of malondialdehyde in liver at 42 days of age while 0.4% COAC significantly decreased (p<0.05) the activity of alkaline phosphatase. Furthermore, 0.4% COAC significantly enhanced the intestinal barrier function via increasing jejunal and ileal ocln transcription, promoting jejunal mucin 2 transcription at 42 days of age (p<0.05), and decreasing jejunal toll-like receptor 2 (TLR-2) and ileal TLR-15, inducible nitric oxide synthase compared with control group (p<0.05). Whereas, no significant differences on the transcription of interleukin-1β in jejunum and ileum were observed among three treatments (p>0.05). Overall, heat stress caused by high natural environment temperature may induce the damage to hepatic antioxidation and intestinal barrier. Conclusion: Dietary inclusion of COAC can improve the tolerance of broilers to thermal environment through the modification of antioxidative parameters in liver and the mRNA expression of genes in intestinal barrier, resulting in an optimal inclusion level of 0.4%.

• Asian-Australasian Journal of Animal Sciences
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• 제33권1호
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• pp.132-138
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• 2020

Objective: To investigate the effects of low-dose trace mineral proteinates on reproductive performance, mineral status, milk immunoglobulin contents and fecal mineral excretion of sows. Methods: Eighty crossbred sows (Landrace×Large White) were randomly allocated to two groups in a 135-day trail, from breeding through 21 d postpartum. The two treatments were inorganic trace minerals (ITM): a basal diet+inorganic iron (Fe), copper (Cu), manganese (Mn), and zinc (Zn) at 90, 15, 25 and 90 mg/kg, respectively and organic trace minerals (OTM): a basal diet+proteinates of Fe, Cu, Mn, and Zn at 72, 12, 20, and 72 mg/kg, respectively. Results: Compared with ITM, OTM significantly increased (p<0.05) the number of piglets with birthweight >1 kg, the litter weaning weight, and milk Fe, Cu contents. No significant differences (p>0.05) were observed on sow hair mineral contents or immunoglobulin M (IgM), IgG, and IgA contents in colostrum and milk. In comparsion to ITM, OTM decreased fecal Fe, Cu, Mn, and Zn contents of gestating sows (p<0.01) and Fe, Mn, and Zn in lactating sows (p<0.01). Conclusion: These results indicate that low-dose mineral proteinates can increase the number of piglets with birthweight >1 kg, the litter weaning weight and certain milk mineral concentrations while reducing fecal mineral excretion.

• 한국환경농학회지
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• 제28권2호
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• pp.146-157
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• 2009

The influence of Pb-citrate complex formation on Pb uptake and the effect of Pb on organic acid exudation were investigated using four plant species, viz., sunflower (Helianthus annuus L), Indian mustard (Brassica juncea), canola (Brassica napus) and vetiver grass (Vetiveria zizanioides) under hydroponic conditions. Seedlings were exposed to different levels of Pb and Pb-citrate for 24 hrs and subsequently Pb distributions in plant shoot, root and hydroponic solution were measured. The dissolved organic carbon (DOC) concentration generally decreased as the concentration of Pb in the hydroponic solution increased. In contrast to DOC, the total organic acid concentrations exuded from Indian mustard roots significantly increased (424 to 6656 mg $kg^{-1}$) with increased Pb treatment, implying that exuding organic acids were involved in Pb accumulation in Indian mustard. The complexation of Pb with citrate enhanced Pb accumulation in the above ground portions. Lead concentration in Indian mustard increased from 2.05 mg $kg^{-1}$ to 6.42 mg $kg^{-1}$ when the concentration of citrate in solution increased from 0 to 50 mg $L^{-1}$. This result showed enhanced translocation of Pb from root to shoot with observation of transfer coefficient ($K_t$) increase from 2.03E-3 to 5.72E-3.

• 한국버섯학회지
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• 제8권1호
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• pp.1-5
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• 2010

버섯의 다원적 기능은 생리활성 기능, 가축 사료생산 기능, 유기질 비료 생산 기능, 생태계 분해자로서의 기능, 환경 오염물질 정화 기능, 식품 영양학적, 기호 식품적, 생리활성 기능 이다. 이 중 생리활성 기능, 가축 사료생산 기능, 유기질 비료 생산 기능과 생태계 분해자로서의 기능은 정량화를 하였고 그 나머지 기능은 정량화하는 연구가 더 필요하였다. 정량화된 버섯의 다원적 기능을 경제적 가치로 환산하면 112조 922억원이며 정량화하지 못한 부분까지 합하면 이의 2배 이상될 것으로 추정한다. 이렇게 추정할 경우 쌀의 다원적 기능 약 100조원의 경제적 가치에 비해 버섯은 거의 비슷한 가치가 있다고 볼 수 있다. 버섯의 생리활성물질 베타글루칸의 산업적 가치는 약 112조원, 가축 사료생산 기능은 약 618억원, 유기질 비료생산 기능은 약 56억원, 생태계 분해자로서의 기능은 약 360억원으로 나타났다.

• 농업과학연구
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• 제27권2호
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• pp.125-134
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• 2000

This observation was to investigate the influence of raw organic matter incorporated into soil at various rates on hydraulic conductivity and elution of solute throughout soil column. Generally the organic matter content in a practical agricultural field was approximately 3%. However, the application rate of organic matter in the field tends to rapidly increase in these days. Therefore, we raised the application rate of organic matter up to 10% in this investigation. From the experiment, we found that the hydraulic conductivities rapidly decreased with increasing rate of organic matter as well as rapid decrease in total volume of eluent during the same period. And electrical conductivities in the effluent significantly decreased after 2 pore volume, resulting in approaching to the criteria of saline soli. From this we could assume that the organic matter may influence the crop growth in the beginning. However excessive irrigation in the field may cause saturation of soil leading to reduction of soil. Therefore, there must be a management methods in application of organic matter with respect to soil water control.

• 유기물자원화
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• 제23권3호
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• pp.23-29
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• 2015

현재 지구는 지구 온난화, 기상이변의 이상신호로 인해 전 세계적으로 자연과 인간의 상생이 중요하며, 인간의 먹거리까지 친환경 웰빙 음식에 관심이 급증한다. 우리나라는 지난 10여 년 동안 유기농업이 발전 되어왔으나 선진국에 비교해 미비하나 향후 전 세계 유기농 시장이 확대될 것이다. 2015년 세계유기농산업엑스포가 충북 괴산군에서 9월 18일부터 10월 11일 까지 개최됨에 따라 우리나라 유기농업이 발전할 것이다. 성공적이며 안전한 엑스포가 되어 안녕강국 대한민국이 되기에 일조하는 방향으로 주요 지표들을 개발하였는바, 5개 부문의 위험성 감쇄가 주안점이며, 녹색보전, 경제성장, 사회발전, 과학기술예술성, 자율자발성부문이다.