• 한국유기농업학회지
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• 제13권1호
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• pp.85-99
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• 2005

This trial was carried out to determine effects of organic feeds in comparison to conventional diet on feed intake, digestibility, and nitrogen retention in Korean native goats. Twelve Korean native goats were allotted to treatments in four groups of three goats and then they were housed in separate metabolism cages for 21 days. Treatments included conventional diet (A) as a control group and three organic feed groups (B: organic rice straw, C: organic nee leaves, D: organic mixture of rice straw and tree leaves). The A treatment, conventional diet, consisted of common rice straw and commercial concentrates at a proportion of 60 and 40%, respectively. All ingredients of organic feeds treatments were organically produced-agricultural products without any application of chemical fertilizer and pesticide. Four experimental diets were formulated to have the same ratio of forage to concentrate and similar contents for protein and carbohydrate across treatments and they were offered to goats ad libitum. Feed intake, apparent nutrient digestibility and nitrogen retention were investigated. For chemical compositions of experimental diets, all nutrients except crude ash and ether extract were not significantly different across treatments as we expected. Crude ash content was highest in the A treatment (P<0.05), however, it was not significantly different among organic feeds treatments. Ether extract content was higher (P<0.05) in C and D treatments than in A and B. Even if dry matter intakes for organic feeds treatments were not significantly different among them, they were significantly higher (P<0.05) compared with conventional diet. Fecal excreta were not significantly different across treatments, resulting in significantly higher digestible dry matter (g/day) in treatments of organic feeds (P<0.01). Average daily gain (ADG) and feed efficiency (FE) were more increased (P<0.01) in treatments of organic feeds compared with conventional diet. Digestibilities for most of nutrients except NFC had the same trend as ADG and FE, however, NFC digestibilities for C and D treatments were significantly lower (P<0.01) than those of A and B. Nitrogen intakes for organic feeds treatments were significantly higher (P<0.001) than conventional diet, with no difference among organic feeds treatments. Fecal nitrogen loss was higher (P<0.05) for C and D treatments than for A and B. Retained nitrogen contents were significantly higher (P<0.05) for organic feeds treatments than for conventional diet, but nitrogen retention rate did not show any difference across treatments. The results showed that organic feed supplementation more improved feed intake, digestibility and nitrogen retention in comparison with conventional diet, and thus they could be concluded that organic feeds might contribute to animal performance and a safer production of animal product.

• 한국유기농업학회지
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• 제18권4호
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• pp.441-461
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• 2010

This study explores the development processes of organic farmers' groups that have tried to manage farming activities at the regional level. They formed the groups from different reasons and situation each other. The motives to set up the groups differ between them. Some set up for the local farmers movement, others aim to get more income from the group activities. Whatever the motives, they all have been succeeded in the agricultural sector. Many new-born farmer's groups in organic farming sector tend to be regarded them as the models for success. Therefore, it is important to clarify how they have overcome difficult situation that may differ from group to group. This study tries to find and compare the four organic farmers groups with the factors of the historical processes for establishment, the process of business development, and the development of networks.

• 한국유기농업학회지
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• 제19권spc호
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• pp.165-168
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• 2011

An organic apple (Malus ${\times}$ domestics Borkh.) orchard was established to study the interaction effects of ground cover management systems (GMS) and nutrient sources (NS) on soil and tree nutrient status and tree growth. Trees received one of four GMS: 1) green compost (GC), 2) wood chips (WC), 3) shredded paper (SP), and 4) mow-and-blow (MB). Across all GMS, one of three NS was applied: A) a commercial organic fertilizer (CF), B) poultry litter (PL), and C) control (NF). Overall, GMS had greater effects on the variables than did NS. GC mulch supplied greater nutrients, followed by WC, SP, and MB mulches. SP trees had lower foliar [N] in the first two years than the GC and WC trees. GC-and WC-treated trees had larger trunk cross sectional area than the SP and MB trees.

• 대한가정학회지
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• 제9권2호
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• pp.30-33
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• 1971

1. The present paper deals with the composition of organic acid in Porphyra tenera, roasted Porphyra tenera and Undaria pinnatifida. 2. There are little differences in the composition of organic acids among three of them, Porphyra tenera, roasted Porphyra tenera and Ucdaria pinnatifida. Butyric, propionic, acetic, fumaric, succinic, lactic, oxalic, malic, citric and unknown two acids were identifled by silica gel colcumn chromatography. 3. All of volatile organic acid, namely butyric, propionic and acetic acid in Porphyra tenera were decreased during the raosting.

• 한국토양비료학회지
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• 제45권5호
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• pp.760-763
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• 2012

친환경 포도재배를 위하여 농가에서 용이하게 구입 및 제조가 가능한 유기농자재의 효과를 조사한 결과 본 연구에 사용한 농자재의 pH는 4.6이하였고, 아미노산액은 상대적으로 높은 비료성분을 함유하였다. 포도수확기 토양의 pH는 시험초기 (농자재 처리 전)와 비교할 때 감소하였고, EC와 유기물함량은 증가하였으며, 유효인산은 대조구 (관행처리)를 제외하고 증가하였다. 치환성 K는 은행잎추출액 처리구와 대조구, 치환성 Ca는 무처리구와 아미노산용액 처리구에서 감소하였고, 치환성 Mg는 모든 농자재 처리구에서 감소하였다. 포도 잎의 질소 (N) 함량은 chitosan과 아미노산액 처리구, P는 chitosan, 목초액 및 아미노산액 처리구, K는 chitosan과 아미노산액 처리구, Ca은 chitosan 처리구, Mg 함량은 아미노산액 처리구에서 가장 높았다. 포도 수량은 목초액 처리구와 대조구에서 $1,581{\sim}1,583kg\;10^{-1}$로 가장 많았고, 당도는 무처리구를 제외하고 같은 수준을 보였다.

• 한국진공학회:학술대회논문집
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• 한국진공학회 2013년도 제45회 하계 정기학술대회 초록집
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• pp.266.1-266.1
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• 2013

Large-scale single-crystal organic nanowire arrays were generated using a direct printing method (liquidbridge- mediated nanotransfer molding) that enables the simultaneous synthesis, alignment and patterning of nanowires from molecular ink solutions. Using this method, single-crystal organic nanowires can easily be synthesized by self-assembly and crystallization of organic molecules within the nanoscale channels of molds, and these nanowires can then be directly transferred to specific positions on substrates to generate nanowire arrays by a direct printing process. Repeated application of the direct printing process can be used to produce organic nanowire-integrated electronics with two- or three-dimensional complex structures on large-area flexible substrates. This efficient manufacturing method is used to fabricate all-organic nanowire field-effect transistors that are integrated into device arrays and inverters on flexible plastic substrates.

• 농촌지도와개발
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• 제31권2호
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• pp.57-65
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• 2024

This study was designed to find out consumers' behavior towards eco-friendly processed foods and to investigate the relationship between consumers' purchase intention of eco-friendly and organic processed foods, depending on the country of origin. Five hundred consumers were taken from all over the country for an empirical analysis. The results indicate that consumers' satisfaction with a certificate system of eco-friendly products is relatively high. In addition, it is found that consumers give more credit to the safety of domestic organic foods than imported organic foods. The study implies that consumers perceiving the importance of the country of origin are more likely to buy domestic organic foods. Furthermore, the importance of the country of origin and age have a positive relationship with the purchase intention of domestic organic foods.

• 한국물환경학회지
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• 제21권2호
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• pp.205-210
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• 2005

There has been a growing interest in NF membrane for drinking water treatment, because it can remove simultaneously both hardness and hazardous micro pollutants such as pesticides and THM precursors. In this work, a hollow fiber NF membrane known as a composite membrane was employed for the rejection properties of both hydrophilic solutes and micro organic pollutants, where the former was used to evaluate the molecular sieving effect of this membrane and the latter was employed for the investigation of solute-membrane interaction as hydrophobic materials. This membrane effectively rejected the hydrophilic solutes and the permeation of them was mainly controlled by the molecular sieving effects such as molecular weight and molecular width. In the case of all micro organic pollutants, the rejections were varied from 42.2% for Simazine to 91.6% for Malathion, and the parameters related to the steric hindrance could significantly play an important role in the rejection. In the batch type adsorption experiments, all micro organic pollutants were entrapped mildly on the membrane in spite of lower degree compared with that of aromatic compounds, and they were correlated with log K.

• Journal of Pharmaceutical Investigation
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• 제36권4호
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• pp.283-286
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• 2006

The present study aimed to investigate the interaction of nucleoside analogs with human organic anion transporter 1 and 3(hOAT1 and hOAT3) that play a primary role in the tubular uptake of endogenous and exogenous organic anions in the kidney. The interactions of ddC, ara-C, ara-A and ara-U with hOAT1 and hOAT3 were examined using MDCK cells stably overexpressing hOAT1 or hOAT3. Among the tested drugs, ddC showed the highest affinity to hOAT1 with $IC_{50}$ values of 5.2 mM, while ara-A, ara-C and ara-U weakly inhibited the cellular uptake of $[^3H]-PAH$ in MDCK-hOAT1 cells at 1 mM. In contrast, all the tested drugs did not have any inhibition effect on the cellular uptake of $[^3H]-estrone$ sulfate in MDCK-hOAT3 cells over the drug concentration of 0.01-2 mM, implying that they might not interact with hOAT3. Taken all together, the present study suggests that hOAT1 could weakly interact with nucleoside analogues such as ddC, ara-C, ara-A and ara-U but the interaction with hOAT3 during the urinary excretion of these nucleoside analogues may be negligible in the kidney.

• 한국환경농학회지
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• 제17권2호
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• pp.150-155
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• 1998

To investigate effects of organic matter application on heavy metal uptake of infant rice seeding, the various amount of organic matter(peat and $Bio-com^{(R)}$)was applied on Cd or Cu treated nursery bed soil. No growth difference was observed up to 20mg/kg of Cu treatment. Above 20mg/kg of Cu treatment, the seeding height and top dry weight were decreased but the Cu uptake by seeding was increased with increasing Cu treatment level. The mat formation was poor above 20mg/kg of Cu treatment, however, the seeding peat application level. All peat treatment resulted better mat formation than control. The seeding height and top dry increasing Cd treatment level. The mat formation was not effected by either Cd treatment level or organic matter sources. The effect of peat and $Bio-com{(R)}$ application on Cd uptake by infant rice seeding was not observed at all Cd treatments level.