• The Korea Swine Journal
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• v.29 no.11 s.339
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• pp.158-161
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• 2007

한.미 FTA가 체결됨에 따라 축산분야의 피해가 가장 클 것으로 예상되면서 정부지원 규모에 축산인들의 관심이 집중되고 있는 가운데 내년도 축산분야 정부 예산안이 확정되어 발표됐다. 내년도 축산부문 총 사업규모는 9천8백8억원으로 올 예산 7천7백38억원 대비 26.7%, 2천70억원이 늘어난 규모이다. 내년 농림부 축산부문을 살펴보면, 오는 2012년 축산분뇨의 해양투기 금지에 따라 분뇨처리시설사업 부문의 예산은 2백54억원 증액되었으나, 강제폐기보상금 3백억원이 줄어들어 오히려 농특회계 사업규모는 금년 대비 1.5%, 25억원 감소했다. 반면 한.미 FTA 등 개방화에 대응하여 축산업의 경쟁력 강화 등을 위한 축발기금 및 FTA 기금 사업규모는 신규사업 발굴 등을 통해 금년 6천36억원보다 35% 증액된 2천1백9억원이 늘어났다.

• Proceedings of the Korean Society of Fisheries Technology Conference
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• 2000.05a
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• pp.74-75
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• 2000

핵산의 생합성은 salvage합성이 우선되며 이 경우 섭취된 음식물유래의 핵산등이 이용되므로 섭취되는 핵산의 영양학적 가치는 매우 높다(송영정사, 1995). Van Buren이나 Kulkarni등은 mouse에의 핵산 경구투여가 면역능을 개선하여 세균감염에 대한 방어에 유효하다고 보고하였고(Van Buren C.T et al, 1983, Kulkarni A.D et a 1986), 이들의 연구가 계기가 되어 섭취 핵산의 유용성에 대한 연구보고가 계속적으로 행하여지고 있는데 그 생리활성을 살펴보면 세포부활작용(Matsunaga et al, 1987) 면역증강작용(Frederic B. Rudolph, 1994) 과산화지질 형성억제작용(Uauy R et al 1985), 장내균총 및 지질대사의 개선작용(Uauy R, 1994, Angel Gil et al, 1986)등이다 본 연구에서는 부산물로 폐기되어지는 참치정소를 이용하여 핵산복합물질을 분리·정제하는 방법 및 그 추출물의 생리활성을 연구하므로써 새로운 기능성 소재로서의 이용가능성을 탐색하였다. (중략)

• Journal of Korea Society of Industrial Information Systems
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• v.28 no.6
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• pp.99-105
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• 2023

Submarines, which require a high degree of survivability, are among the most critical combat weapon systems in military strategic assets. Conventional submarines need air to operate their propulsion systems. Exhaust gases released into the water during snorkel navigation heat the surrounding fluid, producing a temperature wake. This wake, in turn, reduces the submarine's survivability. In this study, we conducted a preliminary experiment on the temperature traces formed by an underwater submarine's waste discharge. For this purpose, we collected propulsion system and navigation condition data from domestically introduced submarines and developed an experimental system to measure the temperature traces. As a result, we observed that high-temperature bubbles injected into the tank broke down into smaller sizes, and their temperature dropped to levels similar to the surrounding fluid. This observation was confirmed using a thermocouple sensor. Consequently, the thermal imaging system designed to measure the temperature trace of the water's surface did not detect any significant temperature traces.

• Journal of fish pathology
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• v.35 no.1
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• pp.103-111
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• 2022

This study has been performed to investigate the potential effects of by-product discarded after probiotics production (BPPP) on growth performance, immune gene expression, innate-immunity status, and disease resistance of carp, Cyprinus carpio. For 3 weeks, carp were fed four diets containing different levels of BPPP at 0, 0.1, 0.2 and 0.5% per kg of normal diet. Every 7 days of feeding, immune-related gene expression, serum lysozyme activity and ACH₅₀ were analyzed. Growth rates and challenge test with E. tarda were conducted after 3 weeks of BPPP feeding. Both lysozyme activity and ACH₅₀ were significantly (p<0.05) increased in all BPPP supplemented groups compared to the control at every 7 day for 3 weeks of feeding trial. The gene expression of pro-inflammatory cytokines, IL-1β and TNF-α was significantly (p<0.05) up-regulated until 21 days of feeding in all groups except for 0.2% group on day 7 post feeding. The anti-inflammatory cytokine IL-10 gene expression was only significantly (p<0.05) increased in 0.1% group on day 7 and decreased (p<0.05) on day 14 in all BPPP supplemented groups. On day 21, the IL-10 gene expression was augmented (p<0.05) in all groups. SOD gene expression was significantly (p<0.05) increased compared to the control on day 14 and 21 post feeding, whereas no significant difference was observed on day 7. In challenging test, 0.2%, 0.1%, 0.5% and control group showed 80%, 70%, 60% and 40% of survival rate, respectively. Feed conversion rate was only improved in 0.5% group. In conclusion, the present study indicates that dietary BPPP suplementation improved growth performance, innate immune response and bactericidal activity in carp.

• Journal of the Korean Society for Marine Environment & Energy
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• v.9 no.3
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• pp.154-159
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• 2006

It is essential to understand the decomposition characteristics for developing the optimum anaerobic digestion system of organic wastes. In this study, BMP (Biochemical Methane Potential) test using serum bottle was conducted to evaluate the anaerobic degradability of fish offal. 3 different groups of fish offal including waste from mackerel and hairtail handling except viscera and fish viscera were chosen for the substrates. Grinded fish offal was transferred anaerobically to serum bottle in amounts of 50 ml, 100 ml and 150 ml, respectively. BMP test was carried out in triplicate. Cumulative methane production and methane production rate depending on incubation time were evaluated. These results varied depending on substrate characteristics. The average values of ultimate methane yield ranged between $420ml{\cdot}CH_4/g{\cdot}VS$ and $490ml{\cdot}CH_4/g{\cdot}VS$, and the methane production and degradation rate of viscera were higher than those of other parts of fish offal. According to the analysis of elemental composition, average C/N ratio of fish offal used in this study was 5.2. Theoretical ultimate methane yield calculated from elemental composition was $522ml{\cdot}CH_4/g{\cdot}VS$. Biodegradability was calculated as 0.847.

• Proceedings of the KAIS Fall Conference
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• 2010.11a
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• pp.482-482
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• 2010

하수처리장에서 발생하는 유기성 슬러지는 대부분 해양투기에 의해 처분되고 나머지는 매립, 소각, 퇴비화 등으로 처분된다. 그러나 런던협약 '96 의정서' 발효에 의해 2012년부터 해양투기가 금지되고, 매립장 및 소각장의 신규건설은 님비(NIMBY) 현상에 의해 제한받기 때문에 효과적인 슬러지 처분 및 가용화 방법이 요구되고 있다. 현재 초음파[1]나 열처리[2], 오존[3,4], 미생물 처리[5,6] 등 물리, 화학, 생물학적 처리방안이 연구되고 있으나 이러한 방법들은 에너지 과소비, 2차 오염물질 발생에 따른 처리비용 증가 등의 단점을 가지고 있다. 따라서 본 연구에서는 기존의 연구 방법을 보안하고자 전기분해를 활용하여 슬러지 가용화를 시도함으로써 슬러지 발생을 저감시킬 수 있는 방법을 연구하였다. 본 실험에서는 전기분해를 위해 제작된 불용성 전극은 Titanium에 Iridium을 코팅하여 제작하였고, 최대 20V까지 전압을 고정시키고 시간에 따라 변화되는 전류와 전기전도도, pH 값을 관찰하였다. 실험에 사용된 활성슬러지는 3개월간 합성폐수로 순응화 시킨 후에 시료로 사용하였다. 전기분해에 의해 처리된 활성슬러지의 여액을 분석한 결과 SCOD, TN, TP 농도가 각각 510%, 9%, 106% 증가하였다. 이는 전기분해에 의해 미생물의 세포벽이 파괴되어 세포 내 물질들이 세포 외부로 용출되어 미생물들의 이용이 가능한 상태로 되었음을 알 수 있었다. 이는 국내 하 폐수의 낮은 C/N비 때문에 무산소조에 메탄올 같은 외부 탄소원을 공급하는 대신에 별도의 탄소원 공급 없이 가용화 된 슬러지를 반송시킴으로써 슬러지 저감에 따른 폐기 비용과 운전비용의 절감을 기대할 수 있어, 근본적인 슬러지 발생을 저감시킬 수 있는 해결책이라 할 수 있다.

• Journal of the Korean Society for Marine Environment & Energy
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• v.7 no.4
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• pp.180-184
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• 2004

The purpose of this study is the improvement of a hook for the collection of marine wastes on the seabed, which is connected to the spring device. The performance of the modified hook was tested on the seabed around Wando island. The collection efficiency of the hook was improved especially in the rocky area on the seabed. A experiment in the study area is verified with seafloor images displayed by Side Scan Sonar. The modified hook can be used for the collection of marine wastes with the its less frequent loss in the sea.

• The Sea:JOURNAL OF THE KOREAN SOCIETY OF OCEANOGRAPHY
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• v.9 no.2
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• pp.73-81
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• 2004

Voltage induced by the Tsushima Current on an abandoned submarine telephone cable has been measured since March 1998 in order to monitor the volume transport through the Korea Strait. Voltage has a good linear relationship with the transport measured by bottom-mounted Acoustic Doppler Current Profilers (ADCPs) along a section spanning the Korea Strait. This paper reviews researches using submarine cables briefly; we introduce the method to measure voltage on submarine cables, present some results focusing on the example of the Korea Strait, and mention the future prospect to use other submarine cables around Korea.

• 한국해양학회지
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• v.13 no.2
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• pp.26-30
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• 1978

This work concerns morphological studies of Alaska pollak, Theragra chalcogramma(PALLAS), and of the Nogari which is generally known as an immature form of the Alaska pollack. Observations are made to see whether significant differences in the meristic and morphometric characters can be recognized between two groups. Four meristic characters, namely, first anal fin rays, first dorsal fin rays, gill rakers, vertebra and three morphometric characters, namely, head length, snout length, eye diameter are chosen for the study. Results of the analyses reveal that the differences in all the selected meristic characters between Nogari and Alaska pollack are found to be not significant. Differences in the snout length in relation to the head length are found to be not significant . However, the differences in the head length in relation to the body length and the differences in eye diameter in relation to the head length are both found to be significant. In spite of the lack of informations on genetypic variations, it is reasonable to state that the Nogari appears to be a juvenile form of the Alaska pollak, and the differences in certain morphometric measurements between two groups are likely to be associated with the differences in the relative growth rates during the life stages.

• Resources Recycling
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• v.32 no.1
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• pp.13-20
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• 2023

The objective of this article is to summarize the commercial lithium ion battery (LIB) recycling processes in Korea and to suggest new direction for LIB recycling. A representative LIB recycler, SungEel Hitech Co. has successfully operated the LIB recycling process for over 10 years, and new recycling processes were recently proposed or developed by many recycling companies and battery manufacturers. In the new recycling processes, lithium is recovered before nickel and cobalt due to the rapid rise in lithium prices, and metal sulfate solution as final product of recycling process can be supplied to manufacturers. The main problem that the new recycling process will face is impurities, which will mainly come from end-of-life electric vehicles or new additives in LIB, although the conventional processes must be improved for mass processing.