• 대한한방내과학회지
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• 제13권1호
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• pp.1-20
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• 1992

The study was carried out to investigate the effect of Kwandongwhasan extract and its constituent herbs onthe contractile force of isolated guineapig trachealis muscle and to elucidate its mechanism. The results of this study were as follows; 1. Kwandongwhasan significantly inhibited the contractile response of isolated guinea pig trachealis muscle by histamine. 2. Kwandongwhasan significantly inhibited the contractile response of isolated guinea pig trachealis muscle by acetylcholine. 3. Kwandongwhasan significantly inhibited the contractile response of isolated guinea pig trachealis muscle by 5-hydrooxytryptamine. 4. Kwandongwhasan significantly inhibited the contractile response of isolated guinea pig trachealis muscle by prostaglandin $F2\;{\alpha}$ 5. Herba Ephedrae (麻黃), Semen Armeniacae(杏仁), Cortex Mormi(紫白皮), and Flos Farfarae (款冬花), extract significantly inhibited the contractile response of isolated guinea pig trachealis muscle by histamine, acetylcholine, 5-hydroxytryptamine and prostaglandin $F2\;{\alpha}$. 6. Radix Glycyrrhdzae(甘草) extract significantly inhibited the contractile response of isolated guinea pig trachealis muscle by prostaglandia $F2\;{\alpha}$. 7. Rhizoma Anemarrhenae(知母) extract significantly inhibited the contractile response of isolated guinea pig trachealis muscle by histamine. 8. Bulbus Fritillariae(貝母) and Tuber Pinelliae(半夏) extract did not inhibit the significantly inhibited the contractile response of isolated guinea pig trachealis muscle.

• 대한한방내과학회지
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• 제13권1호
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• pp.99-109
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• 1992

In order to study the effects of Yunpaejaesueum known clinically for their effects of treatment for cough and asthma, the study was carried out to investigate the effect of Yunpaejaesueum extract on the contractile force of the isolated guinea pig trachea smooth muscle and elucidate its mechanism. The results were obtained as follows: 1. The isolated trachea smooth muscle of guinea pig was suspended in the organ bath with oxygenated Kreb's Henseleite bicarbonate buffer solution at $37^{\circ}C$, and the developed tension by the drug was recorded with isometric transducer(Nacro F-60). The resting tension was approximately 0.5g. 2. The isolated trachea smooth muscle of guinea pig was remakably relaxed by the administration of Yunpaejaesueum. 3. Yunpaejaesueum is significantly inhibited the contractile response of histimine 10-4 M in isolated guinea pig trachea smooth muscle. 4. Yunpaejaesueum is significantly inhibited the contractile response of acetylcholine 10-4 M in isolated guinea pig trachea smooth muscle. 5. Yunpaejaesueum is significantly inhibited the contractile response of 5-hydroxytryptamine 10-4 M in isolated guinea pig trachea smooth muscle. 6. Yunpaejaesueum is significantly inhibited the contractile response of prostaglandin F2a 10-7 M in isolated guinea pig trachea smooth muscle.

• 한국축산시설환경학회지
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• 제15권3호
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• pp.289-296
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• 2009

The effects of the processing mixture of pig manure and various organic wastes on the growth, cast production of earthworm, and conversion of organic matter to earthworm tissues by vermicomposting. The substances used in this experiments were sawdust, rice hull, coffee waste, brewery waste, litters, turfgrass cutting residues, rice bran, vegetable wastes and rice straw and were mixed with pig manure at a ratios of 50:50 (v/v), and pig manure 100% (control), respectively. The highest values of growth parameters, cast production and conversion efficiency of organic matter to earthworm tissues were obtained at the mixtures of pig manure with coffee waste, it may due to the favourable diet conditions to process with pig manure by vermicomposting. But, all of the earthworm died in the pig manure 100% (control) and pig manure with vegetable wastes treatments by vermicomposting was impossible in this experiment. The vermicast contained a higher values of total nitrogen, available phosphorus, exchangeable cations and cation exchange capacity than their parent materials with increased availability of nutrients and improved physicochemical properties.

• 한국축산시설환경학회지
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• 제11권3로
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• pp.169-176
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• 2005

본 연구에서는 국내 2층 돈사 및 톱밥돈사를 조사하였으며 현재 양돈에 적용되고 있는 분뇨처리 형태, 사육형태, 환기방식 및 돈사건축비의 실태를 현장조사를 통하여 분석, 평가함으로써 이를 바탕으로 우리나라 기후와 조건에 적합한 분뇨처리와 돼지사육이 가능한 고상식 돈사의 건축모델에 적용 가능성을 고려할 목적으로 무창 2층 돈사와 개방식 톱밥돈사 농장을 방문 조사한 결과를 요약하면 다음과 같다. 1. 2층 돈사의 분뇨에 수분조절재로 톱밥, 수피, 왕겨를 사용하였다. 톱밥돈사는 톱밥만을 사용하였으며, 수분조절재의 사용깊이는 대체로 $30\~60cm$로, 이용기간은 평균 $3\~6$개월 정도 이용하였다. 2. 2층 돈사에서 돼지의 사육형태는 1층에서는 주로 임신돈 및 분만돈을 사육하였고 2층은 자돈과 육성돈을 사육하고 있었다. 3. 환기시스템은 기본적으로 2층 무창돈사는 기계적 환기(mechanical ventilation)시스템을 설치하였고 톱밥돈사는 자연환기(natural ventilation)시스템으로 조합되어 있었다. 4. 2층 돈사의 단열재는 블록, 칼라강판 및 샌드위치 판넬 등을 사용하였고 단열재두께는 지붕 $75\~100mm$, 벽이 $50\~75mm$였으며 천장높이는 최소 2.0, 최대 3.0m로 조사되었다. 5. 평당 건축비는 무창 이층돈사는$70\~1,400$천원 이내였으며, 개방식 톱밥돈사는 자체 건축한 곳을 제외하고는 $300\~400$천원 내외로 건축비가 소요되었다

• 한국가축번식학회지
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• 제14권1호
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• pp.84-91
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• 1990

본 실험은 돼지난포란의 체외성숙과 체외수정 효과를 높일 수 있는 방법을 찾기 위하여 시도되었으며 직경 1~2mm와 3~7mm 난포로부터 채란된 난자를 mKRB(-BSA)에 돼지발정혈청(ESS), FCS 또는 투석돼지난포액(DFF)을 첨가한 성숙배양에서 24~48시간, 37$^{\circ}C$에서 배양하였다. 성숙된 난포란은 정소상체 정자와 24시간 배양 후 전핵행성 여부를 조사하였다. 36~48시간 배양에서 50~60%의 난자가 metaphase II에 도달되었고 난포 크기(1~2mm와 3~7mm)간에 체외성숙율의 차이는 없었으나 3~7mm 난포란에서 성숙분열이 다소 빨랐다. 체외성숙배양액에 5% ESS, 15% FCS 및 DFF 첨가시 대조구보다 다소 성숙율이 높았다. 체외수정율(전핵형성)은 5% ESS와 15% FCS 첨가 성숙시킨 난포란과 체내 수정능획득 정자와의 수정에서 각각 높은 경향이 있었다. 따라서 돼지난포란의 체외성숙과 수정에 ESS, FCS 및 투석난포액이 유효한 요인이 됨을 알 수 있다.

• 한국축산식품학회지
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• 제41권4호
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• pp.674-686
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• 2021

This study aimed to enhance the quality of broiler breast meat by adding pig skin collagen to feed. A total of 50 Ross 308 broilers were classified according to the following feeding regime for two weeks: basal diet (NC), basal diet+0.1% fish collagen (PC), basal diet+0.1% pig skin collagen (T1), basal diet+0.5% pig skin collagen (T2), and basal diet+1.0% pig skin collagen (T3). The moisture content was the highest in the PC group, and the protein content was the lowest in the T1 group (p<0.05). The fat content was higher in the T1 and PC groups, whereas the ash content was higher in the T3 group (p<0.05). Drip loss was the highest in the NC group and the lowest in the T2 group (p<0.05). Lightness was low in groups T2 and T3, redness was low in groups T2 and PC, and yellowness was low in groups T1, T2, and PC (p<0.05). The collagen content of the chicken breast was the highest in the T3 group, and that of the skin was the highest in the T1 group (p<0.05). The texture characteristics of springiness, cohesiveness, chewiness, and hardness were the highest in the T3 group (p<0.05). In conclusion, the supplementation of a broiler diet with pig skin collagen was found to increase the collagen content of the breast meat, indicating the improved quality of the broiler breast meat.

• 대한화학회지
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• 제66권3호
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• pp.202-208
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• 2022

본 연구는 악취 제거용 반응조를 제작한 후, 현장 시험을 통해 마그네시아(MgO)를 이용하여 돈분 폐수에서 발생하는 악취를 최대한 저감하기 위한 최적 조건을 얻고자 하였다. 이를 위해 마그네시아의 충진양, 돈분 폐수의 주입량, 폭기 방식, 폭기양, 폭기 시간이 고려되었다. 현장 시험은 돈분 폐수 저장소를 갖추고 있는 청운 가축농장에서 실시하였다. 돈분 폐수(500 kg) 무게 대비 마그네시아의의 첨가량을 증가시킬수록 암모니아와 황화수소의 발생량은 점차적으로 감소하는 경향을 보였다. 현장시험 결과, 반응조에 마그네시아를 0.8% 첨가하여 2일 동안의 폭기 시 돈분 폐수 중의 암모니아(NH₃)는 65%, 황화수소(H₂S)는 77% 감소하였다. 반응조 안의 돈분 폐수의 초기 pH는 8.2이었고 마그네시아를 0.8%까지 넣었을 때의 pH는 9.2를 나타내었다. 이러한 경향으로 비추어 볼 때, 마그네시아가 돈분 폐수 내의 pH를 점차적으로 상승시켜 약알칼리 상태로 만든다는 것을 알 수 있었다. pH가 증가함에 따라 폐수 내에 존재하는 암모니아 가스의 일부분은 공기 중으로 기화되고, 나머지 일부는 용해되어 있는 마그네슘이온, 인산이온과 화학결합한 후 침전되어 제거된다. 기존에 가축 농가의 대부분은 돈분 폐수의 악취를 제거하여 퇴비로 만들기 위해서 미생물을 활용한 6개월간의 폭기 과정을 거쳐야 했다. 대조적으로 미생물 활동에 영향이 없는 화학적 반응을 통해서 2일 내에 돈분 폐수로부터 악취를 저감할 수 있는 효과를 현 연구를 통해 입증하였다.

• 생명과학회지
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• 제19권10호
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• pp.1451-1455
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• 2009

Porcine cytomegalovirus (PCMV) is a betaherpesvirus which causes reproductive failure in breeding sows and generalized infection in newborn piglets. It has worldwide distribution including Korea. Serological survey on this virus has been reported in 76.3% of pigs, but virological survey and epidemiological analysis on PCMV distribution have been reported in only a few papers in Korea. In this study, we investigated the virological prevalence and infection status of PCMV on a farm level in selected swine farms with respiratory diseases. A total of 1,938 blood samples taken from groups of pigs of different ages were collected from 31 farms distributed nationwide in 2006 and 2007 and tested by PCR to detect the presence of PCMV. Virological prevalence at farm level and pig level were 96.8% and 17.5%, respectively, suggesting that PCMV has endemically infected Korean pig herds. The prevalence at farm level in gilts, sows and suckling piglet groups were 16.7%, 36.7% and 56.7%, indicating that vertical infections frequently occurred in conception or newborn stage. Thereafter, detection rates of PCMV were slightly increased in pig groups aged 40 and 70 days (70.0% and 73.3%), and then gradually decreased as they aged - 33.3% in 100, 26.7% in 130 and 16.7% in 160 day old pig groups. The prevalence at pig level has similar patterns to that at farm level. With the passage of time, the variation of infection patterns of PCMV was investigated in four PCMV-positive farms. Three blood samples were collected at intervals of 6 months in each farm, and examined for presence of PCMV using PCR. The results revealed that once PCMV was introduced to the pig farms, it continuously circulated between and within groups of sows and piglets in those farms. Taken together, it can be concluded that PCMV has endemically infected Korean pig farms and has the potential risk for emerging pathogen in combination with the known endemic pathogens including porcine reproductive, respiratory syndrome virus and porcine circovirus type 2. Therefore, more research is needed on diagnosis, epidemiology and control strategy for PCMV on the field.

• 농업과학연구
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• 제42권3호
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• pp.223-229
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• 2015

This study was conducted to investigate the changes in the pig productivity after ban of antibiotics growth promoter in commercial pig farms. A total 74 pig farms that herd size is from less than 100 sows to more than 500 sows were selected for survey. Changes of pig productivity before/after ban of antibiotics were analyzed by comparing with our survey results and report of KPPA (Korean Pork Producers Association, 2013). In the results, no difference on pig productivity was observed by herd size among our survey farms. Live born piglets have been raised as time passes since 2003, and then it reach to 10.6 head per sow in 2012. The numbers of weaning piglet tended to increase, but sow turnover ratio was found to be a tendency to decrease after ban of antibiotics in our survey results. There was no effect of using antibiotics on mortality of pre- and post- weaning. Marketing per sow per year (MSY) does not be improved because the post-weaning mortality was maintained at a high level, despite live pig born and weaning piglet have increased after 2003. In conclusion, a ban of antibiotics growth promoter does not directly affect to pig productivity, but it needs the efforts to reduce the mortality of post-weaning for improvement of pig productivity. We suggest that this data will be useful to swine industry as the fundamental information.

• 한국초지조사료학회지
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• 제27권3호
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• pp.189-196
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• 2007

제주지역에서 사료작물 작부체계에 있어 여름철에 주로 재배되고 있는 수수$\times$수수 교잡종을 공시하여 lysimeter에 돈분액비 시용수준이 유거수의 특성에 미치는 영향을 구명하기 위하여 무비구, 화학비료구(200kg N/ha), 돈분액비 시용구(200, 400, 600kg N/ha) 등 5처리를 두어 난괴법 3반복으로 수행하였다. 돈분액비의 시용 초기에 유거수내 BOD 및 COD는 돈분액비 600kg N/ha 시용구가 다른 처리구에 비해 유의적으로 높았다(p<0.05). 또한 돈분액비 시용량이 증가할수록 유거수의 T-N는 증가하였다. 그러나 유거수 중의 T-P 농도는 돈분액비 시용수준에 대한 영향은 크게 나타나지 않았다. 유거수 중의 $NO_3-N$ 및 $NH_4-N$ 농도는 돈분액비 시용수준이 증가할 수록 높았다(p<0.05). 결론적으로 제주 화산회토양에서는 돈분액비 시용량이 증가할 수록 수수$\times$수수 교잡종의 건물수량은 높일 수 있으나 유거수에 의한 환경오염이 우려된다. 따라서 제주 화산회토양에서 화학비료를 대체하기 위한 돈분액비 이용은 200kg N/ha 시용하는 것이 환경 오염방지 측면에서 안전할 것으로 판단된다.