• Asian-Australasian Journal of Animal Sciences
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• 제31권7호
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• pp.927-932
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• 2018

The demand for beef as a protein source is increasing worldwide, although in most countries beef accounts for considerably less than half of total meat consumption. Beef also provides a highly desirable eating experience in developed countries and, increasingly, in developing countries. The sustainability of beef production has different meanings in the various geographical and socio-economic regions of the world. Natural resources including land mass and uses, rainfall and access to livestock feed, and the robustness of the economy are major determinants of the perception of beef sustainability. In this overview of the 2016 International Symposium on "Future Beef in Asia" and this subsequent Special Edition of the Asian-Australasian Journal of Animal Sciences on "Current Situation and Future Prospects for Global Beef Production", the contributions have been grouped into the following categories: Countries in Southeast Asia; Europe; and Countries producing highly marbled beef for export and/or domestic consumption. They also include reference to Special Topics including marbled beef production, and use of "omics" technologies to enhance beef quality assurance. Among these broad categories, notable differences exist across countries in the production and marketing of beef. These reflect differences in factors including natural resource availability and climate, population size, traditional culture and degree of economic development including industrial and technological developments. We trust that the International Symposium and this Special Edition on Current Situation and Future Prospects for Global Beef Production, the contents of which that are briefly summarized in this paper, will serve as a valuable resource for the livestock industries, researchers and students with an interest in enhancing the prospects for sustainable, efficient beef production that satisfies the growing size and complexity of consumer demands and markets for beef.

• Preventive Nutrition and Food Science
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• 제13권1호
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• pp.23-27
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• 2008

The Korean native black pig (KNP) have several desirable meat qualities, which are highly demanded by Koreans in spite of its slow growth rate, low feed efficiency, and small litter size. The aim of this study was to evaluate meat quality and fatty acid composition of KNP at different slaughter weight in order to provide information to industry. Ninety female KNP of the same age (220 days) were divided into three groups by live body weights (30 pigs per each group); live weight of 50$\sim$59 kg (T1), 60$\sim$69 kg (T2) and 70$\sim$80 kg (T3), respectively. After slaughtering the longissimus dorsi muscle (LD) and backfat from each group were obtained after 24 hr chilling. Crude protein content and shear force of LD from T3 was higher than that from T1 and pH of LD was significantly lower in that from T1 than from T2 and T3. Color measurement indicated that LD of T2 group had a higher $L^*$-value and lower $a^*$-value than those of T1 and T3. Slaughter weight of KNP generally did not affect the fatty acid composition of LD and backfat but the content of oleic acid (C18:1) of T2 in LD was significantly higher than those of T1 and T3. The results may provide basic information to industry to promote the production and processing of KNP, and assist in meeting the Korean consumer's demand.

• 한국축산식품학회지
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• 제34권1호
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• pp.88-98
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• 2014

Total spleen lymphocytes, lymphocyte proliferation, tumor necrosis factor-${\alpha}$ (TNF-${\alpha}$), and interleukin-10 (IL-10) in spleen lymphocyte culture were studied in malnourished Wistar rats fed with goat milk yoghurt. Malnourished rats were created by using standard feed restriction as much as 50% of normal rats for 21 d. Goat milk yoghurt containing three types of microorganism e.g., Lactobacillus acidophilus, Sterptococcus thermophilus and Bifidobacterium longum derived from Lacto-B culture in powder form. After 21 d, the rats continued to receive restricted feeding and supplemented with goat milk yoghurt for 7 d. Total splenocytes were counted by hemocytometer. Splenocytes proliferation was expressed as stimulation index, whereas the TNF-${\alpha}$ and IL-10 of spleen lymphocyte culture were measured by ELISA technique. The total number of splenocytes and stimulation index of splenocytes in moderate malnourished and normal rats supplemented with goat milk yoghurt was not significantly different. The level of TNF-${\alpha}$ in the rat supplemented with goat milk yoghurt was lower (p<0.05) than the control group, whereas the level of IL-10 in the rat supplemented with goat milk yoghurt was higher (p<0.05) than the control group. In conclusion, goat milk yoghurt supplementation in malnourished rats could decrease TNF-${\alpha}$ as a representation of the pro-inflammatory cytokine, while it increases IL-10 as a representation of the anti-inflammatory cytokine.

• 한국축산식품학회지
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• 제38권5호
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• pp.878-888
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• 2018

In the current study, the probiotic potential of approximately 250 strains of lactic acid bacteria (LAB) isolated from piglet fecal samples were investigated; among them Lactobacillus plantarum strain JDFM LP11, which possesses significant probiotic potential, with enhanced acid/bile tolerance, attachment to porcine intestinal epithelial cells (IPEC-J2), and antimicrobial activity. The genetic characteristics of strain JDFM LP11 were explored by performing whole genome sequencing (WGS) using a PacBio system. The circular draft genome have a total length of 3,206,883 bp and a total of 3,021 coding sequences were identified. Phylogenetically, three genes, possibly related to survival and metabolic activity in the porcine host, were identified. These genes encode p60, lichenan permease IIC component, and protein TsgA, which are a putative endopeptidase, a component of the phosphotransferase system (PTS), and a major facilitator in the gut environment, respectively. Our findings suggest that understanding the functional and genetic characteristics of L. plantarum strain JDFM LP11, with its candidate genes for gut health, could provide new opportunities and insights into applications in the animal food and feed additive industries.

• 한국축산식품학회지
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• 제38권5호
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• pp.995-1007
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• 2018

Changes in the physicochemical properties of ready-to-feed liquid infant formula (LIF) stored at different temperatures (10, 20, 30, and $40^{\circ}C$) for 6 mon, focusing on 5-hydroxymethylfurfural (HMF) content, color, pH, fat globule size distribution, and rheological properties were determined. The HMF content increased with storage time, and LIF stored at $40^{\circ}C$ had a higher HMF content than that of LIF stored at $10^{\circ}C$. The lightness ($L^*$) decreased while redness ($a^*$) and yellowness ($b^*$) increased with increasing HMF content. The fat globule size and pH of LIF stored at $10^{\circ}C$ did not change. However, in the case of LIF stored at $30^{\circ}C$ and $40^{\circ}C$, the fat globule size increased and the pH decreased during storage for 6 mon. LIF stored at $40^{\circ}C$ had a higher apparent viscosity (${\eta}_{a,10}$) than that of LIF stored at $10^{\circ}C$, and the shear-thinning behavior of LIF stored at higher temperature was stronger than that of LIF stored at low temperature. The physicochemical changes of LIF during storage were accelerated by Maillard reaction (MR) at higher storage temperatures. Therefore, even if LIF is aseptically manufactured, we recommend that sterilized LIF should be stored at low temperature in order to minimize quality changes during storage.

• 한국축산식품학회지
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• 제38권5호
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• pp.1092-1100
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• 2018

The aim of this study was to determine meat quality characteristics and fatty acid composition of Korean native black goats (KNBG) finished on intensive feeding of alfalfa (ALF) and conventional feeding of commercial concentrate pellets (CCP) with low-energy common grasses. Ten KNBG (12 months old) were divided into two groups and subjected to either ALF or CCP treatments. The goats were slaughtered after 6 months of feeding with experimental diets to investigate meat quality characteristics and fatty acid compositions of longissimus lumborum muscle. There were no significant differences in proximate chemical composition, collagen, or myoglobin content between ALF and CCP groups of goats. Meat color, water-holding capacity, or tenderness was not significantly different between the two groups either. However, proportions of monounsaturated fatty acids and polyunsaturated fatty acids were significantly (p<0.05) different between the two groups. The proportion of oleic acid was significantly (p<0.05) higher in ALF goat whereas proportion of linoleic and arachidonic acids were significantly (p<0.05) higher in CCP goat. Results suggest that KNBG finished with intensive feeding of alfalfa could produce goat meat with desirable fatty acids for human diets.

• 한국균학회지
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• 제27권6호
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• pp.420-423
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• 1999

버섯재배에 피해를 주는 긴수염버섯파리의 발생양상을 알아보기 위하여, 경남 산청과 사천의 느타리버섯 재배사에서 성충과 유충 및 용의 밀도변동을 조사하였다. 긴수염버섯파리는 버섯재배 전기간 동안 유아등 및 배지에서 발견되었으며 버섯재배가 진행됨에 따라 밀도가 증가하였다. 유충의 경우 종균접종후 30일 경부터 배지에서 발생하기 시작하였다. 발생이 가장 많은 시기는 봄재배기간인 $3{\sim}6$월 하순이었고 $8{\sim}9$월 중에는 발생이 적었다. 가을재배시에 다시 밀도가 높아지며 겨울재배시에도 상당한 발생과 피해를 나타냈다. 가해양상으로는 유충이 배지와 균사를 가로지르며 섭식하고, 균사간 결합을 끊어서 균사생장과 발이가 불량하게 되고, 버섯대의 기부에서 주름살까지 파고들어 버섯형성과 상품성에 피해를 줄뿐만 아니라 배지도 직접 가해하였다.

• 유기물자원화
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• 제10권4호
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• pp.86-95
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• 2002

도시쓰레기의 혐기성 소화는 에너지원 및 온난화 가스 저감 문제 등에 의해 최근에 사회적 관심사가 되고 있다. 도시쓰레기는 고형분 함량이 높고 질소성분이 낮으며 셀루로스와 헤미셀루로스가 주성분으로 되어 있다. 도시쓰레기의 메탄 전화율은 대개 50%이며 $0.2m^2/kg$ VS에 해당한다. 고형물 농도가 높을수록 긴 수리학적 체류시간이 필요하며 주입물에 접종슬러지를 혼합하여야 한다. 도시쓰레기의 혐기성 소화 시 C/N비는 25가 상한이고 NH3-N의 적정농도는 700mg/L로 알려져 있다. pH조절을 위하여 흔히 석회와 탄산나트륨이 사용되고있는데 탄산나트륨을 3,500mg/L이상 첨가하면 나트륨 독성이 나타난다. 고온성 혐기 소화조는 운용과 관리가 어려우나 병원성 미생물 억제에 효과적인 것으로 알려져 있다. 도시쓰레기의 혐기성 소화공정의 최적화를 이룩하려면 소화공정에 관여하는 미생물의 작동기전에 대한 이해가 필요하다.

• 유기물자원화
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• 제5권2호
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• pp.7-16
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• 1997

일일 처리용량이 10톤인 난지도 음식쓰레기 퇴비화시범시설을 대상으로 하여 퇴비화과정동안의 물리 화학적 특성변화에 관한 연구를 수행하였다. 투입되는 음식쓰레기의 수분함량은 79% 내외였으며 공극 개량제로 폐목재를 샤용하였다. 퇴비화가 진행되는 동안 수분은 최종 31%로 감소하였으며 밀도에 상당한 영향을 주었다. 또한, 전기전도도는 퇴비화가 진행되는 동안 증가하는 경향을 보였다. 퇴비화가 진행되는 동안 VS와 TOC의 감소율은 각각 40%와 28%를 보였으며 VS와 TOC와의 상관관계는 유의수준에서 1.00으로 매우 상관성이 높았다. 고형물 C/N비와 물용출 C/N비 모두 숙성퇴비의 값을 보였다. 또한, $CO_2$, $O_2$ 등의 가스조성을 분석한 결과 퇴비화는 호기성조건하에서 정상적으로 진행되고 있었다.

• Asian-Australasian Journal of Animal Sciences
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• 제25권7호
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• pp.980-987
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• 2012

In order to investigate the effect of physical forms of starter diets on performance, weaning age, nutrient digestibility and rumen biochemical factors, 24 female of neonatal Brown Swiss calves (average body weight of $39.5{\pm}1.2kg$) were randomly assigned to three treatments. Dietary treatments were mashed (MS), pelleted (PS), and texturized (TS) starter using 8 calves from birth till 90 days of age in each treatment. Diets were formulated to be iso-nitrogenous with 21% crude protein. Based on the experimental results, calves that received PS and TS diets, had significant higher average daily gain (ADG) than those receiving MS (p<0.01). Dry matter intake in calves fed PS and TS was greater than calves fed MS (p<0.05), but there was no significant difference in feed efficiency. Treatments had no effect on initiation of rumination. Weaning age of calves in MS was longer than the other two treatments (p<0.05). Crude protein and organic matter digestibility in MS treated calves were lower than other treatments (p<0.05). No differences were observed in neutral detergent fiber (NDF) and ash digestibility among treatments (p>0.05). Ruminal pH was higher (p<0.01) in MS than the other groups, but ruminal ammonia (g/dl) concentration was not different among the treatments. Body measurements such as body length, pin width, hip width, pin to hip length, size of metacarpus and metatarsus bones, hip height, wither height, stomach size and heart girth were not significantly different among the treatments. Overall, it is concluded that starter diets in the form of pellet and texture can improve performance in neonatal Brown Swiss calves compared to the mashed form.