• 수산해양교육연구
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• 제26권6호
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• pp.1209-1216
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• 2014

This feeding experiment was conducted to investigate the effects of slurry type diet on growth performance and survival rate of growing leptocephalus, eel larva. We need to find new materials of diets for rearing eel larvae. Test diets were formulated with the eggs of the shark, fish soluble concentrate, soybean peptide and fish protein hydrolysate. Fish (average length 6 mm) were fed 3 slurry type diet(A, B and C) based on shark egg for 5 times per day. During feeding experiment, survival rates were significantly different among 3 slurry type diets. Total protein, lipid, moisture, ash and free amino acids contents were analyzed for slurry type diets. Leptocephalus fed the C slurry type diet was grown up to $38.0{\pm}9mm$ at 150 days. But all leptocephalus fed B slurry type diet were died at 100 days, reaching $16.4{\pm}8mm$. This results suggest that basic information for diet development of eel leptocephalus.

• Asian-Australasian Journal of Animal Sciences
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• 제29권9호
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• pp.1273-1279
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• 2016

The objectives of this study were to determine an optimal cultivation time for populations of yeast and lactic acid bacteria (LAB) co-cultured in fermented milk and effects of soybean meal fermented milk (SBMFM) supplementation on rumen degradability in beef cattle using nylon bag technique. The study on an optimal cultivation time for yeast and LAB growth in fermented milk was determined at 0, 4, 8, 24, 48, 72, and 96 h post-cultivation. After fermenting for 4 days, an optimal cultivation time of yeast and LAB in fermented milk was selected and used for making the SBMFM product to study nylon bag technique. Two ruminal fistulated beef cattle ($410{\pm}10kg$) were used to study on the effect of SBMFM supplementation (0%, 3%, and 5% of total concentrate substrate) on rumen degradability using in situ method at incubation times of 0, 2, 4, 6, 12, 24, 48, and 72 h according to a Completely randomized design. The results revealed that the highest yeast and LAB population culture in fermented milk was found at 72 h-post cultivation. From in situ study, the soluble fractions at time zero (a), potential degradability (a+b) and effective degradability of dry matter (EDDM) linearly (p<0.01) increased with the increasing supplemental levels and the highest was in the 5% SBMFM supplemented group. However, there was no effect of SBMFM supplement on insoluble degradability fractions (b) and rate of degradation (c). In conclusion, the optimal fermented time for fermented milk with yeast and LAB was at 72 h-post cultivation and supplementation of SBMFM at 5% of total concentrate substrate could improve rumen degradability of beef cattle. However, further research on effect of SBMFM on rumen ecology and production performance in meat and milk should be conducted using in vivo both digestion and feeding trials.

• 농약과학회지
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• 제17권4호
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• pp.359-362
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• 2013

본 연구는 우리나라 과수에서 사용되는 살균제인 picoxystrobin의 지렁이에 대한 독성 및 위해성 평가를 위하여 수행되었다. Picoxystrobin 원제(99.3%)의 지렁이에 대한 급성독성($LC_{50}$)은 10.93 mg/kg이었으며, 액상수화제(25%)도 원제와 유사한 8-16 mg/kg을 나타내었다. 이러한 독성값은 현재 우리나라의 등록농약에 대한 지렁이 평가기준에는 문제가 없는 수치이나, 실제 약제살포 후 강우를 예상한 모의시험에서 시험개시 24시간 내에 모든 지렁이가 치사하는 양상을 보였다. 이러한 결과는 약제의 특성과 살포 이후 강우를 고려한 위해성 평가의 필요성을 보여주고 있다.

• 한국식품과학회지
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• 제18권5호
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• pp.398-405
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• 1986

루우핀 콩의 식품가공 적성을 평가하기 위하여 서호주에서 생산된 Lupinus angustifolius의 종실을 삶음 속도, 콩나물 성장속도 및 균체성장속도 등을 검토하고 또한 루우핀 종실로부터 만들어진 단백질 농축물(LPC)을 우리나라 식품제조에 활용하는 방안등을 조사하였다. 루우핀 콩의 수분 침지속도는 대두보다 컸으나 삶음 속도는 대두보다 크게 떨어졌다. 가열에 의한 연화속도 $D_{100}$은 대두의 경우 84분이었으나 루우핀 콩의 경우 345분이었다. 루우핀 콩에 포함되어 있는 잔유 쓴맛성분(주로 알카로이드)와 황색색소 및 지방은 핵산-알콜-물을 혼합한 이상용매로 제거할 수 있으며 여기에서 얻어진 단백질 농축물은 단백질 함량 50% 이상을 함유하며 유백색의 순한 풍미를 가지는 물질로 우수한 식품재료로 판단되었다. 루우핀콩 단백질 농축물에 탄수화물(주로 셀롤로오스)분해효소 처리를 하면 가용성이 높고 단백질 함량이 증가된 제품을 얻을 수 있다. 이들 재료들을 이용하여 식물성 대용유와 유산균 발효음료의 제조 가능 하였으며 이들 제조방법의 제문제를 검토하였다.

• 한국식품영양과학회지
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• 제43권10호
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• pp.1549-1554
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• 2014

메밀 성분 중 루틴의 추출 효율을 높이기 위해 메밀을 발아한 후 루틴 및 polyphenol 추출 효율이 높은 추출방법을 선택하였다. 메밀의 발아는 흙 재배가 효율적이었으며, 8일 후에는 polyphenol 함량이 10.66 mg/g으로 메밀 종자에 함유되어 있던 polyphenol 함량의 10배 이상 높은 양을 얻을 수 있었다. 발아 메밀에서 추출된 루틴을 포함한 polyphenol 성분은 에멀젼을 제조하여 열에 대한 안정성을 높이는 데 효율이 있는지를 확인하였다. 에멀젼은 homo mixer만을 통과시키는 것보다 유압식 균질기를 통과시켰을 때 포접 효율이 높을 뿐만 아니라 열처리 온도에 대하여 열 안정성이 우수한 것을 알 수 있었다.

• Asian-Australasian Journal of Animal Sciences
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• 제15권2호
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• pp.195-204
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• 2002

The objective of this study was to examine the impact of three categories of supplements on intake and diet induced difference on degradation of straw substrates. Sixteen crossbred cattle fitted with rumen cannula were randomly divided into 4 equal groups. Animals were fed on wheat straw ad libitum without any supplement except mineral mixture (control; $T_1$) or supplemented with concentrate mixture (CS; $T_2$) or green Lucerne (GLS; $T_3$) or urea-molasses block lick (ULS; $T_4$). Total dry matter intake in $T_2$, $T_3$ and $T_4$ was increased by 70, 54 and 49%, respectively compared to $T_1$ which was only 1.55 kg/100 kg B.Wt. Other than control animals, straw intake was less on $T_3$ than $T_2$ or $T_4$. In Sacco degradation of untreated and urea treated wheat or paddy straw in different treatments indicated that the supplements had a significant (p<0.01) impact on rapidly soluble (A) and insoluble but potentially degradable (B) fractions of straw. Urea treatment increased fraction-A but, provision of supplement improved fraction-B also. Effective degradation (ED) of OM was better on $T_2$. Rate of degradation (C) of OM and CWC was dependent on diet and type of straw but hemicellulose and cellulose were related to latter factor only. ED of cell wall carbohydrates (CWC) was similar in $T_2$ and $T_4$ but higher than $T_3$. CS was more effective in improving the degradation of both untreated and urea treated straw while ULS was effective on the former only. CS had more impact on superior quality straw while contrary was true with ULS. Although GLS improved intake and degradability of untreated and urea treated straws, its bulkiness affected the straw intake compared to other supplements.

• 농약과학회지
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• 제2권1호
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• pp.53-58
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• 1998

Dicamba의 부작용을 최소화하고, 약효지속효과를 증진하며, 유효성분의 용출속도를 조절할 수 있는 전분을 중합매체로 한 방출조절형 dicamba 입제를 제조하여 기존의 dicamba 액제와 용탈, 토양잔류 및 휘산을 비교하였다. 이들 방출조절형 dicamba 입제는 dicamba 액제에 비하여 약 50% 이상 용탈이 감소되었으며, 토양잔류는 양토에 처리된 dicamba 입제의 토양중 반감기가 $50{\sim}51$일 이었으며, 사양토에 처리하였을때는 $50{\sim}58$일 이었다. 한편 양토 및 사양토에 처리된 dicamba 액제는 각각 24일과 22일 이었다. 또한 dicamba의 휘산성은 방출조절형 dicamba 입제가 dicamba 액제에 비하여 약 10배의 휘산억제효과가 있었다.

• 한국유기농업학회지
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• 제25권2호
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• pp.461-473
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• 2017

Total mixed ration (TMR) including concentrate diet and roughage together have been used for the ruminant animal. Relatively high concentrations of moisture and water soluble carbohydrate are representative feature of TMR. Those moisture and water can also provide a niche for bacterial growth. Therefore, a possible fermentation of TMR induced by micro-organism is generally accepted. The present study hypothesized that different lactic acid bacteria could alter fermentation of TMR and subsequently rumen fermentation. Three lactic acid bacteria, Lactobacillus paracasei (A), L. plantarum (B) and L. parabuchneri (C), were employed and 7 treatments under full factorial design were compared with control without inoculation. TMR for dairy cow was used. Significant alterations by treatments were detected at lactic acid and butyric acid contents in TMR (p<0.05). Treatment AC (mixture of A and C) and BC (mixture of B and C) showed great lactate production. Great butyrate production was found at treatment C. At in vitro rumen fermentation, treatments B, C and AB (mixture of A and B) showed significantly great total gas production (p<0.05). All treatments except treatments B and AB, showed less dry matter digestibility, significantly (p<0.05). Total volatile fatty acid production at treatment AC was significantly greater than others (p<0.05). In individual volatile fatty acid production, treatment AB and AC showed great acetate and propionate productions, significantly (p<0.05). This study investigated correlation between organic acid production in TMR and rumen volatile fatty acid production. And it was found that butyric acid in TMR had significant negative correlation with acetate, propionate, total volatile fatty acid, AP ratio and dry matter digestibility.

• 한국식생활문화학회지
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• 제36권1호
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• pp.84-91
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• 2021

The oriental plum (Prunus salicina) is one of the most popular fruits in Korea due to its sweet taste and pleasant aroma. The objective of this study was to analyze the quality characteristics and antioxidant activities of a puree made using plums stored at low-temperatures. The quality characteristics were determined by estimating total soluble solids (TSS, °Brix), titratable acidity (TA, % citric acid), TSS/TA ratio, pH, colors, sugar content, and sensory profiles. The antioxidant effects were estimated by total polyphenol and flavonoid content and radical scavenging activity. The results showed that the plum puree containing both the flesh and the peel had markedly higher red coloration (a⁎ value) than the puree without the peel, while yellow coloration (b⁎ value) and lightness (L⁎ value) were lower in the puree without the peel than with the peel. The sensory qualities including the plum taste and flavor, texture as well as overall acceptance showed no significant variation between the samples. Meanwhile, the total polyphenol/flavonoid content and radical scavenging activities were significantly improved by the presence of fruit peel and by frozen storage. These findings suggest that frozen plums could be a suitable ingredient for making a puree and concentrate for the food manufacturing industry.

• Journal of Microbiology and Biotechnology
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• 제32권5호
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• pp.582-593
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• 2022

Among abiotic stresses in plants, drought and chilling stresses reduce the supply of moisture to plant tissues, inhibit photosynthesis, and severely reduce plant growth and yield. Thus, the application of water stress-tolerant agents can be a useful strategy to maintain plant growth under abiotic stresses. This study assessed the effect of exogenous bio-based 2,3-butanediol (BDO) application on drought and chilling response in tomato and turfgrass, and expression levels of several plant signaling pathway-related gene transcripts. Bio-based 2,3-BDOs were formulated to levo-2,3-BDO 0.9% soluble concentrate (levo 0.9% SL) and meso-2,3-BDO 9% SL (meso 9% SL). Under drought and chilling stress conditions, the application of levo 0.9% SL in creeping bentgrass and meso 9% SL in tomato plants significantly reduced the deleterious effects of abiotic stresses. Interestingly, pretreatment with levo-2,3-BDO in creeping bentgrass and meso-2,3-BDO in tomato plants enhanced JA and SA signaling pathway-related gene transcript expression levels in different ways. In addition, all tomato plants treated with acibenzolar-S-methyl (as a positive control) withered completely under chilling stress, whereas 2,3-BDO-treated tomato plants exhibited excellent cold tolerance. According to our findings, bio-based 2,3-BDO isomers as sustainable water stress-tolerant agents, levo- and meso-2,3-BDOs, could enhance tolerance to drought and/or chilling stresses in various plants through somewhat different molecular activities without any side effects.