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강국희,전태욱,정충일 성균관대학교 생명과학자원연구소 1996 生命資源科學硏究 Vol.3 No.1
A case study was conducted on decrease of bacteria and somatic cell count in the raw milk for the raw milk quality improvement. This study was carried on SK dairy farm in Suwon city that had 4 dairy milking cows. The experiment was tested on 2 cows each for control group and treatment group respectively. Criteria of evaluation on raw milk quality were number of total bacteria, Psychrotrophic bacteria, thermophilic bacteria, coli group and somatic cells. All the cows were applied the same feeding system for 86 days (Mar, 14∼Jane, 7) The results obtained were as follows : Milk contents were fat 3.1%∼4.19% for control group and 3.21%∼4.76% for treatment group; protein 2.65%∼4% for control and 3.04%∼4.37% for treatment; carbohydrate 4.09%∼4.86% for control and 4%∼4.94% for treatment. SNF 7.78%∼9.45% for control and 8.05%∼9.7% for treatment. There was no significant difference in milk contents between control group and treatment. The number of total bacteria was about 8.0×10 exp(5)/ml for control group and 1.0 × 10 exp(5)/ml for treatment group. Psychorotophic bacteria were distributed from 1.79 × l0P/ml to 9.55×10 exp(5) /ml for control group and 5.4×10 exp(3)/ml to 8.95×10 exp(5)/ml for treatment group. Thermophilic bacteria indicated from 6.0×10 exp(3)/ml to 8.95×10 exp(5)/ml for control group, and 5.5×10 exp(2)/ml to 1.1×10 exp(4)/ml for treatment group. The coli group indicated about from 1.6×10 exp(3)/ml to 2.3×10 exp(4)/ml for control group and 1.0×10 exp(2)/ml to 2.9×10 exp(4)/ml for treatment group. The number of somatic cells were 1,534,000(±234,012) for cow No. 2; 197,000 (±59,681) for cow No. 4; 4,240,000 (±1,094,459) for cow No. 9; 951,000 (±784,990) for cow No. 13 respectivley during the experiment period. The somatic cell count did not decrease by the sanitary handling on cows and the tools during experiment period.
Tae Woog Jeon,Cheorun Jo,Myung Gon Shin,Bo Sook Cha,Mi Jung Kim,Myung-Woo Byun 한국식품영양과학회 2003 Preventive Nutrition and Food Science Vol.8 No.1
Effects of irradiation on color removal, tyrosinase inhibition, xanthine oxidase inhibition and nitrite scavenging capacity of Lonicera japonica extracts were evaluated. Lonicera japonica extracts were irradiated at 10, 20, and 30 kGy. Hunter color L^*- and a^*-values increased but b^*-values decreased dose-dependently following irradiation. The extracts were potent inhibitors of tyrosinase and xanthine oxidase. Tyrosinase inhibition was higher in the irradiated sample than non-irradiated, and subsequently increased with increasing irradiation doses. The extracts had a higher inhibitory effect against xanthine oxidase, and the effect was not changed by irradiation. Nitrite scavenging capacity was the highest in the extract at pH 1.2, and was not significantly affected by irradiation. These results indicate that gamma irradiation may not influence the biological activities of Lonicera japonica extracts when irradiated up to 30 kGy. Furthermore, color of the extracts can be improved to have improved applicability for the food and cosmetic industries without any adverse change in biological functions.
감마선 조사가 오미자의 생리 활성과 색상 변화에 미치는 영향
전태욱(Tae-woog Jeon),박지혜(Ji-Hye Park),신명곤(Myung-Gon Shin),김기혁(Kee-Hyuk Kim),변명우(Myung-Woo Byun) 한국식품영양과학회 2003 한국식품영양과학회지 Vol.32 No.1
오미자 추출물을 감마선 조사하여 색택 개선, 항산화성, 항균성에 대하여 실험하였다. 오미자의 추출 방법은 열수추출, ethanol, methanol 그리고 acetone으로 추출하였으며, 감마선 조사는 10, 20 그리고 30 kGy로 하였다. 감마선 조사 선량이 증가할수록 명도(Hunter color L-value)의 경우 비조사구보다 조사구가 월등히 밝은 색을 보였으며, 적색도(a값)와 황색도(b값)는 감소하는 결과를 보여줬다. TBA가 분석 결과는 ethanol로 추출한 경우 가장 높은 항산화력을 확인하였다. 전자 공여능의 측정 결과는 열수 추출한 경우에 비조사구와 조사구 모두 가장 활성이 높았으며 ethanol과 methanol의 경우에는 비조사구와 비슷한 활성을 보여줬다. 오미자 추출 용매별 및 감마선 조사 선량에 따른 항균효과는 B. subtilis, B. natto, B. megaterium, S. aureus, Sal. typhymurium과 E. coli 등 모든 균주에 대해 아주 높은 항균 활성을 나타내었다. 또한 오미자 추출물은 30 kGy까지 감마선을 조사하여도 추출물의 생리활성에는 영향을 미치지 않았다. 따라서 감마선 조사 기술은 천연 식품 보존제 및 화장품 원료로서 사용하기 위한 오미자 추출물의 색택 개선에 활용 가능성이 높을 것으로 기대된다. This study was carried out to examine the effects of gamma irradiation on the color removal, antioxidation, DPPH radical scavenger, and antimicrobial activity of Schizandra fructus extracts by different solvents. Schizandra fructus was extracted by hot water, ethanol, acetone and methanol, and the extracts were irradiated 10, 20 and 30 kGy with gamma rays. Hunter color L-value was increased by irradiation in a dose-dependent manner, resulting in brighter color for all solvents used. The a and b values were decreased by irradiation in a dose-dependent manner. Antioxidant activity of the ethanol extract of Schizandra fructus against soybean oil was the highest. The free radical scavenging activity was the strongest in hot water extract. All solvent extracts from Schizandra fructus had the strongest antimicrobial activities to B. subtilis, B. natto, B. megaterium, S. aureus, Sal. typhymurium and E. coli. These results suggested that Schizandra fructus extracts have a strong potential as natural food preservatives and cosmetic raw materials. Furthermore, irradiation may not influence adversely on biological activites of the extracts when irradiated up to 30 kGy.
주박 추출물의 항균활성, 항산화 및 SOD 유사활성 효과
김태영 ( Tae Young Kim ),전태욱 ( Tae Woog Jeon ),여수환 ( Soo Hwan Yeo ),김상범 ( Sang Bum Kim ),김진숙 ( Jin Sook Kim ),곽준수 ( Joon Soo Kwak ) 한국식품영양학회 2010 韓國食品營養學會誌 Vol.23 No.3
The purpose of this study was to investigate antimicrobial, antioxidant, DPPH radical scavenging and SOD-like activity effect of Jubak(AFC) extract using hot water and ethanol solvent. All extracts from Jubak(AFC) had antimicrobial activities in the Bacillus subtilis, Staphylococcus aureus, Pseudomonas aeruginosa and Escherichia coli. Antioxidant activities of the Jubak(AFC) using soybean oil emulsion was confirmed to be higher in the extract using ethanol and hot water than control and the antioxidant was practically effective when concentration of the Jubak was 200 ppm. Scavenging effect of DPPH radical of Jubak extracts showed inhibition effect was above 80%. SOD-like activity were higher in hot water extracts than in ethanol extracts. If keeping up Jubak`s study, it could have potential as a cosmetic raw material. Additionally, Jubak could be expected as functional material in food by different extract method.
Kang, Tae Woog,Jeon, Su-Ji,Kim, Hye-In,Park, Jung Hyun,Yim, DaBin,Lee, Hye-Rim,Ju, Jong-Min,Kim, Man-Jin,Kim, Jong-Ho American Chemical Society 2016 ACS NANO Vol.10 No.5
<P>It has been of great interest to measure the activity of acetylcholinesterase (AChE) and its inhibitor, as AChE is known to accelerate the aggregation of the amyloid beta peptides that underlie Alzheimer's disease. Herein, we report the development of graphene oxide (GO) fluorescence-based biosensors for the detection of AChE activity and AChE inhibitors. To this end, GO was non-covalently functionalized with phenoxy-modified dextran (PhO-dexGO) through hydrophobic interaction; the resulting GO showed excellent colloidal stability and intense fluorescence in various aqueous solutions as compared to pristine GO and the GO covalently functionalized with dextran. The fluorescence of PhO-dex-GO remarkably increased as AChE catalyzed the hydrolysis of acetylthiocholine (ATCh) to give thiocholine and acetic acid. It was found that the turn-on fluorescence response of PhO-dex-GO to AChE activity was induced by protonation of carboxyl groups on it from the product of the enzymatic hydrolysis reaction, acetic acid. On the basis of its turn-on fluorescence response, PhO-dex-GO was able to report kinetic and thermodynamic parameters involving a maximum velocity, a Michaelis constant, and an inhibition dissociation constant for AChE activity and inhibition. These parameters enable us to determine the activity of AChE and the efficiency of the inhibitor.</P>
Dae Yeon Kim,Tae Hoon Kang,Hwa Young Heo,Tong Geon Lee,Min Jung Hong,Yong Jin Lee,Woog Bae Jeon,Man Bo Lee,Yong Weon Seo 한국작물학회 2008 한국작물학회 학술발표대회 논문집 Vol.2008 No.10
Most vacuolar proteins are synthesized on the endoplasmic reticulum (ER) as a proprotein precursor and then transported to vacuoles. In vacuoles, they are converted into the respective mature form. TaVPE1 and TaVPE2 were isolated from the cDNA library that was prepared from the wheat kernels at 16 and 18 days after fertilization (DAF). Additionally, putative TaVPEs (TaVPE3, TaVPE4) were isolated by inverse PCR (IPCR) using GrainGenes database. Each open reading frame (ORF) encodes 495, 497, 495, 456 amino acids, respectively. TaVPEs were closely related in respect to peptide comparisons and their sequence homologies were ranged from 84% to 93%. The TaVPE genes showed various expression patterns in response to exogenous treatment of phytohormones. The transcript of TaVPE1 was detected slightly and steadily after exposure to all phytohormones and the accumulation of TaVPE2 transcript was increased from 24 hours in NaCl treatment. The transcript of TaVPE3 was increased from 48 hours in response to H2O2 and decreased after exogenous application of ABA and salicylic acid. In case of TaVPE4, the transcript of TaVPE4 were weakly detected all time points of each phytohormone treatment.
Cho, Choa-Hyoung,Jeon, Tae-Woog,Kim, Myung-Kon The Korean Society for Applied Biological Chemisty 2012 Applied Biological Chemistry (Appl Biol Chem) Vol.55 No.1
Effects of gamma irradiation on color characteristic and biological activities of ethanol extract of Lonicera japonica irradiated at 0, 10, 20, and 30 kGy were investigated. Hunter color $L^*$- and $a^*$-value increased by irradiation in a dose-dependent manner, resulting in lighter color than the nonirradiated, whereas Hunter color $b^*$-value decreased with increasing irradiation dosage (p <0.05). The L. japonica extract showed inhibition effects against tyrosinase, xanthine oxidase, and nitrite-scavenging ability. Tyrosinase inhibition effect of L. japonica was higher in the gamma-irradiated sample than in the nonirradiated sample, and the effect was increased by increasing irradiation dosages. The L. japonica extracts had a higher inhibitory effect against xanthine oxidase, and the effect was not greatly changed by irradiation. Nitrite-scavenging activity was the highest in L. japonica extract at pH 1.2. Overall, the gamma irradiation may not greatly influence the xanthine oxidase inhibition effect and nitrite-scavenging ability of the L. japonica extract, except for the tyrosinase inhibition effect when irradiated up to 30 kGy.