Effect of Storage Temperature on Fruit Quality Attributes and Storage Disorders in Cold-stored ‘Sangjudungsi’ Persimmon Fruit

Jingi Yoo(유진기),In-Kyu Kang(강인규),Jun-yeun Park(박준연),Kyoung-ook Kim(김경욱),Nay Myo Win(나이묘위),Seulgi Ryu(류슬기),Dae Hyun Kim(김대현),Myoung-Gun Choung(정명근),Jinwook Lee(이진욱) (사)한국생물환경조절학회 2016 생물환경조절학회지 Vol.25 No.4

본 연구는 ‘상주둥시’ 감을 3개월동안 -1, 0.5, 3℃에 저장하면서 감 과실의 과실품질 변화와 저장장해 증상에 미치는 영향을 구명하고자 실시하였다. 저장온도에 따른 감 과실의 에틸렌 발생량은 저장온도가 낮을수록 그 발생량이 낮았으나 호흡율은 영향을 받지 않았다. 과실의 경도는 모든 처리구들에서 저장기간이 길어지면서 감소하였고 저장온도가 높을수록 과실 경도의 저하는 더 빠르게 진행되었다. 또한 저장기간이 길어지고 저장온도가 높을 수록 과실의 연화가 급속히 진행되었다. 과실의 감모율도 저장온도가 높을수록 증가하였고, 가용성 고형물 함량도 저장온도가 낮을수록 더 높게 유지되었다. 감 과실의 과정부와 과실측면의 과피색 L<SUP>*</SUP>, a<SUP>*</SUP>, b<SUP>*</SUP> 값의 변화는 저장온도 -1℃와 0.5℃에서는 저장기간에 따른 차이를 거의 보이지 않았으나, 3℃처리구에서는 과피색의 변화가 현저히 적었다. 저장중 발생하는 생리장해증상인 과피흑변, 과실연화 및 부패정도는 온도가 높을수록 그 증상이 심하게 발생하여 과실품질이 현저히 감소하였다. The objective of this study was to evaluate the effect of storage temperature on fruit quality attributes and physiological disorders including peel blackening in ‘Sangjudungsi’ persimmon (Diospyros kaki Thunb.) fruit stored in air at -1, 0.5 or 3℃ for up to 3 months. Higher storage temperature reduced ethylene production but not respiration rate, compared with lower storage temperature. Flesh firmness decreased continuously as storage time passed but firmness was reduced rapidly in the fruits stored at higher storage temperature. Fresh weight loss increased at higher storage temperatures. Soluble solids content was higher at lower storage temperature than at higher storage temperature. All color variables (L<SUP>*</SUP>, a<SUP>*</SUP>, b<SUP>*</SUP>) were reduced by lower storage temperature, compared with higher storage temperature, regardless of tissue regions. Fruit softening increased as storage duration advanced and with the increase in storage temperature. Results indicated that the ‘Sangjudungsi’ persimmon fruits stored at higher storage temperature (3oC) could not retain fruit quality properly on account of lower flesh firmness and higher incidence of peel blackening and fruit decay, compared with lower storage temperature.

One-pot synthesis and characterization of silver/polyphenylsilane hybrid nanocomposites.

Kim, Bo-Hye,Kim, So-Yeun,Kim, Myoung-Hee,Woo, Hee-Gweon,Kim, Do-Heyoung,Jun, Jin,Sohn, Honglae American Scientific Publishers 2008 Journal of Nanoscience and Nanotechnology Vol.8 No.10

<P>The synthesis and characterization of spherical silver/polyphenylsilane (PPS) hybrid nanocomposites were carried out. A one-step conversion of metallic salts to stable metal nanoparticles was possible by a simple and mild PPS-mediated method. TEM (transmission electron microscopy) and FE-SEM (field emission scanning electron microscopy) data confirm the formation of the hybrid nanocomposites in which large numbers of silver nanoparticles (< 30 nm) are dispersed throughout the PPS matrix. XRD (X-ray diffraction) patterns are consistent with that for fcc-typed silver. The size and processability of such nanoparticles depend on the metal to PPS ratio. The PPS with Si-H functionalities play an important role as a reducing agent and as a stabilizing agent in the formation of the silver nanostructures. In the absence of the polymer, most of the silver particles underwent macroscopic precipitation.</P>

대구지역 경부선 철도주변의 소음실태와 특성

민경섭,송희봉,박연준,한개희,이명숙,김용혜,홍성희,권기홍 한국환경과학회 1997 한국환경과학회지 Vol.6 No.1

We investigated and analysed the actual conditions and characteristics of railroad noise levels for 17 sites in the vicinity of the Seoul-Pusan Line. The results are summarized. as follows : 1) Railroad noise level ranged to 64∼74 L_eq dB(A) at day time and ranged to 60∼72 L_eq dB(A) at night time. 2) Increased night noise level depend on the increase of trains passing at night time. 3) The major factor of increased noise level in the vicinity of stations are using loudspeakers and stream whistle on trains. 4) Decreased effect of noise according to distance is able to be described quantitatively using regression equations of multiplicative model. L_eq=78.59 X^-0.056 n=25, r=-0.994, s.e.=1.007 P_av =105.68X^-0073, n =25, r =-0.997, s.e. = 1.007 Also increased and decreased effect of noise according to floor in apartment is able to be described quantitatively using regression equations of multiplicative model. L_eq = 64.238 X^0.0567, n = 39, r = 0.787, s. e. = 1.004 P_av. = 79.963 X^0.0254 n = 39, r = 0.689, s. e. = 1.056 5) Average noise level in high floor is over 70L_eq dB(A) at day and night time, so more detailed soundproofing countermeasured in high floors apartment is required.

국내산 원유 중의 구리 및 망간 함량의 계절적 변화

곽병만,전연명,김강섭,이기웅,안장혁,장치훈,Kwak Byung-Man,Jun Yeun-Myoung,Kim Kang-Seob,Lee Ki-Woong,Ahn Jang-Hyuk,Chang Chi-Hoon 한국축산식품학회 2006 한국축산식품학회지 Vol.26 No.2

본 연구는 2003년 7월부터 2004년 6월까지 약 1년에 걸쳐 국내의 충청도 및 전라도지역에서 집유한 원유에 함유된 구리 및 망간의 함량을 계절별로 정량한 결과이다. 원유 중 구리와 망간 함량은 계절에 따른 변화가 크지 않았으며, 구리의 경우, 봄($3월{\sim}5윌$)은 $10.10{\sim}26.00{\mu}g/100 mL$로 평균 $13.79{\mu}g/100 mL$, 여름($6윌{\sim}8월$)은 $5.06{\sim}15.41{\mu}g/100 mL$로 평균 $10.17{\mu}g/100 mL$, 가을($9월{\sim}11월$)은 $5.04{\sim}19.70{\mu}g /100 mL$로 평균 $10.70{\mu}g/100 mL$, 겨울($12월{\sim}2월$)은 $6.96{\sim}17.80{\mu}g/100 mL$로 평균 $12.11{\mu}g/100 mL$로 나타났다. 한편 망간의 경우는 봄($3월{\sim}5월$)은 $3.00{\sim}8.30{\mu}g/100 mL$로 평균 $4.87{\mu}g/100mL$, 여름($6월{\sim}8월$)은 $2.30{\sim}6.44 {\mu}g/100mL$로 평균 $3.75{\mu}g/100 mL$, 가을($9월{\sim}11월$)은 $2.81{\sim}6.04{\mu}g/100mL$로 평균 $3.82{\mu}g/100 mL$, 겨울($12월{\sim}2월$)은 $2.25{\sim}9.02 {\mu}g/100 mL$로 평균 $4.48{\mu}g/100 mL$로 나타났다. 대체적으로 봄에 가장 높고 여름에 가장 낮은 경향을 보였으나, 계절에 따른 통계상의 유의적인 차이는 인정할 수 없었다. This study was conducted by using the ICP-AES (Inductively Coupled Plasma - Atomic Emission Spectrometry) to investigate the seasonal changes of copper and manganese content in the raw bovine milk. From July 2003 to June 2004, the milk samples were collected from the two geographical locations, Chungcheong-do and Jeolla-do, in Korean peninsula. Copper (Cu) content was determined in the range of min. 10.10 to max. 21.00 ${\mu}g$/100 mL (13.79 ${\mu}g$/100 mL) in spring, 5.06 to 15.41 (10.17) in summer, 5.04 to 19.70 (10.70) in autumn and 6.96 to 17.90 (12.11) in winter. For manganese (Mn), 3.00 to 8.30 (4.87) in spring, 2.30 to 6.44 (3.75) in summer, 2.81 to 6.04 (3.82) in autumn and 2.25 to 9.02 (4.48) in winter. Those data have shown that levels of copper and manganese was relatively constant but higher in Spring than other seasons, suggesting that the levels were not affected by seasons and different locations in Korea.

DNA 교차 오염 방지 기능을 가진 돼지 인플루엔자바이러스 감별진단용 one-step multiplex RT-PCR 진단법

김희정 ( Hee Jung Kim ),김은미 ( Eun Mi Kim ),신연경 ( Yeun Kyung Shin ),송재영 ( Jae Young Song ),김성희 ( Seong Hee Kim ),이경기 ( Kyoung Ki Lee ),이명헌 ( Myoung Heon Lee ),김영화 ( Young Hwa Kim ),박준철 ( Jun Cheol Park ) 한국동물위생학회 2014 한국동물위생학회지 (KOJVS) Vol.37 No.4

In this study, we developed a cost and time saving one-step multiplex RT-PCR for the simultaneous detection and differentiation of swine influenza viruses (SIV) and 2009 pandemic influenza H1N1 virus (pH1N1). The one-step multiplex RT-PCR using four sets of primer was confirmed to be capable of detection of all SIV subtypes and differential diagnosis of major SIV subtype H1, H3 and pH1N1 on individual or mixed viral culture samples. The sensitivity of the multiplex RT-PCR was determined to be at least 2-6 HA/25 μL of the presented SIVs, providing sufficient efficacy for a routine SIV monitoring in diagnostic laboratories. In addition, compared with the conventional RT-PCR methods that cannot avoid the carryover DNA contamination, the developed RT-PCR applied with the uracil DNA glycosylase (UNG) system was proven to prevent a false positive reaction by carryover contamination of the pre-amplified DNA. In conclusion, the one-step RT-PCR with UNG system could be applicable to detect and differentiate of SIV from the viral cultures without worry of carryover DNA contamination in clinical laboratories.

흰꽃 나도 샤프란(Zephyranthes candida H<SUB>ERB.</SUB>)의 인공번식

박윤점(Park Yun Jum),서춘순(Seu Choon-Soon),정주연(Chung Ju-Yeun),김명선(Kim Myoung Sun),윤태준(Yun Tae Jun) 한국원예학회 1999 원예과학기술지 Vol.17 No.2

마우스 비장세포에서의 Polychlorinated Biphenyls(Aroclor 1234)의 면역 독성

반상자(Sang Ja Ban),안광수(Kwang Soo Ahn),김주환(Ju Hwan Kim),임종준(Jong Jun Lim),김수연(Soo Yeun Kim),기미경(Mee Kyung Kee),이명숙(Myoung Sook Lee),조수열(Soo Yeul Cho),김영훈(Young Hoon Kim),김지윤(Ji Yoon Kim),이유경(Yoo Kyoung L 한국독성학회 2003 Toxicological Research Vol.19 No.4

Polychlorinated biphenyls (PCBs) has been widely used as plasticizer, insulator, lubricant, paint and ink. The persistence of PCBs in the environment and their bioaccumulation in living<br/> organism make a raise concerns regarding their toxic effects in immune system and subsequent effects on human health. However little has been known about effect of PCB, an endocrine disrupter,<br/> on splenocytes. In this study, for identifying the effect on the organs and immune cell of mice by the concentration and time of commercial PCB mixture (Aroclor 1254), each 3 mice were tested at the concentration of 3, 30, 300, 1,000 mg/kg respectively, and their organ's weight were measured in 4, 7, 14 days, respectively. Also according to concentration and time, PCB was evaluated for the effects on splenocyte viability and lipopolysaccaride (LPS) and concanavaline A (Con A)-induced splenocyte proliferation on mice spleen. In liver and lung, there were significantly defferent by concentration and time of PCB (p<0.0001). In respect of concentration of PCB, no significant effects on mice's liver by Aroclor 1254 concentration below than 300 mg/kg were observed except at the concentration of 1,000 mg/kg doses (p<0.0001). But there was not significant different change in mice spleen by concentration and time of PCB (p=0.2206) and the mode of weight change of spleen was different to of liver and of lung. Viabilities of splenocytes were decreased following treatment with high concentration of PCB. Also, LPS and Con A-induced cell proliferations were decreased by Aroclor 1254 at 1,000 mg/kg. These data suggest that Aroclor 1254 is the immunotoxic compound that may have an effect on mouse immune system.