• Title/Summary/Keyword: Storage duration

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Effects of Different Feeding Regimes on Deer Meat (Venison) Quality Following Chilled Storage Condition

  • Kim, Kwan Woo;Park, Hyung Soo;Lee, Sung Soo;Yeon, Seong Heum;Cho, Chang Yeon;Kim, Sang Woo;Lee, Jinwook
    • Food Science of Animal Resources
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    • v.37 no.4
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    • pp.511-517
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    • 2017
  • This study was conducted to investigate the effect of different feeding regimes on the quality of deer meat (venison) following storage at $4^{\circ}C$ for various durations. Twelve 5-year-old elk stags about 350 kg were stratified by weight and randomly assigned to one of four dietary treatments (three elk stags per treatment). The dietary treatments consisted of a feeding concentrate of 1.5% of body weight (T1), feeding concentrate of 1.8% of body weight (T2), feeding concentrate ad libitum (T3), or a home-mixed ration ad libitum (T4). The pH values of deer meat were not significantly different among treatment groups but were affected by duration of storage. Cooking loss increased under T4 treatment with increasing storage time at $4^{\circ}C$ (p<0.05). Increased storage time also resulted in significant decreases in shear force under T2 and T3 treatment compared to that under other dietary treatments (p<0.05). Lightness ($L^*$), redness ($a^*$), and yellowness ($b^*$) parameters were not significantly different among treatment groups, but lower values of $a^*$ and $b^*$ were observed under T1 and T4 treatment with increasing durations of storage (p<0.05). The chemical and fatty acid composition had no significantly different among treatments. Therefore, meat quality was most affected by increased storage time at $4^{\circ}C$. These results may serve as the basis for further study of deer meat (venison) from Korea.

Estimation of Storage Capacity for CSOs Storage System in Urban Area (도시유역 CSOs 처리를 위한 저류형시스템 설계용량 산정)

  • Jo, Deok Jun;Lee, Jung Ho;Kim, Myoung Su;Kim, Joong Hoon;Park, Moo Jong
    • Journal of Korean Society on Water Environment
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    • v.23 no.4
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    • pp.490-497
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    • 2007
  • A Combined sewer overflows (CSOs) are themselves a significant source of water pollution. Therefore, the control of urban drainage for CSOs reduction and receiving water quality protection is needed. Examples in combined sewer systems include downstream storage facilities that detain runoff during periods of high flow and allow the detained water to be conveyed by an interceptor sewer to a centralized treatment plant during periods of low flow. The design of such facilities as stormwater detention storage is highly dependant on the temporal variability of storage capacity available (which is influenced by the duration of interevent dry periods) as well as the infiltration capacity of soil and recovery of depression storage. As a result, a continuous approach is required to adequately size such facilities. This study for the continuous long-term analysis of urban drainage system used analytical probabilistic model based on derived probability distribution theory. As an alternative to the modeling of urban drainage system for planning or screening level analysis of runoff control alternatives, this model have evolved that offer much ease and flexibility in terms of computation while considering long-term meteorology. This study presented rainfall and runoff characteristics of the subject area using analytical probabilistic model. This study presented the average annual COSs and number of COSs when the interceptor capacity is in the range $3{\times}DWF$ (dry weather flow). Also, calculated the average annual mass of pollutant lost in CSOs using Event Mean Concentration. Finally, this study presented a decision of storage volume for CSOs reduction and water quality protection.

Effects of gelatin and oxytocin supplementation in a long-term semen extender on boar semen quality and fertility potential

  • Vibuntita Chankitisakul;Nalinee Tubtimtong;Wuttigrai Boonkum;Thevin Vongpralub
    • Animal Bioscience
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    • v.37 no.2
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    • pp.210-217
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    • 2024
  • Objective: This study investigated the efficacy of different concentrations of gelatin supplementation in long-term semen extender on boar semen quality during storage for 10 days at 17℃. Additionally, oxytocin was added to stored semen to enhance fertility. Methods: In Experiment 1, boar semen was collected, diluted with gelatin at concentrations between 0% and 2.5% (w/v) and mixed with a semen extender. Then, it was kept in a refrigerator at 17℃ and stored for 10 days. In Experiment 2, the sperm quality was examined after adding 0, 5, and 10 IU oxytocin per artificial insemination dose to the most effective semen extender from Experiment 1 and placing it in a refrigerator at 17℃ for 10 days. In Experiment 3, the fertility potential in terms of non-return rate and litter size was determined using the most effective solid-stored semen supplemented with oxytocin. Results: The results indicated that sperm quality decreased with increasing storage time (p<0.05). The sperm quality in terms of total motility, progressive motility, and viable sperm with intact acrosomes and high mitochondrial potential was the highest with 1.5% gelatin supplementation (p<0.001) on all days of storage. Treatment with oxytocin did not affect sperm quality (p>0.05). The non-return rate and litter size after insemination with semen supplemented with 1.5% gelatin and 10 IU of oxytocin after 8 to 10 days of storage were comparable to those of the control group (p>0.05). Conclusion: A semen extender as a solid medium supplemented with 1.5% gelatin successfully preserved boar semen for a long storage duration. Treatment with oxytocin did not affect sperm quality. In addition, the fertility capacity using 1.5% gelatin with 10 IU oxytocin and stored for 8 to 10 days was acceptable and comparable to that of short-term storage.

Effect of Storage Temperature on Fruit Quality Attributes and Storage Disorders in Cold-stored 'Sangjudungsi' Persimmon Fruit (저온저장 온도가 '상주둥시' 감의 과실품질 및 저장장해 발생에 미치는 영향)

  • Yoo, Jingi;Kang, In-Kyu;Park, Jun-yeun;Kim, Kyoung-ook;Win, Nay Myo;Ryu, Seulgi;Kim, Dae Hyun;Choung, Myoung-Gun;Lee, Jinwook
    • Journal of Bio-Environment Control
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    • v.25 no.4
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    • pp.262-269
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    • 2016
  • 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 $3^{\circ}C$ 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 ($L^*$, $a^*$, $b^*$) 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 ($3^{\circ}C$) 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.

Effects of Transport Duration on Viability of In Vitro Produced Korean Native Cattle Embryos (한우 체외수정란의 이동 소요시간이 생존율에 미치는 영향)

  • 박희성
    • Journal of Embryo Transfer
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    • v.12 no.3
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    • pp.307-313
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    • 1997
  • Experiments were conducted to assess the effect of quality and viability of bovine blastocysts derived from in-vitro culture(IVC) of in vitro matured and fertilized(IVM-IVF) oocytes during their transport 2 hours. Follicular oocytes were collected form ovaries obtained at a slaughterhouse and were cultured for 24 hours in TCM-199. The IVM oocytes were fertilized in vitro with caudal epididymis spermatozoa. Fertilized oocytes were cultured for 7 to 9 days, and embryos that developed to the blastocyst stage were used for the experiment. The blastocysts, packed in straws with storage medium that consisted TCM-199 with HEPES equilibratd in air and supplemented with 10% FCS were transported at 39~(2.0 h). The quality of blastocysts was assessed and ranked as A(excel-lent), B(Good), fair or poor after transportation. The percentages of A and B grade blastocysts after transport duration for < 1 hours(97.7%) were similar to the result from transport duration for 1~2 hours (92.9%) and 2~3 hours(89.6%), but significantly(P<0.05) higher than transpot duration for 3~4 hours(76.3%). The percentages of A and B grade blastocysts after transport duration for two hours from developed blastocyst at 7day(100%) and 8day(85.0%) were higher 9day(96.6%) and >9day (40.0%). And early to expanded blastocyst produced in vitro were transferred to recipient cow by additional embryos at 7 and 8th day after AI. Three of them were pregnant to term and produced four twin calves, and two calves was premature birth. The gestation lengths of male to female and female to female twin were 282 and 281 days, respectively. And birth weight of twin calves were male to female(22.Skg) and female to female twin(20.3Okg), respectively.

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Storm-Water CSOs for Reservoir System Designs in Urban Area (도시유역 저류형 시스템 설계를 위한 CSOs 산정)

  • Jo, Deok-Jun;Kim, Myoung-Su;Lee, Jung-Ho;Park, Moo-Jong;Kim, Joong-Hoon
    • Proceedings of the Korea Water Resources Association Conference
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    • 2005.05b
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    • pp.1199-1203
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    • 2005
  • Combined sewer overflows(CSOs) are themselves a significant source of water pollution. Therefore, the control of urban drainage for CSOs reduction and receiving water quality protection is needed. Examples in combined sewer systems include downstream storage facilities that detain runoff during periods of high flow and allow the detained water to be conveyed by an interceptor sewer to a centralized treatment plant during periods of low flow. The design of such facilities as stormwater detention storage is highly dependant on the temporal variability of storage capacity available(which is influenced by the duration of interevent dry periods) as well as the infiltration capacity of soil and recovery of depression storage. As a result, a contiunous approach is required to adequately size such facilities. This study for the continuous long-term analysis of urban dranage system used analytical Probabilistic model based on derived probability distribution theory. As an alternative to the modeling of urban drainage system for planning or screening level analysis of runoff control alternatives, this model have evolved that offer much ease and flexibility in terms of computation while considering long-term meteorology. This study presented rainfall and runoff characteristics or the subject area using analytical Probabilistic model. Runoff characteristics manifasted the unique characteristics of the subject area with the infiltration capacity of soil and recovery of depression storage and was examined appropriately by sensitivity analysis. This study presented the average annual COSs and number of COSs when the interceptor capacity is in the range 3xDWF(dry weather flow). Also, calculated the average annual mass of pollutant lost in CSOs using Event Mean Concentration. Finally, this study presented a dicision of storage volume for CSOs reduction and water quality protection.

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Studies on the Rancidity of Pacific Saury, Cololabis saira Kwamaegi on the Storage Temperatures and Durations (저장온도와 저장기간에 따른 꽁치과메기의 산패도)

  • Lee, Ho-Jin;Oh, Seung-Hee;Jeong, Ji-Suk;Choi, Kyoung-Ho
    • The Korean Journal of Food And Nutrition
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    • v.21 no.4
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    • pp.477-484
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    • 2008
  • The Pacific saury, Cololabis saira Kwamaegi, is a traditional local food of the Eastern sea area, centered around Pohang. It is well-recognized as being both tasty and nutritious. Nevertheless, bacterial contamination, excessive dryness, and compositional changes render this fish edible only during the winter months. Thus, to improve its storage capabilities, this study assessed the effects of storage material, type, temperature, and duration on compositional changes in Kwamaegi. The assessed samples were Kwamaegi which had been naturally dried for 15 days. The storage materials included an A-film, a self- developed multi-film made of polyethylene, polyamide, EVOH, and polyethylene, and a B-film made of polyethylene, nylon, polyethylene, nylon, and polyethylene. The B films were utilized after pressing and lamination. The storage types included one whole fish(1G), or 2 divided fish(2G), to increase eating convenience. The 2G type was the muscle portion divided vertically after discarding the jowl, skin, and internal organs. The storage temperatures were 0, -15 and $-30^{\circ}C$, and the storage durations were 2, 4, and 6 months. Among the lipid rancidities, acid value and peroxide value showed the highest level of initial rancidity at a storage temperature of $0^{\circ}C$ for 2 months. We noted no significant differences between storage materials. The lower the storage temperatures, the less acid and peroxide were generated. Between the storage types, 1G evidenced lower less acid values than 2G. The TBA values revealed a dramatic increase at a storage temperature of $0^{\circ}C$ for 2 months, whereas this rapid progress was not observed at storage temperatures of -15 and $-30^{\circ}C$. Along with the acid value and peroxide value, the samples stored at 0, -15 and $-30^{\circ}C$ evidenced significantly lower TBA values. The B-film evidenced a slightly lower TBA value than was observed in the A-film, but no significant differences were observed.

Effects of Storage Conditions on Quality Change after Storage of Deastringencied Persimmons (저장조건이 탈삽감의 저장 후 품질변화에 미치는 영향)

  • 정혜승;정헌식;이주백;성종환;최종욱
    • Food Science and Preservation
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    • v.8 no.1
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    • pp.1-8
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    • 2001
  • Effects of storage method and duration on the post-storage quality changes of deastringencied persimmons were investigated. Astringent persimmons(Diospyros kaki T. cv. Chungdobansi) were treated for 39 hours in 70% CO$_2$+5% O$_2$ at 25 $\^{C}$ for astringency removal, and then stored in CA(5%CO$_2$+3%O$_2$, 8%CO$_2$+3%O$_2$), MAP(0.06 mm LDPE film, 5.2%CO$_2$+6.8%O$_2$) and air at 0$\^{C}$ for 15, 45, 75 arnd 105 days. Subsequent to the storage, persimmons were held in air at 10$\^{C}$ for 4 days. The difference of firmness loss in relations to storage methods at O$\^{C}$ during holding at 10$\^{C}$ observed in fruits stored above 45 days at 0$\^{C}$, CA(8%CO$_2$+3%O$_2$) storage was more retarded the firmness loss than the others. Soluble solids during holding at 10$\^{C}$ trended to decrease in fruits stored above 75 days at 0$\^{C}$, CA and MAP storage were a little effective to keeping soluble solids. Titratable acidity during holding at 10$\^{C}$, decreased in fruits stored until 75 days at 0$\^{C}$ regardless storage methods. Sensory characteristics, color, hardness and overall acceptability of fruits stored in CA were significantly higher than those of fruits stored in MAP and air during shelf-life at 10$\^{C}$ after long-term storage at 0$\^{C}$ . These results show that the storage conditions had residual effect on the quality of deastringencied persimmons during shelf-life after long-term storage.

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Studies on Seed Germination of Miscanthus sinensis Native to Jeju Island (제주도 자생 참억새의 종자발아에 관한 연구)

  • Lee, Jong Suk;Han, Seung Won
    • Journal of the Korean Society of Environmental Restoration Technology
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    • v.10 no.1
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    • pp.9-15
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    • 2007
  • The study was conducted to find out the harvesting time, storage duration, cold treatment and sterilization on seed germination of Miscanthus sinensis. The optimum harvesting time of the Miscanthus seed in native to Jeju island was December. And the seed germination passible 3 years after harvesting. When the seeds had cold treatment, seed germination nate was 74% rather than 63% of non-treatment. For seed sterilization treatment, soaking in solution of Benomyl 7% during from 3 hours to 12 hours germinated 9% over. But the non-treatment on 24 hours treatment reduced the seed germination of Miscanthus sinensis.

Probabilistic Optimal Weekly Coordination of Thermal-Pumped Storage Power System based on the Maximum Principle (최대원리에 의한 화력-양수발전시스템의 확률적 운전시뮬레이션 모델)

  • Lee, Bong-Yong;Shim, Keon-Bo
    • Proceedings of the KIEE Conference
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    • 1991.07a
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    • pp.411-416
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    • 1991
  • Operation simulation is a key factor to evaluate investment and operation in a power utility. Probabilistic production simulation is of major concern. With pumped-storage plant, production simulation is not an easy task, because its economy should fully be exploited. In addition, usual operation interval is a week rather than a day. Most existing models are based on approximate production simulation such as adopting simple priority orders of generations. This study is based on the more elaborate model developed by authors. Further, a policy of weekly coordination is established based on the Maximum Principle. Chronological load curve instead of usual load duration curve is used and the accuracy in simulation is enhahced. Resulting economics are compared. Deviation between these two toad curve is shown.

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