• Horticultural Science & Technology
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• v.31 no.6
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• pp.790-797
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• 2013

During pear fruit development, calyx can abscise from fruitlet following petal fall. The calyx abscission varies with pear cultivars. The presence of calyx on pear fruit makes the fruit shape calyx end protruded. In the present study, the degrees of the calyx abscission were examined in 120 Southern-type Asian pear (Pyrus pyrifolia), 52 Nothern-type Asian pear (P. ussuriensis), and 34 European pear (P. communis) cultivars, and its inheritance was investigated using cross combinations between the Southern-type Asian pear cultivars showing different degrees of calyx abscission. Majority of the cultivars produced < 10% or > 90% calyx-perpetual fruit, but the cultivars producing both calyx-perpetual and -deciduous fruit were in minor frequency. The cultivars producing < 10% calyx-perpetual fruit were in higher frequency in Southern-type Asian, Nothern-type Asian, and European pears in that order, while those producing calyx-perpetual fruit were in higher frequency in European, Nothern-type Asian, and Southern-type Asian pears in that order. In the cross between the parents producing < 10% calyx-perpetual fruit, most of the $F_1$ seedlings also produced < 10% calyx-perpetual fruit. In the cross between the parents producing > 90% calyx-perpetual fruit, on the contrary, most of the $F_1$ seedlings also produced > 90% calyx-perpetual fruit. When the paternal parent produced < 10% calyx-perpetual fruit, most of the $F_1$ seedlings also produced < 10% calyx-perpetual fruit regardless of the degree of calyx abscission in the maternal parent. When the cross was between the maternal parent producing < 10% calyx-perpetual fruit and the paternal parent showing different degrees of calyx abscission, the $F_1$ seedlings showed similar degrees of the calyx abscission to those in the paternal parent. These results suggest that the characteristics of the calyx abscission is influenced more greatly by the paternal parent than by the maternal parent, and the calyx abscission in Southern-type Asian pears is a qualitative trait which is governed by dominant gene(s).

• Proceedings of KOSOMES biannual meeting
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• 2009.06a
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• pp.163-163
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• 2009

• KOREAN JOURNAL OF CROP SCIENCE
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• v.39 no.2
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• pp.193-197
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• 1994

This study was conducted to investigate optimal time for dissecting out embryos, effect of embryo size on plant generation, and kinds of media and environment in order to establish an effective bulbosum method. The optimum time for dissecting out the embryos for culture was found to be 17 days after pollination, when the size of embryos ranged from 0.8 to 1.0mm in length. Culture of embryos on B5 medium under continuous radiation was considered to be an efficient practice for production of barley hybrids. Haploid embryos, when compared to their counterpart diploid ones, were slower and fewer in plant development in culture.

• The Monthly Diabetes
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• s.151
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• pp.20-23
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• 2002

고혈압과 당뇨병은 성인에서 흔히 볼 수 있는 만성 질환으로서 특히 두 가지 질환을 함께 가지고 있는 경우가 많다. 고혈압과 당뇨병은 둘 다 심장질환, 뇌혈관질환, 신장질환 및 망막질환의 위험 인자로서 조기에 합병증을 발생시켜 유병률과 사망률을 증가시킨다. 통계에 의하면 당뇨병을 가지고 있는 사람은 없는 사람에 비해서 두 배 이상 고혈압이 발생하고 당뇨병 환자의 1/3에서 결국 고혈압이 발생하는데 특히 50세 이전에는 여자보다 남자에서 많이 발생하며, 50세 이후에는 남자보다 여자에서 많이 발생한다. 또한 백인에서 보다 흑인에서 두 가지 병을 가지고 있는 경우가 두 배 이상 많으며 경제적으로 빈곤할 수록 많이 발생한다고 한다. 당뇨병 환자에서는 고혈압이 유병률이나 사망률을 증가시키는 가장 중요한 요인인데 그 이유는 고혈압의 합병증, 즉 관동맥질환, 뇌졸중, 말초혈관질환, 신장질환 등의 발생과 성인 시력장애의 가장 흔한 원인으로 인정되고 있기 때문이다. 또한 당뇨병 환자에서도 고혈압 발생이 두 배로 많은데 당뇨병의 유형 및 기간, 신장질환 유무, 연령, 성별 및 인종에 따라 관련이 있다고 한다. 두 가지 질병이 다 같이 유사한 합병증을 일으켜 표적 장기에 손상을 주므로 두 질환을 가지고 있으면 이러한 합병증의 발병을 더욱 앞당기게 된다.

• Food Science and Preservation
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• v.10 no.4
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• pp.447-453
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• 2003

Causal factors related to the skin disorder such as black stains during cold storage of 'Niitaka' pear fruit are of great importance to solve the postharvest disorder problems. The morphological and biochemical changes observe of pear skin affected by different harvest times and storage environments. Occurrence rate of black stain in 'Niitaka' pear fruit was the highest in newspaper bagging with 75% among various bagging materials at harvest time because of the high relative humidity within the double layer paper bags. During cold storage, the rate was 54～100% in 30 $\mu\textrm{m}$ polyethylene (PE) film packaging. As the harvest time was postponed, the rate increasedduring cold stoinge. The into was 1.5 to 2.4 times higher in pears harvested in late September than in those harvested in early and mid October. There was no significant difference in occurrence of black stain fruit between the 30 and 50 $\mu\textrm{m}$ PE film bags. The causal fungus of the black stain pear was assumed as Gloeodes pomigena (Schweintz, 1920). The treatment of 0.1～0.5 ppm ozone gas prevented the occurrence of the pear fruit black stain until 180 days after cold storage. The ozone treatment on the affected fruit was also effective in preventing the progress of the black stain.

• Korean Journal of Plant Tissue Culture
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• v.26 no.1
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• pp.49-52
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• 1999

The influence of genotype and ecotype on the anther culture efficiency using hybrid of hot pepper (Capsicum annuum L.) was investigated. Anther culture efficiency was differently dependent on the genotype of parents. In the efficiency of embryo production, the cross combination using female parents with high embryo inducing ability was higher than those with low embryo inducing ability. It was shown that genotype and cytoplasm has effect on embryo production. Also the embryogenic ability was different according to ecotype of cross lines. The frequency of embryo production were the highest in Local variety $\times$ pimento cross combinations with 17.8~46.1 and the lowest in Pimento $\times$ Local variety cross combinations with 5.4~8.5%. Embryo inducing frequency was the middle value with 10.25~23.1% in Local variety $\times$ Tropical variety, Tropical variety $\times$ Local variety, Tropical variety $\times$ Pimento, and Pimento $\times$ Tropical variety cross combinations.

• The Monthly Diabetes
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• s.210
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• pp.8-10
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• 2007

대혈관 합병증은 중간크기 이상의 혈관(동맥 및 정맥)에서 동맥경화증이나 죽상경화증에 의한 변화로 발생하는 질환으로 관상동맥, 뇌혈관 및 말초혈관에 주로 발생하며 당뇨병환자의 주된 사망원인과 관련이 있기 때문에 매우 중요합니다. 당뇨병환자에서 대혈관 합병증인 죽상경화증은 가장 흔하고 중대한 만성합병증으로 관상동맥질환에 의한 관상동맥질환, 말초혈관질환 및 뇌혈관질환이 발생합니다. 발생률은 당뇨병이 없는 사람에 비해 2$\sim$5배 높으며 제 2형 당뇨병뿐만 아니라 제 1형 당뇨병환자의 주된 사망원인이 됩니다. 대혈관 합병증과 관련된 질환은 유병기간이 오래된 당뇨병환자에서 이환율, 장애 정도, 사망률 및 치료비용에 심각한 영향을 미칩니다. 당뇨병환자의 사망은 대부분이 대혈관 합병증과 관련이 있으며, 이중에서도 관상동맥질환으로 인한 사망률이 2$\sim$4배 증가합니다. 당뇨병성 만성합병증은 건강관리를 위한 지출에 상당히 영향을 미칩니다. 총 의료관리 예산의 약 25%가 당뇨병 및 당뇨병성 만성합병증의 치료에 지출됩니다. 위험요소를 감소시키거나 제거하면 만성합병증의 85%가 지연되거나 진행을 늦출 수 있습니다. 이것으로 미국의 경우 매년 170억 달러의 의료관리 예산을 절감할 수 있다고 합니다.

• Development and Reproduction
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• v.15 no.4
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• pp.301-308
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• 2011

The tolerance evaluation for abalone Haliotis discus hannai embryos was performed using different concentrations of cryoprotective agents (CPAs): dimethyl sulfoxide, ethylene glycol and propylene glycol added to 0.2 M sucrose, respectively. 4-cell, trochophore and veliger were exposed in each CPA with different concentration for 10, 20 and 30 minutes of immersion time. Developmental rates were increased with decreased concentration of every CPA and decreased immersion time, and differed from types of CPA. Developmental rates of veliger in all the CPAs were higher than those of 4-cell and trochophore. The developmental rates and larval activity indices in ethylene glycol were comparatively higher than those in other CPAs and the effective CPA and its concentration for the cryopreservation of the abalone embryos was suggested as 2.0 M ethylene glycol with equilibration time of 30 minutes.

• Proceedings of KOSOMES biannual meeting
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• 2009.06a
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• pp.165-165
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• 2009

• Journal of the Korea Academia-Industrial cooperation Society
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• v.13 no.5
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• pp.2219-2231
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• 2012

This study conducted to investigate incidence rate and association of serum lipid profiles with incidence of ischemic heart disease. Study subjects consisted of 417,642 adults aged 30 years and over, who underwent physical examination and responded to questionnaire from health examination center of 19 university general hospitals. Hazard ratio of risk factor for ischemic heart disease (IHD) were calculated by Cox's proportional hazard regression model adjusted for ages, BMI and lifestyle (drinking, smoking and exercising). For TC/HDL ratio, hazard ratio of IHD in male increased from 1.21 times to 1.84 times increase with TC/HDL ratio, and that in female also increased from 1.26 times to 1.86 times. For TG/HDL ratio, hazard ratio of IHD in male increased from 1.17 times to 1.49 times increase with TG/HDL ratio, and that in female also increased from 1.42 times to 1.97 times. For LDL/HDL ratio, hazard ratio of IHD in male increased from 1.26 times to 1.82 times increase with LDL/HDL ratio, and that in female also increased from 1.26 times to 1.68 times. In conclusion serum lipid indexes are the significant risk factors for cardiovascular diseases. The higher the concentration of TC, LDL and TG is, the lower the concentration of HDL is, hazard ratio for IHD increased. Ratio of TC/HDL, TG/HDL and LDL/HDL were also verified to be significant risk factors for IHD.