• Journal of Korean Society of Forest Science
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• v.101 no.1
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• pp.46-52
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• 2012

The purpose of this study is to give ROI informations about management status and investment returns to someone who will newly cultivate lycium chinese miller or expand area of its cultivation. In this study, IRR, B/C Ratio and NPV is used for ROI analysis. We basically surveyed fifty two among Lycium Chinese Miller cultivation farmhouses in chief producing districts Chungnam Chungyang, Jeonnam Jindo in Korea from May until September in 2009. Hence, this study surveyed these farmers about production cost, management cost, input labors and materials, land price and etc. by working process to calculate production and operation cost. As the result of farm survey, average selling price of Lycium Chinese Miller is 15,000 won per kg at locals for five years. However, when 3% discount rate is applied, the result of the analysis is B/C Ratios 0.89, which shows unprofitable. Therefore, it is a possible baseline that price of Lycium Chinese Miller is at least 16,800 won per kg with 3.00% IRR and B/C Ratio is 1.00. It could be profitable with about 21.75% income ratio when price of Lycium Chinese Miller is 16,800 won per kg.

• Korean Journal of Medicinal Crop Science
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• v.7 no.2
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• pp.89-93
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• 1999

This study was carried out to investigate the effects of planting density, time and frequency of pinching on growth and yield of Lycium chinese Miller cultivated in vinyl house. This experiment was conducted at the experimental field of Cheong-yang Agriculture High School, Cheong-yang, Chung-nam province, in 1997 to 1998. The number of flowers, fruit setting number and dry weight of fruits per branch were increased as the spacings were wider, but the fruit yield per unit area was decreased up to the narrowest spacing plot of $60\;{\times}\;20cm$. The good results of growth status and fruit yield was obtained at the early pinching in May 5. As the more frequent pinching were treated, the more number of flowers and fruits per branch were produced, showing increase of fresh and dry yield, because of much more branches per plot.

• Food Science and Preservation
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• v.7 no.1
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• pp.68-73
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• 2000

These experiments were performed to investigate the safety of two herbs-Houttuynia cordata Thunberg and Lycium chinese Miller-irradiated with gamma-rays in respect of genotoxicity. Water extracts from the 10 kGy gamma-irradiated herbs were examined in two short -term in vitro tests ; (1) Salmonella typhimurium reversion assay (Ames test) in strain TA 98 and Ta100 and (2) Micronuclues test on clutured Chinese hamster ovary(CHO) cells. No mutagenicity was detected in the two assays with or without metabolic activation . From these results , the safety of the herbs irradiated with gamma-rays at practical doses could be revealed in further tests of genotoxicity in vivo, chronic and reproductive toxicity.

• Journal of Biosystems Engineering
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• v.36 no.4
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• pp.273-278
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• 2011

This study was carried out to define the optimum drying conditions for Lycium chinense Miller as a useful healthy food, because recently the cultivation area and yield of this fruit are increased. The experiments of two varieties were performed at the temperature of $45^{\circ}C$, $50^{\circ}C$, $55^{\circ}C$ and $60^{\circ}C$. The drying ratio was the slowest and quality was the best at the drying temperature of $45^{\circ}C$. The drying temperature was higher, drying ratio was more faster and the quality became worse. The difference of drying ratios between the varieties was insignificant. The energy consumption per hour was the minimum at the drying temperature of $45^{\circ}C$, but the total energy consumption was the maximum for the long drying time. Also, the energy consumption at the drying temperature $50^{\circ}C$, $55^{\circ}C$ and $60^{\circ}C$ was not very different from others. Considering the drying ratio, quality and energy consumption, the drying time of 36 hours at the drying temperature of $50^{\circ}C$ was the most optimum condition.

• KOREAN JOURNAL OF CROP SCIENCE
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• v.57 no.4
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• pp.409-417
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• 2012

This study was conducted to determine the variation of phenolic compounds in the leaf and stem of 131 accessions of Lycium chinesis Miller. The levels of total phenolic compounds in the leaf of L. chinesis ranged between 8.8 to $14.9mg\;g^{-1}$ and among them 60% of the accessions belong between 11.6 and $13.5mg\;g^{-1}$ for the content of phenolic compounds in the leaf. The accession CB03286-89 contained the highest total phenolic compounds among the accessions tested, which was 1.7-fold higher than that of the lowest content accession CBP03310-250. In the stem, the total phenolic compound of 131 accessions of L. chinesis ranged from 6.8 to $12.4mg\;g^{-1}$, showing slightly lower level than that in the leaf. The content of (+)catechin was highest in the leaf and stem of accession CB03286-89 and Japan No.1, respectively. Myricetin was detected in the leaf of seven accessions (i.e. Geumsan jaerae, Japan No.1, China collection No.1, CL32-13, CB04329-13, China collection No.12 and CB03286-89) and in the stem of five accessions (i.e., Japan No.1, China collection No.1, China collection No.12, CB03286-89 and 99797). Accessions had a great influence on the content of phenolic compounds. So, accessions-specific phenolic compound profiles might be helpful for commercial use or production of phenolic compounds in L. chinesis.

• KOREAN JOURNAL OF CROP SCIENCE
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• v.57 no.1
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• pp.22-28
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• 2012

This experiment was conducted to find out high antioxidant activity varieties of chinese matrimony from the 131 accessions which conserved at Cheongyang Gugija Experiment Station. The status of the 131 accessions were composed 21 of local varieties, 20 of introduced species and 90 of improved races. The anti-oxidant activity using DPPH and $IC_{50}$, 45 accessions out of 90 showed high activity in free radical scavenging ability as less than $200{\mu}g/m{\ell}$ in improved races, while nine and six accessions from the introduced species and local varieties, respectively. At the stem part, the highest three anti-oxidant varieties among 131 accessions are "C0148-94", "D0148-72" and "Cheongdae", while China collection 1 in leaf part. Since "Cheongdae" is the progeny from the "Cheongyang Jaerae 5" and "Myungan" and those two varieties, "C0148-94" and "D0148-72" are from the Myungan and Cheongdae, high anti-oxidant activity can be inherited in Chinese matrimony vine.

• The Korean Journal of Food And Nutrition
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• v.29 no.3
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• pp.301-306
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• 2016

Vitamin K (phylloquinone) is an essential cofactor in the synthesis of active blood-clotting factors II, VII, IX and X. Deficiency of vitamin K leads to inadequate activity of these factors, resulting in bleeding. In this study, we investigated vitamin $K_1$ content of agricultural products that are widely and specifically grown in Korea including 9 leaves and vegetables, 16 fruits, and 11 cereals and specialty crops. Vitamin $K_1$ analysis of the agro-samples was by a validated, modified, reversed phase-HPLC method with fluorescence detection after post-column derivatization. The vitamin $K_1$ content ranged from 1.83 to $682.73{\mu}g$/100 g in leaves and vegetables, 0.17 to $28.22{\mu}g$/100 g in fruits, and ND to $279{\mu}g$/100 g in cereals and specialty crops. Among the 36 samples, high content of vitamin $K_1$ were found in Gugija (Lycium chinense Miller) leaves (average $682.73{\mu}g$/100 g) and Hansan ramie leaves (average $423.12{\mu}g$/100 g); however, mushroom, amaranth and Chinese artichoke showed no detectable levels. The results of ourstudy provide reliable vitamin $K_1$ content of Korean grown agricultural products that expand nutritional information and food composition database.