• Horticultural Science & Technology
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• v.31 no.2
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• pp.141-145
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• 2013

The aim of this study was to investigate the effect of two male cultivars of asparagus with low different chilling periods on bud breaking, relative spear growth rate, shoot number and yield. Four-month-old plants of two male cultivars of asparagus were dried to impose dormancy and placed in a coldroom at $5^{\circ}C$ to satisfy the chilling requirement for 0, 2, 4, and 6 weeks. After the specified chilling time, the pots were placed in greenhouse. The results showed that mean days to bud break of 'Jersey Giant' significantly decreased with an increasing chilling period from 0 to 6 weeks, but 'Jersey Supreme' was not affected. The relative spear growth rate of 'Jersey Supreme' was significantly stimulated by chilling compared to non-chilled plants. Shoot production and total spear weight of 'Jersey Supreme' tended to be greater than 'Jersey Giant' irrespective of chilling treatments. Following low temperature treatment, 'Jersey Supreme' showed shorter dormant period than 'Jersey Giant', faster growth of spear. The present study showed that asparagus male cultivar at duration of chilling treatment had an affirmative effect on bud breaking, spear growth rates, shoot number and yield of asparagus.

• Horticultural Science & Technology
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• v.33 no.5
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• pp.796-804
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• 2015

The present study investigated the plant growth characteristics, dormancy breaking, yield, and biological activity properties (contents of flavonoid and phenolic compounds, nitrite scavenging activity, and the survival rate of lung cancer) of four asparagus cultivars. It aimed to examine selection possibilities for high efficacy cultivar to promote biological activity in asparagus cultivation in South Korea. The results showed that the number of asparagus buds and root fresh and dry weight of 'Jersey Giant', 'Jersey Supreme', and 'NJ953' were higher than those of 'UC157' cultivar, and there were no differences in the number of roots. The dormancy breaking period of 'Jersey Supreme' was prolonged compared to the other cultivars. 'Jersey Giant' and 'NJ953' had more total spears, and greater spear diameter, and yield than other cultivars. Total flavonoid content was unaffected by cultivar and was higher in ethanol extraction than in hot water extraction. Total phenolic compound content was the lowest in 'NJ953' for both hot water and ethanol extracts, whereas in the ethanol extraction, 'UC157' had the highest, with $39.23mg{\cdot}L^{-1}$. 'Jersey Giant', 'Jersey Supreme', and 'NJ953' all showed greater than 70% nitrite scavenging activity. In the case of ethanol extraction, the survival rates of lung cancer in extracts from 'Jersey Giant', 'Jersey Supreme', and 'UC157' were lower than 'NJ 953' cultivar, regardless of extraction concentration. The survival rate of lung cancer was lower in hot water extraction than in ethanol extraction, so that the consumption of asparagus is also expected to be helpful in preventing lung cancer. The growth characteristics and biological activity effects of edible asparagus that were identified in the present study are expected to be useful in selection of high efficacy cultivars for biological activity and utilization.

• Korean Journal of Plant Resources
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• v.29 no.4
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• pp.495-503
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• 2016

In the present study, we investigated the plant growth characteristics and biological activity of four asparagus cultivars grown using two cultural methods and tested the possibility of domestic open field. The number of shoots, buds, roots, shoot and root fresh and dry weights, and total dry weight of the four asparagus cultivars grown in a plastic house were higher than those of the same cultivars grown in an open field. Of the cultivars grown in the open field, Jersey Giant had greater shoot number than the other cultivars. In plastic house cultivation, the number of buds in Jersey Supreme was greater than the other cultivars. The total flavonoid content of the Jersey Giant was greater than the other cultivars, but cultural method was unaffected. The total polyphenol contents in asparagus cultivars grown in the plastic house were higher than those of cultivars grown in the open field. The total polyphenol content of the Jersey Giant grown the plastic house was significantly higher than those of other cultivars. Antioxidant activity such as catalase (CAT) and peroxidase (POX) did not differ significantly with cultural methods and among the cultivars. Ascorbate peroxidase (APX) activity of asparagus cultivars grown in the open field was higher than that of cultivars grown in the greenhouse; the highest APX activity was detected in UC157. Thus, greenhouse cultivation is expected to improve plant growth characteristics and biological activities of asparagus cultivars; each cultural method should be considered when selecting a suitable cultivar for high yield and high bioactive compound content.

• The Korean Society of Law and Medicine
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• v.16 no.2
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• pp.3-26
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• 2015

Recently, Practicing of ghost surgery and duty of informed consent of doctors have become a big issue in the medical dispute and lawsuits. The ground of admitting the informed consent and the agreement(self-determination of patients) can be based on the dignity of man and the right to pursue his happiness guaranteed under Article 10 of the constitution in theory. However there are no explicit legal regulations on the duty of the informed consent and there is no substantive legal enactment on the informed consent, but there is a collision between self-determination of patients and the discretionary power of doctors. If the discretionary power on the duty of the informed consent was extended it may result in the infringement of the right of surgical patients, so called arbitrary medical treatment. Relating to this issue, New Jersey Supreme Court held that a patient has the right to determine not only whether surgery is to be performed on him, but also who shall perform it. Moreover it held that a surgeon who operates without the patient's consent engages in the unauthorized touching of another and, thus, commits a battery'. But there are no ghost surgery cases adopting battery theory in Korea, and professional negligence has been considered rather than the battery, regarding an absence of hostile intent to injure patient. Supreme Court of Korea held that a doctor who operates a medical procedure without the patient's valid prior consent based on wrong diagnosis commits professional negligence resulting in injury, and the patient's invalid consent do not preclude wrongfulness'. However, if a health care provider conducts a completely non-consensual treatment or substitute surgeon without consent, the action should be plead in battery, not negligence, but if a health care provider violate his duty of care in obtaining the consent of the patient by failing to disclosure all relevant information (risks) that a reasonable person would deem significant in making a decision to have the procedure, the action should be plead in negligence, not battery. Therefore, the scope of patients' self-determination can be protected by stating clearly the scope of the duty of the informed consent and the exemption of the informed consent legislatively, it is considered that it is valid to legislate the limitation of the discretionary power.