• Journal of The Korean Society of Grassland and Forage Science
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• v.43 no.4
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• pp.216-224
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• 2023

Since maize (Zea mays L.) originated in central and south America, it requires warm climate conditions throughout its growing season. Growth halts when night-time temperatures drop below 10℃, and the plant may die if temperature reach -1.7℃. Thus, temperature should be maintained between 10 and 30℃ from seeding to maturity. The germination temperature for maize should be at least 8-11℃, whit an optimal range 32-34℃. Since temperature significantly affects the germination rate and period, it plays a crucial role in maize growth. In this study, we evaluated the quantity and feed value of 11 major varieties to determine those best suited for maize cultivation as feed in higher latitude, specifically in Democratic People's of Republic of Korea, below 38 degrees north. A cultivation test was also conducted in Suwon in Republic of Korea, to assess adaptability in areas south of Mt. Suyang. Among the varieties tested, Shinhwangok2 reached silking the fastest, in 65 days, while Gwangpyeongok took the longest at 75 days. The stem length of all varieties exceeded 230 cm. Gwangpyeongok had the tallest stems, while Daanok and Shinhwangok2ho displayed the highest ear ratios. Dacheongok presented the highest values in both dry matter and TDN quantity, with 31,420 kg/ha and 21,66 kg/ha respectively. Pyeonggangok had the highest crude protein content at 8.0%. TDN (%) ranged from 57-68%, with Hwangdaok reaching up to 68%. Based on these findings, Dacheongok and Pyeonggangok appear to be the most suitable varieties for cultivation in terms of both quantity and feed value.

• Journal of agricultural medicine and community health
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• v.30 no.2
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• pp.241-249
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• 2005

Herein, two patients of acute toxic hepatitis occurred to persons had eaten Aplysia kurodai and their eggs. The authors report 2 patients of acute toxic hepatitis with reviews of the clinical features. One patient had gathered Aplysia kurodai and it's eggs from Ulleungdo sea shore on May 17, 2003. He ate with boiling the eggs. This patient developed acute toxic hepatitis and symptoms of aplysianin poisoning, such as abdominal pain, nausea, vomiting and watery diarrhea about 10 and half hours after ingestion. The other patient had gathered Aplysia kurodai and its egg from Ulleungdo sea shore on 16 May 2004, which were consumed without boiling the eggs. This patient developed acute toxic hepatitis and symptoms of aplysianin poisoning, such as abdominal pain, nausea, vomiting and watery diarrhea, about 10 and half hours after ingestion. This patient complained of jaundice and pruritus, about 10 days after ingestion. The 2 patients all improved within 15~25 days with conservative treatment. This is the first significant report of acute toxic hepatitis caused by aplysianin poisoning following the consumption of Aplysia kurodai and their eggs in Korea. The clinical features, management and preventive counterplan of acute toxic hepatitis caused by aplysianin poisoning are also presented.

• Korean Journal of Acupuncture
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• v.34 no.3
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• pp.164-171
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• 2017

Objectives : The purpose of this study is to study the effects of acupuncture on Young-gol and Dae-back on night fever and investigate the meridian and collateral aspects of Dong-Si acupuncture through cases of night fever due to Yin deficiency. Methods : Patients have received acupuncture on both sides(Young-gol and Dae-back) at 10 pm. The acupuncture treatment lasted for 15 minutes. Body temperature, pulse, and Numeric Rating Scale(NRS) scores for dryness of mouth were measured for the evaluation. Results : Both patients reported symptomatic reduction including night fever, pulse rate, NRS about dry mouth following the described treatments. The night fever disappeared after acupuncture treatment. The mean of pulse rate changed from 82.6 to 74.8(case 1), from 83.5 to 74.3(case 2). The mean of NRS changed from 4.2 to 1.7(case 1), from 3.3 to 2.4(case 2). Conclusions : In both cases, acupuncture was effective in relieving night fever symptoms. This can be considered from meridian and collateral aspects and the Korean medicine physiological perspective. In the future, systematic and diverse studies related to this will be needed.

• KOREAN JOURNAL OF CROP SCIENCE
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• v.23 no.1
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• pp.5-13
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• 1978

An experiment was carried out to find out effective heading date and period of limited ripening in different regions of climatic conditions by sowing date and length of nursery stage of a new variety Milyang 23. Since varieties of Tongil line have a character of premature heading, these do not show the symptom of senescent even though length of nursey stage was delayed. And the delay of heading date is due to late transplanting date, on the other hand, length of nursery stage delayed.

• Korean Journal of Medicinal Crop Science
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• v.2 no.2
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• pp.105-109
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• 1994

This experiment was conducted to know the labor saving effect and reducing production cost by agricultural mechanization in the cultivation of Bupleurum falcatum. Labor reducing effects of the drilling seeder by hand and the machine attached to two wheel tiller were 97%, but emergency rate was highest in the former. Dry root yield per plant was increased by low amount of seed sowing but that yield per unit area was increased at much seeding amount in the seeder attached to the tiller. The drilling seeder by hand was showed highest standing ratio of seedling and produced yield to 84.1kg of root yield per 10a. Labor saving effect was the best at the multipurposes mechanized harvester and labor saving and famer's income ratio were increased to 69% and 50% respectively. Labor time and cost were reduced to 74% and 69% respectively by mechanization of sowing and harvest cultivation practice on Bupleurum falcatum.

• Journal of Korea Foresty Energy
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• v.20 no.2
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• pp.9-19
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• 2001

This study was carried out to investigate natural insectifuge materials from tree extractives in order to substitute for organic synthetic insecticides for food wrapping corrugated board. Tree samples were collected, extracted, fractionated with hexane, $CH_2Cl_2$, ethylacetate(EtOAc) and $H_2O$, and then freezed dried for further study. EtOAc or $H_2O$ fractions were chromatographed on a Sephadex LH-20 column for isolation and purification, and the isolated compounds were characterized by spectroscopic tools such as NMR and MS. Crude extractives of EtOAc and $H_2O$ fractions were added to the printing ink for corrugated board with the concentration of 2% or 3% based on the weight of the ink, then the prepared ink was printed on the corrugated board to be used for evasion test using larva of indian meal moth(Plodia interpunctella(Hubner)). Robtin, dihydrorobinetin and leucorobinetinidin were isolated from the wood extractives of black locust(Robinia pseudoacacia) and the bark of poplar(Populus alba $\times$ glandulosa) contained many kinds of compounds such as (+)-catechin, naringenin, aromadendrin, eriodictyol, sakuranetin and its glycoside, taxifolin, neosaturanin, salireposide, p-coumaric acid and aesculin. Much of (+)-catechin was isolated from the bark extractives of willow(Salix koreensis) in addition to (+)-gallocatechin and p-coumaric acid and the bark of weeping willow(Salix babylonica) also contained (+)-catechin, (+)-gallocatechin, dihydromyricetin and myricetin.

• KOREAN JOURNAL OF CROP SCIENCE
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• v.32 no.1
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• pp.78-85
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• 1987

In order for Paldanghomil (winter rye) to be investigated if its grain yield is able to be produced after clipping just before winter season for forage utilization this experiment was carried out under the four sowing dates of four locations in Korea (Chunchon, Suwon, Hwasung and Chungju). In rye clipping plot earlier sowing showed taller plant height, more number of tillers/㎡ and higher forage yield before winter season, indicating the highest forage yield (1803 kg/10a) in Chunchon by sowing of September II. Forage yield of rye before winter season was mainly influenced by plant height and number of tillers/㎡, showing more effect of plant height. Rye plants were more or less affected on winter damages, late heading and short culm by clipping before winter season. Analysis of variance indicated that only number of spikes/㎡ among grain yield components showed the high significance according to the clipping method, and that there showed little variation for other yield components due to the sowing date and clipping method. There showed more grain yield in non-clipping rather than that of clipping plot, indicating the difference of 46kg/10a. This was resulted from short culm and severe winter damages caused by clipping before winter season. Of the grain yield components, number of spikes/㎡ was greatly influenced for grain yield by analysis of stepwise regression. Therefore, grain yield of rye was able to produce after forage utilization before winter season due to the appropriate crop and soil managements, by resulting from the little variation in grain yield between clipping or non-clipping plots and from the higher grain yield by the early sowing.

• Korean Journal of Medicinal Crop Science
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• v.4 no.4
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• pp.271-276
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• 1996

This studies were conducted to basic information on growth characteristics and root yield in progeny the derived from different bolting years and to establish optimum seed production time in Angelica gigas. Plant height of early and mid-growing stages had decreased with each year increase in bolting year, but showed no significance in late growing stage at different bolting years. Root charac­teristics including root length, root diameter and dry root weight was slightly good and it had high root/ shoot ratio in third year seed production. respectively. Bolting rate showed that first year seed 38.1%, second year seed 10.4% and third year seed 1.2%, respectively. Therefore, optimum seed production time revealed third year seed for reduce bolting rate. Root yield at different bolting years showed average 1,690kg per hectare as fresh root weight on first year seed, 2,860kg on second year and 2,940kg on third year seed, respectively. A significant positive correlation was appeared between bolting rate and plant height in mid-growing stage. On the other hard, there was highly significant negative correlation between bolting rate and root yield.

• Sijohaknonchong
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• v.20
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• pp.75-96
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• 2004

A pavilion is located in the place with beautiful scenery, which maximizes the poetical features of nature. So a scholar in the Chosun Dynasty had the dream of possessing it. This trends of the Chosun scholar resulted in producing lots of literary works related with the pavilion. In this thesis, I researched the characters of Pavilion Si-Jo in accordance with the function of pavilion. First, the pavilion, which is surrounded by the beautiful scenery, is a good place to see the beauty of nature. It is needless to walk around to see the scenery thanks to its open structure. So the feeling in the pavilion Si-Jo is distinguished from other sightseeing Si-Jos: those show the way of seeing the scenery walking here and there, but this shows the way of seeing the scenery only just looking up, looking down, and looking in the distance. Second, the pavilion functions as an academic place. In this case, it can be said that it functions like a lecture hall. It is more effective to study in the pavilion than in the closed structure, a lecture hall. Furthermore, the scholar studying in the pavilion understand the principle of nature with seeing the beautiful mountain and river, and it can be a place for growing a vast-flowing spirit. This kind of poetry has been handed down with the Chinese poetry, and the character who operated the pavilion often appears in the work. Third, the pavilion functions as a space for a fraternity or poetry circles. The poetic exchange was conducted by host of pavilion. which is the key ingredient for organizing a poetry circles. Finally, the pavilion functions as an entertainment. Although it is a space for an entertainment, there is no deviation as a man of novel birth. If the pavilion has the feature of closeness, there are sometimes works which shows the deviation of them.

• Sijohaknonchong
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• v.19 no.1
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• pp.207-234
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• 2003

The purpose of this research paper is to study the characteristics of Huang Yunseok's sijo and it's implications for his poetic intentions. Huang Yunseok's sijo is didactic in its presentation of facts and ethical lessons. The two main facts it presents are royal favors and his clan's pride. Royal favors concern. for example, encouragement of the king, the king's birthday and deathday, and securing a government position by the king's order. His clan's pride concerns, for example, the geographically wonderful place of Huang Yunseok's ancestor's tomb, his ancestor's great conduct, his clan's beautiful tradition, his birth place, and his birth dream. The main content of the ethical lessons concerns cultivation of the human mind and practicing Confucian ethics. Examples of the former describe the purpose of Confucian study, the ethical doctrine that human being's inborn nature is good, the character of the human mind, and the method of cultivating the human mind. Examples of the latter describe the moral rules to govern the Five Human Relations, separation between husband and wife, and discrimination between males and females. The poetic intention of Huang Yunseok's sip consists of political and economic self-promotion and theoretical devotion to Confucian ideology. Proud of his educated, high Confucian clan, he tries to get self-promotion politically and economically by vowing loyalty to the king. He implies devotion to the Confucian ideology through his description of the practice of the Confucian moral rules, the clinging to traditional Neo-Confucianism, and his insistence on the Neo-Confucian theory that all human beings and animals are the same in their original nature. In conclusion, the didactic character of Huang Yunseok's sip stems from his intention to promote himself politically and economically and his theoretical devotion to Confucian ideology. The way of indicative expression originates from the didactic character of Huang Yunseok's sijo.