• Journal of Conservation Science
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• v.32 no.3
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• pp.321-331
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• 2016

Textiles damage caused by acetaldehyde($CH_3CHO$) is not clear as compared to other materials. Total 20 specimens were prepared using 4 different materials (silk, cotton, ramie, hemp) after dyed with 4 colors (undyed, red, yellow, blue, black). The specimens were exposed to $CH_3CHO$ gas in the test chamber. First, textile specimens' damage by differert concentration of acetaldehyde(0.1, 0.5, 1, 10, 100, 500, 1000 ppm) was tested. Second, accelerared damage to the textile specimens were tested according to the temperature and humidity conditions at the damage levels. Third, damage of deliberately degraded textile specimens were examined at the damage levels. After the exposure, optical, chemical, and physical evaluation was carried out. As a result, at 1000 ppm/day, the color difference of cotton_yellow has increased. At the condition of $25^{\circ}C-80%$, $30^{\circ}C-50%$, $30^{\circ}C-80%$, the color difference of yellow specimens has increased and grey scale rating has decreased. At $30^{\circ}C-80%$, acetate of cotton_undyed increased and the pH of silk_undyed decreased. In the case of deliberately degraded textile specimens, actetate concentration of black specimens increased. In conclusion, damage to the traditional fabric by acetaldehyde is not impact. However, it is expected that yellow specimens will be bleach and black specimens' actetate concentration will be increase.

• Journal of Conservation Science
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• v.30 no.4
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• pp.353-364
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• 2014

Formaldehyde(HCHO) may have a damage effect on Korean traditional textiles, because concentration is high and occurrence frequency is frequent at the exhibition room and storage area. Total 20 specimens were prepared using 4 different materials (silk, cotton, ramie, hemp) after dyeing with 5 colors (undyed, red, yellow, blue, black). The specimens were exposed to HCHO gas in the test chamber. The gas acceleration test was conducted to identify the deterioration of Korean traditional textiles according to HCHO concentration(0.5, 1, 10, 100, 500ppm), to temperature-humidity condition at HCHO 500ppm, and deterioration conditions at HCHO 500ppm. Optical, chemical, and physical evaluation was carried out after the exposure. The results, color difference, grey scale rating, formate($HCO_2{^-}$) of some textiles increased at 500ppm, while pH decreased at 500ppm. Also, color difference, grey scale rating, formate($HCO_2{^-}$) of some textiles increased double damage at high temperatures & humidity, high humidity condition. But, damages of accelerated degradation textiles were slight, because of degradation degree and degradation products. The results suggest that determined the damage to the korean traditional textile, damage level, damage-weighted condition, damage to accelerated degradation textiles. In addition, formaldehyde damaged to yellowing of red textiles, bleaching of accelerated degradation textiles, formic acid damaged to bleaching of total 20 specimens.

• Journal of the Korean Society of Costume
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• v.63 no.4
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• pp.84-100
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• 2013

Ancient Greece was a patriarchal society that distinguished gender roles between men and women. Although their costumes were composed of simple rectangular fabric without any technical complications in itself, the Greeks did try to express gender differences in their clothing. The final look of the Greek costume was dependent on the way the cloth draped onto its wearer as well as the wearer's identity. Greeks costume could just be seen as a rectangular fabric when it was not draped on a person's body. The purpose of this study is to examine how the gender differences were expressed in the ancient Greek drapery costume, which was made by using a completely different technical process, compared with the modern tailored costume. There are four elements of the costume that give the costume its formative shape, which are the wearer's body, the rectangular fabric (material as the first formative costume), the way the fabric is draped, and the final appearance as the second formative costume (the relationship between the wearer's body and the costume) and this study analyzes these elements individually. It is intended to analyze the gender characteristics and how each element appears in a different way from the perspective of Structuralism, an analytical method that considers a phenomenon as a total sum of the elements. Literature research was conducted and representative sculpture, painting and pottery, were used between the Archaic Period (B.C. 800~500) and the Classical Period (B.C. 500~323). The results show that the gender differences appear in each formative element of costume: First, the body was distinguished by the ancient Greek custom. The man's nudity was accepted while the woman's body was concealed. Second, in regards to the first formative costume, which was the rectangular fabric, men's were made with thick high quality wool because their involvement in outdoor activities meant that they needed clothes to stay warm, while the women wore clothes made of thin wool or hemp cloth, because their most of their activities were at home. Third, the way to drape the fabric shows the gender differences by changing the length of the clothing and its design ; men's short khiton was practical for big movement and at the same time the clothing exposed the man's body. The woman's doric khiton diversified its decoration by the size of the apotigma and by using the belt. Finally the second formative costume reflected the Greeks' social distinction between a man's body and a woman's body. The man's costume naturally exposed the man's body. On the other hand, the woman's long costume has a variety of shapes on the ground, that concealed her lower body, while the ornamental function was more accentuated than the man's costume. The gender differences expressed in Greek costume fundamentally reflected the point of view of the male and female body and their social roles in society.

• The Research Journal of the Costume Culture
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• v.9 no.1
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• pp.61-72
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• 2001

Chunghahk-dong is located in a retired spot, Jiri Mountain and has been built up its won religion and culture without any exchange outside world. People in Chunghahk-dong believe in a religion called Genjungyutaosim. Forming a trinity on which mind is Taoism, body is Buddhism, and behavior is confucianism. These are the principle elements to form a village. They made their own unique cultural factor such as longhaired boys and girls, wearing traditional cloths and hat, a monastic life, folk mores and family rituals, and private school system. This shows a great deal of affection on their life style and organization and is closely connected with community and culture. Grasping a culture and behavior on clothing, it has propose to understand Chunghahk-dong properly according to this study. A method of study has a purpose to understand culture and clothing behavior precisely in Chunghahk-dong. I inquire ito clothing behavior with investigation and study of picture script. The results are as followed; People in Chunghahk-dong show unique clothing and hair style behavior based on Genjungyutao. First, men and women wear a white cloth called HanBok(Korean costume) and footwear made of rubber. Only men wear a blue vest. A grown up men wear a long coat when they go out. They are dressed in tractional cloth for a ceremonial occasion. The reason why they put on the HanBok(Korean costume) is a belief on our traditional cloth becomes a standard dress in the future. They believe Korea becomes a standard dress in the future. They believe Korea becomes a standard dress in the future. They believe Korea become a leading country in the world. This clothing behavior is symbol of Genjungyutao and has a role of delivery system for expressing their split. Second, In sign of being a Genjungyutao men, they let their grow hair. Cutting hair is not to be a Genjungyutao men any more. There is few reason that people in Chunghahk-dong let grow their hair : First, because of importance in TanGun's ideology, they believe Korea is a first nation in the world and can't cut their hair which has grown from TanGun (The founding father of the Koran nation) Chosun traditionally. Second, Cutting their hair runs counter to the principle of nature. Third, They value their body for confucianism. They don't want to damage their body because of body from their parents. Boys and girls braid and tie up their hair and adult tie a topknot and a chignon. Wearing a YouGun(A horsehair skullcap) at home and Kat(A Korean top hat) when going out, they express as a Genjungyutao. Hemp cloth and synthetic fibers are main clothes. Also, they wear an improved HanBok(Korean costume) these days on influence outside.

• Journal of Convergence for Information Technology
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• v.10 no.11
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• pp.168-176
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• 2020

Reactive oxygen species (ROS) damage DNA and cause cancer. Therefore, the research is being conducted on the development of antioxidants for the removal of ROS. This study was performed to investigate antioxidant activity and protective effect against oxidative DNA damage using ethyl acetate fractions from the cone of Pinus rigida × taeda (ERT). The antioxidant activity was evaluated using the DPPH, ABTS radical scavenging assay, reducing power assay, and Fe2+ chelating assay. Also, the contents of phenolic compounds and vitamin C related to antioxidant activity were analyzed to confirm phytochemicals. The DNA protective effect against oxidative stress was confirmed by the φX-174 RF I plasmid DNA cleavage assay. As a result, ERT showed DPPH and ABTS radical scavenging activities in a concentration-dependent manner. The results of reducing power and Fe2+ chelating activities were 77.32 ± 2.28% and 64.09 ± 1.01% at 200 ㎍/㎖. Also, ERT showed a DNA protective effect against oxidative stress.

• Journal of the Society of Cosmetic Scientists of Korea
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• v.31 no.2 s.51
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• pp.189-196
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• 2005

Motherwort (Leonurus sibiricus L), a hemp nettle (Labiatae) plant, grows about 1.5${\~}$2 m high spontaneously to wildness in Korea, China, Japan, and other Asian place. Its medical applications includes women's uterine disease, urination, bloody stool, bloody urine, and hemorrhoids. It's also effective for high blood pressure, heart stimulation, and anti-cancer activity. We first prepared chlroform and methanol extracts of motherwort and then they were fractionated using water, $30\%$ methanol, $60\%$ methanol, and $100\%$ methanol, respectively. Each fractionates is assayed for free radical scavenging activities against DPPH and anti-oxidant activity by TBARS assay measuring lipid peroxidation using LDL. The $30\%$ and $60\%$ methanol fractionates of methanol extracts showed strong anti-oxidant activity compared to vitamin C. They also had more Potent SOD activity using pyrogallol at 250 ppm than that of vitamin C. These results suggest that anti-oxidant activities of motherwort may be applicable to development of natural anti-oxidant cosmetics. Possibility of nature anti-oxidation ability cosmetics is seen possibility low official.

• Journal of Conservation Science
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• v.28 no.4
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• pp.321-328
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• 2012

A $SO_2$ gas acceleration test was carried out on four textile groups (silk, cotton, ramie cloth, hemp cloth) which were categoried in five categories by the dyeing materials (undyed, red, yellow, blue, black) and the relation between the concentration of $SO_2$ and deterioration rate was evaluated. The textiles were exposed to 0.01, 0.12, 1, 10, 100, 1000, and 5000 ppm of $SO_2$ for 24 hours and the optical, physical, and chemical deterioration rates were studied. An optical change was identified as the color difference and grey scale rating (colorfastness) enhanced with the increase of gas concentration while there was little physical change. Chemical damage was caused by the acidification of the textile material due to the trapped sulfate ion concentration. The result of optical, physical, and chemical deterioration rates shows that 1 ppm/day $SO_2$ is a critical level of deterioration of traditional textiles.

• Korean Journal of Heritage: History & Science
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• v.49 no.4
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• pp.114-125
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• 2016

Lacquer is one of the most widely used natural resin in East Asia since Neolithic Age. As a major ingredient of lacquerware, lacquer is waterproof, insect-proof and rot-proof to be durable and anti-abrasion, generally utilized for mainly painting purpose. According to lacquerware excavated from several sites of Japan and China, lacquerware seems to appear in Neolithic Age. On the other hand in case of excavation research in Korea, lacquerwares are found after the Bronze Age. The initial purpose of lacquer is estimated to be adhesive, regarding the literatures mentioning bitumen(Yeoksceong ), animal glue(Kyeo) and egg alumen(Nanbaek). Especially piece of jar coffin unearthed in Pyeongtaek Daechu-ri site had trace of restoration by lacquer and hemp as an evidence of lacquer for adhesion in Pre-Three Kingdoms period. Since then a trend to restore the broken ceramics with lacquer and decorate with golden foil lasted especially in Joseon Dynasty. In the field of gold plated lacquer method, mother-of-pearl inlaying technique for lacquerware and restoration of buildings, lacquer is still used as adhesive. Due to matter of reversibility lacquer is being avoided for conservation and restoration of cultural heritage. Lacquer as a traditional material for adhesive since ancient times, however, has advantage in adhesion strength and durability. Because synthetic resin adhesive has problem of emission of volatile organic compounds and aging over time, lacquer receives attention recently. On the contrary, by combination adhesive from mixing lacquer and animal glue, already proved the possibility of applicability and chemical modification. A research to utilize lacquer as modern paint or functional material is also conducted continuously also in China and Japan. To put traditional material into practical use and modernize, chemical research from the molecular level of the lacquer is necessary in the near future.

• Journal of Life Science
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• v.32 no.2
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• pp.155-160
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• 2022

Kenaf (Hibiscus cannabinus L.), one of the four major fiber crops, is attracting attention for its efficient CO₂-absorbing ability and versatility for producing daily supplies, including textiles. In Korea, a new cultivar 'Jangdae' was established in 2013. The ease of cultivation and seed gathering of 'Jangdae' has led to its nationwide cultivation. However, evaluation of the bioactivities of the different parts of kenaf, and especially the 'Jangdae' cultivar, remains rudimentary. In this study, the antithrombosis and antioxidant activities of extracts prepared from different parts of the 'Jangdae' cultivar were evaluated by determining their effects on blood clot formation. Extracts prepared from seeds (HC-SD), seedpods (HC-SP), leaves (HC-L), stems (HC-S), and roots (HC-R) of the 'Jangdae' cultivar strongly inhibited blood clot formation. In particular, the HC-SD, HC-SP, and HC-S extracts showed strong inhibition against the coagulation factors prothrombin, and thrombin. The HC-SP extract showed strong antioxidant activities, such as scavenging ability against DPPH anion, ABTS cation, nitrite, and reducing power. Since blood clot formation is closely related to oxidative stress, the HC-SP extract could be developed as a novel anticoagulation and antioxidant resource. This is the first report of the antithrombosis activities of different parts of H. cannabinus L. cv. 'Jangdae'.

• Journal of Dairy Science and Biotechnology
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• v.39 no.4
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• pp.129-144
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• 2021

Following the COVID-19 pandemic, many people are increasingly becoming interested in health and environmental issues. Therefore, the sale of vegan or vegetarian products has been increasing over the last few years, as well as interest in non-dairy plant-based milk that can replace cow's milk. Furthermore, the global food industry has developed an interest in such products, considering the recent changes in consumer trends. In Korea, various products are being launched annually due to the increasing interest in non-dairy plant-based milk. However, research with regard to the quality and type of products produced in Korea is still at the preliminary stage when compared to those in the United States and Europe. Therefore, the present review has summarized non-dairy plant-based milk analogues based on the following key aspects. First, the types of non-dairy plant-based milk analogues and their production technologies (in the order of almond milk > cocoa milk > coconut milk > hemp milk > kidney bean milk > oat milk > peanut milk > rice milk, and soy milk). Second, the current status and future prospects for non-dairy plant-based milk analogues. Third, recent trends and future challenges associated with the production and quality improvement of non-dairy plant-based milk analogues. Fourth, the current status and outlook of the non-dairy plant-based milk analogue market in Korea. In conclusion, the present review could provide the food industry with valuable information regarding non-dairy plant-based milk analogues to facilitate the development of related products. Data were obtained from previously published studies.