• International Journal of Industrial Entomology and Biomaterials
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• 제9권1호
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• pp.79-87
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• 2004

The silkworm rearing and growth parameters of 63 multivoltine silkworm accessions under extended period of egg preservation at 5$^{\circ}C$ from 30 days to 45 days were studied. The results indicate that, nine accessions did not respond to extended period of egg preservation at low temperature and the remaining 54 accessions responded to the treatment and three rearings were conducted for comparision with the control; to estimate the effect of prolonged egg preservation at low temperature. The non-parametric tests statistics (Wilcoxon tests) was adopted for comparing the mean performance of treated batches (45 days) over the control (30 days). Highly significant variability was found among the accessions for all the parameters under study. The genetically controlled morphological characters were not altered in the treated batches, which were found to be on par with that of control. However, the total larval duration varied significantly over the control in 51 accessions. Similarly, the fifth age larval duration of 27 accessions showed decreasing trend compared to control. Altogether 41 accessions were found to be tolerant to long-term cold preservation upto 45 days, without showing any significant variation for morphological as well as essential quantitative traits. These accessions may be recommended for long-term egg preservation schedule up to 45 days, which will reduce the cost of conservation of these silkworm germplasm.

• 대한치과의사협회지
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• 제48권11호
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• pp.819-828
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• 2010

Activator is a removable functional appliance used for correcting the skeletal Class II malocclusion in children with the mandibular deficiency. Berlin standard activator modified from Andresen activator has following characters; do not cover the palatal surface for tongue space, relief on lingual surface of mandibular incisors and resin capping 1/3-1/2 of crown height on mandibular incisors for preventing labioversion of mandibular incisors, L-hook between maxillary lateral incisor and canine for anterior high pull headgear, relief on mandibular posterior bite block for differential eruption of posterior teeth. Two cases presented here had a mandibular deficiency and slight maxillary protrusion. First case (an 11-year-old girl) treated with Berlin standard activator and anterior high pull headgear for 13 months followed by fixed orthodontic appliance for another 29 months. Second case (a 12-year-old boy) treated with Berlin standard activator for 6 months followed by fixed appliance for another 24 months. Treatment results showed a significant improvement in sagittal skeletal and occlusal relationship without premolar extraction. Mandibular condyles were concentric in TMJ [ossa, and masticatory muscle activities were normalized after treatment. In the retention period facial harmony and occlusal stability was maintained.

• 한국실내디자인학회논문집
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• 제13권4호
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• pp.74-82
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• 2004

Urbanization created by modernization and industrialization has brought tremendous growth of hotel demand with city ' development such as population’s centralization, living environment changes, consumption emphasis, and internationalization. Moreover, the hotel industry has been developed in two ways. First, it has been diversified and popularized by hotel culture. Second, the hotel industry has been upgraded form focusing oh its specific targets. In the view of Hotel design, Hotel was shown as a social and cultural value. Customer can experience the space, not normal big sizes, but being new and reflecting trends regardless of any purposes or locations. The hotels that were resulted in development of American economy and construction since the 1980 had new design concepts. These hotels were one of the examples showing pluralism requiring on modern society. In the case of Korea, Korean Architect Company have built in copying or repacked western hotel without considering Korean local conditions. Korean company just tried to make large scales, high-story buildings, and chain hotels. Nevertheless, it is the current trend to understand the customer's sensitivity and viewpoint by introducing a new style of hotel management that requires variety and different characteristics of hotel design. Therefore, the purpose of this study presents a direction of the future hotel architecture by analyzing design characters of domestic and international hotels, by collecting various consumer's requests.

• 대한미생물학회지
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• 제22권1호
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• pp.71-78
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• 1987

In order to determine the virulence properties of eleven strains of Sh. flexneri isolated from diarrheal patients the congo red test, the $Ser{\acute{e}}ny$ test, the HeLa cell invasion test and electrophoresis of plasmids were carried out. The results were summarized as follows. 1. Virulent strains were not determined by the result of Congo red absorption test. 2. Virulent strains showed positive reaction by the Sereny test and the HeLa cells invasion, but avirulent strains revealed negative reaction at those tests. 3. The temperature condition of bacterial growth was a factor of virulent expression. 4. Virulent strains were mostly possessed of a 130.3 Mdal plasmid, but avirulent strains were not.

• 농약과학회지
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• 제13권4호
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• pp.332-335
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• 2009

유기농 인증을 받아서 3년 이상이 경과한 농가의 토양을 수집하여 근권 세균을 450균주 분리하였고, 여러 가지 식물 병원균의 균사 생장을 억제하는 세균 KB-401 균주를 선발하였다. KB-401 균주는 특히 감귤 검은점무늬병균(Diaporthe citri)의 균사 생장과 포자 발아를 억제하며, 발아하는 포자에 처리하였을 때 발아관의 선단이 팽윤되는 현상을 관찰할 수 있었다. 본 균주는 생리적인 특성과 16S rDNA의 염기서열을 분석한 결과, Bacillus subtilis로 동정되었다.

• Journal of Plant Biology
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• 제8권1_2호
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• pp.11-18
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• 1965

Since Taquet's first discovery of wild P. yedoensis at Mt. Halla, Korea, in 1908, its morphological chracteristics and question of origin of cultivated yedoensis have given controversies to the botanists. Takenaka, through his experiments on the hybridity of cultivated P. yedoensis, recently holds the opinion that P. yedoensis might have originated in Izu peninsula, Japan. The author presents the summarized report on the wild P. yedoensis and its putative parents based on his 2 years' investigated carried out at Mt. Halla during his breeding experiment of genus Prunus. The species of cherry tree used in the present investigation were identified by Prof. Mankyu Park and Mr. Jonghyu Pu, Korean taxonomists. 1) Wild cherry trees which grow wild in Mt. Halla and whose blooming season is April are mostly P. subhirtella var. pendula form. ascendens and P. donarium P. yedoensis is rare in number, around 10 individuals, having been found in a half century. 2) Individuals of wild yedoensis are variable in some of their morphological characteristics. This is, also, true in other species of Prunus. 3) Wild yedoensis whose vigorous growth, sterility, and rarity in number suggest hybrid origin, has intermediate characteristics between the P. subhirtella and P. donarium. 4) Due to the abnormal weather of the island and various environmental factors such as havbitats, some of the early-blooming subhirtella and late-blooming donarium would bloom at the same time, giving these two species the changes to cross. 5) Wild yedoensis is slightly different in some of its quantitative characters from cultivated species.

• 한국환경과학회지
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• 제21권11호
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• pp.1297-1305
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• 2012

Clonal plants combine sexual and clonal reproduction, which contribute differently to plant fitness. Reproductive analyses have highlighted the importance of clonal growth in shaping the spatial genetic structure in Potentilla conferta Bunge, a herbaceous rhizomatic clonal distributed in hot sand dunes. We investigated the reproduction system of P. conferta at two populations in Mongol and three natural populations in Uzbekistan. The measurements of 19 quantitative or qualitative morphological characters were taken on each of total individuals directly from their natural habitats. Some morphological characteristics between Mongolia and Uzbekistan populations showed a slight heterogeneity of variance. Especially, the length of internodes (LFI and LSI) and characteristics of root (LLR and NOR) were shown a significant difference between two countries (P<0.05). P. conferta of Uzbekistan has most ramets at short distance intervals 30~100 cm. In light conditions, P. conferta of Uzbekistan was significantly less resilience than P. conferta of Mogol. In drought conditions, although there was not shown significant difference, P. conferta in Uzbekistan was less resilience than that in Mogol. The core analysis indicates that P. conferta in Uzbekistan is the more resistant than that of Mongol and seems to do by sexual reproduction strategy during several strong environmental disadvantages such as drought events.

• 생물정신의학
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• 제24권2호
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• pp.45-51
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• 2017

Anxiety is one of the basic human emotions. From the evolutionary psychology point of view, it is a necessary factor for survival and prosperity of human beings that had been developed throughout time with the history of human survival and development. Anxiety plays the role of protecting one from social or physical threats. In reality, lacking of anxiety showed lots of examples of maladjustments. But the result of over-adjustment, which is overanxious disorder, is definitely disturbing one's survival and growth, and it can lead to anxiety disorder that needs to be treated. Anxiety from the evolutionary psychology point of view, started as a primary adjustment form and it evolves into various types of anxiety disorders that relates to the modern society's characters. Therefore, having the grasp of evolutionary psychology, which can be the base of treating anxiety and anxiety disorders, is very important. So from now on, studies for this aspect would need to be done as integrated and multidisciplinary studies not only by psychiatrists, but by including epidemiologists, psychologists, ecologists, biologists, and neuropsychologists. In this article, the author tried to review and explore the idea of anxiety and anxiety disorders from the evolutionary psychology point of view.

• 한국작물학회지
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• 제39권4호
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• pp.353-358
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• 1994

초형이 다른 옥수수의 재식밀도에 대한 반응차이를 구명하고자 직립형 초형과 수평형 초형 교잡종을 재식밀도를 달리하여 재배하고 종실수량 및 주요형질을 조사한 결과를 요약하면 다음과 같다. 1. 공시된 4교잡종 모두 고밀식(10,000주 /10a)하에서 종실수량이 감소하였으나 직립형 교잡종보다 수평형 교잡종인 Ga209${\times}$Ki14A에서 감소의 폭이 더커서 초형간에 차이가 있었다. 2. 재식밀도 증가에 따라 초장은 짧아지고 착수고는 높아졌으나 초형간의 차이는 유의성이 없었다. 3. 수장, 열수, 및 열당입수는 재식밀도 증가에 따라 감소하였고 초형간에는 차이가 없었다. 4. 잎의 각도는 재식밀도에 따라 차이가 없었으며 종실수량, 수장, 열수 및 열당입수와 부의 상관을 보였다.

• 한국산업융합학회 논문집
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• 제6권4호
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• pp.299-305
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• 2003

This research is for the relationship with heat treatment cooling temprature and the characteristic of Mechanical properties of Boron-Addition-Steel, the main material and SM25C steel, the sub material, structure viewing fractography, hardness test, tensite test and are carried out after the manufacturing small-specimen treated with heat of $750^{\circ}C$, $850^{\circ}C$, $1050^{\circ}C$. The influence to the Mechanical properties accompanied by AISI51B20, Boron-Addition-steel shows the following result. 1. The influenc of heat treatment by the content of cabon-steel is dominant. Addition of boron result is Strengthening structure effectively by segregation and improving over all mechanical characters such as good. it results from the increase of temacity by the stability of inter granular with improvement of harden-ability. 2. Boron-Addition-Steel exist in the from of martensite structure accompanied by the ferrite precipitition centering around grain boundary, and is improved to Hv 200. 3. The height of harden-ability and fatigue stress the influence of heat results from crystal structure of martensite by difference of strength level in the structure of ferrite and doesn't have am effect on sensibility of temperature, and turns out to defend on production and growth of Matrix-structure-factor.