The efficacy of chemical disinfectants is reduced owing to the inactivation of active ingredients after dilution. This study investigated the effect of time on the efficacy of six different disinfectants, after dilution, against avian influenza virus. When used at the recommended concentration, most disinfectants showed efficacy at a high concentrations in the presence of organic materials immediately after dilution, while sodium dichloroisocyanurate-based products, after dilution, showed reduced efficacy over time at low concentrations in the absence of organic materials. Most disinfectants were neutralized by organic materials; however, this could be compensated for by increasing the product dosage. For successful decontamination in farms, disinfectants should be used at high concentrations in accordance with the manufacturers’ recommendations. Furthermore, the presence of organic materials must be taken into consideration, and diluted disinfectant solution should be prepared no more than a day before use.
This study explains an agricultural mobile commerce case using Oauth Based Real-Time Information Sharing Technique according to the growth of the agricultural e-commerce market. Considering the characteristics of the agricultural market, it can confirm differential values with the existing agricultural mobile commerce market according to the functions and characteristics of its technique. We compare variables for introducing agricultural mobile commerce with the existing mobile commerce. Trust through information sharing with real-timefarming diaries, suitability and perceived ease of use variables are positively influenced, but influence on completeness and authority of information variables are relatively insufficient. Through this, we explained differential values of agricultural mobile commerce and suggested an applicable business model.
The rice green caterpillar Naranga aenescens Moore (Lepidoptera: Noctuidae) is one of important destructive insect pests to Poaceae including rice and corn. We investigated the development periods of N. aenescens egg, larva, pupa and total immature at eight constant temperatures of 15.0, 17.5, 20.0, 22.5, 25.0, 27.5, 30.0, and 32.5°C, respectively. N. aenescens developed successfully from egg to the adult stage at all temperatures tested except 15.0°C. Developmental rate of N. aenescens increased as temperature increased from 15.0 to 30.0°C but declined at 32.5°C except pupa stage. The lower developmental threshold (LDT) and thermal constant (K) was estimated by linear regression. Higher temperature threshold (TH) and lower temperature threshold (TL) were calculated by two nonlinear functions. LDT and K from egg to adult emergence were 12.01°C and 330.84DD. The temperature range of N. aenescens from TL to TH using performance model (24.03) was wider than that from SSI model (19.77). Developmental completion of N. aenescens was described using a two-parameter Weibull distribution model. The adult emergence frequency of N. aenescens over full range of constant temperatures was simulated using developmental rate functions and Weibull function.
Species diversity of ant fauna inhabiting the university campus in the Seoul Metropolitan city, Hanyang University is documented in this investigation. Totally, 14 species of 8 genera belong to 3 subfamilies discovered in study area. Our results are compared with the previous works on ant fauna in the forest and urban habitats based on species number difference. In study area, site 12 and 13 contain wide forest area and diverse environmental elements such as rotten wood, leaf mold and group of living tree. Site 7 has small forest area, but show wide variety of environments like site 12 and 13. Urbanized region like site 8, 10 or area in construction like site 1 show the most lowest diversity. Aside from diversity, Four ant species, Paratrechina flavipes, Lasius spp., Camponotus japonicas, Tetramorium caespitum, appear at almost all habitat, seems to have strong tolerance to environmental change.
Vollenhovia emeryi (Hymenoptera: Myrmicinae) is dimorphic in its wing morphology of alate females: the long-winged and the short-winged. In our previous study, we found that the long-winged is ancestral and the short-winged is derived. Intriguingly, the former is infected with the intracellular symbiotic Wolbachia bacterium and the derived is void of the bacterium indicating that the latter somehow evolved resistance to the bacterium.
This may be one of few cases in which transition from susceptibility to the bacterium can be traceable via the divergence estimation. As a consequence, we inferred that the two morphs diverged approximately quarter million years ago; a remarkably recent event in evolutionary perspective.
In this presentation, we will further discuss genetic orchestration in the host insect and future research directions.
본 연구는 스톡홀름 Saltsjon 해변가와 보존지역, 신도시에 영향을 주는 색채마감의 요인에 대해서 분석하였다. 사실 상 환경에 영향을 주는 색채디자인은 보존지역뿐만 아니라 신도시에도 중요한 영향을 끼친다. 칼라디자인 맵을 이용해 서 지역별로 건축물 색채의 시각적인 평가 및 선호도를 제시하였다. 이러한 시도는 해변가 및 신도시뿐만 아니라 역사적 인 보존지역에도 색채를 조절하는데 중요한 도구가 된다. 색상, 명도, 채도는 색채 측정기와 색채 팔레트를 이용해서 측정하였다. 체크 부분은 주로 건축물 외관 및 지붕으로 하였다. 시각적 평가 제안인 색채경관은 해안가 및 도시의 이미지를 만드는데 중요한 목표가 된다. 이러한 비교를 통해 색채이미지 축은 색채 전이로 인해 경향을 분석할 수 있는 좋은 방법이다. 분석 결과 도시 색채에 있어서 태양복사의 양에 따라 다양한 색채 구성표가 만들어져 많고 화려한 색채 구성이 이루 어졌다. 도시의 색에 있어서 건물 벽보다는 지붕과 관련된 변수가 도시경관에 긍정적 효과가 있었으며 현대 건물의 재료 는 빛의 산란에 의해 색의 범위가 확대되어 색채의 전이 축이 넓게 나타났다. 젊은 세대는 새로운 지역에서는 무겁고 밝은 색채계획을 함께 선호하였으며 보전지역에서는 자연스러운 색채를 선호하였다. 스톡홀롬 가치 결정 요인분석에 있어서 색채의 고유한 특성은 스톡홀롬의 도시경관의 가치에 긍정적 영향을 미치고 있으며 이후 건물 개조 및 신축에 있어서 적용해야 할 것이다.
Osteocalcin (OC) is the most abundant noncollagenous protein of extracellular matrix in the bone. In an OC deficient mouse, bone formation rates are increased in cancellous and cortical bones. OC is known as a negative regulator of mineral apposition. OC is also expressed in the tooth of the rat, bovine, and human. However, little is known about OC during tooth development in Xenopus. The purpose of this study is to compare the expression of OC with mineralization in the developing tooth of Xenopus, by using von Kossa staining and in situ hybridization. At stage 56, the developmental stage of tooth germ corresponds to the cap stage, and an acellular zone was apparent between the dental papilla and the enamel organ. From stage 57, calcium deposition was revealed by von Kossa staining prior to OC expression, and the differentiated odontoblasts forming predentin were located at adjoining predentin. At stage 58, OC transcripts were detected in the differentiated odontoblasts. At stage 66, OC mRNA was expressed in the odontoblasts, which was aligned in a single layer at the periphery of the pulp. These findings suggest that OC may play a role in mineralization and odontogenesis of tooth development in Xenopus.
We created species richness maps of mammals, birds and plants using "Nnational Ecosystem Survey" data and identified correlations between species richness maps of each taxa. We examine the distribution of species richness of each taxa and calculated conservation priority rank through plotting species-area curves using an additive benefit function in Zonation. The conclusions of this study are as follows. First, plant showed high species richness in Gangwon province and Baekdudaegan, and mammals showed high species richness at eastern slope of Baekdudaegan in Gangwon province unusually and the species richness of mammals distributed equally except Gyeonggi and Chungnam province. However, birds showed high species richness in the west costal because the area is the major route of winter migratory birds. Second, correlation of each taxa’s distribution is not significant. Correlation between mammals and birds is positive but correlations between birds and others are negative. Because mammals inhabit in forest but birds mostly live in coastal wetlands and rivers. Therefore, bird’s habitats are not shared with other habitats. Third, the probability of mammals occurrence is very low under 25% in species-area curve, others increase proportionally to area. Birds increase dramatically richness at 10% because bird's habitat is concentrated in coastal wetlands and rivers. Plants increased gently species richness due to large forest in Gangwon province. We can calculate the predicted number of species in curves and plan various conservation strategies using the marginal number of species. Finally, high priority ranks for conservation distributed mainly in Gangwon province and Baekdudaegan. When we compared with priority map and terrestrial national parks, the parks were evaluated as high priority ranks. However, the rank of parks away from Baekdudaegan was low. This study has the meaning of selecting conservation priority area using National Ecosystem Survey. In spite of the omission of survey data in national parks and Baekdudaegan, the results were good. Therefore, the priority rank method using species distribution models is useful to selecting protected areas and improving conservation plans. However, it is needed to select protected areas considering various evaluation factors, such as rarity, connectivity, representativeness, focal species and so on because there is a limit to select protected area only using species richness.
시각예술가인 저자는 자신의 드로잉과 설치작업 세계를 이해하기 위한 통찰을 제시하고자 한다. 저자는 미적-예술적 선과 대립되는 과학적-기술적 선의 현상과 효과를 고찰하고자 하면서, 발생할 수 있는 어떠한 유추에 대해 설명하고자 한다. 제도가로서 저자가 참고하는 자료들이 가지고 있는 과학적인 문제에 접근한다면 어떤 일이 생길까? 그것은 추측일까 혹은 인식일까? 선을 보다 구체적으로 다루려는 의도에서 저자는 예술적 그리고 과학적 관점에서 기하학의 근원적인 문제를 해결하고자 시도하였다. 저자는 일종의 번역작업으로 유클리드의 원리와 구성적 기술에 근거한 증명의 계도 형식의 도형을 만들고, 이 도형을 드로잉에 반영하고 있다. 저자는 드로잉 혹은 설치작업이 다양한 요소와 층위를 전개시키면서 본질적으로는 자체적으로 구성됨을 보여주고자 한다.
우리가 정보를 수집하고, 서로 상호작용하고, 우리의 정체성을 만들어 가는 방식은 점점 현재 인터넷상의 많은 사이트에서 사용되는 개인전용화 알고리듬에 의해 형성되고 있다. 개인전용화 알고리듬은 우리 자신의 관심사를 우리에게 공급해 줌으로서 각각의 개인에게 가장 연관되는 정보를 제공해 준다는 것이 개인전용화 알고리듬이 가진 문제이다. 이것이 만드는 피드백 루프는 개인의 정체성에 중요한 영향을 미칠 뿐 아니라, 개인과 집단 간의 관계에도 영향을 준다. 본 논문은 톰슨 앤 크레이그헤드(Thomson & Craighead), 라파엘 로자노-헤머(Rafael Lozano-Hemmer), 마닉스 드 나이스(Marnix de Nijs), 다니엘 로진(Daniel Rozin) 의 예술작품을 살펴보고 알고리듬 피드백 루프가 개인적, 집단적 행동, 자아에 대한 이미지와 세계관, 그리고 집단 정체성에 미치는 영향을 분석한다. 궁극적으로 본 논문은 순환적인 과정의 구조와 특성을 재구성함으로써 개발될 수 대안들을 모색하고자 한다.
Despite the general understanding of the prominent role of basic reading sub-skills, such as decoding abilities and reading fluency, in the reading comprehension of younger and proficient first and second language readers, little is known about the role of these skills in older and less skilled readers in foreign language contexts. The present study was designed to investigate how decoding skills and reading fluency relate to the reading comprehension of such readers, and to identify the relative strengths between the two. Two hundred twenty two Korean high school students participated, and their performance on decoding, reading fluency, and reading comprehension tasks was analyzed. The results showed that both decoding skills and reading fluency were strongly correlated to reading comprehension. Moreover, between the two fundamental reading sub-skills, decoding skills outperformed reading fluency in explaining reading comprehension, making a unique contribution beyond the effects of reading fluency. These findings suggest that a basic skill like word decoding still deserves instructional attention even at the secondary schools in EFL contexts.
Salmonellosis is a significant public health concern and a major cause of bacterial foodborne poisoning in Korea. Approximately 95% of salmonellosis cases in humans are related to the intake of contaminated food products, which mostly originate from livestock such as poultry, pigs, and cattle. To successfully develop strategies to reduce the spread of Salmonella, it is important to investigate the prevalence of Salmonella spp. isolated from food animals and meat. In Korea, the prevalence of Salmonella spp. in cattle was 1.2 2.0%, whereas in pigs it was 1.5 21%. Of all livestock and meat products analyzed, the Salmonella isolation rate was the highest in chickens (18.8 30.3%) and their meat.
Antibiotic resistance is an important social issue. The frequent use of antibiotics in the livestock industry has led to increased antibiotic resistance in Salmonella isolates that are extracted from livestock, which raises serious public health concerns. To prevent the spread of antibiotic resistance, it is essential to collect data related to antibiotic-resistant Salmonella strains isolated from food animals and meat. Antibiotic resistance tests revealed that Salmonella isolated from cattle, pigs, and poultry were highly resistant to tetracycline and streptomycin. Recent studies show that the overuse of antibiotics in food animals can also affect antibiotic resistance in humans. Therefore, it is important to establish an appropriate management strategy to successfully prevent misuse of antibiotics within the Korean livestock industry.
Optimization of the protocorm-like body (PLB) formation of Phalaenopsis and Dendrobium hybrids was performed by determining the effects of plant growth regulators (PGRs) and different parts and division sizes of the PLB. For both genera, the base part was the best for the proliferation of PLBs, yielding the highest number of PLBs on a PGR-free medium for Phalaenopsis and medium containing 0.1μM NAA and 10.0μM BAP for Dendrobium. As regards the division size, four-division sections resulted in a higher PLB formation efficiency for Phalaenopsis, while two-division sections produced a higher PLB formation efficiency for Dendrobium. It is expected that these findings will be applicable to efficient PLB formation of other Phalaenopsis and Dendrobium orchids.
HMR is a home-style food product designed for convenience and cooked outside the home leaving out cumbersome cooking process and consumed at home. The present paper aims to find out factors that influence the consumption of HMR by analyzing data on food consumption during the 3 years between December 2010 and November 2013. Following the classification of Costa et al. (2001), this study categorized HMR products as 3 types as follows: C1 (ready to eat), C2 (ready to heat) and C3 (ready to cook), and examined factors affecting purchase rate and per capita purchase price for each type of HMR product. The results of our analysis show that only the purchase rate of C3 products was influenced by whether the purchaser was housewife with job or not. For those who do not live together with parents, per capita purchase price for HMR was high; and the more they ate out, the higher the purchase rate of HMR was.