• Parasites, Hosts and Diseases
• /
• 제31권2호
• /
• pp.91-98
• /
• 1993

To determine the infectivlty and maturity of nletacercanae of Parqgonimur westermani after keeping at low temperature for a long period, 45 mice and 45 rats were each infected with 20 metacercariae which were kept at $4^{\circ}C$ for 8 to 234 days. The worm recovery in mice increased with age of worm and reached a peak of 32% at 41-50 days and then decreased with age. The rate In rats first decreased to a lowest point of 6% at 71-100 days and then Increased with age. In 42 infected mice and 41 infected rats, 187 immature worms (183 tiny and 4 Juvenile ones) and 190 worms (164 tiny, 19 Juvenile and 7 mature ones) were recovered respectively. Two wormcysts with eggs only and 8 empty wormcysts were also found In the rats. In addition, the frozen metacercanae can still develop to mature worms in SD rats.

• Parasites, Hosts and Diseases
• /
• 제50권3호
• /
• pp.221-223
• /
• 2012

A 26-year-old man residing in a village of Thai Nguyen Province, North Vietnam, visited the Thai Nguyen Provincial Hospital in July 2008. He felt a bulge-sticking pain in his left eye and extracted 5 small nematode worms by himself half a day before visiting the hospital. Two more worms were extracted from his left eye by a medical doctor, and they were morphologically observed and genetically analyzed on the mitochondrial cytochrome c oxidase 1 gene. The worms were 1 male and 1 female, and genetically identical with those of Thelazia callipaeda. By the present study, the presence of human T. callipaeda infection is first reported in Vietnam.

• 한국정밀공학회지
• /
• 제26권12호
• /
• pp.47-54
• /
• 2009

A worm screw is widely used in a geared motor unit for motion conversion from rotation to linear. For mass production of a high quality worm, the current rolling process is substituted with the milling process. Since the milling process enables the integration of all operations of worm manufacturing on a CNC(Computer Numerical Control) lathe, productivity can be remarkably improved. In this study, the tooling system for planetary milling on a CNC lathe to improve machinability is developed. However, the cutting tool-workpiece interference is important factors to be considered for producing high quality worms. For adaptability of various worms machining, the tool-workpiece interference simulation system based on a tool-tip trajectory model is developed. The developed simulation system is verified through several kinds of worms and experimental results.

• 한국가시화정보학회지
• /
• 제13권2호
• /
• pp.22-27
• /
• 2015

Caenorhabditis elegans (C.elegans) has various interesting behavioral properties, such as chemotaxis, thermotaxis, and electrotaxis. However, most previous research were only focused on single-stimulus for studying its behavioral properties. In this paper, we propose a simple and effective device for analyzing the behavior of C.elegans with combined stimuli, electric field and temperature. We compared and analyzed wild type worms (N2) and four mutant worms (tax-4, ttx-7, unc-54, unc-6). We analyzed the reaction of worms to certain stimulus and identified that this device is effective to apply a combined stimulus.

• Parasites, Hosts and Diseases
• /
• 제40권2호
• /
• pp.101-103
• /
• 2002

The reservoir hosts of Thelazia callipaeda were examined. The eyes of the 76 does raised at farm, 78 military dogs (shepherds), 96 cattle, and 105 pies were investigated for the presence of eyeworm. Among them, six worms of T. callipaeda were collected from two dogs raised at farm (2.7%) , and 188 worms from 26 shepherds (33.5%). No worms were recovered from the cattle or pigs, These results suggest that the dogs. especially the military dogs are serving as a reservoir host of T. callipaeda in Korea.

• 기술사
• /
• 제45권5호
• /
• pp.36-38
• /
• 2012

Insect/worm is a source of protein food, more calcium than you think, made up of low-fat and high protein in the worms, 20% of the entire protein, nutrients, and so. because of this, the value of any insect food will rise. Is not argued that enough, livestock methane from gaseous material of the earth temperature no phi but not small role, and indeed. If a non-carbone missions from livestock are less and consequently the production of biofuels using worms because it is also expected to be available to the worms in cattle, such as no benefit is expected that you will be spotlighted.

• 한국어병학회지
• /
• 제23권3호
• /
• pp.421-427
• /
• 2010

Anisakid nematodes third stage larvae were isolated from the muscles of masou salmon (Oncorhynchus masou). Fish were purchased from Jumunjin fishery market in Gangneung. Four Anisakid third stage larvae were isolated from 4 fish. Molecular identification of the isolated worms was conducted by PCR-RFLP analysis of ribosomal DNA internal transcribed spacer region and direct sequencing of mitochondrial DNA cox2 gene. As results, all the tested individual worms were identified as Anisakis simplex (sensu stricto). This is the first report of molecular detection of anisakid worms in salmonid fishes in Korea.

• 정보보호학회논문지
• /
• 제16권3호
• /
• pp.165-172
• /
• 2006

누구나 인터넷에 접속할 수 있는 환경이 구축됨에 따라 해킹, 악성코드 등의 다양한 위협도 함께 등장하고 있다. 그 중 인터넷 웜은 1.25 대란과 같이 국가 기간망을 뒤흔들 수 있는 위협으로 인식되고 있다. 본 논문은 인터넷 환경에서 웜 확산의 모델링을 그 목표로 한다. 이를 위해 인터넷 원에 적용 가능한 확산 모델을 제안하고, 인터넷 환경에서 웜에 적용하여 동작을 분석한다. 제안 모델은 고속의 인터넷 웡 확산에 따른 영향을 분석함으로써 인터넷 웜의 확산을 보다 정확하게 예측할 수 있다.

• 유기물자원화
• /
• 제13권1호
• /
• pp.71-78
• /
• 2005

지렁이를 이용하여 음식물쓰레기를 처리하고 처리 후 발생되는 분변토는 음식물쓰레기 수분조절제 및 토양개량제로 사용하여, 기존의 음식물쓰레기 처리방법의 문제점 해결과 아울러 지렁이를 이용한 음식물쓰레기 자원화를 목적으로 연구한 결과, 음식물쓰레기 전처리 공정은 세척, 분쇄 및 혼합 등의 공정으로 이루어 졌으며, 음식물쓰레기 염분농도는 평균 0.7%로 나타나 지렁이 먹이로 적합하지 않았으나 세척수를 이용하여 세척공정을 거친 후 0.38%로 낮아져, 지렁이 생육에 적합한 염분농도 조절을 위하여 식기 세척수를 이용한 세척공정이 필요한 것으로 나타났다. 또한 지렁이를 이용한 음식물쓰레기 처리 가능성 실험에서 입자의 크기가 작을수록 처리효율이 높은 것으로 나타나 2mm이하의 분쇄공정이 필요한 것으로 나타났으며, 음식물쓰레기 수분조절을 위한 분변토 혼합은 비율이 높을수록 처리효율이 높은 것으로 나타났으나, 경제성을 고려 할 때 5:5의 비율이 가장 적합한 것으로 판단된다. 음식물쓰레기 전처리 공정을 거친 후 지렁이 퇴비화장치에 투여, 15일간 운영하면서 처리과정별 pH, EC, Eh, 염분, VS 등의 이화학적 항목을 살펴본 결과 투입에서 분변토 발생까지 지렁이 생존에 적합한 환경을 유지하여 지렁이를 이용하여 음식물쓰레기 처리가 가능한 것으로 나타났으며, 처리 후 발생된 분변토는 부숙토 제품기준에 적합한 것으로 나타나 지렁이를 이용한 음식물쓰레기 처리 후 발생된 분변토의 재활용이 가능한 것으로 나타났다.

• 농촌의학ㆍ지역보건
• /
• 제5권1호
• /
• pp.28-33
• /
• 1980

This study was undertaken to evaluate the present status of A. lumbricoides infection in a rural area of Korea. The 307 residents of all age group in Gumsa Myun, Yeo Ju Gun were examined by Kato's cellophane thick smear technique. Pyrantel pamoste was administered to the Ascaris infection cases by a single dose of 5mg/kg of body weight. The whole amount of 24 hour stool during two or three consecutive days were collected sepatately. The expelled A. lumbricoides worms from the unfiltered stool remnants were collected. They were measured by the length and weight, and the sex of the worms were differentiated. The results are as follows: 1) The incidence of A. lumbricoids infection of the 307 specimens examined was 40.1%(male: 40.9%, female:39.0%). The difference according to guman sex distribution was not statistically significant. 2) Seventy two Ascaris infected cases expelled 163 worms of various size. The mean number of worms per infected case were calculated as 2.3. The sex ratio of examined female and male Ascaris was 1.5:1 3) Among the expelled 97 female worms, the genital girdle were found in 60 female worms(61.9%). Genital girdle of gemale worm was located from the head in the position of $38{\pm}4$ of total length 100. 4) The average body length of male Ascaris was $16.3{\pm}3.1cm$ and female Ascaris was $21.7{\pm}3.5cm$ 5) The relationship between the weight(Y) and the length(X) of individual Ascaris worm was plotted. Y(gm).0.32$\fallingdotseq$(cm)-3.1 in female and Y(gm)$\fallingdotseq$0.1X(cm)-0.1 in male.