• Parasites, Hosts and Diseases
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• 제41권1호
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• pp.41-45
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• 2003

Effects of gamma irradiation on the worm survival and chromosomal aberration of Clonorchis sinensis were studied. The metacercariae irradiated with various amounts of gamma radiation (ranging from 5 Gy to 50 Gy) were fed to rats, and the effects were compared with those of non-irradiated controls. Recovery rates of adult worms in irradiated groups were reduced gradually as increasing of the irradiation doses. No worm was recovered from rats which were fed with 50 Gy irradiated metacercariae. The chromosome number was 2n = 56 in all worms from all experimental groups. However, the groups irradiated with 20 Gy, 25 Gy or 30 Gy showed variations in the chromosome number, depending on different cells in the same individual. Radiation doses used in this study did not appear to induce chromosome aberrations, however, irradiation with 30 Gy showed slightly reduced chromosome size.

• 한국환경과학회지
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• 제12권1호
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• pp.63-68
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• 2003

Effective alginate extraction from waste-brown seaweeds was studied. The waste-brown seaweeds almost consist of stems of seaweeds. Alginate could be obtained from the stems as well as leaves of seaweed. Ultrasonic vibration(47kHz) facilitated filtering step in the alginate extraction process. Among various alkalies for alginate extraction, $NaHCO_3$ was most appropriate concerning use of dealginates. The yield of alginate extraction using $NaHCO_3$ 2wt% solution was 19.3% at $60^{\circ}C$. The dealginates from $NaHCO_3$-extraction process have been found most suitable food for red-worms.

• Journal of Communications and Networks
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• 제10권1호
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• pp.89-97
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• 2008

Anomaly detection systems playa significant role in protection mechanism against attacks launched on a network. The greatest challenge in designing systems detecting anomalous exploits is defining what to measure. Effective yet simple, Shannon entropy metrics have been successfully used to detect specific types of malicious traffic in a number of commercially available IDS's. We believe that Renyi entropy measures can also adequately describe the characteristics of a network as a whole as well as detect abnormal traces in the observed traffic. In addition, Renyi entropy metrics might boost sensitivity of the methods when disambiguating certain anomalous patterns. In this paper we describe our efforts to understand how Renyi mutual information can be applied to anomaly detection as an offline computation. An initial analysis has been performed to determine how well fast spreading worms (Slammer, Code Red, and Welchia) can be detected using our technique. We use both synthetic and real data audits to illustrate the potentials of our method and provide a tentative explanation of the results.

• Parasites, Hosts and Diseases
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• 제52권3호
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• pp.291-294
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• 2014

Acanthotrema felis is an intestinal trematode of cats originally reported from the Republic of Korea. Only 1 human case infected with a single adult worm has been previously recorded. In the present study, we report 4 human cases infected with a total of 10 worms recovered after anthelmintic treatment and purging. All 4 patients reside in coastal areas of Jeollanam-do, Korea, and have consumed brackish water fish including the gobies, Acanthogobius flavimanus. The worms averaged 0.47 mm in length and 0.27 mm in width, and had 3 sclerites on the ventrogenital sac; 1 was short and thumb-like, another was long and blunt-ended, and the 3rd was long and broad-tipped. They were identified as A. felis Sohn, Han, & Chai, 2003. Surveys on coastal areas to detect further human cases infected with A. felis are required.

• 한국산학기술학회논문지
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• 제7권6호
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• pp.1206-1213
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• 2006

자기 전파하는 웜들의 속도가 사람이 대응하는 속도 보다 매우 빠르기 때문에 zero-day 웜들을 봉쇄하기 위해서는 웜 시그니쳐의 빠른 검출과 자동생성이 필수적이다. 본 논문에서는 웜 공격에 대응 할 수 있는 시그니쳐 자동생성 방법을 제안하고, 제안한 방법의 프로토타입을 구현하여 DHT 기반 네트워크에 적용하여 웜 시그니쳐를 생성함으로써 제안한 방법의 유효성을 보이도록 한다.

• 대한수의학회지
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• 제21권1호
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• pp.45-50
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• 1981

In the survey on the pig-stomach worms of the abattoir pigs in Gyeongbug province, some unusual nematodes were found by gross and microscopic inspection to the pig-stomach. The results obtained in the survey and identification were summarized as follows. 1. A natural infection of Anisakis type larvae in the pig gastric wall was newly confirmed in korea and in all cases, the larvae were identified as Anisakis type 1 (Berland, 1961). 2. A chronic granulomatous lesion with small lymphocytes, neutrophils and eosinophils was appeared in the gastric wall penetrated by the larvae. 3. Of total 318 pigs, 9 pigs were infected with the larvae and in each stomach, only one or two worms were detected from the abattoir pigs. 4. Ascarops strongylina was found as one percent.

• Animal Systematics, Evolution and Diversity
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• 제8권2호
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• pp.223-230
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• 1992

한국산 철선충류의 분류학적 연구를 위해 1986년 8월부터 1992년 5월까지 남한의 16개 지역에서 철선충을 채집하여 조사한 결과 1속에 속하는 1신종 1한국 미기록종이 확인되었다. 이들은 Gordius lineatus n. sp.와 Gordius robustus이며, 기재와 함께 그림을 작성하였다. 지금까지 한국산 철선충류는 1906년 Linstow에 의해 2속(Gordius, Parachordodes)3종, 1959년 조에 의해 Gordius aquaticus 1종이 기록되어있다. 따라서 한국산 철선충류는 모두 2속 6종이 된다.

• BMB Reports
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• 제54권5호
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• pp.253-259
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• 2021

Aging is characterized by a functional decline in most physiological processes, including alterations in cellular metabolism and defense mechanisms. Increasing evidence suggests that caloric restriction extends longevity and retards age-related diseases at least in part by reducing metabolic rate and oxidative stress in a variety of species, including yeast, worms, flies, and mice. Moreover, recent studies in invertebrates - worms and flies, highlight the intricate interrelation between reproductive longevity and somatic aging (known as disposable soma theory of aging), which appears to be conserved in vertebrates. This review is specifically focused on how the reproductive system modulates somatic aging and vice versa in genetic model systems. Since many signaling pathways governing the aging process are evolutionarily conserved, similar mechanisms may be involved in controlling soma and reproductive aging in vertebrates.

• Molecules and Cells
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• 제44권8호
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• pp.623-625
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• 2021

• Parasites, Hosts and Diseases
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• 제32권1호
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• pp.1-6
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• 1994

1992년 6월부터 1993년 10월까지 전주도축장에 출하되는 2세 이상의 한우 1,074두의 복강으로부터 Setaria속 선충류 2종을 검출하여 그 형태를 관찰 감염상황을 조사한 결과를 요약하면 다음과 같다. 이들 사상충은 S. digitata와 S. marshalli었으며 성충의 두부와 미부의 형태적 특징을 광학 및 주사전자현미경으로 관찰하여 분류할 수 있었으며 특히. S. marshalli는 국내 미기록종이다. 또한 전북지방 한우의 Setaria속 감염율은 34.2%이었으며, 이 중에서 S. digitata 25.1%, S. marshalli 2.9%, 중복감염 6.2%로 나타났다. 한편, 검출된 Setaria의 충체총수는 1,254마리이었으며, 그 중 S. digitata 암컷 66.8% 수컷 19.1%. S. marshalli 암컷 9.2%, 수컷 5.0%로 나타났다. 그리고, 그 크기에 있어서 S. digitata 암컷 $7368.09{\;}{\pm}{\;}1229.39{\;}\mu\textrm{m},{\;}수컷{\;}4769.30{\;}{\pm}{\;}389.62{\;}\mu\textrm{m}$ S. marshalli 암컷 $9150.00{\;}{\pm}{\;}1449.59{\;}\mu\textrm{m},{\;}수컷{\;}5068.56{\;}{\pm}{\;}261.07{\;}\mu\textrm{m}$이었다.