• Title/Summary/Keyword: Harmful Effects

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Crop Loss Survey by Wildlife in National Parks of Korea (한국 국립공원 내 야생동물과 농작물 피해)

  • Yoon, Seong-Il
    • Korean Journal of Environmental Biology
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    • v.25 no.3
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    • pp.223-227
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    • 2007
  • Crop loss and damage by wildlife are becoming more serious to residents inside and around National Parks of Korea annually. It could be caused by small size of Parks, which is couples of ten $km^2$ only, and more than a third of total parks' areas are belonging to privates. Wild boar (Sus scrofa) is one of the most harmful pests in nationwide. Treading down crop field using as bedding or resting site are major damaged types and foraging behavior is following. Besides of boars, Korean water deer (Hydropotes inermis), racoon dog (Nyctereutes procyonoides), and badger (Meles meles) are another serious pests. Mainly, farm products planted in upland, such as corns, sweet potatoes, cabbages, etc. are harmed easily, a rate reaches up to 76.9% of whole losses. 92.4% (n=187) of interviewees, who are mostly seniors, cultivate small crop fields smaller than 1 ha. Crop damage would be started from June to late November, time differences are happened due to latitude, climate condition, and crop differences of National Parks. Dusting animal repellents are easier and widespread methods to prevent animal foraging to crop fields and installing noisy makers using gun powder and setting up scarecrows are traditional methods for repelling animals. Nevertheless, effects of these self-defence are turned out to be useful soon after labors done only. Since legal compensation for crop damages by wildlife are not prepared systematically so far, crop loss are rarely reported to local government by most farmers. Systematic and objective methods for quantifying of crop loss by wildlife and population managements system should be offered urgently to well-managed animals habitat and residents' living inside National Parks.

Study of Efficiency of the East-west Medical Combined Treatment of Advanced Gastric Cancer in Patients Case (진행성 위암 환자 증례를 통한 한양방 병용치료의 효용성 연구)

  • Lee Nam-Heon;Shim Jae-Chul;Chae Eun-Yeong;Yoo Hwa-Seung;Cho Jung-Hyo;Lee Yeon-Weol;Son Chang-Kyu;Cho Chong-Kwan;Yun Dam-Hee
    • Journal of Physiology & Pathology in Korean Medicine
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    • v.19 no.6
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    • pp.1681-1684
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    • 2005
  • Gastric cancer is the most common disease which is the highest genetic rate, chemotherapy is the only known way to treat, especially advanced gastric cancer. Although, it is the remedy, the harmful side-effects are an obstacle of the sustaining treatment and negative effect on immunologic ability of patients prologed. Consequently, it is surely necessary that effective control for sequele of anti-cancer treatment, and remedy which can improve the quality of patients life. 1, the writer, medicate patients, diagnose as gastric cancer in 4th stage, with Sohap-hyangwon and Chungwoolhyadamjen who complained of pain in sequele of anti-cancer treatment. The size of the metastastic liver tumor is decreasing in patients and the immunologic abilities are maintaining stable. This clinical cases are shown that the oriental medical care in long-term can improve the quality of life of the patients who has sequele of anti-cancer treatment.

Effects of antii-IgE mAb on serum IgE, $Fc{\varepsilon}RII/CD23$ expression on splenic B cells and worm burden in mice infected with Paragonimus westermani (폐흡충 감염 마우스에 있어 Anti-lgE 단일크론 항체 처치시 혈청내 총 IgE, 비장 B 세포표면의 $Fc{\varepsilon}RII/CD23$ 발현 및 충체수에 미치는 영향)

  • 신명헌;민홍기
    • Parasites, Hosts and Diseases
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    • v.35 no.1
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    • pp.47-54
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    • 1997
  • It is generally accepted that parasite-specific IgE plays a crucial role in host defense against helminthic parasites. However, the role of high levels of nonspecific IgE in helminthic infections is still controversial. To investigate the role of nonspecific IgE in primary infections with P. westemani the effect of anti-lgE mAb treatment on serum IgE, $Fc{\varepsilon}RII/CD23$ expression and worm burden in Parcgonimus-infected mice were examined. In mice treated with anti-lgE antibody, the total IgE levels were not detectable ($1{\;}{\mu\textrm{g}/ml}$) throughout the experiment compared with untreated infected mice. The mean percentages of $Fc{\varepsilon}RII/CD23$ positive splenic B cells in anti-lgE treated mice (ridge: 20.3 - 30.5) were also decreased throughout the experiment compared with untreated infected mice (range: 35.7-44.4). Reduction of the total IgE and expression of $Fc{\varepsilon}RII/CD23$ on splenic B cells resulted in decreased worm burden six weeks post infection. These results suggest that high levels of nonspecific IgE in mice with primary infections of P. westemnni play a harmful, rather than beneficial, role for the host, perhaps by interfering with CD23-dependent cellular pathways.

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Water Quality of Streams in Some Agricultural Areas of Different Agricultural Practices along Nakdong River Basin (낙동강 유역 주요 농업지대 소하천 수질의 영농형태별 비교)

  • Chung, Jong-Bae;Kim, Bok-Jin;Kim, Jeong-Kook;Kim, Min-Kyeong
    • Korean Journal of Environmental Agriculture
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    • v.17 no.2
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    • pp.140-144
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    • 1998
  • A survey on four tributary streams in agricultural areas along Nakdong River was carried out to evaluate the effect of agricultural practices on the quality of streamwater. Typicalpaddy and upland farmings were major agriculturalpractice in two survey areas. Apple orchards were located along Imgo -Cheon. Intensive farming in plastic film house was conducted along the Habin cheon. Electriclal condutivity and nutrient contents were measured. Comparing to the reference water sample collected from very upper part of Yangsang -Cheon in Moonkyong, water in the streams studied were quite polluted and such pollution could be due to the farmings conducted along the streams. Phosphorus content were higher than the minimum level for eutrophication (0.01-0.05 mg/L). Nitrogeon content were also significantly high in many sites to cause harmful effects on crops when normalfertilizer level was applicated. Among the four stream, water quality in paddy area were relatively less polluted. High nitrogen level in Imgo-Cheon and high level of EC in Habin-Cheon were problematic. As farming is the major sources of pollution in the streams studied, this are traceable to the agricultural nonpoint sources. To maintain water quality of the stream, the agricultural nonpoint source along thributary streams should be properly controlled.

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Expression of the Heat Shock Protein 70 Gene and External Developmental Traits of Two Bivalvia Species, Crassostrea gigas and Mytilus galloprovincialis, under Aquaculture Environments (사육환경에 따른 이매패류 (Crassostrea gigas, Mytilus galloprovincialis)의 외부형질 성장과 Heat Shock Protein 70 유전자 발현)

  • Kim, Won-Seok;Park, Kiyun;Kim, Jong Kyu;Kwak, Ihn-Sil
    • Korean Journal of Ecology and Environment
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    • v.49 no.1
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    • pp.22-30
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    • 2016
  • Environmental changes exert harmful effects on organisms inhabiting coastal regions. These changes are also associated with reduced production in aquaculture farms. In this study, we investigated internal and external responses of two Bivalvia species (Crassostrea gigas and Mytilus galloprovincialis) in Gamak Bay under stressful environmental conditions in aquaculture farms. We investigated external responses such as weight, size, and environment exposure time, and analyzed the expression of the HSP70 gene. C. gigas HSP70 gene expression level was significantly high in the C3 aquaculture farm site, but the weight and size of C. gigas were high in the C2 aquaculture farm site. The response of C. gigas HSP70 mRNA was associated with the environmental exposure time in each aquaculture farm. Expression of M. galloprovincialis HSP70 gene was found to be significantly higher in the M2 aquaculture farm site than in the M1 site, whereas the weight of M. galloprovincialis was observed to be higher in the M1 site. The size and environmental exposure time of M. galloprovincialis were similar between M1 and M2 sites. In addition, HSP70 sequences of C. gigas and M. galloprovincialis showed high similarity with that of another marine species. According to our results, there were differences in internal responses following environmental stress in aquaculture farms, with respect to HSP70 gene expression. The results suggest that the HSP70 gene is a useful molecular indicator for monitoring stress responses in Bivalvia species in the field.

A Study of Internet Filtering for Public Information Resources (공공정보자원에서의 인터넷 필터링에 관한 연구)

  • Kim, You-Seung
    • Journal of the Korean Society for Library and Information Science
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    • v.41 no.2
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    • pp.111-133
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    • 2007
  • Illegal and harmful information on the Internet have been a great concern not only for regulatory authorities, but also all the public institutes, such as public libraries and schools, that provide Internet access service. In particular, for public libraries which play an important role in organizing, opening and providing information resources in the information society, providing Internet access service are indispensible. Therefore, any changes of Internet content regulatory system may have direct effects on services of public libraries. Due to unique characteristics of the Internet, content refutation on the Internet has made a best use of various regulatory methods, ranging from governmental regulation to self-refutation and technical regulatory methods. However, nation by nation. technical regulatory methods on the Internet have been developed in quite different ways. Applying them on public library has been strongly criticised for violating freedom of expression and rights of access to information. This article begins with a theoretical discussion about free speech rights and refutation on Internet. Then it examines filtering software which is one of the most popular technical regulatory methods based on both technical and socio-humanities' prospects and analyses several governments' regulatory approaches to Internet filtering. As a conclusion, issues concerning Internet filtering at public institutes are critically apprised.

And recognition of the next generation about the radioactivity A Study on the direction of education (방사능(선)에 관한 차세대 인식도 및 교육방향에 대한 고찰)

  • Seo, Dong-Woo;Kim, Kyeong-Yeon;Kim, Jong-Eun;Bae, Hyun-Hak;Son, Jae-Ho;Jeon, Min-Gyu;Jung, Jae-Eun
    • Korean Journal of Digital Imaging in Medicine
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    • v.16 no.1
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    • pp.43-47
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    • 2014
  • Sens of insecutity of the public and professionals about harmful effects of radiation is increasing in an accident at the Chernobyl and Fkushima nuclear power plant.Anxiety was amplified to lack of information about radiation majority of people. To target the middle and high school in the region of Daegu and Gyeongsangbuk-do, to investigate the radiation recognition of the next generation, it is intended to present a model of education for the safe use of radiation. The High School of the six metropolitan cities, city, town through the questionnaire and needs to be educational experience of radiation and use knowledge level of radiation, experience in daily life, understanding of man-made radiation and natural radiation, information channel on radiation, the radiation Distribute the total 800 parts of, to recover the 629 unit, was analyzed for 155 females 474 males. Many people 75.36% of the people, to 24.64% female subjects of this investigation, was constant, respectively from 13 to 18 years age. It is a large number and 30.37% of the respondents as "normal" level of knowledge of radiation, for the type of radiation, most knew. You have answer for risk experience of the medical radiation was higher, touching a lot of information via the broadcast medium in general, and the accuracy is low. I thought we wanted to be educated three or more twice a year, as an educator,about 71.37% and radiation-related understanding of knowledge and background in accordance with the diversification of information channels, the regional differences between urban and rural areas. But I considered the difference age (grade) for each is displayed, intended for junior high school students, the target surface and use the occurrence of radiation, high school students, the need for education about risk and application of radiation through this study.

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Spatial and Vertical Distribution of Polycyclic Aromatic Hydrocarbons in Sediment of the Shipyard Area in Gohyeon Bay (고현만 조선소 주변해역 퇴적물내 다환방향족탄화수소의 시공간적 분포특성)

  • Park, Pan-Soo;Kim, Nam-Sook;Yim, Un-Hyuk;Shim, Won-Joon;Kim, Gi-Beum
    • Journal of the Korean Society for Marine Environment & Energy
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    • v.12 no.2
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    • pp.68-74
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    • 2009
  • Polycyclic aromatic hydrocarbons (PAHs), one of ubiquitous organic pollutants in marine environments, are major toxic components of petroleum and are produced during the incomplete combustion of organic materials. As shipyards are located inside of natural or artificial semi-enclosed bay, even a relatively weak environmental disturbance by ship-building activity can cause severe damage to marine ecosystem in the bay. Many studies of pollution in shipyard area have been focused on the antifouling agent, like tributyltin. This study aimed to investigate the effect of ship-building activity on PAH contamination. Total PAHs concentration was higher nearby and inside shipyard area than outside, implying that shipyard could be one of major source area of PAH contamination to pose harmful effects to surrounding environments. Through PAH profile and source recognition index, the source of PAHs inputs in this area was estimated to originate from both petrogenic and pyrogenic origin. PAH levels showed a significant correlation with total butyltins, indicating that ship-building activity influenced PAH concentration and distribution. Vertical distribution of PAHs historically confirmed the correlation between shipbuilding activity and PAHs contamination.

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The Assessment of Ultraviolet Radiation in Vegetable Growth (식물생장(植物生長)에 미치는 자외선(紫外線)의 효과(效果))

  • Kim, Hyeong-Ok;Moon, Doo-Khil;Lee, Shin-Chan;Kim, Yong-Ho;Song, Pill-Soon
    • Korean Journal of Environmental Agriculture
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    • v.3 no.1
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    • pp.63-70
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    • 1984
  • The terrestrial UV flux rapidly increased in late spring, as measured by the chemical actinometry at two elevations (near sea level and 1,100m above sea level) on Jeju Island. More intense UV fluxes were observed at higher altitudes. Any harmful effects of solar UV-B on the growth of soybean were not detected in UV-B-exclusion experiment. To ascertain the effect of UV radiation on vegetative growth, intact (㏖ wt 124000) and large (${\sim}120000$) phytochromes were irradiated with UV-B radiation. In intact phytochrome, the Pfr form accounts for 60% of the total phytochrome under stationary state conditions, whereas it accounts for 50% in large phytochrome. Calculated quantum yields for the forward and the backward phototransformations of phytochrome by UV were ${\phi}r=0.016$ and ${\phi}fr=0.010$ in intact phytochrome, and ${\phi}r={\phi}fr=0.012$ in large phytochrome, respectively.

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Antibacterial Effect of Bacteria Isolated from the Plant Rhizosphere against Pathogenic Bacteria of Fish (식물근권에서 분리한 세균의 어류질병세균에 대한 항균활성 효과)

  • Jeong, Ji-Woon;Park, So-Hyun;Kim, Dong-Hwi;Jeun, Yong-Chull;Heo, Moon-Soo
    • Journal of Life Science
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    • v.24 no.7
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    • pp.757-761
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    • 2014
  • Olive flounder (Paralichthys olivaceus) is an important aquaculture fish species in Jeju Island, South Korea. Due to the intensification of flounder fish farming, huge amounts of chemical antibiotics are used against several fish diseases. This has many harmful side effects on fish, as well as human consumers. Hence, an alternative to chemical antibiotic agents is needed for disease control. In this study, three strains of rhizobacteria (BRH433-2, TRH415-2, and THJ609-3) were isolated from the rhizosphere of plants. Assays of their antibacterial activity against fish pathogens, such as S. iniae, S. parauberis, V. anguillarum, and E. tarda, were performed with untreated broth culture (without cell separation), supernatant, and precipitated pellets separated by centrifugation. Among these, the cell suspension prepared from the precipitated pellet showed significant antimicrobial activity when compared with that of the untreated broth culture and centrifugal supernatant. These results indicate that the three isolated rhizobacterial strains exhibit antibacterial activity. Analysis of the 16S rDNA sequences of the BRH-433-2, THJ609-3, and TRH415-2 strains showed the highest similarity to Burkholderia gladioli (99.5%), Pseudomonas baetica (97.7%), and P. koreensis and P. baetica (98.4%), respectively. We suggest that the strains hold promise in disease management of fish.