• 한국해양학회지:바다
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• 제24권3호
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• pp.429-435
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• 2019

연안에서 해표면고도를 정확하게 측정하도록 특별히 설계된 SARAL/Altika위성에 의해 관측된 해류를 비교 검정하기 위해 2015년 3월부터 2년간 위성추적 뜰개가 동해 북부 해상에 투하되었다. 해표면 고도 측정 위치에서 반경 20 km 이내에 위치한 뜰개(30분 간격으로 GPS로 위치 관측)와 비교한 결과, 수심 200 m 보다 얕은 해역에서 외해와 유사하게 높은 상관관계를 가진 것으로 나타나, 해류의 직접 관측이 어려운 동해 북부의 연안류의 시간 변동을 관측할 수 있게 되었다. 리만 해류는 일년 년중 시베리아 연안을 따라 남하하는 해류로 관측되었으며, 북한 한류는 여름철에만 남향하는 해류를 보였다. 북한 한류는 무수단곶 이남에서는 주로 남향류를, 무수단곶 이북에서는 무수단곶 근해에서의 에디 존재 유무에 의해 방향이 결정되는 것으로 연구되었다.

• Parasites, Hosts and Diseases
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• 제59권2호
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• pp.131-138
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• 2021

Helminth infections are prevalent in Lao People's Democratic Republic (Lao PDR). This study aimed at determining the prevalence and risk factors of intestinal helminthiasis in remote mountainous villages of northern Lao PDR. During the dry season in January 2017, a cross-sectional survey was conducted in 3 remote mountainous villages in Oudomxay province, Lao PDR. Villagers older than 18 years of age who agreed to submit stool samples or undergo an interview, were recruited. Stool samples from 198 individuals were examined by the Kato-Katz method, and a questionnaire surveyed 161 individuals among them. Univariable and multivariable logistic regression analyses were used to identify risk factors associated with the intestinal helminthiasis. An overall prevalence of intestinal helminthiasis was 75.8%. Hookworm infection was the most common (63.1%), followed by Opisthorchis viverrini/minute intestinal flukes (17.7%), Taenia spp. (15.2%), Trichuris trichiura (2.0%), Ascaris lumbricoides (1.5%), and Enterobius vermicularis (1.0%). Questionnaire analysis revealed sex (male) and absence of latrine to be significant risk factors for hookworm infection and consumption of raw meat for taeniasis. These results suggest that the mountainous area in northern Lao PDR has a different composition of helminth infections from other studies conducted in Lao PDR; a high prevalence of hookworm infection and taeniasis and low prevalence of T. trichiura and A. lumbricoides infections were observed. Also, liver flukes or intestinal flukes were similarly prevalent in the mountainous area.

• Parasites, Hosts and Diseases
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• 제58권6호
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• pp.619-625
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• 2020

Human hookworm infections caused by adult Ancylostoma spp. and Necator americanus are one of the most important tropical diseases. We performed a survey of intestinal helminths using the Kato-Katz fecal examination technique targeting 1,156 villagers residing in 2 northern provinces (Preah Vihear and Stung Treng) of Cambodia in 2018. The results revealed a high overall egg positive rate of intestinal helminths (61.9%), and the egg positive rate of hookworms was 11.6%. Nine of the hookworm egg positive cases in Preah Vihear Province were treated with 5-10 mg/kg pyrantel pamoate followed by purging with magnesium salts, and a total of 65 adult hookworms were expelled in diarrheic stools. The adult hookworms were analyzed morphologically and molecularly to confirm the species. The morphologies of the buccal cavity and dorsal rays on the costa were observed with a light microscope, and the nucleotide sequences of mitochondrial cytochrome c oxidase subunit 1 (cox1) gene were analyzed. The majority of the hookworm adults (90.7%) were N. americanus, whereas the remaining 9.3% were Ancylostoma ceylanicum, a rare hookworm species infecting humans. The results revealed a high prevalence of hookworm infections among people in a northern part of Cambodia, suggesting the necessity of a sustained survey combined with control measures against hookworm infections.

• Journal of Audiology & Otology
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• 제23권4호
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• pp.175-180
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• 2019

Diagnosis of pre-lingual hearing loss (HL) is difficult owing to the high number of genes responsible. The most frequent cause of HL is DFNB1 due to mutations in the GJB2 gene. It represents up to 40% of HL cases in some populations. In Iran, it has previously been shown that DFNB1 accounts for 16-18% of cases but varies among different ethnic groups. Here, we reviewed results from our three previous publications and data from other published mutation reports to provide a comprehensive collection of data for GJB2 mutations and HL in northern Iran. In total, 903 unrelated families from six different provinces, viz., Gilan, Mazandaran, Golestan, Ghazvin, Semnan, and Tehran, were included and analyzed for the type and prevalence of GJB2 mutations. A total of 23 different genetic variants were detected from which 18 GJB2 mutations were identified. GJB2 mutations were 20.7% in the studied northern provinces, which was significantly higher than that reported in southern populations of Iran. Moreover, a gradient in the frequency of GJB2 mutations from north to south Iran was observed. c.35delG was the most common mutation, accounting for 58.4% of the cases studied. This study suggests that c.35delG mutation in GJB2 is the most important cause of HL in northern Iran.

• 대한청각학회지
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• 제23권4호
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• pp.175-180
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• 2019

Diagnosis of pre-lingual hearing loss (HL) is difficult owing to the high number of genes responsible. The most frequent cause of HL is DFNB1 due to mutations in the GJB2 gene. It represents up to 40% of HL cases in some populations. In Iran, it has previously been shown that DFNB1 accounts for 16-18% of cases but varies among different ethnic groups. Here, we reviewed results from our three previous publications and data from other published mutation reports to provide a comprehensive collection of data for GJB2 mutations and HL in northern Iran. In total, 903 unrelated families from six different provinces, viz., Gilan, Mazandaran, Golestan, Ghazvin, Semnan, and Tehran, were included and analyzed for the type and prevalence of GJB2 mutations. A total of 23 different genetic variants were detected from which 18 GJB2 mutations were identified. GJB2 mutations were 20.7% in the studied northern provinces, which was significantly higher than that reported in southern populations of Iran. Moreover, a gradient in the frequency of GJB2 mutations from north to south Iran was observed. c.35delG was the most common mutation, accounting for 58.4% of the cases studied. This study suggests that c.35delG mutation in GJB2 is the most important cause of HL in northern Iran.

• Parasites, Hosts and Diseases
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• 제49권4호
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• pp.385-398
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• 2011

A large-scale survey was conducted to investigate the infection status of fresh water fishes with Clonorchis sinensis metacercariae (CsMc) in 3 wide regions, which were tentatively divided by latitudinal levels of the Korean peninsula. A total of 4,071 freshwater fishes were collected from 3 regions, i.e., northern (Gangwon-do: 1,543 fish), middle (Chungcheongbuk-do and Gyeongsangbuk-do: 1,167 fish), and southern areas (Jeollanam-do, Ulsan-si, and Gyeongsangnamdo: 1,361 fish). Each fish was examined by the artificial digestion method from 2003 to 2010. In northern areas, only 11 (0.7%) fish of 2 species, Pungtungia herzi and Squalidus japonicus coreanus from Hantan-gang, Cheolwon-gun, Gangwon-do were infected with av. 2.6 CsMc. In middle areas, 149 (12.8%) fish were infected with av. 164 CsMc. In southern areas, 538 (39.5%) fish were infected with av. 159 CsMc. In the analysis of endemicity in 3 regions with an index fish, P. herzi, 9 (6.2%) of 146 P. herzi from northern areas were infected with av. 2.8 CsMc. In middle areas, 34 (31.8%) of 107 P. herzi were infected with av. 215 CsMc, and in southern areas, 158 (92.9%) of 170 P. herzi were infected with av. 409 CsMc. From these results, it has been confirmed that the infection status of fish with CsMc is obviously different among the 3 latitudinal regions of the Korean peninsula with higher prevalence and burden in southern regions.

• 한국식품영양학회지
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• 제10권2호
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• pp.201-207
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• 1997

경기 북부 지역의 3개 전문대학에서 주, 약간별 학생들의 학교식당 이용실태를 조사하였다. 학교식당의 이용율에서 거의 매일 이용하는 주간 학생은 64.29%였고, 야간 학생들은 44.35%로 주간 학생의 이용이 더 많았다. 학교식당을 이용하는 이유로는 '달리 먹을 만한 장소가 없어서'가 주, 야간 각각 49.38, 68.01%로 나타났고, 다음으로는 '가격이 저렴해서', '시간이 절약되므로'의 순으로 나타났다. 학교식당을 이용하지 않는 이유로는 주간의 경우 52.09%, 야간의 경우 31.99%가 '맛이 없어서' 이용하지 않는 것으로 나타났고, 학교식당을 이용하지 않는 경우 주간의 경우 68.63%, 야간의 경우 37.37%가 학교 밖에서 매식하는 것으로 나타났다. 평균적인 식사의 형태는 밥식>라면, 국수류>과자류>빵류의 순이었다. 학교식당의 음식에 대한 만족도는 음식의 양을 제외하고는 맛, 기호, 반찬수 등에서 만족도가 낮은 것으로 나타났다. 학교식당의 개선점으로는 '음식의 맛과 질이 향상되어야 한다'는 점에 가장 많이 응답했고, 그 다음으로 '메뉴가 다양해야 한다', '가격이 저렴해야 한다', '위생적이어야 한다'의 순으로 나타났다.

• 한국축산식품학회지
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• 제25권4호
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• pp.383-390
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• 2005

국내 시장에 유통 중인 국내 및 수입산 냉장$\cdot$냉동 삼겹살의 관능적 품질 특성을 조사하기 위하여 총 12종의 수입산 및 국내산 삼겹살을 구입, 연령 및 성별로 구분된 60명의 관능 검사 요원을 대상으로 조사하고 분석하였다. 냉동 삼겹살의 경우, 풍미, 맛 및 연도에서는 처리구별 유의적인 차이를 나타내지 않았으나, 다즙성 및 기호도에서는 국내산 냉동 삼겹살에 비해 수입산 냉동 삼겹살을 더욱 선호하였으며 (p<0.001) 특히, 북미산 냉동 삼겹살에 대한 기호도가 높은 것으로 조사되었다. 또한, 연령에 따른 조사 결과 역시, 국내산보다는 수입산 냉동 삼겹살에 대한 선호도가 높은 것으로 조사되었다. 국내산 냉장 삼겹살과 수입산 냉동 삼겹살의 검사결과의 경우, 국내산 D산의 냉장 삼겹살보다는 수입산 냉동 삼겹살을 더욱 선호하는 경향을 나타내었다(p<0.05). 그러나 국내산C사의 경우에는 기호도면에서 북미산과는 유의적인 차이를 나타내지 않았으나(p>0.05), EU산보다는 높은 기호도를 나타내는 것으로 조사되었다(p<0.05). 또한, 연령에 따른 조사 결과에 의하면 20대의 경우에는 국내산 C사의 냉장 삼겹살을, 30, 40대의 경우에는 북미산 냉동 삼겹살에 대한 선호도가 높은 것으로 조사되었다.

• 한국수정란이식학회:학술대회논문집
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• 한국수정란이식학회 2005년도 제5회 발생공학 국제심포지엄 및 학술대회
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• pp.141-142
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• 2005

• Journal of the Korean Wood Science and Technology
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• 제33권2호통권130호
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• pp.24-28
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• 2005

Monte Carlo simulation was performed on theoretical models of plywood warp for southern yellow pine plywood originating from the United States. The objective of the investigation was to determine which plywood layers was more warp sensitive to veneers that were manufactured to an undesired thickness. This study found that for a balanced panel (a panel of equal target thickness for each of five layers) manufactured veneers of undesired thickness would experience minimal warp. The veneers of undesired thickness placed in the center of the plywood panel also provided a minimum change of plywood warp properties. The panel warp was very sensitive to surface veneers constructed with undesired thickness. Conversely, this study confirms that monitoring of veneer thickness and proper allocations within the plywood lay-up were critical.