Korean Journal of Agricultural and Forest Meteorology
/
v.23
no.1
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pp.15-33
/
2021
In this study, the possibility of discriminating Fire blight (FB) infection tested using the hyperspectral imagery. The reflectance of healthy and infected leaves and branches was acquired with 5 nm of full width at high maximum (FWHM) and then it was standardized to 10 nm, 25 nm, 50 nm, and 80 nm of FWHM. The standardized samples were divided into training and test sets at ratios of 7:3, 5:5 and 3:7 to find the optimal bands of FWHM by the decision tree analysis. Classification accuracy was evaluated using overall accuracy (OA) and kappa coefficient (KC). The hyperspectral reflectance of infected leaves and branches was significantly lower than those of healthy green, red-edge (RE) and near infrared (NIR) regions. The bands selected for the first node were generally 750 and 800 nm; these were used to identify the infection of leaves and branches, respectively. The accuracy of the classifier was higher in the 7:3 ratio. Four bands with 50 nm of FWHM (450, 650, 750, and 950 nm) might be reasonable because the difference in the recalculated accuracy between 8 bands with 10 nm of FWHM (440, 580, 640, 660, 680, 710, 730, and 740 nm) and 4 bands was only 1.8% for OA and 4.1% for KC, respectively. Finally, adding two bands (550 nm and 800 nm with 25 nm of FWHM) in four bands with 50 nm of FWHM have been proposed to improve the usability of multispectral image sensors with performing various roles in agriculture as well as detecting FB with other combinations of spectral bands.
Journal of agricultural medicine and community health
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v.30
no.2
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pp.205-211
/
2005
Objectives: In Ulleung island, many people was suffered from dermatomycosis. But many patients was not recognized to dermatomycosis due to little symptom. So, public health education was needed. We will plan education direction based on evidence. So, in one way, the recognition level was needed to determine education direction. Methods: From June to July in 2005, 45 patients was made a question. The questionnaire was composed of chief complaint, site, duration, similar disease in family, 5 questiones and so on. If patients was recognized to 1 question, 1 score was added. Remain 4 question was done in same manner. Results: The low score group were that total socre was beyond 2. And The high score group were that total score was above 3. The low score group was 24 persons, average age was 59. The high score group was 21 persons and average age was 42. Male and female ratio was 7 : 17 in low score group and 10 : 11 in high score group. Coinfection was 17 patients in low score group and 2 patients in high score group. There was only 17 patients that wete recognized that dermatomycosis and "Moozom" were same disease. And, many patients was not recognized to possibility of reinfection after treatment of dermatomycosis. Conclusions: In Ulleung island, coinfection rate was higher than other area bacause of low recognition level. And infection rate in family was higher too. So, there was essential to educate of dermatomycosis prevention. Dermatomycosis patient became older and was more female than other area, so there was need to centralize people to be needed of public health education. Finally, many statistical study for dermatomycosis should be needed for many patients and general populations in Ulleung island.
Influnces of Fuiarium solani and Phytophthora cactorum infection on the changes in saponin components of Korean ginseng (Panax ginseng C.A. Meyer)roots and some of the biology of those fungi in relation to ginseng root were investigated. Mycelial growth of F. solani was decreased as increasing concentration of the water extracts of fresh ginseng roots, while that of P. cactorum was increased as increasing the concentration of the water extracts and crude saponin. Mycelial growth of F. solani, however, was increased as increasing concentration of crude ginseng saponin upto 20 ppm, while it was tended to be decreased when the concentration was higher than 50 ppm. Nystatin also suppresed the growth of F. solani as increasing its concentration, but it did not affected on the growth of p. cactorum. Ginsenoside Ra and Ro components were not detected in ginseng roots inoculated with F. solani or P. cactorum. Panaxadiol gisenosides were increased by 3.0%, whereas panaxatriol ginsenosides were decreased by 34.9% in ginseng roots inoculated with F. iolani. In ginseng roots inoculated with P. cactorum panaxadiol ginsenosides were increased by 21.1%, but panaxatriol ginsenosides were decreased by 23.5%. PD/PT ratio in ginseng roots inoculated with F. solani or P. cactorum were equally increased by 58.4% in spite of differences in the change of panaxadiol and panaxatriol ginsenosides. The total saponin components of ginseng roots inoculated with F. solani or P. cactorum were decreased by 17.8% and 2.5%, respectively.
Bang, Seok Jin;Lee, Chan Heun;Kang, Tae Yun;Choi, Jae Hyeok;Jung, Sang Mok;Kang, In Sung;Park, Kwan Ha;Choi, Sang Hoon
Journal of fish pathology
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v.32
no.2
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pp.105-111
/
2019
Citurs unshiu Markovich is a medicinal product of dried tangerine peel (DTP). It is effective on antioxidation, and getting fame as a medicine and functional food. By utilizing DTP as a feed additive, we aim to enhance the growth rate, innate immunity, and bacterial infection resistance to Tilapia. The DTP extract was added to the feed weight by 0.1, 0.5, 1, 5% and then fed to tilapia for 7 days to evaluate the innate immunity parameter, growth rate and anti-bacterial activity. Innate immunity parameter results showed that the ROI was significantly higher in the 5% group added at high concentration, while showing decrease or no differences in other experimental groups. In other parameters, all the experimental groups showed no significant difference or decreased compared to the control group. The challenge test showed a high survival rate of 71% in the 0.5% group and the lowest in the control group (36%). For the growth rate, the feed efficiency was improved in all groups except for the 0.1% group compared to the control group. In conclusion, DTP extract has bacterial resistant effect in while not affecting innate immune system of fish. Also, it has shown the potential as a possible feed additive as it has brought the improvement on feed efficiency ratio.
Purpose: Well vascularized pectoralis major myocutaneous flap (PMMF) had been a commonly used versatile flap in reconstructive oromaxillofacial surgery since the 1970s. However, after the advent of microvascular surgery in the 1980s, the PMMF was used less frequently. But, to date, PMMF has been useful and has some advantages such as covering wide defects, covering vital structures, back-up procedure in cases of free flap failure, and reconstruction for radiotherapy patients. The purpose of this study is to evaluate the role, indication, complications, functional, and aesthetic results of this flap in the era of free flap with a literature and chart review. Methods: A retrospective study was conducted of 16 oral cancer patients undergoing reconstructive surgery with PMMF for reconstruction of defects from 2001 to 2012 at Kyungpook National University Hospital. The male to female ratio was 10:6, with a mean age of 63 years (16~79 years). Basic demographic data, previous treatment history, indications, dimension of the flap, site of reconstruction, postoperative complications, and patients' final status were systemically analyzed from chart review. Results: The pathology of the disease included squamous cell carcinoma in the majority of cases (n=14). The remaining cases were fibrosarcoma and mucoepidermoid carcinoma. Of the 16 PMMF reconstructions, 13 flaps were applied as primary reconstructive procedures, whereas three flaps were; salvage; procedures (vascularized free flap failure). Twelve patients had complications such as wound dehiscence, infection, hematoma, fistula, flap bulkiness, and partial flap necrosis. The higher complication rates showed an association with utilization of the flap in preoperative radiotherapy cases. However, all patients were discharged without failure. Conclusion: In reconstructive oromaxillofacial surgery, the PMMF is still a useful flap for huge defects. In addition, the PMMF can be used as a salvage procedure after vascularized free flap failure and reconstruction for patients with a history of preoperative radiotherapy.
Journal of the Korean Association of Oral and Maxillofacial Surgeons
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v.27
no.2
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pp.167-173
/
2001
Cystic lesion of the jaw are frequently encountered clinically. Although they rarely lead to development of tumors, they can result in resorption of the jaw bone or asymmetry of the face may occur. The purpose of this study is to find the clinical and histopathological pattern of cysts and to help better understanding for the diagnosis and treatment of jaw cysts. The hospital chart, out-patient chart, panorama X-ray, histopathological report and operation report of 246 patients were reviewed who had been diagnosed as cyst. Sex distribution, age distribution, classification, anatomic distribution, clinical sign & symptoms, treatment, post-operation complications, recurrence rate were studied. Then significant difference between the diameter of cyst with bone graft and none-bone graft was calculated with SAS program. The results were as follows. 1. Among the total patient of 246 cases, male were 163 case(67.0%), and female were 83 case(37.0%), male predominated by the ratio of 1.98. 2. By age group, the 20's accounted for the largest proportion of the cases(27.2%) and the 30' accounted for the 2nd largest proportion of the case(19.5%). 3. Radicular cyst and dentigerous cyst were most common cysts, irrespective of 166 case(67.5%) and 62 case(25.2%). 4. Clinical sign & symptoms were swelling(167case), pain(85case), pus discharge(53case), teeth discoloration(28case), indicating that most complaints were related to inflammation and facial asymmetry. 4.9% of the total cases were discovered accidentally. 5. The primary site of cysts were maxillary anterior area(43.9%), the others were, in descending order, mandibular posterior area(25.6%), maxillary posterior area(14.6%). 6. Enucleation with endodontic treatment was a main treatment method(133 case, 54.1%) and 38 cases(15.4%) were enucleation with extraction, and 37 cases(15.0%) were only enucleation, and 21 cases(8.5%) were enucleation with bone graft. 7. The average diameter of cysts with bone graft was significally greater than with non-bone graft(p<0.05). 8. Post-operation complications occurred in 10 case(4.1%), all of this were due to secondary infection.
During 7 years, from Jan. 1986 to Dec. 1992, authors studied 208 cases of the surgically managed thyroid nodules at the Department of General Surgery, Han Kang Sacred Heart Hospital and obtained the following results. 1) Among the total 208 cases, male to female ratio was 1:11.2 in benign thyroid diseases and 1:9 in malignant thyroid diseases. The benign disease was prevalent between second and forth decade comparing with malignant disease between third and fifth decade. 2) The most common duration of illness was 3 months(26.0%). 3) Palpable neck mass was the most common chief complaint(100%). Palpitation. fatigue, and sweating were common complaints in patient with benign disease, and fatigue, palpitation, and sweating in malignant disease in decreasing order of frequency. 4) 55.8 % of lesions were in right lobe, 33.2% in left lobe, 5.8% in diffuse type, 4.8% in bilateral lobes, and 0.5% in isthmus. 5) The most common size of nodule was between 2.0cm and 3.9cm in diameter, which consisted of 55.1% of benign disease and 48.0% of malignant disease. 6) 86.5% of thyroid function test showed euthyroidism, 10.1% hyperthyroidism, and 3.4% hypothyroidism. 7) Thyroid scanning of 176 patients revealed cold nodules in 92.5% of benign diseases and in 92.9% of malignant diseases. 8) The most common benign disease was adenomatous hyperplasia(62.7%), and the most common malignant disease was papillary adenocarcinoma(80.0%). 9) Fine needle aspiration cytology was performed in 91 cases, and it showed 69.0% of sensitivity, 90.3% of specificity, and 83.5% of accuracy. 10) Frozen biopsy was performed in 109 cases. and it showed 93.9% of sensitivity, 100.0% of specificity, and 98.2% of accuracy. 11) The most commonly performed operation was unilateral lobectomy(including unilateral lobectomy with isthmectomy)(79.1%) in benign disease. and total thyroidectomy(62.0%) in malignant disease. 12) Postoperative complication showed 5 cases of wound infection (2.4%), 3 cases of transient hypoparathyroidism(1.4%), 3 cases of transient hoarseness(1.4%), 2 cases of postoperative bleeding(1.0%), 1 case of permanent hypoparathyroidism(0.5%), 1 case of permanent hoarseness(0.5%), and 1 case of postoperative pneumonia (0.5%).
Purpose : There was an epidemic of aseptic meningitis in Korea for 3 years from 1996 to 1998. In this study, we reported the time of outbreak, age and sex distribution, clinical manifestations, laboratory data, and complications of the children with aseptic meningitis. Methods : We reviewed clinical records of 192 aseptic meningitis patients who had been admitted to Pohang St. Mary's Hospital from 1996 to 1998. Results : Aseptic meningitis occurred most frequently in July and August. The ratio of male to female was 1.91 : 1, and the most prevalent age was 1 to 5 years of age. The main symptoms were fever, vomiting, headache in this order of frequency. Peripheral blood showed leukocytosis(WBC > $10,000/mm^3$) in 44.3% of the cases. CSF examination showed WBC count were less than $500/mm^3$ in 88.0%, protein levels less than 40 mg/dL in 61.5%, and glucose levels more than 40 mg/dL in 94.3% of the cases. We did not isolate the causative viral agents. Conclusion : Aseptic meningitis was prevalent in children in the Pohang area from 1996 to 1998. Clinical manifestations and CSF profiles of aseptic meningitis patients showed no great difference compared to other reported.
Purpose : Kikuchi disease is a subacute necrotizing lymphadenitis characterized by fever, cervical lymphadenopathy and benign self-limiting course in young women especially, but rare in children. Their etiopathology is still unknown, but involved viruses and autoimmune mechanism were proposed. We investigated the clinical and laboratory characteristics of Kikuchi disease in children. Methods : Five patients were diagnosed of Kikuchi disease from January 2001 to June 2006 in Kyunghee University Hospital. We reviewed their medical records retrospectively and analyzed clinical and laboratory findings. Results : The mean age of 5 patients (male to female ratio; 2:3) was 9 yr 9 mon(range: 8 yr 2 mon-12 yr 6 mon). The chief complaints were sustained fever and cervical lymph node that was unilateral, tender and swollen. All patients were treated with antibiotics before diagnosis was made, and rash developed in 2 patients. One patient showed necrotic change in ultrasound with which we suspected Kikuchi disease. Three patients were examined by CT scan additionally. The interval between admission and cervical lymph node excisional biopsy ranged from 6 days to 15 days, and mean period was 9.6 days. All pathological findings were compatible to necrotizing lymphandenitis. Conclusion : Unnecessary laboratory and imaging studies, and treatment with antibiotics tend to be done before making diagnosis, and that caused prolonged hospitalization. Therefore we studied the clinical and laboratory characteristics of Kikuchi disease in children.
Byun, Hwa Kyung;Yoon, Hong In;Cho, Jaeho;Kim, Hyun Ju;Min, Yoo Hong;Lyu, Chuhl Joo;Cheong, June-Won;Kim, Jin Seok;Kim, Hyo Sun;Kim, Soo-Jeong;Yang, Andrew Jihoon;Lee, Byung Min;Lee, Won Hee;Lee, Joongyo;Ahn, Ki Jung;Suh, Chang-Ok
Radiation Oncology Journal
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v.35
no.3
/
pp.257-267
/
2017
Purpose: Pulmonary toxicities, including infectious pneumonia (IP) and idiopathic pneumonia syndrome (IPS), are serious side effects of total body irradiation (TBI) used for myeloablative conditioning. This study aimed to evaluate clinical factors associated with IP and IPS following TBI. Materials and Methods: Fifty-eight patients with hematologic malignancies who underwent TBI before allogeneic hematopoietic stem cell transplantation between 2005 and 2014 were reviewed. Most patients (91%) received 12 Gy in 1.5 Gy fractions twice a day. Pulmonary toxicities were diagnosed based on either radiographic evidence or reduced pulmonary function, and were subdivided into IP and IPS based on the presence or absence of concurrent infection. Results: Pulmonary toxicities developed in 36 patients (62%); 16 (28%) had IP and 20 (34%) had IPS. IP was significantly associated with increased treatment-related mortality (p = 0.028) and decreased survival (p = 0.039). Multivariate analysis revealed that the risk of developing IPS was significantly higher in patients who received stem cells from a matched unrelated donor than from a matched sibling donor (p = 0.021; hazard ratio [HR] = 12.67; 95% confidence interval [CI], 1.46-110.30). Combining other conditioning agents with cyclophosphamide produced a higher tendency to develop IP (p = 0.064; HR = 6.19; 95% CI, 0.90-42.56). Conclusion: IP and IPS involve different risk factors and distinct pathogeneses that should be considered when planning treatments before and after TBI.
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