Intramural dissection of the esophagus is a rare esophageal disorder that is characterized by a long laceration between the esophageal mucosa and submucosa but without perforation. It reveals characteristic radiologic and endoscopic features. The etiology of intramural dissection of the esophagus remains uncertain. The most common presenting symptoms are sudden retrosternal pain, hematemesis, odynophagia, dysphagia, and back pain. Conservative management is usually thought to be adequate. We report a case of spontaneous intramural esophageal dissection, in which the symptom of dysphagia did not improve with the conservative management, and an endoscopic incision of the septum between true and false lumens using a needle-type diathermy knife was done safely and effectively.
SPT of the pancreas is an unusual neoplasm and typically occurs in young females presenting well-demarcated pancreatic masses, which are amenable to cure by complete surgical resection.
Pseudomembranous colitis (PMC) is known to develop after antibiotic administration, but antituberculosis agents are rarely associated with this disorder. We report 6 cases of PMC after rifampicin administration; the clinical manifestations, laboratory findings, imaging findings, and clinical course are described. The median age of patients was 68 years (range, 54 to 82 y). All patients were diagnosed with active pulmonary tuberculosis by sputum smear and culture, and 2 suffered from type 2 diabetes mellitus. The average interval between initiation of antituberculosis therapy and the onset of diarrhea was 19.8 days. The anatomic distribution of PMC included the rectum and sigmoid colon in 5 cases and up to the hepatic flexure in 1 case. All patients were cured with medical treatment, which include discontinuation of rifampicin and oral metronidazole and vancomycin. PMC recurred in 1 patient after retreatment with rifampicin. Our findings suggest that patients who are treated with antituberculosis agents, who develop acute diarrhea during or after therapy, should be evaluated for PMC.
Increased application of nitrogen (N) fertilizer top-dressing during growth is an effective option for enhancing N supply to soybean plants. SS2-2 was characterized by the superior ability of symbiotic N2 fixation at the level of 30 kg N ha -1 . But, the response of nitrogen fixation ability of supernodulating soybean mutant, SS2-2, to N fertilizer application rate remains unclear. The objective of this experiment was to compare the response of N fertilizer top-dressing on N accumulation and N2 fixation between supernodulating mutant, SS2-2, and wild-type, Sinpaldalkong 2. The effect of N fertilizer top-dressing (0.6 g N pot -1 top-dressing) on the nitrogen accumulation and redistribution were compared between SS2-2 and Sinpaldalkong 2. N fertilizer top-dressing at R1 stage increase in plant dry weight, relative growth rate (RGR), net assimilation rate (NAR), nitrogen harvest index (NHI), and N redistribution (NR). SS2-2 showed highest N concentration, 65.0 mg N g DW -1 , followed by Sinpaldalkong 2 and En1282, and the N content per plant did not show a significant difference between SS2-2 and Sinpaldalkong 2. The N2 fixation rate was significantly reduced by N top-dressing, but the amount of N2 fixation was not changed due to an improved dry weight without changes of N concentration. In addition, SS2-2 showed higher NHI, NR and NRE than Sinpaldalkong 2. These results suggested that supernodulating soybean mutants, SS2-2, could be characterized by high N concentration and N2 fixation regardless of N fertilizer top-dressing due to a higher nitrate tolerance of supernodulating mutants than that of wild-type.
A new single cross hybrid, 'Guseulok', is a bicolor sweet corn (Zea mays L.) developed by the maize breeding team at the National Institute of Crop Science (NICS), RDA in 2009. This hybrid, which has a good eating quality and high sugar content, was produced by crossing two inbred lines, KSE19 and KSE7. KSE19 was the seed parent and KSE7 was the pollen parent of 'Guseulok'. Ear length and diameter of 'Guseulok' were 18.0 cm and 4.6 cm, respectively. The ratio of kernel set length/ear length was 90%, similar with that of a check hybrid, 'Golden Cross Bantam70' (GCB70). However, the free sugar content was 20.5%, higher than 'GCB70', 14.0%. It is resistant to Bipolaris maydis (Southern corn leaf blight) and its lodging resistance is excellent. The yields of 'Guseulok' in fresh ear weight were similar with those of GCB70 in regional yield trials (RYT) from 2007 to 2009. Seed production of this hybrid has gone well due to good match during crossing between the seed and pollen parents. It is adaptable to the whole country. Plant variety protection right of 'Guseulok' was registered in January 2013, and its grant number is 4322.
It is known that silk protein supports effectively proliferation of cell such as insect cell and hybridoma cell. Although there are many varieties of Bombyx mori silkworm, the effect of silkworm varieties on cell proliferation has not been considered in detail. We studied that characteristics of silk cocoon obtained from Baegokjam, Kumokjam, Daeseongjam silkworm varieties and whether silk protein affected cell proliferation or not. Silk sericin was prepared under high temperature and high pressure condition. Silk fibroin was prepared using CaCl 2 : H 2 O : EtOH with different dissolution time. As a result, there are differences in silk cocoon from different silkworm varieties about cell proliferation. The proliferation was accelerated in the presence of Baegokjam silk sericin and Kumokjam silk fibroin with 5hr dissolution time. We expect that silk proteins could be a preferable culture medium supplement for stimulating the proliferation of cell. Then, this results suggest silk as a new material for medium supplement replacing with fetal bovine serum.
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