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증례보고 : 난치성 대상포진 후 신경통 환자에서 Alcohol을 이용한 척수 신경파괴술
정석호 ( Seok Ho Jung ),전영훈 ( Young Hun Jeon ),홍정길 ( Jung Gil Hong ) 대한마취과학회 2006 Korean Journal of Anesthesiology Vol.51 No.5
Postherpetic neuralgia (PHN) is a sequela of acute herpes zoster infection and is defined as pain persisting more than 1 month. The patients with PHN suffer from a persistent neuropathic pain. There are many treatments for PHN but some people occasionally do not respond to the conventional therapies. Neurodestruction using neurolytic agents are beneficial to patients with severe intractable pain because of it`s prolonged pain-relief and simplicity, inexpensiveness. We report a case that we managed successfully a patient with intractable thoracic PHN using intrathecal alcohol neurolysis. (Korean J Anesthesiol 2006; 51: 655~8)
질산태 질소 정량을 위한 환원 증류법에서 Devarda’s Alloy의 입자크기 및 함량이 미치는 영향
정석호(Seok Ho Jung),권현재(Hyun Jae Kwon),정덕영(Doug Young Chung),한광현(Gwang Hyun Han) 韓國土壤肥料學會 2011 한국토양비료학회지 Vol.44 No.3
We analyzed the particle size distributions of three commercially available Devarda’s alloy (DA) products, tested the nitrate recoveries of each particle size category, and examined the amounts of DA required for 100% recovery by varying NO3−N concentration from 0.5 to 10 mg. We observed that use of DA coarser than 200 mesh resulted in poor analytical recovery (< 80%). While the tested alloys were considered to be fine enough (>90% of the particles were less than 100 mesh), the recovery dramatically declined from 80% to 10% in a high concentration range (4 to 10 mg N). Satisfactory recovery was obtained by increasing the amount of finer DA (less than 300 or 450 mesh). However, there was no quantitative relationship between the amount of fine DA and nitrate recovered. Generally, the amount of nitrate reduced per unit DA decreased as the recovery efficiency declined. These results suggest that a sufficient amount of DA must be determined based on particle size distribution, and that treatment of at least two levels of DA and comparison of the subsequent change in nitrate recovery is required for soils containing high levels of nitrate. In addition, further studies are encouraged to account for the observed stoichiometric dis-equivalence of recovered nitrate N per unit mass of DA.