Nonthermal plasma technologies offer an innovative approach to the problem of decomposing various volatile organic compounds (VOC's). We focused on dc capillary tube discharge plasma reactors to study the decomposition/destruction efficiency for toluene, EGM, trichloroethane, and trichlroethylene at 50-2300-ppm levels in dry air. The effects of gas flow rate, VOC concentration, and reactor operating conditions on decomposition and analysis of reactant conversion for each VOC were investigated. The results show that VOC destruction efficiency as high as 90% can be achieved, even under a short residence time (3.8 ms) with a destruction energy efficiency of up to 95 g (VOC)/kWh. Laboratory-scale plasma technology was successfully demonstrated for its potential application for VOC control in the semiconductor clean-room environment.
The authors report 4 cases of Charcot spine treated surgically. In the surgical treatment, combined anterior and posterior with extensive debridement, autogenous bone grafting, and posterior instrumentation is the main therapeutic modality. Some cases with mild bone destruction could be treated by posterior interbody fusion. For the unstable, symptomatic Charcot spine, surgical treatment can provide excellent results.
Nonthermal plasma technologies offer an innovative approach to the problem of decomposing various volatile organic compounds (VOCs). We focused on an AC-energized ferroelectric packed-bed plasma reactor to study the decomposition/destruction efficiency and byproduct analysis for toluene, o-xylene, trichloroethylene, and their mixture from 50 to 230 ppm in dry air. The effects of gas flow rate, concentration, moisture content, and reactor operating conditions on the decomposition and analysis of reactant conversion for each VOC were investigated for suitable applications of the emerging technology. Laboratory-scale packed-bed plasma technology was successfully demonstrated for the application of VOC control in semiconductor clean room environments.
We report here the case of a 35-year-old man who
presented with inferior vena cava thrombosis
(IVCT) after blunt hepatic trauma. The IVCT was
incidentally detected by computed tomography (CT)
35 days after deep parenchymal suturing and suture
approximation for liver lacerations. The patient
denied any symptoms of thrombophlebitis. However,
he had presented with significantly elevated
values of FDP-D-dimer and a modest increase in
plasminogen concentration, which indicated that he
had been in a hypercoagulable and hypofibrinolytic
state after the operation. He had not undergone any
prophylactic anticoagulant therapy because of his
concomitant subarachnoid hemorrhage and huge
hepatic hematoma. The patient was treated with an
emercy thrombectomy. Posttraumatic IVCT is extremely
rare phenomenon. We should consider IVCT
in patients with a severe hepatic injury, particularly
if their coagulation system change into hypercoagulable
and hypofibrinolytic state. Additionally, this
case made us reflect on the treatment of traumatic
liver injury.
A desiccant air-conditioning system was developed as a latent-load-processing air conditioner in a dedicated outdoor air system during the summer. This study investigated the application of this air-conditioning system to humidification during the winter without using make-up water, thereby eliminating the cause of microbial contamination in air-conditioning systems. The experiments were conducted with a system used for summer applications to determine the feasibility of adsorbing vapor from outdoor air and supplying it to an indoor space. The humidification performance, energy efficiency, and operating conditions were examined. Although the conditions were subpar because the experiments were performed with an actual dedicated outdoor air system, the results showed that it is possible to supply air with a minimum humidity ratio of 5.8 g/kg dry air (DA) when the humidity ratio of outdoor air ranges from 1.8 to 2.3 g/kg DA. The minimum humidification performance required for a dedicated outdoor air system was achieved by increasing the airflow rate of the moisture-adsorption side to 2-3 times that of the humidification side. In addition, air leaking from the moisture-adsorption side to the humidification side, improving the mechanical structure, such as by the insulation of the moisture-adsorption side, and an efficient operating method were examined for humidification during the winter.
A 50-year-old man presented with a 24-h history of gradually worsening abdominal pain. Enhanced computed tomography showed segmental dilation of the small intestine, wall thickening, and ascites, as well as thrombosis of the superior mesenteric vein (SMV) and portal vein. Thus, an emergency laparotomy was performed, which revealed segmental intestinal infarction caused by the thrombosis in the SMV and portal vein. We resected the necrosed intestine and performed anastomosis. The patient was given intravenous heparin and nafamostat mesilate as anticoagulation therapy. The abdominal pain again recurred 4 days after this operation, necessitating a second laparotomy. Segmental congestion of the intestine was found and another resection was done, after which he recovered rapidly. Blood chemistry subsequently revealed an antithrombin III deficiency, which was confirmed to be inherent, after screening his family. Thus, laboratory testing for these proteins may help define the cause of mesenteric venous thrombosis.
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