RESUMEN
On-line control of raw mill feed composition is a key factor in the improved control of cement plants. A new and improved on-conveyor belt elemental analyser for cement raw mill feed based on neutron inelastic scatter and capture techniques has been developed and tested successfully in Adelaide Brighton's Birkenhead cement plant on highly segregated material with a depth range of 100 to 180 mm. Dynamic tests in the plant have shown analyser RMS total errors of 0.49, 0.52, 0.38 and 0.23 wt% (on a loss free basis) for CaO, SiO2, Al2O3 and Fe2O3 respectively, when 10-minute counting periods are used.
Asunto(s)
Materiales de Construcción/análisis , Industrias , Óxido de Aluminio/análisis , Compuestos de Calcio/análisis , Compuestos Férricos/análisis , Rayos gamma , Neutrones , Óxidos/análisis , Reproducibilidad de los Resultados , Dispersión de Radiación , Dióxido de Silicio/análisisRESUMEN
Radioiodinated meta-iodobenzylguanidine, a recently developed radiopharmaceutical, has been shown to permit safe, noninvasive, sensitive, and specific scintigraphic location of pheochromocytomas of all types. The technique is especially efficacious in the case of extraadrenal primary lesions and locally recurrent and metastatic tumors. In addition to being taken up by pheochromocytomas, meta-iodobenzylguanidine may be used to image neuroblastomas, nonfunctioning paragangliomas, and carcinoid tumors. Lesions with high 131I-meta-iodobenzylguanidine uptake may respond to treatment with large doses of this radiopharmaceutical.
Asunto(s)
Neoplasias de las Glándulas Suprarrenales/diagnóstico por imagen , Radioisótopos de Yodo , Yodobencenos , Feocromocitoma/diagnóstico por imagen , 3-Yodobencilguanidina , Neoplasias de las Glándulas Suprarrenales/radioterapia , Adulto , Anciano , Niño , Femenino , Humanos , Radioisótopos de Yodo/uso terapéutico , Yodobencenos/uso terapéutico , Masculino , Persona de Mediana Edad , Feocromocitoma/radioterapia , CintigrafíaRESUMEN
Hyperbaric oxygen and the vasodilating effect of tolazoline hydrochloride were used to investigate atherosclerotic ischaemia of the skin of the foot. Ischaemic feet were divided into two subgroups each with a foot blood flow significantly higher than normal and significantly different from each other. The high blood flow in the ischaemic feet appears to have been an attempt to meet a tissue oxygen need. In some instances this need seems to have been satisfied but without obvious benefit to the ischaemic or anoxic skin. It is suggested that a local rather than a regional blood flow insufficiency is the cause of skin lesions in peripheral vascular disease.