RESUMO
A high-throughput gas adsorption apparatus is presented for the evaluation of adsorbents of interest in gas storage and separation applications. This instrument is capable of measuring complete adsorption isotherms up to 40 bar on six samples in parallel using as little as 60 mg of material. Multiple adsorption cycles can be carried out and four gases can be used sequentially, giving as many as 24 adsorption isotherms in 24 h. The apparatus has been used to investigate the effect of metal center (MIL-100) and functional groups (CAU-10) on the adsorption of N(2), CO(2), and light hydrocarbons on MOFs. This demonstrates how it can serve to evaluate sample quality and adsorption reversibility, to determine optimum activation conditions and to estimate separation properties. As such it is a useful tool for the screening of novel adsorbents for different applications in gas separation, providing significant time savings in identifying potentially interesting materials.
Assuntos
Monóxido de Carbono/química , Monóxido de Carbono/isolamento & purificação , Nitrogênio/química , Nitrogênio/isolamento & purificação , Compostos Organometálicos/química , Pressão , Adsorção , Porosidade , Propriedades de SuperfícieRESUMO
OBJECTIVE: To explore the difference between distinct methods of assessing blood pressure (BP) in pregnant women with different hypertensive disorders. METHODS: We compared office BP to home patient- and nurse-measured diastolic BP in pregnant women with essential chronic hypertension (CH), preeclampsia (PE) and isolated hypertension (IOH). RESULTS: Office BP was lower or similar to home patient- and nurse-measured BP in women with CH. Office BP was higher than home patient-measured BP in women with PE and in women with IOH (p < 0.0001). Nurse-measured BP was higher than patient-measured BP in women with PE (p < 0.01). CONCLUSIONS: BP assessments in women with PE are significantly influenced by the environment, which should be considered in managing these women.
