摘要:
A spiral wound gas permeable membrane module having a hollow mandrel with a plurality of holes, at least one envelope-like gas permeable membrane wrapped spirally around the mandrel, at least one feed water spacer positioned on the outer surfaces of the spirally wrapped envelope-like membrane, and at least one permeation side spacer provided in the envelope-like membrane. The module contains a partition block for blocking the flow of a gas flowing in the mandrel in its longitudinal direction and a flow regulating wall directing the flow of the gas introduced into the envelope-like membrane through the holes aligned on one side of the partition block so that the gas travels in the envelope-like membrane in a spirally outer direction, then returns in a spiral inner direction and flows into the mandrel through the holes aligned on the other side of the partition block. The gas dissolved in raw water supplied to the feed water spacer side is degasified by gas permeation to the permeation side spacer through the membrane which has a broad area for permeation with a high efficiency.
摘要:
Phenethylamine derivatives shown by the general formula ##STR1## wherein Ro represents a lower alkyl group; R.sub.1 represents a lower alkyl group or a lower alkoxy group, R.sub.2 represents hydrogen atom or a hydroxyl group; R.sub.3 and R.sub.4 each represents hydrogen atom or a lower alkyl group; R.sub.5 represents hydrogen atom or a lower alkoxy group; X represents oxygen atom or a methylene group; m is an integer of 1-3; and n is an integer of 0-2and the acid addition salts thereof.These compounds exhibit a strong .alpha.-adrenergic blocking action and are useful as an antihypertensive agent.
摘要:
Novel sulfamoyl-substituted phenethylamine derivatives which exhibit .alpha.-adrenergic blocking action and are useful as an antihypertensive agent and an agent for the treatment of congestive heart failure.