Abstract: A portable satellite communication apparatus constituted by a body portion and an antenna portion, wherein the antenna portion is attached on an azimuth angle adjustor provided on the body portion so that the upper surface of the antenna portion is made to be the transmission/reception direction of radio waves and the antenna portion is made rotatable so as to act also as a cover for covering the body portion. The antenna portion can be adjusted with respect to its azimuth angle, elevation angle and polarization angle. A panel portion and a handling instruction indicating portion are provided on the upper surface of the body portion and a lamp is provided on the antenna support portion so as to illuminate the panel portion and the handling instruction indicating portion to facilitate the handling of the apparatus in the night or the like.

Abstract: A material for removing human immunodeficiency virus (HIV) and its related substances from blood, plasma, or other body fluids is provided. The material comprises a porous substrate on which sulfuric group substantially in the form of a salt is immobilized. A convenient removal of HIV and its related substances at a high efficiency is enabled by the use of the material.

Abstract: A material wherein a polyamine compound is immobilized on its base surface and a blood filter using this material. The material is provided in the form of a porous membrane having the maximum pore diameter of 0.1-50 .mu.m. The polyamine compound is at least one compound selected from the group consisting of (a) a polyamine compound which has primary and secondary amines in its molecule and a hydrophobic part between these amines, (b) a polyamine compound represented by the following formula (I); ##STR1## wherein R.sup.1, R.sup.2, R.sup.3, R.sup.4 and R.sup.5 represent hydrogen, aliphatic and aromatic hydrocarbons, and halogen, and n is 5 or more, and (c) a polyamine compound represented by the following formula (II); ##STR2## wherein R represents NH.sub.2 or aminoalkyl radical having 1 to 4 carbon atoms and n is 5 or more. The blood filter comprises a housing which has an inlet and outlet, and the material arranged inside the housing.