Abstract: There is here disclosed a method for preparing an alkoxyphthalocyanine represented by the formula (1): ##STR1##

Abstract: A method for diagnosing contraction or progress of periodontal diseases is carried and by determining periodontopathic bacteria specific aminopeptidase activity in a specimen by using as a substrate for the enzyme. The substrate is either or both compounds of the formula:X--Z--Arg--Y [1]wherein Arg is arginine residue; X is or an amino blocking group; Y is a color developing group attached to the C-terminal of Arg; and Z is an amino acid or peptide residue composed of 1 or 2 amino acids or their blocked derivatives, the C-terminal of which is attached to the N-terminal of Arg, andX'--Z'--Pro--Y' [2]wherein Pro is proline residue; X' is an amino blocking group; Y' is a color developing group attached to the C-terminal of Pro; and Z' is an amino acid or peptide residue composed of 0 to 4 amino acids or their blocked derivatives, the C-terminal of which is attached to the N-terminal of Pro.

Abstract: A pair of binoculars including a mechanism for adjusting the optical distance between objective lenses and ocular lenses so as to set the focus to the user's visual acuity. The visual acuity compensating mechanism is incorporated into the ocular lens side or the objective lens side. The pair of binoculars may be corrected to the focus meeting the user's visual acuity when the user begins use of the binocular.

Abstract: A pharmaceutical or veterinary composition for activating the function of phygocytes comprising as an effective ingredient a certain tocopheryl glycoside. The composition is useful for treating infectious diseases and malignant tumor.

Abstract: An apparatus for furling a sail on a sailboat having a mast includes a stay extending between the deck and the mast on the sailboat, a hollow shaft loosely fitted over the stay and supporting the side edge of the sail, the hollow shaft being rotatable about the stay such that the sail can be wound and unwound about the hollow shaft, at least one ring member disposed around the shaft and having an opening which permits the sail to move onto the shaft therethrough, and wire ropes extending between the deck and mast on the sailboat and supporting the ring member about the shaft.

Abstract: A zoom mechanism particularly for a compact zoom binocular, comprises right and left ring gears which respectively surround right and left light beams passing through right and left eye lenses of the binoculars. The eye lenses are pivotally connected to each other about a machine shaft for adjusting the width between light beams and adjustment elements are provided for adjusting the magnification of the eye lenses. Right and left intermediate gears are respectively engaged with the right and left ring gears and disposed between the ring gears. The intermediate gears are connected to the magnification elements for adjusting magnification and for rotating the ring gears. An engagement assembly is provided between the intermediate gears which is either in the form of a central gear or a belt and pulley combination so that rotation of one intermediate gear is transmitted to the other intermediate gear. The engagement assembly is concentric with the machine shaft axis.

Abstract: An analog waveform is sampled and converted into a digital form corresponding to the number of picture elements in the direction of main scanning of a raster scanning type display unit. The digital value thus obtained is stored in a memory which has the same number of addresses as the above-mentioned number picture elements. All memory locations are sequentially read out, for each main scan of the display unit. The data A.sub.1 contained in each location is compared to the number of the current scanning line B.sub.1 of the display unit. When the data read out, A.sub.1, equals the number, B.sub.1, a video signal is applied to the display unit, resulting in a bright spot being displayed on the display surface of the display unit. When a waveform video signal is formed, corresponding to the states of A=B or A>B, the area under the waveform is displayed by dots.

Abstract: An improvement in zoom binoculars is disclosed which utilizes a small gear rotated by a larger drive gear connected to a pivotally mounted lever for transmitting rotation to one of two intermediate gears which are meshed to each other through free central gear. Each intermediate gear is meshed with a tube gear connected to a tube lens. Each intermediate gear with its meshed tube gear is rotatably mounted on one of a pair of binocular body portions which are pivotally mounted to each other. The pivotally mounted body portions can be pivoted with respect to each other to change the spacing between lens tubes. Due to the small size of the small gear, such pivoting of the body portions produces only a small differential rotation between the two intermediate gears, and thus a small differential and magnification throughout the entire range of magnification for the zoom binoculars.

Abstract: In brazed aluminum heat exchangers of plate type composed of piled heat exchanger units each comprising corrugated fin within the space defined by two sheets and side bars arranged at both ends of the plates, an improved heat exchanger comprising placing a thick bare member on the brazing sheet of the outer plate materials of the outermost units as a reinforcing member and brazing integrally by fluxless brazing procedure, thereby eliminating any special member.

Abstract: The invention involves to improvements in heat sink. Required numbers of corrugated fins and separator sheets are alternately stacked together with side bars applied to the opposite edges of each corrugated fin, and all the parts are brazed together.Large thickness side bars are used for either one side or both sides, and the edges of the separator sheets and outer sides of the side bars are aligned, and a heat source is mounted on the outer surfaces of side bars. In this way, a heat sink of a desired sides can be assemble, and also the heat radiator performance can be improved.

Abstract: A test composition for evaluating dental caries activity, which comprise a specific amount of a saccharide (e.g. sucrose, glucose and fructose) and a pH indicator (e.g. resazurin, lacmoid, methyl red and alizarin) in water or an aqueous alcohol solution, said composition being regulated to a pH range of 6.5 to 7.0 with an alkali (e.g. sodium hydroxide) and an acid (e.g. acetic acid, tartaric acid or lactic acid). By using this test composition, a test for evaluation dental caries activity can be done within a very short period of time (e.g. about 30 minutes) by any person without requesting any specific training.

Abstract: The invention involves to improvements in heat snk. Required numbers of corrugated fins and separator sheets are alternately stacked together with side bars applied to the opposite edges of each corrugated fin, and all the parts are brazed together.Large thickness side bars are used for either one side or both sides, and the edges of the separator sheets and outer sides of the side bars are aligned, and a heat source is mounted on the outer surfaces of side bars. In this way, a heat sink of a desired sides can be assemble, and also the heat radiator performance can be improved.

Abstract: Failure under stress of brazed aluminum assemblies prepared by fluxless brazing is prevented by controlling the grain size before brazing of the material in contact with the brazing alloy to be at least 60.mu..