Abstract: A noise-contained voice signal is cepstrum-analyzed to determine a peak and a mean-value thereof. When a peak is present, the signal is determined to be a vowel portion, and when a mean-value is large, the signal is determined to be a consonant portion, thereby allowing a voice portion to be accurately determined. Further, utilizing the detected result, noise is accurately canceled.

Abstract: A cepstrum calculating device obtains a cepstrum of a voice signal and a mean-value calculation device cepstrum means output. A threshold setting device sets a voice detection threshold level on the basis of the cepstrum mean-value output. A cepstrum addition section adds a cepstrum value exceeding the cepstrum mean-value. A comparator compares the cepstrum output from the cepstrum addition section with the threshold output signal from the threshold setting device, thereby to output a voice-detection signal.

Abstract: A signal processing unit separates voice signals and non-voice audio signals contained in a mixed audio signal. The mixed audio signal is channel divided, and the voice signal portions of the channel divided mixed audio signal are detected and extracted at one output. Non-voice audio signals contained in the voice signal portions are predicted based on the non-voice audio signal portions of the mixed audio signal. The thus predicted non-voice audio signals are combined with extracted non-voice audio signals to obtain continuous non-voice audio signals which are output at a second output. Alternately, instead of extracting the voice signals from the mixed audio signal, the predicted non-voice signals are removed from the mixed audio signal to obtain the voice signals which are output on the first output.

Abstract: The compound of the formula ##STR1## wherein R.sup.1 is hydrogen, methoxy or trifluormethyl, R.sup.2 and R.sup.3 are the same or different and are each hydrogen or methyl, R.sup.4 is a fluorinated lower alkyl having 2 to 5 carbon atoms and 1 to 11 fluorine atoms and X.sup.- is a pharmaceutically acceptable anion, respectively, possesses both strong antisecretory activity and gastric mucosal protective activity, which is produced by reacting a pyridine derivative of the formula ##STR2## wherein R.sup.1, R.sup.2, R.sup.3 and R.sup.4 have the same meaning as defined above, with an acid.

Abstract: The compound of the formula ##STR1## wherein R.sup.1 is hydrogen, fluorine, methoxy or trifluoromethyl, R.sup.2 is a C.sub.1-8 alkyl, R.sup.3 is a C.sub.1-8 alkyl which may be fluorinated, and n is 0 or 1, or a pharmacologically acceptable salt thereof is useful for prevention and treatment of digestive ulcers (e.g. gastric ulcer, duodenal ulcer) and gastritis.

Abstract: The compound of the formula ##STR1## wherein R.sup.1 is hydrogen, fluorine, methoxy or trifluoromethyl, R.sup.2 is hydrogen or methyl, R.sup.3 is a C.sub.3-8 straight-chain or branched alkyl, and n denotes 0 or 1, or their pharmacologically acceptable salts is novel and useful for prophylaxis and therapy of digestive ulcers (e.g. gastric ulcer, duodenal ulcer) and gastritis.

Abstract: The present invention relates to novel 2-amino-5-oxo-5H-[1]benzopyrano[2,3-b]pyridine-3-carboxylic acid derivatives useful for prophylaxis and therapy of allergic diseases such as allergic asthma, allergic dermatitis and hay fever, which have the following formula: ##STR1## wherein A is ##STR2## (R, R.sup.1 and R.sup.2 are independently hydrogen or lower alkyl and m is 0 or 1, with the proviso that when m is 1, R.sup.1 is hydrogen) or R--Co-- (R has the same meaning as defined above), or a physiologically acceptable salt thereof, and to a method for preparing the same.

Abstract: A benzoic acid derivative of the formula: ##STR1## wherein R.sup.1 stands for a lower alkyl group, R.sup.2 stands for an optionally protected carboxyl group and X stands for a halogen or a salt thereof, has excellent antiasthmatic and antiinflammatory activities and therefore is useful as an antiasthmatic or antiinflammatory agent for a mammalian animal.

Abstract: The compound of the formula ##STR1## wherein R.sup.1 is hydrogen, methoxy or trifluoromethyl, R.sup.2 and R.sup.3 are independently hydrogen or methyl, R.sup.4 is a C.sub.2-5 fluorinated alkyl and n denotes 0 or 1, or a pharmacologically acceptable salt thereof is novel, and useful for prophylaxis and therapy of digestive ulcers (e.g. gastric ulcer, duodenal ulcer) and gastritis.

Abstract: A diphenoxypropane derivative of the formula: ##STR1## wherein X is a halogen atom, Y is a hydrogen atom or a hydroxy group and Z is a tetrazolyl or carboxy group, has excellent antiasthmatic and antiinflammatory activities, and therefore the diphenoxypropane derivatives are useful as antiasthmatic or antiiflammatory agents.

Abstract: The compound of the formula ##STR1## wherein R.sup.1 is hydrogen, methoxy or trifluoromethyl, R.sup.2 and R.sup.3 are independently hydrogen or methyl, R.sup.4 is a C.sub.2-5 fluorinated alkyl and n denotes 0 or 1, or a pharmacologically acceptable salt thereof is novel, and useful for prophylaxis and therapy of digestive ulcers (e.g. gastric ulcer, duodenal ulcer) and gastritis.

Abstract: A diphenoxypropane derivative of the formula: ##STR1## wherein X is a halogen atom, Y is a hydrogen atom or a hydroxy group and Z is a tetrazolyl or carboxy group, has excellent antiasthmatic and antiinflammatory activities, and therefore the diphenoxypropane derivatives are useful as antiasthmatic or antiinflammatory agents.

Abstract: The present invention relates to novel 5-oxo-5H-[1]benzopyrano[2,3-b]pyridine derivatives useful for effective medicines for the treatment of various connective tissue diseases such as chronic rheumatoid arthritis and varieties of inflammatory diseases caused by immunoreaction, which have the following formula: ##STR1## wherein R is the same or different and represents hydrogen, alkyl, alkoxy, nitro, hydroxyl, acyl, hydroxyalkyl, halogen with the proviso that m is 1,2 or 3, or a tetramethylene (--(CH.sub.2).sub.4 --) or butadienylene (--CH.dbd.CH--CH.dbd.CH--) group which, in conjunction with two adjacent carbon atoms on the ring, forms a six-membered ring with the proviso that m is 1; n is 1 or 2, or a physiologically acceptable salt or ester thereof.

Abstract: Novel 1-azaxanthone-3-carboxylic acid derivatives, which are shown by the following formula (I) ##STR1## wherein R is hydrogen, alkyl, alkoxy or halogen; R.sub.1 and R.sub.2 are the same or different and each is hydrogen, alkyl or alkenyl; and m is 1 or 2; and their physiologically acceptable salts, are usable as effective medicines for preventing and/or treating allergic diseases. The compound of the formula (I) can be produced by reacting a compound of the formula: ##STR2## wherein R and m have the same meaning as defined above; R.sub.3 is carboxyl or group which is convertible into carboxyl through hydrolysis; X is alkyl phosphate radical or halogen, with a compound of the formula: ##STR3## wherein R.sub.1 and R.sub.2 have the same meaning as defined above, or its salt, and conducting hydrolysis, if necessary.

Abstract: The present invention relates to novel 1-azaxanthone-3-carboxylic acid and its derivatives usable for effective medicines for the treatment of allergic diseases, which are shown by the following formula (I) ##STR1## wherein R.sub.1 is hydrogen, alkyl, phenyl, carboxyl, hydroxyl, alkoxy or amino group which may be unsubstituted or substituted by one alkyl, m is 0, 1 or 2 and R.sub.2 is alkyl, alkoxy, halogen, nitro, hydroxy, carboxyl, butadienylene (--CH.dbd.CH--CH.dbd.CH--) which forms a benzene ring with any adjacent carbon atoms or amino group which may be unsubstituted or substituted by at least one alkyl, and their physiologically acceptable salts.

Abstract: Novel 3-(tetrazol-5-yl)-1-azaxanthone and its derivatives, which are shown by the following formula ##STR1## wherein R.sub.1 is hydrogen, amino or hydroxyl; R.sub.2 is alkyl, alkoxy, halogen, nitro, carboxyl, hydroxyl, butadienylene (--CH.dbd.CH--CH.dbd.CH--) which forms a benzene ring with any adjacent carbon atoms or amino group which may be unsubstituted or substituted by at least one alkyl; and m is 0, 1 or 2; and their physiologically acceptable salts, are usable as effective medicines for preventing and/or treating allergic diseases.

Abstract: The present invention relates to novel 1-azaxanthone derivatives, which are shown by the following formula: ##STR1## wherein m is 1 or 2R'.sub.1 is hydrogen, C.sub.1-6 alkyl, phenyl, C.sub.1-6 alkoxycarbonyl, hydroxy, C.sub.1-4 alkoxy, amino or C.sub.1-3 alkylamino;each of R.sub.2 is independently C.sub.1-6 alkyl, C.sub.1-4 alkoxy, halogen, nitro, hydroxy, carboxy, amino, C.sub.1-3 alkylamino or di(C.sub.1-3 alkyl) amino; orwhen m is 2, the two R.sub.2 groups may be independently as defined above or may form together with adjacent rings carbon atoms the butadienylene group;R.sub.3 is cyano, C.sub.1-6 alkoxycarbonyl, carboxamide, N-C.sub.1-3 alkylcarboxamide or N,N-di(C.sub.1-3 alkyl) carboxamide.The novel derivatives are useful as intermediates for 1-azaxanthone-3-carboxylic acid derivatives having effective antiallergic and bronchodilating activities.

Abstract: A method of roducing .gamma.-Fe.sub.2 O.sub.3 magnetic disk medium of continuous thin film is provided, in which a deposition source is deposited on an opposed Al-alloy substrate by means of a reactive vacuum deposition technique and the deposited film is thermally treated so as to be the magnetic disk medium. As the deposition source, a ferroalloy containing about 1 to 10 at.% Ti and about 0.5 to 5 at.% Co is employed.

Abstract: The present invention relates to novel chromone derivatives, which are shown by the following general formula ##STR1## wherein n is 0 or 1, m is 0, 1 or 2 when each of R's represents halogen, nitro, straight or branched alkyl having 1 to 6 carbon atoms, cyclic alkyl having 3 to 6 carbon atoms or butadienylene (--CH.dbd.CH--CH.dbd.CH--) which forms a benzene ring with any two adjacent carbon atoms at positions 5, 6, 7 and 8, --COOR', wherein R' is hydrogen, lower alkyl, aralkyl, carboxamide which may be unsubstituted or substituted by at least one lower alkyl or aralkyl, or amino group which may be unsubstituted or substituted by R'CO--, wherein R' is a straight or branched chain alkyl or aryl, or lower alkyl, aralkyl or aryl, m is 0 or 1 when each of R's represents hydroxy, lower alkoxy or R'COO--, wherein R' is a straight or branched chain alkyl or aryl. The novel derivatives are useful as intermediates for chromones having effective anti-allergic action.

Abstract: The present invention relates to novel 1-azaxanthone-3-carboxylic acid and its derivatives usable for effective medicines for the treatment of allergic diseases, which are shown by the following formula (I) ##STR1## wherein R.sub.1 is hydrogen, alkyl, phenyl, carboxyl, hydroxyl, alkoxy or amino group which may be unsubstituted or substituted by one alkyl, m is 0, 1 or 2 and R.sub.2 is alkyl, alkoxy, halogen, nitro, hydroxy, carboxyl, butadienylene (--CH.dbd.CH--CH.dbd.CH--) which forms a benzene ring with any adjacent carbon atoms or amino group which may be unsubstituted or substituted by at least one alkyl, and their physiologically acceptable salts.