Abstract: The present disclosure provides a novel glass composition that has a low permittivity and is suitable for mass production. A glass composition provided satisfies, in wt %, for example, 40?SiO2?60, 25?B2O3?45, 0<Al2O3?18, 0<R2O?5, and 0?RO?12, and satisfies at least one of: i) SiO2+B2O3?80 and SiO2+B2O3+Al2O3?99.9; and ii) SiO2+B2O3?78, SiO2+B2O3+Al2O3?99.9, and 0<RO<10. Another glass composition provided includes SiO2, B2O3, Al2O3, R2O, and 3<RO<8 at the same contents as the above, and satisfies SiO2+B2O3?75 and SiO2+B2O3+Al2O3<97, where R2O=Li2O+Na2O+K2O and RO=MgO+CaO+SrO.

Abstract: The present disclosure provides a novel glass composition that has a low permittivity and is suitable for mass production. A glass composition provided satisfies, in wt %, for example, 40?SiO2?60, 25?B2O3?45, 0<Al2O3?18, 0<R2O?5, and 0?RO?12, and satisfies at least one of: i) SiO2+B2O3?80 and SiO2+B2O3+Al2O3?99.9; and ii) SiO2+B2O3?78, SiO2+B2O3+Al2O3?99.9, and 0<RO<10. Another glass composition provided includes SiO2, B2O3, Al2O3, R2O, and 3<RO<8 at the same contents as the above, and satisfies SiO2+B2O3?75 and SiO2+B2O3+Al2O3<97, where R2O?Li2O+Na2O+K2O and RO?MgO+CaO+SrO.

Abstract: The present disclosure provides a novel glass composition that has a low permittivity and is suitable for mass production. A glass composition provided satisfies, in wt %, for example, 40?SiO2?60, 25?B2O3?45, 0<Al2O3?18, 0<R2O?5, and 0?RO?12, and satisfies at least one of: i) SiO2+B2O3?80 and SiO2+B2O3+Al2O3?99.9; and ii) SiO2+B2O3?78, SiO2+B2O3+Al2O3?99.9, and 0<RO<10. Another glass composition provided includes SiO2, B2O3, Al2O3, R2O, and 3<RO<8 at the same contents as the above, and satisfies SiO2+B2O3?75 and SiO2+B2O3+Al2O3<97, where R2O=Li2O+Na2O+K2O and RO=MgO+CaO+SrO.

Abstract: The present disclosure provides a novel glass composition that has a low permittivity and is suitable for mass production. A glass composition provided satisfies, in wt %, for example, 40?SiO2?60, 25?B2O3?45, 0<Al2O3?18, 0<R2O?5, and 0?RO?12, and satisfies at least one of: i) SiO2+B2O3?80 and SiO2+B2O3+Al2O3?99.9; and ii) SiO2+B2O3?78, SiO2+B2O3+Al2O3?99.9, and 0<RO<10. Another glass composition provided includes SiO2, B2O3, Al2O3, R2O, and 3<RO<8 at the same contents as the above, and satisfies SiO2+B2O3?75 and SiO2+B2O3+Al2O3<97, where R2O=Li2O+Na2O+K2O and RO=MgO+CaO+SrO.

Abstract: The present disclosure provides a novel glass composition that has a low permittivity and is suitable for mass production. A glass composition provided satisfies, in wt %, for example, 40?SiO2?60, 25?B2O3?45, 0?Al2O3?18, 0<R2O?5, and 0?RO?12, and satisfies at least one of: i) SiO2+B2O3?80 and SiO2+B2O3+Al2O3?99.9; and ii) SiO2+B2O3?78, SiO2+B2O3+Al2O3?99.9, and 0<RO<10. Another glass composition provided includes SiO2, B2O3, Al2O3, R2O, and 3<RO<8 at the same contents as the above, and satisfies SiO2+B2O3?75 and SiO2+B2O3+Al2O3<97, where R2O?Li2O+Na2O+K2O and RO?MgO+CaO+SrO.

Abstract: A filtration device is provided having a large number of filters, each comprising a filter element and a casing. The device includes filter strings constructed so that a plurality of filters are connected in a row by header tubes, at least two rows of filter strings are further connected in parallel by a filtrate recovery collecting tube, and the filtrate recovery collecting tube is placed at a higher position than the filtrate recovery header tubes.

Abstract: A filtration device 50 which has a large number of filters 52 each comprising a filter element and a casing, and has such a structure that filter strings 82 are constructed in such a manner that a plurality of filters 52 are connected in a row by header tubes 58 such as unfiltered liquid feeding header tube 60, filtrate recovery header tube 62 and unfiltered liquid recovery header tube 64, and at least two rows of filter strings 82 are further connected in parallel by a filtrate recovery collecting tube 84, and furthermore the filtrate recovery collecting tube 84 is placed at a higher position than the filtrate recovery header tubes 62.

Abstract: A compound of the formula: ##STR1## in which R.sup.1 is carboxy or protected carboxy,R.sup.2 is 1-hydroxyethyl,R.sup.3 is methyl,R.sup.4 is optionally substituted pyridyl(lower)alkyl, optionally N-substituted 2-oxopiperazin-1-yl-(lower)alkyl, optionally substituted imidazol-1-yl(C.sub.2 -C.sub.3)alkyl, optionally substituted imidazol-5-yl-(lower)alkyl, optionally substituted imidazol-2-yl-(lower)alkyl, optionally substituted pyrazol-4-(or 5-)yl(lower)alkyl, optionally substituted pyrazol-1-ylethyl, optionally substituted triazolyl(lower)alkyl, optionally substituted pyrimidinyl(lower)alkyl, optionally substituted dihydropyrimidinyl(lower)alkyl, or optionally substituted (2,3-dihydroimidazo-[1,2-b]pyrazol-1-yl)ethyl, andR.sup.5 is hydrogen or imino-protective group,and pharmaceutically acceptable salts thereof, which have antimicrobial activity.

Abstract: Novel 3-pyrrolidinylthio-1-azabicyclo[3.2.0]hept-2-ene-2-carboxylic acid compounds and processes for their preparation are disclosed. These novel compounds have antimicrobial activity, and are useful as a medicament in the treatment of infectious diseases in human beings and animals.

Abstract: 1-Azabicyclo[3.2.0]hept-2-ene-2-carboxylic acid compounds of the formula: ##STR1## in which R.sup.1 is carboxy, COO.sup.-- or protected carboxy,R.sup.2 is hydroxy(lower)alkyl or protected hydroxy(lower)alkyl,R.sup.8 is hydrogen or lower alkyl,Z is a group of the formula: ##STR2## wherein R.sup.3 is hydrogen; lower alkyl or lower alkenyl, each of which is optionally substituted by the group consisting of lower alkoxy, carbamoyl, hydroxy, halogen, mono(or di)(lower)alkylcarbamoyl, mono(or di)(lower)alkenylcarbamoyl, mono(or bis)[hydroxy(lower)alkyl]carbamoyl, optionally substituted cyclic-aminocarbonyl, acylamino, ureido, optionally substituted heterocyclic-carbonylamino, carbamoyloxy, mono(or di)(lower)alkylcarbamoyloxy, lower alkylthio, halo(lower)alkylthio, optionally substituted heterocyclicthio, optionally substituted heterocyclic group, optionally substituted aryl, and acyl;R.sup.9 is hydrogen or lower alkyl, andR.sup.

Abstract: The present invention concerns intermediates in the preparation of novel 3-pyrrolidinylthio-1-azabicyclo[3.2.0]hept-2-ene-2-carboxylic acid compounds and pharmaceutically acceptable salts thereof. The novel 3-pyrrolidinylthio-1-azabicyclo[3.2.0]hept-2-ene-2-carboxylic acid compounds and pharmaceutically acceptable salts thereof show antimicrobial activity.

Abstract: The invention relates to compounds of the formula: ##STR1## in which R.sup.4 is an unsaturated, 5 or 6-membered heteromonocyclic group,R.sup.5 is hydrogen, lower alkanimidoyl or imino-protective group,R.sup.7 is ar(lower)alkyl or acyl derived from a carboxylic, carbonic, sulfonic or carbamic acid, andA is lower alkylene,or a salt thereof, useful as intermediates in the preparation of antimicrobial agents.

Abstract: Novel 3-pyrrolidinylthio-1-azabiycyclo[3.2.0]hept-2-ene-2-carboxylic acid compounds and pharmaceutically acceptable salts thereof have antimicrobial activity and are useful as medicaments in the treatment of infectious diseases caused by pathogenic microorganisms.

Abstract: 1-Azabicyclo[3.2.0]hept-2-ene-2-carboxyic acids having antimicrobial activity have been prepared.

Abstract: The invention relates to a compound of antimicrobial activity, of the formula: ##STR1## in which R.sup.1 is carboxy or protected carboxy,R.sup.2 is hydroxy(lower)alkyl or protected hydroxy(lower)alkyl,R.sup.3 is hydrogen or lower alkyl,R.sup.4 is 2-fluoroethyl, 2-chloroethyl, 2-fluoropropyl or 4-fluorobutyl,R.sup.5 is hydrogen, lower alkanimidoyl, unsubstituted lower cycloalkenyl or substituted by a group consisting of oxo and amino, or imino-protective group, andA is lower alkylene, or pharmaceutically acceptable salts thereof.

Abstract: 3-Pyrrolidinylthio-1-azabicyclo[3.2.0]-hept-2-ene carboxylic acids substituted on the pyrrolidine by unsaturated heterocyclyl have been prepared.

Abstract: 3-pyrrolidinylthio-1-azabicyclo[3.2.0]hepten-2-ene-2-carboxylic acid derivatives are prepared.

Abstract: 3-Pyrrolidinythio-1-azabicyclo [3.2.0]hept-2-ene-2-carboxylic acid compounds which have antimicrobial activity have been prepared.

Abstract: 3-Pyrrolidinylthio-1-azabicyclo [320] hept-2-ene-2-carboxylic acid anti-microbiotic compounds are prepared.

Abstract: This invention consists of 3-pyrrolidinylthio-1-azabicyclo[3.2.0]hept-2-ene-2-carboxylic acid compounds and their use as antimicrobial agents in the treatment of infectious diseases.