A process for preparing a porous solid material for use in a chromatography column and which is capable of fixing reversibly biological macromolecules comprises coating a porous inorganic support with a polysaccharide polymer having alpha -glycol groups which undergo oxidative scission, subjecting the polysaccharide polymer to an oxidative scission reaction, reacting the resulting oxidized polysa...

A new class of antitumor glycoside antibiotics of the formula (IA): (IA) wherein R is hydrogen or hydroxy; and X is These compounds are prepared, using novel intermediates, by condensing the appropriate aglycone and branched-chain aminodeoxy sugar to form the alpha -glycosidic linkage.

Derivatives of oleandomycin, its 11-monoalkanoyl, 2-monoalkanoyl and 11,2'-dialkanoyl esters having at the 4''-position an amino group substituted with -C(=O)-C(=O)-R3 or -C(=S)-C(=O)-R3 wherein R3 is alkyl having from one to four carbon atoms, phenyl, substituted phenyl, or a heterocyclyl group, their preparation and use as antibacterial agents is described.

TITLE: Anthracycline derivatives New anthracycline compounds, 2-hydroxy-aclacinomycins M, N, S and T having potent antitumor activity and low toxicity, and the processes for the preparation thereof from 2-hydroxy-aclacinomycin A by reduction or acid hydrolysis are disclosed.

A welded joint for plastic pipe is formed by apparatus including a sleeve (6) which is placed over the place where the pipes are joined and a heating mat (3) which is inserted between the sleeve and the pipes. The heating mat (3) and the sleeve (6) are provided with gear-tooth system (4, 5, 114, 115) which engage each other in the assembled condition of the device. Consequently, the surfaces of th...

PURPOSE:To miniaturize a combustion apparatus and to simplify the structure thereof by a method wherein secondary air is sucked into a secondary combustion section together with a primary combustion gas by a sucking force generating due to the rotation of a rotary impeller arranged within the secondary combustion section so that the primary combustion gas and the secondary air are mixed and burned...

A shaped mass resorbable in the body, comprises collagen and a bioresorbable binding agent for collagen, the binding agent being selected, e.g., from polymers of C2-16 alpha -hydroxyalkanoic acids, polymers of natural amino acids, hydrolyzed collagen or hydrolyzed elastin.

A method of connecting a plastic tube to a plastic hub is disclosed which includes preforming the tube by externally heating it in selected areas to cause outward bulging of the tube in those areas, applying an axial force on the tube to cause the bulges to compress axially while heated and molding the hub with the tube bulges in the mold.

A method of manufacturing heat recoverable tubing by (a) extruding pellets of a heat shrinkable, heat sealable plastic into a sheet; (b) cross-linking the sheet with electron beam or alternative form of radiation; (c) orienting the irradiated sheet by stretching the sheet widthwise; and (d) forming the oriented sheet into a tube about a longitudinal axis. The tube is longitudinally seamed, and is ...

A demetalation and desulfurization catalyst for metal and sulfur containing petroleum oils, e.g., residua containing hydrocarbon components, comprising a hydrogenating component composited on a refractory base, e.g., alumina, having a substantially higher pore volume and more pore volume distributed within the 0-100 ANGSTROM diameter range than such previously known catalysts and method of using ...

PURPOSE:To decrease the rotating pulsation even at a low speed rotation time and to reduce the variation in the rotating speed at the abrupt load varying time of an induction motor by interposing a phase advancing circuit at the output side of a speed regulator. CONSTITUTION:A phase advancing circuit 11 is inserted and connected between a speed regulator 2, an absolute value corresponding circuit ...

PURPOSE:To fully digitize a current loop without increasing the load of a main processor by employing a calculation processor. CONSTITUTION:This circuit has a main processor 30 which calculates an amplitude command on the basis of the difference between a command speed and the actual speed of a motor and outputs the amplitude command and a current command of at least one phase, a calculating proce...

The hose comprises a core (1) made from a resilient material, reinforced by a braiding of steel strands (2) which is itself covered by a covering (3) which is anti-abrasive or resistant to chemical products. The braiding is made from cords (4, 5, 6 and 7), each comprising from three to seven steel strands. The braiding angle ( alpha ) lies between 25 and 55 DEG .

A gripper tractor assembly is provided for selectively grasping, conveying and releasing newspapers and like products in a high speed transit path between processing stations. Its structure comprises two jaws pivotable about a common pivot pin for movement between open and closed jaw positions by means of a cammed lever assembly and equipped with rollers for engaging a transport tract defining its...

A silicone rubber sheet which is both electrically insulating and thermally radiating is prepared by treating a network insulating material, such as glass fabric, with an alkoxysilane and then coating the resulting network insulating material with a fluid silicone rubber composition of an aliphatically unsaturated polyorganosiloxane, a polyorganohydrogensiloxane, alumina powder, and a platinum-gro...

An absorbent article, such as a diaper, a sanitary towel or bandage, having an absorbent core, a liquid-permeable topsheet intended to be in contact with the wearer when the article is worn, and a liquid-impermeable layer arranged on the opposite side of the absorbent core. The liquid-permeable topsheet comprises a perforated but otherwise liquid-impermeable layer, the perforations comprising stra...

The invention relates to an absorbent article, such as a sanitary towel, diaper or bandage, having an upper layer or topsheet made of a liquid-impermeable material, the topsheet being provided with openings and being intended to lie against the body of the wearer. The invention is mainly characterized in that the openings are located in depressions arranged in the topsheet and in such wall portion...

Disposable diapers provided with breathable leg cuffs. Disposable diapers comprise a topsheet, an absorbent element, and a backsheet. The leg cuff of a disposable diaper is that part of the diaper which fits about the wearer's leg. Extensions of the backsheet can be used to form cuffs which are frequently elasticized. In the present invention the cuffs are formed of a material which allows passage...