157 results about "Hydrophilic matrix" patented technology

One aspect of the invention relates to a pharmaceutical dosage unit for sublingual, buccal, pulmonary or oral administration, said dosage unit having a weight of 20-500 mg and comprising 1-80 Wt. % of a microgranulate that is distributed throughout a solid hydrophilic matrix; said microgranulate being characterised in that it: has a volume weighted average diameter of 5-100 m; contains at least 0.01 wt. %, preferably at least 0.1 wt. % of one or more water-insoluble pharmaceutically active substances; contains at least 10 wt. %, preferably at least 20 wt. % of an emulsifier component; and is capable of forming a micro-emulsion upon contact with saliva or water. The dosage units of the present invention achieve the inherent benefits of oral delivery whilst at the same time realising a high transmucosal absorption rate of the cannabinoids contained therein. Other aspects of the present invention relate to the use of the aforementioned dosage units in the therapeutic or prophylactic treatment and to a process for the manufacture of said dosage units.

The present invention provides a lateral flow format and materials and methods for using the format in a variety of applications. More particularly, the present invention provides single-layer lateral flow formats, materials and methods for detecting the presence of an analyte using a test strip comprising a dry porous medium comprising a single hydrophilic matrix. Devices are also provided as well as methods of making and using the format. The format is particularly useful for diagnosis of physiological and genetic conditions. In addition, the present invention provides methods and materials for concentrating a reagent in a porous medium.

Controlled release and taste masking compositions containing one or more active principles inglobated in a three-component matrix structure, i.e. a structure formed by successive amphiphilic, lipophilic or inert matrices and finally inglobated or dispersed in hydrophilic matrices. The use of a plurality of systems for the control of the dissolution of the active ingredient modulates the dissolution rate of the active ingredient in aqueous and/or biological fluids, thereby controlling the release kinetics in the gastrointestinal tract.

Controlled release and taste masking compositions containing one or more active principles inglobated in a three-component matrix structure, i.e. a structure formed by successive amphiphilic, lipophilic or inert matrices and finally inglobated or dispersed in hydrophilic matrices. The use of a plurality of systems for the control of the dissolution of the active ingredient modulates the dissolution rate of the active ingredient in aqueous and/or biological fluids, thereby controlling the release kinetics in the gastrointestinal tract.

The present disclosure generally relates to a personal care device comprising an immiscible conditioning composition formed by combining a hydrophilic matrix, such as a polymeric material, and a hydrophobic conditioning agent. More particularly, the present disclosure relates to a personal care device comprising a hydrophilic matrix, such as a polymeric material, and a hydrophobic conditioning agent dispersed therein, such as a silicone or a siloxane-based agent suitable for transferring from the device surface, and more particularly the matrix surface, to hair or skin surfaces in contact therewith.

The present invention was completed based on these discoveries and relates to in a hydrogel-forming compression-coated solid pharmaceutical preparation comprising a core tablet containing drug and outer layer made from hydrogel-forming polymer substance and hydrophilic base, the improvement, a timed-release compression-coated solid composition for oral administration, said composition comprising (1) drug and freely erodible filler are mixed with the core tablet, (2) the percentage erosion of the core tablet is approximately 40 to approximately 90%, and (3) the outer layer essentially does not contain the same drug as the above-mentioned drug. By releasing a drug after a specific lag time, it becomes possible to effectively deliver a drug to a specific site in the digestive tract. It is therefore useful as presented as a timed-release solid composition for oral administration of a drug that is to be effectively delivered in high concentrations to the afflicted site in the lower digestive tract, a drug that is to be effectively absorbed in the lower digestive tract, a drug that is effective for chronopharmacotherapy, etc.

The invention relates to an antibacterial polypropylene block copolymer and a preparation method thereof and a modified material containing the antibacterial polypropylene block copolymer. The general formula of the antibacterial polypropylene block copolymer is S-I-S, wherein I is a hydrophilic matrix polypropylene chain segment, and S is an antibacterial functional chain segment; the antibacterial functional chain segment is quaternary ammonium polymethacrylate, chitosan polyacrylate, polypara-vinylbenzyltributyl phosphorus chloride or polyvinylpyridine quaternary ammonium; and the molecular weights of the hydrophilic matrix polypropylene chain segment and the antibacterial functional chain segment are 1,000-20,000g/mol respectively. According to the antibacterial polypropylene block copolymer and the preparation method thereof provided by the invention, the hydrophilic matrix polypropylene chain segment is combined with the specific antibacterial functional chain segment to form the antibacterial polypropylene block copolymer, thus the problems of the prior art are solved; the process is simple, and the cost is low; and in the obtained modified material, the adhesion of the copolymer is greatly improved, and the copolymer does not drop easily and has good durability, thus the antibacterial property is long-lasting while the mechanical properties of the matrix material are not influenced.

A sustained release, mucoadhesive vaginal pharmaceutical composition is provided comprising (a) an effective amount of at least one active pharmaceutical ingredient and (b) a hydrophilic matrix having mucoadhesive properties and capable of providing a sustained release of the active pharmaceutical ingredient, the hydrophilic matrix comprising a hydrophilic polymer having a weight average molecular weight of at least about 100,000. Also provided are solid oral dosage forms comprising the sustained release, mucoadhesive vaginal pharmaceutical compositions.

The invention is directed to analytical devices and micro-arrays with integral fluidic inputs and outputs. The devices are constructed from planar solid-phase hydrophilic matrix circuits containing dry chemical reagents overlaying integral electro-kinetic pumping electrodes. The hydrophilic matrix circuits are enclosed within a gas permeable electrical insulator. The devices are for use in micro-scale bio-analysis, mixture separation and reaction.

The invention relates to a nifedipine sustained release tablet and a preparation method thereof. The nifedipine sustained release tablet is characterized by comprising a tablet core and film coating liquid, wherein the tablet core comprises the following components in percentage by mass: 10 to 12 percent of nifedipine (Nif), 6.5 to 7.5 percent of hydroxypropyl methyl cellulose K4M, 45 to 47 percent of lactose, 34 to 35 percent of microcrystalline cellulose, 0.48 to 0.55 percent of lauryl sodium sulfate, a proper amount of 95 percent ethanol and a proper amount of magnesium stearate; and the film coating liquid comprises the following component in percentage by mass: 5.85 to 6.55 percent of Opadry II and 92.86 to 93.82 percent of distilled water. The preparation method comprises the following step of: mixing the nifedipine and polymer by utilizing the imported polymer and dispersion technology to form a hydrophilic matrix tablet so as to fulfill the aim of sustained release. Compared with an ordinary tablet, the sustained release tablet can continuously act for 12 hours relaxatively, is released in a sustained way and has less and slighter adverse reaction.

An electronic device adapted for performing molecular biological processes. The device includes a flexible polymeric substrate having a first surface and a second surface. A plurality of microlocations interrupt the first surface, and each of said microlocations include an electrode disposed on the second surface of the flexible substrate. A hydrophilic matrix is positioned on the first surface of the flexible substrate and is capable of electrical contact with the electrode.

Disclosed is a hydrophilic dressing (200) having appropriate mechanical strength, comprising a composite material (100, 220) and a film (210). The composite material (100, 220) comprises a hydrophilic substrate material (110) and a compound (120) that promotes wound healing, wherein the hydrophilic substrate material (110) is a reaction product of a hydrophilic polymer, wherein the hydrophilic polymer comprises a hydrophilic monomer, a cross-linking agent and an inorganic silicon-oxygen compound, wherein the compound (120) that promotes wound healing is distributed in the hydrophilic substrate material (110).

Provided are affinity support materials having intermediate binding affinity for biological samples. Among the materials provided by the present invention are hydrophilic solid supports composed of hydrophilic ligands coupled to hydrophilic matrixes which are compatible with biological samples, for example, a cell line, a biological fluid such as blood, or a tissue cell lysate. The ligands may include affinity property groups and hydrophilic groups pendent from a backbone, and be configured to at least partially resolve components of a biological sample. Affinity supports in accordance with the present invention may be used in a variety of techniques and apparatuses to achieve improved separations of complex biological samples and thereby enhance the results of biological sample component fractionations, enrichments, purifications, expression product determinations and comparisons, and other biological sample processing techniques. In addition, the affinity supports may be included in kits useful in processing biological samples.

The invention relates to a lappaconitine gel patch and a preparation method thereof. The gel patch sequentially comprises a non-woven fabric layer, a patch matrix layer and a protective layer, wherein the patch matrix layer consists of the following components in parts by weight: 1.0-2.5 parts of lappaconitine, 5-12 parts of a cross-linked matrix, 0.2-0.4 parts of a cross-linking agent, 0.2-0.4 parts of a cross-linking regulator, 0.5-3 parts of a hydrophilic matrix, 0.5-3 parts of a filler, 20-35 parts of moisturizer, 0.5-3 parts of a transdermal promoter, 8-25 parts of a solubilizer and 25-55 parts of water. The gel patch prepared by the invention is high in drug loading amount, long in moisture content, strong in moisture retention, high in transdermal rate, long-acting, good in sustained-release effect and low in toxic and side effects, and the gel patch can dredge meridians and viscera, so as to take effects on a whole body; the gel patch is free from allergy or irritation and convenient to use; the gel patch cannot contaminate clothes and is unnecessary to pull hairs; and the gel patch can be repeatedly used and is low in production cost.

The invention particularly relates to a pramipexole dihydrochloride transdermal patch and a preparation method thereof, and belongs to the field of medicament preparation. A hydrophilic matrix mixed penetration enhancer is utilized, so that the condition that a medicament quickly releases within a long period of time at a constant speed, and achieves a relatively good permeation rate is guaranteed by adopting a multi-layer patch technology. The invention also discloses a preparation method of the pramipexole dihydrochloride transdermal patch, and the transparent patch which is good in uniformity is prepared.

A self-gelling tunable drug delivery system is disclosed. The self-gelling tunable drug delivery system is comprised of a hydrophilic matrix and a hydrophobic matrix.

The invention discloses transdermal patch containing vauqueline and a preparation method and an application thereof. The transdermal patch consists of a back sheet, a protective layer and a medicine-containing matrix layer, wherein the medicine-containing matrix layer consists of vauqueline, hydrophilie matrix and penetrating agent, wherein the penetrating agent is selected from one or more of azone, oleic acid, propanediol and menthol. The vauqueline patch has scientific and reasonable proportion. Particularly the hydrophilie matrix is adopted, so the loaded dosage can be increased, and the vauqueline is effectively promoted to be released through the adhesive layer so as to improve the bioavailability. Moreover, the vauqueline patch is proved in the Pharmacodynamics experiment that stable blood medicine concentration can be maintained after the percutaneous absorption of the vauqueline patch, good pain-killing and anti-inflammatory effect can be played when the toxicity thereof is prevented, the preparation process has strong maneuverability, and the industrialized production can be realized.

The present invention relates to modified-release oral pharmaceutical compositions containing one or more active principles solubilised, suspended or embedded in a suitably formulated amphiphilicmatrix which, loaded in hydrophilic matrices, provides different release profiles.

The invention provides hydrophilic polymer functional magnetic nanospheres as well as a preparation method and an application thereof to solve the problems that few magnetic hydrophilic matrix types exist, the preparation condition is harsh and operation is tedious. According to the technical scheme, the magnetic nanospheres take Fe3O4 as the core, after surface double bond functionalization, a hydrophilic polymer is formed on the surface of Fe3O4 through a precipitation polymerization reaction. The preparation method of the magnetic nanospheres comprises steps as follows: (1) preparation of Fe3O4 magnetic nanospheres with a solvothermal method; (2) surface double bond modification of the magnetic nanospheres; (3) preparation of hydrophilic functional magnetic nanospheres: the magnetic nanospheres are used as an adsorbent used for separation and enrichment of glycopeptide or glycoprotein. The magnetic nanospheres are prepared from simple components, are easy to produce, adopt mild reaction conditions, can be used for efficient and high-selectivity separation and enrichment, can be applied to enrichment of glycopeptide or glycoprotein in complex biological samples and have remarkable economic and social benefit.