ABSTRACT A cosmetic composition for skin containing a solvent A, a solvent B, and a polymer C, where a boiling point of the solvent A is lower than 99? C., and a distance Ra of the Hansen solubility parameter of the solvent A to water is 36 or less; a boiling point of the solvent B is 150? C. or higher, and a distance Ra of the Hansen solubility parameter of the solvent B to water is 40 or more; and the solvent B is compatible with the solvent A, and the polymer C is soluble in the solvent A but insoluble in the solvent B. A cosmetic coating film for skin includes the cosmetic composition.

A polymer comprising a structural unit of formula (I). wherein each X is independently a C.sub.1-10 hydrocarbylene group optionally comprising 1 to 6 heteroatoms: Y is a C.sub.2-20 hydrocarbylene group: Z is a C.sub.1-20 hydrocarbylene group optionally comprising 1 to 6 heteroatoms or a linking group comprising one or more alkylene glycol or ethylene diamine groups: n is 12 to 100; and m is 2 to 1000.

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The present invention relates to an artificial cell membrane system comprising at least one membrane protein carrier associated with at least one membrane protein, wherein the at least one membrane protein carrier comprises or consists of a polymeric vesicle or a polymeric planar structure, and a solid support freely suspended in a fluid medium, wherein the at least one membrane protein carrier is attached to a surface of the solid support. A method of forming the artificial cell membrane system, and use of the artificial cell membrane system as a reagent are also provided.

There is provided an organopolysiloxane which is excellent in extensibility as well as solubility and dispersibility in water and lower alcohols. There is provided an organopolysiloxane with a poly(N-acylalkyleneimine) segment having a repeating unit represented by the following general formula (1): ##STR00001##
wherein R.sup.1 represents a hydrogen atom or an alkyl group, an aralkyl group, or an aryl group each having 1 to 22 carbon atoms, and n is 2 or 3, wherein the segment is bound to each of at least two silicon atoms of an organopolysiloxane segment as a main chain via an alkylene group containing a hetero atom, and wherein the number-average molecular weight of the segment is 800 to 1600, the mass ratio of the organopolysiloxane segment as a main chain and the poly(N-acylalkyleneimine) segment is 65/35 to 82/18, and the weight-average molecular weight of the organopolysiloxane segment as a main chain is 10,000 to 100,000.

There is provided an organopolysiloxane which is excellent in extensibility as well as solubility and dispersibility in water and lower alcohols. There is provided an organopolysiloxane with a poly(N-acylalkyleneimine) segment having a repeating unit represented by the following general formula (1): ##STR00001##
wherein R.sup.1 represents a hydrogen atom or an alkyl group, an aralkyl group, or an aryl group each having 1 to 22 carbon atoms, and n is 2 or 3, wherein the segment is bound to each of at least two silicon atoms of an organopolysiloxane segment as a main chain via an alkylene group containing a hetero atom, and wherein the number-average molecular weight of the segment is 800 to 1600, the mass ratio of the organopolysiloxane segment as a main chain and the poly(N-acylalkyleneimine) segment is 65/35 to 82/18, and the weight-average molecular weight of the organopolysiloxane segment as a main chain is 10,000 to 100,000.

Described herein are silicon based conjugates capable of delivering one or more payload moieties to a target cell or tissue. Contemplated conjugates may include a silicon-heteroatom core, one or more optional catalytic moieties, a targeting moiety that permits accumulation of the conjugate within a target cell or tissue, one or more payload moieties (e.g., a therapeutic agent or imaging agent), and two or more non-interfering moieties covalently bound to the silicon-heteroatom core.

Described herein are silicon based conjugates capable of delivering one or more payload moieties to a target cell or tissue. Contemplated conjugates may include a silicon-heteroatom core, one or more optional catalytic moieties, a targeting moiety that permits accumulation of the conjugate within a target cell or tissue, one or more payload moieties (e.g., a therapeutic agent or imaging agent), and two or more non-interfering moieties covalently bound to the silicon-heteroatom core.

The present invention relates to a method for producing silazane-siloxa copolymers and the use of such copolymers, particularly in LEDs.

The present invention relates to a method for producing silazane-siloxa copolymers and the use of such copolymers, particularly in LEDs.

Composite structures that include a first layer including a silicone block copolymer; a transition layer, the transition layer having a first surface contiguous with the first layer and a second opposing surface, the transition layer formed from the silicone block copolymer of the first layer; and a glass-like layer contiguous with the second surface of the transition layer, at least a portion of the glass-like layer formed from the transition layer.