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4497 results about "Side chain" patented technology

In organic chemistry and biochemistry, a side chain is a chemical group that is attached to a core part of the molecule called the "main chain" or backbone. The side chain is a hydrocarbon branching element of a molecule that is attached to a larger hydrocarbon backbone. It is one factor in determining a molecule's properties and reactivity. A side chain is also known as a pendant chain, but a pendant group (side group) has a different definition.

Compositions comprising anionic functionalized polyorganosiloxanes for hydrophobically modifying surfaces and enhancing delivery of active agents to surfaces treated therewith

Disclosed are compositions and methods for treating and modifying surfaces and for enhancing delivery of active agents to surfaces treated therewith, wherein the compositions comprise siloxane polymers functionalized with pendant moieties comprising two or more anionic groups, at least one anionic group being a carboxy group. When applied to a suitable surface, the present composition forms a substantially hydrophobic coating of the anionic functionalized siloxane polymer on the treated surface. These polymers effectively deposit on surfaces that have cationic sites, which are capable of forming bonds or linkages with the anionic groups of the polymer. The treated surface becomes hydrophobic due to the deposition of the anionic functionalized siloxane polymer, which then imparts a variety of end use benefits to that surface such as ease of cleaning, soil release, stain removal and prevention, conditioning, etc. The anionic functionalized siloxane polymer further acts as a carrier to deposit active agents onto the surface and to improve retention and efficacy of the active agents on the treated surface. The present compositions are useful in a variety of applications including oral care, hair and skin care, personal care, cosmetics, and fabric and hard surface cleaning and conditioning.

Microspheres capable of binding radioisotopes, optionally comprising metallic microparticles, and methods of use thereof

One aspect of the present invention relates to a microsphere, comprising a hydrophilic polymer comprising a plurality of pendant anionic groups; a transition-metal, lanthanide or group 13-14 metal oxide, polyoxometalate or metal hydroxide or combination thereof; and a first radioisotope that emits a therapeutic β-particle. In certain embodiments, the microsphere further comprsies a second radioisotope that emits a diagnostic γ-ray; wherein the atomic number of the first radioisotope is not the same as the atomic number of the second radioisotope. In certain embodiments, the microsphere is composed of polymer impregnated with zirconia bound to 32p as the source of the therapeutic β-emissions and 67Ga as the source of the diagnostic γ-emissions. Another aspect of the present invention relates to the preparation of a microsphere impregnated with a radioisotope that emits therapeutic β-particles and a radioisotope that emits diagnostic β-emitting radioisotope and a γ-emitting radioistope; wherein the atomic number of the first radioisotope is not the same as the atomic number of the second radioisotope. In certain embodiments, said microspheres are administered to the patient through a catheter. In another embodiment, the microsphere is combined with the radioisotopes at the site of treatment.

Novel dipeptidyl peptidase iv (dp-iv) inhibitors as anti-diabetic agents

The present invention relates to a series of prodrugs of inhibitors of DP-IV with improved properties. The compounds can be used for the treatment of a number of human diseases, including impaired glucose tolerance and type II diabetes. The compounds of the invention are described by general formula (1); wherein R1 is H or CN; R2 is selected from CH2R5, CH2CH2R5 and C(R3)(R4)—X2—(CH2)aR5; R3 and R4 are each independently selected from H and Me; R5 is selected from CON(R6)(R7), N(R8)C(=0)R9, N(R8)C(═S)R9, N(R8)SO2R10 and N(R8)R10; R6 and R7 are each independently R11(CH2)b or together they are —(CH2)2-Z-(CH2)2— or CH2-o-C6H4-Z-CH2—; R8 is H or Me; R9 is selected from R11(CH2)b, R11(CH2)bO and N(R6)(R7); R10 is R11(CH2)b; R11 is selected from H, alkyl, optionally substituted aryl, optionally substituted aroyl, optionally substituted arylsulphonyl and optionally substituted heteroaryl; R12 is selected from H2NCH(R13)CO, H2NCH(R14)CONHCH(R15)CO, C(R16)═C(R17)COR18 and R19OCO; R13, R14 and R15 are selected from the side chains of the proteinaceous amino acids; R16 is selected from H, lower alkyl (C1-C6) and phenyl; R17 is selected from H and lower alkyl (C1-C6); R18 is selected from H, lower alkyl (C1-C6), OH, O-(lower alkyl (C1-C6)) and phenyl; R19 is selected from lower alkyl (C1-C6), optionally substituted phenyl and R20C(=0)OC(R21)(R22); R20, R21 and R22 are each independently selected from H and lower alkyl (C1-C6); Z is selected from a covalent bond, —(CH2)c—, —O—, —SOd— and —N(R10)—; X1 is S or CH2; X2 is O, S or CH2; a is 1, 2 or 3; b is 0-3; c is 1 or 2; and d is 0, 1 or 2.

Surgical adhesive compostion and process for enhanced tissue closure and healing

A surgical tissue adhesive composition contains at least one 1,1-disubstituted electron-deficient olefin macromer. The adhesive composition of the invention has improved biocompatibility as well as controlled biodegradation characteristics and bioactivity. Adhesive co-monomer compositions contain at least one macromer with a pendant oligomer, polymer, or peptide chain as an acrylic ester of the reactive olefin. The polymers formed therefrom have a grafted brush-like nature. The composition is particularly useful for creating an adhesive bond at the junction of living tissue in surgical applications. The adhesive composition may further comprise co-monomer, co-macromer, cross-linker, or inter-penetrating polymer compounds containing peptide sequences that are bioactive or enzyme responsive. The peptide sequences are selected to promote tissue infiltration and healing in a particular biological tissue. The sequences may contain specific cell-adhesion, cell-signaling, and enzyme-cleavable domains. Furthermore, a degradable filler material may be included in the composition to create a reinforced composite. The filler preferably has a higher degradation rate than the polymer matrix, generating porosity upon degradation. The adhesive may further contain entrapped or incorporated drugs or biologics, including antibiotics or growth factors. The adhesive can be used to bind together the edges of living tissues during surgical procedures. The cured composition provides interfacial bonding and mechanical fixation while promoting tissue infiltration and replacement of the adhesive polymer.
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