Abstract:
In processes for the hydrolysis of a methyl acetate with at least one of water and methanol in the presence of at least one Brønsted acid catalyst to produce acetic acid the performance of the catalyst is improved by using a methyl acetate feed in which the total amount of acetaldehyde and 1,1 dimethoxyethane impurities is maintained at 100 ppm wt or less calculated as mass equivalents of acetaldehyde.
Abstract:
Using a novel water-soluble, active ester amide-containing functionalized controlled radical polymerization initiator, stimuli responsive polymers have been grown from the surface of a protein, exemplified by chymotrypsin or any protein having surface amino acids that will covalently bind to the active ester amide-containing functionalized initiator. It is shown that changes in temperature or pH can change the conformation of the polymer surrounding the enzyme, which in turn enabled the rational tailoring of enzyme activity and stability. This method has afforded an increase in the activity and stability of the enzyme by an order of magnitude at pH's where the enzyme is usually inactive or unstable. Multimodal temperature responsive protein-block copolymer conjugates are described.
Abstract:
Provided are certain chemical entities, and methods of use to modulate skeletal myosin, skeletal actin, skeletal tropomyosin, skeletal troponin C, skeletal troponin I, skeletal troponin T, and skeletal muscle, including fragments and isoforms thereof, as well as the skeletal sarcomere, and methods of use in the treatment of obesity, sarcopenia, wasting syndrome, frailty, cachexia, muscle spasm, post-surgical and post-traumatic muscle weakness, neuromuscular disease, and other indications.
Abstract:
The present invention generally provides for the dispersion of self-assembled diacetylene nanotubes on a surface, polymerization by UV exposure, and incorporation of the resulting array of nanotubes into an elastic matrix. The composite material thus formed exhibits thermochromic and mechanochromic properties, and is useful in the manufacture of thermosensitive and mechano-sensitive sensors and transducers.
Abstract:
A process for culturing an immature ovarian follicle in vitro is disclosed. The process includes providing a culture having one or more immature ovarian follicles and providing a sufficient amount of oxygen to the ovarian culture on an intermittent basis, stepwise basis, or continuously, or combinations thereof, for a sufficient amount of time over the duration of the culture period to effect the maturation of the immature ovarian follicle. Over the course of the culture period, the oxygen concentration is raised until, at the end of the culture period, the oxygen concentration is in the range preferably between about 3% by volume (22.8 mmHg) and about 20% by volume (152 mmHg).
Abstract:
The present invention relates to biocidal articles. In an embodiment the biocidal article comprises a plurality of polymers having biocidally active groups. The polymers are attached to a surface and may have a polydispersity less than 3. The biocidally active groups may comprise at least one of a quaternary ammonium salt, a quaternary phosphonium salt or a chloroamine. The attached polymers may be any microstructure, topology or composition, such as, a homopolymer, block copolymer, multiblock copolymer, a random copolymer, graft polymer, a branched or a hyperbranched polymer, and a gradient copolymer. The present invention also comprises a process for the preparation of a biocidal article. Embodiments of the process comprise polymerizing radically polymerizable monomers from an initiator attached to a surface, wherein at least a portion of the monomers comprise a group capable of being converted to a biocidally active group, and converting the group to the biocidally active group.
Abstract:
The invention concerns the synthesis of nanotubes and nanocarpets composed of single chain achiral diacetylenes under conditions where individual molecules form supra molecular associations. Self-assembly is a coordinated association of individual molecules into a defined (usually non-covalent) structure without the intervention of a central controller. Self assembly presumes the ability of a molecule, or group of molecules, to assume a stable or quasi stable structure based solely on the structure of the molecules themselves. The driving force in self-assembling systems is that the supramolecular structure achieves a lower energy state than the individual components alone.
Abstract:
The invention provides methods for preparing a stable, multiple-use three enzyme biosensor for the amperometric determination of creatinine in biological liquids that has a useful lifetime that extends significantly beyond that of presently available amperometric biosensors. The biosensor prepared by the methods of the invention encompasses a plurality of immobilized enzymes that are applied to the biosensor as an enzyme-polymer composition. The enzymes, which can include creatinine amidohydrolase, creatine amidinohydrolase and sarcosine oxidase, are immobilized into the enzyme-polymer composition simultaneously as well as applied to the biosensor simultaneously. Prior to being immobilized, the enzymes can be chemically modified by attaching one or more polyethylene glycol (PEG) chains per enzyme monomer. The polymer component can be provided by a polyurethane membrane. The invention also provides a method of preparing a biosensor that limits the diffusion of silver ions emanating the reference electrode, thereby preventing, contact between the silver ions and the enzymes. Related methods of preparing an enzyme-polymer composition for incorporation into a multiple use three enzyme biosensor for the amperometric determination of creatinine in biological liquids also are provided. The invention also provides multiple-use biosensors and enzyme-polymer compositions prepared by the methods disclosed.
Abstract:
An articulated boom arm for a rock boring machine, comprising a first kinked member having a drill guide at one end and a base pivot at the other end, and a pair of pivoted links. One of said links having a first end pivoted at said base pivot, the other of the links having a drill pivotally mounted at a first end thereof. The second ends of the first and second links being pivoted to each other whereby said drill is reciprocally linearly movable along said first member with a drill bit aligned with said drill guide and at one extremity of the reciprocal movement both said pair of links are substantially longitudinally aligned and extend towards said drill guide, and at the other extremity of the reciprocal movement both said pair of links are substantially longitudinally aligned and extend away from said drill guide.
Abstract:
The use of an effective amount of a composition comprising an N.S.A.I.D. and a form of hyaluronic acid selected from hyaluronic acid, pharmaceutically acceptable salts thereof, fragments thereof and/or subunits thereof for mucous membrane trauma, disease, and/or pain relief.