Abstract:
Medical devices are typically sterilized in processes used to manufacture such products and their sterilization by exposure to radiation is a common practice. Radiation has a number of advantages over other sterilization processes including a high penetrating ability, relatively low chemical reactivity, and instantaneous effects without the need to control temperature, pressure, vacuum, or humidity. Unfortunately, radiation sterilization can compromise the function of certain components of medical devices. For example, radiation sterilization can lead to loss of protein activity and/or lead to bleaching of various dye compounds. Embodiments of the invention provide methods and materials that can be used to protect medical devices from unwanted effects of radiation sterilization.
Abstract:
Sensors and methods for determination of analytes are provided. Analytes including explosives (e.g., RDX or PETN) may be determined by monitoring, for example, a change in an optical signal of a material upon exposure to the analyte. In some embodiments, the analyte and the material may interact via a chemical reaction to form a new emissive species. Embodiments described herein may provide inexpensive sensors with high selectivity and sensitivity.
Abstract:
A surface grafted conjugated polyelectrolyte (CPE) is formed by coupling a CPE by a coupling moiety to the surface of a substrate. The substrate can be of any shape and size, and for many uses of the surface grafted CPE, it is advantageous that the substrate is a nanoparticle or microparticle. Surface grafted CPEs are presented that use silica particles as the substrate, where a modified silane coupling agent connects the surface to the CPE by a series of covalent bonds. Two methods of preparing the surface grafted CPEs are presented. One method involve the inclusion of the surface is modified by the coupling agent and condensed with monomers that form the CPE in a grafted state to the substrate. A second method involves the formation of a CPE with terminal groups that are complimentary to functionality that has been placed on the surface of the substrate by reaction with a coupling agent. The surface grafted CPEs are also described for use as biosensors and biocides.
Abstract:
The invention relates to a method for determining the amount of conjugated taxane, in particular paclitaxel, in a PGA-taxane conjugate said method comprising: a) reacting the PGA-taxane conjugate with a compound formula (I): R 1 R 2 N-NH 2 (I), wherein R 1 and R 2 are as defined in the description; to give a unbound taxane and a PGA hydrazide and b) determining the amount of unbound taxane.
Abstract:
Novel photochromic and electrochromic hexadiene compounds are described. The compounds are reversibly convertible between ring-open and ring-closed isomeric forms as indicated in structures I(o) and I(c) below. (See formula in original abstract of application) The conversion between the different isomeric forms may be induced by light or electricity. In one embodiment the compounds may include a charge transfer moiety including electron donor and acceptor groups. The electron donor and acceptor are linearly conjugated in the ring-open form to enable electron transfer but are electrically insulated in the ring-closed form. Methods for synthesizing the compounds from photochemically and/or electrically inert precursors are also described. For example, the photoresponsive compounds may be synthesized by reacting diene precursors with dienophiles in a condensation reaction. The compounds may be utilized in reactivity-gated photochromic or electrochromic applications. In one embodiment of the invention, compounds of the invention may be used in a method to selectively release a releasable agent, such as a small molecule. According to this method, a photochemically inert precursor compound is reacted with the releasable agent to form a carrier compound comprising a switching moiety, the switching moiety being reversibly convertible between a thermally unstable form and a thermally stable form. The switching moiety may be selectively converted between the first and second forms to cause controlled release of the releasable agent from the carrier compound.
Abstract:
Described herein are methods for analyzing polymer molecules. These methods are employed for the high throughput readout of DNA and RNA molecules with single molecule sensitivity. The method of the present invention comprises (1) the electrically controlled unzipping of DNA (or RNA) double strands, and (2) the readout of the molecule's identity (or code) using one or more molecule signal detection.
Abstract:
Sandwich assay kits for detecting shigatoxins which comprise a combination of a monoclonal antibody reacting specifically with shigatoxin CTX3C produced by a hybridoma 3D11 (ACCESSION NUMBER FERM BP-8293) with another monoclonal antibody reacting specifically with shigatoxin CTX3C produced by a hybridoma 10C9 (ACCESSION NUMBER FERM BP-8292), in particular, a combination wherein one of these monoclonal antibody is bound to a labeling compound to give a labeled monoclonal antibody and then combined with the other monoclonal antibody which is unlabeled.
Abstract translation:用于检测志贺毒素的三明治测定试剂盒,其包含由杂交瘤3D11(ACCESSION NUMBER FERM BP-8293)与由杂交瘤10C9(ACCESSION NUMBER FERM)产生的与毒蕈碱CTX3C特异性反应的另一种单克隆抗体特异性地与由俄罗斯的杂交瘤3D11(ACCESSION NUMBER FERM BP-8293)产生的叶黄素CTX3C特异性反应的单克隆抗体的组合 BP-8292),特别是其中这些单克隆抗体之一与标记化合物结合以得到标记的单克隆抗体,然后与未标记的其他单克隆抗体组合的组合。
Abstract:
A method of automatically controlling the addition rate of Fresh Oxygen Scavenger Product and Ultimate Oxygen Scavenger Product to a Boiler System is described and claimed. The method is based on the inherent fluorometric properties of certain Fresh Oxygen Scavenger Products and certain Ultimate Oxygen Scavengers in their reduced (unreacted) form and also, for the Ultimate Oxygen Scavengers, in their oxidized (reacted) form. It has also been found possible to enhance the fluorescent signal of certain Oxygen Scavengers by adding a borate buffer to the sample stream. By using the method of the instant claimed invention it is now possible to improve the overall control of Boiler Systems using certain Fresh Oxygen Scavenger Products and certain Ultimate Oxygen Scavenger Products.
Abstract:
A system and method for desorption and ionization of analytes in an ablation medium. In one embodiment, the method includes the steps of preparing a sample having analytes in a medium including at least one component, freezing the sample at a sufficiently low temperature so that at least part of the sample has a phase transition, and irradiating the frozen sample with short-pulse radiation to cause medium ablation and desorption and ionization of the analytes. The method further includes the steps of selecting a resonant vibrational mode of at least one component of the medium and selecting an energy source tuned to emit radiation substantially at the wavelength of the selected resonant vibrational mode. The medium is an electrophoresis medium having polyacrylamide. In one embodiment, the energy source is a laser, where the laser can be a free electron laser tunable to generate short-pulse radiation. Alternatively, the laser can be a solid state laser tunable to generate short-pulse radiation. The laser can emit light at various ranges of wavelength.