摘要:
The present invention provides for lipophilic, labile alkanoyloxymethyl esters of nitroxides that cross the blood-brain barrier, and after hydrolysis with esterases therein, the corresponding anionic nitroxides are intracellularly entrapped at levels sufficient to permit O 2 measurements by electron paramagnetic resonance spectroscopy.
摘要:
The present invention provides a compound and a method of making a compound according to the following formula: where R 1 is an alkyl group having 1 to 12 carbons; R 2 is a urea group; R 3 is an active group, such as fluorescein, a toxin, radiolabel or drug; and R 4 , R 5 and R 6 are each independently a halide group.
摘要翻译:本发明提供一种化合物及其制备方法,其中R1为具有1至12个碳原子的烷基; R2是尿素基团; R3是活性基团,例如荧光素,毒素,放射性标记物或药物; R 4,R 5和R 6各自独立地为卤素基团。
摘要:
A mixing apparatus is provided comprising: first driving means for driving a plurality of reagent samples from a plurality of respective source wells into a first fluid flow stream; second driving means for introducing a separation gas between each of the plurality of reagent sample in the first fluid flow stream; means for driving a second fluid flow stream comprising a plurality of particles; a junction device comprising: a first inlet port for receiving the first fluid flow stream; a second inlet port for receiving the second fluid flow stream; a reaction zone for forcing mixing between the first fluid flow stream and the second fluid flow stream to thereby form a reaction product stream; and an outlet port for allowing the reaction product stream to exit the junction device; a reaction zone where the plurality of reagent samples and the plurality of particles mix to form a plurality of reaction products, the reaction zone communicating with the outlet port; reaction product driving means for driving the reaction product stream through the reaction zone; and means for selectively analyzing the reaction product stream for the reaction products. A method for mixing materials is also provided comprising: driving a first fluid flow stream comprising a plurality of reagent samples separated by gas bubbles through a second inlet port of a junction device; driving a second fluid flow stream comprising particles through a first inlet port of the junction device; mixing the first fluid stream and the second fluid stream in a reaction zone in the junction device to form a reaction product stream; and driving the reaction product stream through an outlet port of the junction device.
摘要:
A laser gyroscope (30) comprising two ninety degree turning prisms (20, 22) optically connected. A non-reciprocal gain layer structure (24) is grown on the hypotenuse face of one prism (22).
摘要:
Filtered regenerative feedback is used to modulate a laser or other source of electromagnetic radiation to generate optical pulses whose amplitudes and repetition rates are continuously tunable. The technique involves converting, by means of a photodetector (9), a portion of the radiation produced by a modulatable electromagnetic radiation source (1, 7) into a control signal, filtering the control signal through a bandpass filter (3, 10), and modulating the modulatable radiation source with the filtered control signal to produce pulses. This technique is in principle applicable to any source of electromagnetic radiation and is especially effective for semiconductor diode lasers.
摘要:
Biomodulators, optionally linked to imaging-active moieties, can be administered to a host to enhance images thereof, e.g., NMR-, X-ray- or radio-images, preferably by increasing aberrant tissue signal intensity. Biomodulators can also condition tissue to enhance uptake of otherwise non-specific imaging agents. When linked to drugs, biomodulators can target the same to particular sites in the body. Biomodulators can be also administered together with an agent such as a drug or an imaging agent (specific or non-specific) structurally modified to take advantage of perturbations of cell oligosaccharide displays caused by biomodulators, to enhance images of a host, e.g., NMR-, X-ray- or radio-images, preferably by increasing aberrant tissue signal intensity. Biomodulators condition tissue to enhance or otherwise modify up-take of the drug or structurally modified agent.
摘要:
Biomodulators, which regulate cellular differentiation and proliferation, as well as methods of use thereof, e.g., for treating various conditions, e.g., cancer, senescence, immunological disorders and vascular disease; for stimulating normal tissue architecture after injury; for vaccination; for stimulating the production of biologically important molecules by cells or organs in culture; for maintaining organs or tissues outside of a body after removal from the body and prior to transplantation; and for producing vascular grafts for transplantation; are provided.
摘要:
A forceps for holding and everting vessels in an anastomosis procedure includes three cooperating jaws (32, 34, 36) mounted at the ends of respective relatively movable legs (10, 12, 14). The legs (10, 12, 14) can be independently manipulated in order to secure and evert first one vessel, then another in apposition to the first, so that clips or sutures can be applied to complete the anastomosis.
摘要:
An improved membrane electrode (11) for measuring the concentration of a non-ionic species in an essentially aqueous medium comprising: an electrically conductive substrate (17); a first coating (13) surrounding said substrate (17) composed of a mixture of polymeric material, an anion exchange material, and a water-insoluble alkaline earth metal salt of said non-ionic species, and a hydrogel coating (15) of material surrounding said first coating (13) having a positive charge of sufficient potential to prevent leaching of the substantial amounts of the alkaline earth metal component of said salt.
摘要:
The invention concerns a wavelength tunable semiconductor laser comprising a laser gain section (510) optically coupled to an underlying optical waveguide (520). According to an embodiment of the invention, a first and a second passive microring resonators (530, 560) having a whistle geometry, are arranged on both sides of the laser gain section and evanescently coupled with the optical waveguide (520). Highly reflective broadband mirrors (541, 571) are provided at the free ends of optical waveguide branches (240, 270) tangentially connected to the microring resonators. The first and second passive microrings resonators provide an optical feedback to the laser gain section and allow to select the desired wavelength. The laser structure can be implemented according to a III-V/Si technology.