摘要:
The subject invention provides novel fluorescent core-shell nanoparticles comprising an encapsulated fluorescent core comprising an ionically bound fluorescent dye and a metal oxide shell. In one exemplary embodiment of the invention a core containing indocyanine green (ICG) with a silica shell that displays excellent photostability for generation of a near infrared fluorescence signal. The fluorescent core-shell nanoparticle can be further modified to act as an MRI, x-ray, or PAT contrast agent. The ICG nanoparticles can also be used as photodynamic therapeutic agent. Other embodiments of the invention directed to methods of making the novel core-shell nanoparticles and to the use of the core-shell nanoparticles for in vitro or in vivo imaging.
摘要:
Disclosed herein are surface force microscope probes comprising living cells adhered thereto, as well as methods of making same. Also disclosed is a system for high throughput screening of nanostructures having biological relevance through use of surface force microscope probes comprising living cells. Further disclosed are methods of screening for biointeractive nanostructures.
摘要:
Disclosed herein are surface force microscope probes comprising living cells adhered thereto, as well as methods of making same. Also disclosed is a system for high throughput screening of nanostructures having biological relevance through use of surface force microscope probes comprising living cells. Further disclosed are methods of screening for biointeractive nanostructures.
摘要:
A method for increasing the surface area and roughness of metals, ceramics and composites on a micro-scale, and the surfaces themselves, is disclosed whereby a laser beam having a radiation wavelength of from UV to infrared is pulsed onto the surface of the material. The energy density of the radiation is between 0.01 to 15 J/cm.sup.2 and at least 50 pulses of radiation having duration of from 1 picosecond to 1 millisecond are used on each area. The surface structures formed are semi-periodic and are from 1/4 to several hundred microns in magnitude.
摘要:
A method is disclosed for the separation of coal from run of mine (ROM) coal containing particles of coal and refuse, which comprises conditioning the ROM coal with a coupling agent capable of selectively coating the particulate coal to the substantial exclusion of coating the refuse, which coupling agent is at least one alcohol containing from about 6 to about 22 carbon atoms. Combined with said coupling agent is a fluorescent dye in a quantity to make the coated particles of coal fluoresce upon excitation to a degree sufficient to distinguish the coated coal particles from the substantially non-coated refuse. Exciting (e.g. as with ultraviolet light) the fluorescent dye coupled to the coal particles induces fluorescence and enables separating the fluorescing, coated coal particles from substantially non-fluorescing, non-coated refuse particles.
摘要:
A method for the separation of magnesite from a particulate ore containing particles relatively rich in magnesite and particles relatively rich in dolomite and/or calcite, which comprises conditioning the ore with at least one coupling agent selected from saturated and unsaturated carboxylic acids containing from about 4 to about 22 carbon atoms, to selectively coat the calcite and/or dolomite in the ore to the substantial exclusion of the magnesite, in combination with providing at least one fluorescent dye to said coupling agent; radiating the conditioned ore to excite and induce fluorescence of the fluorescent dye to a degree sufficient to distinguish the coated particles from the non-coated particles and separating the fluorescing, coated particles from the non-fluorescing, non-coated particles.
摘要:
A method for the treatment of cancer involves delivering a surface active agent to an organism, where the surface active agent selectively partitions to and kills cancer cells as opposed to healthy cells. The surface active agent can be an ionic or a non-ionic surfactant with a HLB of less than 29 or a mixture of surface active agents with a HLB of less than 40, where the hydrophobic portion is a lesser fraction of the surface active agent than the hydrophilic portion. A fluorescence method of detecting and locating cancer cells in an organism involves delivering a surface active agent, where the surface active agent includes a fluorescence moiety that upon selective partitioning of the surface active agent to the cancer cells and irradiation by a radiation source to excite the fluorescence moiety, a fluorescence emission is observed permitting the detection and location of the cancerous tissue by local volumes of relatively high intensity emission.
摘要:
Apparatus and method for selective wetting of particles includes sizing of particles to a preselected size for enabling optical discrimination between desired particles having a relatively large surface area receptive to coating by a preselected wetting agent and undesired particles having a relatively small surface area receptive to coating by the preselected wetting agent. The particles are fed into a conditioning zone defined by the spray of wetting agent from at least one spray means, the spray of wetting agent being in sufficient quantity to impact and coat substantially all of the surface areas of the particles receptive to coating by the wetting agent. The means for feeding the particles into the conditioning zone is disposed outside the conditioning zone and preferably feeds the particles in an unsupported state into the conditioning zone.
摘要:
An apparatus and a method for concentrating an ore to recover valuable minerals from the ore is disclosed. The apparatus is based upon flotation separation techniques and comprises a trough into which is fed a slurry of ore particles which have been conditioned with a flotation reagent. The trough has a side extending outwardly forming a downwardly sloping flat table. The slurry of conditioned ore particles flows out of the trough and downwardly along the sloping table. Positioned along the sloping table is a disperser for dispersing larger particles up and into the slurry, which larger particles are generally along the surface of the sloping table. The sloping table is equipped with at least one aerator positioned along the flow path of the slurry, downstream of the disperser which aerates the conditioned ore slurry. The particles coated with the flotation reagent form agglomerates with gas bubbles produced by the aerator. These agglomerates float at a higher level within the slurry than the non-coated, non-agglomerating ore particles. A splitter is positioned near an open end of the sloping table. The splitter height above the surface of the sloping table is adjustable for intersecting the conditioned ore slurry at differing levels. The splitter separates the agglomerative, coated particles floating at a higher level from the non-agglomerative, non-coated particles floating at a lower level in the slurry.
摘要:
A method of de-inking cellulosic fibrous materials comprising: a. admixing an alkaline reagent selected from the group consisting of ammonium hydroxide and hydrogen peroxide and mixtures thereof with an aqueous suspension of inked cellulosic fibrous material such that they react at the ink particle/cellulosic fiber interfaces to dislodge ink particles from the cellulosic materials; and b. removing the dislodged ink particles from the aqueous suspension.