Abstract:
A process for making a cellular inorganic material is disclosed. In this process a sol is formed by dispersing inorganic particles having a size of less than 1000 ANGSTROM in a dispersant liquid. A liquid, immiscible in the dispersant liquid, is added to the sol. A stabilizing effective amount of surfactant is added to the sol prior to, concurrently with or subsequent to the introduction of the immiscible liquid. The stabilized sol is converted into a gel by increasing the viscosity of the sol. The gel is next treated such that the immiscible liquid is dispersed into a plurality of droplets or vaporized into an interconnected gaseous network wherein the gel becomes cellular. The dispersant liquid and the immiscible liquid are removed from the cellular gel followed by removal of the surfactant and sintering to form the cellular inorganic material. The above process may be supplemented by the additional inclusion of an inorganic material selected from the group consisting of inorganic whiskers and inorganic fibers introduced into the dispersant liquid along with the inorganic particles.
Abstract:
The invention relates to a process for the rapid, high yield conversion of select rare earth oxides or hydroxides, to their corresponding carbonates by contact with supercritical carbon dioxide.
Abstract:
A lesion localization marking wire (10) and needle assembly (30) for marking non-palpable lesions within the body. A marking device (10) having a helically wound coil of wire (14) attached to an end of the shaft (12) which is insertable into the body through a needle or cannula (30) for rotatingly anchoring the marking device (10) into a lesion or tumor (54) is provided. The needle or cannula (30) is inserted into the body with the marking device (10) positioned therein so that when the cannula is positioned proximate to a lesion (54) the shaft (12) of the marker is rotated to advance the marker (10) into the lesion to mark it for subsequent surgical procedures. A second helical wire (18) may be provided on the shaft (12) which cooperates with a wire guide device (40) attached to the needle (30) to enable the physician to determine the depth of the marking device (10) as it anchors into the lesion (54). In particular, the device is provided for marking for biopsy lesion of the breast.
Abstract:
A polypeptide of formula (I) having agonist or antagonist activity to delta opioid receptors. These compounds may be used to induce pharmacological or therapeutic effects, including analgesia, in animals.
Abstract:
An antitumor compound of formula (I), wherein R1 and R2 may be the same or different and are selected from the group consisting of hydrogen or lower alkyl which is non-substituted with halo, hydroxy or lower alkoxy, provided that the substituent is not on the -carbon; or R1 and R2 taken together with the nitrogen to which they are attached form a morpholion ring. R is a nitro-substituted aryl or nitro-substituted nitrogen, sulfur or oxygen containing heteroaromatic groups R3 and R4 are each independently hydrogen, an electron withdrawing group or lower alkyl which is unsubstituted or mono-substituted with alkyl or an electron withdrawing group.
Abstract:
A method and system for imaging a sample. The method includes the steps of generating an ultrasonic signal, directing the signal into a sample, which signal is distorted and contains a first order and higher order component signals at first and higher frequencies respectively. The received distorted signal is processed, and an image is formed, and then displayed, from one of the higher order component signals of the received distorted signal.
Abstract:
The present invention provides solid imprinted particles comprising recognition sites spaced on the surface thereof which selectively bind a preselected template compound (T), wherein said recognition sites are each defined by a shaped polymeric matrix conforming to the shape and size of T, comprising a unit of the formula -B-Det, wherein B is bound to the polymeric matrix and also comprises a functional group which reversibly binds to T, and Det is a moiety capable of generating a detectable signal which changes following binding of B to template compound T.
Abstract:
The present invention describes a method of sequestering nitric oxide from the bloodstream, endothelium or tissues of mammals by administering a cobalamin to such mammals. A method of treating diseases characterized by elevated nitric oxide levels in the bloodstream, endothelium or tissues is further provided. In particular, a method of treating sepsis by administering a therapeutic dose of hydroxocobalamin is described by the present invention. A method of alleviating systemic hypotension in a septic patient is further described by this invention. A pharmaceutical composition comprising a cobalamin in a concentration ranging from .5 to 50 mg composition/Kg body weight for mammals is also provided.
Abstract:
The present invention is directed to an exciplex formed from a pi -conjugated polymer and an electron donor or acceptor component. The present invention also relates to assemblies comprising said exciplex, their use in optoelectrical devices and method of enhancing optoelectrical properties of pi -conjugated polymers by forming said exciplex.