Abstract:
In accordance with the present invention, disclosed is a method of conferring, upon a host cell, resistance to retroviral infection by interfering with one or more of the infection processes including retroviral replication and assembly into infective viral particles. The method involves introducing a vector into a host cell, wherein the vector comprises a polynucleotide which directs transcription, within the host cell, of RNA which is a) complementary or homologous, depending on the target region, to a nucleic acid sequence within one or more regions of the genome of the retrovirus; and b) is effective in inhibiting retroviral replication and/or interfering with assembly into viral particles when the host cell is infected. Also disclosed is a method of treatment using cells upon which resistance to infection has been conferred.
Abstract:
A lithium-iodine cell comprising a casing of electrically conducting material, an anode including a lithium element within the casing, an electrical conductor operatively connected to the lithium element and extending out from the casing, and a cathode comprising iodine-containing material in operative contact with both the casing and the lithium element. The anode electrical conductor is completely sealed from the rest of the cell, and the casing serves as the cathode current collector. The anode operative surface is provided with a coating of an organic electron donor material. The anode conductor is enclosed within the combination of an insulator element within the casing, an isolator element between the insulator and the conductor, and a ferrule having one end within the insulator and the other end extending from the casing. During assembly, the cathode material is introduced in heated form and a filling element is employed which serves to keep the edge of the casing open end clean to facilitate subsequent welding of a lid to the casing.
Abstract:
A method and apparatus for providing germicidal and healing treatment of tissue such as bone wherein an electrode of silver or like material is applied to a living tissue site to be healed, initially a direct voltage is applied to the electrode of a polarity driving the electrode as an anode to release silver ions to create a germicidal environment at the site, and thereafter a direct voltage of opposite polarity is applied to the electrode driving it as a cathode to stimulate healing of the tissue at the site. The apparatus is implanted in the body of a patient, and in one embodiment a battery is connected through a switch to the electrode and a reference electrode, the switch initially connecting the electrode as an anode and thereafter changeable by an external operator such as a magnet to connect the electrode as a cathode. In another embodiment, another electrode and an element cooperate with the treating electrode to form a galvanic couple with the treating electrode to create a germicidal environment and a predetermined time thereafter the arrangement changes to a biogalvanic couple with body fluid to cause healing of the tissue. In either embodiment a wave shaping circuit can be operatively associated with the treating electrode to facilitate external monitoring of the apparatus when implanted.
Abstract:
A cardiac pacemaker including a pulse generator and an electrical source such as a battery completely enveloped in a small size housing. An electrode operatively connected to the pulse generator has a helically-shaped portion extending outwardly from the housing in fixed relation thereto. The housing is of sufficiently small size to permit the pacemaker to be implanted in conjunction with a limited thoracotomy by turning the housing to rotatively insert the electrode into the heart tissue of the patient, i.e. into the myocardium. The housing can be of electrically conducting material, insulated from the electrode, and a portion of the housing can serve as an indifferent electrode.
Abstract:
A lithium-bromine cell comprising a casing which can be of electrically conducting material and containing a lithium anode element from which a sealed conductor extends through the casing. A filling element which can be of electrically conducting material and which has a passage therethrough is fixed to the sealed casing with one end of the passage in communication with the interior of the casing and the other end externally exposed. Bromine is introduced through the passage to the interior of the casing into operative relationship with the lithium anode whereupon the passage is closed to complete the cell. The electrically conducting casing serves as a cathode current collector in operative contact with the bromine cathode, and after closing of the passage the electrically conducting filling element serves as an electrical terminal for the cell. An electrical potential difference exists between the terminal and the anode conductor during operation of the cell.
Abstract:
A solid electrolyte primary cell comprising a lithium anode, a bromine cathode and a lithium bromide electrolyte. A solid lithium element operatively contacts the cathode material, and one form of cathode material is a charge transfer complex of an organic donor component material and bromine. The organic donor component material can be poly-2-vinyl pyridine. Another cathode material is liquid bromine. The surface of the lithium anode element which operatively contacts the cathode material can be provided with a coating of an organic electron donor component material. When the lithium anode operatively contacts the bromine cathode, a solid lithium bromide electrolyte begins to form at the interface and an electrical potential difference exists between conductors operatively connected to the anode and cathode.
Abstract:
An enclosure for a lithium-iodine cell including a first casing containing the cell components and a second casing containing the first casing. The first casing is disposed so that the lid thereof is adjacent the bottom of the second casing. Both casings are of a material which is non-reactive with iodine such as epoxy material. The first casing is encapsulated in a polyester material for electrical insulation and sealing against iodine migration. The second casing is placed in an hermetically sealed outer casing of metal, the second casing being spaced from the lid of the outer casing.
Abstract:
An improved 3He nuclear reactor with provision for direct electric conversion of a relativistic proton stream into useable electric power at a voltage level compatible with the national power grid (one million V DC). Various embodiments include multiple collector cages for extracting relativistic protons of various energy levels, diverter wires for deflecting high-energy proton streams to either side of lower energy cages to avoid unwanted impact. Other embodiments include arrangements for dividing multi-megavolt voltages down to a useable one megavolt level compatible with the national power grid. Further embodiments comprise guiding the proton stream by the cusps of magnetron cavities to permit conversion of the relativistic proton energies into microwave power. A proposal is also made for harvesting 3He from the Moon to supply earth-bound and space-bound reactors. A solution to the problem of charging a potential well-forming anode in an electrostatic fusion reactor without electrical arcing is further disclosed.
Abstract:
A high energy battery power source suitable for use in an implantable medical device includes an input, an output, and two or more battery modules each comprising two or more battery cells. The battery cells are of relatively low voltage and permanently configured within each battery module in an electrically parallel arrangement in order to provide a desired current discharge level needed to achieve high-energy output. A switching system configures the battery modules between a first configuration wherein the battery modules are electrically connected in parallel to each other and to the input in order to receive charging energy at the relatively low voltage, and a second configuration wherein the battery modules are electrically connected in series to each other in order to provide to the output a relatively high voltage corresponding to the number of battery modules at a current level corresponding to the number of battery cells in a single battery module. An alternate embodiment permanently connects the battery modules in series so that no switching system is need for discharging and charging. A technique that provides for the control of discharge voltages on a pulse-to-pulse basis is also disclosed.
Abstract:
An electromagnetic immune tissue invasive system includes a primary device housing. The primary device housing having a control circuit therein. A shielding is formed around the primary device housing to shield the primary device housing and any circuits therein from electromagnetic interference. A lead system transmits and receives signals between the primary device housing. The lead system is either a fiber optic system or an electrically shielded electrical lead system.