摘要:
Compounds of the formula ##STR1## wherein R.sub.o is --CH.dbd.CH--CH.sub.3 or --CH.dbd.CH--CF.sub.3 and R is .beta.-D-ribofuranosyl, .beta.-D-2-deoxyribofuranosyl or .beta.-D-arabinofuranosyl are useful as antiviral agents.
摘要:
C-5 Substituted cytosine nucleosides wherein the C-5 substituent is substituted alkyl, alkenyl or substituted alkenyl; and the pharmaceutically acceptable acid addition salts thereof, are useful as antiviral agents. A novel process for the preparation of the subject compounds is also disclosed.
摘要:
In one aspect, described herein are field effect chemical sensor devices useful for chemical and/or biochemical sensing. Also provided herein are methods for single molecule detection. In another aspect, described herein are methods useful for amplification of target molecules by PCR.
摘要:
The present invention is directed to method of using a collection of monomers capable of forming multimers as a fluorescence reporter in different applications such as ligand detection/screening, disease diagnosis, drug discovery or screening, fluorescent labeling and imaging, or other fluorescent methodologies. Each monomer in the collection includes one or more ligand elements useful for binding to a target molecule with a dissociation constant of less than 300 μM and a linker element connected to the ligand elements directly or indirectly through a connector. Association of linker elements of different combinations of monomers, with their ligand elements bound to the target molecule to form a multimer, will generate a unique fluorescent signature different from that produced by those monomers either alone or in association with each other in the absence of the target molecule, when subjected to electromagnetic excitement.
摘要:
A method for making a collated fastener assembly includes arranging a plurality of fasteners in a row parallel to one another, in a plane, and spaced from one another, preheating the fasteners, applying a molten polymer material onto the fasteners and conveying the fasteners with the polymer into a mold cavity. The fasteners are maintained in the plane. The polymer is molded onto the fasteners and between adjacent fasteners to form a molding having a collar encircling a shank of each fastener and a connecting portion between adjacent fasteners. The molding maintains the space between the fasteners. A cooling stream is introduced onto the fasteners and the molding as the fasteners and the molding exit from the mold cavity.
摘要:
A nail having an offset head is configured with a multi-step support gusset formed integrally between an undersurface of the offset head and a superior portion of a shank. The head of the nail is relatively thin, and the shank is positioned radially off center of the head. A first portion of the gusset defines an angle relative to the shank axis and the second portion of the gusset defines an angle relative to the shank axis different from that of the first portion. The support gusset reinforces the junction of the shank with the head, supports the toe of the head, and distributes the force of a load on the head through a longitudinal axis of the shank, preventing the toe from bending or yielding and prevents the shank from yielding to the stresses of the load applied.
摘要:
A fastener assembly for use in an associated fastener driving tool for driving a fastener from the assembly, in sequential order, into an associated substrate, includes a row of fasteners arranged substantially parallel to each other, each fastener having a shank and defining an axis and a collation system formed from a plastic material that is molded onto and adhered to the fasteners. The plastic material defines a collar portion at least substantially encircling the fastener shank and a connecting portion extending between and connecting adjacent collar portions. When the fastener is driven from the driving tool, the collar portion remains adhered to the fastener such that the collar portion penetrates the substrate with the fastener, and the connecting portion includes a preferentially weakened region to influence separation of the connecting portion from the collar at a desired location.
摘要:
Ligase detection reaction is utilized to distinguish minority template in the presence of an excess of normal template with a thermostable ligase. This process can be carried out with a mutant ligase, thermostable ligase, or a modified oligonucleotide probe. This procedure is particularly useful for the detection of cancer-associated mutations. It has the advantage of providing a quantitative measure of the amount or ratio of minority template.
摘要:
The present invention provides a method for identifying one or more low abundance sequences differing by one or more single-base changes, insertions, or deletions, from a high abundance sequence in a plurality of target nucleotide sequences. The high abundance wild-type sequence is selectively removed using high fidelity polymerase chain reaction analog conversion, facilitated by optimal buffer conditions, to create a restriction endonuclease site in the high abundance wild-type gene, but not in the low abundance mutant gene. This allows for digestion of the high abundance DNA. Subsequently the low abundant mutant DNA is amplified and detected by the ligase detection reaction assay. The present invention also relates to a kit for carrying out this procedure.
摘要:
Novel “bispolyamine” inhibitor compounds of polyamine transport are disclosed. These compounds are useful pharmaceutical agents for treating diseases where it is desired to inhibit polyamine transport or other polyamine binding proteins, for example cancer and post-angioplasty injury. These compounds display desirable activities both for diagnostic and research assays and therapy.