摘要:
An embodiment includes a chordal replacement system comprising: a pledget coupled to a first suture length and at least one of a first needle and a first ferrule; a second suture length coupled to the pledget and at least a second needle; and a third suture length coupled to the pledget and at least a third needle; wherein the second and third suture lengths are not monolithic with each other and do not constitute a single suture. Other embodiments are described herein.
摘要:
The present invention relates to a method and composition for preventing surgical adhesions during surgery. Tissue surfaces and/or surgical articles involved in the surgery are separated by a biomaterial provided in the form of a non-crosslinked, decellularized and purified mammalian tissue (e.g. bovine pericardium). The biomaterial effectively inhibits fibrosis, scar formation, and surgical adhesions, while also serving as a scaffold for recellularization of the tissue site.
摘要:
The invention generally concerns the use of amino acid denaturants for denaturing or separating double standed nucleic acid molecules. More specifically, the present invention provides a method for the rapid isolation and recovery of a desired target DNA or RNA molecules from a mixture or library containing such molecules. The method involves the use of haptenylated probes and amino acid denaturants to select the desired molecules and eliminate the undesired library members from a sample. The invention also provides a method in which larger or full-length nucleic acid molecules can be isolated from the subpopulation of desired molecules.
摘要:
The present invention is directed to recombinant hosts which contain and express the Cla I Type-II restriction endonuclease and/or modification methylase genes. The present invention is also directed to vectors or DNA molecules which contain these gene, and to methods of producing the enzymes. One source of these enzyme is Caryophanon latum , although other microorganisms may be used to isolate the restriction endonuclease isoschizomers and modification methylase isoschizomers of the invention.
摘要:
The present invention is directed to compositions and methods for enhancing synthesis of nucleic acid molecules, particularly GC-rich nucleic acid molecules. Specifically, the invention provides compositions comprising one or more nitrogen-containing organic compounds having a formula selected from the group consisting of formula I and formula II (or salts or derivatives thereof), preferably 4-methylmorpholine N-oxide or betaine (carboxymethyltrimethylammonium), and further comprising one or more compounds selected from the group consisting of proline and an N-alkylimidazole compound, and more preferably proline, 1-methylimidazole or 4-mehtylimidazole. The invention further relates to methods for enhanced, high-fidelity synthesis of nucleic acid molecules, including via amplification (particularly PCR), reverse transcription, and sequencing methods. The invention also relates to nucleic acid molecules synthesized by these methods, to fragments or derivatives thereof, and to vectors and host cells comprising such nucleic acid molecules, fragments, or derivatives. The invention also relates to kits for synthesizing, amplifying, reverse transcribing or sequencing nucleic acid molecules comprising one or more of the compositions of the invention.
摘要:
The present invention is directed to methods for the production and isolation of nucleic acid molecules. In particular, the invention concerns isolation of mRNA molecules and the production and isolation of nucleic acid molecules (e.g., cDNA molecules or libraries), which may be single- or double-stranded. Additionally, the invention concerns selection and isolation of particular nucleic acid molecules of interest from a sample which may contain a population of molecules. Specifically, the invention concerns affinity-labeled primer-adapter molecules which allow improved isolation and production of such nucleic acid molecules, increasing both product recovery and speed of isolation.