摘要:
Compositions and methods are disclosed for substantially liquid, gel, suspension, slurry, semisolid and/or colloid storage of biological samples following admixture with the herein disclosed storage composition, permitting substantial recovery of biological activity following storage without refrigeration. In certain embodiments, unfractionated blood or tissue samples may be stored without refrigeration for weeks, months or years in a form that permits recovery of intact DNA, RNA or protein components following the storage period.
摘要:
Die vorliegende Erfindung betrifft ein Verfahren zur Herstellung einer wässrigen Dispersion oder Suspension von oligomeren Diphenylmethan-4, 4'-diisocyanat-uretdionen und/oder Diphenylmethan-2,4'-diisocyanat-uretdionen, und die Verwendung der erhaltenen Dispersion oder Suspension als Haftvermittler zur Verbesserung der Haftfestigkeit zwischen Verstärkungsfasern und Kautschuken oder Elastomeren in Reifen, Antriebsriemen und Transportbändern.
摘要:
Die vorliegende Erfindung betrifft ein Verfahren zur Herstellung farbloser Polyisocyanate, insbesondere zur Verringerung der Farbe von Polyisocyanaten.
摘要:
Organic compounds for target identification, drug discovery, chemical library production, high-throughput screening, fluorophore conjugation, chemiluminescent compound conjugation, creation of proximity induced modulators (e.g., protein degraders)/chimeric molecules, or a combination thereof are described. The compounds can contain small molecule moieties for identification of their potential targets; an isocyanate, photoactivatable groups; chemical moieties for enrichment and detection of target-small molecule moiety interactions; proximity induced modulator element; fluorophores; chemiluminescent groups; or combinations thereof.
摘要:
Compositions and methods are disclosed for substantially liquid, gel, suspension, slurry, semisolid and/or colloid storage of biological samples following admixture with the herein disclosed storage composition, permitting substantial recovery of biological activity following storage without refrigeration. In certain embodiments, unfractionated saliva samples may be stored without refrigeration for weeks, months or years in a form that permits recovery of intact DNA following the storage period.
摘要:
A method produces a uretonimine-modified isocyanate composition having increased low-temperature tolerance. The method comprises providing a polyisocyanate composition comprising 4,4'-diphenylmethane diisocyanate (MDI) and reacting the polyisocyanate composition at a temperature of from about 90 °C to about 115 °C in the presence of a catalyst, and optionally a co-catalyst, such that the isocyanate groups react to form uretonimine oligomers. The reaction of the polyisocyanate composition is quenched with a quenching agent to produce an intermediate composition having an intermediate isocyanate value from about 25.5 to about 28.5. A second polyisocyanate composition is added to the intermediate composition in an amount sufficient to produce the uretonimine-modified isocyanate composition having a final isocyanate value of from about 29.0 to about 29.5.
摘要:
Die Erfindung betrifft ein Verfahren zur Herstellung flüssiger, lagerstabiler Carbodiimid- (CD) und/oder Uretonimiπ- (Ul) Gruppen aufweisender Isocyanatmischungen mit niedriger Farbzahl, dadurch gekennzeichnet, dass die Carbodiimidisierung in Gegenwart mindestens eines sekundären oder tertiären Amins, welches wenigstens einen aliphatischen oder cycloaliphatischen oder araliphatischen, ggf. substituierten und ggf. Heteroatome enthaltenden, Kohlenwasserstoffrest enthält, durchgeführt wird. die nach diesem Verfahren erhältlichen Isocyanatmischungen und deren Verwendung zur Herstellung von Abmischungen mit weiteren Isocyanaten bzw. zur Herstellung von Isocyanatgruppen enthaltenden Prepolymeren sowie von Polyurethankunststoffen, vorzugsweise Poly urethanschaumstoffen.
摘要:
Compositions and methods are disclosed for substantially liquid, gel, suspension, slurry, semisolid and/or colloid storage of biological samples following admixture with the herein disclosed storage composition, permitting substantial recovery of biological activity following storage without refrigeration. In certain embodiments, unfractionated blood or tissue samples may be stored without refrigeration for weeks, months or years in a form that permits recovery of intact DNA, RNA or protein components following the storage period.