摘要:
An instrument for performing highly accurate PCR employing a sample block in microtiter tray format. The sample block has local balance and local symmetry. A three zone film heater controlled by a computer and ramp cooling solenoid valves also controlled by the computer for gating coolant flow through the block controls the block temperature. Constant bias cooling is used for small changes. Sample temperature is calculated instead of measured. A platen deforms plastic caps to apply a minimum acceptable threshold force for seating the tubes and thermally isolates them. A cover isolates the block. The control software includes diagnostics. An install program tests and characterizes the instrument. A new user interface is used. Disposable, multipiece plastic microtiter trays to give individual freedom to sample tubes are taught.
摘要:
A thermal cycler for automatic performance of the polymerase chain reaction is provided. The thermal cycler comprises a heater control that provides close temperature control of the reaction.
摘要:
A thermal cycler for automatic performance of the polymerase chain reaction is provided. The thermal cycler comprises a heater control that provides close temperature control of the reaction.
摘要:
A two-piece plastic holder for loosely holding microliter sample tubes of a preselected design, each tube having a cylindrically shaped upper section open at its top end, a closed, tapered lower section extending downwardly therefrom, and a circumferential shoulder extending outwardly from the upper section at a position on the upper section spaced from the open end thereof. The holder includes a one-piece tray member and a one-piece retainer. The one-piece tray member including a flat, horizontal plate section containing holes in a rectangular array, a first vertical tray sidewall section around the plate extending upwardly to a height greater than the height of a tube resting in one of the holes, and a second vertical tray sidewall section around the plate extending downwardly approximately to the bottom of the upper section of a tube resting in one of the holes. The one-piece retainer is releasably engageable inside the tray over any sample tubes resting in the tray. The retainer comprises a flat, horizontal plate section containing holes in a rectangular array, and a vertical retainer sidewall section around the retainer plate section extending upwardly from the plate. When the retainer is engaged inside the tray, the retainer plate section lies slightly above the shoulder of a tube resting in the tray and the first tray sidewall section is about as high as the retainer sidewall section, so that tubes resting in the tray are retained loosely both vertically and laterally.
摘要:
A thermal cycler for automatic performance of the polymerase chain reaction is provided. The thermal cycler comprises a heater control that provides close temperature control of the reaction.
摘要:
An instrument for performing highly accurate PCR employing a sample block in microtiter tray format. The sample block has local balance and local symmetry. A three zone film heater controlled by a computer and ramp cooling solenoid valves also controlled by the computer for gating coolant flow through the block controls the block temperature. Constant bias cooling is used for small changes. Sample temperature is calculated instead of measured. A platen deforms plastic caps to apply a minimum acceptable threshold force for seating the tubes and thermally isolates them. A cover isolates the block. The control software includes diagnostics. An install program tests and characterizes the instrument. A new user interface is used. Disposable, multipiece plastic microtiter trays to give individual freedom to sample tubes are taught.
摘要:
A one-piece sample tube for use in a PCR thermal cycler having a first substantially cylindrically shaped upper wall section having an external conically beveled shoulder moulded around the entire circumference of the section, the thickness of the wall section above the shoulder being about 0.022 inches and the thickness of the wall section below the shoulder being about 0.015 inches. The sample tube further includes a second lower wall section having a frustrum of a cone shape with an included angle of about 17 degrees, the lower wall section having a thickness of 0.009 inches the second section holding about 100 microliters of liquid. The tube is compliant and made from polypropylene and is autoclavable.