摘要:
A method for isolating nucleic acids is provided. The method includes providing a biological sample containing at least one nucleic acid, and mixing the biological sample with an isolating agent under a suitable condition to isolate the nucleic acids from the biological sample in single step, wherein the isolating agent contains 1-40 wt % of PEG and/or more than 30 wt % of low molecular weight alcohol, a salt, and a detergent. Isolated nucleic acids are bound to a solid support by changes in the solubility of nucleic acids. Additionally, the present invention further provides an isolating agent and kit for isolating nucleic acids.
摘要:
A method for isolating nucleic acids is provided. The method includes providing a biological sample containing at least one nucleic acid, and mixing the biological sample with an isolating agent under a suitable condition to isolate the nucleic acids from the biological sample in single step, wherein the isolating agent contains 1-40 wt % of PEG and/or more than 30 wt % of low molecular weight alcohol, a salt, and a detergent. Isolated nucleic acids are bound to a solid support by changes in the solubility of nucleic acids. Additionally, the present invention further provides an isolating agent and kit for isolating nucleic acids.
摘要:
Disclosed are a chaotropic agent; a reagent including a chaotropic agent and a lithium salt; a reagent kit including a chaotropic agent; a chaotropic agent, a reagent, a reagent kit, and a method for isolating a nucleic acid by use of a magnetic cellulose material; a method for binding a nucleic acid to a magnetic cellulose material; a method for isolating a nucleic acid; and a method for purifying a chromosome DNA. It is required that each of the chaotropic agents, the reagents, and the reagent kits works with at least one solid-phase, magnetic cellulose-containing carrier to isolate a nucleic acid from non-nucleic acid substances. In addition, each chaotropic agent includes an alcohol substance and a substrate solution for adjusting the alcohol substance to an appropriate concentration and thereby promoting binding of the nucleic acid in a sample to the magnetic cellulose.
摘要:
Disclosed are a chaotropic agent; a reagent including a chaotropic agent and a lithium salt; a reagent kit including a chaotropic agent; a chaotropic agent, a reagent, a reagent kit, and a method for isolating a nucleic acid by use of a magnetic cellulose material; a method for binding a nucleic acid to a magnetic cellulose material; a method for isolating a nucleic acid; and a method for purifying a chromosome DNA. It is required that each of the chaotropic agents, the reagents, and the reagent kits works with at least one solid-phase, magnetic cellulose-containing carrier to isolate a nucleic acid from non-nucleic acid substances. In addition, each chaotropic agent includes an alcohol substance and a substrate solution for adjusting the alcohol substance to an appropriate concentration and thereby promoting binding of the nucleic acid in a sample to the magnetic cellulose.
摘要:
An infrared-receiving device includes an infrared-receiving module, an expanded module, and a microprocessor control unit (MCU). The MCU receives a data pulse signal transmitted from the infrared-receiving module. The expanded module is electrically connected to the infrared-receiving module and the MCU to receive a substitution data pulse signal outputted from an external expanded device. The expanded module sends the substitution data pulse signal to the MCU to send a control command to an electronic appliance electrically connected to the MCU.
摘要:
An optical fiber connector includes a connector body and a lens block. The connector body defines a number of blind holes and a receiving room. The blind holes opens towards a first side of the connector body. The receiving room opens towards an opposing second side of the connector body The lens block includes a body portion and a number of protruding portions extending from a first side of the body portion. The lens block is received in the receiving room. The protruding portions are positioned between the body portion and the blind holes. The protruding portions are aligned with the respective blind holes. The body portion has a flat second side face free of protruding portions thereon, at an opposite side thereof to the protruding portions.
摘要:
An optical fiber connector includes a female connector and a male connector. The female connector includes a first main body and a first lens portion. The first main includes at least one positioning slit and at least one recess defined in an inner surface of the first main body in the at least one positioning slit. The male connector is used for engagement with the female connector, and includes a second main body and a second lens portion for optically coupling with the first lens portion. The second main body includes at least one positioning post configured for insertion into the corresponding at least one positioning slit and at least one protrusion protruding from the at least one positioning post configured for insertion into the corresponding at least one recess.
摘要:
An exemplary fiber optic connector includes four converging lenses and a main body. The four converging lenses each includes a base portion and two engaging portions protruding from the base portion. The main body includes a first surface and a second surface at two opposite sides thereof. The first surface has four first receiving holes defined therein for receiving four respective optical fibers. The second surface has four second receiving holes aligning with the four respective first receiving holes defined therein. In addition, the main body defines an inner surface in each second receiving hole and two first slots in the inner surface. Each second receiving hole is configured for fixedly receiving the base portion of corresponding converging lens with the two engaging portions engaging in the two first slots.
摘要:
An optical fiber coupling assembly includes a male optical connector and a female optical connector. The male optical connector includes an insulative base having a first surface, a second surface opposite to the first surface, and a male transmitting surface, first lenses mounted to the insulative base and exposed at the male transmitting surface, and a cover having an arm and a blocking plate. One end of the arm is fixed to the second surface, the other end of the arm resiliently attached to the blocking plate. The blocking plate is apart from the first lenses for covering the first lenses. The female optical connector faces the male transmitting surface. The female optical connector includes an insulative supporting member having a female transmitting surface facing the male transmitting surface, second lenses mounted to the female transmitting surface, and two spaced pushing members formed on the female transmitting surface.
摘要:
An optical fiber connector includes a number of optical fibers, a body, a number of supports and a cover. The body includes a number of lens portions at a first end thereof, a number of through holes at an opposite second end, and a recess located between the lens portions and the through holes. The through holes are in communication with the recess. The optical fibers extend through the respective through holes and terminate at the respective lens portions. The supports are formed in the recess. Each support supports and retains a portion of the corresponding optical fiber exposed in the recess. The cover is received in the recess. The cover has a number of slanted faces spatially corresponding to the respective supports. The slanted faces and the supports cooperatively securely sandwich the exposed portions of the optical fibers in the body.