Abstract: Provided herein are methods of splitting droplets containing magnetically responsive beads in a droplet actuator. A droplet actuator having a plurality of droplet operations electrodes configured to transport the droplet, and a magnetic field present at the droplet operations electrodes, is provided. The magnetically responsive beads in the droplet are immobilized using the magnetic field and the plurality of droplet operations electrodes are used to split the droplet into first and second droplets while the magnetically responsive beads remain substantially immobilized.

Abstract: Systems and methods for measuring hemoglobin, G6PD activity, and or bilirubin activity in a sample, including measuring the absorbance of a sample, removing background interfering signals, and quantifying the relevant analyte. Systems and methods for reconstituting a reagent in a droplet actuator. Systems and methods for separating plasma from a whole blood sample on a droplet actuator, including combining a sample droplet with an agglutination reagent droplet and using a novel combination of droplet operations to split the sample into a plasma and an agglutinated red blood cell fraction.

Abstract: Provided herein are methods of splitting droplets containing magnetically responsive beads in a droplet actuator. A droplet actuator having a plurality of droplet operations electrodes configured to transport the droplet, and a magnetic field present at the droplet operations electrodes, is provided. The magnetically responsive beads in the droplet are immobilized using the magnetic field and the plurality of droplet operations electrodes are used to split the droplet into first and second droplets while the magnetically responsive beads remain substantially immobilized.

Abstract: Provided herein are methods of splitting droplets containing magnetically responsive beads in a droplet actuator. A droplet actuator having a plurality of droplet operations electrodes configured to transport the droplet, and a magnetic field present at the droplet operations electrodes, is provided. The magnetically responsive beads in the droplet are immobilized using the magnetic field and the plurality of droplet operations electrodes are used to split the droplet into first and second droplets while the magnetically responsive beads remain substantially immobilized.

Abstract: Aspects of embodiments may include methods for automated enzymatic detection of glucose-6-phosphate dehydrogenase (G6PD) activity. Aspects of embodiments may include methods for enzymatic detection of G6PD activity in droplets in oil. Aspects of embodiments may include a system including a droplet actuator. Aspects of embodiments may include a treatment method.

Abstract: Embodiments of present application are directed to microfluidic devices and particularly digital micro-plastic fluidic devices that are specifically designed to prevent sample contamination during sample processing, methods of manufacturing the same, and methods to improve sample analysis process by preventing sample contamination.

Abstract: A method comprising effecting a change in a shape of a droplet, wherein the droplet is disposed over a substrate in sensing proximity to a sensor and the droplet has a starting surface area exposed to the sensor; and producing an expanded surface area of the droplet in the sensing proximity exposed to the sensor, wherein the expanded surface area exposed to the sensor is greater than the starting surface area exposed to the sensor.

Abstract: The present disclosure generally relates to nucleic acid amplification systems and methods suitable for construction of nucleic acid samples, including construction of normalized nucleic acid libraries. In some embodiments, the method includes providing one or more input nucleic acid samples, contacting each of the input nucleic acid samples (e.g., input library) with a reaction mixture including first amplification or normalization primers and second amplification or normalization primers, wherein the first amplification or normalization primers are immobilized on a solid support and the second amplification or normalization primers are in solution phase, and amplifying the input nucleic acid samples under conditions such that substantially all of the first amplification or normalization primers are incorporated into amplification products. Further provided are systems and droplet actuator devices that are configured to carry out the methods disclosed herein.

Abstract: A method of providing a droplet in contact with a magnetically responsive bead and having a reduced quantity of a substance.

Abstract: Some embodiments disclosed herein provide methods of reducing reactive molecular species in a reaction carried out in a digital fluidics device having one or more electrodes by using a reaction mixture comprising an electron acceptor additive. In some embodiments, the presence of the electron acceptor additive reduces the presence of reactive molecular species in the reaction mixture. In some embodiments, the presence of the electron acceptor additive reduces the formation of gas bubbles in the digital fluidic device. Therefore, in preferred embodiments, the electron acceptor additive does not form a gas when reduced.

Abstract: Embodiments of present application are directed to microfluidic devices and particularly digital micro-plastic fluidic devices that are specifically designed to prevent sample contamination during sample processing, methods of manufacturing the same, and methods to improve sample analysis process by preventing sample contamination.

Abstract: Provided herein are methods of splitting droplets containing magnetically responsive beads in a droplet actuator. A droplet actuator having a plurality of droplet operations electrodes configured to transport the droplet, and a magnetic field present at the droplet operations electrodes, is provided. The magnetically responsive beads in the droplet are immobilized using the magnetic field and the plurality of droplet operations electrodes are used to split the droplet into first and second droplets while the magnetically responsive beads remain substantially immobilized.

Abstract: The present disclosure relates to the field of molecular biology and more specifically to methods for capturing and amplifying target polynucleotides on a solid surface.

Abstract: The invention provides droplet actuators and droplet actuator cassettes including reagent storage capabilities, as well as methods of making and using the droplet actuators and cassettes. The invention also provides continuous flow channel elements and techniques for using electrodes to manipulate droplets in flowing streams. The invention also discloses methods of separating compounds on a droplet actuator. Various other aspects of the invention are also disclosed.

Abstract: The present disclosure generally relates to nucleic acid amplification systems and methods suitable for construction of nucleic acid samples, including construction of normalized nucleic acid libraries. In some embodiments, the method includes providing one or more input nucleic acid samples, contacting each of the input nucleic acid samples (e.g., input library) with a reaction mixture including first amplification or normalization primers and second amplification or normalization primers, wherein the first amplification or normalization primers are immobilized on a solid support and the second amplification or normalization primers are in solution phase, and amplifying the input nucleic acid samples under conditions such that substantially all of the first amplification or normalization primers are incorporated into amplification products. Further provided are systems and droplet actuator devices that are configured to carry out the methods disclosed herein.

Abstract: The present disclosure relates to the field of molecular biology and more specifically to methods for capturing and amplifying target polynucleotides on a solid surface.

Abstract: The invention is directed to droplet actuator devices and assay methods. The invention includes assay methods of conducting an assay comprising combining a sample with an umbelliferyl derivative, wherein the sample potentially comprises an enzyme capable of cleaving the umbelliferyl derivative and where the umbelliferyl derivative comprises an umbelliferyl core modified with one or more modifying moieties.

Abstract: The invention is directed to droplet actuator devices and assay methods. The invention includes assay methods of conducting an assay comprising combining a sample with an umbelliferyl derivative, wherein the sample potentially comprises an enzyme capable of cleaving the umbelliferyl derivative and where the umbelliferyl derivative comprises an umbelliferyl core modified with one or more modifying moieties.

Abstract: Some embodiments disclosed herein provide methods of reducing reactive molecular species in a reaction carried out in a digital fluidics device having one or more electrodes by using a reaction mixture comprising an electron acceptor additive. In some embodiments, the presence of the electron acceptor additive reduces the presence of reactive molecular species in the reaction mixture. In some embodiments, the presence of the electron acceptor additive reduces the formation of gas bubbles in the digital fluidic device. Therefore, in preferred embodiments, the electron acceptor additive does not form a gas when reduced.

Abstract: The invention provides a droplet actuator designed for performing electroporation on cells in droplets. The invention also provides method and systems for performing electroporation on cells in droplets on a droplet actuator.