Abstract: Microalgae combined with antibiotic-loaded neutrophil membrane-coated polymeric nanoparticles provide a hybrid microrobot having robust locomotion in the lungs in vivo toward effective treatment of pulmonary and gastrointestinal tract infections. The algae-nanoparticle hybrid microrobots are provided in methods of treatment of disease or conditions by administration for active in vivo delivery of therapeutics to the lungs or gastrointestinal tract. The microrobot system can be applied to treat a wide range of diseases, including viral pneumonia.

Abstract: A power converter for converting a DC input voltage into an AC output voltage, the power converter having a structure of Phi-2 type, and includes an input terminal for the DC input voltage, an output terminal for the AC output voltage, a power switch equipped with a control electrode, a first electrode and a second electrode linked to a reference potential, the power switch being configured to receive a drive signal at the control electrode, the converter further comprising a self-oscillating circuit, connected between the output terminal and the control electrode, and configured to supply and maintain a sinusoidal drive signal to the power switch from the output voltage.

Abstract: A biomimetic oxygen delivery carrier is provided by employing natural cell membrane as a stabilizer for fluorocarbon nanoemulsions. The resulting formulation exhibits a high capacity for delivering oxygen and can be used to successfully resuscitate subjects in need due to for example hemorrhagic shock. This natural-synthetic platform can alleviate the impact of blood shortages in clinical settings among other uses.

Abstract: A power converter for converting a DC input voltage into an AC output voltage, the power converter having a structure of Phi-2 type, and includes an input terminal for the DC input voltage, an output terminal for the AC output voltage, a power switch equipped with a control electrode, a first electrode and a second electrode linked to a reference potential, the power switch being configured to receive a drive signal at the control electrode, the converter further comprising a self-oscillating circuit, connected between the output terminal and the control electrode, and configured to supply and maintain a sinusoidal drive signal to the power switch from the output voltage.

Abstract: A convertible cart capable of being converted into a Bellman luggage cart, platform cart, or dolly cart. The convertible cart includes: (a) a platform having a third width, W3, (b) a first frame having a first width, W1, detachably coupled to the platform at a first position, (c) a second frame having a second width, W2, detachably coupled to the platform at a second position apart from the first position, (d) first coupling connector configured to detachably engage the first and second frame, respectively, with the platform, (e) a third frame having two ends detachably coupled to the first and second frame, respectively, (f) second coupling connector means detachably engage the third frame with the first and the second frame, respectively, and (g) a plurality of wheels operable mounted to the platform, in which W3>W2>W1.

Abstract: A multi-purpose fitness apparatus. The apparatus includes an extendable base, a height-adjustable weight-supporting frame, a resistance assembly providing adjustable resistance, an exercise mechanism, a detachable bench assembly, and a connecting mechanism connecting the exercise mechanism to the resistance assembly. The resistance assembly includes a supporting frame having a lower resistance support and an upper resistance support that is slidably coupled to the lower resistance support. A top spring-attachment member is mounted on the top end portion of the upper resistance support. A bottom spring-attachment member is moveably coupled to a vertical track member mounted on the lower resistance support. The movement of the bottom spring-attachment member is resisted by resistance from one or more resilient resistance members detachably affixed to the spring-attachment members. The amount of resistance is adjustable by selecting the number of the resistance members affixed.

Abstract: A convertible cart capable of being converted into a Bellman luggage cart, platform cart, or dolly cart. The convertible cart includes: (a) a platform having a third width, W3, (b) a first frame having a first width, W1, detachably coupled to the platform at a first position, (c) a second frame having a second width, W2, detachably coupled to the platform at a second position apart from the first position, (d) first coupling connector configured to detachably engage the first and second frame, respectively, with the platform, (e) a third frame having two ends detachably coupled to the first and second frame, respectively, (f) second coupling connector means detachably engage the third frame with the first and the second frame, respectively, and (g) a plurality of wheels operable mounted to the platform, in which W3>W2>W1.

Abstract: A multi-purpose fitness apparatus. The apparatus includes an extendable base, a height-adjustable weight-supporting frame, a resistance assembly providing adjustable resistance, an exercise mechanism, a detachable bench assembly, and a connecting mechanism connecting the exercise mechanism to the resistance assembly. The resistance assembly includes a supporting frame having a lower resistance support and an upper resistance support that is slidably coupled to the lower resistance support. A top spring-attachment member is mounted on the top end portion of the upper resistance support. A bottom spring-attachment member is moveably coupled to a vertical track member mounted on the lower resistance support. The movement of the bottom spring-attachment member is resisted by resistance from one or more resilient resistance members detachably affixed to the spring-attachment members. The amount of resistance is adjustable by selecting the number of the resistance members affixed.