Methods of stabilizing DNA-engineered crystals can include cross-linking the hybridized oligonucleotides. Stabilized crystals can have improved chemical and thermal stability.

The present disclosure provides anti-bed bug monoclonal antibodies and antigen-binding fragments thereof as well as compositions and kits comprising the same. The present disclosure also provides methods of making monoclonal antibodies and antigen-binding fragments thereof and methods of using the same to detect bed bugs.

A ferrous modified selenium sol for inhibiting accumulation of cadmium and arsenic in rice and the preparation method and application thereof are disclosed. The method includes: dissolving an iron-containing compound and a selenium-containing compound into water; adding a reductant to the solution, and stirring until no more precipitation is generated, then adding carbonate, continuing to stir until no more precipitation is generated, and then filtering, taking the precipitation, and washing to obtain the precipitation of the selenium element and ferrous carbonate; adding an emulsifier to a citric acid buffer solution to obtain an emulsified citric acid buffer solution; adding the precipitation of the selenium element and ferrous carbonate to the emulsified citric acid buffer solution to obtain a sol system; and evaporating to concentrate the sol system, and adjusting the pH to 4.5-8.5 to obtain a ferrous modified selenium sol for inhibiting the accumulation of cadmium and arsenic in rice.

The present disclosure provides anti-bed bug monoclonal antibodies and antigen-binding fragments thereof as well as compositions and kits comprising the same. The present disclosure also provides methods of making monoclonal antibodies and antigen-binding fragments thereof and methods of using the same to detect bed bugs.

The disclosure provides a method of producing a platinum colloid comprising reducing platinum ions by the use of a platinum ion solution, water, a nonionic surfactant, a pH adjusting agent, and a reducing agent, wherein the platinum ion solution contains platinum at a concentration of 20 w/v %, the nonionic surfactant is polysorbate 80, the pH adjusting agent is an alkaline metal salt, the reducing agent is a lower alcohol, the volume of the water is from 600 to 660 times that of the platinum ion solution, the volume of the nonionic surfactant is from 0.20 to 0.30 times that of the platinum ion solution, the volume of the pH adjusting agent as a 5 w/v % aqueous solution is from 10 to 30 times that of the platinum ion solution, and the volume of the reducing agent is from 27 to 37 times that of the platinum ion solution,
as well as the platinum colloid produced by the method.

An apparatus and process for creating uniformly sized, spherical nanoparticles from a solid target. The solid target surface is ablated to create an ejecta event containing nanoparticles moving away from the target surface. Ablation may be performed by laser or electrostatic discharge. At least one continuous planar electromagnetic field is placed in front of the solid target surface being ablated. The electromagnetic field manipulates at least a portion of the nanoparticles as they move away from the target surface and pass through the electromagnetic field to increase size and spherical shape uniformity of the nanoparticles. The manipulated nanoparticles are collected as a stable suspension in a fluid.

A method of making colloidal crystals using seed programmable atom equivalents (PAEs) and growth programmable atom equivalents (PAEs) for at least two stage growth. The seed and growth PAEs each include nanoparticles functionalized with oligonucleotides with sticky ends. Seed PAEs have sticky ends adapted to hybridize to each other to form a first duplex, and growth PAEs have sticky ends adapted to hybridize to a respective ones of the seed PAEs and to each other to form second, third, and fourth duplexes. Using base mismatches in the sticky ends of the growth PAEs and a two stage cooling, the first duplex having a higher melting temperature than the other duplexes nucleate the seed PAEs as seeds in a first stage and remaining duplexes form in a second lower temperature stage for growth on the seeds.

A process for producing doped nanoparticles, in particular for N-doped nanoparticles, includes a hydrothermal process using an organic nitrogen-containing compound or a mineral acid having at least one nitrogen atom. In particular, the photocatalytically active particles produced are characterized by a particularly high activity even in visible light.

Methods of stabilizing DNA-engineered crystals can include cross-linking the hybridized oligonucleotides. Stabilized crystals can have improved chemical and thermal stability.

A method for preparing a colloidal dispersion of precious metal nanoparticles free of organic adsorbates that have a molar weight above 100 g/mol, the colloidal dispersion of the precious metal nanoparticles obtained by the method according to the invention, solid and re-dispersed precious metal nanoparticles and products comprising colloidally dispersed or solid precious metal nanoparticles.