Selective Chemical Modulation of Interlayer Excitons in Atomically Thin Heterostructures.

Strongly bound interlayer excitons (Xs) in atomically thin transition metal dichalcogenide (TMDC) heterostructures such as MoS/WSe show promising optoelectronic properties for spin-valleytronics and excitonic devices. The ability to probe and control Xs is critical for the development of such applications. This Letter introduces a versatile chemical method for selectively tailoring interlayer excitons in TMDC heterostructures.

Occurrences, immunoglobulin classes, and biological activities of antibodies in normal human serum that are reactive with Cryptococcus neoformans glucuronoxylomannan.

Serum obtained from normal human subjects contains antibodies reactive in an enzyme-linked immunosorbent assay with the glucuronoxylomannan (GXM) of Cryptococcus neoformans. The frequency of occurrence of class-specific antibodies among normal subjects was 28% for immunoglobulin G (IgG), 98% for IgM, and 3% for IgA. Anti-GXM antibodies with kappa light chains occurred in 98% of normal subjects, while the occurrence of lambda light chains was 28%.

Genes controlling malathion resistance in a laboratory-selected population of Drosophila melanogaster.

The chromosomal locations of several genes responsible for increased malathion resistance in a laboratory-selected population of Drosophila melanogaster have been determined. These genes appear to be involved in the regulation of microsomal cytochrome P-450. A major gene on chromosome 2 (2-64) and at least two genes on chromosome 3 (near 3-58) control increased mixed function oxidase activity, and both larval and adult malathion resistance.