Field-Portable Microplastic Sensing in Aqueous Environments: A Perspective on Emerging Techniques.

Microplastics (MPs) have been found in aqueous environments ranging from rural ponds and lakes to the deep ocean. Despite the ubiquity of MPs, our ability to characterize MPs in the environment is limited by the lack of technologies for rapidly and accurately identifying and quantifying MPs. Although standards exist for MP sample collection and preparation, methods of MP analysis vary considerably and produce data with a broad range of data content and quality.

High contrast cleavage detection.

Photonic biosensors that use optical resonances to amplify signals from refractive index changes offer high sensitivity, real-time readout, and scalable, low-cost fabrication. However, when used with classic affinity assays, they struggle with noise from nonspecific binding and are limited by the low refractive index and small size of target biological molecules. In this Letter, we evaluate the performance of an integrated microring photonic biosensor using the high contrast cleavage detection (HCCD) mechanism, which we recently introduced.

Validity of the School-age Assessment of Attachment for moderate-risk, rural early adolescents.

Introduction: This study provides evidence of validity of the School-age Assessment of Attachment (SAA) through longitudinal comparison with the Preschool Assessment of Attachment (PAA) and with concurrent attachment assessments and measures of risk and parenting. Determining which assessment had the greatest validity with this moderate-risk sample would be of benefit to those working with troubled young people and their families.

Hypotheses: Children's SAA classifications were expected to correspond to their PAA, a behavioral attachment assessment, parenting, and risk.