Zircon geochemistry from early evolved terranes records coeval stagnant- and mobile-lid tectonic regimes.

Determining the mechanisms by which the earliest continental crust was generated and reworked is important for constraining the evolution of Earth's geodynamic, surface, and atmospheric conditions. However, the details of early plate tectonic settings often remain obscured by the intervening ~4 Ga of crustal recycling. Covariations of U, Nb, Sc, and Yb in zircon have been shown to faithfully reflect Phanerozoic whole-rock-based plate-tectonic discriminators and are therefore useful in distinguishing zircons crystallized in ridge, plume, and arc-like environments, both in the present and in deep time.

The Psychosocial Benefits of Biblioguidance Book Clubs.

Background: Pedagogical approaches that support young people's well-being and maximize their potential are among the Journal of School Health research priorities. A unique form of observational learning called biblioguidance could be a pedagogical approach.

Methods: We, a team of researchers and teachers, implemented biblioguidance book clubs with 10th-grade health education students.

Beliefs and Motivations Regarding Early Shared Reading of Parents From Low-Income Households: A Qualitative Study.

Objective: Parent-child "shared" reading is a catalyst for development of language and other emergent literacy skills. The American Academy of Pediatrics recommends that parents initiate shared reading as soon as possible after birth. Persistent disparities exist in reading resources, routines, and subsequent literacy outcomes, disproportionately impacting low-income households.

Comparison of δ C analyses of individual foraminifer (Orbulina universa) shells by secondary ion mass spectrometry and gas source mass spectrometry.

Rationale: The use of secondary ion mass spectrometry (SIMS) to perform micrometer-scale in situ carbon isotope (δ C) analyses of shells of marine microfossils called planktic foraminifers holds promise to explore calcification and ecological processes. The potential of this technique, however, cannot be realized without comparison to traditional whole-shell δ C values measured by gas source mass spectrometry (GSMS).

Methods: Paired SIMS and GSMS δ C values measured from final chamber fragments of the same shell of the planktic foraminifer Orbulina universa are compared.

Optoelectronic tweezers: a versatile toolbox for nano-/micro-manipulation.

The rapid development of micromanipulation technologies has opened exciting new opportunities for the actuation, selection and assembly of a variety of non-biological and biological nano/micro-objects for applications ranging from microfabrication, cell analysis, tissue engineering, biochemical sensing, to nano/micro-machines. To date, a variety of precise, flexible and high-throughput manipulation techniques have been developed based on different physical fields. Among them, optoelectronic tweezers (OET) is a state-of-art technique that combines light stimuli with electric field together by leveraging the photoconductive effect of semiconductor materials.