If they could be easily exfoliated, layered materials would become a diverse source of two-dimensional
crystals whose properties would be useful in applications ranging from …

This paper develops a new approach to the problem of testing the existence of a level
relationship between a dependent variable and a set of regressors, when it is not known with …

We have demonstrated a method to disperse and exfoliate graphite to give graphene
suspended in water−surfactant solutions. Optical characterization of these suspensions allowed …

To progress from the laboratory to commercial applications, it will be necessary to develop
industrially scalable methods to produce large quantities of defect-free graphene. Here we …

THE PURPOSE OF THIS PAPER is to provide a simple test of weak exogeneity (WE) in limited
information simultaneous limited dependent variable (LDV) models. This test can also be …

Data are presented on adult body mass for 230 of 249 primate species, based on a review
of the literature and previously unpublished data. The issues involved in collecting data on …

The basic reproductive ratio, R 0 , is defined as the expected number of secondary infections
arising from a single individual during his or her entire infectious period, in a population of …

With high surface area and novel properties, 2D materials are potentially useful for a range
of applications. In addition to graphene, many 2D compounds exist with BN, MoS 2, and Bi …

We studied the incidence of primary and recurrent cytomegalovirus infection in 3712 pregnant
women —2698 of middle to high income and 1014 of low income — to determine whether …

Objective: This report examines what is known about the relationship between obesity and
type 2 diabetes and how future research in these areas might be directed to benefit prevention…