Prescription Stimulant Misuse Amongst University Students in Health Programs

Prescription stimulant misuse (PSM) is characterized by the consumption of stimulant substances for a motive other than its intended purpose. Psychostimulants are commonly prescribed for attention-deficit disorders. With an increasing number of attention-deficit diagnoses in young adults, there has also been a higher diversion rate of these drugs among peers. Stimulants have become the second most abused drug on college campuses, only behind marijuana. This study explores the attitudes, motives, and behaviors behind PSM among college students in health-related majors drawing upon the results of an anonymous survey of students in health-related programs conducted at a medium-sized university in the southeastern United States

First-principles study of ground state properties and high pressure behavior of ThO2

The mechanical properties, electronic structure and phonon dispersion of ground state ThO$_{2}$ as well as the structure behavior up to 240 GPa are studied by using first-principles density-functional theory. Our calculated elastic constants indicate that both the ground state fluorite structure and high pressure cotunnite structure of ThO$_{2}$ are mechanically stable. The bulk modulus, shear modulus, and Young's modulus of cotunnite ThO$_{2}$ are all smaller by approximately 25% compared with those of fluorite ThO$_{2}$. The Poisson's ratios of both structures are approximately equal to 0.3 and the hardness of fluorite ThO$_{2}$ is 27.33 GPa. The electronic structure and bonding nature of fluorite ThO$_{2}$ are fully analyzed, which show that the Th-O bond displays a mixed ionic/covalent character. The valence of Th and O ions in fluorite ThO$_{2}$ can be represented as Th$^{3.834+}$ and O$^{0.452-}$. The phase transition from the fluorite to cotunnite structure is calculated to be at the pressure of 26.5 GPa, consistent with recent experimental measurement by Idiri \emph{et al}. \cite{Idiri}. For the cotunnite phase it is further predicted that an isostructural transition takes place in the pressure region of 80 to 130 GPa.Comment: 9 pages, 10 figure

Prescription Stimulant Misuse Amongst University Students in Health Programs

Prescription stimulant misuse (PSM) is characterized by the consumption of stimulant substances for a motive other than its intended purpose. Psychostimulants are commonly prescribed for attention-deficit disorders. With an increasing number of attention-deficit diagnoses in young adults, there has also been a higher diversion rate of these drugs among peers. Stimulants have become the second most abused drug on college campuses, only behind marijuana. This study explores the attitudes, motives, and behaviors behind PSM among college students in health-related majors drawing upon the results of an anonymous survey of students in health-related programs conducted at a medium-sized university in the southeastern United States

Etude par diffraction X des modifications structurales induites par la pression dans differents composes d'actinides: les dioxydes AnO_2 (An=Th, Pu, Am), les tetrachlorures AnCl_4 (An=Th, U), les borures UB_x (x=2, 4, 12) et le carbure UC_2

SIGLEAvailable from INIST (FR), Document Supply Service, under shelf-number : TD 80734 / INIST-CNRS - Institut de l'Information Scientifique et TechniqueFRFranc

Mésusage du sulfate de morphine

MONTPELLIER-BU Pharmacie (341722105) / SudocSudocFranceF

PCR-Based Cloning and Differential Screening of RNAs from Xenopus Primordial Germ Cells - 4

Primordial germ cells (PGCs) are a small population of unique cells from which all germ cells arise in an organism. In this sense, PGCs can be considered the stem cells of the species. An important characteristic of PGCs is their ability to remain developmentally totipotent,whereas somatic cells become restricted in their fates. Understanding the genetic program that underlies the retention of totipotency is a major goal in the stem cell field. To accomplish this goal, methods must be considered for both the isolation of these cells and the purification of the RNAs they express. The isolation of PGCs from any organism presents certain challenges. Because PGCs arise outside the gonad during early embryogenesis, their exact location within a germ layer is unknown. In addition, PGCs are relatively rare in number compared to somatic cells (on the order of 0.05% or less). This chapter presents detailed procedures for isolating live PGCs from Xenopus laevis embryos and for cloning their expressed genes, should be applicable to other organisms that have PGCs rich in mitochondria

Developments and new possibilities in high pressure powder diffraction with synchrotron radiation. Results for cerium metal and U6FeU_6Fe

Equipment for high pressure experiments at variable temperatures is described. Measurements of U6Fe at ambient temperature up to 50 GPa show no phase transition. The bulk modulus B0=135 GPa and its pressure derivative (B′0=4.4) were obtained for U6Fe. Measurements of Ce were performed both at ambient temperature up to 64 GPa, and at 93 K up to 43 GPa. The tetragonal bc phase of Ce that forms above 26 GPa is unchanged in the extended pressure range, but shows less compressibility at low temperature