A Hydrazine Polyuranate - Preparation and X-Ray Diffraction Data

The formation of a yellow precipitate upon addition of 500/o hydrazinewater solution to a diluted solution of uranyl nitrate in water was observed by R. Salvadori back in 19121• Author reported that the precipitate obtained from slightly alkaline solutions contains uranium in 6 + valence state and gave the formula of precipitate as (N2H5) 20 · 5 U03 • 8 H20

Thorium Transition Metals Ternary Germanides

New ternary germanides of the general compo sition ThM2Ge2 were found to exist in the systems Th-Cr-Ge, Th-Mn-Ge, Th-Fe -Ge, Th-Co- Ge, Th-Ni- Ge and Th- Cu-Ge. The crystal structure analysis by means of the x - ray powder diffraction method showed that these compounds are isostructural with the compounds ThM2Si2 (M = Cr, Mn, Fe, Co, Ni and Cu), discdvered in this labo.ratory,, The tetragonal unit cell contains two formula units. Space group is !4/mmm. The atomic positions of thorium and the transition metal are defined by special position 2(a) and 4(d), respectively, while the variabl e 2arameter z determining the position 4(e) of the germanium atoms was obtained by computing the ele ctroi;i. density distribution along the c-axis

The Floating-Zone Refining of Silicon by Electron Beam Heating

The contamination o.f a melt c aused by the material of the container is completely avoided by the float ing zoine method. For this reason the\u27 method, firstly realized by P. H. Keck and M. J. Golay1, is nowadays u sed very oft~n for obtaining various materials of extremely high purity. The method is especially valuable in the case of chemically active melts and certainly it is the best way for obtaining single c rystals when extreme purity is primarily required. Zone melting can be achieved by different heating techniques, high frequency being used mostly. Electron beam heating wais introduced by A. Calverley et al.2 Ln the case o f ma•terials with very high melting point it has the advantage over high frequency heating. In the present article an improvement of this method as well as details of the equipment and floating zone refining of silicon are described

The Preparation and Crystal Structure of Some Ternary Silicides Containing Uranium and Transition Metals

The crystal structure of some new ternary silicides of the general composition U 4M 5Si3 (M = Cr, Mn, Fe) h as been determined by means of the x-ray powder diffraction method. The structure which belongs to the C14 (MgZn2) type is characterized by a statistical distributio\u27n of both kinds of smaller atoms. The chemical composition of the monophase specimens is probably temperature dependent. At lower temperatures it may aproach the formula U2M 3Si. In some of these systems ternary compounds UM2Si2 were also identified. They were found to be isostructural with the previously reported ThM2Si2 compounds. A novel method for the preparation of uranium alloys with the use of the electron beam melting is described

Impact of Mental Health Comorbidities on Health Care Utilization and Expenditure in a Large US Managed Care Adult Population with ADHD

AbstractObjectiveTo estimate the health resource use (HRU) and expenditure of adult patients with attention deficit/hyperactivity disorder (ADHD) subsequently diagnosed with one or more mental health (MH) comorbidities.MethodsUsing Kaiser Permanente Southern California electronic medical records (January 1, 2006, to December 31, 2009), we identified adults with at least one ADHD diagnosis and at least two subsequent prescriptions fills for ADHD medication. The date of first MH comorbidity diagnosis after the index ADHD diagnosis was defined as the index transition date. Continuous eligibility 12 months before and after the index transition date was required. For patients with multiple transitions (≥2), the post-transition period reflected the 12 months after the second transition. HRU for all-cause inpatient, outpatient, emergency department, behavioral therapy, overall prescription fill counts, and ADHD-specific prescription fill counts and mean patient expenditure (2010 US $) were estimated. Generalized estimating equations were used to evaluate differences in HRU and expenditure between the pre- and post-transition periods, respectively.ResultsOf the 3809 patients with ADHD identified, 989 (26$1822 ± $306 and$4432 ± $301 (both P < 0.0001) in the single and multiple transition cohorts, respectively.ConclusionsTwenty-six percent of patients with ADHD transitioned to MH comorbid diagnoses. Increased HRU and expenditure were associated with MH transitions. Identifying of patients with ADHD at risk for MH comorbidities may help to improve their outcomes

Economic impact of childhood/adolescent ADHD in a European setting:the Netherlands as a reference case

Attention-deficit/hyperactivity disorder (ADHD) is a highly prevalent psychiatric disorder in children/adolescents. This study reviews available European-based studies of ADHD-related costs and applies the findings to the Netherlands to estimate annual national costs for children/adolescents from a societal perspective. A systematic literature search was conducted for primary studies in Europe, published January 1, 1990 through April 23, 2013. Per-person cost estimates were converted to 2012 Euros and used to estimate annual national ADHD-related costs based on the Dutch 2011 census, ADHD prevalence rates, family composition, and employment rates. Seven studies met the inclusion criteria. The average total ADHD-related costs ranged from a,not sign9,860 to a,not sign14,483 per patient and annual national costs were between a,not sign1,041 and a,not sign1,529 million (M). The largest cost category was education (a,not sign648 M), representing 62 and 42 % of the low- and high-value overall national estimates, respectively. By comparison, ADHD patient healthcare costs ranged between a,not sign84 M (8 %) and a,not sign377 M (25 %), and social services costs were a,not sign4.3 M (0.3-0.4 %). While the majority of the costs were incurred by ADHD patients themselves, a,not sign161 M (11-15 %) was healthcare costs to family members that were attributable to having an ADHD child/adolescent. In addition, productivity losses of family members were a,not sign143-a,not sign339 M (14-22 %). Despite uncertainties because of the small number of studies identified and the wide range in the national cost estimates, our results suggest that ADHD imposes a significant economic burden on multiple public sectors in Europe. The limited number of European-based studies examining the economic burden of ADHD highlights the need for more research in this area