bluuebunny/crossref_metadata_2025_split huggingface dataset:
Structure and Properties of the Stannides CeAuSn, Ce3Rh4Sn13, and Ce3Ir4Sn13
Authors: Niepmann Dirk , Pöttgen Rainer , Poduska Kristin M. , DiSalvo Francis J. , Trill Henning , Mosel Bernd D. 
Published: February 2015

Abstract
CeAuSn, Ce3Rh4Sn13, and Ce3lr4Sn13 were prepared by reaction of the elements in an arc-melting furnace and subsequent annealing at 970 K for two weeks. The three stannides were investigated by X-ray powder and single crystal techniques. CeAuSn crystallizes with the NdPtSb type, space group P63mc: a = 472.7(2), c = 771.6(3) pm, wR2 = 0.0230,208 F2 values, 11 variable parameters, and BASF = 0.40(2). The gold and tin atoms form a pronounced two-dimensional [AuSn] polyanion which consists of slightly puckered Au3Sn3 hexagons. ,19Sn Mössbauer data at 78 K show one signal at an isomer shift of δ = 1.90(7) mm/s subjected to unresolved quadrupole splitting of ΔEQ = 0.55(2) mm/s. Ce3Rh4Sn13 and Ce3lr4Sn13 adopt the cubic Yb3Rh4Sn13 type structure, space group Pm3n: a = 970.51(3) pm, wR2 = 0.0721, 267 F2 values (Ce3Rh4Sn13) and a = 972.29(6) pm, wR2 = 0.0850, 267 F2 values (Ce3lr4Sn13) with 14 variable parameters for each refinement. Striking structural motifs in Ce3Rh4Sn13 are condensed distorted trigonal [RhSn6] prisms with Rh-Sn distances of 266 pm. The polyhe­dral network leaves two different cages which are occupied by cerium (6c position) and tin (2a position) atoms. The Sn2 atoms show occupancy parameters of only 92% (Ce3Rh4Sn13) and 76% (Ce3Ir4Sn13) and an extremely large displacement parameter indicating a rattling of these atoms within the icosahedral Sn12 cages. Magnetic susceptibility measurements of Ce3Rh4Sn13 show paramagnetic behavior down to 2 K with an experimental magnetic moment of 2.45(2) μB/Ce. No magnetic ordering is observed. Magnetization measurements show a moment of 0.78(2) μB/Ce at 2 K and 5.5 T. Resistivity data reveal only a very weak tem­perature dependence. The two crystallographically different tin sites are resolved in the 119Sn Mössbauer spectrum which shows a signal at δ = 2.12(1) mm/s subject to quadrupole splitting of 1.54(1) mm/s, superimposed by a singlet at δ = 2.47(1) mm/s. The Seebeck coefficient of Ce3Rh4Sn13 is within a few μ V/K of zero over the temperature range of 10 - 300 K.
Metallkomplexe mit biologisch wichtigen Liganden, CXXXI*. Pentamethylcyclopentadienyl-Halbsandwich-Komplexe von Rhodium und Iridium mit Glycosyl-«-iminocarboxylaten als Chelat-Liganden / M etal C om plexes of Biologically Im portant Ligands, CXXXI*. Pentam ethylcyclopentadienyl Halfsandwich Complexes of Rhodium and Iridium with Glycosyl-a-im inocarboxylates as Chelate Ligands
Authors: Krawielitzki Stefan , Beck Wolfgang 
Published: February 2015

Abstract
The N-glycosyl-iminocarboxylate complexes Cp*M(Cl)N(R)=C(R')CO2 (M = Rh, Ir; R = glycosyl, R ’ = Me, Ph, CH2CHMe2) with a chiral metal atom are formed in a template reaction from [Cp*MCl2]2 (M = Rh, Ir), the 2-keto carboxylic acid and tetra-O-acetyl-β-Dglucosamine, D-glucosamine or D-glucamine as mixtures of two diastereoisomers and were characterized by analytical and spectroscopic methods.
Wechselwirkungen in Molekülkristallen, 167 [1, 2]. Kristallzüchtung und Strukturbestimmung von σ-Donator/Akzeptor- Komplexen zwischen 1,4-Dioxan und den Polyiod-Molekülen I2,I2C=CI2, (IC)4S sowie (IC)4NR (R = H, CH3) / Interaction in Molecular Crystals, 167 [1, 2]. C rystallization and Structure Determination of σ -Donor/Acceptor Complexes between 1,4-Dioxane and the Polyiodine Molecules I2,I2C=CI2, (IC)4S and (IC)4NR (R = H, CH3)
Authors: Bock Hans , Holl Sven 
Published: February 2015

Abstract
With 1,4-dioxane as the constant donor, five new donor/acceptor complexes with the polyiodine compounds I-I, I2C=CI2, tetraiodothiophene and two tetraiodopyrrole derivatives could be crystallized and their structures determined despite their decomposition in air. They provide interesting facets for selforganisation on crystallization: The 1,4-dioxane addition causes at best small structural changes of the polyiodine compounds. All adducts crystallize in chains of alternating donors and acceptors, which also staple separatedly. The direction of the contacts O···I depends on the incorporation of the 1,4-dioxane molecules into the iodine acceptor layers. The structural results correlate with those obtained for donor/acceptor complexes with organosulfur donors and, therefore, add to the rationalization of intermolecular interactions.
Darstellung, Reaktionen und 51V-NMR-spektroskopische Untersuchungen der Imidovanadium(V)-trichloride: RN=VCl3 (R = H, SiMe3, Alkyl)
Authors: Preuss Fritz , Fischbeck Uwe , Tabellion Frank , Pemer Jens , Frank Walter , Reiss Guido 
Published: February 2015

Abstract
Imidovanadium(V) Trichlorides The reactions of Me3SiN=VCl3 (1) with MeOH, PhOH, HCl, PyH+Cl- or LiOtBu have been studied. The reductive decomposition of 1 by hydrogen chloride in toluene yields HN=VCl3 as a labile intermediate which could be isolated only in a small amount. The syntheses of RN=VCl3 (R = neopent, nPr, cyclohex, CPh3, 1-Ad) and [(tBuN)2V2Cl4(μ-OC13H9)2] (15) are also described. All compounds obtained are characterized by 51V NMR spectroscopy, the fluorenolato complex 15 by X-ray diffraction analysis.
Wechselwirkungen in Molekülkristallen, 174 [1, 2]. Kristallzüchtung und Strukturbestimmung verschiedenartig Methyl-substituierter Imidodiphosphorsäuretetraphenylester / Interaction in Molecular Crystals, 174 [1, 2]. Crystal Growth and Structure Determination of Differently Methyl-Substituted Tetraphenyl Imidodiphosphates
Authors: Bock Hans , Heigel Erik 
Published: February 2015

Abstract
Four differently methyl-substituted tetraphenyl imidodiphosphates [(H3C)nC6H5-n]2PO-NH-PO[C6H5-n(C3)n] (n = 1, 2), i. e. the 4-, 3,4-, 3,5-and 2,3-derivatives, have been crystallized and their structures determined to gain information on the spatial requirements as ligands in the corresponding cesium salts. According to the packing coefficients calculated from the structural data, they increase in the sequence 4<3,5<3,4<2,3. The most perturbed structural motif is the hydrogen bonded, eight-membered of each the dimer subunits.
Synthesis, Structure, and Magnetic Properties of EuAgCd and YbAgCd
Authors: Fickenscher  , Kotzyba Gunter , Hoffmann Rolf-Dieter , Pöttgen Rainer 
Published: February 2015

Abstract
New intermetallic compounds EuAgCd and YbAgCd were synthesized in quantitative yield by reaction of the elements in sealed tantalum tubes in a high-frequency furnace. Both com­ pounds were investigated by X-ray diffraction on powders and single crystals: KHg2 type, Imma, a = 490.41(8), b = 771.0(1), c = 834.4(2) pm, wR2 = 0.0624, 255 F2 values, 12 variables for EuAgCd, and MgZn2 type, Pb3/mmc, a = 584.66(5), c = 946.83(9) pm, wR2 = 0.0502, 187 F2 values, 11 variables for YbAgCd. Owing to the very small difference in scattering power, no long range ordering of the silver and cadmium atoms is evident from the X-ray data, although Ag-Cd ordering is expected. The silver and cadmium atoms randomly occupy the mercury and zinc positions of the KHg2 and MgZn2 type structures, respectively. In EuAgCd the [AgCd] substructure consists of strongly puckered, orthorhombically distorted Ag3 Cd3 hexagons, while a three-dimensional network of face-and comer-sharing tetrahedra is observed in YbAgCd. The rare earth atoms fill the space between the Ag3 Cd3 hexagons (EuAgCd) or within the three-dimensional tetrahedral network (YbAgCd). Magnetic susceptibility measurements in­ dicate Pauli paramagnetism for YbAgCd and Curie-Weiss behavior above 60 K for EuAgCd with an experimental magnetic moment of 7.82(3) μB/Eu indicating divalent ytterbium and europium. Ferromagnetic ordering at Tc = 28.0(5) K is observed for EuAgCd. At 2 K and 5 T the saturation magnetization is 5.85(5) μB/Eu.
The Synthesis and Crystal Structure of a Dinuclear μ-Pyrazolato-N,N'-Bridged Dinickel(II) Complex of 1,3-Bis(2-hydroxy-4-methoxybenzylideneamino)propan-2-ol
Authors: Elmali A. , Kavlakoglu E. , Elerman Y. 
Published: February 2015

Abstract
Ligand The asymmetric unit of crystal of the title compound, [Ni2(L)(C3H3N2)] (L = 1,3-Bis(2-hydroxy-4-methoxybenzylideneamino)propan-2-ol, C3H3N2 = pyrazolate) contains two inde­pendent dinickel(II) complexes. In both molecules, the nickel(II) ions are bridged by the alkoxo group of the ligand and the N atoms of the pyrazolate group. Each nickel(II) ion is coordinated by two N and two O atoms, forming a square with trans-N2O2 geometry.
Bildung und Struktur von Tris(diphenylstibino)amin/Formation and Structure of Tris(diphenylstibino)amine
Authors: Balázs Lucia , Breunig Hans Joachim , Krüger Tamara , Lork Enno 
Published: February 2015

Abstract
Tris(diphenylstibino)amine (Ph2Sb)3N (1) is formed in 49.5% yield by ammonolysis of Ph2SbCl in liquid NH3, and as a side product of the synthesis o f Ph4Sb2 by reactions of Ph3Sb with Na and BrCH2CH2Br in liquid NH3. The structure of 1 was determined by single crystal X-ray diffraction. The crystals consist of molecules with an almost planar Sb3N core (sum of the angles at nitrogen: 352.14°).
Electrolysis of Tetrakis(4-N,N-dimethylammophenyl)methane -Fragmentation of a Tetraarylmethane under Oxidative Conditions
Authors: Zimmermann Thomas J. , Müller Thomas J. J. 
Published: February 2015

Abstract
Upon anodic oxidation tetrakis(4-N,N-dimethylaminophenyl)methane (3) fragments to give the stable species crystal violet (6), N,N,N′,N′- and Michler’s hydrol blue (12) that can be readily absorption bands.
Improved Nutrition Delivery and Nutrition Status in Critically Ill Children With Heart Disease
Authors: Kaufman Jon , Vichayavilas Piyagarnt , Rannie Michael , Peyton Christine , Carpenter Esther , Hull Danielle , Alpern Jennifer , Barrett Cindy , da Cruz Eduardo M. , Roosevelt Genie 
Published: February 2015

BACKGROUND:
This initiative sought to improve nutrition delivery in critically ill children with heart disease admitted to the cardiac ICU (CICU) and neonates undergoing stage 1 palliation (S1P) for single-ventricle physiology through interdisciplinary team interventions. Specific goals were increased caloric and protein delivery for all patients and a more nourished state for infants with single ventricles at the time of discharge.

METHODS:
We developed a nutrition flow sheet in the electronic health record to track whether daily nutrition goals were met. Interventions included nurses reporting daily whether caloric and protein goals were met, mandatory involvement of feeding specialists, and introduction of an enteral nutrition guideline. For infants undergoing S1P, weight-for-age z score (as an indicator for assessing malnutrition) was calculated at admission and discharge.

RESULTS:
The percentage of patient days per month when daily caloric goals were met increased from 50.1% to 60.7%, and protein goals met increased from 51.6% to 72.7%. Hospital length of stay, need for ventilation, and mortality did not differ. Patients undergoing S1P demonstrated a statistically significant improvement in weight-for-age z score compared with the preintervention group (P = .003). Thirteen S1P patients were discharged undernourished in the preintervention group; 5 were severely undernourished. In the intervention group, 4 patients were discharged undernourished, and none were severely undernourished.

CONCLUSIONS:
This initiative resulted in improved nutrition delivery for a heterogeneous population of cardiac patients in the CICU as well as significant improvements in weight gain and nourishment status at discharge in infants undergoing S1P.
Understanding the 1600°C Fuel Temperature Limit of TRISO Coated Fuel Particles
Authors: Trejo Félix Cancino , Padilla Mariana Sáenz , López-Honorato Eddie 
Published: February 2015

ABSTRACTThe TRISO (tristructural isotropic) coated fuel particle is made of a uranium oxide kernel coated with three layers of pyrolytic carbon and one of silicon carbide. This fuel, originally used in High Temperature Reactors, has been proposed as accident tolerant fuel for Light Water Reactors after the accident in Fukushima. Although this fuel is capable of retaining fission products within the particle up to 1600°C, little is known on the origin of this temperature limit. Therefore, in order to increase the safety of this type of fuel, it is necessary to understand the origin of the degradation of the materials that compose this fuel. We have studied the effect of temperature on the microstructure and diffusion of silver in pyrolytic carbon coatings produced by fluidized bed chemical vapor deposition. Samples were heat treated at 1000°C, 1400°C and 1700°C for 200 hrs. under inert atmosphere. The effect of temperature on the microstructure and silver diffusion behavior were analyzed by Raman spectroscopy, X-Ray diffraction, optical microscopy, SEM and TEM. We observed that the microstructure of PyC changed drastically above 1400°C, showing the increase in anisotropy and the re-orientation of the graphene planes. The diffusion of silver appears to be also correlated with this change in microstructure.
The Vacancy Effect on Thermal Interface Resistance between Aluminum and Silicon by Molecular Dynamics
Authors: Zhang Yingying , Qian Xin , Peng Zhan , Yang Nuo 
Published: February 2015

ABSTRACTThermal transport across interfaces is an important issue for microelectronics, photonics, and thermoelectric devices and has been studied both experimentally and theoretically in the past. In this paper, thermal interface resistance (1/G) between aluminum and silicon with nanoscale vacancies was calculated using non-equilibrium molecular dynamics (NEMD). Both phonon-phonon coupling and electron-phonon coupling are considered in calculations. The results showed that thermal interface resistance increased largely due to vacancies. The effect of both the size and the type of vacancies is studied and compared. And an obvious difference is found for structures with different type/size vacancies.
An REU in Glass Science – Lessons and Legacy for Undergraduate Materials Education
Authors: Heffner William , Jain Himanshu 
Published: February 2015

ABSTRACTTwo important goals of the International Materials Institute for New Functionality in Glass (IMI-NFG) have been: (a) to facilitate international collaboration in glass research and, (b) to support the training of a professional workforce [1]. The REU program has been an important component of its mission since 2005. Glass science provides the central theme of our program, which has both an international and domestic component. In this paper we provide a summary of our accomplishments and experiences with this innovative, materials focused, multidisciplinary REU program. While glass provides the unifying theme of our program, the research topics and project advisers come from various departments, including not only materials science and engineering, but also biology, physics, environmental and civil engineering, electrical engineering, etc. This mode of REU operation has provided an effective means to introduce faculty from other departments to new, interdisciplinary applications of glass as an enabling material for their own work.For the domestic REU, we partner with the Physics REU Program at Lehigh, sharing many crucial administrative aspects including housing, seminars and social events. The complementary approach of the two REU programs has been very beneficial to both of them. We summarize approaches to recruitment, selection and creating an environment conducive to cohesive and motivated community of young researchers. While the majority of student experiences have been through individual projects, we have also experimented with small teams headed by a single adviser. Because the teams can exploit the combined strengths of its members, they can accommodate a greater diversity of individual student skills and experiences. Such projects tend to provide opportunity for open-ended exploration within the context of a general goal. Some of the projects are specifically focused on developing low-cost, hands-on demonstrations for teaching glass science to others through a more experiential and intuitive approach. All of these REU projects have been incorporated in an on-line collection of activities for the science education community at large, as reported previously [2,3].For the international component of REU, we have supported glass faculty in the country, who wish to engage their undergraduate students in a glass based summer research in the lab of an international colleague. These experiences require considerable preparation and individual attention. Here we discuss the challenges and successful strategies to deal with both the international and domestic programs.
Oxidation Protection of Multiphase Mo-Containing γ-TiAl-Based Alloys under Cyclic Test Conditions
Authors: Donchev A. , Pflumm R. , Galetz M. , Mayer S. , Clemens H. , Schütze M. 
Published: February 2015

ABSTRACTIntermetallic titanium aluminides solidifying via the disordered β-phase are of great interest for several high-temperature applications in automotive and aircraft industries. In this paper the thermocyclic oxidation behavior of three β-solidifying γ-TiAl-based alloys at 800°C and 900°C in air, with and without fluorine treatment, is reported for the first time. The behavior of the well-known TNM alloy (Ti-43.5Al-4Nb-1Mo-0.1B, in at.%) is compared with that of two Nb-free model alloys which contain different amounts of Mo (Ti-44Al-3Mo and Ti-44Al-7Mo, in at.%). During thermocyclic high-temperature exposure in air a mixed oxide scale develops on all three untreated alloys. Small additions of fluorine in the subsurface region of the alloys change the oxidation mechanism from mixed oxide scale formation to alumina at both temperatures. The oxidation resistance of the fluorine treated samples was significantly improved compared to the untreated samples.
Nanosecond Fast Switching Processes Observed in Gapless-Type, Ta2O5–Based Atomic Switches
Authors: Tsuruoka Tohru , Hasegawa Tsuyoshi , Aono Masakazu 
Published: February 2015

ABSTRACTThe switching speed of a Cu/Ta2O5/Pt atomic switch between a high-resistance (OFF) state and a low-resistance (ON) state was evaluated by transient current measurements under the application of a short voltage pulse. It was found that the SET time from the OFF state to the ON state decreased as low as 1 ns, and the RESET time from the ON state to the OFF state reached a few ns using moderate pulse amplitudes. The switching time depends strongly on the pulse amplitude and the cell resistance before applying a voltage pulse. This observation indicates that oxide-based atomic switches hold potential for fast-switching memory applications. It was also found that Cu nucleation on the Pt electrode is likely to the rate-limiting process determining the SET time and the REST time appears to be preferentially determined by thermochemical reaction.
Measuring Public Health Practice and Outcomes in Chronic Disease: A Call for Coordination
Authors: Porterfield Deborah S. , Rogers Todd , Glasgow LaShawn M. , Beitsch Leslie M. 
Published: February 2015

A strategic opportunity exists to coordinate public health systems and services researchers’ efforts to develop local health department service delivery measures and the efforts of divisions within the Centers for Disease Control and Prevention’s National Center for Chronic Disease Prevention and Health Promotion (NCCDPHP) to establish outcome indicators for public health practice in chronic disease. Several sets of outcome indicators developed by divisions within NCCDPHP and intended for use by state programs can be tailored to assess outcomes of interventions within smaller geographic areas or intervention settings. Coordination of measurement efforts could potentially allow information to flow from the local to the state to the federal level, enhancing program planning, accountability, and even subsequent funding for public health practice.
Cervical Cancer Screening in a Sexually Transmitted Disease Clinic: Screening Adoption Experiences From a Midwestern Clinic
Authors: Meyerson Beth E. , Sayegh M. Aaron , Davis Alissa , Arno Janet N. , Zimet Gregory D. , LeMonte Ann M. , Williams James A. , Barclay Lynn , Van Der Pol Barbara 
Published: February 2015

Objectives. We examined whether a sexually transmitted disease (STD) clinic could reach women who had not received a Papanicolau (Pap) test in the past 3 years. We also explored staff attitudes and implementation of cervical cancer screening. Methods. Women (n = 123) aged 30 to 50 years were offered cervical cancer screening in an Indiana STD clinic. We measured effectiveness by the patients' self-reported last Pap test. We explored adoption of screening through focus groups with 34 staff members by documenting their attitudes about cervical cancer screening and screening strategy adaptation. We also documented recruitment and screening implementation. Results. Almost half (47.9%) of participants reported a last Pap test 3 or more years previously; 30% had reported a last Pap more than 5 years ago, and 11.4% had a high-risk test outcome that required referral to colposcopy. Staff supported screening because of mission alignment and perceived patient benefit. Screening adaptations included eligibility, results provision, and follow-up. Conclusions. Cervical cancer screening was possible and potentially beneficial in STD clinics. Future effectiveness-implementation studies should expand to include all female patients, and should examine the degree to which adaptation of selected adoption frameworks is feasible.
Regulatory Enforcement and Fiscal Impact in Local Health Agencies
Authors: Costich Julia F. , Rabarison Kristina M. , Rabarison Monika K. 
Published: February 2015

Objectives. We used a cross-sectional, retrospective study design to analyze the association between local health agency regulatory activities and revenues from nonclinical fees and fines (NFF).Methods. We extracted data from the 2010 National Association of County and City Health Officials (NACCHO) Profile Survey, the most recent report including NFF information, and used 2-part multivariable regression models to identify relationships between regulatory activities and revenue. We also interviewed LHD directors on access to revenue from fines.Results. NFFs generated substantial revenue for most LHDs, increasing in scope and amount with jurisdiction size for all but the largest municipalities. The greatest proportion of net revenue came from public pools, campgrounds and recreational vehicles, and solid waste disposal. For small and mid-sized LHDs, enforcement activities generated revenue in a dose–response pattern, with higher returns for increased activities. LHDs in decentralized governance states collected more NFF revenue than those in centralized states. States vary regarding LHD access to revenue from sanctions.Conclusions. The fiscal impact of changes in regulatory activity needs careful assessment to avoid unanticipated consequences of applicable law.
The Impacts of Local Health Department Consolidation on Public Health Expenditures: Evidence From Ohio
Authors: Hoornbeek John , Morris Michael E. , Stefanak Matthew , Filla Joshua , Prodhan Rohit , Smith Sharla A. 
Published: February 2015

We examined the effects of local health department (LHD) consolidations on the total and administrative expenditures of LHDs in Ohio from 2001 to 2011. We obtained data from annual records maintained by the state of Ohio and through interviews conducted with senior local health officials and identified 20 consolidations of LHDs occurring in Ohio in this time period. We found that consolidating LHDs experienced a reduction in total expenditures of approximately 16% (P = .017), although we found no statistically significant change in administrative expenses. County health officials who were interviewed concurred that their consolidations yielded financial benefits, and they also asserted that their consolidations yielded public health service improvements.