bluuebunny/crossref_metadata_2025_split huggingface dataset:
Influence of pH on the Absorption and Fluorescence Spectra of 6,7-Dihydroxycoumarin in Aqueous Solution
Authors: Grzywacz Jerzy , Taszner Stanisława 
Published: February 2015

Abstract
Absorption and emission spectra of 6,7-dihydroxycoumarin [6,7-DHC] in aqueous solution over a wide pH range are reported. The absorption spectra proved to be strongly sensitive to the pH-value of the solution, whereas the emission spectra change in this range only insignificantly.
An interpretation is attempted on the basis of the differences of the acid-base properties of the 6,7-DHC molecule in its ground and excited singlet state. For this purpose the pKa's and pKa
x's values have been calculated. It has been stated that in the excited state the phototautomer form is very unlikely.
Dielectric Relaxation of Long Molecules in Nematic Host Matrices
Authors: Gerber Paul G. 
Published: February 2015

Abstract
The relaxation times τ of the slowest processes in the parallel dielectric permittivity of various nematic guest-host systems have been measured as a function of temperature. A correlation between τ and its temperature dependence is found, indicating increasing temperature dependence for increasing τ, independent of structural details of the guest molecules or properties of the host matrices which, however, had similar clearing temperatures. Alternations in τ for a homologous series of guest molecules are observed. Increasing host permittivity leads to increased values of τ while the viscous properties of the host show little influence on τ.
Relative Stability of ᗒAl—O—Al ᗕ Linkages in Zeolites. A Nonempirical Molecular Orbital Study
Authors: Sauer Joachim , Engelhardt Günter 
Published: February 2015

Abstract
Nonempirical quantum chemical STO-3G calculations were performed for cluster models of two oxygen-bridged TO4 tetrahedra (T = Si, Al). The models are based on [(HO)3TOT(OH)3]n− structures and, in case of Al-containing models (n = 1,2), their electric neutrality is ensured by adding positive point charges.
The calculations suggest the occurrence of ᗒAl - O -Al ᗕpairings provided certain electric fields act at the corresponding sites.
Notizen: Allowance for a Different Pairing of 5-Fluorouracil
Authors: Giambiagi Myriam S. de , Giambiagi Mario , Esquivel Darci M. S. 
Published: February 2015

Abstract
A different pairing of 5-fluorouracil with adenine and guanine is proposed; this pairing may contribute to explain its mutagenic effect. IEHT charges and bond indices support the assumption.
The Influence of Contact Adsorbed Ions on the Photoelectrochemical Behaviour of α-HgS
Authors: Repenning D. , Schumacher R. , Schindler R. N. 
Published: February 2015

Abstract
Results are reported to describe the influence of additives on the photoelectrochemical properties of the liquid junction α-HgS/electrolyte. The semiconductor electrodes were prepared by sublimation of α-HgS on Au substrates. The electrolyte was modified by additives such as Cl-, Br-, J-, and CN- ions. It was found that these anions play an important role in determining the flat band Vfb and the transition potential Vtr. Generally, both the nature and the concentration of the additives affect Vfb and Vtr.The results are interpreted in terms of contact adsorption of the used anions. It is further indicated that the adsorptive properties can be correlated to a possible chemical reaction of mercury cations with halide anions to form insoluble layers at the surface.
Notizen:On the Behaviour of Light in a Spherically Symmetric Aether Field
Authors: Sjödin Torgny 
Published: February 2015

Abstract
The formulae for the bending of light and retardation of light signals near point masses are obtained in a very simple and natural way making use of classical optics. This is accomplished by characterizing the aether density in each point through a refraction index and assuming that the velocity of light is inversely proportional to this index. The results agree with General Relativity and with made experiments.
A Comparative X-Ray Diffraction Study of Aqueous MnSO4 and Crystals of MnSO4·5H2O
Authors: Caminiti R. , Marongiu G. , Paschina G. 
Published: February 2015

Abstract
X-ray single crystal analysis of MnSO4·5H2O shows that the manganese atoms are octahedrally coordinated by oxygen atoms, four of which belong to water molecules and two to sulphate groups.
A model derived from the crystal structure was fitted to the X-ray scattering intensities from aqueous MnSO4. Good agreement with experimental data is achieved using a model in which Mn(H2O)6-z(OSO3)z
+2-2z interacts with about ten water molecules and each sulphate ion with about seven water molecules.
Amorphous Fe72Cr8P13C7 Powder with High Corrosion Resistance
Authors: Cho Kangjo , Hwang Choll-Hong , Pak Chang-Su , Ryeom Yeong-Jo 
Published: February 2015

Abstract
Amorphous Fe72Cr8P13C7 powder has been prepared by the spark erosion technique and its corrosion behavior investigated potentiodynamically. It is concluded that the powder prepared this way possesses a relatively high corrosion resistance, as does amorphous Fe72Cr8P13C7 ribbon prepared by rapid quenching.
Experimental Verification of the Theory on Rotational Motions of Prolate Luminescent Molecules in Solution
Authors: Kawski A. , Kukielski J. , Alicka M. , Kubicki A. , Waśniewski T. 
Published: February 2015

Abstract
Theories I [1] and II [2] on rotational motions of prolate molecules in solvents of different viscosities were verified for a series of luminescent compounds, the transition moments of which lie along their longer axes. Better agreement between the experimental and theoretical results was found with theory I. Effective volumes and moments of inertia were determined for the molecules studied.
Ionization of Organic Molecules by Fast Molecular Ion Bombardment
Authors: Wong S. S. , Stoll R. , Röllgen F. W. 
Published: February 2015

Abstract
The bombardment of organic samples by the ionization products of trimethyl-pentaphenyl trisiloxane was found to have a strong effect on the sputtering yield of molecular parent ions of thermally labile compounds. For the tetra-saccharide stachyose an order of magnitude higher yield was obtained with fast molecular ion than with fast Hg atom bombardment. This difference decreased from tetra to disaceharides and was smallest for arginine.
Miscibility Gaps in Fused Salts. Note XII. Systems Formed with Thallium (I) Halides and Lithium or Sodium Halides: the Ternary Li, Tl/Cl, I
Authors: Flor Giorgio , Margheritis Chiara , Vigano’ Giuseppina Campari , Sinistri Cesare 
Published: February 2015

Abstract
Demixing was investigated in the molten salt families formed with thallium (I) halides and lithium or sodium halides. Measurements were carried out on the twelve stable diagonals of the corresponding reciprocal ternary mixtures. Liquid-liquid equilibria were found in the three systems TlCl+LiF, TlBr+LiF and TlI+LiCl while in the two systems formed with Til and LiF or NaF measurements could not be carried out owing to the thermal instability of Til.
The reciprocal ternary Li, Tl/Cl, I exhibits demixing in a temperature range which is convenient for investigation: therefore the whole composition square was studied. The upper critical solution point of the gap lies along the stable diagonal at 734°C and xLiCl = 0.58. The projection of the stratification lens occupies 38.8% of the composition square. Moreover an “a priori” prediction of the liquid-liquid equilibria was carried out by means of the conformal ionic solutiontheory.
Electrical Resistivity of Metals at Low Temperatures
Authors: Bohn H.-J. , Simon G. 
Published: February 2015

Abstract
For the system of the coupled Boltzmann transport equations for electrons, phonons and impurities in metals the influence of the crosscoupling terms is investigated. It is shown that this results at low temperatures in a contribution to the electrical resistivity proportional to 1/√T. This is due to the fact that by phonon-impurity scattering the phonon-drag contribution is influenced by the presence of the impurities. A comparison with recently published experimental work is made.
Introducing Teenagers to a Dialogue with Judaism as the Task of School Catechesis
Authors: Kostorz Jerzy 
Published: February 2015

This analysis proves that introducing teenagers to a dialogue with Judaism is one of catechesis’s tasks. This task has been outlined in the post-conciliar documents of the Catholic Church. It underlines the spiritual ties between Catholic people and the Jews and promotes forming an attitude of openness towards followers of the Mosaic religion. It also contributes to mitigating anti-Semitism among Catholic teenagers. At the same time, it raises interest in Jewish traditions and culture. In the religion syllabus in lower and post-secondary schools we can come across numerous references (mainly indirect) to Judaism. The focus on passing honest knowledge about Judaism can be also clearly visible. In this way, formation of the cognitive element of inter-religious dialogue takes place. On the other hand, less attention is devoted to other components of this attitude such as the emotional and behavioural elements. That is why there is a demand to complete the lacking elements by watching films and having discussions. The above mentioned multimedia materials called “The religion lesson” have been prepared to satisfy this need.Great importance is also attached to creating situations that allow Christian teenagers to participate in meetings with the Jews. It can be organized in the form of Days of Judaism and panel discussions with Jews and distinguished contemporary theologians and philosophers. Open meetings with representatives of Judaism are a great opportunity to perceive the Jews as “older brethren in the faith”. They let young people discover the cultural wealth and vision of Judaism and teach teenagers respect for the religious beliefs of the Jews. Thereby, they can contribute to the change of mentality of young participants of catechesis in their approach to Judaism. It is worth referring to the works of Jewish culture in these activities. It is the cultural heritage that comprises a great reference point to showing the strong Judaic roots of Christian culture. Thus, it is necessary, for the topics in Judaism proposed for religious syllabuses and catechetical material to be closely connected with organizing meetings of young Catholics with followers of the Mosaic religion. Only this kind of experience can contribute to an authentic inter-religious dialogue.
Microvascular Complications in Childhood-Onset Type 1 Diabetes and Celiac Disease: A Multicenter Longitudinal Analysis of 56,514 Patients From the German-Austrian DPV Database
Authors: Rohrer Tilman R. , Wolf Johannes , Liptay Susanne , Zimmer Klaus-Peter , Fröhlich-Reiterer Elke , Scheuing Nicole , Marg Wolfgang , Stern Martin , Kapellen Thomas M. , Hauffa Berthold P. , Wölfle Joachim , Holl Reinhard W. 
Published: February 2015

OBJECTIVE
To investigate whether celiac disease (CD) associated with type 1 diabetes increases the risk of microvascular complications.

RESEARCH DESIGN AND METHODS
Patients (n = 56,514) aged &gt;10 years with diabetes duration &lt;20 years from 392 centers in Germany and Austria were assigned to one of three categories (n): no CD (50,933), biopsy-confirmed CD (812), or suspected CD (4,769; clinical diagnosis or positive antibodies). The confirmed and suspected groups were combined and analyzed for retinopathy or nephropathy. Cox proportional hazards regression was used to adjust for potential confounders (glycated hemoglobin [HbA1c], age at diabetes onset, sex, smoking, dyslipidemia, and hypertension).

RESULTS
Kaplan-Meier analysis revealed that retinopathy and nephropathy occurred earlier in the presence versus absence of CD: retinopathy at age 26.7 years (95% CI 23.7–30.2) in 25% of patients with CD vs. age 33.7 years (33.2–34.4) in 25% without CD and microalbuminuria at age 32.8 years (29.7–42.5) vs. 42.4 years (41.4–43.3). The adjusted risk for both retinopathy (hazard ratio 1.263 [95% CI 1.078–1.481]) and nephropathy (1.359 [1.228–1.504]) was higher in patients with diabetes and CD versus those without CD. Cox regression revealed CD as an independent risk factor for microvascular complications after adjustment for confounders.

CONCLUSIONS
CD is an independent risk factor for retinopathy and nephropathy in patients with type 1 diabetes. Our study therefore supports the recommendation for regular serologic testing for CD, even in the absence of clinical CD. Further prospective studies are required to investigate whether a gluten-free diet might reduce the risk of microvascular disorders in patients with diabetes and CD.
Cognitive Behavioral Therapy Versus Sertraline in Patients With Depression and Poorly Controlled Diabetes: The Diabetes and Depression (DAD) Study
Authors: Petrak Frank , Herpertz Stephan , Albus Christian , Hermanns Norbert , Hiemke Christoph , Hiller Wolfgang , Kronfeld Kai , Kruse Johannes , Kulzer Bernd , Ruckes Christian , Zahn Daniela , Müller Matthias J. 
Published: February 2015

OBJECTIVEThis study compared the long-term efficacy of a diabetes-specific cognitive behavioral group therapy (CBT) with sertraline in patients with diabetes and depression who initially responded to short-term depression treatment.RESEARCH DESIGN AND METHODSA randomized controlled single-blind trial was conducted in 70 secondary care centers across Germany comparing 12 weeks of CBT with sertraline in 251 patients with type 1 or 2 diabetes (mean HbA1c 9.3%, 78 mmol/mol) and major depression (Structured Clinical Interview for DSM-IV [SCID]). After 12 weeks, treatment responders (≥50% reduction Hamilton Depression Rating Scale [HAMD-17]) were included in the 1-year study phase where CBT patients were encouraged to use bibliotherapy and sertraline patients received continuous treatment. We analyzed differences for HbA1c (primary outcome) and reduction (HAMD-17) or remission (SCID) of depression from baseline to the 1-year follow-up using ANCOVA or logistic regression analysis.RESULTSAfter 12 weeks, 45.8% of patients responded to antidepressant treatment and were included in the 1-year study phase. Adjusted HbA1c mean score changes from baseline to the end of the long-term phase (−0.27, 95% CI −0.62 to 0.08) revealed no significant difference between interventions. Depression improved in both groups, with a significant advantage for sertraline (HAMD-17 change: −2.59, 95% CI 1.15–4.04, P &lt; 0.05).CONCLUSIONSDepression improved under CBT and sertraline in patients with diabetes and depression, with a significant advantage for sertraline, but glycemic control remained unchanged. CBT and sertraline as single treatment are insufficient to treat secondary care diabetes patients with depression and poor glycemic control.
Release temperature, snow-cover entrainment and the thermal flow regime of snow avalanches
Authors: Valero Cesar Vera , Jones Katreen Wikstroem , Bühler Yves , Bartelt Perry 
Published: February 2015

AbstractTo demonstrate how snow-cover release and entrainment temperature influence avalanche runout we develop an avalanche dynamics model that accounts for the thermal heat energy of flowing snow. Temperature defines the mechanical properties of snow and therefore the avalanche flow regime. We show that the avalanche flow regime depends primarily on the temperature of the snow mass in the starting zone, as well as the density and temperature of the entrained snow cover, which define the influx of heat energy. Avalanche temperature, however, not only depends on the initial and boundary conditions, but also on the path-dependent frictional processes that increase internal heat energy. We account for two processes: (1) frictional shearing in the slope-parallel flow direction and (2) dissipation of random fluctuation energy by inelastic granular interactions. In avalanche flow, nonlinear irreversible processes are coupled with variable initial and boundary conditions that lead to transitions in flow regime. Snow avalanches thus exhibit a wide variety of flow behaviour with variation in snow-cover temperature.
Internal Mammary Sentinel Lymph Nodes in Breast Cancer - Effects on Disease Prognosis and Therapeutic Protocols - A Case Report
Authors: Stojanoski Sinisa , Ristevska Nevena , Pop-Gjorcheva Daniela , Antevski Borce , Petrushevska Gordana 
Published: February 2015

BACKGROUND: The main prognostic factor in early staged breast cancer is the axillary lymph node metastatic affection. Sentinel lymph node biopsy, as a staging modality, significantly decreases surgical morbidity. The status of internal mammary lymph nodes gains an increased predictive role in grading breast carcinomas and modulation of postoperative therapeutic protocols. If positive, almost always are associated with worse disease outcome. Nevertheless, the clinical significance of internal mammary lymph node micrometastases has not been up to date precisely defined.Â AIM: To present a case of female patient clinically diagnosed as T1, N0, M0 (clinical TNM) ductal breast carcinoma with scintigraphic detection of internal mammary and axillary sentinel lymph nodes.METHODS: Â Dual method of scintigraphic sentinel lymph node detection using 99mTc-SENTI-SCINT and blue dye injection, intraoperative gamma probe detection, radioguided surgery and intraoperative ex tempore biopsy were used.CASE REPORT: We present a case of clinically T1, N0, M0 ductal breast cancer with scintigraphic detection of internal mammary and axillary sentinel lymph nodes. Intraoperative ex tempore biopsy revealed micrometastases in the internal mammary node and no metastatic involvement of the axillary sentinel lymph node.CONCLUSION: Detection of internal mammary lymph node metastases improves N (nodal) grading of breast cancer by selecting a high risk subgroup of patients that require adjuvant hormone therapy, chemotherapy and/or radiotherapy.
Revenus du travail et emploi atypique, comparaison entre les analyses sociétales et individuelles
Authors: Ghesquière François , Wels Jacques 
Published: February 2015

L’objectif de cet article est de comparer la relation entre l’emploi atypique et les revenus du travail aux niveaux sociétal (macro) et individuel (micro). Les données des enquêtes européennes SILC et EFT sont utilisées pour comparer successivement ces deux approches. À partir d’une approche descriptive utilisant des corrélations (macro), nous montrons qu’il n’existe pas de lien entre emploi atypique et revenu du travail. Une forte proportion d’emplois atypiques par pays ne conduit pas à une augmentation (ou une diminution) des inégalités de revenu du travail au sein du pays. Inversement, au niveau micro, on observe dans la majorité des pays européens un lien fort et significatif entre emploi atypique et faiblesse du salaire : les emplois instables ou à temps partiel ont très souvent une faible rémunération. Par le biais d’une régression logistique réalisée pour trois pays (la France, les Pays-Bas et le Royaume-Uni), on met en évidence, non seulement les effets négatifs du travail à temps partiel et de l’emploi instable sur le revenu du travail, mais également l’impact du sexe, du niveau de formation et du secteur d’activité sur le risque d’occuper un emploi à faible revenu.
Líderes latinoamericanos en Twitter. Viejas costumbres para nuevos medios en tiempos de crisis políticas
Authors: Segado-Boj Francisco , Díaz-Campo Jesús , Lloves-Sobrado Beatriz 
Published: February 2015

Twitter representa un canal cada vez más importante para la comunicación política, aunque los estudios sobre su uso se han centrado casi exclusivamente en su empleo dentro de un marco cronológico marcado por las campañas electorales. Objetivos. Este artículo aborda el uso de esta herramienta como vehículo para la comunicación por parte de los principales políticos hispanoamericanos. Metodología. Se aplica un análisis de contenido a 688 mensajes publicados por diez políticos durante dos periodos de tiempo diferenciados, uno de ellos marcado por la atención mediática prestada a un escándalo político. Se aplican criterios de tipo de mensaje y direccionalidad del discurso. Resultados y conclusiones. Se concluye que no existe todavía una estrategia común de uso de Twitter en momentos de crisis por parte de los distintos líderes políticos latinoamericanos en el Gobierno y la oposición.
Data Collection Methods in Health Services Research
Authors: Bowles K.-A. , Skinner E.H. , Mitchell D. , Haas R. , Ho M. , Salter K. , May K. , Markham D. , O’Brien L. , Plumb S. , Haines T.P. , Sarkies M.N. 
Published: February 2015

SummaryBackground: Hospital length of stay and discharge destination are important outcome measures in evaluating effectiveness and efficiency of health services. Although hospital administrative data are readily used as a data collection source in health services research, no research has assessed this data collection method against other commonly used methods.Objective: Determine if administrative data from electronic patient management programs are an effective data collection method for key hospital outcome measures when compared with alternative hospital data collection methods.Method: Prospective observational study comparing the completeness of data capture and level of agreement between three data collection methods; manual data collection from ward-based sources, administrative data from an electronic patient management program (i.PM), and inpatient medical record review (gold standard) for hospital length of stay and discharge destination. Results: Manual data collection from ward-based sources captured only 376 (69%) of the 542 in-patient episodes captured from the hospital administrative electronic patient management program. Administrative data from the electronic patient management program had the highest levels of agreement with inpatient medical record review for both length of stay (93.4%) and discharge destination (91%) data.Conclusion: This is the first paper to demonstrate differences between data collection methods for hospital length of stay and discharge destination. Administrative data from an electronic patient management program showed the highest level of completeness of capture and level of agreement with the gold standard of inpatient medical record review for both length of stay and discharge destination, and therefore may be an acceptable data collection method for these measures.Citation: Sarkies MN, Bowles K-A, Skinner EH, Mitchell D, Haas R, Ho M, Salter K, May K, Markham D, O’Brien L, Plumb S, Haines T.P. Data collection methods in health services research – hospital length of stay and discharge destination. Appl Clin Inf 2015; 6: 96–109http://dx.doi.org/10.4338/ACI-2014-10-RA-0097