bluuebunny/crossref_metadata_2025_split huggingface dataset:
Die Eigenschaften von Kupfer‐Palladium‐und Kupfer‐Platinlegierungen als Katalysatoren der Äthylenhydrierung. (Katalytische Untersuchungen an Legierungen, XI)
Authors: Rienäcker G. , Müller E. , Burmann R. 
Published: January 2005

AbstractDie Geschwindigkeit der katalytischen Äthylenhydrierung wird nach der Strömungsmethode an kompakten Kupfer‐Palladium‐ und Kupfer‐Platinlegierungen (Mischkristallen) gemessen. Die Wirksamkeit vieler Legierungen übersteigt die Additivität beträchtlich, es liegen ausgesprochene „Verstärkungen”︁ vor. Palladium‐ und Kupfer‐Palladiumlegierungen bis herab zu 47 Atom‐% Pd, ferner Platin und Kupfer‐Platinlegierungen bis herab zu 16 Atom‐% Pt sind etwa gleich wirksam und hydrieren schon bei etwa 100°C. Kupfer und die kupferreichen Legierungen sind sehr wenig aktiv, sie katalysieren erst bei hohen Temperaturen. Zwischen beiden Katalysatorgruppen besteht ein Aktivitätsunterschied von rund 6 Größenordnungen. Diese Wirksamkeitsänderung innerhalb der Legierungsreihen weist auf Besonderheiten im Zustand der Legierungen hin und wird im Zusammenhang mit früheren Ergebnissen besprochen.
Zur Chemie des Meerwassers. Neuere Untersuchungen über die gelösten Gase
Authors: Wattenberg H. 
Published: January 2005

AbstractEs wird über die Bestimmungsmethoden der atmosphärischen Gase in Meerwasser berichtet, ferner über neuere Löslichkeitsbestimmungen von Stickstoff und Argon. Der Einfluß der besonderen physikalischen Verhältnisse in den großen Meerestiefen auf das Kohlensäuresystem wird diskutiert und schließlich eine kurze Übersicht über die Verteilung der atmosphärischen Gase in den Tiefen des Weltmeeres und ihre Ursachen gegeben.
Eine Bestimmungsmethode für Sauerstoff in anorganischen Verbindungen
Authors: v. Wartenberg H. 
Published: January 2005

Abstract1. In einem strömenden Schwefeldampf–Stickstoffgemisch setzt sich Zinkoxyd bei ∼ 1000° im Laufe 1 Stunde quantitativ zu ZnS und SO2 um. Aus der titrimetrisch bequem erfaßbaren SO2‐Menge läßt sich die vorhandene Oxydmenge mit großer Genauigkeit ermitteln.
Zur Kenntnis der Borsäuren und borsauren Alkalisalze XI: Das System NaBO2H2O
Authors: Menzel Heinrich , Schulz Hans 
Published: January 2005

Abstract1. Auf Grund des Zustandsdiagramms des Systems Na2OB2O3 H2O wurden sichere Darstellungsverfahren des Natriummonoborat‐4‐Hydrates sowohl aus reiner wie aus überschüssig alkalischer Lösung ausgearbeitet. Hierbei wurden verschiedene Eigentümlichkeiten des kristallisierten Tetrahydrates beobachtet. Die Dichte ϱ25° beträgt 1,743 ± 0,003.
Zur Kenntnis des Systems Nickel/Stickstoff. Metallamide und Metallnitride, 12. Mitt.
Authors: Juza Robert , Sachsze Werner 
Published: January 2005

Abstract1. Aus feinteiligem Nickelmetall oder Nickelhalogeniden wurde in strömendem Ammoniak bei 445 bzw. 410°C die Verbindung Ni3N erhalten. Chemisches Verhalten und thermische Beständigkeit der Verbindung werden angegeben.
Das Element 93 und seine Stellung im periodischen System
Authors: Starke Kurt 
Published: January 2005

AbstractDie bisher bekannten Eigenschaften des Elements 93 und der vor ihm stehenden Elemente Uran und Thorium ergeben, wenn man das Verhalten der Lanthaniden zum Vergleich heranzieht, trotz auffallender chemischer Ähnlichkeit in der vierwertigen Oxydationsstufe nicht die Notwendigkeit der Aufstellung einer Thoridengruppe. Dagegen besteht eine gewisse Berechtigung für die Einordnung des Elements 93 in eine Uranidengruppe. Die bestehende Unsicherheit hinsichtlich der Einordnung der genannten Elemente in das periodische System erscheint nicht nur durch noch fehlendes experimentelles Material bedingt, sondern auch prinzipiell begründet.
Über die Systeme AlkalioxydCaOAl2O3SiO2CO2. XI. Die Reaktionsdrucke im System K2OCaOSiO2CO2
Authors: Kröger C. , Illner K. W. , Graeser W. 
Published: January 2005

AbstractDas Schmelzdiagramm des Systems K2CO3CaCO3 wurde vervollständigt und die Dissoziationsdrucke der beiden vorliegenden Doppelcarbonate K2Ca(CO3)2 und K2Ca2(CO3)3 bestimmt.
Komplexverbindungen und Salze der Äthylendiamintetraessigsäure
Authors: Brintzinger H. , Thiele H. , Müller Ursula 
Published: January 2005

AbstractBlei(II)‐ion gibt mit Äthylendiamintetraessigsäure ein Salz, in welchem die 4 Carboxylgruppen der Säure durch 2 Bleiionen gebunden sind.
Über die Beständigkeit des Uranpentachlorids
Authors: Martin Hans , Eldau K. H. 
Published: January 2005

AbstractFestes Uranpentachlorid ist eine in reinem Zustande unbeständige Verbindung. Die Verbindung spaltet bereits bei Zimmertemperatur mit meßbarer Geschwindigkeit Chlor ab. In einer Stickstoffatmosphäre beträgt der Gleichgewichtspartialdruck des Chlors bei 20° C mindestens 10−2, bei 65° C mindestens 10−1 mm Hg. Die tatsächlichen Zersetzungsdrucke können beträchtlich größer sein.
Komplexverbindungen des Kupfer(II)‐azids. I Die Einlagerungsverbindungen
Authors: Straumanis M. , Cīrulis A. 
Published: January 2005

AbstractEs konnten nur 4 Einlagerungsverbindungen des Cu(N3)2 mit Aminen, in denen das Amin 4 Koordinationsstellen des Kupfers einnimmt, dargestellt werden: [Cu (NH3)4](N3)2, [Cu (CH3NH2)4](N3)2, [Cu(en)2](N3)2 und [Cu(pn)2](N3)2; die Existenz des Äthanolaminkomplexes
equation image
wurde wahrscheinlich gemacht. Die komplexbildende Fähigkeit des Cu‥ wird hier offensichtlich durch die Größe der Liganden bestimmt: während noch 4 Moleküle NH3 oder CH3NH2 durch das Zentralion gebunden werden können, genügt der dieses Ion umgebende Raum nicht mehr zur Anlagerung der größeren Moleküle des Äthylamins, Dimethylamins usw.Die erhaltenen Verbindungen lösen sich in Wasser oder in der Lösung des entsprechenden Amins mit blauvioletter Farbe und leiten den elektrischen Strom gut. Die Eigenschaften der Verbindungen werden beschrieben.
Über das Verhalten des Systems Al2O3/SO2/H2O bei tieferen Temperaturen und über ein neues kristallisiertes Aluminiumsulfit
Authors: Fischer Werner , Burger Eberhard 
Published: January 2005

AbstractIm wasserreichen Teil des Systems Al2O3/SO2/H2O kristallisieren beim Abkühlen Eis bzw. SO2‐Hydrat aus; das von beiden Stoffen gebildete Eutektikum erstreckt sich weit in das ternäre System hinein. Konzentriert man Aluminiumsulfitlösungen bei Raumtemperatur, z. B. durch Eindunsten über P2O5 im SO2‐Strom, so kristallisiert ein — formal „neutrales”︁ — Sulfit der Formel Al2O3·3SO2·xH2O aus. Einige Eigenschaften der neuen Verbindung werden beschrieben und ihre Bildungsbedingungen untersucht.
Eigenschaften, Verbrennungswärme und Beständigkeit von Eisen(II)‐hydroxyd
Authors: Fricke R. , Rihl S. 
Published: January 2005

Abstract1. Unter vollkommenem Ausschluß von Luftsauerstoff bei weitgehender Abwesenheit von Fe(II)‐ionen hergestelltes Fe(OH)2 ist zuerst rein weiß, wird aber bei längerem Lagern unter sauerstofffreiem Wasser ganz leicht grünstichig. Die unter vollkommenem Sauerstoffausschluß durchgeführte Analyse erwies dann einen unter 0,5% liegenden Gehalt an Fe(III).
Challenges and opportunities of a transactional world view: Case study of contemporary Mormon polygynous families
Authors: Altman Irwin 
Published: January 2005

AbstractSummarized an ongoing research program on contemporary Mormon polygynous families. Husband‐wife and wife‐wife relations in plural families are examined from dialectical and transactional world views. Key research issues center on (a) how husbands and wives achieve viable dyadic and communal relationships, and (b) how dyadic and communal issues are managed in social and physical contexts through the life cycle of plural family relationships.
Charting the process of change: A primer on survival analysis
Authors: Luke Douglas A. 
Published: January 2005

AbstractSurvival analysis is a powerful and useful technique for understanding qualitative change. This article provides a practical, nontechnical introduction to the use of survival analysis for social scientists. Important issues in using survival analysis are discussed, including research design, data preparation and management, and data analysis. Attendance data from a self‐helf organization are used to illustrate common survival analysis tasks such as describing the overall survival and hazard functions, examining covariate effects, and modeling the form of the hazard function over time. An appendix that discusses the strengths and weaknesses of current survival analysis computer programs is included.
The social context of Hong Kong's booming elderly home industry
Authors: Cheng Sheung-Tak 
Published: January 2005

AbstractHong Kong experienced a rapid increase in private homes for elderly people in recent years. This paper examines the social background of that development. Private elderly homes thrived in a context of rising demand due to changing demographics, particularly massive emigration secondary to political instability, which created a large potential market of elderly people in need of residential care. However, entrepreneurs would not be attracted unless it is a profitable business, and much of that profit is likely derived from social security payments to elderly people. Because the amount of social security benefits is way below the level required for purchasing good quality service in the private sector, many elderly people are bound to live in very poor residential settings.
The resident researcher: An alternative career model centered on community
Authors: Wicker Allan W. , Sommer Robert 
Published: January 2005

AbstractConsiders the potential benefits and costs of an alternative career model for community researchers, one in which professionals specialize in the community where they live. By virtue of their local familiarity, resident researchers can make more informed judgments about research problems and methods. They can employ longitudinal designs to assess change and be available to assist in interpretation and implementation of research. Potential costs include the possibility of provincialism, unintended researcher effects, ethical dilemmas, the need to cultivate community relations, and role conflicts. Interdisciplinary training programs and research field stations can contribute to the development of the resident researcher role. Researchers in the community can help generate grass roots support for social science research.
The social construction and subjective reality of activity settings: Implications for community psychology
Authors: Gallimore Ronald , Goldenberg Claude N. , Weisner Thomas S. 
Published: January 2005

AbstractA major focus of the article is the idea that activity settings are in part social constructions of the participants. The socially constructed “meaning” of an activity setting is a complex mix of ecological, cultural, interactional, and psychological features. These features may be observed and assessed, directly and indirectly, in terms of personnel, cultural values, tasks, scripts for conduct, and motives and purposes of actors. Empirical illustrations and extensions to community psychology are drawn from research with different populations: Native Hawaiian children and families, Spanish‐speaking children and Mexican and Central American immigrant parents, Euro‐American families with a developmentally delayed child, and Euro‐American families who intentionally adopted nonconventional child‐rearing values and practices.
Cultural phenomena and the research enterprise: Toward a culturally anchored methodology
Authors: Hughes Diane , Seidman Edward , Williams Nathaniel 
Published: January 2005

AbstractHighlights the points at which culture intersects major phases of the research enterprise — problem formulation, population definition, concept and measurement development, research design, methodology, and data analysis — and influences and constrains what researchers deem worthy of investigation and how they interpret what they observe. These ethnocentric biases inhibit the development of a knowledge base for understanding diverse cultural communities. At each step of the research process, the need to carefully examine and expose the underlying cultural assumptions and to generate and develop alternative choices is emphasized. Guidelines are provided to encourage researchers to be aware of and deliberately make choices toward the development of a culturally anchored methodology that balances the demands for rigor and sensitivity.
Toward a culturally anchored ecological framework of research in ethnic‐cultural communities
Authors: Sasao Toshiaki , Sue Stanley 
Published: January 2005

AbstractProposed a research framework (the “cube” model) in which community psychologists working in ethnic‐cultural communities can make appropriate decisions on conceptual and methodological issues from a culturally anchored, ecological‐contextualist perspective. The intent of the model is to articulate ethnic‐cultural heterogeneity in community research by elucidating three metamethodological issues: (a) definition of an ethnic‐cultural community, (b) applicability of cross‐cultural theories and methods to ethnic‐cultural community research, and (c) geographical or ecological stability of an ethnic‐cultural community. The model posits that ethnic‐cultural community research can be conceptualized as a three‐dimensional structure that represents an interaction among research questions, methods, and cultural complexity (referring to the extent to which an ethnic‐cultural group is defined in a larger ecological context or community both at the individual and collective levels). Future directions for research were discussed in terms of the utility and the limitations of the proposed research model.
Let's hang up and try again: Lessons learned from a social support intervention
Authors: Vaux Alan 
Published: January 2005

ConclusionTheorists and researchers have spent some 15 years trying to better understand social support. A great deal of progress has been made in the assessment of support resources, behavior, and appraisals, in conceptualizing the support process, and in understanding how support might influence well‐being. Community psychologists, in particular, have sought this knowledge as a basis for social intervention. The point has been reached where research and theory, though still incomplete, can inform intervention. Indeed, intervention programs are likely to make a unique contribution to our understanding.Yet, if anything has been learned, it is that the social support process is far more complex than initially thought, as is its relationship to well‐being. It is essential that support interventions reflect that complexity. The greatest threat is not that powerful and effective support interventions will prove impossible to develop and implement, but that we may become disillusioned by misunderstanding our failures.
Ethical issues in genetic counseling: A comparison of M.S. counselor and medical geneticist perspectives
Authors: Pencarinha Deborah F. , Bell Nora K. , Edwards Janice G. , Best Robert G. 
Published: January 2005

AbstractNew technologies available in the field of medical genetics have increased the importance of responsible ethical decision‐making among genetic counselors. A 1985 national survey of M.D. and Ph.D. genetic counselors assessed ethical attitudes using case scenarios designed to simulate dilemmas faced in genetic counseling (Wertz and Fletcher, 1988b). The current study focuses on attitudes of M.S. genetic counselors using similar scenarios, allowing for effective comparisons. M.S. counselors were more willing than M.D. and Ph.D. counselors to maintain patient confidentiality when screening for Huntington's Disease and occupational diseases, and a greater number would agree to counsel patients pursuing prenatal testing for sex selection. A majority of M.S. counselors would disclose an XY karyotype to a phenotypically female patient. M.S. counselors reasoned that respect for patient autonomy and patient confidentiality justified their decisions in many cases. The importance of these principles is discussed and questioned.
An explication of the National Society of Genetic Counselors (NSGC) code of ethics
Authors: Benkendorf Judith L. , Callanan Nancy P. , Grobstein Rose , Schmerler Susan , FitzGerald Kevin T. 
Published: January 2005

AbstractThis article reviews the work carried out by the NSGC ad hoc Committee on Ethical Codes and Principles between 1986 and 1991 and serves as a guide for interpreting the NSGC Code of Ethics. The NSGC Code of Ethics is written from the “ethic of care” perspective. It is based on the responsibilities that arise from the four primary relationships genetic counselors experience in their work: genetic counselors and themselves, their clients, their colleagues, and society. The values selected for each relationship and the resultant guidelines are explained. The Code of Ethics became effective January 1, 1992.
Seeing the baby: The impact of ultrasound technology
Authors: Beck Black Rita 
Published: January 2005

AbstractThis paper reports results of a study of prenatal diagnosis patients who underwent ultrasound examinations and lost their pregnancies through miscarriage or elective terminations. The majority of the women felt that viewing the ultrasound image influenced their relationship to the fetus and their coping with the pregnancy loss. The women commented on the power of ultrasound to make their pregnancies more real as well as the painful yet sometimes beneficial consequences of seeing the fetus. Clinical implications are considered for health professionals who provide prenatal diagnostic services or counseling after pregnancy loss.
Harlequin Ichthyosis among the Navajo: Counseling issues
Authors: Olney Patricia N. , Olney Richard S. 
Published: January 2005

AbstractHarlequin Ichthyosis is a rare, fatal congenital disorder of keratinization characterized by thickened, scale‐like plaques of skin with a diamond configuration. Autosomal recessive inheritance has been established, and prenatal diagnosis for this disorder remains controversial. Five infants with this disorder were born among approximately 25,000 Navajo women who delivered in Gallup, New Mexico from 1970 to 1989. The incidence of 1 in 5000 among the Navajo in Gallup is high compared to previous reports in other populations. Two families with affected infants were seen in a genetics outreach clinic. Two important counseling issues were raised: (1) reluctance to discuss the possibility of recurrence for fear of affecting the outcome, and (2) feelings of guilt caused by cultural beliefs which attributed the birth defect to paternal behavior during pregnancy. Such issues are encountered in many traditional cultures, and they can be addressed by tailoring the timing and content of counseling.
Research on familial Creutzfeldt‐Jakob disease (FCJD) resulting in presymptomatic testing: Implications for the human genome project
Authors: Ulm Janet E. , Vnencak‐Jones Cindy L. , Bosque Patrick 
Published: January 2005

AbstractA research study to identify the priori gene mutation in a family with familial Creutzfeldt‐Jakob disease (FCJD) evolved into presymptomatic diagnostic testing. Our experience with one case raises concerns regarding similar studies that will ensue as a result of the Human Genome Project. Technological advances in human molecular genetics make it difficult for Institutional Review Boards (IRB) to adequately evaluate proposed studies. Additionally, changes in the implications of the study may occur after initial IRB approval, due to technological progress. While FCJD, like Huntington's disease (HD), has adult onset and causes progressive dementia and ataxia, protocols established for presymptomatic testing of HD were not included in the FCJD study design. It is thus recommended that IRB committees include a genetics professional and that IRB‐approved research studies be reevaluated on a regular basis to monitor the impact that technological advances may have on participating human subjects.
A project to strengthen linkages between genetic centers and child welfare services
Authors: Rauch Julia B. , Plumridge Diane 
Published: January 2005

AbstractGenetic centers are reaching out to underserved populations. One of the most vulnerable underserved populations is children receiving child welfare services. Delivering genetic services to this group is particularly problematic because of multiple barriers. The first step in overcoming barriers is developing linkages between the genetic and adoption service systems with the goal of increasing referrals of child welfare clients to genetic services. This paper presents a model of fostering linkages that was developed under the auspices of the Mid‐Atlantic Regional Human Genetics Network with support from the Maternal and Child Health Bureau, Genetic Services Branch. Although the project was regional and funded, the model can be applied at the local level.
Suspected toxoplasma—Associated myocarditis in a cat
Authors: Simpson Kerry E , Devine B Craig , Gunn-Moore Danièlle 
Published: January 2005

Clinical toxoplasmosis is commonly reported in the cat, with the most consistent findings being ocular, pulmonic, hepatic, neurological, gastrointestinal and muscular abnormalities. Myocarditis, whilst frequently identified at post-mortem examination, has not been identified ante-mortem. In immunocompromised humans, myocarditis associated with toxoplasmosis is not an uncommon complication. In such cases, lymphocytic myocardial infiltration can lead to depressed myocardial function, which can be associated with congestive heart failure, rhythm disturbances and pericardial effusions. In addition, myocardial failure has been reported in immunocompetent humans associated with active toxoplasmosis [ Chandenier J, Jarry G, Nassif D, Douadi Y, Paris L, Thulliez P, Bourges-Petit E, Raccurt C (2000) Congestive heart failure and myocarditis after seroconversion for toxoplasmosis in two immunocompetent patients. European Journal of Clinical Microbiological Infectious Disease19, 375–379 ]. Here we describe a cat with echocardiographic changes consistent with infiltrative or inflammatory disease, and elevated IgG and IgM titres to Toxoplasma gondii. There was resolution of these myocardial changes once the toxoplasmosis was treated.
Hepatitis A virus proteinase 3C binding to viral RNA: correlation with substrate binding and enzyme dimerization
Authors: PETERS Hannelore , KUSOV Yuri Y. , MEYER Sonja , BENIE Andrew J. , BÄUML Englbert , WOLFF Maike , RADEMACHER Christoph , PETERS Thomas , GAUSS-MÜLLER Verena 
Published: January 2005

Proteinase 3C of hepatitis A virus (HAV) plays a key role in the viral life cycle by generating mature viral proteins from the precursor polyprotein. In addition to its proteolytic activity, 3C binds to viral RNA, and thus influences viral genome replication. In order to investigate the interplay between proteolytic activity and RNA binding at the molecular level, we subjected HAV 3C and three variants carrying mutations of the cysteine residues [C24S (Cys-24→Ser), C172A and C24S/C172A] to proteolysis assays with peptide substrates, and to surface plasmon resonance binding studies with peptides and viral RNA. We report that the enzyme readily forms dimers via disulphide bridges involving Cys-24. Dissociation constants (KD) for peptides were in the millimolar range. The binding kinetics for the peptides were characterized by kon and koff values of the order of 102 M−1·s−1 and 10−2 to 10−1 s−1 respectively. In contrast, 3C binding to immobilized viral RNA, representing the structure of the 5′-terminal domain, followed fast binding kinetics with kon and koff values beyond the limits of the kinetic resolution of the technique. The affinity of viral RNA depended strongly on the dimerization status of 3C. Whereas monomeric 3C bound to the viral RNA with a KD in the millimolar range, dimeric 3C had a significantly increased binding affinity with KD values in the micromolar range. A model of the 3C dimer suggests that spatial proximity of the presumed RNA-binding motifs KFRDI is possible. 3C binding to RNA was also promoted in the presence of substrate peptides, indicating co-operativity between RNA binding and protease activity. The data imply that the dual functions of 3C are mutually dependent, and regulate protein and RNA synthesis during the viral life cycle.