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  • Springer  (38)
  • American Chemical Society (ACS)  (1)
  • American Institute of Physics  (1)
  • American Institute of Physics (AIP)  (1)
  • 1
    Electronic Resource
    Electronic Resource
    A linear combination of Gaussian-type orbitals (LCGTO) Xα study of ferrocene: The metal-to-ring distance and ionization potentials (1986)
    College Park, Md. : American Institute of Physics (AIP)
    The Journal of Chemical Physics 84 (1986), S. 5967-5968 
    Details
    ISSN: 1089-7690
    Source: AIP Digital Archive
    Topics: Physics , Chemistry and Pharmacology
    Notes: The metal-to-ring distance of ferrocene, Fe(C5H5)2, has been optimized using the LCGTO-Xα method. The resulting distance is 0.047 A(ring) shorter than the experimental value of 1.65 A(ring). The corresponding symmetric stretching frequency of 331 cm−1 shows good agreement with experiment (303 cm−1). The two lowest (Fe 3d derived) ionization potentials are calculated almost degenerate but in reverse order compared to experiment (2A'1 below 2E2). The errors of all these results are discussed in the light of known inadequacies of the local density approximation.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.450854
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  • 2
    Electronic Resource
    Electronic Resource
    Characterization of strontium and barium manganates by abrasive stripping voltammetry (1998)
    Springer
    Journal of solid state electrochemistry 2 (1998), S. 413-419 
    Details
    ISSN: 1433-0768
    Keywords: Key words Abrasive stripping voltammetry ; X-ray powder diffractometry ; Manganates ; Solid state electrochemistry
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract Abrasive stripping voltammetry is applied in order to characterize barium and strontium manganates-(V) and -(VI) in solid state phases. Voltammetric reduction peak potential values of KBaMnO4, Ba3(MnO4)2, Ba3(MnO4)2− x (BO3) x (x=0.031(1)), Ba5(MnO4)3OH, Ba5(MnO4)3Cl, Sr5(MnO4)3OH and BaMnO4 are shown to be proportional to the corresponding average Mn-O distances, which were determined from X-ray powder diffractometric data through Rietveld refinement analyses.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s100080050119
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  • 3
    Electronic Resource
    Electronic Resource
    A note regarding the rate-determining step of reduction of solid manganates(V) (1999)
    Springer
    Journal of solid state electrochemistry 3 (1999), S. 117-120 
    Details
    ISSN: 1433-0768
    Keywords: Key words Electrochemistry ; Manganates(V) ; Mn oxides
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract Potential pulse chonoamperometry was applied to immobilized microparticles of manganates(V) and MnO2 in order to compare the nature of the rate determining step in their reduction. Manganates(V) were found to be reduced by an irreversible one-electron surface reaction, whereas MnO2 reduction is controlled by a reversible reaction coupled to solid-state diffusion. The key importance of the coordination preferences of reacting metal ions on the surface layer of the solid particles is also discussed with respect to known mechanisms of electrochemical dissolution of Fe and Cr oxides.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s100080050137
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  • 4
    Electronic Resource
    Electronic Resource
    Broadband holography applied to eddy current imaging by using signals with multiplied phases (1993)
    Springer
    Journal of nondestructive evaluation 12 (1993), S. 153-162 
    Details
    ISSN: 1573-4862
    Keywords: Nondestructive testing ; eddy current imaging ; broadband holography ; synthetic aperture imaging ; phase multiplication ; image reconstruction
    Source: Springer Online Journal Archives 1860-2000
    Topics: Electrical Engineering, Measurement and Control Technology , Mathematics
    Notes: Abstract In this paper an eddy current imaging method for nondestructive testing purposes is presented which utilizes the concept of broadband holography. An eddy current coil which is used simultaneously as an antenna for eddy current generation and as a probe for detection of response of interaction between eddy currents and flaws, respectively, is moved along a synthetic aperture during the imaging procedure generating synthetic eddy current pulses by scanning a certain frequency range. In terms of wave propagation phenomena the penetration depth (range) of eddy currents in conducting media is small compared to the equivalent wavelength of this type of fields. Therefore, adequate resolution can only be obtained in the reconstructed cross-sectional images by phase multiplication of received multifrequency signals, which is equivalent to a fictitious reduction of wavelengths. Experimental results verify the imaging capability of this method with improved resolution compared to conventional eddy current testing methods.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00567083
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  • 5
    Electronic Resource
    Electronic Resource
    Norepinephrine-induced phosphorylation of the transcription factor CREB in isolated rat pinealocytes: an immunocytochemical study (1995)
    Springer
    Cell & tissue research 282 (1995), S. 219-226 
    Details
    ISSN: 1432-0878
    Keywords: Key words: Pinealocytes ; Cyclic AMP responsive element binding protein (CREB) ; Phosphorylated CREB ; β-Adrenergic receptor ; S-antigen (arrestin) ; Transcription factors ; Cell culture (Rat ; Wistar)
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Abstract. In the present study we investigated whether norepinephrine, which stimulates melatonin biosynthesis in the mammalian pineal organ, causes phosphorylation of the cyclic AMP responsive element binding protein (CREB) in rat pinealocytes. Cells isolated from the pineal organ of adult male rats and cultured on coated coverslips were treated with norepinephrine, β- or α1-adrenergic agonists for 1, 5, 10, 20, 30, 60 or 300 min and then immunocytochemically analyzed with an antibody against phosphorylated CREB (p-CREB). Treatment with norepinephrine or β-adrenergic agonists resulted in a similar, time-dependent induction of p-CREB immunoreactivity, exclusively found in cell nuclei. The α1-adrenergic agonist phenylephrine did not induce p-CREB immunoreactivity at low doses (0.1 μM) or when high doses (10 μM) were applied in combination with a β-antagonist (propranolol, 0.1 μM). This indicates that induction of CREB phosphorylation is elicited by β-adrenergic receptor stimulation. The response was first seen after 10 min and reached a maximum after 30 to 60 min when more than 90% of the cells displayed p-CREB immunoreactivity. The intensity of the p-CREB immunoreactivity showed marked cell-to-cell variation, but nearly all immunoreactive cells were identified as pinealocytes by double-labeling with an antibody against the S-antigen, a pinealocyte-specific marker. The results show that norepinephrine stimulation induces p-CREB immunoreactivity by acting upon β-adrenergic receptors in virtually all rat pinealocytes. The findings support the notion that phosphorylation of CREB is a rather rapid and uniform response of pinealocytes to noradrenergic stimulation and thus is an important link between adrenoreceptor activation and subsequent gene expression in the rat pineal organ.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s004410050474
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  • 6
    Electronic Resource
    Electronic Resource
    Norepinephrine-induced phosphorylation of the transcription factor CREB in isolated rat pinealocytes: an immunocytochemical study (1995)
    Springer
    Cell & tissue research 282 (1995), S. 219-226 
    Details
    ISSN: 1432-0878
    Keywords: Pinealocytes ; Cyclic AMP responsive element binding protein (CREB) ; Phosphorylated CREB ; β-Adrenergic receptor ; S-antigen (arrestin) ; Transcription factors ; Cell culture (Rat, Wistar)
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Abstract In the present study we investigated whether norepinephrine, which stimulates melatonin biosynthesis in the mammalian pineal organ, causes phosphorylation of the cyclic AMP responsive element binding protein (CREB) in rat pinealocytes. Cells isolated from the pineal organ of adult male rats and cultured on coated coverslips were treated with norepinephrine, β- or α1 agonists for 1, 5, 10, 20, 30, 60 or 300 min and then immunocytochemically analyzed with an antibody against phosphorylated CREB (p-CREB). Treatment with norepinephrine or β-adrenergic agonists resulted in a similar, time-dependent induction of p-CREB immunoreactivity, exclusively found in cell nuclei. The α1 agonist phenylephrine did not induce p-CREB immunoreactivity at low doses (0.1 μM) or when high doses (10 μM) were applied in combination with a β-antagonist (propranolol, 0.1 μM). This indicates that induction of CREB phosphorylation is elicited by β-adrenergic receptor stimulation. The response was first seen after 10 min and reached a maximum after 30 to 60 min when more than 90% of the cells displayed p-CREB immunoreactivity. The intensity of the p-CREB immunoreactivity showed marked cell-to-cell variation, but nearly all immunoreactive cells were identified as pinealocytes by double-labeling with an antibody against the S-antigen, a pinealocyte-specific marker. The results show that norepinephrine stimulation induces p-CREB immunoreactivity by acting upon β-adrenergic receptors in virtually all rat pinealocytes. The findings support the notion that phosphorylation of CREB is a rather rapid and uniform response of pinealocytes to noradrenergic stimulation and thus is an important link between adrenoreceptor activation and subsequent gene expression in the rat pineal organ.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00319113
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  • 7
    Electronic Resource
    Electronic Resource
    Molekulargewichtsbestimmung (1933)
    Springer
    Fresenius' Zeitschrift für analytische Chemie 92 (1933), S. 193-200 
    Details
    ISSN: 1618-2650
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01359405
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  • 8
    Electronic Resource
    Electronic Resource
    Coding medical concepts:A controlled experiment with a computerised coding tool (1995)
    Springer
    Journal of clinical monitoring and computing 12 (1995), S. 141-145 
    Details
    ISSN: 1573-2614
    Keywords: coding medical concepts ; diagnoses ; electronic patient record ; ICD-9 ; quality of documentation
    Source: Springer Online Journal Archives 1860-2000
    Topics: Computer Science , Medicine
    Notes: Abstract In clinical routine there is a growing need to encode medical concepts with available standard coding systems. The coding process can be time consuming and may significantly add to daily paperwork, particularly regarding patients with multiple diagnoses and in busy clinical environments with a high turnover of patients. We have developed a generic computerised encoding tool — the PADS encoder — to ensure rapid, correct and complete coding of diagnoses in daily routine. The tool is integrated into an electronic patient record system (PADS, Patient Archiving & Documentation System) and takes full advantage of the user friendly Macintosh interface. The tool was tested in a controlled experiment by 18 clinicians who encoded a total of 666 medical concepts in each protocol (study protocol vs. control). The following positive findings were significantly associated with the use of the computerised coding tool: - the number of correctly encoded medical concepts was higher (99.55% vs. 86.1%) - coding errors were lower (0% vs. 10.81%) - more modifier codes were encoded correctly (increase by up to 43%) - less coding errors were made (decrease by up to 43%) - the overall rate of correctly encoded and complete main and modifier codes was increased by 31.27% (97.29% vs. 66.02%) - coding time was reduced by 50% This paper presents data to suggest that a computerised coding tool can produce more complete data of higher quality and can save time compared with the traditional approach to encode medical concepts.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02332688
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  • 9
    Electronic Resource
    Electronic Resource
    PADS (Patient Archiving and Documentation System): A computerized patient record with educational aspects (1992)
    Springer
    Journal of clinical monitoring and computing 9 (1992), S. 71-84 
    Details
    ISSN: 1573-2614
    Keywords: Computerized Patient Record ; Medical Record ; patient documentation ; Macintosh ; ORACLE ; 4th dimension ; local are network (LAN) ; Intensive Care Unit (ICU) ; graphical user interface (GUI) ; relational database management system (RDBMS) ; personal computer (PC)
    Source: Springer Online Journal Archives 1860-2000
    Topics: Computer Science , Medicine
    Notes: Summary Rapid acquisition and analysis of information in an Intensive Care Unit (ICU) setting is essential, even more so the documentation of the decision making process which has vital consequences for the lifes of ICU patients. We describe an Ethernet based local area network (LAN) with clinical workstations (Macintosh fx, ci). Our Patient Archiving and Documentation System (PADS) represents a computerized patient record presently used in a university hospitals' ICU. Taking full advantage of the Macintosh based graphical user interface (GUI) our system enables nurses and doctors to perform the following tasks: admission, medical history taking, physical examination, generation of problem lists and follow up notes, access to laboratory data and reports, semiautomatic generation of a discharge summary including full word processor capabilities. Furthermore, the system offers rapid, consistent and complete automatic encoding of diagnoses following the International Classification of Disease (ICD; WHO, [1]). For educational purposes the user can also view disease entities or complications related to the diagnoses she/he encoded. The system has links to other educational programs such as cardiac auscultation. A MEDLINE literature search through a CD-ROM based system can be performed without exiting the system; also, CD-ROM based medical textbooks can be accessed as well. Commercially available Macintosh programs can be integrated in the system without exiting the main program thus enabling users to customize their working enviroment. Additional options include automatic background monitoring of users learning behavior, analyses and graphical display of numerous epidemiological and health care related problems. Furthermore, we are in the process of integrating sound and digital video in our system. This system represents one in a line of modular departmental models which will eventually be integrated to form a decentralized Hospital Information System (HIS).
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01142184
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  • 10
    Electronic Resource
    Electronic Resource
    Data quality in computerized patient records (1994)
    Springer
    Journal of clinical monitoring and computing 11 (1994), S. 233-240 
    Details
    ISSN: 1573-2614
    Keywords: computerized patient record ; computerized medical record ; haematology ; cytology database ; electronic data quality ; free text coding
    Source: Springer Online Journal Archives 1860-2000
    Topics: Computer Science , Medicine
    Notes: Abstract This paper addresses the problem of data quality in electronic patient records using a computerized haematology biopsy report system as an example. Physicians extracted five parameters from a traditional free text cytology report and encoded these parameters thus producing a computer processable report. The parameters were 1) the organ biopsied, 2) quality of specimen, 3) cytological diagnosis including 4) a modifier code for the main diagnosis code (i.e. status post chemotherapy, Y-code) and 5) an additional key describing the degree of remission obtained after chemotherapy of acute leukemias. From the various steps involved in generating the electronic record we selected two critical ones: - encoding of free text terms by physician staff - entering of the coded terms into a computer by lab staff. We analyzed the rates of correct, incorrect and missing codes for each of the five parameters. Our findings indicate that in this model of an electronic patient record 1) there is significant inaccuracy of physicians during the process of encoding the free text report with error rates between 3.2 and 28% and omission rates up to 64%. 2) lab staff entering these coded data into the computer introduce additional errors (0–7.8%) but rarely miss correctly encoded data (0–0.9%). 3) introducing a revised coding system data quality improved significantly (p≤0.001) with a fivefold increase of correct and a 75% reduction of missing codes. 4) the clinical relevance of the diagnoses encoded as perceived by clinicians is a significant factor affecting error and omission rates. 5) a significant source of error is the machine/user interface resulting in incorrect data entry of up to 91.7%. 6) when considering all combined errors and omissions in coding and in entering these codes into a computer only 43% of all electronic reports examined were correct and complete. We conclude that the quality of data in electronic patient records can be quite low. Amongst significant factors contributing to low electronic data quality are the type of user interacting with the system, the kind of function the user performs, relevance of codable terms as perceived by physicians, the kind of coding system used and the quality of the human/machine-interface.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01139875
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