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  • 11
    facet.materialart.
    Unknown
    Philadelphia, etc. : Periodicals Archive Online (PAO)
    Current History. 42:249 (1962:May) 257 
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  • 12
    facet.materialart.
    Unknown
    Philadelphia, etc. : Periodicals Archive Online (PAO)
    Current History. 45:266 (1963:Oct.) 193 
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  • 13
    Electronic Resource
    Electronic Resource
    Chester : International Union of Crystallography (IUCr)
    Journal of synchrotron radiation 8 (2001), S. 695-697 
    ISSN: 1600-5775
    Source: Crystallography Journals Online : IUCR Backfile Archive 1948-2001
    Topics: Geosciences , Physics
    Notes: Single crystal X-ray diffraction measurements are complicated in the presence of heavy atoms. In these cases the structure factors are mainly influenced by the heavy scatterers and the error in determination of atomic coordinates increases for light atoms. The difficulties grow if the unit cell dimensions or the space group symmetry remain uncertain. If the structure model is similar to the correct structure, it is difficult to find an independent criterion for the accuracy of the bond-length determination. We demonstrate that extended X-ray absorption fine structure (EXAFS) spectroscopy is a useful tool for the investigation of local bond lengths in the environment of heavy atoms.
    Type of Medium: Electronic Resource
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  • 14
    Electronic Resource
    Electronic Resource
    Chester : International Union of Crystallography (IUCr)
    Journal of synchrotron radiation 6 (1999), S. 1076-1085 
    ISSN: 1600-5775
    Source: Crystallography Journals Online : IUCR Backfile Archive 1948-2001
    Topics: Geosciences , Physics
    Notes: The paper describes the Rossendorf beamline (ROBL) built by the Forschungszentrum Rossendorf at the ESRF. ROBL comprises two different and independently operating experimental stations: a radiochemistry laboratory for X-ray absorption spectroscopy of non-sealed radioactive samples and a general purpose materials research station for X-ray diffraction and reflectometry mainly of thin films and interfaces modified by ion beam techniques.
    Type of Medium: Electronic Resource
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  • 15
    ISSN: 1433-0385
    Keywords: Key words: Renal hyperparathyroidism ; Operative therapy ; Prospective follow-up study. ; Schlüsselwörter: Renaler Hyperparathyreoidismus ; operative Therapie ; prospektive Beobachtungsstudie.
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Zusammenfassung. In einer prospektiven Beobachtungsstudie bei Patienten mit renalem Hyperparathyreoidismus wurden nach Eingriffen an den Nebenschilddrüsen der Verlauf und die Abhängigkeit der Symptomatik von präoperativ ermittelten Laborparametern analysiert. Zwischen dem 1. 8. 1987 und dem 31. 12. 1995 wurden 79 Patienten operiert. Bei 72 Patienten erfolgten erstmalige Eingriffe an den Nebenschilddrüsen. Bevorzugtes Operationsverfahren war die totale Parathyreoidektomie mit autologer Epithelkörperchenreplantation (n = 67). Informationen zum postoperativen Verlauf liegen von allen Patienten vor. Bei 74 der 79 Patienten erfolgten regelmäßige Nachuntersuchungen (1–9, Median = 4) mit einer Nachbeobachtungszeit von 1–60 Monaten (Median 18 Monate). Das Ausmaß der postoperativen Hypocalciämie, die bei 84,8 % aller Patienten auftrat, war negativ mit der Höhe der präoperativen Serumkonzentrationen der alkalischen Phosphatase sowie des intakten Parathormons korreliert. Juckreiz klang postoperativ bei über 60 % der betroffenen Patienten innerhalb von 4 Wochen ab, während sich das ossäre Syndrom längerfristig zurückbildete. Ein Jahr postoperativ war der Juckreiz in 75 % und das ossäre Syndrom in 79 % der Fälle abgeklungen. In der Patientengruppe nach totaler Parathyreoidektomie mit simultaner Epithelkörperchenreplantation waren Gelenkschmerzen bei präoperativ erhöhten Spiegeln der alkalischen Phosphatase (〉 200 U/l) rascher rückläufig als bei normalen Spiegeln (p = 0,0297). Die Rezidivrate nach totaler Parathyreoidektomie und Autotransplantation beträgt 4,5 %. Patienteneigene Faktoren beeinflussen die Morbidität des Eingriffs wegen eines renalen Hyperparathyreoidismus. Die postoperative Hypocalciämie korreliert negativ mit dem Grad der zum Operationszeitpunkt vorliegenden renalen Osteopathie. Die Höhe der präoperativen Konzentration der alkalischen Phosphatase beeinflußt den zeitlichen Verlauf der postoperativen Rückbildung von Gelenkschmerzen.
    Notes: Summary. A prospective long-term follow-up study in patients who had had surgical therapy for renal hyperparathyroidism was launched to investigate the results of surgical treatment and to evaluate possible correlations between preoperative laboratory values and the course of the symptoms. From August 1987 to December 1995, 79 patients underwent surgery for renal hyperparathyroidism. It was the first neck exploration for 72 patients. Total parathyroidectomy with autotransplantation to a forearm was our preferred procedure (n = 67). The postoperative course of all patients is known. We carried out one to nine reexaminations (median 4) in 74 of 79 patients. The follow-up period ranged from 1 month to 5 years with a median of 18 months. After the operation transient hypocalcaemia occurred in 84.8 % of patients. Postoperative hypocalcaemia correlated negatively with the preoperative levels of alkaline phosphatase and intact parathyroid hormone. Within the first month after surgery 60 % of the preoperatively affected patients completely recovered from pruritus, whereas the skeletal syndrome took longer to disappear. One year after surgery 75 % of the patients with pruritus and 79 % of those with skeletal syndrome had became asymptomatic. After total parathyroidectomy with autotransplantation, patients with preoperatively elevated concentrations of alkaline phosphatase ( 〉 200 U/l) experienced faster relief from joint pain than patients with preoperatively normal concentrations (P = 0.0297). To date 4.5 % of the patients developed recurrent hyperparathyroidism after total parathyroidectomy with autotransplantation. Morbidity of surgery for renal hyperparathyroidism is influenced by patients' risk factors. Postoperative hypocalcaemia correlates negatively with the grade of renal osteopathy at the time of operation. Preoperative concentrations of alkaline phosphatase influence the rapidity of the relief from joint pain.
    Type of Medium: Electronic Resource
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  • 16
    Electronic Resource
    Electronic Resource
    Springer
    Pharmaceutical research 13 (1996), S. 32-37 
    ISSN: 1573-904X
    Keywords: albumin ; nanospheres ; manufacturing ; glutaraldehyde ; cross-linking ; central composite design
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract Purpose. The purpose of this study was to develop a new method to produce albumin particles in the sub-200-nanometer range with a narrow size distribution and in a controlled and reproducible manner. Methods. A new emulsion crosslinking method was developed using ultrasound and static mixing as homogenization steps and a central composite design was used to evaluate the influence of different process parameters on particle size, polydispersity and yield. Results. Response surface analysis allowed the location of the most important factors. Of all the factors investigated, only the albumin concentration and the aqueous phase volume showed a significant influence on response parameters. Albumin nanospheres with sizes below 200 nm in diameter and very narrow size distributions were obtained in high yields (〉80%). Conclusions. This study describes a new preparation method for albumin nanoparticles which are suitable for future drug targeting studies.
    Type of Medium: Electronic Resource
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  • 17
    Electronic Resource
    Electronic Resource
    [s.l.] : Nature Publishing Group
    Nature 343 (1990), S. 617-622 
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] The murine developmental mutation T identifies an essential gene in mesoderm formation. Embryos lacking normal gene activity fail to form the notochord, the entire posterior region and the allan-tois, and die at about 10 days of gestation. We have isolated the T gene using a combination of ...
    Type of Medium: Electronic Resource
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  • 18
    Electronic Resource
    Electronic Resource
    [s.l.] : Macmillan Magazines Ltd.
    Nature 389 (1997), S. 884-888 
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] The mouse Brachyury (T) gene is the prototype of a growing family of so-called T-box genes which encode transcriptional regulators and have been identified in a variety of invertebrates and vertebrates, including humans. Mutations in Brachyury and other T-box genes result in drastic embryonic ...
    Type of Medium: Electronic Resource
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  • 19
    ISSN: 1546-1718
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Medicine
    Notes: [Auszug] Transmission ratio distortion in the mouse is caused by several t-complex distorters (Tcds) acting in trans on the t-complex responder (Tcr). Tcds additively affect the flagellar movement of all spermatozoa derived from t/+ males; sperm carrying Tcr are rescued, resulting in an advantage for t ...
    Type of Medium: Electronic Resource
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  • 20
    Electronic Resource
    Electronic Resource
    [s.l.] : Nature Publishing Group
    Nature 343 (1990), S. 657-659 
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] We initially examined expression of the T gene by RNA blot analysis of RNA from embryos and adult tissues. A 2.1-kilobase (kb) transcript is detected in 8.5- and 9.5-day gastrulation-stage embryos, and at much lower levels in 10.5 to 12.5-day embryos (Fig. 1). Expression of the T gene is not ...
    Type of Medium: Electronic Resource
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