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  • 1
    Electronic Resource
    Electronic Resource
    Theoretical investigation of the electronic structure of the mixed-sandwich complex (.eta.5-cyclopentadienyl)(.eta.6-benzene)iron and its cation (1993)
    s.l. : American Chemical Society
    Organometallics 12 (1993), S. 47-55 
    Details
    ISSN: 1520-6041
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/om00025a013
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  • 2
    Electronic Resource
    Electronic Resource
    Myotonic dystrophy and limb girdle muscular dystrophy in one family (1994)
    Springer
    Journal of molecular medicine 72 (1994), S. 409-413 
    Details
    ISSN: 1432-1440
    Keywords: Myotonic dystrophy ; Limb girdle muscular dystrophy ; Genetics
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract A family is reported in which a 29-year-old woman showed the clinical features of myotonic dystrophy while her 26-year-old brother presented with the clinical picture of limb girdle syndrome. In the affected female, direct genetic testing for the specific myotonic dystrophy mutation on chromosome 19 revealed abnormal expansion of a repeat unit containing the three nucleotides cytosine, thymine, and guanine (CTG) — typical for myotonic dystrophy — while her diseased brother displayed two normal alleles. This supports the hypothesis of the extremely rare occurrence of two clinically and genetically different myopathies in one family. Genetic analysis of six other family members showed that the father of the diseased siblings as well as all of his three brothers and sisters had a pathological CTG repeat expansion, and that the other two family members tested had a normal allelic pattern. The number of CTG repeats in the diseased women was approximately tenfold higher than in her asymptomatic relatives who revealed an abnormal allelic pattern. The increase in CTG repeats with transmission to a subsequent generation in this family was paralleled by a dramatic increase in the severity of myotonic dystrophy.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00252840
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  • 3
    Electronic Resource
    Electronic Resource
    The frequency of the CF ΔF508 deletion in CF chromosomes of different ethnic origin (1990)
    Springer
    Human genetics 〈Berlin〉 85 (1990), S. 392-393 
    Details
    ISSN: 1432-1203
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary The identification of the molecular defect in a significant proportion of cystic fibrosis families (in our series up to 60%) allows direct DNA diagnosis.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02428269
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  • 4
    Electronic Resource
    Electronic Resource
    Automated percutaneous lumbar discectomy (APLD) — Method and 1-Year follow-up (1992)
    Springer
    European radiology 2 (1992), S. 292-298 
    Details
    ISSN: 1432-1084
    Keywords: Spine surgery ; Automated percutaneous discectomy ; Lumbar disc herniation
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract From July 1989 to June 1991 135 discs on 129 patients were treated, in about twothirds at level L4/5 and at the remaining one third L5/S1.15% (n = 2) failed technically. Sixty eight patients are in the 1-year follow-up. Average age was 41 years (range 16–68 years). Average pain duration was 12 months, and average aspiration time was 25.8 min (range 15–45 min). All patients had contained disc lesions, suffered from radicular symptoms and had not responded to conservative treatment. 67,1% (group A, n =45) had a failure rate of 17,8%. Patients with associated degenerations (group B, n = 7) had a failure rate of 35,3%. 80% of the patients with recurrent radicular symptoms (group C, interval patients, n = 6) were free of symptoms. Re herniation rate in all patients was 2.9%, and the laminectomy rate 4.4%. No major complications were noted. Treated disc level, patient aage, aspirated nucleus material and CT changes revealed no correlation to clinical success. Patients with associated degenerations (group B) as wellas those with longer pain duration and larger contained disc lesions had a significantly worse outcome.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00175429
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  • 5
    Electronic Resource
    Electronic Resource
    Mucocutaneous bleeding, a rare but severe complication in nephrosialidosis (1994)
    Springer
    European journal of pediatrics 153 (1994), S. 703-704 
    Details
    ISSN: 1432-1076
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02190699
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  • 6
    Electronic Resource
    Electronic Resource
    Laser Doppler flowmetry of focal ischaemia and reperfusion in deep brain structures in rats (1994)
    Springer
    Acta neurochirurgica 131 (1994), S. 151-156 
    Details
    ISSN: 0942-0940
    Keywords: Middle cerebral artery occlusion ; cerebral blood flow ; ischaemia ; reperfusion ; laser Doppler flowmetry ; hydrogen clearance
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary Monitoring cerebral blood flow during focal ischaemia and reperfusion with established techniques such as hydrogen clearance and autoradiography is difficult. Laser Doppler flowmetry is a new technique, it allows one to continuously measure blood flow in small tissue samples. The objective of this study was to compare laser Doppler flowmetry with hydrogen clearance using a new single fiber probe to obtain measurements in deep brain structures and then to show the temporal profile of cerebral blood flow during focal ischaemia and after reperfusion. First, the single fiber laser Doppler method was compared with the hydrogen clearance method in ten Wistar rats. Second, focal cerebral ischaemia was induced in fifteen Wistar rats using a model of middle cerebral artery occlusion based on the intravascular insertion of a nylon suture; reperfusion occurred after withdrawal of the suture. The laser Doppler probe was placed in the lateral caudatoputamen, and local cerebral blood flow was measured continuously before and during occlusion as well as after reperfusion. The relative blood flow values obtained by the laser Doppler method and the hydrogen clearance method showed a good correlation (r=0.76) and a linear relationship. A rapid decrease in laser Doppler flowmetry to 42±16% of former baseline values was seen with occlusion of the middle cerebral artery; during occlusion cerebral blood flow remained at this level. Reperfusion resulted in a heterogeneous pattern of cerebral blood flow as laser Doppler flowmetry values ranged from 25% to 134% of baseline values. The effects of middle cerebral artery occlusion and reperfusion on cerebral blood flow can be monitored on-line with laser Doppler flowmetry. Our findings suggest that this method, with the high spatial and temporal resolution characteristics of its new single fiber probe, allows one to continuously measure microcirculatory blood flow in deep brain structures.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01401466
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  • 7
    Electronic Resource
    Electronic Resource
    Hydration of a structured excess charge distribution: Infrared spectroscopy of the O2−⋅(H2O)n, (1≤n≤5) clusters (2001)
    College Park, Md. : American Institute of Physics (AIP)
    The Journal of Chemical Physics 114 (2001), S. 2698-2706 
    Details
    ISSN: 1089-7690
    Source: AIP Digital Archive
    Topics: Physics , Chemistry and Pharmacology
    Notes: To explore how a structured excess charge distribution affects the hydration of an anion, we report mid-IR, argon predissociation spectra for the hydrated superoxide cluster anions, O2−⋅(H2O)n, 1≤n≤5. This size range was chosen to establish the evolution of the structures through the putative shell closing [Weber et al., Science 287, 2461 (2000)] for superoxide hydration at the tetrahydrate. Whereas the observed bonding motifs for n≤4 are those of single water molecules and dimeric subclusters bound to the ion, the pentahydrate spectrum displays strong bands in the region typically associated with ring modes of the water trimer. The present results reinforce the conclusion that the tetrahydrate adopts an especially robust structure in which each water molecule forms a single ionic H bond to one of the lobes of the π* highest occupied molecular orbital in superoxide. © 2001 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.1338529
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  • 8
    Electronic Resource
    Electronic Resource
    Intermolecular interaction energies from the total energy bifunctional: A case study of carbazole complexes (2002)
    College Park, Md. : American Institute of Physics (AIP)
    The Journal of Chemical Physics 116 (2002), S. 6411-6421 
    Details
    ISSN: 1089-7690
    Source: AIP Digital Archive
    Topics: Physics , Chemistry and Pharmacology
    Notes: An approach in which the total energy of interacting subsystems is expressed as a bifunctional depending explicitly on two functions: electron densities of the two molecules forming a complex (ρ1 and ρ2) was used to determine the equilibrium geometry and the binding energy of several weak intermolecular complexes involving carbazole and such atoms or molecules as Ne, Ar, CH4, CO, and N2. For these complexes, the experimental dissociation energies fall within the range from 0.48 to 2.06 kcal/mol. Since the effect of the intermolecular vibrations on the dissociation energy is rather small, the experimental measurements provide an excellent reference set. The obtained interaction energies are in a good agreement with experiment and are superior to the ones derived from conventional Kohn–Sham calculations. A detailed analysis of relative contribution of the terms which are expressed using approximate functionals (i.e., exchange-correlation Exc[ρ1+ρ2] and nonadditive kinetic energy Tsnad[ρ1,ρ2]=Ts[ρ1+ρ2]−Ts[ρ1]−Ts[ρ2]) is made. The nonvariational version of the applied formalism is also discussed. © 2002 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.1462613
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  • 9
    Electronic Resource
    Electronic Resource
    Argon predissociation and electron autodetachment spectroscopy of size-selected CH3NO2−⋅Arn clusters (2001)
    College Park, Md. : American Institute of Physics (AIP)
    The Journal of Chemical Physics 115 (2001), S. 10718-10723 
    Details
    ISSN: 1089-7690
    Source: AIP Digital Archive
    Topics: Physics , Chemistry and Pharmacology
    Notes: Photodetachment spectra of CH3NO2−⋅Arn clusters in the mid-IR are dominated by three strong resonances. These are assigned to autodetaching (AD) C–H stretching vibrational transitions in the valence (as opposed to dipole-bound) form of the molecular anion on the basis of a H/D isotopic substitution study and their solvation dependence. The AD resonances disappear promptly upon addition of the third argon atom, while the resonant structure appears in the action spectrum for formation of CH3NO2− photoproducts for n≥2. The strong argon solvation dependence of the photoproducts is traced to the rapidly changing endoergicity of the electron loss channel due to the differential solvation behavior of the valence anion relative to the neutral. We discuss a statistical limit for this competition, and introduce an intramolecular vibrational energy redistribution mediated AD mechanism unique to polyatomic anions. © 2001 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.1418251
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  • 10
    Electronic Resource
    Electronic Resource
    Osteoblastic cells regulate the haematopoietic stem cell niche (2003)
    [s.l.] : Macmillian Magazines Ltd.
    Nature 425 (2003), S. 841-846 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] Stem cell fate is influenced by specialized microenvironments that remain poorly defined in mammals. To explore the possibility that haematopoietic stem cells derive regulatory information from bone, accounting for the localization of haematopoiesis in bone marrow, we assessed mice that were ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/nature02040
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