Library

X
feed icon rss

Your email was sent successfully. Check your inbox.

An error occurred while sending the email. Please try again.

Proceed reservation?

Export
  • 1
    Electronic Resource
    Electronic Resource
    Interferometric measurements of the diameters of a single-crystal silicon sphere (1992)
    [S.l.] : American Institute of Physics (AIP)
    Review of Scientific Instruments 63 (1992), S. 5320-5325 
    Details
    ISSN: 1089-7623
    Source: AIP Digital Archive
    Topics: Physics , Electrical Engineering, Measurement and Control Technology
    Notes: A new interferometer has been developed for the accurate determination of the density of a silicon crystal, in which a single-crystal silicon sphere of nearly perfect geometry is placed in a Fabry–Perot etalon of accurately known plate distance, and the diameters are obtained by measuring the two gaps between the etalon and the adjacent surface of the sphere. A new method is used to measure the sum of the length of the two gaps by scanning the etalon against the sphere. Two wavelengths, 633 nm from a frequency-stabilized He–Ne laser and 441 nm from a free-running He–Cd laser, are used to determine the order of interference by applying the method of exact fractions. The diameter of about 94 mm has been measured with a resolution of 0.5 nm. Diameter measurements from uniformly distributed directions have shown that the mean diameter has been determined with a standard deviation of 8.6 nm, corresponding to 0.28 ppm in the volume determination. The total uncertainty of the volume is estimated to be 0.34 ppm. Effects of a thin oxide layer and impurities on the bulk density are discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.1143447
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 2
    Electronic Resource
    Electronic Resource
    Inhibitory Action of CCK-OP on Rat Proximal Colon (1994)
    Oxford, UK : Blackwell Publishing Ltd
    Annals of the New York Academy of Sciences 713 (1994), S. 0 
    Details
    ISSN: 1749-6632
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Natural Sciences in General
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1749-6632.1994.tb44109.x
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 3
    Electronic Resource
    Electronic Resource
    Effect of light intensity on linear shrinkage of photo-activated composite resins during setting (2005)
    Oxford, UK : Blackwell Science Ltd
    Journal of oral rehabilitation 32 (2005), S. 0 
    Details
    ISSN: 1365-2842
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: summary  The purpose of this investigation was to examine the effects of light intensity on linear shrinkage of photo-activated composite resins during setting. The materials used were four commercially available photo-activated composite resins. Three light-irradiation instruments were selected and prepared so as to obtain four light intensities (200, 480, 800 and 1600 mW cm−2). The linear shrinkage during setting was examined 10 min after light irradiation using a trial balance plastometer, and the specimen thickness was 2·0 mm for all materials. The depth of cure was examined according to the test method described in the International Organization for Standardization (ISO/FDIS 4049: 2000(E)). In measuring the linear shrinkage 60 s from the start of light irradiation for 10 s, there was a significant correlation (r = 0·89–0·94) between the amount of linear shrinkage and the light intensity: an increase in light intensity produced a greater linear shrinkage. Furthermore, there was a significant correlation (r = 0·92–1·0) between the linear shrinkage and the irradiation time: an increase in irradiation time resulted in a greater linear shrinkage. Values of the depth of cure ranged from 1·69 to 3·75 mm.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1365-2842.2004.01363.x
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 4
    Electronic Resource
    Electronic Resource
    Structure of N-γ-L-glutamyl-L-cysteine ethyl ester monohydrate (1990)
    Oxford [u.a.] : International Union of Crystallography (IUCr)
    Acta crystallographica 46 (1990), S. 2247-2249 
    Details
    ISSN: 1600-5759
    Source: Crystallography Journals Online : IUCR Backfile Archive 1948-2001
    Topics: Chemistry and Pharmacology , Geosciences , Physics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1107/S0108270190000774
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 5
    Electronic Resource
    Electronic Resource
    Radiation-induced meningiomas and their proliferative activity (1990)
    Springer
    Acta neurochirurgica 102 (1990), S. 69-72 
    Details
    ISSN: 0942-0940
    Keywords: Meningioma ; irradiation ; proliferative activity ; bromodeoxyuridine uptake
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary Two cases of meningiomas, which are considered to have been caused by the preceding irradiation, are reported. In both cases, the cytokinetic study of the tumour using bromodeoxyuridine (BrdU) was performed. The percent of the tumour cells in the S phase of the cell cycle was less than 1% in both cases. The low labelling indices might suggest a relatively slow growing potential of these tumours, though the radiation-induced meningiomas were reported as being rapidly growing and malignant.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01402189
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 6
    Electronic Resource
    Electronic Resource
    Repeat angiography and magnetic resonance imaging (MRI) of dissecting aneurysms of the intracranial vertebral artery (1993)
    Springer
    Acta neurochirurgica 121 (1993), S. 123-129 
    Details
    ISSN: 0942-0940
    Keywords: Dissecting aneurysm ; repeat angiography ; MRI
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary We here present 4 cases with dissecting aneurysm (DA) of the intracranial vertebral artery, who were followed up by repeat cerebral angiography and MRI. The patients consisted of 2 males and 2 females, and the mean age was 43 years. Two cases were associated with polyarteritis nodosa (PN) and hypertension, respectively. Three of the cases developed subarachnoid haemorrhage (SAH), while the other one suffered from lateral medullary syndrome. In cerebral angiography, “pearl and string” signs were revealed in all cases, while a “double lumen” indicating a true diagnostic sign of DA was demonstrated in only one case. Repeat angiography showed that a bleb formation with a bulging of the aneurysmal sac was seen in 2 cases, and an irregularity of the wall in one case. On the other hand in one case, the ectatic part shrank, while the stenotic part was restored. In magnetic resonance imaging (MRI), a hyperintensity mass on T 1-weighted image (T 1-WI) adjacent to flow void suggesting either an intramural haematoma or a linear shape hyperintensity on T1-WI were demonstrated in 3 cases. In the follow up MRI done in 2 cases, a serial change in the intensity from iso-intensity to hyperintensity on T 1-WI was observed in one case suggesting intramural haemorrhage, while an enlargement of the ectatic flow void was seen in the other case. Three of 4 cases were operated on by trapping of the aneurysms. One, who had systemic vascular diseases due to PN, and repeat angiography showed a regression of the aneurysm, was conservatively treated. The outcome was excellent in the 3 surgical cases, whilst the one medically treated case was also excellent without any rebleeding. In conclusion, repeat neuro-imaging procedures are strongly recommended to clarify the possibility of a spontaneous repair of the dissection, and to consider the surgical strategy for the lesion.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01809262
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 7
    Electronic Resource
    Electronic Resource
    Expression of cadherin cell adhesion molecules during human skin development: morphogenesis of epidermis, hair follicles and eccrine sweat ducts (1992)
    Springer
    Archives of dermatological research 284 (1992), S. 159-166 
    Details
    ISSN: 1432-069X
    Keywords: Cadherin cell adhesion molecules ; Skin morphogenesis ; Epidermis ; Hair follicles ; Ecerine sweat ducts
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary Expression of E (epithelia) and P (placental) cadherin cell adhesion molecules was examined immunohistochemically using human developing skin. In adult skin, E-cadherin was expressed on cell surfaces of whole epidermal layers including skin appendages, whereas P-cadherin was expressed only on those of basal layers and the outer layers of skin appendages, which was consistent with the compartment of proliferating cells. In fetal skin, while the patterns of E- and P-cadherin expression were generally similar to those in the adult, P-cadherin temporarily showed a unique spatiotemporal expression pattern in developing sweat ducts. During this stage, the expression of P-cadherin accumulated in the epidermal ridges and showed a discrepancy with the compartment of proliferating cells. These results suggest that the expression of P-cadherin is spatiotemporally controlled, and may be closely related to the segregation of basal layers as well as to the arrangement of epidermal cells into eccrine sweat ducts, but is not closely related to cell proliferation.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00372710
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 8
    Electronic Resource
    Electronic Resource
    Direct spinal versus peripheral nerve stimulation as monitoring techniques in epidurally recorded spinal cord potentials (1991)
    Springer
    Acta neurochirurgica 108 (1991), S. 122-127 
    Details
    ISSN: 0942-0940
    Keywords: Spinal cord monitoring ; spinal cord evoked potentials ; spinal somatosensory evoked potentials ; spinal cord stimulation
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary We recorded spinal cord evoked potentials (SCEPs) and spinal somatosensory evoked potentials (spinal SEPs) in 30 operations following stimulation of the epidural spinal cord and the peripheral nerve, respectively, to compare their feasibility as an intraoperative technique for spinal cord monitoring. SCEPs produced quicker responses and had larger amplitudes with simpler waveforms. SCEPs could reflect residual function of the pathological spinal cord and predict the postoperative clinical outcome, findings which are not observed with spinal SEPs. Moreover, SCEPs had a much higher sensitivity to spinal cord insult. Therefore, we conclude that the SCEPs were more appropriate indicator than the spinal SEPs as an intra-operative monitoring method for spinal cord function.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01418519
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 9
    Electronic Resource
    Electronic Resource
    Reoperation for Moyamoya disease refractory to encephalo-duro-arterio-synangiosis (1990)
    Springer
    Acta neurochirurgica 107 (1990), S. 129-132 
    Details
    ISSN: 0942-0940
    Keywords: Moyamoya disease ; surgical treatment ; cases refractory to EDAS ; operative techniques of the second operation
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary Three cases of Moyamoya disease successfully treated by reoperation are reported with special reference to the operative techniques in the second operation. These children first underwent encephalo-duro-arterio-synangiosis (EDAS). Because two of the three postoperative collateral formations through EDAS were either poor or not present at all and their symptoms remained. Encephalo-myosynangiosis (EMS) was later added in the posterior frontal and/or parietal regions of the same side as the former EDAS. In the remaining one, the collaterals through EDAS were well formed but transient ischaemic attack (TIA) persisted in the lower limb. The collateral to the middle cerebral arterial (MCA) distribution, even though seemingly well formed, was not sufficient to obtain a complete subsidence of the symptoms. In this case encephalo-myo-arteriosynangiosis (EMAS) was later added to the antero-medial frontal region of the same side as the EDAS to form collaterals to the anterior cerebral arterial (ACA) distribution. In all three cases the angiograms after the second operation showed good formation of collaterals, and the symptoms subsided. The causes of poor collateral formation through EDAS and operative techniques for the additional operation for those cases refractory to EDAS are discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01405791
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 10
    Electronic Resource
    Electronic Resource
    Lateral ventricular arteriovenous malformations: Natural history and surgical indications (1991)
    Springer
    Acta neurochirurgica 112 (1991), S. 37-46 
    Details
    ISSN: 0942-0940
    Keywords: Arteriovenous malformation ; lateral ventricle ; natural history ; operative indications ; results
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary The authors report 21 cases of lateral ventricular arteriovenous malformation (AVM) focusing on their natural history and surgical indications. Eighteen of 21 patients (86%) had bleedings prior to admission. We performed definitive surgery in 9 patients and conservative treatment in 12 patients. In 7 of 9 patients (78%) in the operative group and in 5 of 12 patients (42%) in the non-operative group, the nidus of the AVM was less than 4 cm in diameter. The other 2 AVMs in the operative group, more than 4 cm in diameter, were located in the temporal lobe and widely extended to the temporal horn of the lateral ventricle. The nidi of the AVMs were totally removed in all 9 cases in the operative group. All patients have been doing well except one who had a mental breakdown 6 years after surgery. In 10 patients in the non-operative group, AVMs were located in the left cerebral hemispheres. Three patients in the non-operative group had rebleeding of the AVM. Two of the 12 patients in the non-operative group (17%) died of the recurrent haemorrhages. The rate of bleeding of the lateral ventricular AVM seems to be higher than that of the cerebral cortical AVM, but the mortality due to recurrent bleeding might be similar between the two. The operative indications we made depended on the sizes and locations of the AVMs. For AVMs in the temporal horn, even though they were large, we performed total removals of the nidi and had good results. We did not perform any definitive surgery for AVMs more than 4 cm in diameter except for those in the temporal horn. The mortality and morbidity of the 21 cases were 10% and 14%, respectively. Patients with AVMs in the temporal horn and patients with small AVMs in the frontal horn were good candidates for definitive surgery. We undertook conservative treatment for patients with large AVMs, and the results were acceptable.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01402452
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
Close ⊗
This website uses cookies and the analysis tool Matomo. More information can be found here...