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  • 1995-1999  (18)
  • 1
    Digitale Medien
    Digitale Medien
    Error-free 2.5 Gbit/s operation of a semi-insulating buried heterostructure side-injection light-controlled bistable laser diode (1997)
    Woodbury, NY : American Institute of Physics (AIP)
    Applied Physics Letters 70 (1997), S. 2946-2948 
    Details
    ISSN: 1077-3118
    Quelle: AIP Digital Archive
    Thema: Physik
    Notizen: We demonstrate optical response from a side-injection light-controlled bistable laser diode buried with semi-insulating InP using hydride vapor phase epitaxy. The buried surface around both the 〈110〉 and 〈−110〉 oriented mesas is flat. The bistable operation is obtained by applying control voltage to the saturable absorption region. After optimization of the device parameters, we obtained error-free operation at a bit rate as high as 2.5 Gbit/s. © 1997 American Institute of Physics.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1063/1.118752
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  • 2
    Digitale Medien
    Digitale Medien
    Growth of vertical-cavity surface-emitting laser structures on GaAs (311)B substrates by metalorganic chemical vapor deposition (1997)
    Woodbury, NY : American Institute of Physics (AIP)
    Applied Physics Letters 70 (1997), S. 3395-3397 
    Details
    ISSN: 1077-3118
    Quelle: AIP Digital Archive
    Thema: Physik
    Notizen: Vertical-cavity surface-emitting laser (VCSEL) structures have been grown on GaAs (311)B substrates by metalorganic chemical vapor deposition. C-doped GaAs and AlAs layers with smooth surface morphology and a hole concentration of 1018 cm−3 were obtained by optimizing the growth conditions; these conditions contributed to high-quality p-type distributed Bragg reflectors (DBRs). The devices on the (311)B substrates exhibited a threshold current of 9.6 mA, voltage of 2.1 V, and maximum power of 4.1 mW at a 20 μm φ size; these characteristics are similar to those obtained on (100) substrates. The polarization was aligned to [2¯33¯]. © 1997 American Institute of Physics.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1063/1.119182
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  • 3
    Digitale Medien
    Digitale Medien
    Structure of the exocrine pancreas of flounder (Paralichthys olivaceus): immunological localization of zymogen granules in the digestive tract using anti-trypsinogen antibody (1995)
    Oxford, UK : Blackwell Publishing Ltd
    Journal of fish biology 46 (1995), S. 0 
    Details
    ISSN: 1095-8649
    Quelle: Blackwell Publishing Journal Backfiles 1879-2005
    Thema: Biologie
    Notizen: Most fish have a diffuse exocrine pancreas located around the internal organs, but its exact structure is not well understood. In this study, we developed a method for analysing zymogen granules using anti-fish trypsinogen, and the structure of the flounder pancreas was examined by localizing pancreatic exocrine cells. Anionic trypsinogen was purified from eel pancreas by chromatography using DE-52-cellulose and Superose 12 columns. Rabbit antiserum (anti-eel trypsinogen antibody: anti-eTrg) was raised against purified trypsinogen. Immunoblotting analysis demonstrated that anti-eTrg recognized two isoforms of eel trypsinogens and trypsins. This antibody also reacted with flounder trypsin. Zymogen granules containing trypsinogen were visualized within pancreatic glandular cells of the flounder Paralichthys olivaceus by immunohistochemistry using anti-eTrg. The flounder exocrine pancreas was reconstructed from observations of serial sections of digestive tract. The exocrine pancreas cells were localized along the hepatic portal vein and the veins running to the portal vein from the intestine, stomach, pyloric appendage and spleen, forming a highly branched tissue. Interlobular ducts from pancreatic acini formed a pancreatic duct covered with smooth muscle at the point where it met (but did not join) the bile duct. The pancreatic duct opened into the intestinal lumen at the basal portion of the third pyloric appendage in parallel with the bile duct.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1111/j.1095-8649.1995.tb05970.x
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  • 4
    Digitale Medien
    Digitale Medien
    Evaluation of Mode II Interlaminar Fracture Toughness of Composite Laminates under Impact Loading (1997)
    s.l. ; Stafa-Zurich, Switzerland
    Key engineering materials Vol. 141-143 (Sept. 1997), p. 477-500 
    Details
    ISSN: 1013-9826
    Quelle: Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
    Thema: Maschinenbau
    Materialart: Digitale Medien
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/01/44/transtech_doi~10.4028%252Fwww.scientific.net%252FKEM.141-143.477.pdf
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  • 5
    Digitale Medien
    Digitale Medien
    Local application of basic fibroblast growth factor into the bone increases bone mass at the applied site in rabbits (1996)
    Springer
    Archives of orthopaedic and trauma surgery 115 (1996), S. 344-346 
    Details
    ISSN: 1434-3916
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Medizin
    Notizen: Abstract The effect of basic fibroblast growth factor (bFGF) applied locally into the bone under physiological conditions was investigated. An aqueous solution containing Oμg (vehicle), 100 μg or 400 μg recombinant human bFGF was percutaneously applied through a needle into the right ilium in rabbit, and the ilia were harvested 4 weeks after the application. Compared with vehicle-treated animals, bone mineral density measured by dual-energy X-ray increased in the 400 μg bFGF group. The width of trabeculae in the bFGF-treated groups was greater than in the vehicle group. These results showed that bFGF applied locally into the bone under physiological conditions affected bone formation, and suggested that such an application might have potential for increasing bone.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00420329
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  • 6
    Digitale Medien
    Digitale Medien
    Familial occurrence of hyperplastic callus in osteogenesis imperfecta (1997)
    Springer
    Archives of orthopaedic and trauma surgery 116 (1997), S. 500-503 
    Details
    ISSN: 1434-3916
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Medizin
    Notizen: Abstract There is a hypothesis that hyperplastic callus (HC) in osteogenesis imperfecta (OI) is not merely a rare complication but could actually be inherited, although this idea has not yet been investigated. We described two cases, a mother and son, with mild OI, normal scleral colour and no dentinogenesis imperfecta, who repeatedly had HC in their femur. Familial occurrence of HC was found in 13 cases in 5 families among 21 cases in 7 families with a familial background of OI in the literature (including this report). This is higher than the reported incidence of HC, 1.5% (5 cases of 333), and the mode of transmission is concomitant with autosomal dominant inheritance in all these families. Since a review of 47 cases in the literature shows that HC occurs independently of scleral colour and the degree of bone fragility, it may be an additional criterion for subdivision within each type of the Sillence classification.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00387587
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  • 7
    Digitale Medien
    Digitale Medien
    A simple technique for correction of complicated tibial deformity including rotational deformity (1998)
    Springer
    Archives of orthopaedic and trauma surgery 117 (1998), S. 259-261 
    Details
    ISSN: 1434-3916
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Medizin
    Notizen: Abstract Although the simplest way to correct bone deformity is one-stage correction, the problem associated with that method is overstretching of the soft tissues, which limits the correction and leads to complications such as compartment syndrome or peripheral nerve palsy. If an adequate amount of tissue necessary for correction is formed in advance, the deformity can be corrected safely at one stage without overstretching of the tissues. A leg lengthening technique was employed to form the necessary tissues. After leg lengthening with an unilateral external fixator (Hifixator), deformities were corrected manually at one stage without anesthesia, and the corrected positions were again secured with the fixator. To correct rotational deformity, two sets of pins were inserted into the proximal bone fragment of the tibia at the time of the operation, and after lengthening the proximal pin clamp of the fixator was disconnected from one pin set and reconnected to the other set. We applied this method to four tibias of three patients without any complications. The tension of the tissues was monitored using a pressure sensor built into a Hifixator to prevent the tissues from overstretching. During and after the correction, the tension of the tissue was maintained at less than before the correction.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/s004020050241
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  • 8
    Digitale Medien
    Digitale Medien
    Familial occurrence of hyperplastic callus in osteogenesis imperfecta (1997)
    Springer
    Archives of orthopaedic and trauma surgery 116 (1997), S. 500-503 
    Details
    ISSN: 1434-3916
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Medizin
    Notizen: Abstract There is a hypothesis that hyperplastic callus (HC) in osteogenesis imperfecta (OI) is not merely a rare complication but could actually be inherited, although this idea has not yet been investigated. We described two cases, a mother and son, with mild 01, normal scleral colour and no dentinogenesis imperfecta, who repeatedly had HC in their femur. Familial occurrence of HC was found in 13 cases in 5 families among 21 cases in 7 families with a familial background of OI in the literature (including this report). This is higher than the reported incidence of HC, 1.5% (5 cases of 333), and the mode of transmission is concomitant with autosomal dominant inheritance in all these families. Since a review of 47 cases in the literature shows that HC occurs independently of scleral colour and the degree of bone fragility, it may be an additional criterion for subdivision within each type of the Sillence classification.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00387587
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  • 9
    Digitale Medien
    Digitale Medien
    Changes of callus diameter during axial loading and after fixator removal in leg lengthening (1998)
    Springer
    Archives of orthopaedic and trauma surgery 117 (1998), S. 464-467 
    Details
    ISSN: 1434-3916
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Medizin
    Notizen: Abstract We retrospectively reviewed nine tibial lengthenings in seven achondroplastic patients. The callotasis method was used, and a unilateral type lengthener, either the Dynamic Axial Fixator (Orthofix, Italy; eight legs) or the High Functional Fixator (Matsumoto Co., Japan; one leg), was applied. The distracted length averaged 14.6 (range 10–18) cm. The minimum diameter of the callus was measured using a ruler on anteroposterior and lateral radiographs. The callus diameter ratio (%) was calculated as the callus diameter divided by the original diaphysis diameter. For periods during axial loading and after removal of the fixator in each patient, a single regression line was drawn on the callus diameter ratio data using the least squares method, and the diameter change rate (%/day) was evaluated by inclination of this line. The diameter change rates during axial loading were negative in six legs, but those after fixator removal were positive in all legs, and the latter were significantly greater than the former. The diameter change rates after fixator removal on the anteroposterior radiographs were negatively correlated with the callus diameter ratio at the time of fixator removal (r = 0.84, P = 0.0008). Simple axial loading may not be a sufficient mechanial environment for restoration of the physiological shape, and it is important to be aware that we cannot expect the callus diameter to increase by this means alone.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/s004020050294
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  • 10
    Digitale Medien
    Digitale Medien
    Risk factors of myelopathy at the atlantoaxial level in spondyloepiphyseal dysplasia congenita (1998)
    Springer
    Archives of orthopaedic and trauma surgery 117 (1998), S. 468-470 
    Details
    ISSN: 1434-3916
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Medizin
    Notizen: Abstract Spondyloepiphyseal dysplasia congenita (SEDC) can be accompanied by hypoplasia of the odontoid and/or lax ligaments which may lead to spinal cord compression. Since an early diagnosis of myelopathy is essential for rational treatment, identification of the high-risk factors is imperative. Sixteen patients were retrospectively reviewed, 10 male and 6 female, and their average age at the time of examination was 18 (range 3–37) years. Myelopathy was seen in 6 individuals. Five were associated with atlantoaxial subluxation, and the critical value of space available for the spinal cord at the level of the atlas was 10 mm or less. Their height was less than –7SD of average Japanese of the same age, and all were associated with severe coxa vara. Although SEDC itself is a risk factor, marked short stature of less than –7SD and severe coxa vara are particularly high-risk factors for cord compression at the level of the atlas.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/s004020050295
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