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  • 1
    Electronic Resource
    Electronic Resource
    High-spin states in ^9^4Tc
    Amsterdam : Elsevier
    Nuclear Physics, Section A 373 (1982), S. 483-492 
    Details
    ISSN: 0375-9474
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Physics
    Type of Medium: Electronic Resource
    URL: http://linkinghub.elsevier.com/retrieve/pii/0375-9474(82)90545-0
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  • 2
    Electronic Resource
    Electronic Resource
    Amylose conformation in aqueous solution: a small-angle X-ray scattering study
    Amsterdam : Elsevier
    International Journal of Biological Macromolecules 7 (1985), S. 161-166 
    Details
    ISSN: 0141-8130
    Keywords: Debye scattering of chain molecules ; Polysaccharides ; amylose aqueous solutions ; amylose conformation ; carboxymethylamylose ; small-angle X-ray scattering
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Biology , Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://linkinghub.elsevier.com/retrieve/pii/0141-8130(85)90019-4
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  • 3
    Electronic Resource
    Electronic Resource
    A mathematical model to predict the population dynamics of Oryza sativa var. sylvatica (2001)
    Oxford UK : Blackwell Science Ltd
    Weed research 41 (2001), S. 0 
    Details
    ISSN: 1365-3180
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: A mathematical model has been developed for the prediction of the population dynamics of Oryza sativa L. var. sylvatica. The input variables included in the model were the seedbank composition; the number of panicles per plant and seeds per panicle; the rate of shattering; the seed longevity and the number of weed seeds contained in the sown grain; the type of soil tillage (ploughing, minimum and No tillage); the weed control efficacy; and the predation. The output variables were the number of seedlings that emerged from different depths and the seedbank evolution. The model relies on probability matrices that predict the vertical movement of the seeds after different soil tillage practices. Sensitivity analysis showed that the weed control efficacy and number of grains per panicle were the parameters that had the highest influence on the development of the weed population. The model evaluation was carried out by comparing the predicted with the observed seedling emergence at different seedbank values and under different soil tillage conditions. The model performance showed a tendency to overestimate seedling densities. The agreement between the estimated and experimental data was closely related to the accuracy of the input values of the seed distribution along the soil profile.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1046/j.1365-3180.2001.00244.x
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  • 4
    Electronic Resource
    Electronic Resource
    Light-scattering, X-ray diffraction, elemental analysis and infrared spectro- photometry characterization of chitosan, a chelating polymer
    Amsterdam : Elsevier
    Talanta 19 (1972), S. 1222-1226 
    Details
    ISSN: 0039-9140
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://linkinghub.elsevier.com/retrieve/pii/0039-9140(72)80068-7
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  • 5
    Electronic Resource
    Electronic Resource
    Prediction of Heteranthera reniformis competition with flooded rice using day–degrees (1996)
    Oxford, UK : Blackwell Publishing Ltd
    Weed research 36 (1996), S. 0 
    Details
    ISSN: 1365-3180
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: In field studies carried out in 1992 and 1993, several durations of growth of Heteranthera reniformis Ruitz et Pavon were established in flooded rice (Oryza sativa L.) to evaluate weed influence on crop yield using day-degree predictive models for weed growth. H. reniformis was allowed to emerge at 7-day intervals from rice emergence until 49 days later. Weeds that emerged with the rice accumulated 403 day-degrees during the first 49 days. Weeds allowed to utilize 308 day-degrees had a dry weight reduction of 20% compared with plants that emerged with the rice. With the loss of all 403 day-degrees dry weight was reduced by about 95%. Maximum leaf area index (LAI) was 2.8, reached at 308 day-degrees. Weed density ranged from 48 to 5 plants m-2 when all 403 day-degrees were accumulated or lost by the plant respectively. When the weed lost only 95 day-degrees out of the possible 403 (1 week's delay in emergence) rice yield was 34% and 39% lower in 1992 and 1993 respectively. When the weed was allowed to accumulate ail 403 day-degrees yield reduction reached 62% in 1992 and 68% in 1993, very similar to the control plot, which were maintained weedy throughout (64% and 70.5%). After an accumulation of 403 day-degrees the weed reduced the number of rice panicles by 45% in 1992 and 38% in 1993.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1365-3180.1996.tb01815.x
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  • 6
    Electronic Resource
    Electronic Resource
    Tumorigenicity of cyclic nitrosamines in Syrian golden hamsters (1970)
    Springer
    Journal of cancer research and clinical oncology 74 (1970), S. 185-189 
    Details
    ISSN: 1432-1335
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Summary Nitrosoazetidine and nitrosoheptamethyleneimine have been tested by feeding in drinking water to Syrian golden hamsters. Nitrosoazetidine appeared noncarcinogenic in this species. Nitrosoheptamethyleneimine was strongly carcinogenic, producing tumors in a large proportion of the animals mainly in the forestomach, esophagus, larynx, pharynx, nasal cavity and trachea. Most of the tumors in the esophagus, larynx, pharynx and nasal cavity were malignant. Although this compound produces bronchogenic carcinomas in the lungs of rats, this tumor was not induced by nitrosoheptamethyleneimine in hamsters.
    Notes: Zusammenfassung Durch Verfütterung im Trinkwasser wurden Nitroso-azetidin und Nitroso-heptamethylenimin am Syrischen Goldhamster getestet. Nitroso-azetidin scheint in dieser Species nicht carcinogen zu sein. Nitroso-heptamethylenimin war stark carcinogen und führte zur Bildung einer großen Zahl von Tumoren, hauptsächlich im Vormagen, im Oesophagus, Larynx, Nasenhöhle und Trachea. Die meisten der Tumoren im Oesophagus, Larynx, Pharynx und Nasenhöhle waren bösartig. Obgleich die Verbindung in der Rattenlunge zu Bronchus-Carcinomen führt, wurden derartige Tumoren durch Nitroso-heptamethylenimin bei Hamstern nicht induziert.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00525884
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  • 7
    Electronic Resource
    Electronic Resource
    Synergistic effect of ferric oxide on dimethylnitrosamine carcinogenesis in the Syrian golden hamster (1973)
    Springer
    Journal of cancer research and clinical oncology 79 (1973), S. 31-38 
    Details
    ISSN: 1432-1335
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Zusammenfassung Die carcinogene Wirkung von subkutan injiziertem Dimethyl-Nitrosamin (DMN) beim syrischen Goldhamster sowie der synergistische Effekt von intratrachealer Instillation von Eisenoxyd wurde untersucht. DMN allein verursachte cavernöse Haemangiome, Haemangioendotheliome, Haemangioendotheliosarkome sowie ein Hepatom in der Leber und ein Papillom des Magens, aber keine Tumoren des Atmungstraktes. Wenn Eisenoxyd zusätzlich zu DMN gegeben wurde, konnten Lebertumoren vaskulären und biliären Ursprungs gefunden werden, aber auch noch Tumoren der Nasenhöhle, neuroepitheliale Tumoren und ein Adenom. Daraus wird geschlossen, daß subkutan injiziertes DMN ein sehr wirksames Carcinogen für den syrischen Goldhamster darstellt, das Lebertumoren vaskulären, biliären und hepatozellulären Baues erzeugt. Das Fehlen der cancerogenen Wirkung im Atmungstrakt wird auf das Fehlen eines Metabolismus des DMN in der Lunge zurückgeführt.
    Notes: Summary The carcinogenic effect of dimethylnitrosamine (DMN) injected subcutaneously in Syrian golden hamsters as well as the synergistic effect of intratracheal instillations of ferric oxide were studied. DMN alone induced cavernous hemangiomas, hemangioendotheliomas, hemangioendotheliosarcomas, as well as one hepatoma of the liver and one papilloma of the forestomach, but no tumors of the respiratory system. When ferric oxide was given in addition to DMN, liver tumors of vascular and biliary origin were seen, in addition to tumors of the nasal cavity, neuroepithelial tumors and one adenoma. It was concluded that subcutaneously injected DMN is a powerful hepatic carcinogen for the Syrian golden hamster, producing liver tumors of vascular, bile duct as well as liver cell origin. The lack of tumorigenic effect in the respiratory system was considered to be due to the lack of metabolism of DMN in the lung.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00284337
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  • 8
    Electronic Resource
    Electronic Resource
    Laparoscopic splenectomy (1998)
    Springer
    Surgical endoscopy and other interventional techniques 12 (1998), S. 1345-1347 
    Details
    ISSN: 1432-2218
    Keywords: Key words: Splenectomy — Endoscopic surgery — Endoscopic instrumentation
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract Background: With the evolution of laparoscopic surgery comes the need for specific instruments that apply traction to parenchymal tissue, like the spleen, without exposing the organ to the associated high risk of bleeding. To meet this need, we designed and developed a suction-cup grasper that allows easy grasping and manipulation of the spleen. Some of the difficulties usually encountered during laparoscopic splenectomy may be overcome by using this device. Materials: The instrument consists of a cone-shaped, silicone rubber suction cup designed with an antislip internal surface. The cup is connected to a support arm with a flexible distal end that can be rotated. Traction is exerted with a commonly available suction system. The device is inserted through a 12-mm-diameter guide sheath. Results: The two interventions performed with the atraumatic device were completed with laparoscopic technique. No complications arose during or after the operations. The average operating time was 110 min. The patients were discharged after 4 and 5 days postoperative, respectively. Conclusions: As a device specifically designed for grasping parenchymal organs, the atraumatic suction grasper affords the operator a faster and safer technique in laparoscopic splenectomy.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s004649900853
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  • 9
    Electronic Resource
    Electronic Resource
    Electromagnetic fission of238U at 600 and 1000 MeV per nucleon (1995)
    Springer
    The European physical journal 353 (1995), S. 197-204 
    Details
    ISSN: 1434-601X
    Keywords: 25.75.+r ; 25.85.-w ; 27.90.+b
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract Electromagnetic fission of238U projectiles at E/A =600 and 1000 MeV was studied with the ALADIN spectrometer at the heavy-ion synchrotron SIS. Seven different targets (Be, C, Al, Cu, In, Au and U) were used. By considering only those fission events where the two charges added up to 92, most of the nuclear interactions were excluded. The nuclear contributions to the measured fission cross sections were determined by extrapolating from beryllium to the heavier targets with the concept of factorization. The obtained cross sections for electromagnetic fission are well reproduced by extended Weizsäcker-Williams calculations which include E1 and E2 excitations. The asymmetry of the fission fragments' charge distribution gives evidence for the excitation of the double giant-dipole resonance in uranium.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01295898
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  • 10
    Electronic Resource
    Electronic Resource
    On the assignment of high-spin cascades to98Rh and98Pd isotopes (1983)
    Springer
    The European physical journal 314 (1983), S. 111-116 
    Details
    ISSN: 1434-601X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract Isotopic assignment of high-spin cascades in98Rh and98Pd have unambigously been obtained by a suitable combination of the96Ru(α, xn yp) and the99Ru(d, xn yp) reactions. As a result the band headed by the 841.3 keV line was assigned to98Rh and the one headed by the 862.6 keVγ-ray has been found to belong to98Pd. In the case of98Rh the band is based on the (2+) ground state.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01411838
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