ALBERT

All Library Books, journals and Electronic Records Telegrafenberg

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
    facet.materialart.
    Unknown
    PREFCLIM: A high-resolution mixed-layer climatology of the eastern tropical Atlantic (2016)
    PANGAEA
    Details
    Publication Date: 2023-05-05
    Description: PREFCLIM is a mixed-layer climatology for the Eastern Tropical Atlantic. The climatology contains a high-resolution (0.25 degrees) monthly-mean mixed-layer hydrography (mixed-layer depth, temperature, salinity), and coarse-resolution (2.5 degrees) estimates of the mixed-layer heat and salt balance, as well as of near-surface velocities and of air-sea fluxes. All existing hydrographic products of the region were hampered by the sparse availability of near-shore data owned by the West-African coastal countries, which could, however, be included in the new climatology.
    Keywords: File content; File format; File name; File size; Model; PREFCLIM; Uniform resource locator/link to file
    Type: Dataset
    Format: text/tab-separated-values, 24 data points
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    DATA PANGAEA
  • 2
    Electronic Resource
    Electronic Resource
    Large-scale analysis of the yeast genome by transposon tagging and gene disruption (1999)
    [s.l.] : Macmillian Magazines Ltd.
    Nature 402 (1999), S. 413-418 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] Economical methods by which gene function may be analysed on a genomic scale are relatively scarce. To fill this need, we have developed a transposon-tagging strategy for the genome-wide analysis of disruption phenotypes, gene expression and protein localization, and have applied this method to ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/46558
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 3
    Electronic Resource
    Electronic Resource
    Characterization and In Vivo Studies of Nanothickness Ca- and P-Based Coatings (2007)
    s.l. ; Stafa-Zurich, Switzerland
    Key engineering materials Vol. 361-363 (Nov. 2007), p. 649-652 
    Details
    ISSN: 1013-9826
    Source: Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Objective: This series of laboratorial and in-vivo studies describe the characterization,evolution, and in-vivo performance of various Ca- and P-based nanothicknesses and microstructuresion beam assisted depositions (IBAD) onto Ti-6Al-4V implants. Materials and Methods:Characterization- The 4 mm in diameter and 10 mm in length implant rods (Ti-6Al-4V) with IBADI, IBAD II, and control (alumina-blasted/acid-etched, AB/AE) surfaces were provided by animplant manufacturer. The in-vitro characterization comprised the following techniques: (1)SEM/EDS, (2) XPS/Depth Profiling (3) Thin-film XRD (4) AFM + ToF-SIMS for coatingthickness determination (5) AFM- Ra determination. In-vivo- Three animal experiments werecarried out for evaluation of the nanothickness bioceramic coatings. All experiments comprised aproximal tibia model with 4-6 implants placed along the bones. Times in-vivo ranged from 2-5weeks. Static (bioactivity, bone to implant contact) and dynamic (mineral apposition rates- MAR)histomorphometric measurements were recorded. Biomechanical testing was performed by pulloutand torque to interfacial failure testing. Results: Combination of the characterization techniquesshowed that all bioceramic coatings were Ca- and P-based bioceramics of amorphousmicrostructure. AFM +ToF-SIMS showed that IBAD II coatings were thicker (300-500 nm)compared to IBAD I coatings (30-50 nm). Surface roughness did not change significantly for theIBAD implant groups compared to control. The in-vivo results showed higher degrees ofosseoactivity, torque to failure, and MAR for the coated implants at different times in-vivo. IBAD IIhad higher biomechanical fixation at early implantation times compared to other groups.Conclusions: The results obtained in the in-vitro part this study support that both IBAD I and IBADII coatings are Ca- and P- based amorphous bioceramics in the nanothickness range with theoreticalhigh dissolution rates. The increased osseoactivity observed for IBAD coated and the high MARvalues observed for IBAD coated compared to AB/AE implants support the effect of the bioceramiccoating presence in the overall bone healing. A thickness effect was reveled through biomechanicaltesting where IBAD II (300-500nm thickness) presented higher performance
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/01/56/transtech_doi~10.4028%252Fwww.scientific.net%252FKEM.361-363.649.pdf
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 4
    Electronic Resource
    Electronic Resource
    Histomorphometrical Comparison of Alumina-Blasted/Acid-Etched and a Thin Ion Beam Deposited Bioceramic Surfaces at Early Implantation Times. An Experimental Study in Dogs (2008)
    s.l. ; Stafa-Zurich, Switzerland
    Key engineering materials Vol. 396-398 (Oct. 2008), p. 327-330 
    Details
    ISSN: 1013-9826
    Source: Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Among surface modifications commercially available for dental implants, the incorporation of bioceramic coatings is one of the most popular. However, concerns regarding the effectiveness of the bond between the metallic surface and the coating have led to the development of thin-film Ca- and P- based bioceramic coatings. The purpose of this study was to evaluate the early bone response to a thin ion bean deposited (Test) bioceramic implant surface compared to an alumina-blasted/acid-etched (Control) surface in a canine model. Results showed that although no difference in bone-to-implant (BIC) could be noted between the two different surfaces, more organized bone architecture was present around the Test implants in 4 weeks. Based on this observation, the incorporation of a thin- film bioceramic coating positively influenced bone healing around dental implants at early times
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/01/58/transtech_doi~10.4028%252Fwww.scientific.net%252FKEM.396-398.327.pdf
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 5
    Electronic Resource
    Electronic Resource
    Cytotoxicity and Adhesion Evaluation of Nanothickness Ca/P-Based Bioceramics Coated Titanium (2008)
    s.l. ; Stafa-Zurich, Switzerland
    Key engineering materials Vol. 396-398 (Oct. 2008), p. 319-322 
    Details
    ISSN: 1013-9826
    Source: Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Incorporation of bioceramics on the surface of dental implants has been utilized in an attempt to increase biological response of bone to materials. This paper reports the in vitro biological evaluation of Ca/P-based nanothickness bioceramic coated alumina-blasted/acid-etched titanium implants (AB/AE nanotite implant) and compare its performance to the untreated and uncoated implants, Ca/P-based nanothickness bioceramic coated untreated implants (untreated nanotite implant), alumina-blasted/acid-etched titanium implants (AB/AE implant) and hydroxyapatite plasma-sprayed implants (PSHA Implant). Balb/c 3T3 fibroblasts were used to asses the cytocompatibility of implant materials according to ISO-10993-5 protocols. Osteoblasts from Balb/c femurs seeded onto different implant surfaces showed the effect of surface topography and chemistry on cell adhesion. The results showed that all implants were not cytotoxic and that PSHA and AB/AE nanotite implants favored osteoblasts adhesion
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/01/58/transtech_doi~10.4028%252Fwww.scientific.net%252FKEM.396-398.319.pdf
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 6
    Electronic Resource
    Electronic Resource
    The Effect of Bioceramic Surface Modifications on Different Endosseous Implant and Surgical Design. A Series of 〈i〉In Vivo 〈/i〉Studies in Dogs (2008)
    s.l. ; Stafa-Zurich, Switzerland
    Key engineering materials Vol. 396-398 (Oct. 2008), p. 385-388 
    Details
    ISSN: 1013-9826
    Source: Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: The objective of this series of experiments was to evaluate the effect of bioceramiccoatings/ incorporations on implant surfaces as a function of implant and surgical drilling design.Methods: A series of four in vivo studies were conducted utilizing the dog proximal tibia model.The models provided implants that remained from 2 to 5 weeks implantation time. The differentstudies comprised the placement of implants with intimate contact with bone following placementand implant designs that resulted in healing chambers. The various implant types presented surfaceswith and without Ca- and P-based bioceramic incorporations. Biomechanical andhistomorphometric measurements along with qualitative bone-implant interface morphologyevaluation were performed. For all studies, one-way ANOVA at 95% level of significance wasemployed along with Tukey's post-hoc multiple comparisons. Results: Close contact betweencortical and trabecular bone and all the different implant surfaces irrespective of implant fit (withand without healing chambers) showed that all surfaces were biocompatible and osteoconductive. Ingeneral, appositional bone healing was observed at all implant regions that were in intimate contactwith bone immediately after placement, and an intramembranous-like healing occurred throughoutthe whole volume of the healing chambers. Irrespective of implant + surgical drilling design, thepresence of Ca and P resulted in a bone morphology that showed primary osteonic structures atearlier times than uncoated surfaces. Conclusion: Irrespective of implant design and surgicaldrilling combination, the presence of Ca and P on the implant surface positively modulated earlyhealing around endosseous implants
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/01/58/transtech_doi~10.4028%252Fwww.scientific.net%252FKEM.396-398.385.pdf
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 7
    Electronic Resource
    Electronic Resource
    Ceramic Bonding to Biocompatible Titanium Alloys Obtained by Powder Metallurgy (2006)
    s.l. ; Stafa-Zurich, Switzerland
    Materials science forum Vol. 530-531 (Nov. 2006), p. 605-611 
    Details
    ISSN: 1662-9752
    Source: Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: The shear bond strength between a ceramic material (Titankeramik®, Vita Zahnfabrik,Germany) and two biocompatible titanium alloys was investigated. Ti-13%Nb-13%Zr (TNZ) andTi-35%Nb-7%Zr-5%Ta (TNZT) alloys were obtained based on the blended elemental techniquefollowed by a sequence of cold uniaxial and isostatic pressing and sintering. Characterizationinvolved microstructural analysis (SEM) and crystalline phase identification (XRD).Subsequently, samples were machined to 4 x 4 mm with a base of 5 x 1 mm. The base metalswere blasted with Al2O3 particles followed by the application of a coupling agent and opaqueceramic. After ceramic firing, the specimens were loaded in a universal testing machine(0,5mm/min). XRD revealed the presence of α and β-phases for TNZ, and peaks related to βphases and Nb and Ta for the TNZT alloy. SEM evaluation (TNZ) depicted remaining pores andbiphasic microstructure formation. SEM micrographs of the TNZT alloy revealed gooddensification and a homogeneous β structure. Shear bond strength data (MPa) were statisticallyanalyzed (one-way ANOVA and Tukey test, α=.05) revealing that TNZT (37.6 ± 2.91) presentedsignificant higher values (p=0.0002) compared to TNZ (26.03 ± 2.92). In conclusion, it seemsthat Ti alloy composition plays a significant role on ceramic bonding
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/02/14/transtech_doi~10.4028%252Fwww.scientific.net%252FMSF.530-531.605.pdf
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 8
    Electronic Resource
    Electronic Resource
    〈i〉In Vitro〈/i〉 Characterization (2008)
    s.l. ; Stafa-Zurich, Switzerland
    Key engineering materials Vol. 396-398 (Oct. 2008), p. 23-26 
    Details
    ISSN: 1013-9826
    Source: Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: The objective of this study was to physico/chemically characterize a commercially available and a newly developed Bioglass and also to evaluate their degradation properties. Materials and Method: Two bioresorbable glasses were utilized, a bioglass synthesized at Chemical Engineering College (University of São Paulo, Lorena, São Paulo) (BG1), and the other bioglass utilized was Biogran (BG2) (3i Implant Innovations, Brazil). Particles size distribution histograms were developed for both materials, and then they were characterized by Scanning Electron Microscopy (SEM), X-ray diffraction (XRD) and Fourier Transform Infrared (FTIR) before and after immersion in simulated body fluid (SBF) for 30, 60, and 90 days. Results: The particle size distribution showed that the mean particle diameters at 10%, 50%, and 90% of the total volume were 17.65, 66.18, and 114.71 µm for BG1, and 354.54, 437.5, 525.00 µm for BG2. SEM images of BG1 showed that the as-received material had a rough surface and as the time of degradation elapsed, this surface became smooth. The images of BG2 showed that the as-received material also had a rough surface, and after immersion in SBF, the material’s crystalline content/morphology could be observed. The X-ray diffraction recorded that BG1 showed a silica peak, not seen at BG2. FTIR revealed that both bioglasses were of similar composition, except for the CO3-carbonate minor peak, present at the BG2 sample. Conclusions: 1. The particle size distribution showed a polydispersed pattern for both materials. 2. The material suffered degradation, and the decomposition increased as a function of immersion in SBF. 3. Both bioglasses had similar composition
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/01/57/transtech_doi~10.4028%252Fwww.scientific.net%252FKEM.396-398.23.pdf
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 9
    facet.materialart.
    Unknown
    Dinámica del fitoplancton y la variabilidad del clima en las costas de Angola. (2019)
    Details
    Publication Date: 2021-05-19
    Description: El florecimiento de microalgas (fitoplancton) que a menudo pueden ser tóxicas puede aumentar con los efectos del cambio climático. En el presente trabajo se analizaron los datos recogidos del fitoplancton en el período 2005-2015 para evaluar su impacto en la dinámica de las especies de las sardinas (Sardinella maderensis y Sardinella aurita). La comunidad de fitoplancton está dominada por el grupo de las diatomeas, en la superficie que coincide con las áreas de agregación de la sardina durante el día. A pesar del predominio de diatomeas los años más fríos de la costa registraran el aumento de la proporción de los dinoflagelados. Las floraciones masivas de dinoflagelados producen en la estación fría o transición del dos temporadas del año dominadas por especies Tripos furca y Prorocentrum micans. En los años más fríos se produjo un aumento en la proporción de dinoflagelados y las especies de la sardina tiene un factor de baja condición.
    Description: Microalgae blooming (phytoplankton) that often can be toxic could increase with the effects of climatic change. In this work, data picked up from phytoplankton in the 2005-2015 period were analyzed to evaluate their impact in the dynamics of the sardine species (Sardinella maderensis and Sardinella aura). Phytoplankton community is dominated by the diatom group, in the surface that coincides with sardine aggregation areas during the day. In spite of the diatom prevalence, the coldest years in the coast registered an increase in dinoflagellate proportion. Massive dinoflagellate blooming takes place in the cold station or the yearly twoseason transition dominated by Tripos furca and Prorocentrum micans species. An increase took place in dinoflagellate proportion in the coldest years and the sardine species have a low condition factor.
    Description: Published
    Keywords: Variabilidad ; Dinámica ; Temperatura ; Fitoplancton ; Diatomeas ; Dynamics ; Variability ; Temperature ; Phytoplankton ; Diatoms
    Repository Name: AquaDocs
    Type: Journal Contribution , Refereed
    Format: pp.9-12
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    PAPER (OA)
  • 10
    facet.materialart.
    Unknown
    Synchrotron X-ray imaging via ultra-small-angle scattering: principles of quantitative analysis and application in studying bone integration to synthetic grafting materials (2009)
    Springer
    Details
    Publication Date: 2009-09-27
    Print ISSN: 0175-7571
    Electronic ISSN: 1432-1017
    Topics: Biology , Physics
    Published by Springer
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    PAPER CURRENT
Close ⊗
This website uses cookies and the analysis tool Matomo. More information can be found here...