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  • 1
    Series available for loan
    Series available for loan
    Pleistocene geology of the Lake Simcoe district, Ontario (1950)
    Ottawa
    Associated volumes
    Details Availability
    Call number: SR 90.0009(256)
    In: Memoir
    Type of Medium: Series available for loan
    Pages: VII, 108 S. + 6 Kt.-Beil.
    Series Statement: Memoir / Geological Survey of Canada 256
    Language: English
    Location: Lower compact magazine
    Branch Library: GFZ Library
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  • 2
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    Coexistence of Native and Introduced Perennial Grasses following Simultaneous Seeding (2005)
    Wiley
    Details
    Publication Date: 2005-05-01
    Print ISSN: 0002-1962
    Electronic ISSN: 1435-0645
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Published by Wiley
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  • 3
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    Current status and future challenges in T-cell receptor/peptide/MHC molecular dynamics simulations (2015)
    Oxford University Press
    Details
    Publication Date: 2015-11-20
    Description: The interaction between T-cell receptors (TCRs) and major histocompatibility complex (MHC)-bound epitopes is one of the most important processes in the adaptive human immune response. Several hypotheses on TCR triggering have been proposed. Many of them involve structural and dynamical adjustments in the TCR/peptide/MHC interface. Molecular Dynamics (MD) simulations are a computational technique that is used to investigate structural dynamics at atomic resolution. Such simulations are used to improve understanding of signalling on a structural level. Here we review how MD simulations of the TCR/peptide/MHC complex have given insight into immune system reactions not achievable with current experimental methods. Firstly, we summarize methods of TCR/peptide/MHC complex modelling and TCR/peptide/MHC MD trajectory analysis methods. Then we classify recently published simulations into categories and give an overview of approaches and results. We show that current studies do not come to the same conclusions about TCR/peptide/MHC interactions. This discrepancy might be caused by too small sample sizes or intrinsic differences between each interaction process. As computational power increases future studies will be able to and should have larger sample sizes, longer runtimes and additional parts of the immunological synapse included.
    Print ISSN: 1467-5463
    Electronic ISSN: 1477-4054
    Topics: Biology , Computer Science
    Published by Oxford University Press
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  • 4
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    Sleep drives metabolite clearance from the adult brain (2013)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2013-10-19
    Description: The conservation of sleep across all animal species suggests that sleep serves a vital function. We here report that sleep has a critical function in ensuring metabolic homeostasis. Using real-time assessments of tetramethylammonium diffusion and two-photon imaging in live mice, we show that natural sleep or anesthesia are associated with a 60% increase in the interstitial space, resulting in a striking increase in convective exchange of cerebrospinal fluid with interstitial fluid. In turn, convective fluxes of interstitial fluid increased the rate of beta-amyloid clearance during sleep. Thus, the restorative function of sleep may be a consequence of the enhanced removal of potentially neurotoxic waste products that accumulate in the awake central nervous system.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3880190/" target="_blank"〉〈img src="https://static.pubmed.gov/portal/portal3rc.fcgi/4089621/img/3977009" border="0"〉〈/a〉   〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3880190/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Xie, Lulu -- Kang, Hongyi -- Xu, Qiwu -- Chen, Michael J -- Liao, Yonghong -- Thiyagarajan, Meenakshisundaram -- O'Donnell, John -- Christensen, Daniel J -- Nicholson, Charles -- Iliff, Jeffrey J -- Takano, Takahiro -- Deane, Rashid -- Nedergaard, Maiken -- NS028642/NS/NINDS NIH HHS/ -- NS078167/NS/NINDS NIH HHS/ -- NS078304/NS/NINDS NIH HHS/ -- R01 DE022743/DE/NIDCR NIH HHS/ -- R01 NS075177/NS/NINDS NIH HHS/ -- R01 NS078167/NS/NINDS NIH HHS/ -- R01 NS078304/NS/NINDS NIH HHS/ -- New York, N.Y. -- Science. 2013 Oct 18;342(6156):373-7. doi: 10.1126/science.1241224.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Division of Glial Disease and Therapeutics, Center for Translational Neuromedicine, Department of Neurosurgery, University of Rochester Medical Center, Rochester, NY 14642, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/24136970" target="_blank"〉PubMed〈/a〉
    Keywords: Adrenergic Antagonists/administration & dosage ; Amyloid beta-Peptides/*metabolism ; Animals ; Brain/*metabolism/physiology ; Cerebral Cortex/metabolism/physiology ; Cerebrospinal Fluid/metabolism ; Diffusion ; Electroencephalography ; Extracellular Space ; Intracellular Space ; Male ; Mice ; Mice, Inbred C57BL ; Neurodegenerative Diseases/*metabolism ; Quaternary Ammonium Compounds/chemistry ; Receptors, Adrenergic/metabolism ; Sleep/*physiology ; Wakefulness/physiology
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
    Published by American Association for the Advancement of Science (AAAS)
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  • 5
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    Apolipoprotein E controls cerebrovascular integrity via cyclophilin A (2012)
    Nature Publishing Group (NPG)
    Details
    Publication Date: 2012-05-25
    Description: Human apolipoprotein E has three isoforms: APOE2, APOE3 and APOE4. APOE4 is a major genetic risk factor for Alzheimer's disease and is associated with Down's syndrome dementia and poor neurological outcome after traumatic brain injury and haemorrhage. Neurovascular dysfunction is present in normal APOE4 carriers and individuals with APOE4-associated disorders. In mice, lack of Apoe leads to blood-brain barrier (BBB) breakdown, whereas APOE4 increases BBB susceptibility to injury. How APOE genotype affects brain microcirculation remains elusive. Using different APOE transgenic mice, including mice with ablation and/or inhibition of cyclophilin A (CypA), here we show that expression of APOE4 and lack of murine Apoe, but not APOE2 and APOE3, leads to BBB breakdown by activating a proinflammatory CypA-nuclear factor-kappaB-matrix-metalloproteinase-9 pathway in pericytes. This, in turn, leads to neuronal uptake of multiple blood-derived neurotoxic proteins, and microvascular and cerebral blood flow reductions. We show that the vascular defects in Apoe-deficient and APOE4-expressing mice precede neuronal dysfunction and can initiate neurodegenerative changes. Astrocyte-secreted APOE3, but not APOE4, suppressed the CypA-nuclear factor-kappaB-matrix-metalloproteinase-9 pathway in pericytes through a lipoprotein receptor. Our data suggest that CypA is a key target for treating APOE4-mediated neurovascular injury and the resulting neuronal dysfunction and degeneration.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4047116/" target="_blank"〉〈img src="https://static.pubmed.gov/portal/portal3rc.fcgi/4089621/img/3977009" border="0"〉〈/a〉   〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4047116/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Bell, Robert D -- Winkler, Ethan A -- Singh, Itender -- Sagare, Abhay P -- Deane, Rashid -- Wu, Zhenhua -- Holtzman, David M -- Betsholtz, Christer -- Armulik, Annika -- Sallstrom, Jan -- Berk, Bradford C -- Zlokovic, Berislav V -- R01 AG039452/AG/NIA NIH HHS/ -- R01 NS034467/NS/NINDS NIH HHS/ -- R01AG039452/AG/NIA NIH HHS/ -- R37 AG013956/AG/NIA NIH HHS/ -- R37 AG023084/AG/NIA NIH HHS/ -- R37 NS034467/NS/NINDS NIH HHS/ -- R37AG13956/AG/NIA NIH HHS/ -- R37AG23084/AG/NIA NIH HHS/ -- R37NS34467/NS/NINDS NIH HHS/ -- England -- Nature. 2012 May 16;485(7399):512-6. doi: 10.1038/nature11087.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Center for Neurodegenerative and Vascular Brain Disorders, University of Rochester Medical Center, Rochester, New York 14642, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/22622580" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Apolipoprotein E2/deficiency/genetics/metabolism ; Apolipoprotein E3/deficiency/genetics/metabolism ; Apolipoprotein E4/deficiency/genetics/metabolism ; Apolipoproteins E/deficiency/genetics/*metabolism ; Blood-Brain Barrier/drug effects/*physiology/physiopathology ; Cerebrovascular Circulation/*physiology ; Cyclophilin A/antagonists & inhibitors/deficiency/*metabolism ; Hippocampus/metabolism/pathology ; Humans ; Matrix Metalloproteinase 9/metabolism ; Mice ; Mice, Transgenic ; Microcirculation ; NF-kappa B/metabolism ; Neurodegenerative Diseases/metabolism/pathology ; Neurons/metabolism/pathology ; Pericytes/metabolism
    Print ISSN: 0028-0836
    Electronic ISSN: 1476-4687
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Published by Nature Publishing Group (NPG)
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  • 6
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    MP-T: improving membrane protein alignment for structure prediction (2012)
    Oxford University Press
    Details
    Publication Date: 2012-12-21
    Description: Motivation: Membrane proteins are clinically relevant, yet their crystal structures are rare. Models of membrane proteins are typically built from template structures with low sequence identity to the target sequence, using a sequence-structure alignment as a blueprint. This alignment is usually made with programs designed for use on soluble proteins. Biological membranes have layers of varying hydrophobicity, and membrane proteins have different amino-acid substitution preferences from their soluble counterparts. Here we include these factors into an alignment method to improve alignments and consequently improve membrane protein models. Results: We developed Membrane Protein Threader (MP-T), a sequence-structure alignment tool for membrane proteins based on multiple sequence alignment. Alignment accuracy is tested against seven other alignment methods over 165 non-redundant alignments of membrane proteins. MP-T produces more accurate alignments than all other methods tested ( F M from +0.9 to +5.5%). Alignments generated by MP-T also lead to significantly better models than those of the best alternative alignment tool (one-fourth of models see an increase in GDT_TS of ≥4%). Availability: All source code, alignments and models are available at http://www.stats.ox.ac.uk/proteins/resources Contact: deane@stats.ox.ac.uk Supplementary information : Supplementary data are available at Bioinformatics online.
    Print ISSN: 1367-4803
    Electronic ISSN: 1460-2059
    Topics: Biology , Computer Science , Medicine
    Published by Oxford University Press
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  • 7
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    Dysregulation of brain A{beta} homeostasis by Cu [Neuroscience] (2013)
    National Academy of Sciences
    Details
    Publication Date: 2013-09-04
    Description: Whereas amyloid-β (Aβ) accumulates in the brain of normal animals dosed with low levels of copper (Cu), the mechanism is not completely known. Cu could contribute to Aβ accumulation by altering its clearance and/or its production. Because Cu homeostasis is altered in transgenic mice overexpressing Aβ precursor protein (APP), the...
    Print ISSN: 0027-8424
    Electronic ISSN: 1091-6490
    Topics: Biology , Medicine , Natural Sciences in General
    Published by National Academy of Sciences
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  • 8
    Electronic Resource
    Electronic Resource
    Otolith age validation and growth-rate variation in flyingfish (Hirundichthys affinis) from the eastern Caribbean (1994)
    Springer
    Marine biology 118 (1994), S. 585-592 
    Details
    ISSN: 1432-1793
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract A study of otolith aging and growth-rate variation in the flyingfish Hirundichthys affinis (Günther) was conducted in the eastern Caribbean (10–16°N; 58–62°W) in 1987–1989. Daily otolith-increment formation was validated in laboratory-reared larvae, confirming the usefulness of otolith-increment counts for age determination of H. affinis juveniles (〈150 mm fork length, FL). A mark-recapture programme to validate increment formation in wild adults was unsuccessful due to tetracycline-linked mortality and insufficient tetracycline uptake in slow-growing adult otoliths. A von Bertalanffy growth curve fitted to juvenile size-at-age data gave preliminary growth-curve parameters of t 0=2.85 d and k=0.00854 on a daily basis, with an asymptotic length, L∞, of 245 mm FL, for eastern Caribbean flyingfish. Juvenile growth rate in H. affinis is sensitive to spatial and temporal variation in temperature. Growth rates were higher where sea-surface temperatures were higher, and were higher for juveniles hatched in warmer months (April–July) than in colder months (November–March). Growth rates were also higher near islands than at more oceanic locations. Variation in juvenile growth rates may influence the spatial and temporal variation in spawning frequency observed in H. affinis.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00347505
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  • 9
    Electronic Resource
    Electronic Resource
    Emulsifying Properties of Low-fat, Low-cholesterol Egg Yolk Prepared by Supercritical CO2 Extraction (1996)
    Oxford, UK : Blackwell Publishing Ltd
    Journal of food science 61 (1996), S. 0 
    Details
    ISSN: 1750-3841
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition , Process Engineering, Biotechnology, Nutrition Technology
    Notes: Comparisons were made with native egg yolk, dried egg yolk and a commercial yolk substitute (soy lecithin). Aqueous emulsions were prepared by sonicating water containing 0–5% NaCl, 20% peanut oil, HC1 or NaOH as needed for pH adjustment, and 1–3% emulsifier expressed as the total of phospholipids, glycolipids and proteins contributed by yolk ingredients or soy lecithin. The median diameters of fat particles in the emulsions with and without dispersing fat droplet floes using Triton X-100, were evaluated by laser light diffraction. The emulsifying properties of low-fat, low-cholesterol egg yolk were similar to or better than those of native yolk and dried egg yolk. Soy lecithin had less effective emulsifying properties than yolk ingredients with respect to coalescence of fat droplets during storage and separation during 70°C treatment.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1365-2621.1996.tb14717.x
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  • 10
    Electronic Resource
    Electronic Resource
    Slicks on Lake Huron (1962)
    [s.l.] : Nature Publishing Group
    Nature 196 (1962), S. 1305-1306 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] In our experiments a group of small cylindrical jars, 5 cm in diameter, 8 cm high, lids painted fluorescent yellow and weighted so that the lid floats level with the surface, were released from a boat, with the intention of following their dispersion by turbulent diffusion. In the initial phase the ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/1961305b0
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