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  • temperature  (699)
  • Springer  (698)
  • La Jolla, CA  (1)
  • American Chemical Society (ACS)
  • 1
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    Seasonal Forecasts, Climatic Change and Human Health : Health and Climate (2008)
    Springer
    Details
    Keywords: Assessment ; Malaria ; Public Health ; Scale ; Weather ; climate change ; public health policy ; temperature
    Description / Table of Contents: Awareness that many key aspects of public health are strongly influenced by climate is growing dramatically, driven by new research and experience and fears of climate change and the research needed to underpin policy developments in area is growing rapidly . This awareness has yet to translate into a practical use of climate knowledge by health policy-makers. Evidence based policy and practice is the mantra of the health sector. If climate scientists are to contribute effectively to health policy at local and global scales then careful empirical studies must be undertaken – focused on the needs of the public health policy and decision-makers. Results presented at the Wengen conference make clear that the science and art of integrating climate knowledge into the control of climate sensitive diseases on a year to year time frame as well as careful assessments of the potential impacts of climate change on health outcomes over longer time frames is advancing rapidly on many fronts. This includes advances in the empirical understanding of mechanisms, methodologies for modeling future impacts, new partnership developments between the health and climate community along with access to relevant data resources, and education and training. In a rapidly evolving field this book provides a snapshot of these emerging themes.
    Pages: Online-Ressource (X, 232 pages)
    ISBN: 9781402068775
    URL: https://doi.org/10.1007/978-1-4020-6877-5
    Language: English
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    E-BOOK
  • 2
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    Unknown
    A temperature atlas of the Gulf of Panama, 1955-1959 (2021)
    Inter-American Tropical Tuna Commission | La Jolla, CA
    In:  http://aquaticcommons.org/id/eprint/3574 | 8 | 2011-09-29 17:11:08 | 3574 | Inter-American Tropical Tuna Commission
    Details
    Publication Date: 2021-06-27
    Description: The interests of the Inter-American Tropical Tuna Commission in the hydrography and biology of the Gulf of Panama have been adequately stated in the Commission's Bulletin series (Forsbergh, 1963; Howard, 1954; Howard and Landa, 1958; Peterson, 1961; Schaefer, 1953; Schaefer and Bishop, 1958; Schaefer, Bishop and Howard, 1958). The present report deals with data collected on 10 surveys made by Tuna Commission personnel for the purpose of describing seasonal upwelling by means of a study of the temperature structure of the Gulf of Panama, and a comparison of the thermal pattern during the dry, upwelling season (January to April) with that of the rainy season (May to December).Considerations of upwelling in the Gulf have been shown to be of interest and of probable biological consequence by Schaefer (1951) and by Simpson (1959). (PDF contains 60 pages.)
    Keywords: Oceanography ; temperature ; upwelling ; Gulf of Panama
    Repository Name: AquaDocs
    Type: monograph
    Format: application/pdf
    Format: application/pdf
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    PAPER (OA)
  • 3
    Electronic Resource
    Electronic Resource
    Effect of temperature on the occluding junctions of monolayers of epithelioid cells (MDCK) (1984)
    Springer
    The journal of membrane biology 79 (1984), S. 175-184 
    Details
    ISSN: 1432-1424
    Keywords: epithelial monolayers ; MDCK cells ; occluding junctions ; intramembrane particles ; electrical resistance ; temperature
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology
    Notes: Summary In previous works it was demonstrated that the monolayer of MDCK cells behaves as a leaky epithelium where the electrical resistance across reflects the sealing capacity of the occluding junction. In the present work we study whether this sealing capacity can be modified by temperature and whether this is accompanied by changes in the structure of the occluding junction. Monolayers were prepared on disks of nylon cloth coated with collagen and mounted as a flat sheet between two Lucite chambers. The changes in resistance elicited by temperature were large (306% between 3 and 37°C), fast (less than 2 sec), and reversible. An Arrhenius plot of conductance versus the inverse of temperature shows a broken curve (between 22 and 31°C), and the activation energies calculated (3.2 and 4.0 kcal·mol−1) fall within the expected values for processes of simple diffusion. The morphology of the occuluding the number of evaluated in freeze-fracture replicas by counting the number of strands and the width of the band occupied by the junction every 133 nm. In spite of the change by 306% of the electrical resistance and the phase transition, we were unable to detect any appreciable modification of the morphology of the occluding junction. Since the freeze-fracture replicas also show a density of intramembrane particles (IMP) different in the apical from that in the basolateral regions of the plasma membrane, as well as differences between faceE and faceP, we also investigated whether this is modified by temperature. Cold increases the population of IMP, but does not affect their polarization with the incubation time it takes to elicit changes in electrical resistance.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01872121
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  • 4
    Electronic Resource
    Electronic Resource
    Effects of anisosmotic medium on cell volume, transmembrane potential and intracellular K+ activity in mouse hepatocytes (1987)
    Springer
    The journal of membrane biology 100 (1987), S. 53-61 
    Details
    ISSN: 1432-1424
    Keywords: hepatocyte ; cell volume ; K+ conductance ; temperature ; quinine HCl ; intracellular K+ activity
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology
    Notes: Summary Mouse hepatocytes in primary monolayer culture (4 hr) were exposed for 10 min at 37°C to anisosmotic medium of altered NaCl concentration. Hepatocytes maintained constant relative cell volume (experimental volume/control volume) as a function of external medium relative osmolality (control mOsm/experimental mOsm), ranging from 0.8 to 1.5. In contrast, the relative cell volume fit a predicted Boyle-Van't Hoff plot when the experiment was done at 4°C. Mouse liver slices were used for electrophysiologic studies, in which hepatocyte transmembrane potential (V m ) and intracellular K+ activity (a K i ) were recorded continuously by open-tip and liquid ion-exchanger ion-sensitive glass microelectrodes, respectively. Liver slices were superfused with control and then with anisosmotic medium of altered NaCl concentration.V m increased (hyperpolarized) with hypoosmotic medium and decreased (depolarized) with hyperosmotic medium, and ln [10(experimentalV m /controlV m )] was a linear function of relative osmolality (control mOsm/experimental mOsm) in the range 0.8–1.5. Thea K i did not change when medium osmolality was decreased 40–70 mOsm from control of 280 mOsm. Similar hypoosmotic stress in the presence of either 60mm K+ or 1mm quinine HCl or at 27°C resulted in no change inV m compared with a 20-mV increase inV m without the added agents or at 37°C. We conclude that mouse hepatocytes maintain their volume anda K i in response to anisosmotic medium; however,V m behaves as an osmometer under these conditions. Also, increases inV m by hypoosmotic stress were abolished by conditions or agents that inhibit K+ conductance.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02209140
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  • 5
    Electronic Resource
    Electronic Resource
    Effects of divalent cations, temperature, osmotic pressure gradient, and vesicle curvature on phosphatidylserine vesicle fusion (1984)
    Springer
    The journal of membrane biology 77 (1984), S. 265-275 
    Details
    ISSN: 1432-1424
    Keywords: vesicle fusion ; surface energy ; divalent cations ; osmotic pressure gradient ; temperature ; membrane curvature
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology
    Notes: Summary Fusion of phosphatidylserine vesicles induced by divalent cations, temperature and osmotic pressure gradients across the membrane was studied with respect to variations in vesicle size. Vesicle fusion was followed by two different methods: 1) the Tb/DPA fusion assay, whereby the fluorescent intensity upon mixing of the internal aqueous contents of fused lipid vesicles was monitored, and 2) measurement of the changes in turbidity of the vesicle suspension due to vesicle fusion. It was found that the threshold concentration of divalent cations necessary to induce vesicle fusion depended on the size of vesicles; as the diameter of the vesicle increased, the threshold value increased and the extent of fusion became less. For the osmotic pressure-induced vesicle fusion, the larger the diameter of vesicles, the smaller was the osmotic pressure gradient required to induce membrane fusion. Divalent cations, temperature increase and vesicle membrane expansion by osmotic pressure gradient all resulted in increase in surface energy (tension) of the membrane. The degree of membrane fusion correlated with the corresponding surface energy changes of vesicle membranes due to the above fusion-inducing agents. The increase in surface energy of 9.5 dyn/cm from the reference state corresponded to the threshold point of phosphatidylserine membrane fusion. An attempt was made to explain the factors influencing fusion phenomena on the basis of a single unifying theory.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01870574
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  • 6
    Electronic Resource
    Electronic Resource
    I/V-Curve studies of the control of a K+ transporter inNitella by temperature (1987)
    Springer
    The journal of membrane biology 98 (1987), S. 1-13 
    Details
    ISSN: 1432-1424
    Keywords: control ; curve fitting ; I/V curves ; K+ transporter ; Nitella ; lazy state ; reaction-kinetic model ; temperature
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology
    Notes: Summary InNitella, current-voltage relationships were measured at different temperatures ranging from 5 to 25°C. Sets of theseI/V curves were subject to curve fitting on the basis of a cyclic reaction scheme (Class I model). Different hypotheses of the mode of action of temperature on theI/V curve were tested, including changes in reaction constants in the transport cycle and deactivation of transport molecules. It was found that models assuming an influence of temperature on pairs of rate constants of the transport cycle gave very bad fits. Good fits were obtained with models implying that temperature influences the number of active transporters. The lazy-state model (the exchange of an inactive state with a stateN 3 in the transport cycle is influenced by temperature) gave a slightly better fit than the assumption of an unspecific inactivation (independent of the state of the transport molecule). According to the lazy-state analysis, the inactive state is kinetically closer toN o , the state in which the transport molecule is open to the outside substrate than toN i , the state in which it is open to the inside substrate. The two inactivation models imply that temperature does not act directly on the properties of the plasmamembrane, but that temperature-sensitive metabolic processes in the cell send signals which control the activation and deactivation of the transporter.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01871041
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  • 7
    Electronic Resource
    Electronic Resource
    Temperature dependence of gating current in myelinated nerve fibers (1989)
    Springer
    The journal of membrane biology 112 (1989), S. 277-289 
    Details
    ISSN: 1432-1424
    Keywords: myelinated nerve fiber ; gating current ; temperature
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology
    Notes: Summary Asymmetrical displacement currents and Na currents of single myelinated nerve fibers ofXenopus laevis were studied in the temperature range from 5 to 24°C. The time constant of the on-response atE=4 mV,τ on, was strongly temperature dependent, whereas the amount of displaced charge atE=39 mV, Qon, was only slightly temperature dependent. The mean Q10 forτ on -1 was 2.54, the mean Q10 for Qon was 1.07. The time constant of charge immobilization,τ i , atE=4 mV varied significantly (α=0.001) with temperature. The mean Q10 forτ i -1 was 2.71±0.38. The time constants of immobilization of gating charge and of fast inactivation of Na permeability were similar in the temperature range from 6 to 22°C. The Qoff/Qon ratio forE=4 mV pulses of 0.5 msec duration decreased with increasing temperature. The temperature dependence of the time constant of the off-response could not be described by a single Q10 value, since the Q10 depended on the duration of the test pulse. Increasing temperature shifted Qon (E) curves to more negative potentials by 0.51 mVK −1, but shiftedP Na (E) curves andh ∞ (E) curves to more positive potentials by 0.43 and 0.57 mV K−1, respectively.h ∞ (E=−70 mV) increased monotonously with increasing temperature. The present data indicate that considerable entropy changes may occur when the Na channel molecule passes from closed through open to inactivated states.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01870958
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  • 8
    Electronic Resource
    Electronic Resource
    Outwardly rectifying chloride channels in lymphocytes (1992)
    Springer
    The journal of membrane biology 127 (1992), S. 49-56 
    Details
    ISSN: 1432-1424
    Keywords: chloride channel ; lymphocyte ; outward rectification ; temperature ; regulation
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology
    Notes: Summary Outwardly rectifying Cl− channels in cultured human Jurkat T-lymphocytes were activated by excising a patch of membrane using the inside-out (i/o) patch-clamp configuration and holding at depolarized voltages for prolonged periods of time (1–6 min at +80 mV, 20°C). The single-channel current at +80 mV was 4.5 ± 0.3 pA and at −80 mV, it was 1.0 ± 0.4 pA. After activation, the probability of being open (P 0)for the lymphocyte channel was voltage independent. Activation of the Cl− channel in lymphocytes was temperature dependent. Nineteen percent of i/o recordings from lymphocytes made at 20°C exhibited Cl− channel activity. In contrast, 49% of recordings made at 30°C showed channel activity. The number of channels in an active patch was not significantly different at the two temperatures. Channel activation in excised, depolarized patches also occurred 20-fold faster at 30°C than at 20°C. There was no marked change in the single-channel conductance at 30°C. Open-channel conductance was blocked by 200 μm indanyloxyacetic acid (IAA) or 1 mm SITS when applied to the intracellular side of the patch. The characteristics of this channel are similar to epithelial outwardly rectifying Cl− channels thought to be involved in fluid secretion
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00232757
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  • 9
    Electronic Resource
    Electronic Resource
    Cl− channels in intact human T lymphocytes (1992)
    Springer
    The journal of membrane biology 125 (1992), S. 171 
    Details
    ISSN: 1432-1424
    Keywords: chloride channel ; cell-attached patches ; lymphocyte ; T cell ; temperature ; voltage dependence
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology
    Notes: Summary We recently described a large, multiple-conductance Cl− channel in excised patches from normal T lymphocytes. The properties of this channel in excised patches are similar to maxiCl− channels found in a number of cell types. The voltage dependence in excised patches permitted opening only at nonphysiological voltages, and channel activity was rarely seen in cell-attached patches. In the present study, we show that Cl− channels can be activated in intact cells at physiological temperatures and voltages and that channel properties change after patch excision. Maxi-Cl− channels were reversibly activated in 69% of cellattached patches when the temperature was above 32°C, whereas fewer than 2% of patches showed activity at room temperature. Upon excision, the same patches displayed large, multiple-conductance Cl− channels with characteristics like those we previously reported for excised patches. After patch excision, warm temperatures were not essential to allow channel activity; 37% (114/308) of inside-out patches had active channels at room temperature. The voltage dependence of the channels was markedly different in cell-attached recordings compared with excised patches. In cell-attached patches, Cl− channels could be open at cell resting potentials in the normal range. Channel activation was not related to changes in intracellular Ca2+ since neither ionomycin nor mitogens activated the channels in cell-attached patches, Ca2+ did not rise in response to warming and the Cl− channel was independent of Ca2+ in inside-out patches. Singlechannel currents were blocked by internal or external Zn2+ (100–200 μm), 4-acetamido-4′ isothiocyanostilbene-2,2′-disulfonate (SITS, 100–500 μm) and 4,4′-diisothiocyanostilbene 2,2′disulfonate (DIDS, 100 μm). NPPB (5-nitro-2-(3-phenylpropylamino)-benzoate) reversibly blocked the channels in inside-out patches.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00233356
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  • 10
    Electronic Resource
    Electronic Resource
    Efficiency, Na+/K+ selectivity and temperature dependence of ion transport through lipid membranes by (221)C10-Cryptand, an ionizable mobile carrier (1987)
    Springer
    The journal of membrane biology 97 (1987), S. 79-95 
    Details
    ISSN: 1432-1424
    Keywords: cryptand ; Na+ selectivity ; temperature ; ionizable mobile carrier ; nonactin ; cation transport kinetics ; lipid membrane
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology
    Notes: Summary The kinetics of Na+ and K+ transport across the membrane of large unilamellar vesicles (LUV) were determined at two pH's when transport was induced by (221)C10-cryptand (diaza-1,10-decyl-5-pentaoxa-4,7,13,16,21-bicyclo [8.8.5.] tricosane) at various temperatures, and by nonactin at 25°C and (222)C10-cryptand at 20 and 25°C. The rate of Na+ and K+ transport by (221)C10 saturated with the cation and carrier concentrations. Transport was noncooperative and exhibited selectivity for Na+ with respect to K+. The apparent affinity of (221)C10 for Na+ was higher and less pH-dependent than that for K+, and seven times higher than that of (222)C10 for K+ ions (20.5vs. 1.7 kcal·mole−). The efficiency of (221)C10 transport of Na+ was pH-and carrier concentration-dependent, and was similar to that of nonactin; its activation energy was similar to that for (222)C10 transport of K+ (35.5 and 29.7 kcal · mole−1, respectively). The reaction orders in cationn(S) and in carrierm(M), respectively, increased and decreased as the temperature rose, and were both independent of carrier or cation concentrations; in most cases they varied slightly with the pH.n(S) varied with the cation at pH 8.7 and with the carrier for Na+ transport only, whilem(M) always depended on the type of cation and carrier. Results are discussed in terms of the structural, physico-chemical and electrical characteristics of carriers and complexes.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01869415
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