Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
Results
Showing 1 to 8 of 8 for “"Freeze tolerance"”.
-
The evolution of freeze tolerance in a historically tropical snail
… result from differences in their physiological tolerances. In the intertidal zone, marine and terrestrial environments intersect to create a unique habitat, across which physiological tolerance strongly influences range. The snail Melampus bidentatus occurs in coastal salt marshes in the western …
-
Micromanaging Freeze Tolerance: The Biogenesis and Regulation of microRNAs in Frozen Frogs
… below 0°C, the wood frog (Rana sylvatica) freezes up to 65% of its body water in extracellular ice masses, displaying no measurable brain activity, no breathing, and a flat-lined heart. Various molecular mechanisms including microRNAs, a multifunctional group of short non-coding RNAs, are …
-
Sensitivity of a LAMP Assay for Detection of the Dinoflagellate Amyloodinium ocellatum in Simulated Field Conditions and Freeze Tolerance of the Parasite
… ocellatum</em> in cultured stocks, and the freeze tolerance of tomonts was assessed to determine if frozen wild fish used as fish food can serve as a potential vector for the parasite.</p> <p>The lowest dinospore concentration that could be detected by the LAMP assay in water samples was 0.5 …
-
Regulation of pyruvate kinase and glycerol-3-phosphate dehydrogenase in the freeze tolerant goldenrod gall fly: role in polyol cryoprotectant production
… temperatures as cold as –55oC by using the freeze tolerance strategy of cold hardiness. This study examines pyruvate kinase (PK) and glycerol-3-phosphate dehydrogenase (G3PDH) that were purified from gall fly larvae acclimated to 5oC (control) and −15oC (freeze-exposed). The roles that these …
-
The Effect of Arginine Vasotocin on Cryoprotectant Production during Freezing in the Pacific Chorus Frog, Pseudacris Regilla
Freeze Tolerance is an adaptation seen amongst several species of amphibians as a way of surviving during wintering months. Use of cryoprotectants is seen in all freeze tolerant species (glucose/glycerol). Synthesis and transportation mechanisms that regulate this process are not yet fully …
-
Aquaglyceroporin Expression and Regulation in Erythrocytes From Freeze Tolerant Cope’s Gray Treefrog, <i>Hyla Chrysoscelis</i>
Cope’s gray treefrog, <i>H. chrysoscelis</i> is a freeze tolerant anuran that accumulates glycerol as a cryoprotectant during cold acclimation. Aquaporins, members of the major intrinsic protein (MIP) family of transmembrane water pores, may play an important role in the mechanism of freeze …
-
Application of insect freeze tolerant strategies to the freezing of bovine embryos
Hemolymph of Tipula trivittata larvae permits freeze tolerance of this insect due to its content of cryoprotectants and ice nucleating proteins. Spontaneous ice nucleation of the dialyzed hemolymph occurs between -5 C and -11 C up to dilutions of 1:1000. The objectives of this study were to …
-
Mechanisms of cell damage and recovery in cryopreserved freshwater protists
… post-thaw viability levels and to preserve freeze-recalcitrant organisms, components of the cryogenic process which predispose and/or subject cells to stress and injury require to be determined. In this study markers of stress and cryoinjury were identified using flow cytometry and …