Academic literature on the topic 'Bufo marinus'

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Journal articles on the topic "Bufo marinus"

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Trejos, A. "Cromoblastomicosis Experimental en Bufo marinus." Revista de Biología Tropical 1, no. 1 (November 25, 2013): 39. http://dx.doi.org/10.15517/rbt.v1i1.12514.

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Batistic, Radenka F., Flavio A. Baldissera, and Célio F. B. Haddad. "Cytotaxonomic considerations with the description of two new NOR locations for South American toads, genus Bufo (Anura: Bufonidae)." Amphibia-Reptilia 20, no. 4 (1999): 413–20. http://dx.doi.org/10.1163/156853899x00457.

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AbstractCytogenetic studies were made on Brazilian Bufo: B. marinus, B. paracnemis, B. ictericus, B. rufus, B. arenarum, B. crucifer, Bufo granulosus, B. pygmaeus and B. margaritifer (= B. typhonius). All these species had a typical karyotype of 2n = 22. Species from the marinus and crucifer groups had NORs on Chromosome 7, species from the granulosus group had NORs on Chromosome 5, and B. margaritifer had NORs on Chromosome 10. The last two locations of NORs are described for the first time for the genus Bufo in South America.
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Sillman, A. J. "Extraction and characterization of the blue-sensitive visual pigment of the toad Bufo marinus." Canadian Journal of Zoology 65, no. 4 (April 1, 1987): 884–87. http://dx.doi.org/10.1139/z87-141.

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The blue-sensitive visual pigment of the green rods of Bufo marinus was extracted with digitonin. The pigment is present in an amount equal to about 11% that of rhodopsin. It is based on vitamin A1 and exhibits a maximum absorbance of 433 nm. The pigment is labile and readily destroyed by hydroxylamine, regenerates to a much greater degree than does rhodopsin, and is more effectively extracted from the membrane than is rhodopsin. The green rod pigment of Bufo marinus appears to share the same physical and chemical properties as the green rod pigments of other amphibians. Therefore, the results of electrophysiological studies on the green rods of Bufo marinus can be more confidently generalized to other species. The results are discussed in terms of the blue phototaxis that is characteristic of many amphibians.
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Evans, Murray, and Margarita Lampo. "Diet of Bufo marinus in Venezuela." Journal of Herpetology 30, no. 1 (March 1996): 73. http://dx.doi.org/10.2307/1564710.

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Taylor, P. M., and M. J. Tyler. "Pepsin in the toad Bufo marinus." Comparative Biochemistry and Physiology Part A: Physiology 84, no. 4 (January 1986): 669–72. http://dx.doi.org/10.1016/0300-9629(86)90384-1.

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Sievert, Lynnette M. "Thermoregulatory behaviour in the toads Bufo marinus and Bufo cognatus." Journal of Thermal Biology 16, no. 5 (September 1991): 309–12. http://dx.doi.org/10.1016/0306-4565(91)90023-u.

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ALA-LAURILA, PETRI, PIA SAARINEN, RAULI ALBERT, ARI KOSKELAINEN, and KRISTIAN DONNER. "Temperature effects on spectral properties of red and green rods in toad retina." Visual Neuroscience 19, no. 6 (November 2002): 781–92. http://dx.doi.org/10.1017/s0952523802196088.

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Temperature effects on spectral properties of the two types of rod photoreceptors in toad retina, “red” and “green” rods, were studied in the range 0–38°C. Absorbance spectra of the visual pigments were recorded by single-cell microspectrophotometry (MSP) and spectral sensitivities of red rods were measured by electroretinogram (ERG) recording across the isolated retina. The red-rod visual pigment is a usual rhodopsin (λmax = 503.6 nm and 502.3 nm at room temperature (21°C) in, respectively, Bufo marinus and Bufo bufo), that of green rods (λmax = 432.6 nm in Bufo marinus) belongs to the “blue” cone pigment family. In red rods, λmax depended inversely and monotonically on temperature, shifting by −2.3 nm when temperature was raised from 0°C to 38°C. Green-rod λmax showed no measurable dependence on temperature. In red rods, warming caused a relative increase of sensitivity in the long-wavelength range. This effect can be used for estimating the energy needed for photoexcitation, giving Ea = 44.3 ± 0.6 kcal/mol for Bufo marinus rhodopsin and 48.8 ± 0.5 kcal/mol for Bufo bufo rhodopsin. The values are significantly different (P < 0.001), although the two rhodopsins have very similar absorption spectra and thermal isomerization rates. Our recording techniques did not allow measurement of the corresponding effect at long wavelengths in green rods. Although spectral effects of temperature changes in the physiological range are small and of little significance for visual function, they reveal information about the energy states and different spectral tuning mechanisms of the visual pigments.
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Lawler, Karen L., and Jean-Marc Hero. "Palatability of Bufo marinus Tadpoles to a Predatory Fish Decreases with Development." Wildlife Research 24, no. 3 (1997): 327. http://dx.doi.org/10.1071/wr96089.

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This investigation showed an ontogenetic shift in the palatability of Bufo marinus tadpoles by measuring consumption of tadpoles at three different developmental stages (newly hatched, intermediate and pre- metamorphic) by an Australian predatory fish, Lates calcarifer (barramundi). A known-palatable tadpole, Limnodynastes ornatus, was used as the control. B. marinus tadpoles at all developmental stages were unpalatable relative to a palatable alternative, with the later stages being the least palatable. Choice experiments further demonstrated that L. calcarifer were able to recognise and choose L. ornatus tadpoles in preference to those of B. marinus. Our experiments demonstrate that at all stages of development, B. marinus tadpoles were unpalatable to L. calcarifer. Contrary to the model proposed by Brodie and Formanowicz (1987), our results suggest an ontogenetic shift in palatability of B. marinus tadpoles to a vertebrate fish predator, with the later stages being less palatable.
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West, NH, and AW Smits. "Cardiac output in conscious toads (Bufo marinus)." Journal of Experimental Biology 186, no. 1 (January 1, 1994): 315–23. http://dx.doi.org/10.1242/jeb.186.1.315.

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Suedmeyer, Wm Kirk, Donald S. Gillespie, and Lanny Pace. "Chromomycosis in a Marine Toad, Bufo marinus." Bulletin of the Association of Reptilian and Amphibian Veterinarians 7, no. 3 (January 1997): 13–15. http://dx.doi.org/10.5818/1076-3139.7.3.13.

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Dissertations / Theses on the topic "Bufo marinus"

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Phillips, Ben L. "Evolution and impact of invasive species cane toads and snakes in Australia /." Connect to full text, 2004. http://hdl.handle.net/2123/611.

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Thesis (Ph. D.)--University of Sydney, 2005.
Title from title screen (viewed 20 May 2008). Submitted in fulfilment of the requirements for the degree of Doctor of Philosophy to the School of Biological Sciences, Faculty of Science. Degree awarded 2005; thesis submitted 2004. Includes bibliographical references. Also available in print form.
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Wah, Michael San Yan. "Muscle fibre types in Queensland toad Bufo marinus." Thesis, The University of Sydney, 1990. https://hdl.handle.net/2123/26347.

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Monoclonal employed antibodies against to investigate the various myosins have been employed to investigate the muscle fibre types in limb and tongue muscles of the Queensland cane toad Bufomarinus. The results of experiments using immunocytochemical techniques suggest that these antibodies can detect twitch fibres of types 1 - 3 as well as slow-graded fibres of type 4. 5 as established by Smith and' Ovalle (1973) in the limb muscles of Xenopus laevis. Evidence is presented to suggest that twitch fibres may contain more than one type of myosin in a single fibre. In addition, limb muscles showed seasonal variation in immunocytochemical staining patterns which could be explained by synthesis of type 2 myosin in type 1 fibres. In young toads, a difference in immunocytochemical reactivity of fibres compared with mature toads was found, suggesting the possible existence of foetal myosin in type 1 fibres in these animals. In addition to this, there is a progressive increase of type 2 myosin synthesises in type 1 fibres as the young toads mature to adulthood. Immunocytochemical data also suggest that tongue muscle fibres can be classified into types 1-3 as in twitch limb muscles. In the hyoglossus muscle, a population of fibres displays a staining pattern not found in the limb muscles, suggesting the existence of a unique type of myosin in these fibres.
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Hao, Jingping. "The electrical properties of Bufo marinus Na⁺, K⁺-ATPase." Ohio : Ohio University, 2009. http://www.ohiolink.edu/etd/view.cgi?ohiou1258151062.

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Clerke, Robert Bruce. "The ecology of the cane toad, Bufo marinus, on the Darling Downs of Southern Queensland and the prospects of further range expansion within the Murray-Darling River Catchment." Thesis, Queensland University of Technology, 1995.

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McLeod, Janet Leigh, and janet mcleod@deakin edu au. "The natriuretic peptides and their receptors in the brain of the amphibian, Bufo marinus." Deakin University. School of Biological and Chemical Sciences, 1999. http://tux.lib.deakin.edu.au./adt-VDU/public/adt-VDU20071024.112730.

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The natriuretic peptides, atrial natriuretic peptide (ANP), brain natriuretic peptide (BNP) and C-type natriuretic peptide (CNP) are members of a family of hormones that play an important role in mammalian fluid and electrolyte balance. In the periphery, natriuretic peptides reduce blood volume and subsequently blood pressure by increasing renal natriuresis and diuresis and relaxation of vascular smooth muscle. The actions of natriuretic peptides are mediated via two membrane-linked guanylate cyclase receptors (NPR-GC); natriuretic peptide receptor-A (NPR-A) which has a high affinity for ANP and BNP; and natriuretic peptide receptor-B (NPR-B)which has the greatest affinity for CNP. A third receptor not linked to guanylate cyclase, natriuretic peptide receptor-C (NPR-C) also exists, which binds to ANP, BNP and CNP with a relatively equal affinity, and is involved with clearance of the peptides from the circulation and tissues. The natriuretic peptides are present in the brain and are particularly predominant in cardiovascular and fluid and electrolyte regulating areas such as the anteroventral third ventricle (AV3V) region. This distribution has led to the suggestion natriuretic peptides play a neuromodulatory role in the central control of fluid homeostasis. Natriuretic peptides in the brain have been observed to inhibit the release of other fluid and electrolyte regulating hormones such as arginine vasopressin (AVP) and angiotensin II (AII). Natriuretic peptides have also been identified in the non-mammalian vertebrates although information regarding the distribution of the peptides and their receptors in the non-mammalian brain is limited. In amphibians, immunohistochemical studies have shown that natriuretic peptides are highly concentrated in the preoptic region of the brain, an area believed to be analogous to the A\T3\ region in mammals, which suggests that natriuretic peptides may also be involved in central fluid and electrolyte regulation in amphibians. To date, CNP is the only natriuretic peptide that has been isolated and cloned from the lower vertebrate brain, although studies on the distribution of CNP binding sites in the brain have only been performed in one fish species. Studies on the distribution of ANP binding sites in the lower vertebrate brain are similarly limited and have only been performed in one fish and two amphibian species. Moreover, the nature and distribution of the natriuretic peptide receptors has not been characterised. The current study therefore, used several approaches to investigate the distribution of natriuretic peptides and their receptors in the brain of the amphibian Bufo marinus. The topographical relationship of natriuretic peptides and the fluid and electrolyte regulating hormone arginine vasotocin was also investigated, in order to gain a greater understanding of the role of the natriuretic peptide system in the lower vertebrate brain. Immunohistochemical studies showed natriuretic peptides were distributed throughout the brain and were highly concentrated in the preoptic region and interpeduncular nucleus. No natriuretic peptide-like immunoreactivity (NP-IR) was observed in the pituitary gland. Arginine vasotocin-like immunoreactivity (AvT-IR) was confined to distinct regions, particularly in the preoptic/hypothalamic region and pituitary gland. Double labelling studies of NP-JR and AvT-IR showed the peptides are not colocalised in the same neural pathways. The distribution of natriuretic peptide binding sites using the ligands 125I-rat ANP (125I-rANP) and 125I-porcine CNP (125I-pCNP) showed different distributions in the brain of B. marinus. The specificity of binding was determined by displacement with unlabelled rat ANP, porcine CNP and C-ANF, an NPR-C specific ligand. 125I-rANP binding sites were broadly distributed throughout the brain with the highest concentration in pituitary gland, habenular, medial pallium and olfactory region. Minimal 125I-rANP binding was observed in the preoptic region. Residual 125I-rANP binding in the presence of C-ANF was observed in the olfactory region, habenular and pituitary gland indicating the presence of both NPR-GC and NPR-C in these regions. 125I-pCNP binding was limited to the olfactory region, pallium and posterior pituitary gland. All 125I-pCNP binding was displaced by C-ANF which suggests that CNP in the brain of B. marinus binds only to NPR-C. Affinity cross-linking and SDS-PAGB demonstrated two binding sites at 136 kDa and 65 kDa under reducing conditions. Guanylate cyclase assays showed 0.1 µM ANP increased cGMP levels 50% above basal whilst a 10-fold higher concentration of CNP was required to produce the same result. Molecular cloning studies revealed a 669 base pair fragment showing 91% homology with human and rat NPR-A and 89% homology with human, rat and eel NPR-B. A 432 base pair fragment showing 67% homology to the mammalian NPR-C and 58% homology with eel NPR-D was also obtained. The results show natriuretic peptides and their receptors are distributed throughout the brain of B. marinus which indicates that natriuretic peptides may participate in a range of regulatory functions throughout the brain. The potential for natriuretic peptides to regulate the release of the fluid and electrolyte regulating hormone AVT also exists due to the high number of natriuretic peptide binding sites in the posterior pituitary gland. At least two populations of natriuretic peptide receptors are present in the brain of B. marinus, one linked to guanylate cyclase and one resembling the mammalian clearance receptor. Furthermore, autoradiography and guanylate cyclase studies suggest ANP may be the major ligand in the brain of B. marinus, even though CNP is the only natriuretic peptide that has been isolated from the lower vertebrate brain to date.
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Bolke, Mark Edward. "Renal Responses to Differential Rates of Blood Volume Expansion in the Toad, Bufo marinus." PDXScholar, 1995. https://pdxscholar.library.pdx.edu/open_access_etds/4973.

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Three aspects of renal function were measured in the toad, Bufo marinus (N=lO): (1) effect of rate of blood volume expansion on renal functions (UFR; GFR; urine and plasma ion concentrations; and ion excretion rates), (2) effect of hypo- and hyperosmotic blood volume expansions on renal functions, and (3) role of GFR and tubular processes in the differential response of UFR under different osmotic expansion stresses. Renal responses to differential rates of blood volume expansion have not been investigated in amphibians. Rate responses will be analyzed considering effects: ( 1) during infusion (neural, or, short term regulation of extracellular fluid volume) and (2) post infusion (hormonal, or, long term regulation of extracellular fluid volume). Volume expansions were administered with hypoosmotic (0.4%) saline and hyperosmotic (1.4%) saline, and ranged in rate from 4.0 to 20.6 ml/kg/min. This protocol is designed to present volume regulatory mechanisms with increased volume stimuli and different osmotic stimuli. Overall, infusion rate had no significant effects on renal responses measured: urine flow rate (UFR); glomerular filtration rate (GFR); urine and plasma ion concentrations; natriuresis; or kaliuresis. This was true for the infusion period and for the observed post infusion period (90 min). Rate was correlated with GFR in the hypoosmotic group (r=0.30, p=0.04) and natriuresis in the hyperosmotic group (r=0.34, p=0.03). A significant positive correlation was observed between UFR and GFR. Relative to treatment, UFR differed significantly; GFR response was inherently similar despite differences at individual intervals, indicating UFR differences between the treatments is due to tubular processes. Responses to hypoosmotic infusion included a significant diuresis, natriuresis, and a decreased urine sodium concentration, relative to hyperosmotic infusion. At low UFRs the hyperosmotic group produced urine relatively concentrated in sodium. Urine sodium concentration and UFR were positively correlated in the hypoosmotic infusion group -- at high UFRs, kidneys were unable to produce a dilute urine.
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Marples, David. "Studies on the effects of N-ethylmaleimide (NEM) in the urinary bladder of Bufo marinus." Thesis, University of Oxford, 1990. http://ora.ox.ac.uk/objects/uuid:aaa76df4-838a-458f-af7a-482f43cc40f9.

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Lilienthal, Anneliese M. "The art of Biology : exploring and illustrating the hind limb morphology of the marine toad, Bufo marinus /." Connect to online version, 2005. http://ada.mtholyoke.edu/setr/websrc/pdfs/mhc/2005/98.pdf.

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Thomson, Susmita. "Local feedback regulation of salt & water transport across pumping epithelia : experimental & mathematical investigations in the isolated abdominal skin of Bufo marinus /." Connect to this title, 2002. http://theses.library.uwa.edu.au/adt-WU2003.0022.

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Ding, Yanli. "Studies of charge translocation by Bufo marinus Na⁺/K⁺ ATPase in its Na⁺/Na⁺ exchange mode." Ohio : Ohio University, 2009. http://www.ohiolink.edu/etd/view.cgi?ohiou1258082803.

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Books on the topic "Bufo marinus"

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Lawson, Walter J. The cane toad, Bufo marinus: A bibliography. Nathan, [Brisbane], Queensland: School of Australian Environmental Studies, Griffith University, 1987.

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Lewis, Stephanie. Cane toads: An unnatural history. New York: Doubleday, 1989.

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Christopher, Lever. The cane toad: The history and ecology of a successful colonist. Otley: Westbury Academic and Scientific Publishing, 2001.

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Kim, Young S. The effect of protons on phototransduction in the rod outer segment of Bufo marinas. [New Haven: s.n.], 1986.

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1919-, Underhill Raymond A., and Underhill Raymond A. 1919-, eds. Laboratory anatomy of the frog and toad. 6th ed. Dubuque, Iowa: Wm. C. Brown Publishers, 1994.

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Seibert, Patricia. Toad overload: A true tale of nature knocked off balance in Australia. Brookfield, Conn: Millbrook Press, 1996.

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Gleitzman, Morris. Toad away. New York: Yearling, 2007.

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Gleitzman, Morris. Toad away. New York: Random House, 2006.

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Gleitzman, Morris. Toad rage. New York: Random House, 2004.

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Gleitzman, Morris. Toad rage. New York: Random House, 2005.

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Book chapters on the topic "Bufo marinus"

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Easteal, Simon. "Range Expansion and Its Genetic Consequences in Populations of the Giant Toad, Bufo marinus." In Evolutionary Biology, 49–84. Boston, MA: Springer US, 1988. http://dx.doi.org/10.1007/978-1-4613-1043-3_3.

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"Bufo Marinus Saponin 1." In Spectroscopic Data of Steroid Glycosides: Spirostanes, Bufanolides, Cardenolides, 1946. Boston, MA: Springer US, 2006. http://dx.doi.org/10.1007/978-0-387-39574-6_468.

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Conference papers on the topic "Bufo marinus"

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Karols, Martynas, and Laima Česonienė. "KAUNO MARIŲ POVEIKIS NEMUNO VANDENS BŪKLEI." In 24-oji jaunųjų mokslininkų konferencijos „Mokslas – Lietuvos ateitis“ teminė konferencija APLINKOS APSAUGOS INŽINERIJA. Vilniaus Gedimino Technikos Universitetas, 2020. http://dx.doi.org/10.3846/aainz.2021.13.

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Nagrinėjama Kauno marių poveikio Nemuno vandens būklei problema. Darbo tikslas – įvertinti Kauno marių vandens būklę ir Kauno marių poveikį Nemuno upės vandens kokybei. Paviršinio vandens būklė vertinama pagal hidrocheminius rodiklius, kurie buvo imti iš 16 skirtingų Kauno marių vietų 4 skirtingais metų sezonais. Buvo vertinama ekologinio potencialo klasė pagal biocheminį deguonies suvartojimą (BDS7) ir bendrojo azoto (Nb) koncentracijas. Nustatyta, kad pagal BDS7 vertes Kauno marios atitinka geros ekologinio potencialo klasės vertes. Pagal Nb visose vietose Kauno marios neatitinka geros ekologinio potencialo klasės vertės. Nustatyta neigiama Kauno marių įtaka Nemuno upės būklei pagal BDS7 vertę, bendrojo azoto koncentraciją ir amonio azoto koncentraciją. Rezultatai rodo, kad Kauno marios daro neigiamą įtaką Nemuno paviršinio vandens būklei.
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Puškorius, Vytautas, and Eimuntas Kazimieras Paršeliūnas. "Ledo judesių įtaka gravimetriniams matavimams ant vandens paviršių." In Conference for Junior Researchers „Science – Future of Lithuania“. VGTU Technika, 2019. http://dx.doi.org/10.3846/geo.2019.006.

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Sunkio laukui nustatyti Lietuvos teritorijoje svarbu turėti didelio tikslumo ir tankumo gravimetrinius duomenis. Siekiant sumodeliuoti gravitacijos lauką teritorijoje, būtina įtraukti ir ežeringas teritorijas. Dideli ežerai, marios ar kiti didelio ploto vandens telkiniai visada buvo problema regioninėms sunkio lauko duomenų bazėms. Didžiausių sunkumų kyla dėl duomenų tuštumų ar per didelio atstumo tarp matuojamųjų punktų. Palydovinė, skrydžio ar laivais atliekami gra-vimetriniai matavimai taikomi jūrų, vandenynų sunkio laukui nustatyti, tačiau ežerų ar kitų regioninių vandens telkinių gravimetriniams matavimas jie yra nepraktiški dėl savo kainos ar skiriamosios gebos (tikslumo). Šiame straipsnyje anali-zuojamas antžeminis sunkio lauko nustatymo metodas ant užšalusio ežero, kuriame ledas juda dėl vėjuotų sąlygų. Per pastaruosius trejus metus Lietuvoje buvo atliktos kelios gravimetrinių matavimų kampanijos ant ledu padengtų ežerų, marių ir tvenkinių. Šių matavimų užduotis – užpildyti sunkio lauko duomenų spragas Lietuvos teritorijoje. Aliekant mata-vimus buvo stebėtas vėjo greitis matavimų metu, įvertintas ledo storis, vandens gylis ir specialia įranga stebėtas ledo vib-ravimas. Daugybė veiksnių turi įtakos gravimetriniams matavimams ant ledu padengtų vandens telkinių, Juos būtina kuo tiksliau įvertinti, eliminuoti matavimų klaidas, sudaryti tikslesnių gravimetrinių matavimų metodiką.
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Reports on the topic "Bufo marinus"

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Bolke, Mark. Renal Responses to Differential Rates of Blood Volume Expansion in the Toad, Bufo marinus. Portland State University Library, January 2000. http://dx.doi.org/10.15760/etd.6849.

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Hoagland, Todd. Whole Body i=In Vivo Vascular Compliance in Two Amphibians, Bufo Marinus and Rana Cate. Portland State University Library, January 2000. http://dx.doi.org/10.15760/etd.7255.

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Georgitsis, Micheal. The Effect of Lymph Sac Pressure on Lymph Heart Pressure Development in the Toad Bufo Marinus. Portland State University Library, January 2000. http://dx.doi.org/10.15760/etd.7232.

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Baustian, Mark. The contribution of the lymph hearts in compensation for acute hypovolemic stress in the toad Bufo marinus. Portland State University Library, January 2000. http://dx.doi.org/10.15760/etd.5401.

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Crossley II, Dane. The Role of Pulmocutaneous Baroreceptors in the Control of Lymphatic Heart Rate in the Toad Bufo Marinus. Portland State University Library, January 2000. http://dx.doi.org/10.15760/etd.6768.

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Palioca, Wayne. The effect of body temperature on arteriovenous oxygen difference during rest and activity in the toad, Bufo marinus. Portland State University Library, January 2000. http://dx.doi.org/10.15760/etd.5613.

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Duerr, Jeffrey. An analysis of the pH tolerance and substrate preference of isolated skeletal muscle mitochondria from Bufo marinus and Rana catesbeiana. Portland State University Library, January 2000. http://dx.doi.org/10.15760/etd.6085.

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