Rozprawy doktorskie na temat „Respiration physiology”
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Crisp, Andrew John. "Cardiac ventricular receptors and the control of respiration". Thesis, University of Newcastle Upon Tyne, 1989. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.241355.
Pełny tekst źródłaPaterson, D. J. "Some factors affecting respiration in man and the cat". Thesis, University of Oxford, 1989. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.329931.
Pełny tekst źródłaHoward, Luke Sebastian Geoffrey Eliot. "The effects of prolonged hypoxia on respiration in man". Thesis, University of Oxford, 1995. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.282330.
Pełny tekst źródłaHOIT, JEANNETTE DEE. "AGE AND SPEECH BREATHING (KINEMATICS, PHYSIOLOGY, RESPIRATORY)". Diss., The University of Arizona, 1986. http://hdl.handle.net/10150/183956.
Pełny tekst źródłaHattersley, B. "Dark respiration and carbohydrate metabolism in leaves of Solanum dulcamara L". Thesis, University of East Anglia, 1988. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.384609.
Pełny tekst źródłaAl-Kadhomiy, N. K. "Gill development, growth and respiration of the flounder, Platichthys flesus (L.)". Thesis, University of Bristol, 1985. http://hdl.handle.net/1983/f8e6e177-9551-4e58-b76c-02394305e40c.
Pełny tekst źródłaIwarsson, Jenny. "Breathing and phonation : effects of lung volume and breathing behaviour on voice function /". Stockholm, 2001. http://diss.kib.ki.se/2001/91-628-4522-5.
Pełny tekst źródłaHart, A. J. "Physiology of growth and respiration during the cell cycles of Bacillus subtilis and Paracoccus denitrificans". Thesis, University of Liverpool, 1985. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.356282.
Pełny tekst źródłaScott, Adrienne S. "Comparison of respiratory sinus arrhythmia integration in athletes and non-athletes". Thesis, McGill University, 2002. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=33924.
Pełny tekst źródłaTippetts, Trevor Stanley. "Cigarette Smoke Increases Cardiomyocyte Ceramide Accumulation and Inhibits Mitochondrial Respiration". BYU ScholarsArchive, 2015. https://scholarsarchive.byu.edu/etd/5596.
Pełny tekst źródłaBevan, David J. (David John). "The effect of dissolved oxygen and water depth on the respiratory behaviour and growth of Clarias macrocephalus (Pisces, Clariidae) /". Thesis, McGill University, 1986. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=65506.
Pełny tekst źródłaMoser, Jonathan G. "Cold Season Physiology of Arctic Plants". FIU Digital Commons, 2012. http://digitalcommons.fiu.edu/etd/750.
Pełny tekst źródłaBruhn, Dan. "Plant respiration and climate change effects". Roskilde : Risø National Laboratory, 2002. http://www.risoe.dk/rispubl/PRD/prdpdf/ris-r-1332.pdf.
Pełny tekst źródłaShearman, Julia. "The regulation of respiration on plant growth and development of Fallopia japonica, Japanese knotweed". Thesis, University of Sussex, 2016. http://sro.sussex.ac.uk/id/eprint/62040/.
Pełny tekst źródłaSekharan, Soja. "Aged soybean (Glycine max [L.] Merrill) seeds their physiology and vigor assessment /". Columbus, Ohio : Ohio State University, 2005. http://rave.ohiolink.edu/etdc/view?acc%5Fnum=osu1135809134.
Pełny tekst źródłaFrise, Matthew. "Iron deficiency and human hypoxia physiology". Thesis, University of Oxford, 2016. https://ora.ox.ac.uk/objects/uuid:a6cbaa64-eed4-43db-8a2f-2826e6bbd249.
Pełny tekst źródłaWisse, Gesine Alida. "The role of sodium in the growth, respiration and membrane transport of Pseudomonas doudoroffii /". Thesis, McGill University, 1986. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=65517.
Pełny tekst źródłaJordan, Amy Selina. "The control of respiration and upper airway muscle activity in healthy young men and women". Title page, table of contents and abstract only, 2002. http://web4.library.adelaide.edu.au/theses/09PH/09phj812.pdf.
Pełny tekst źródłaZachrich, Timothy P. "Max VO₂ and ventilatory threshold in university level hockey players". Bowling Green, Ohio : Bowling Green State University, 2008. http://rave.ohiolink.edu/etdc/view?acc%5Fnum=bgsu1210886896.
Pełny tekst źródłaAltman, Mary Ellen 1962. "SPEECH BREATHING KINEMATICS IN WOMEN". Thesis, The University of Arizona, 1986. http://hdl.handle.net/10150/277081.
Pełny tekst źródłaRowe, Jack E. "Effect of inspiration to expiration ratio on autonomic arousal /". free to MU campus, to others for purchase, 1997. http://wwwlib.umi.com/cr/mo/fullcit?p9842562.
Pełny tekst źródłaGough, Christopher Michael. "Quantification and Physiology of Carbon Dynamics in Intensively Managed Loblolly Pine (Pinus taeda L.)". Diss., Virginia Tech, 2003. http://hdl.handle.net/10919/11232.
Pełny tekst źródłaPh. D.
Song, Sarah M. "Respiration and whole body lactate in wild and aquacultured penaeid shrimp challenged with hypoxia and the bacterial pathogen Vibrio campbellii". Thesis, College of Charleston, 2015. http://pqdtopen.proquest.com/#viewpdf?dispub=1601676.
Pełny tekst źródłaEstuarine organisms, such as juvenile penaeid shrimp, experience fluctuating oxygen pressures on a daily basis. In coastal waters of the southeastern United States, severe hypoxia (< 4–6 kPa) is common in the summer, also a time during which bacterial concentrations in seawater are high. In response to invading bacteria, crustaceans mount an immune defense resulting in aggregations of circulating hemocytes. These aggregates can be trapped in and obstruct hemolymph flow through the gills, inhibiting oxygen uptake. Hypoxia itself is also known to inhibit immune function. In this study we investigated some key characteristics of penaeid shrimp that are likely to be associated with their ability to cope with hypoxia and bacterial infection. We compare critical Po2, the oxygen pressure below which oxygen uptake depends on available ambient oxygen, in two commercially important shrimp species: wild Litopenaeus setiferus, the Atlantic white shrimp, and aquacultured Litopenaeus vannamei, the Pacific whiteleg shrimp. We also compare whole body lactate concentrations following acute exposure to severe environmental hypoxia (5.3 kPa), and injection with a sub-lethal dose of bacteria ( Vibrio campbellii 90-69B3), in aquacultured L. vannamei and in wild-caught Farfantepenaeus duorarum, the Atlantic pink shrimp. LD50 tests indicate that the virulence of V. campbellii in L. setiferus (LD50 = 6.4 × 105 CFU g−1 shrimp) is similar to that previously determined in L. vannamei (LD50 = 3.06 × 105 CFU g−1 shrimp). We found no difference between L. vannamei and L. setiferus in critical Po2, which fell between 3.5–5.2 kPa in both species. Whole body lactate concentration was measured in shrimp held in normoxia (>16 kPa) or hypoxia and injected with saline or bacteria. There were no effects of exposure in L. vannamei, however lactate concentration in F. duorarum increased by 60% in shrimp exposed concurrently to hypoxia and injected-bacteria, compared to saline-injected shrimp exposed to hypoxia and Vibrio-injected shrimp exposed to normoxia. This is consistent with previous findings in our lab, that hemocyanin in L. vannamei has a higher concentration and O2 affinity, resulting in better tissue oxygenation, than that in wild species of Atlantic shrimp. These data suggest that aquacultured L. vannamei has an adaptive advantage over at least one species of wild penaeid shrimp in coping with hypoxia and bacterial infection.
Fennir, Mohamed A. "In situ estimation of respiration and transpiration rates of stored fruits and vegetables". Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1997. http://www.collectionscanada.ca/obj/s4/f2/dsk2/ftp01/MQ29691.pdf.
Pełny tekst źródłaAllen, Leon Akila Glynne. "Effect of temperature on the physiology of two exotic frogs: possible causes of distribution". Thesis, University of Canterbury. Biological Sciences, 2015. http://hdl.handle.net/10092/10822.
Pełny tekst źródłaTitulaer, William A. "Respiration physiology and the gill structure of the New Zealand freshwater crayfish Paranephrops zealandicus (White 1847) (Decapoda: Parastacidae)". Thesis, University of Canterbury. Zoology, 1995. http://hdl.handle.net/10092/5955.
Pełny tekst źródłaLeaver, James Thomas. "The enzymologyand physiology of nitrate and selenate reduction/respiration in Enterobacter cloacae SLD1a-1 and Aeromonas hydrophila ATCC7966". Thesis, University of Newcastle Upon Tyne, 2007. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.445542.
Pełny tekst źródłaWord, James Mabry. "Physiological adjustments to aestivation and activity in the cocoon-forming frogs Cyclorana platycephala and Cyclorana maini". University of Western Australia. School of Animal Biology, 2008. http://theses.library.uwa.edu.au/adt-WU2008.0254.
Pełny tekst źródłaBlank, Tara M. "Cardio-Respiratory Ontogeny and the Transition to Bimodal Respiration in an Air Breathing Fish: Morphological and Physiological Development in Normoxia and Hypoxia". Thesis, University of North Texas, 2009. https://digital.library.unt.edu/ark:/67531/metadc11056/.
Pełny tekst źródłaDhingra, Rishi R. "Intrinsic and Extrinsic Mechanisms Regulate the Variability of the Respiratory Rhythm in Rodents". Case Western Reserve University School of Graduate Studies / OhioLINK, 2014. http://rave.ohiolink.edu/etdc/view?acc_num=case1383514460.
Pełny tekst źródłaScheepers, Ilana. "The influence of genetic manipulation of cytosolic aldolase (ALDc) on respiration in sugarcane". Thesis, Link to the online version, 2005. http://hdl.handle.net/10019/1190.
Pełny tekst źródłaLundmark, Maria. "Low temperature acclimation in plants : alterations in photosynthetic carbon metabolism". Doctoral thesis, Umeå : Umeå Plant Science Centre, Department of Plant Physiology, Umeå University, 2007. http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-1333.
Pełny tekst źródłaZervopoulos, Peter C. (Peter Cosmas). "Relationship Between Ventilation and Oxygen Uptake at 40% And 85% of Peak Oxygen Uptake in 18-35-Year-Old Women Using the Arm Crank Ergometer". Thesis, North Texas State University, 1988. https://digital.library.unt.edu/ark:/67531/metadc500377/.
Pełny tekst źródłaPereira, De Sa Rui Carlos. "Respiration and cardio-respiratory interactions during sleep in space: influence of gravity". Doctoral thesis, Universite Libre de Bruxelles, 2008. http://hdl.handle.net/2013/ULB-DIPOT:oai:dipot.ulb.ac.be:2013/210416.
Pełny tekst źródłarespiratoire et le contrôle de la respiration, ainsi que sur les interactions cardio-respiratoires pendant les différents stades du sommeil.
Le chapitre introductif présente le contexte général et les objectifs de la thèse. Des sections abordant le sommeil, la respiration, et l’interaction cardio-respiratoire y sont présentées, résumant l’état actuel des connaissances sur les effets de la pesanteur sur chacun de ces systèmes.
Dans le deuxième chapitre, l’expérience “Sleep and Breathing in microgravity”, qui constitue la source des données à la base de ce travail, est présentée en détail.
L’étude des signaux de longue durée requiert avant tout de disposer d’outils performants
d’analyse des signaux. La première partie de la thèse présente en détail deux algorithmes :un
algorithme de détection automatique d’événements respiratoires (inspiration / expiration)
basé sur des réseaux neuronaux artificiels, et un algorithme de quantification de l’amplitude
et de la phase de l’arythmie sinusale pendant le sommeil, utilisant la méthode des ondelettes.
La validation de chaque algorithme est présentée, et leur performance évaluée. Cette partie
inclut aussi des courtes introductions théoriques aux réseaux de neurones artificiels ainsi
qu’aux méthodes d’analyse temps–fréquence (Fourier et ondelettes).
Une approche similaire à celle utilisée pour la détection automatique d’événements respiratoires a été appliquée à la détection d’événements dans des signaux de vitesse du sang
dans l’artère cérébrale moyenne, mesures obtenues par Doppler transcrânien. Ceci est le
sujet de la thèse annexe.
Ces deux algorithmes ont été appliqués aux données expérimentales pour extraire des
informations physiologiques quant à l’impact de la pesanteur sur la mécanique respiratoire et
l’interaction cardio-respiratoire. Ceci constitue la deuxième partie de la thèse. Un chapitre
est consacré aux effets de l’apesanteur sur la mécanique respiratoire pendant le sommeil.
Ce chapitre a mis en évidence, pour tous les stades de sommeil, une augmentation de la
contribution abdominale en microgravité, suivi d’un retour progressif vers des valeurs observées avant le vol. L’augmentation initiale était attendue, mais l’adaptation progressive
observée ne peut pas être expliquée par un effet purement mécanique, et nous suggère la
présence d’un mécanisme d’adaptation central. Un deuxième chapitre présente les résultats
comparant l’arythmie sinusale pendant le sommeil avant le vol, en apesanteur et après le retour sur terre. Le rythme cardiaque pendant le sommeil dans l’espace présente une moindre
variabilité. Les différences NREM–REM observées sur terre pour les influences vagales et sympathiques sont accentuées dans l’espace. Aucun changement significatif n’est présent pour
le gain et la différence de phase entre les les signaux cardiaque et respiratoire en comparant
le sommeil sur terre et en apesanteur.
La dissertation termine par une discussion générale du travail effectué, incluant les prin-
cipales conclusions ainsi que les perspectives qui en découlent.
Doctorat en Sciences biomédicales et pharmaceutiques
info:eu-repo/semantics/nonPublished
Wallace, Nathan Christopher. "Metabolic and Physiological Determinants in Listeria monocytogenes Anaerobic Virulence Regulation". University of Dayton / OhioLINK, 2018. http://rave.ohiolink.edu/etdc/view?acc_num=dayton1543424768026244.
Pełny tekst źródłaManley, Elizabeth. "Apneic Bradycardia : terrestrial and aquatic responses in man under working conditions". Thesis, Rhodes University, 1989. http://hdl.handle.net/10962/d1001838.
Pełny tekst źródłaBrown, Anne Christine 1962. "Effects of salinity and temperature on the respiratory physiology of the Dungeness crab, Cancer magister, during development". Thesis, Thesis (Ph. D.)--University of Oregon, 1991, 1991. http://hdl.handle.net/1794/9845.
Pełny tekst źródłaCancer magister, the Dungeness crab, occurs in different habitats during its life cycle, habitats which vary widely in the magnitude of salinity and temperature changes. Cancer magister hemocyanin also changes in structure and oxygenation properties during development. The following question was considered in this thesis: what are the effects of environmental salinity and temperature on metabolic rates, ionic and osmotic regulation and hemocyanin oxygen affinity in Q. magister during development. Metabolic rates and hemolYmph ionic and osmotic concentrations were measured in the megalopa, 1st juvenile, 5th juvenile and adult crab eight hours after acute exposure to 100% seawater (=32 ppt), 75% seawater and 50% seawater at both 10°C and 20°C. The oxygen binding properties of the whole hemolymph from these stages in 100% seawater at 10°C was determined. The effects of calcium and magnesium on the oxygen affinity of purified hemocyanin from different stages were also determined. In 100% seawater, routine metabolic rates of the four stages scale with body mass over the size range, 0.05 gm to 500 gm. The Q10 (10°C to 20°C) for the megalopa is higher in 75% seawater and 50% seawater than in 100% seawater. For the 1st juvenile, 5th juvenile and adult the Q10 values (10°C to 20°C) are independent of salinity. The megalopa, 1st juvenile and 5th juvenile are weaker regulators of hemolymph chloride, sodium and osmotic concentrations than the adult. The megalopa and adult, unlike the 1st juvenile and 5th juvenile, strongly regulate hemolymph calcium in reduced salinity. In 100% seawater hemolymph magnesium is significantly higher in the megalopa, 1st juvenile and 5th juvenile than in the adult. The oxygen affinities of whole hemolymph from the four stages are indistinguishable when adjusted for endogenous L-lactate concentrations; the Bohr coefficients are not significantly different among stages. The effect of magnesium on oxygen affinity of purified adult hemocyanin is influenced by proton concentration; the effect of calcium is independent of proton concentration. In 100% seawater, endogenous inorganic ion concentrations in the whole hemolymph of the various stages reduce the intrinsic stage specific differences in hemocyanin oxygen affinity.
Nilsson, Lena. "Respiratory monitoring using reflection mode photoplethysmography : clinical and physiological aspects /". Linköping : Dept. of Medicine and Care, Univ, 2005. http://www.bibl.liu.se/liupubl/disp/disp2005/med898s.pdf.
Pełny tekst źródłaClaure, Nelson Remberto. "Microcomputer-based system for the study of the respiratory system in newborns". FIU Digital Commons, 1990. http://digitalcommons.fiu.edu/etd/2382.
Pełny tekst źródłaAlmgren, Birgitta. "Endotracheal Suction a Reopened Problem". Doctoral thesis, Uppsala : Acta Universitatis Upsaliensis : Univ.-bibl. [distributör], 2005. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-4798.
Pełny tekst źródłaAppelberg, Jonas. "Ventilation and Lung Volume During Sleep and in Obstructive Sleep Apnea". Doctoral thesis, Uppsala : Acta Universitatis Upsaliensis : Univ.-bibl. [distributör], 2003. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-3363.
Pełny tekst źródłaMatott, Michael Patrick. "The Effects of Oxygen on the Electrophysiology of CO2/H+-Chemosensitive and -Insensitive Neurons of the Solitary Complex of the Rat". Scholar Commons, 2012. http://scholarcommons.usf.edu/etd/4148.
Pełny tekst źródłaSiekemeyer, Leah C. "Inspiratory Muscle Strength Training in Upper Airway Obstruction". Miami University / OhioLINK, 2011. http://rave.ohiolink.edu/etdc/view?acc_num=miami1306417918.
Pełny tekst źródłaThamrin, Cindy. "Measurement of lung function using broadband forced oscillations /". Connect to this title, 2006. http://theses.library.uwa.edu.au/adt-WU2006.0103.
Pełny tekst źródłaBeyer, Benoit. "Contribution à la modélisation 3D du thorax humain durant le mouvement respiratoire : analyse in vivo de la cinématique des articulations du thorax". Thesis, Lyon, 2016. http://www.theses.fr/2016LYSE1309/document.
Pełny tekst źródłaBreathing is a vital phenomenon that implies synergy of various anatomical structures that constitute the thorax. Joint physiology remains a relatively poorly-known component of the overall thorax physiology. Quantitative literature related to in vivo thorax kinematics during breathing is scarce. The present work focuses specifically on developing and applying a methodology to reach this goal. The developed method combined processing of CT data obtained at different lung volumes and infographic techniques. Detailed ranges of motion (ROMs) and axes of movement (mean helical axes, MHAs) were obtained at costovertebral joints in 12 asymptomatic subjects; rib ROMs gradually decrease with increasing rib number; lung volume and rib level have a significant influence on rib ROM; MHAs did not differ between rib levels. In addition, the method was applied on a sample of 10 patients with cystic fibrosis. The pathological condition significantly influenced CVJ ROMs while the orientation of the MHAs did not differ. Finally, the sternal displacement, sternal angle variations and sternocostal joints (SCJ at rib1 to 7) kinematics during breathing motion were analyzed. Rib ranges of motion relative to sternum decreased with increasing rib number similarly to CVJ. Orientation of the MHAs did not differ between SCJ levels. A significant linear correlation was demonstrated between sternum vertical displacement and rib ranges of motion at both CVJ and SCJ. The present work substantially contributes to 3D modelling of human thorax in breathing at a joint level both qualitatively and quantitatively
Birk, Matthew A. "Ecophysiology of Oxygen Supply in Cephalopods". Scholar Commons, 2018. https://scholarcommons.usf.edu/etd/7265.
Pełny tekst źródłaLewis, Ricky W. "TOXICITY OF ENGINEERED NANOMATERIALS TO PLANT GROWTH PROMOTING RHIZOBACTERIA". UKnowledge, 2016. http://uknowledge.uky.edu/pss_etds/77.
Pełny tekst źródłaAzzolini, Marisa. "Fisiologia pós-colheita de goiabas 'Pedro Sato': estádios de maturação e padrão respiratório". Universidade de São Paulo, 2003. http://www.teses.usp.br/teses/disponiveis/11/11144/tde-25022003-140356/.
Pełny tekst źródłaThe guava presents high perecibilidade degree needing a handling efficient postharvest capable to reduce the senescence processes. Therefore, it is essential to the knowledge of the respiratory pattern and of the processes involved in the ripening. The present work was accomplished with the objectives of determining the maturation indexes, the influence of the maturation stage in the quality postharvest and the respiratoy pattern of guavas 'Pedro Sato' as well as evaluating the fruit response to the application of the exogenous ethylene and to blocking the action of ethylene 1-MCP (1-metylcyclopropene). In the first phase it was determined the maturation indexes and the influence of three maturation stage in the quality postharvet of fruit. The guavas were selected in three maturation stages according to the color of the peel: Stage 1: dark green peel; Stage 2: light green peel; Stage 3: yellowish green peel. The fruit was stored in a chamber with controlled temperature of 23 + 1 o C and 85 + 5 % RH and analyzed for physicochemical changes and sensorial quality. In the second phase of the work the respiratory pattern of the fruit through the respiratory activity, the ethylene production, and the changes physicochemichal after harvesting. The fruit response to the aplication of exogenous ethylene (1000ml.l -1 ) and of 1-methylcyclopropene (300nl. l -1 ) was also evaluated. The color of the peel and the firmness of the pulp were considered the best maturation indexes. The physicochemical variables presented little variation among the maturation stages during the ripening. However, significantive differences were observed concerning the sensorial analysis, being the best grades granted to stage 3 fruit. In the second phase the fruit presented increse in respiratory activity in production of ethylene independent at the maturation stage, determining the climacteric standard. The maximum respiratory activity and the ethylene production were verified after complete ripening. The guavas did not to responses the application of exogenous ethylene, showing no ripening difference respond in the ripening in relation to the guavas in the control treatment. However, the 1-MCP has sensibly retarded the ripening process in guavas.
Bron, Ilana Urbano. "Amadurecimento do mamão 'Golden': ponto de colheita, bloqueio da ação do etileno e armazenamento refrigerado". Universidade de São Paulo, 2006. http://www.teses.usp.br/teses/disponiveis/11/11136/tde-07072006-161639/.
Pełny tekst źródłaThe present work had as objective the study of how the harvest time, ethylene action blockade and cold storage influence the ripening and the quality of Golden papaya fruit. In the first experiment Golden papayas were harvested at 4 maturity stages (Stage 0: totally green; Stage 1: up to 15% of yellow skin; Stage 2: 16-25% of yellow skin; Stage 3: 26-50% of yellow skin) and analyzed during ripening at 23ºC in relation to physical and chemical (skin color, pulp firmness, soluble solids, titratable acidity and ascorbic acid), physiological (respiration and ethylene production) and sensorial (flavor, odor, firmness and appearance) characteristics. From the 2nd day of storage at 23ºC, fruits presented stable respiratory activity around 31 mL CO2 kg-1 h-1 for stages 0, 1 e 2 and 37 mL CO2 kg-1 h-1 for stage 3. It was not observed typical climacteric behavior in any maturity stage. Only fruits harvested in stage 0 and 1 showed ethylene production peak of 2.1 µL C2H4 kg-1 h-1 at the 7th day and 1.3 µL C2H4 kg-1 h-1 at the 6th day of storage at 23ºC, respectively. Fruits harvested at stages 2 and 3 had superior scores in sensorial evaluation, mainly for flavor and appearance. Sensorial characteristics of fruits from all maturity stages were scored as regular or superior. Harvest at different maturity stages altered the fruit postharvest physiology and when effectuated at early stages reduced the fruit quality but did not make the fruit consume impossible. In the second experiment papayas harvested at maturity stage 1 were evaluated. Half of the fruit treated and non-treated with 100 nL L-1 of 1-methylcyclopropene (1- MCP) were exposed to 23ºC, while the other half was stored at 11ºC for 20 days, prior to transference to 23ºC. During the ripening, fruits were analyzed for the same physical, chemical and physiological characteristics as done in the first experiment, besides the activity of the pectinmethylesterase (PME) enzyme. Fruits that received 1-MCP, and were not refrigerated, presented reduction in respiratory activity, ethylene production, skin color development and PME activity, maintaining high pulp firmness during the storage at 23ºC. Even with gradual increase in ethylene production at 23ºC, fruits treated with 1-MCP maintained high firmness, but presented loss of green skin color. The cold storage harmed the ethylene production in non-treated and 1- MCP-treated fruits when they were transferred to 23ºC. Even so, the firmness in those fruits decreased, being this decrease always lower in 1-MCP treated fruits. The results suggest that pulp softening is more dependent on ethylene when compared to skin color development and that there are processes responsible for firmness loss that are independent on ethylene. It is also possible to assume that prolonged ethylene inhibition or the inhibition of receptor sites in fruits that were harvested at early maturity stages, reflects in slow recovery capacity of ethylene action and production, suggesting that the use of ethylene action blockers in these fruits must be done with caution.
Ahmad, Bahuri Nor Faizal. "The effects of volitional breathing and carbon dioxide inhalation on human local field potentials". Thesis, University of Oxford, 2014. http://ora.ox.ac.uk/objects/uuid:a5431969-0a68-4450-9a12-f5a3288d3730.
Pełny tekst źródła