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Letteratura scientifica selezionata sul tema "Active oxygen – Physiological effect"

Autore: Grafiati

Pubblicato: 4 giugno 2021

Ultima modifica: 20 febbraio 2023

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Articoli di riviste sul tema "Active oxygen – Physiological effect"

Colon, Marcus, Andrew Hodgson, Eimear Donlon, and James E. J. Murphy. "Effects of Competitive Triathlon Training on Telomere Length." Journal of Aging and Physical Activity 27, no. 4 (August 1, 2019): 510–14. http://dx.doi.org/10.1123/japa.2018-0248.

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Telomeres act as a mitotic clock and telomere-related senescence has been linked to age-related physiological decline. There is increasing evidence lifestyle factors can influence telomere length (TL). The purpose of this study was to determine the effect of competitive triathlon training on TL. Seven competitive male triathletes and seven recreationally active males participated in the study. Relative TL was measured using quantitative polymerase chain reaction. Physiological parameters key to athletic performance such as maximal oxygen intake, lactate threshold, and running economy were also

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Madueno, Maria C., Vincent J. Dalbo, Joshua H. Guy, Kate E. Giamarelos, Tania Spiteri, and Aaron T. Scanlan. "Reduced Fatigue in Passive Versus Active Recovery: An Examination of Repeated-Change-of-Direction Sprints in Basketball Players." International Journal of Sports Physiology and Performance 13, no. 8 (September 1, 2018): 1034–41. http://dx.doi.org/10.1123/ijspp.2017-0831.

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Purpose: To investigate the physiological and performance effects of active and passive recovery between repeated-change-of-direction sprints. Methods: Eight semiprofessional basketball players (age: 19.9 [1.5] y; stature: 183.0 [9.6] cm; body mass: 77.7 [16.9] kg; body fat: 11.8% [6.3%]; and peak oxygen consumption: 46.1 [7.6] mL·kg−1·min−1) completed 12 × 20-m repeated-change-of-direction sprints (Agility 5-0-5 tests) interspersed with 20 seconds of active (50% maximal aerobic speed) or passive recovery in a randomized crossover design. Physiological and perceptual measures included heart ra

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Carmeli, Eli, Pini Orbach, David T. Lowenthal, Joav Merrick, and Raymond Coleman. "Long-Term Effects of Activity Status in the Elderly on Cardiorespiratory Capacity, Blood Pressure, Blood Lipids, and Body Composition: A Five-Year Follow-Up Study." Scientific World JOURNAL 3 (2003): 751–67. http://dx.doi.org/10.1100/tsw.2003.66.

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It is generally recognized that physical activity levels in the elderly do not remain constant over time, and typically there is a marked reduction in physical activities in the elderly. The long-term benefits of regular physical training programs in the elderly are still not fully understood. This is a study of 55 elderly healthy subjects (over 65 years old) and re-evaluated for the effects of different physical activity patterns (sedentary, moderately active, and highly active) on several physiological parameters (pre- and post-training) after a 5-year period (5.30 ± 1.14 years). Measurement

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Reid, MB. "Reactive Oxygen and Nitric Oxide in Skeletal Muscle." Physiology 11, no. 3 (June 1, 1996): 114–19. http://dx.doi.org/10.1152/physiologyonline.1996.11.3.114.

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Skeletal muscle produces oxygen radicals, nitric oxide, and a variety of redox-active derivatives that modulate muscle function under physiological conditions. In unfatigued muscle, reactive oxygen intermediates and nitric oxide exert opposing effects on excitation-contraction coupling. During strenuous exercise, oxidants accumulate in the tissue and accelerate the fatigue process.

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Rubalcaba, Juan G., Wilco C. E. P. Verberk, A. Jan Hendriks, Bart Saris, and H. Arthur Woods. "Oxygen limitation may affect the temperature and size dependence of metabolism in aquatic ectotherms." Proceedings of the National Academy of Sciences 117, no. 50 (November 30, 2020): 31963–68. http://dx.doi.org/10.1073/pnas.2003292117.

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Both oxygen and temperature are fundamental factors determining metabolic performance, fitness, ecological niches, and responses of many aquatic organisms to climate change. Despite the importance of physical and physiological constraints on oxygen supply affecting aerobic metabolism of aquatic ectotherms, ecological theories such as the metabolic theory of ecology have focused on the effects of temperature rather than oxygen. This gap currently impedes mechanistic models from accurately predicting metabolic rates (i.e., oxygen consumption rates) of aquatic organisms and restricts predictions

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Molina-Sotomayor, Edgardo, Marcelo González Orb, Francisco Pradas de la Fuente, Giovanni Carozzi Figueroa, Antonio Sánchez-Oliver, and José González-Jurado. "Effects of Cardiorespiratory Exercise on Cognition in Older Women Exposed to Air Pollution." International Journal of Environmental Research and Public Health 16, no. 2 (January 16, 2019): 245. http://dx.doi.org/10.3390/ijerph16020245.

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The aim was to analyze the effects of cardiorespiratory exercise and air pollution on cognition and cardiovascular markers in four groups of older women: the active/clean air group (AC), the active/polluted air group (AP), the sedentary/clean air group (SC), and the sedentary/polluted air group (SP). Active groups performed a training task based on progressive walking. Prior to and after the experiment, the following parameters were assessed: cognition, by Mini Mental State Examination (MMSE); maximum oxygen uptake (VO2max), estimated by the Six-Minute Walk Test (6mWT); heart rate (HR); and ox

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Losnegard, Thomas, Martin Andersen, Matt Spencer, and Jostein Hallén. "Effects of Active Versus Passive Recovery in Sprint Cross-Country Skiing." International Journal of Sports Physiology and Performance 10, no. 5 (July 2015): 630–35. http://dx.doi.org/10.1123/ijspp.2014-0218.

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Purpose:To investigate the effects of an active and a passive recovery protocol on physiological responses and performance between 2 heats in sprint cross-country skiing.Methods:Ten elite male skiers (22 ± 3 y, 184 ± 4 cm, 79 ± 7 kg) undertook 2 experimental test sessions that both consisted of 2 heats with 25 min between start of the first and second heats. The heats were conducted as an 800-m time trial (6°, >3.5 m/s, ~205 s) and included measurements of oxygen uptake (VO2) and accumulated oxygen deficit. The active recovery trial involved 2 min standing/walking, 16 min jogging (58% ± 5%

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Milovanova, Tatyana N., Veena M. Bhopale, Elena M. Sorokina, Jonni S. Moore, Thomas K. Hunt, Martin Hauer-Jensen, Omaida C. Velazquez, and Stephen R. Thom. "Hyperbaric oxygen stimulates vasculogenic stem cell growth and differentiation in vivo." Journal of Applied Physiology 106, no. 2 (February 2009): 711–28. http://dx.doi.org/10.1152/japplphysiol.91054.2008.

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We hypothesized that oxidative stress from hyperbaric oxygen (HBO2, 2.8 ATA for 90 min daily) exerts a trophic effect on vasculogenic stem cells. In a mouse model, circulating stem/progenitor cell (SPC) recruitment and differentiation in subcutaneous Matrigel were stimulated by HBO2and by a physiological oxidative stressor, lactate. In combination, HBO2and lactate had additive effects. Vascular channels lined by CD34+SPCs were identified. HBO2and lactate accelerated channel development, cell differentiation based on surface marker expression, and cell cycle entry. CD34+SPCs exhibited increases

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Dehghani, Hamed, Mohammad Ali Oghabian, Seyed Amir Hosein Batouli, Jalil Arab Kheradmand, and Ali Khatibi. "Effect of Physiological Noise on Thoracolumbar Spinal Cord Functional Magnetic Resonance Imaging in 3T Magnetic Field." Basic and Clinical Neuroscience Journal 11, no. 6 (November 1, 2020): 737–52. http://dx.doi.org/10.32598/bcn.11.6.1395.1.

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Introduction: Functional magnetic resonance imaging (fMRI) methods have been used to study sensorimotor processing in the spinal cord. However, these techniques confront unwanted noises to the measured signal from the physiological fluctuations. In the spinal cord imaging, most of the challenges are consequences of cardiac and respiratory movement artifacts that are considered as significant sources of noise, especially in the thoracolumbar region. In this study, we investigated the effect of each source of physiological noise and their contribution to the outcome of the analysis of the blood-

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Mikalački, Milena, Nebojša Čokorilo, and Pedro Jesús Ruiz-Montero. "The effects of a pilates-aerobic program on maximum exercise capacity of adult women." Revista Brasileira de Medicina do Esporte 23, no. 3 (May 2017): 246–49. http://dx.doi.org/10.1590/1517-869220172303156004.

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ABSTRACT Introduction: Physical exercise such as the Pilates method offers clinical benefits on the aging process. Likewise, physiologic parameters may be improved through aerobic exercise. Methods: In order to compare the differences of a Pilates-Aerobic intervention program on physiologic parameters such as the maximum heart rate (HRmax), relative maximal oxygen consumption (relative VO2max) and absolute (absolute VOmax), maximum heart rate during maximal oxygen consumption (VO2max-HRmax), maximum minute volume (VE) and forced vital capacity (FVC), a total of 64 adult women (active group = 4

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Tesi sul tema "Active oxygen – Physiological effect"

Gutowski, Mariusz. "Molecular detection and characterisation of biologically relevant free radicals during surgical ischaemia-reperfusion." Thesis, University of South Wales, 2011. https://pure.southwales.ac.uk/en/studentthesis/molecular-detection-and-charcaterisation-of-biologically-relevant-free-radicals-during-surgical-ischaemiareperfusion(016f6447-5d02-45f7-a543-8b880148dc23).html.

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Oxygen is one of the most important molecules in human beings. Our research is focused on how the human body can respond and adapt to the physiological challenge posed by a lack of oxygen. Ascorbic acid (Vitamin C) is one of the most important and considered the most effective water-soluble, chain-breaking antioxidant in human plasma, with the capacity to prevents damage by free radicals. This thesis presents four studies investigating the phenomenon of Reactive Oxygen Species (ROS) generation in the many different surgical conditions in the animal and in the human. Study one investigated the

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Wu, Wan Man. "Reactive oxygen species and murine malaria." Thesis, The University of Sydney, 1992. https://hdl.handle.net/2123/26446.

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The aim of this study was to investigate the role of ROS in the protective and pathological immune response during malarial infection. For this purpose, four isolates of Plasmodium parasites (P. berghei ANKA, P. vinckei, P. berghei K152 and P. chabaudi) and two different inbred strains of mice (CBA and DBA) were used. The patterns of mortality varied between the different mouseparasite strain combinatio ns. The mortality of CBA mice infected with P. vinckei and P. berghei K152, and DBA mice infected with P. berghei ANKA, related to the levels of parasitaemia. However early mortality of CBA

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Harris, Jessica. "BODIPY dyes for singlet oxygen and optical limiting applications." Thesis, Rhodes University, 2018. http://hdl.handle.net/10962/58002.

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A series of structurally related BODIPY dyes were synthesised and characterised. Their photophysical properties were studied in order to determine whether they would be suitable candidates for use as photosensitisers in the photodynamic therapy (PDT) treatment of cancer. The synthesis of two highly fluorescent BODIPY cores was achieved via the acid-catalysed condensation of a pyrrole and a functionalised aldehyde. In order to promote intersystem crossing, and hence improve the singlet oxygen generation of these dyes, bromine atoms were added at the 2,6-positions of the BODIPY core. These dibro

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Seotsanyana-Mokhosi, Itumeleng. "Photosensitizing properties of non-transition metal porphyrazines towards the generation of singlet oxygen." Thesis, Rhodes University, 2001. http://hdl.handle.net/10962/d1006086.

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Metallophthalocyanine complexes containing non-transition metals are very useful as sensitizers for photodynamic therapy, a cure for cancer that is based on visible light activation of tumour localized photo sensitizers. Excited sensitizers generate singlet oxygen as the main hyperactive species that destroy the tumour. Water soluble sensitizers are sought after for the convenience of delivery into the body. Thus, phthalocyanine (pc), tetrapyridinoporphyrazines (tppa) and tetramethyltetrapyridinoporphyrazines (tmtppa) with non-transition central metal atoms of Ge, Si, Sn and Zn were studied. F

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Bucknall, Martin Paul Medical Sciences Faculty of Medicine UNSW. "Dityrosine as a biomarker of free radical induced oxidative damage in diseases of ageing." Awarded by:University of New South Wales. School of Medical Sciences, 2006. http://handle.unsw.edu.au/1959.4/30207.

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o,o???-Dityrosine (dityrosine), an oxidation product of tyrosine produced by reaction between tyrosyl radicals, is becoming established as a biomarker of free radical oxidative protein damage in vivo. Attempts to measure dityrosine concentrations in various physiological and pathological systems have produced varied and often contradictory results. Dityrosine concentrations in urine, plasma, cerebrospinal fluid (CSF) and brain tissue varying over three orders of magnitude have been reported, together with inconsistent claims of significant dityrosine elevation in several ageing-related patho

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Feng, Jinliu 1974. "Mitochondrial respiratory transportation is the key determinant of aging in Caenorhabditis elegans." Thesis, McGill University, 2001. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=32991.

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'The rate of living' hypothesis of aging speculates that the metabolic rate of a species ultimately determines its life expectancy. Using the nematode worm Caenorhabditis elegans as model system, mutation in twp-1 (t&barbelow;ime w&barbelow;arp) gene was found to significantly delay biological timing and remarkably increase mean and maximum life span. The rate of living in twp-1 is dramatically delayed in all the biological processes we tested, including rates of rhythmic adult behaviors, development, and reproduction. Oxygen consumption, which indicates metabolic rate of an organism, is reduc

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Lee, Fung-kwan, and 李鳳群. "Effects of æ-Lipoic acid on injury, production of nitric oxide and expression of caveolin-3 in the isolated rat heart subjected toischaemia and reperfusion." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2004. http://hub.hku.hk/bib/B30213915.

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Smith, Samson William. "Effects of Reactive Oxygen Species on Life History Traits of Caenorhabditis elegans." PDXScholar, 2012. https://pdxscholar.library.pdx.edu/open_access_etds/712.

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Evolutionary life history theory predicts that tradeoffs among fitness-related phenotypes will occur as a result of resource limitations and/or physiological constraints. Such tradeoffs are defined as the cost(s) incurred on one component of fitness (e.g., reproduction) by the increased expression of another fitness-related trait (e.g., longevity). Only recently have researchers begun to investigate the mechanistic bases of life history tradeoffs. A recent proposal is that reactive oxygen species (ROS) have a central role in shaping life history traits and tradeoffs. Research on disparate anim

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Callow, Lisa Jane. "Oxidative stress and antioxidant intake in HIV-related wasting." Thesis, McGill University, 2000. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=33385.

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Weight loss is a common occurrence in patients with human immunodeficiency virus (HIV) and contributes to further debilitation in the acquired immune deficiency syndrome (AIDS). Wasting syndrome (WS) is defined as 10% or more unintentional weight loss from usual body weight. The etiology of WS includes alterations in metabolism, which contribute to loss of lean body mass. Cytokine driven oxidative stress may play a critical role in the metabolic pathways that lead to HIV wasting. Studies have shown that that patients infected with HIV may have a depleted antioxidant (AO) defense system, the in

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Seele, Maria. "Association between antioxidant status and MnSOD Ala-9Val polymorphism in trained male athletes (rugby players) and sedentary male students controlled for antioxidant intake." Thesis, Stellenbosch : Stellenbosch University, 2007. http://hdl.handle.net/10019.1/19864.

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Thesis (MSc)--University of Stellenbosch, 2007.<br>ENGLISH ABSTRACT: The human body has developed an integrated antioxidant defence system to protect against free radical damage. Acute exercise may result in the increased generation of free radicals, including reactive oxygen species, and this may overwhelm antioxidant defence systems resulting in oxidative stress. However, it has been shown that individuals who undergo regular exercise training may have improved antioxidant capacity when compared to sedentary controls. Results from research regarding the association between antioxidant

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Libri sul tema "Active oxygen – Physiological effect"

Krauss, Stephen R. O₂xygen: Nature's most important dietary supplement. Kearney, NE: Morris Pub., 1999.

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Grisham, Matthew B. Reactive metabolites of oxygen and nitrogen in biology and medicine. Austin: R.G. Landes, 1992.

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K, Singal Pawan, ed. Oxygen radicals in the pathophysiology of heart disease. Boston: Kluwer Academic Publishers, 1988.

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N, Smirnoff, ed. Antioxidants and reactive oxygen species in plants. Oxford, UK: Blackwell Pub., 2005.

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Elstner, Erich. Der Sauerstoff: Biochemie, Biologie, Medizin. Mannheim: BI-Wissenschaftsverlag, 1990.

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Gupta, S. Dutta. Reactive oxygen species and antioxidants in higher plants. Enfield, NH: Science Publishers, 2010.

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G, Simic Michael, ed. Oxygen radicals in biology and medicine. New York: Plenum Press, 1988.

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Frontiers in Basic Sciences That Relate to Heart, Lung, and Blood Diseases Symposium (8th 1986 Warren Grant Magnuson Clinical Center). Oxygen free radicals: Summary of Frontiers in Basic Sciences That Relate to Heart, Lung, and Blood Diseases Symposium : December 10-12, 1986, Masur Auditorium, Warren Grant Magnuson Clinical Center, National Institutes of Health : administrative report. [Bethesda, Md.?: The Institute, 1987.

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Barry, Halliwell, and Aruoma Okezie I. 1951-, eds. DNA and free radicals. New York: Ellis Horwood, 1993.

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Agricultural and Food Chemistry Division of the American Chemical Society Symposium on Antioxidant Nutrients and the Immune Response (1988 Los Angeles, Calif.). Antioxidant nutrients and immune functions. New York: Plenum Press, 1990.

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Capitoli di libri sul tema "Active oxygen – Physiological effect"

Pohlmann, Andreas, Kaixuan Zhao, Sean B. Fain, Pottumarthi V. Prasad, and Thoralf Niendorf. "Experimental Protocol for MRI Mapping of the Blood Oxygenation-Sensitive Parameters T2* and T2 in the Kidney." In Methods in Molecular Biology, 403–17. New York, NY: Springer US, 2021. http://dx.doi.org/10.1007/978-1-0716-0978-1_23.

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AbstractRenal hypoxia is generally accepted as a key pathophysiologic event in acute kidney injury of various origins, and has also been suggested to play a role in the development of chronic kidney disease. Here we describe a step-by-step experimental protocol for indirect monitoring of renal blood oxygenation in rodents via the deoxyhemoglobin sensitive MR parameters T2* and T2—a contrast mechanism known as the blood oxygenation level dependent (BOLD) effect. Since an absolute quantification of renal oxygenation from T2*/T2 remains challenging, the effects of controlled and standardized variations in the fraction of inspired oxygen are used for bench marking. This MRI method may be useful for investigating renal blood oxygenation of small rodents in vivo under various experimental (patho)physiological conditions.This chapter is based upon work from the COST Action PARENCHIMA, a community-driven network funded by the European Cooperation in Science and Technology (COST) program of the European Union, which aims to improve the reproducibility and standardization of renal MRI biomarkers. This experimental protocol chapter is complemented by two separate chapters describing the basic concept and data analysis.

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Sakamoto, Masako, Kazumasa Aoyagi, Sohji Nagase, Shoji Ohba, Mitsuhiro Miyazaki, Mitsuharu Narita, and Shizuo Tojo. "Effect of Active Oxygen on Guanidine Synthesis in Vitro." In Guanidines 2, 87–95. Boston, MA: Springer US, 1989. http://dx.doi.org/10.1007/978-1-4613-0821-8_11.

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Hayashi, Nobuya. "Growth Enhancement Effect of Gene Expression of Plants Induced by Active Oxygen Species in Oxygen Plasma." In Agritech: Innovative Agriculture Using Microwaves and Plasmas, 201–25. Singapore: Springer Singapore, 2022. http://dx.doi.org/10.1007/978-981-16-3891-6_12.

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Grinberg, Oleg Y., Minoru Miyake, Huagang Hou, Robert P. Steffen, and Harold M. Swartz. "The Dose-Dependent Effect of RSR13, a Synthetic Allosteric Modifier of Hemoglobin, on Physiological Parameters and Brain Tissue Oxygenation in Rats." In Oxygen Transport to Tissue XXIV, 287–96. Boston, MA: Springer US, 2003. http://dx.doi.org/10.1007/978-1-4615-0075-9_27.

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Kobayashi, J., M. Mukaida, Y. Tazoh, and S. Miyazawa. "The Effect of Active Atomic Oxygen on Preferential Orientation Axis for YBCO Films." In Advances in Superconductivity VII, 905–8. Tokyo: Springer Japan, 1995. http://dx.doi.org/10.1007/978-4-431-68535-7_204.

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Sheen, L. Y. "Effect of Sulfur-Containing Active Principles in Garlic on the Physiological Function of Hepatocytes." In Animal Cell Technology: Basic & Applied Aspects, 59–63. Dordrecht: Springer Netherlands, 2003. http://dx.doi.org/10.1007/978-94-017-0726-8_11.

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Nemoto, Edwin M., Richard Klementavicius, John A. Melick, and Howard Yonas. "Effect of Mild Hypothermia on Active and Basal Cerebral Oxygen Metabolism and Blood Flow." In Advances in Experimental Medicine and Biology, 469–73. Boston, MA: Springer US, 1994. http://dx.doi.org/10.1007/978-1-4615-1875-4_84.

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Chirkov, Yurii G., Oleg V. Korchagin, Vladimir N. Andreev, Vera A. Bogdanovskaya, and Viktor I. Rostokin. "Discharge of Lithium–Oxygen Power Source: Effect of Active Layer Thickness and Current Density on Overall Characteristics of Positive Electrode." In Computational Statistics and Mathematical Modeling Methods in Intelligent Systems, 52–69. Cham: Springer International Publishing, 2019. http://dx.doi.org/10.1007/978-3-030-31362-3_7.

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Hadem, Khetbadei Lysinia Hynniewta, Lakhon Kma, Rajeshwar N. Sharan, and Arnab Sen. "Anticancer Effect of Aristolochia tagala and Curcuma caesia Acting Through Tumor Necrosis Factor-a." In Handbook of Research on Advanced Phytochemicals and Plant-Based Drug Discovery, 366–94. IGI Global, 2022. http://dx.doi.org/10.4018/978-1-6684-5129-8.ch019.

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This chapter begins with a brief description of the events associated with carcinogenesis such as what led a normal cell to transform into a pre-neoplastic one, their multiplication, and development into cancer. The authors also described how reactive oxygen species (ROS) are generated endogenously and from carcinogens, their role in carcinogenesis, and the link between inflammation and cancer. Elucidation of how cancer arises contributes to understanding the molecular mechanisms of action of some natural products. Herbal natural products contain metabolites that exert a physiological action on human body. These metabolites are used therapeutically in modern medical practices to prevent and cure various diseases including cancer. This chapter discusses the anticancer property of two herbal plants Aristolochia tagala Cham. and Curcuma caesia Roxb. in diethylnitrosamine-induced mouse liver cancer and describes the most probable molecular mechanisms of action of the metabolites present in these plants contributing to their anticancer effect.

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Smail, Manal, Sunil Rupee, Khemraj Rupee, Abla Mohammed Ahmed Ismail, Sara Sultan, Frank Christopher Howarth, Ernest A. Adeghate, and Jaipaul Singh. "Effects of Diabetes Mellitus on the Conduction System of the Heart: Mini-Review." In New Insights on Cardiomyopathy [Working Title]. IntechOpen, 2022. http://dx.doi.org/10.5772/intechopen.109423.

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Diabetes mellitus can induce substantial damage to the conduction system of the heart, especially the sinoatrial node. This is due to hyperglycemia leading to bradyarrhythmia. DM, via the elevation of HG, generates the production of a number of insulting agents in the myocardium known as reactive oxygen species and reactive carbonyl species, which elicit direct damage to neuro-filament-M and β2-adrenergic receptors in the conducting system as well as a number of cardiac contractile, cation transporting and channel proteins. One cation channel protein is the hyperpolarization-activated cyclic nucleotide-gated potassium channel. It encodes the protein responsible for the hyperpolarizing-activated current or the “funny current” that participates in spontaneous diastolic membrane depolarization in sinoatrial node cells. Gene expression of these proteins and their physiological functions are decreased in the diabetic heart, which affects the generation of electrical impulses or action potentials resulting in increases in RR and PR intervals and QRS complex duration of the electrocardiogram. The heart rate and force of contraction of the myocardium are decreased leading to bradyarrhythmia and sudden cardiac death. This review attempts to explain the cellular mechanism(s) involved in diabetes-induced bradyarrhythmia with emphasis on cation-transporting proteins, especially the hyperpolarization-activated cyclic nucleotide-gated channels pacemaker current channels.

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Atti di convegni sul tema "Active oxygen – Physiological effect"

Liu, Tzu-Ming. "Near Infrared Active Nanomaterials for the Theragnosis of Tumors In Vivo." In JSAP-OSA Joint Symposia. Washington, D.C.: Optica Publishing Group, 2017. http://dx.doi.org/10.1364/jsap.2017.5p_a409_6.

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With the engineering of nanomaterials, they become dipolar active to near infrared (NIR) light and form valuable contrasts for deep tissue in vivo imaging at a sub-cellular resolution. The involved physical mechanisms include plasmonic resonance, quantum confinement effects, d-band transition, metal-to-semiconductor transition, bandgap alignment, and lifetime quenching. Some materials can even have multiple contrasts for different molecular imaging modalities like positron emission tomography, magnetic resonance imaging, and computed X-ray tomography. Not only serving as contrast agents in opt

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Ley, Obdulia, and Yildiz Bayazitoglu. "Effect of Physiological Parameters on the Temperature Distribution of a Layered Head Model." In ASME 2002 International Mechanical Engineering Congress and Exposition. ASMEDC, 2002. http://dx.doi.org/10.1115/imece2002-32044.

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Brain temperature control is important in clinical therapy, because moderate temperature reduction of brain temperature increases the survival rate after head trauma. A factor that affects the brain temperature distribution is the cerebral blood flow, which is controlled by autoregulatory mechanisms. To improve the existing thermal models of brain, we incorporate the effect of the temperature over the metabolic heat generation, and the regulatory processes that control the cerebral blood perfusion and depend on physiological parameters like, the mean arterial blood pressure, the partial pressu

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Che, Meng, Ya Luo, Cong Ge, Ya'Jie Ling, Qin Mo, Shu Luo, and Hao'Ru Tang. "Effect of astaxanthin on Strawberry Seedlings under low temperature stress on active oxygen metabolism." In 2017 3rd International Forum on Energy, Environment Science and Materials (IFEESM 2017). Paris, France: Atlantis Press, 2018. http://dx.doi.org/10.2991/ifeesm-17.2018.384.

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de Vries, Heder, Soephie Coenen, Frouke Kingma, Leo Heunks, and Angelique De Man. "The effect of oxygen on the PaO2/FiO2-ratio and shunt fraction in patients on mechanical ventilation: a physiological study." In ERS International Congress 2020 abstracts. European Respiratory Society, 2020. http://dx.doi.org/10.1183/13993003.congress-2020.351.

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QIN, Lang, and Jin YIN. "Physiological and Biochemical Effect of Endurance Training of Altitude Training on Fixed Maximal Oxygen Expenditure in Middle and Long Distance Runners." In 2nd International Conference on Biomedical and Biological Engineering 2017 (BBE 2017). Paris, France: Atlantis Press, 2017. http://dx.doi.org/10.2991/bbe-17.2017.50.

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Wai, Htet Su, Testsuya Ueda, and Chaoyang Li. "Oxygen Ratio Effect on Zinc Oxide Films Fabricated by Radio Frequency Magnetron Sputtering for Photoluminescence Type Gas Sensor Application." In 2021 28th International Workshop on Active-Matrix Flatpanel Displays and Devices (AM-FPD). IEEE, 2021. http://dx.doi.org/10.23919/am-fpd52126.2021.9499209.

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Madhusweta Das and P K NAMITHA. "Effect of Incorporation of Antioxidant/Oxygen Scavenger in Self-Supported Potato Starch Based Active Packaging Film on Storability of Some Foods." In 2009 Reno, Nevada, June 21 - June 24, 2009. St. Joseph, MI: American Society of Agricultural and Biological Engineers, 2009. http://dx.doi.org/10.13031/2013.26964.

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Frotscher, M., M. Kiekbusch, S. Mews, A. Knopp, and D. Serowietzki. "Influence of Active Af on the Fatigue Performance of Peripheral Stents Subjected to Physiological Loading Conditions." In SMST2022. ASM International, 2022. http://dx.doi.org/10.31399/asm.cp.smst2022p0043.

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Abstract The temperature difference between active austenite finish temperature, Af, and the intended operating temperature in the range of 3.2 °C to 20.8 °C. has been reported to have an influence on the fatigue lifetime of a pseudoelastic shape-memory device. The negative effect on fatigue life increases with the temperature difference between active Af and, in case of a biomedical device, 37 °C body temperature. In this study, samples were prepared and processed in a manner to replicate aspects of the complex manufacturing process, device design, and geometry of state-of-the-art stents, and

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Smolensky, A. V., A. B. Miroshnikov, A. D. Formenov, and A. G. Antonov. "EFFECT OF THERMAL STRESS ON THE PHYSICAL QUALITY OF TRAINED MEN: PILOT STUDY." In Х Всероссийская научно-практическая конференция. Nizhnevartovsk State University, 2021. http://dx.doi.org/10.36906/fks-2020/57.

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The question of the recreational effect of ambient temperature on most of the body's vital processes is often raised, which makes it the most important environmental factor, adaptation to which can be decisive for the body's adaptive capabilities. In our work, we evaluated the effect of using a sauna at + 85°C after tests for maximum performance and physiological characteristics in healthy, physically active men.

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Premasiri, A., G. Happawana, and A. Rosen. "Porous Media Tumor Model for Light Penetration and Oxygen Diffusion During Photodynamic Therapy." In ASME 2008 International Mechanical Engineering Congress and Exposition. ASMEDC, 2008. http://dx.doi.org/10.1115/imece2008-66480.

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Photodynamic therapy (PDT) is an FDA approved, effective, and minimally invasive cancer treatment modality with few side effects. PDT requires three major components; photosensitizing agent, activation light, and molecular oxygen. Optimization of PDT for an individual patient requires good therapeutic selectivity and high efficacy, where the design of such an effective protocol is based on the understanding of the interaction of key therapeutic components with tumor tissue. Tumor models expressive of changes during the growth of tumor along with the behavior of PDT components facilitate the ab

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Rapporti di organizzazioni sul tema "Active oxygen – Physiological effect"

Pesis, Edna, Elizabeth J. Mitcham, Susan E. Ebeler, and Amnon Lers. Application of Pre-storage Short Anaerobiosis to Alleviate Superficial Scald and Bitter Pit in Granny Smith Apples. United States Department of Agriculture, January 2013. http://dx.doi.org/10.32747/2013.7593394.bard.

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There is increased demand for high quality fruit produced and marketed with reduced chemical inputs to minimize toxic effects on human health and the environment. Granny Smith (GS) apple quality is reduced by two major physiological disorders, superficial scald and bitter pit (BP). These disorders cause great loss to apple growers worldwide. Superficial scald is commonly controlled by chemical treatments, mainly the antioxidant diphenylamine (DPA) and/or the ethylene action inhibitor, 1-methylcyclopropene (1–MCP). Both chemicals are ineffective in controlling bitter pit incidence. We proposed

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Prusky, Dov, Lisa Vaillancourt, and Robert Fluhr. Host Ammonification by Postharvest Pathogens and its Contribution to Fungal Colonization and Symptom Development. United States Department of Agriculture, December 2006. http://dx.doi.org/10.32747/2006.7592640.bard.

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Postharvest decay of fruits and vegetables caused by pathogenic and saprophytic fungi significantly impairs the quality and quantity of fresh produce brought to market. Consequently, there is considerable interest in identifying factors that determine the susceptibility of these commodities to pathogen infection. Insidious postharvest decays remain quiescent during fruit growth and harvest, but activate during the postharvest period. A key response to the physiological changes occurring during fruit ripening is the initiation of ammonium secretion by the pathogen. Ammonium ions at the infectio

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Elmann, Anat, Orly Lazarov, Joel Kashman, and Rivka Ofir. therapeutic potential of a desert plant and its active compounds for Alzheimer's Disease. United States Department of Agriculture, March 2015. http://dx.doi.org/10.32747/2015.7597913.bard.

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We chose to focus our investigations on the effect of the active forms, TTF and AcA, rather than the whole (crude) extract. 1. To establish cultivation program designed to develop lead cultivar/s (which will be selected from the different Af accessions) with the highest yield of the active compounds TTF and/or achillolide A (AcA). These cultivar/s will be the source for the purification of large amounts of the active compounds when needed in the future for functional foods/drug development. This task was completed. 2. To determine the effect of the Af extract, TTF and AcA on neuronal vulnerabi

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Rafaeli, Ada, and Russell Jurenka. Molecular Characterization of PBAN G-protein Coupled Receptors in Moth Pest Species: Design of Antagonists. United States Department of Agriculture, December 2012. http://dx.doi.org/10.32747/2012.7593390.bard.

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The proposed research was directed at determining the activation/binding domains and gene regulation of the PBAN-R’s thereby providing information for the design and screening of potential PBAN-R-blockers and to indicate possible ways of preventing the process from proceeding to its completion. Our specific aims included: (1) The identification of the PBAN-R binding domain by a combination of: (a) in silico modeling studies for identifying specific amino-acid side chains that are likely to be involved in binding PBAN with the receptor and; (b) bioassays to verify the modeling studies using mut

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Brosh, Arieh, David Robertshaw, Yoav Aharoni, Zvi Holzer, Mario Gutman, and Amichai Arieli. Estimation of Energy Expenditure of Free Living and Growing Domesticated Ruminants by Heart Rate Measurement. United States Department of Agriculture, April 2002. http://dx.doi.org/10.32747/2002.7580685.bard.

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Research objectives were: 1) To study the effect of diet energy density, level of exercise, thermal conditions and reproductive state on cardiovascular function as it relates to oxygen (O2) mobilization. 2) To validate the use of heart rate (HR) to predict energy expenditure (EE) of ruminants, by measuring and calculating the energy balance components at different productive and reproductive states. 3) To validate the use of HR to identify changes in the metabolizable energy (ME) and ME intake (MEI) of grazing ruminants. Background: The development of an effective method for the measurement of

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Wideman, Jr., Robert F., Nicholas B. Anthony, Avigdor Cahaner, Alan Shlosberg, Michel Bellaiche, and William B. Roush. Integrated Approach to Evaluating Inherited Predictors of Resistance to Pulmonary Hypertension Syndrome (Ascites) in Fast Growing Broiler Chickens. United States Department of Agriculture, December 2000. http://dx.doi.org/10.32747/2000.7575287.bard.

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Background PHS (pulmonary hypertension syndrome, ascites syndrome) is a serious cause of loss in the broiler industry, and is a prime example of an undesirable side effect of successful genetic development that may be deleteriously manifested by factors in the environment of growing broilers. Basically, continuous and pinpointed selection for rapid growth in broilers has led to higher oxygen demand and consequently to more frequent manifestation of an inherent potential cardiopulmonary incapability to sufficiently oxygenate the arterial blood. The multifaceted causes and modifiers of PHS make

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Yahav, Shlomo, John Brake, and Orna Halevy. Pre-natal Epigenetic Adaptation to Improve Thermotolerance Acquisition and Performance of Fast-growing Meat-type Chickens. United States Department of Agriculture, September 2009. http://dx.doi.org/10.32747/2009.7592120.bard.

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: The necessity to improve broiler thermotolerance and performance led to the following hypothesis: (a) thethermoregulatory-response threshold for heat production can be altered by thermal manipulation (TM) during incubation so as to improve the acquisition of thermotolerance in the post-hatch broiler;and (b) TM during embryogenesis will improve myoblast proliferation during the embryonic and post-hatch periods with subsequent enhanced muscle growth and meat production. The original objectives of this study were as follow: 1. to assess the timing, temperature, duration, and turning frequency r

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Uni, Zehava, and Peter Ferket. Enhancement of development of broilers and poults by in ovo feeding. United States Department of Agriculture, May 2006. http://dx.doi.org/10.32747/2006.7695878.bard.

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The specific objectives of this research were the study of the physical and nutritional properties of the In Ovo Feeding (IOF) solution (i.e. theosmostic properties and the carbohydrate: protein ratio composition). Then, using the optimal solution for determining its effect on hatchability, early nutritional status and intestinal development of broilers and turkey during the last quarter of incubation through to 7 days post-hatch (i.e. pre-post hatch period) by using molecular, biochemical and histological tools. The objective for the last research phase was the determination of the effect of

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Avni, Adi, and Gitta L. Coaker. Proteomic investigation of a tomato receptor like protein recognizing fungal pathogens. United States Department of Agriculture, January 2015. http://dx.doi.org/10.32747/2015.7600030.bard.

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Maximizing food production with minimal negative effects on the environment remains a long-term challenge for sustainable food production. Microbial pathogens cause devastating diseases, minimizing crop losses by controlling plant diseases can contribute significantly to this goal. All plants possess an innate immune system that is activated after recognition of microbial-derived molecules. The fungal protein Eix induces defense responses in tomato and tobacco. Plants recognize Eix through a leucine-rich-repeat receptor- like-protein (LRR-RLP) termed LeEix. Despite the knowledge obtained from

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Steffens, John C., and Eithan Harel. Polyphenol Oxidases- Expression, Assembly and Function. United States Department of Agriculture, January 1995. http://dx.doi.org/10.32747/1995.7571358.bard.

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Polyphenol oxidases (PPOs) participate in the preparation of many plant products on the one hand and cause considerable losses during processing of plant products on the other hand. However, the physiological functions of plant PPO were still a subject of controversy at the onset of the project. Preliminary observations that suggested involvement of PPOs in resistance to herbivores and pathogens held great promise for application in agriculture but required elucidation of PPO's function if modulation of PPO expression is to be considered for improving plant protection or storage and processing

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