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Journal articles on the topic 'Partial Pressure of the CO2'

Author: Grafiati

Published: 4 June 2021

Last updated: 1 February 2022

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1

Beaudry, Randolph M. "EFFECT OF ELEVATED CARBON DIOXIDE LEVELS ON BLUEBERRY FRUIT RESPIRATION AND RESPIRATORY QUOTIENT." HortScience 27, no. 6 (1992): 676f—676. http://dx.doi.org/10.21273/hortsci.27.6.676f.

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Blueberry fruit were sealed in 0.00254 cm (1 mil) thick, 200 cm2 low density polyethylene pouches, which, in turn, were sealed in containers continually purged with gas mixtures containing 0, 20, 40 or 60 kPa CO2 and held at 15C. Sampling the gas composition of the enclosed package permitted accurate determination of O2 uptake, CO2 production and the respiratory quotient (RQ) despite the high background CO2 levels. O2 uptake was minimally affected by the CO2 treatments. CO2 production, however, increased at CO2 partial pressures over 20 kPa, resulting in an elevated RQ at 40 and 60 kPa CO2. Ra

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2

Jy, Schnader, Juan G, Howell S, Fitzgerald R, and Roussos C. "Arterial co2 partial pressure affects diaphragmatic function." Pediatric Pulmonology 1, no. 5 (1985): 288. http://dx.doi.org/10.1002/ppul.1950010525.

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3

Schnader, J. Y., G. Juan, S. Howell, R. Fitzgerald, and C. Roussos. "Arterial CO2 partial pressure affects diaphragmatic function." Journal of Applied Physiology 58, no. 3 (1985): 823–29. http://dx.doi.org/10.1152/jappl.1985.58.3.823.

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The purpose of this study was to examine in an in vivo preparation acute variations of PCO2 on diaphragmatic contractility. Plaster casts were snugly fit around the abdomen of six open-chested dogs, moving the abdominal contents rostrally. Diaphragmatic contractions against this very fixed load in response to phrenic nerve stimulation (supramaximal voltage at 1, 20, 50, and 80 Hz) or during spontaneous inspiratory efforts were virtually isometric (quasi-isometric). Transdiaphragmatic pressure (Pdi) measured by an abdominal balloon was used as an index of diaphragmatic contractility. Arterial P

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4

YAMASHITA, Kazuto, Yasushi SASAKI, Yasuharu IZUMISAWA, and Tadao KOTANI. "End-Tidal Partial Pressure of CO2 for Estimating Arterial Partial Pressure of CO2 during Inhalation Anesthesia in Dogs." Journal of the Japan Veterinary Medical Association 52, no. 1 (1999): 27–31. http://dx.doi.org/10.12935/jvma1951.52.27.

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5

Joles, Dennis W., Arthur C. Cameron, Ahmad Shirazi, Peter D. Petracek, and Randolph M. Beaudry. "Modified-atmosphere Packaging of `Heritage' Red Raspberry Fruit: Respiratory Response to Reduced Oxygen, Enhanced Carbon Dioxide, and Temperature." Journal of the American Society for Horticultural Science 119, no. 3 (1994): 540–45. http://dx.doi.org/10.21273/jashs.119.3.540.

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`Heritage' raspberries (Rubus idaeus L.) were sealed in low-density polyethylene packages and stored at 0, 10, and 20C during Fall 1990 and 1991 to study respiratory responses under modified atmospheres. A range of steady-state O2 and CO2 partial pressures were achieved by varying fruit weight in packages of a specific surface area and film thickness. Film permeability to O2 and CO2 was measured and combined with surface area and film thickness to estimate total package permeability. Rates of O2 uptake and CO2 production and respiratory quotient (RQ) were calculated using steady-state O2 and C

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6

Beaudry, Randolph M., Arthur C. Cameron, Ahmad Shirazi, and Diana L. Dostal-Lange. "Modified-atmosphere Packaging of Blueberry Fruit: Effect of Temperature on Package O2 and CO2." Journal of the American Society for Horticultural Science 117, no. 3 (1992): 436–41. http://dx.doi.org/10.21273/jashs.117.3.436.

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Highbush blueberry (Vaccinium corymbosum L. `Bluecrop') fruit sealed in low-density polyethylene packages were incubated at 0, 5, 10, 15, 20, or 25C until O2 and CO2 levels in the package reached a steady state. A range of steady-state O2 partial pressures (1 to 18 kPa) was created by placing a range of fruit weights within packages having a constant surface area and film thickness. The steady-state O2 partial pressure in packages containing the same weight of fruit decreased as temperature increased, indicating the respiratory rate rose more rapidly (i.e., had a greater sensitivity to tempera

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7

Silva, S. M., R. C. Herner, and R. M. Beaudry. "407 Regulation of Carbon Flux as a Function of O2 and CO2 Atmospheres in Asparagus Tips." HortScience 34, no. 3 (1999): 514B—514. http://dx.doi.org/10.21273/hortsci.34.3.514b.

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The purpose of this work was to investigate the influence of O2 and CO2 partial pressures on glycolytic carbon flux, phosphorylated intermediates, phosphate, pyrophosphate, and phosporylated nucleotides in asparagus spears tips stores at 1 °C. The effects of CO2 (0, 5, 10, and 20 kPa) combined with O2 pressures ranging from 0.1 to 16 kPa (1% O2 = 1.013 kPa O2 at 1 atm) were investigated. Spears were enclosed within a low-density polyethylene (LDPE) package (for the 5-, 10-, and 20-kPa CO2 treatments) having a surface area of 462 cm2 and enclosed in 1.95-L glass jars. Low O2 enhanced the interc

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8

Shi, Qing Hao, Bing Ying Wang, and Bin Zhao. "Effect of CO₂ on Anti-Corrosion Property of a Polyurea Coating Modified with Organosilicone." Materials Science Forum 789 (April 2014): 466–70. http://dx.doi.org/10.4028/www.scientific.net/msf.789.466.

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The corrosion mechanism of organic silicon modified polyurea composite coating under different CO2 partial pressures was studied using high-temperature autoclave, combined with scanning electron microscopy (SEM), adhesion tests and electrochemical impedance spectroscopy (EIS) technology. The experimental results showed that: there was no corrosion product formed on the surface of coating sample after high-temperature high-pressure corrosion test, and with the increasing of CO2 partial pressure, the coating adhesion and impedance values decline increases. Moreover CO2 partial pressure increases

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9

Palumbo, Gaetano, Kamila Kollbek, Roma Wirecka, Andrzej Bernasik, and Marcin Górny. "Effect of CO2 Partial Pressure on the Corrosion Inhibition of N80 Carbon Steel by Gum Arabic in a CO2-Water Saline Environment for Shale Oil and Gas Industry." Materials 13, no. 19 (2020): 4245. http://dx.doi.org/10.3390/ma13194245.

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The effect of CO2 partial pressure on the corrosion inhibition efficiency of gum arabic (GA) on the N80 carbon steel pipeline in a CO2-water saline environment was studied by using gravimetric and electrochemical measurements at different CO2 partial pressures (e.g., PCO2 = 1, 20 and 40 bar) and temperatures (e.g., 25 and 60 °C). The results showed that the inhibitor efficiency increased with an increase in inhibitor concentration and CO2 partial pressure. The corrosion inhibition efficiency was found to be 84.53% and 75.41% after 24 and 168 h of immersion at PCO2 = 40 bar, respectively. The s

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10

Li, Siyue, X. X. Lu, and Richard T. Bush. "CO2 partial pressure and CO2 emission in the Lower Mekong River." Journal of Hydrology 504 (November 2013): 40–56. http://dx.doi.org/10.1016/j.jhydrol.2013.09.024.

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11

Wang, Ying. "Effect of CO₂ Partial Pressure on CO₂/H₂S Corrosion of Oil Tube Steels." Advanced Materials Research 962-965 (June 2014): 407–10. http://dx.doi.org/10.4028/www.scientific.net/amr.962-965.407.

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The CO2/H2S corrosion behaviors of oil tube steels N80 and P110 at different CO2 partial pressure (45psi, 135psi, 225psi, 315psi) were investigated by corrosion tests, corrosion rate calculation and corrosion morphology observation. The results show that at different CO2 partial pressure, super-serious CO2/H2S corrosion occurs on steel N80 and steel P110. With the increase of CO2 partial pressure, the CO2/H2S corrosion rates of both steels increase gradually.

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12

Fayaz, Fahim, Ahmad Ziad Sulaiman, Sharanjit Singh, and Sweeta Akbari. "Effect of CO2 partial pressure on dry reforming of ethanol for hydrogen production." International Journal of Innovative Research and Scientific Studies 1, no. 1 (2018): 6–10. http://dx.doi.org/10.53894/ijirss.v1i1.3.

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The effect of CO2 partial pressure on ethanol dry reforming was evaluated over 5%Ce-10%Co/Al2O3 catalyst at = PCO2 = 20-50 kPa, PC2H5OH = 20 kPa, reaction temperature of 973 K under atmospheric pressure. The catalyst was prepared by using impregnation method and tested in a fixed-bed reactor. X-ray diffraction measurements studied the formation of Co3O4, spinel CoAl2O4 and CeO2, phases on surface of 5%Ce-10%Co/Al2O3 catalyst. CeO2, CoO and Co3O4 oxides were obtained during temperature–programmed calcination. Ce-promoted 10%Co/Al2O3 catalyst possessed high BET surface area of 137.35 m2 g-1. C2H

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13

da Costa, A. F., K. H. Tsui, Y. K. Huang, and C. A. Massone. "Partial pressure scaling law of CO2 laser efficiency." Applied Physics B 51, no. 3 (1990): 227–32. http://dx.doi.org/10.1007/bf00405745.

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14

Kieschnick, K., E. Steudel, and W. Weppner. "Intelligent sensor system for CO2 partial pressure measurements." Ionics 3, no. 5-6 (1997): 442–47. http://dx.doi.org/10.1007/bf02375722.

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15

Qiu, Zhichao, Chunming Xiong, Zhengrong Ye, et al. "Corrosion behavior of N80 steel in CO2-saturated formation water." Anti-Corrosion Methods and Materials 66, no. 4 (2019): 464–70. http://dx.doi.org/10.1108/acmm-10-2018-2005.

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Purpose This paper aims to explore the influence of CO2 partial pressure, flow rate and water cut on N80 steel corrosion behaviors in the displacement process of oil in glutenite reservoir by CO2 injection. Design/methodology/approach A self-made 3 L high-temperature and high-pressure autoclave was used to conduct corrosion simulation experiments of N80 steel in different CO2 partial pressures, flow rates and water cut (the independently developed oil and water mixing approach can ensure the uniform mixing of oil and water in experiments). Techniques like weight loss and surface analysis were

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16

Yan, Wei, Yong Xiang, Wenliang Li, and Jingen Deng. "Downhole CO2 partial pressure calculation and tubing material selection – a case study of an offshore oil field in the South China Sea." Anti-Corrosion Methods and Materials 63, no. 5 (2016): 414–20. http://dx.doi.org/10.1108/acmm-04-2016-1662.

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Purpose This paper aims to establish the downhole CO2 partial pressure profile calculating method and then to make an economical oil country tubular goods (OCTG) anti-corrosion design. CO2 partial pressure is the most important parameter to the oil and gas corrosion research for these wells which contain sweet gas of CO2. However, till now, there has not been a recognized method for calculating this important value. Especially in oil well, CO2 partial pressure calculation seems more complicated. Based on Dolton partial pressure law and oil gas separation process, CO2 partial pressure profile c

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17

Argo, William R., John A. Biernbaum, and William C. Fonteno. "Root Medium Carbon Dioxide and Oxygen Partial Pressures for Container-grown Chrysanthemums." HortScience 31, no. 3 (1996): 385–88. http://dx.doi.org/10.21273/hortsci.31.3.385.

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Medium CO2 and O2 partial pressures were measured at three locations [3.8 (top layer), 7.5 (middle layer), and 10.3 (bottom layer) cm below the rim] in 15-cm-tall pots containing flowering chrysanthemums [Dendranthem×grandiflorum (Ramat.) Kitamura] grown in one of three root media. Average ambient medium CO2 and O2 partial pressures were 63 Pa and 21 kPa, respectively, and were similar in the three sampled layers in root media with an average moisture content of 50% to 60% of container capacity. Within 10 minutes after a drip-irrigation application of well water containing a titratable alkalin

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18

Rödenbeck, C., R. F. Keeling, D. C. E. Bakker, et al. "Sea-air CO<sub>2</sub> flux estimated from SOCAT surface-ocean CO<sub>2</sub> partial pressure data and atmospheric CO<sub>2</sub> mixing ratio data." Ocean Science Discussions 9, no. 3 (2012): 2273–326. http://dx.doi.org/10.5194/osd-9-2273-2012.

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Abstract. Surface-ocean CO2 partial pressure data have been assimilated into a simple diagnostic model of surface-ocean biogeochemistry to estimate the spatio-temporal CO2 partial pressure field and ultimately the sea-air CO2 fluxes. Results compare well with the widely used monthly climatology by Takahashi et al. (2009) but also contain some short-term and interannual variations. Fitting the same model to atmospheric CO2 data yields less robust but consistent estimates, confirming that using the partial pressure based estimates as ocean prior in atmospheric CO2 inversions may improve land CO2

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19

KIM, Youngchur, and Tatsuya NOIKE. "Effect of CO2 Partial Pressure on the Anaerobic Digestion." Journal of Japan Society on Water Environment 19, no. 6 (1996): 491–500. http://dx.doi.org/10.2965/jswe.19.491.

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20

Wong, Suan-Chin. "Elevated atmospheric partial pressure of CO2 and plant growth." Photosynthesis Research 23, no. 2 (1990): 171–80. http://dx.doi.org/10.1007/bf00035008.

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21

Kullmann, T., I. Barta, Z. Lazar, et al. "Exhaled breath condensate pH standardised for CO2 partial pressure." European Respiratory Journal 29, no. 3 (2007): 496–501. http://dx.doi.org/10.1183/09031936.00084006.

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22

Zheng, Shu Qi, Chang Feng Chen, Li Qiang Chen, and Chun Yu Li. "Effect of H₂S/CO₂ Pressure on the Corrosion Behaviors of L360QCS in the Environments Containing Elemental Sulfur." Advanced Materials Research 399-401 (November 2011): 185–88. http://dx.doi.org/10.4028/www.scientific.net/amr.399-401.185.

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The weight-loss method was used to study the effect of H2S/CO2 pressure on the corrosion behaviors of L360QCS in the environments with the existence of elemental sulfur and H2S/CO2. The morphologies, compositions and structure of corrosion products formed at different partial pressures were studied by the means of SEM, EDS and XRD techniques. The results show that the existing of H2S/CO2 increases the corrosion rate sharply and the corrosion rate increase dependence on H2S/CO2 pressure. At low gas pressure the production is mainly cubic FeS crystal while that is square FeS crystal at high pres

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23

Talasila, Panchanadham C., Arthur C. Cameron, and Dennis W. Joles. "Frequency Distribution of Steady-state Oxygen Partial Pressures in Modified-atmosphere Packages of Cut Broccoli." Journal of the American Society for Horticultural Science 119, no. 3 (1994): 556–62. http://dx.doi.org/10.21273/jashs.119.3.556.

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In one set of modified-atmosphere (MA) packages of cut broccoli (Brassica oleracea L., Italica Group), O2 partial pressures ranged from 1.2 to 3.6 kPa at 0C [88 packages, 0.00268-cm-thick low-density polyethylene (LDPE) film, 600-cm2 film area, 40±0.5 g cut broccoli], and in another set (94 packages, same film and area as before, 25±0.5 g cut broccoli) they ranged from 5.0 to 9.2 kPa. For characterizing O2 uptake as a function of O2 partial pressure and determining anaerobic fermentation induction point at 0C, a range of steady-state package O2 partial pressures was generated by placing differ

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24

He, Chuanjiu, Fred T. Davies, and Ronald E. Lacey. "Hypobaria, hypoxia, and light affect gas exchange and the CO2 compensation and saturation points of lettuce (Lactuca sativa)This paper is one of a selection published in a Special Issue comprising papers presented at the 50th Annual Meeting of the Canadian Society of Plant Physiologists (CSPP) held at the University of Ottawa, Ontario, in June 2008." Botany 87, no. 7 (2009): 712–21. http://dx.doi.org/10.1139/b09-031.

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There are important engineering and crop production advantages in growing plants under hypobaric (reduced atmospheric pressure) conditions for extraterrestrial base or spaceflight environments. The objectives of this research were to determine the influence of hypobaria and reduced partial pressure of oxygen (pO2) (hypoxia) under low and high light irradiance on carbon dioxide (CO2) assimilation (CA), dark-period respiration (DPR), and the CO2 compensation and CO2 saturation points of lettuce (Lactuca sativa L. ‘Buttercrunch’). Plants were grown under variable total gas pressures [25 and 101 k

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25

Mahlobo, MGR, K. Premlall, and PA Olubambi. "Effect of CO2 partial pressure and different CO2 phases on carbon steel corrosion." IOP Conference Series: Materials Science and Engineering 272 (December 2017): 012032. http://dx.doi.org/10.1088/1757-899x/272/1/012032.

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26

Bai, Haitao, Yongqing Wang, Yun Ma, Qingbo Zhang, and Ningsheng Zhang. "Effect of CO2 Partial Pressure on the Corrosion Behavior of J55 Carbon Steel in 30% Crude Oil/Brine Mixture." Materials 11, no. 9 (2018): 1765. http://dx.doi.org/10.3390/ma11091765.

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The influence of CO2 partial pressure on the corrosion properties, including corrosion rate, morphology, chemical composition, and corrosion depth, of J55 carbon steel in 30% crude oil/brine at 65 °C was investigated. A corrosion mechanism was then proposed based on the understanding of the formation of localized corrosion. Results showed that localized corrosion occurred in 30% crude oil/brine with CO2. The corrosion rate sharply increased as the CO2 partial pressure (P co 2 ) was increased from 0 to 1.5 MPa, decreased from P co 2 = 1.5 MPa to P co 2 = 5.0 MPa, increased again at P co 2 = 5.0

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27

Shen, Qiuwan, Zicheng Shao, Shian Li, Guogang Yang, Jinliang Yuan та Xinxiang Pan. "Experimental Study of O2-Enriched CO2 Production by BaCo0.8B0.2O3−δ (B=Ce, Al, Fe, Cu) Perovskites Sorbent for Marine Exhaust CO2 Capture Application". Journal of Marine Science and Engineering 9, № 6 (2021): 661. http://dx.doi.org/10.3390/jmse9060661.

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An effective approach for reducing CO2 emissions from marine exhaust is adopting oxyfuel combustion technology. A series of B-site doped BaCo0.8B0.2O3−δ (B=Ce, Al, Fe, Cu) perovskites as novel oxygen carrier applications were prepared by the sol-gel method. The oxygen desorption characteristics of the B-site doped BaCo0.8B0.2O3−δ perovskites and the effects of adsorption/desorption temperature, CO2 volume flow rate, CO2 partial pressures, and adsorption time were researched in the fixed bed reactor. The surface morphology and size of the oxygen carrier was observed by scanning electron microsc

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28

Sun, Chong, Jian Bo Sun, Yong Wan, Xin Su, and Yong Zhang. "Corrosion Behaviors of 25CrMnVA Steel in CO₂ Flooding Enhanced Oil Recovery System." Advanced Materials Research 816-817 (September 2013): 1243–49. http://dx.doi.org/10.4028/www.scientific.net/amr.816-817.1243.

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Influences of temperature and CO2 partial pressure on CO2 corrosion behaviors of 25CrMnVA steel were investigated in the simulated oil field environments. The corrosion rates were measured under high temperature and high pressure condition. SEM, EDS and XRD were used to analyze the morphologies and characteristics of corrosion scales on the steels. The results shows that the corrosion rates of 25CrMnVA steel change little below 65°C, the corrosion feature is uniform corrosion. The corrosion rates increase rapidly after 65°C, mesa corrosion is found on the surface of steel. The corrosion rates

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29

Mertzlufft, F. O., L. Brandt, M. Stanton-Hicks, and W. Dick. "Arterial and Mixed Venous Blood Gas Status during Apnoea of Intubation — Proof of the Christiansen-Douglas-Haldane Effect in Vivo." Anaesthesia and Intensive Care 17, no. 3 (1989): 325–31. http://dx.doi.org/10.1177/0310057x8901700314.

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The Christiansen-Douglas-Haldane effect, in short the Haldane effect, describes the dependence of the CO2 binding of blood on the degree of oxygenation of haemoglobin. Under the physiological conditions of an ‘open’ system between blood and alveoli the partial pressure of arterial C02 (PaCO2), must be less than that of mixed venous blood (P[Formula: see text]CO2). During the unphysiological conditions of a ‘closed’ system, e.g. hyperoxic apnoea, i.e. continuous oxygen uptake without CO2 delivery by the lungs, the Paco2 will not only approximate the P[Formula: see text]CO2 but will even exceed

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30

Hou, Zhen Bo, Tian Hao Li, Xian Wei Lv, and Bing Ge Fu. "Influence of Imidazoline Inhibitor on CO₂ Corrosion of N80 Steel in Annulus Zone of Pump Recovery Well." Advanced Materials Research 1061-1062 (December 2014): 49–54. http://dx.doi.org/10.4028/www.scientific.net/amr.1061-1062.49.

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The impact of CO2 partial pressure ,fluid producing rate and corrosive medium on the CO2 corrosion regularity of N80 steel and the inhibition efficiency of imidazoline inhibitor are investigated respectively through simulation of the actual working environment in the mined-out space of mechanical oil production wells by using high temperature and pressure reactor. According to the results, the corrosion rate of metals increases with CO2 partial pressure but the inhibition efficiency of the inhibitor is hardly affected when CO2 partial pressure in the scope of 1~3MPa. The increase of the fluid

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31

Freiberger, J. J., B. J. Derrick, M. J. Natoli, et al. "Assessment of the interaction of hyperbaric N2, CO2, and O2 on psychomotor performance in divers." Journal of Applied Physiology 121, no. 4 (2016): 953–64. http://dx.doi.org/10.1152/japplphysiol.00534.2016.

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Diving narcosis results from the complex interaction of gases, activities, and environmental conditions. We hypothesized that these interactions could be separated into their component parts. Where previous studies have tested single cognitive tasks sequentially, we varied inspired partial pressures of CO2, N2, and O2 in immersed, exercising subjects while assessing multitasking performance with the Multi-Attribute Task Battery II (MATB-II) flight simulator. Cognitive performance was tested under 20 conditions of gas partial pressure and exercise in 42 male subjects meeting U.S. Navy age and f

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Latifah, Nurul, Sigit Febrianto, Anindya Wirasatriya, et al. "AIR-SEA FLUX OF CO2 IN THE WATERS OF KARIMUNJAWA ISLAND, INDONESIA." Saintek Perikanan : Indonesian Journal of Fisheries Science and Technology 16, no. 3 (2020): 171–78. http://dx.doi.org/10.14710/ijfst.16.3.171-178.

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The purpose of this study was to determine the distribution of CO2 flux in Karimunjawa in the east monsoon. The variables in this study were temperature; pH; salinity; DO; CO2 atm was measured using a CO2 meter; chlorophyll-a, phosphate, silicate were measured spectrophotometric method. Total Alkalinity / TA was measured using the titration method with the principle of changing pH; DIC (Dissolved Inorganic Carbon) was measured using CO2sys software. The partial pressure of seawater carbon dioxide calculated using formula: pCO2sea = 6.31T2 + 61,9 Chla2 – 365.85T – 94.41 Chl-a +5715.94, the part

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Song, Hakhyeon, Jun Tae Song, Beomil Kim, Ying Chuan Tan, and Jihun Oh. "Activation of C2H4 reaction pathways in electrochemical CO2 reduction under low CO2 partial pressure." Applied Catalysis B: Environmental 272 (September 2020): 119049. http://dx.doi.org/10.1016/j.apcatb.2020.119049.

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34

Ding, Ya-Long, Hua-Qin Wang, Chun-Gang Xu, and Xiao-Sen Li. "The Effect of CO2 Partial Pressure on CH4 Recovery in CH4-CO2 Swap with Simulated IGCC Syngas." Energies 13, no. 5 (2020): 1017. http://dx.doi.org/10.3390/en13051017.

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To investigate the influence of CO2 partial pressure on efficiency of CH4-CO2 swap from natural gas hydrates (NGHs), the replacement of CH4 from natural gas hydrate (NGH) is carried out with simulated Integrated Gasification Combined Cycle (IGCC) syngas under different pressures, and the gas chromatography (GC), in-situ Raman, and powder X-ray diffraction (PXRD) are employed to analyze the hydrate compositions and hydrate structures. The results show that with the P-T (pressure and temperature) condition shifting from that above the hydrate equilibrium curve of IGCC syngas to that below the hy

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35

Weber, Anderson, Auri Brackmann, Rogério de Olivera Anese, Vanderlei Both, and Elizandra Pivotto Pavanello. "'Royal Gala' apple quality stored under ultralow oxygen concentration and low temperature conditions." Pesquisa Agropecuária Brasileira 46, no. 12 (2011): 1597–602. http://dx.doi.org/10.1590/s0100-204x2011001200003.

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The objective of this work was to evaluate the interaction of ultralow oxygen concentrations (ULO) with storage temperatures and carbon dioxide partial pressures and its influence on fruit quality preservation and on the occurrence of physiological disorders in 'Royal Gala' apples. The experiment was carried out in a completely randomized design, with four replicates 25-fruit. ULO conditions (1.0 kPa O2 + 2.0 kPa CO2; 0.8 kPa O2 + 1.5 kPa CO2; 0.8 kPa O2 + 1.0 kPa CO2; 0.6 kPa O2 + 1.5 kPa CO2; and 0.6 kPa O2 + 1.0 kPa CO2) were tested at 0, 0.5 and 1.0°C, in a 5x3 factorial arrangement. Fruit

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36

Wong, SC, and FX Dunin. "Photosynthesis and Transpiration of Trees in a Eucalypt Forest Stand: CO2, Light and Humidity Responses." Functional Plant Biology 14, no. 6 (1987): 619. http://dx.doi.org/10.1071/pp9870619.

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Exchange of water vapour and CO2 was measured on a small group of trees in a 12-year-old regenerating forest dominated by Eucalyptus spp. in Kioloa State Forest, south-eastern New South Wales. The trees were growing in a weighing lysimeter (10.3 m2 ground area) with the dominant tree about 10 m high. A 12 m high enclosure made of polyethylene film was erected to enclose the trees on the lysimeter. Air was impelled in from the bottom of the enclosure by four fans at a total flow rate of 4.6 m3 s-1. Air samples for infrared gas analysers were taken 1, 4, 7 and 10 m above the ground. Pure CO2 (up

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Nechmi, Houssem Eddine, Michail Michelarakis, Abderrahmane (Manu) Haddad, and Gordon Wilson. "Clarifications on the Behavior of Alternative Gases to SF6 in Divergent Electric Field Distributions under AC Voltage." Energies 14, no. 4 (2021): 1065. http://dx.doi.org/10.3390/en14041065.

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Negative and positive partial discharge inception voltages and breakdown measurements are reported in a needle-plane electrode system as a function of pressure under AC voltage for natural gases (N2, CO2, and O2/CO2), pure NovecTM gases (C4F7N and C5F10O) and NovecTM in different natural gas admixtures. For compressed 4% C4F7N–96% CO2 and 6% C5F10O–12% O2–82% CO2 gas mixtures, the positive-streamer mode is identified as the breakdown mechanism. Breakdown and negative partial discharge inception voltages of 6% C5F10O–12% O2–82% CO2 are higher than those of 4% C4F7N–96% CO2. At 8.8 bar abs, the

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Alanazi, Nayef M., and Abdullah A. Al-Enezi. "The Effect of the Partial Pressure of H2S and CO2 on the Permeation of Hydrogen in Carbon Steel by Using Pressure Buildup Techniques." CORROSION 75, no. 10 (2019): 1207–15. http://dx.doi.org/10.5006/3128.

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There are concerns in the industry about using an electrochemical technique for actual hydrogen permeation measurements where charging current is not a field condition. The objective of this work is to use pressure buildup techniques to study the influence of H2S and CO2 partial pressure on the relationship between hydrogen permeation and corrosion rate measured by different techniques. Sulfide films formed on carbon steel in a solution containing 5 wt% NaCl and 0.5 wt% acidic acid at various H2S and CO2 partial pressures were characterized, and the effect of the film on hydrogen permeation wa

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Caemmerer, SV, and JR Evans. "Determination of the Average Partial Pressure of CO2 in Chloroplasts From Leaves of Several C3 Plants." Functional Plant Biology 18, no. 3 (1991): 287. http://dx.doi.org/10.1071/pp9910287.

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Measurements of CO2 and water vapour exchange by leaves were combined with measurements of carbon isotope composition (13C/12C) of CO2 in the air passing over the leaf. Carbon isotope discrimination during CO2 uptake was determined from the difference in carbon isotope composition of the air leaving the leaf chamber with or without a leaf enclosed. Leaves of wheat plants grown with different nitrogen nutrition and leaves of several other species were examined. The measurements, made at different irradiances for a given leaf, showed that carbon isotope discrimination was strongly correlated wit

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Kobayashi, Kenji, Tomohiko Omura, and Hisashi Amaya. "Effect of Buffer System on the Sulfide Stress Cracking Susceptibility of Low-Alloy Steel." Corrosion 74, no. 7 (2018): 788–800. http://dx.doi.org/10.5006/2626.

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The effects of a buffer system in test solution and CO2 partial pressure on sulfide stress cracking (SSC) susceptibility of low-alloy steel were investigated under pH 4.0 at 0.03 MPa H2S partial pressure. A double cantilever beam test was used to quantitatively evaluate SSC susceptibility. The corrosion rates and absorbed diffusible hydrogen concentration were also evaluated. Acetic acid/sodium acetate (acetate buffered solution) and carbonic acid/bicarbonate (bicarbonate buffered solution) buffered solutions were used as buffer systems in this study. From the results, in atmospheric pressure

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Tale, Sagar, Ramadan Ahmed, Rida Elgaddafi, and Catalin Teodoriu. "Sulfide Stress Cracking of C-110 Steel in a Sour Environment." Corrosion and Materials Degradation 2, no. 3 (2021): 376–96. http://dx.doi.org/10.3390/cmd2030020.

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The scope of this study includes modeling and experimental investigation of sulfide stress cracking (SSC) of high-strength carbon steel. A model has been developed to predict hydrogen permeation in steel for a given pressure and temperature condition. The model is validated with existing and new laboratory measurements. The experiments were performed using C-110 grade steel specimens. The specimens were aged in 2% (wt.) brine saturated with mixed gas containing CH4, CO2, and H2S. The concentration H2S was maintained constant (280 ppm) while varying the partial pressure ratio of CO2 (i.e., the

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Zhao, Jin Sheng, Ying Jun Ju, Mei Rong Tang, and Rong Huan Chen. "Experimental Study on the Corrosion Behavior of Produced Fluid on J55 Steel during CO₂ Flooding." Key Engineering Materials 773 (July 2018): 179–83. http://dx.doi.org/10.4028/www.scientific.net/kem.773.179.

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CO2 flooding has been widely used in oil field development, but the produced fluid is easy to cause corrosion of tubing and casing. In order to determine the corrosion behavior of produced fluid on J55 steel during CO2 flooding, we use the simulated oil well produced fluid as corrosive medium and conduct the corrosion simulation experiment at high temperature and high pressure. The experimental results showed that the crystalline grain size of corrosion film surface is different for the different CO2 partial pressure. When CO2 partial pressure is greater than the critical pressure, the crystal

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Brill, Richard W., and Peter G. Bushnell. "Effects of open- and closed-system temperature changes on blood oxygen dissociation curves of skipjack tuna, Katsuwonus pelamis, and yellowfin tuna, Thunnus albacares." Canadian Journal of Zoology 69, no. 7 (1991): 1814–21. http://dx.doi.org/10.1139/z91-250.

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Tunas often experience rapid temperature changes of 10 °C or more during their daily vertical movements. Their blood is therefore subjected to open-system (i.e., constant O2 and CO2 partial pressure, variable O2 and CO2 content) temperature changes during passage through the gills. In addition, tunas possess vascular countercurrent heat exchangers and can have deep red muscle temperatures as much as 20 °C above ambient. Their blood also experiences closed-system (i.e., constant O2 and CO2 content, variable O2 and CO2 partial pressure) temperature changes during passage through the heat exchang

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Wang, Ying, and Ping Li. "Effect of H₂S Partial Pressure on CO₂/H₂S Corrosion of Oil Tube Steels." Advanced Materials Research 239-242 (May 2011): 3131–34. http://dx.doi.org/10.4028/www.scientific.net/amr.239-242.3131.

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The CO2/H2S corrosion behaviors of oil tube steels N80 and P110 at different H2S partial pressure (0.2psi, 3psi, 9psi, 18psi) were investigated by autoclave corrosion tests, corrosion rate calculation and corrosion morphology observation. The results show that with the increase of H2S partial pressure the CO2/H2S corrosion rates of both steels increase at first and then decrease after the peaks appear at 3psi H2S.

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Kim, Kyoung Jae, Omar S. Bekdash, Jason R. Norcross, et al. "The Partial Pressure of Inspired Carbon Dioxide Exposure Levels in the Extravehicular Mobility Unit." Aerospace Medicine and Human Performance 91, no. 12 (2020): 923–31. http://dx.doi.org/10.3357/amhp.5608.2020.

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BACKGROUND: NASA has been making efforts to assess the carbon dioxide (CO2) washout capability of spacesuits using a standard CO2 sampling protocol. This study established the methodology for determining the partial pressure of inspired CO2 (PIco2) in a pressurized spacesuit. We applied the methodology to characterize PIco2 for the extravehicular mobility unit (EMU).METHODS: We suggested an automated and mathematical algorithm to find the end-tidal CO2 and the end of inspiration. We provided objective and standardized guidelines to identify acceptable breath traces, which are essential to accu

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Paul, Etienne, Daniel Mulard, Philippe Blanc, Jacques Fages, Gerard Goma, and Alain Pareilleux. "Effects of Partial O2 Pressure, Partial CO2 Pressure, and Agitation on Growth Kinetics of Azospirillum lipoferum under Fermentor Conditions." Applied and Environmental Microbiology 56, no. 11 (1990): 3235–39. http://dx.doi.org/10.1128/aem.56.11.3235-3239.1990.

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Luo, Jiachen, Siyue Li, Maofei Ni, and Jing Zhang. "Large spatiotemporal shifts of CO2 partial pressure and CO2 degassing in a monsoonal headwater stream." Journal of Hydrology 579 (December 2019): 124135. http://dx.doi.org/10.1016/j.jhydrol.2019.124135.

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Singh, Prachi, D. W. F. (Wim) Brilman, and Michiel J. Groeneveld. "Evaluation of CO2 solubility in potential aqueous amine-based solvents at low CO2 partial pressure." International Journal of Greenhouse Gas Control 5, no. 1 (2011): 61–68. http://dx.doi.org/10.1016/j.ijggc.2010.06.009.

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Modau, H., SC Wong, and CB Osmond. "Transient Depression of Photosynthesis in Bean Leaves During Rapid Water Loss." Functional Plant Biology 20, no. 1 (1993): 45. http://dx.doi.org/10.1071/pp9930045.

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The response of the photosynthetic capacity of mesophyll to a rapid loss of water from the leaf was evaluated by measuring transpiration, net CO2 uptake and temperature in dwarf bean leaves exposed to saturating CO2 partial pressures in a leaf chamber before and after cutting the petiole in air. Some plants were pre-exposed to low or high photon flux density, or to water deficit before measurements. During 3-5 min after cutting, when the turgorpassive opening of the stomata accelerated the water loss from the leaf, the rate of CO2 uptake was depressed; the depression was more pronounced in you

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Lefèvre, N., and G. F. Moore. "Distribution of the CO2 partial pressure along an Atlantic meridional transect." Progress in Oceanography 45, no. 3-4 (2000): 401–13. http://dx.doi.org/10.1016/s0079-6611(00)00010-0.

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