impairment of alveolar gas exchange

... Caemmerer S & Farquhar G.D (1981) Some relationships between the biochemistry of photosynthesis and the gas exchange of leaves Planta 153, 376-387 von ... Field C & Vasquez-Yanes C (1984) Photosynthetic characteristics of wet tropical forest plants In: Physiological Ecology of Plants of the Wet Tropics (Medina E., et al., eds.), Dr W Junk Pubi., ... 9th leaf of different palm trees (last leaf fully opened is numbered ) Light was the only limiting factor Relative error of measurements in low light was too high to allow a comparison of apparent...

Ngày tải lên: 09/08/2014, 04:20

... analysed in groups of four, which resulted in two values per experimental treatment 2.6 Leaf gas exchange and leaf nitrogen content Leaf gas exchange was measured during the third week of August in ... drained loam of pH 4−5, having a northern aspect with slopes of 8−15 % Herbaceous vegetation is dominated by a mixture of grasses (mainly Poa spp., Carex spp.) covering about 65% of soil and forbs ... response of the aerial part of the tree (e.g [9, 26, 30, 40]) However, during the establishment phase a good and rapid development of the plant root system is critical for the success of these...

Ngày tải lên: 07/08/2014, 16:20

... 1998 and during the second year, the effect of infection on gas- exchange was not detected in spite of the progress of the disease in inocu- 28 3.2 Gas exchange 98 Figure Canker length progression ... Experimentals de la UB Effects of pathogens on holm oak gas- exchange for technical assistance and R Rycroft, (Servei d’Assesorament Lingüístic of the University of Barcelona), for correcting the ... Chronology of gas exchange effects and growth effects of infection by Verticillium dahliae in potato, Phytopathology 81 (1991) 301–310 [6] Bowden R.L., Rouse D.I., Effects of Verticillium dahliae on gas...

Ngày tải lên: 08/08/2014, 14:21

... Three-way analysis vest time, exchange All gas showed variations with the course of the growing season and (P 0.0001) the relative stage of development of the leaves (figure 1) exchange parameters < ... support the hypothesis of a lack of acclimation of gas exchange at elevated [CO Dark respiration as mea] sured on spring (maintenance respiration only) and summer leaves at the end of the experiment ... absence of downward photosynthetic acclimation is similar to the findings of other studies on woody species [2] No downward trend of photosynthesis was shown through length of exposure, portion of...

Ngày tải lên: 08/08/2014, 14:21

... relations, gas exchange, and needle morphology of mature ponderosa pine trees, Can J For Res 23 (1993) 749-755 [10] Cregg B.M., Carbon allocation, gas exchange, and needle morphology of Pinus ponderosa ... Appreciable differences in the gas exchange rates between trees and limitations of measuring equipments [14] make difficult the detection of provenance differences At the end of the growing period, differences ... content (Nseeds, mg) Seasonal variations of temperature and air relative humidity as well as water supply regime highly influenced gas exchange Within-day gradient of temperature (≤ ºC) did not influence...

Ngày tải lên: 08/08/2014, 14:21

... coordinates of the trees in the stand, the gas exchange of a cluster of trees with clumped leaf area similar to observation can be calculated Such clusters of trees were the subject of sapflow ... Based on measurements of needle gas exchange [17] and gas exchange of branches without needles and trunks [42], we have obtained a view on changing activity in carbon gain of the tree canopy compartment ... canopy gas exchange, decreases in needle gas exchange in the Fichtelgebirge are well documented in response to needle aging and the turnover of magnesium [39] Older needles can show a reduction of...

Ngày tải lên: 08/08/2014, 14:22

... INTRODUCTION of To understand and The objective of this study was to determine the effects of an increase in CO con2 centration on the carbon gain of Quercus suber seedlings We examined the effects of ... direction of the responses in a range of plant species In this paper, we investigate the L effects of elevated CO on Quercus suber seedlings, a Mediterranean evergreen oak Because the behaviour of a ... growth of a plant is increased by elevated CO (Eamus and Jarvis, 1989), but leaf gas exchange appear more unpredictable During long-term experiments (weeks or months), a down regulation of photosynthetic...

Ngày tải lên: 08/08/2014, 18:21

... slope of the net photosynthesis-light curves which is called apparent quantum yield and which approximates to the quantum yield of the leaf (number of moles of CO assimilated per mole of photons ... performance of rain forest species in their native habitat and analysis of their gas exchange Carnegie Inst Washington Year Book 71, 94-102 Boardman NK (1977) Comparative photosynthesis of sun and ... Thompson WA, 15, 299-315 Tsel’Niker YL (1977) Regulation of processes of CO exchange and morphogenesis of forest trees under conditions of shading Sov Plant Physiol 24, 43-48 Whitmore TC (1978)...

Ngày tải lên: 08/08/2014, 19:21

... near-equilibrium with the dynamics of water exchange of each treatment Initial analysis of variance therefore showed a systematic interaction between all main effects and day of measurement (analysis not ... effect of treatment conditions at or near equilibrium, the effects of treatments were evaluated by performing an analysis of variance on the data obtained on days and of treatment only Of the ... pattern of response between shoot conductance and net photosynthesis appears to be evidence of g controlling the rate of P by limiting n sW the supply of CO However, the computa tion of internal...

Ngày tải lên: 08/08/2014, 19:21

... = = by Langstr6m et al (1990) Gas exchange was then followed continuously to September 4th To evaluate gas exchange data, the average diurnal course of periods of 10 d before and after pruning ... Troeng E, Linder S, Langström B (1979) Gas exchange in a 20-year-old stand of Scots pine V Pilot study on the effects on gas exchange during the attack of pine shoot beetle (Tomicus piniperda ... middle of August, current needles were still a strong sink at the time of pruning at the end of July Consequently, when the current shoots were cut off, the main sink for photosynthetic products of...

Ngày tải lên: 08/08/2014, 23:22

... after over-drying a leaf disk during 48 h at 60 °C Each value of LWC is the mean of replicates Gas exchange measurements Whole leaf gas exchange was measured in an open system designed in the laboratory ... reoxidation of the primary electron acceptor of PSII during the onset of carbon reduction, and the latter results largely from thermal deexcitation of PSII associated with the building up of transthylakoidal ... obtained from gas exchange and chlorophyll fluorescence studies therefore appear contradictory: the evolution of (A, C relationship indi) i cated the appearance of mesophyll limitations of photosynthesis...

Ngày tải lên: 09/08/2014, 03:24

... Correlation between loss of turgor and accumulation of abscisic acid in detached leaves Planta 148, 174182 Raschke K (1979) Movements of stomata In: Physiology of Movements Encyclopedia of Plant Physiology, ... stomatal conductance of fully turgid wheat and sunflower plants Aust J Plant Physiol 13, 459-464 Gollan T, Turner N.C & Schulze E.D (1985) The responses of stomata and leaf gas exchange to vapour ... resistance of plants 11 Effects of root medium and time of day in barley and lupin Aust J Plant Physiol.11, 341-350 Passioura J.B & Tanner C.B (1985) Oscillations in apparent hydraulic conductance of...

Ngày tải lên: 09/08/2014, 04:20

... onset of the rainy season, and leaves last for about 8-9 mo, at which time water is no longer available in the upper part of the soil profile A portable system was used to measure gas exchange ... (1981) Some relationships between the biochemistry of photosynthesis and the gas exchange of leaves Planta 153, 376-387 von Zimmermann M.H ture of some (1978) Hydraulic architecdiffuse-porous trees ... efficiency of evergreen tropical savanna species is a consequence of relatively low total leaf surface area compared to the was amount of vascular tissue, rather than the consequence of wider and...

Ngày tải lên: 09/08/2014, 04:20

... and then declined The shape of the curve is similar to that for transpiration Conclusions Initiation and development of current yr needles affected the results of gas exchange measurements The ... decreased after 11 d All seedlings recovered 18 d after the onset of the experiment The patterns of g evolution at the constant temperature of 8.7°C and at a were throughout the experiment but the former ... photosynthetic capacity of the developing current yr needles is fairly low (Troeng and Linder, 1982) Enclosing them in a cuvette causes errors in A, E and g Soil temperature affected gas exchange pine...

Ngày tải lên: 09/08/2014, 04:20

... October 1986, Van Elsacker P & Impens (1986) Direct effects of simulated acid wet deposition on gas exchange of Norway spruce In: Direct Effects of Dry and Wet Deposition on Forest Ecosystems - in Particular ... addition of the ionic mix- ture The effect of acidic rain on the Gn of clone 1019 seemed to depend upon envi- ronmental and/or ecophysiological conditions (interaction pH x ions x d) A reduction of ... Results Treatment means, pooled for the whole summer, of net C0 exchange (CER) and needle conductance (Gn) of the clones are shown in Fig a, b C0 exchange rate was reduced for all clones at pH 4.0+...

Ngày tải lên: 09/08/2014, 04:20

... ± SEM of repeated annual measurenormal 1into of stratifiedshown agegas exchange characteristics (PaO under ments FEV >measurements concomitantly obtained , Annual Annual changes of gas exchange ... study of ours performed in a limited number of children with advanced stages of CF showed the interdependence of oxygenation, ventilation inhomogeneities and trapped gas assemblage [8] The aim of ... onset and course of deterioration of gas exchange in relation to changes in lung volume, ventilation distribution, trapped gas and airway obstruction, as well as the influence of specific genotypes...

Ngày tải lên: 12/08/2014, 14:20

... accompanied by impairment of pulmonary gas exchange and arterial oxygenation [3-6] From the studies reported in the horse to date, it is not possible to separate the relative contributions of pulmonary ... Fort Dodge Animal Health, Fort Dodge, IA, USA) Sampling of blood and expired gas for measurements of gas concentrations by the multiple inert gas elimination technique (MIGET) were performed in the ... concentration ratios of each gas (retention and excretion, respectively) depend http://www.actavetscand.com/content/51/1/22 on its blood -gas partition coefficient and the VA/Q (the ratio of alveolar ventilation,...

Ngày tải lên: 12/08/2014, 18:22

... WO: A Graphical Analysis of the Respiratory Gas Exchange Washington, DC: American Physiological Society; 1955 Riley RL, Cournand A: “Ideal” alveolar air and the analysis of ventilation/perfusion ... relationships In Pulmonary Gas Exchange Vol Edited by West JB New York: Academic Press; 1980:219-262 West JB: Ventilation/perfusion inequality and overall gas exchange in computer models of the lung Respir ... special software, so we are again at a crossroads Is the information from this more sophisticated approach worth the extra effort of measurements over a range of FIO2 coupled to use of a mathematical...

Ngày tải lên: 13/08/2014, 08:21

... exert its beneficial effects on gas exchange or it may be harmful because of the arteriovenous shunt it causes We have tested the effects of CPR on circulation and gas exchange with or without an ... reporting of laboratory CPR research A statement for healthcare professionals from a Task Force of the American Heart Association, the American College of Emergency Physicians, the American College of ... Cilag, Germany)) and propofol (1 mg/kg (propofol-®Lipuro 2%; B Braun, Melsungen, Germany)) Intubation and controlled ventilation with an inspired fraction of oxygen (FiO2) of 100% were performed...

Ngày tải lên: 13/08/2014, 15:21

... using the Microsoft Excel for Microsoft Professional Windows XP 14 14 1.4.4 Scope of research a) This study concentrates in 24 Oil gas and Mining companies listed on Hanoi Stock Exchange b) The ... front of General Assembly of Shareholders and Law Hence, the coordinating principles for the three above boards are: - Members of the Board of Directors, Board of Supervisor and Board of Management ... survey of some 100 companies listed on Hanoi and Ho Chi Minh Stock Exchanges, which together represent more than 90% of the combined market capitalization of these exchanges The goal of such...

Ngày tải lên: 04/12/2014, 08:49