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Showing 1 to 20 of 93 for “"Respiration rates"”.
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Changes in respiration rates and biomass attributes of epilithon due to extended exposure to zinc
… and function included estimates of ¹⁴C-glucose respiration, ¹⁴C-glutamate respiration, O₂ and CO₂ flux rates, ash-free dry weight (AFDW), protein, carbohydrate, and algal pigment concentrations, and total and zinc-tolerant colony forming units. An increase in epilithic glucose respiration per …
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Assessing Respiration Rates and Nutrient Dynamics of Aritifical Reef Biofilms and Bacterioplankton in the Mississippi Sound
… absence to examine bacterial growth, community respiration, and nutrient dynamics at four artificial reef habitats in the Mississippi Sound. Biofilm samples were also collected from settlement plates deployed at each site and were analyzed for 813C and 81sN stable isotope content. Respiration …
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Respiration rates and Factors which Influence the levels of Carbohydrates and Lipids in Honey Bee Eggs (<I>Apis mellifera </I>Linnaeus)
Respiration rates and changes in the amount of nutrients in queen-laid and worker-laid eggs of the honey bee, <I>Apis mellifera</I> L., were determined for the 3 days of embryonic development. Respiration was quantified by measuring the amount of CO₂ produced during 13 hr of artificial incubation …
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Microbial respiration on decaying leaves and sticks along an elevational gradient of a southern Appalachian stream
Microbial respiration on sticks and leaves, measured as oxygen uptake rate, was compared among four (2nd-4th order) sites along an elevational gradient at Coweeta Hydrologic Laboratory, North Carolina. Rhododendron and birch leaves were placed in mesh bags in the stream at each site on 21 Oct 90. …
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Evaluation of Two Lipid-Based Edible Coatings For Their Ability to Preserve Post Harvest Quality of Green Bell Peppers
… storage quality conditions tested included respiration rates, weight, color and texture changes, and stability of ascorbic acid (AA) and dehydroascorbic acid (DHA) content. Results indicated that no appreciable changes between days or treatment groups occurred in three of the parameters …
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Assessment of Estuarine Respiration and Benthic Nutrient Fluxes in Mississippi Sound
… variability of both water column and benthic respiration rates as well as benthic nutrient fluxes along the Mississippi Sound. Respiration was measured in recirculating incubation chambers using Firesting optical DO sensors (PyroScience GmbH), and changes in nutrient concentrations were …
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Finishing Processes for Zein Biodegradable Films
… applications for fresh produce of different respiration rates.
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Respiration during development and germination of muskmelon seeds (Cucumis melo L.)
Respiration rates of developing muskmelon (Cucumis melo L.) seeds were determined polarographically using a Clark-type O₂ electrode (Hansatech LD2). Seeds were obtained from fruits harvested 20, 30, 40, and 50 days after anthesis (DAA). Respiration (O₂ uptake) was measured for fresh intact seeds …
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Linking Heterotrophic Metabolism and Nutrient Uptake in Headwater Streams
… input, organic matter standing crops, litter respiration rates and nitrate demand several times during the course of decomposition. There was a strong relationship between leaf standing crop and nitrate uptake efficiency across dates with maximal efficiency occurring when litter standing crops …
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Morphological and Physiological Characteristics that Contribute to Insecticide Resistance in Bed Bug (Cimex lectularius L.) Eggs
… electron microscopy (SEM) and the chorion and respiration structures were identified. Scanning electron microscopy photographs and bed bug egg measurements indicated there were no morphological differences between different bed bug egg strains (susceptible and resistant). Bed bug egg …
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Bioindicators of Reductive Dechlorination in a Dehalococcoides ethenogenes-Containing Mixed Culture: Transcriptional Trends With Respect to Substrate Type, Substrate Concentration, and Culture Operation
… led to corresponding increases in chloroethene respiration rate. Regulation of steady-state transcript levels of most bioindicators was sensitive to chloroethene respiration rate and/or concentration. Within a limited range of respiration rates (1.5 ? 4.8 ?mol/L/hr), Fdh, Hup, TceA, PceA and …
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The effects of microplastic and natural particles on the invasive mussel Mytilus galloprovincialis (Lamarck, 1819) and the native Choromytilus meridionalis
… often occurs in areas prone to sand inundation. Respiration rates, byssus production, clearance rate, body condition (BCI) and survival of mussels exposed to four concentrations of two particle types, polyvinyl chloride (PVC) and red clay were measured. A significant concentration effect was …
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A Manometric Analysis of Metabolic Activity in the Developing Chick Yolk Sac
… one approach is an inspection of the changes in respiration during early stages of development. An analysis of these respiration rates may give a clue to some of the underlying mechanisms for morphogenesis,
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Determination of mechanism of zinc resistance in Chironomus riparius: a physiological/energetic approach
… for heavy metal resistance in aquatic invertebrates. Data were generated based on comparisons of growth and respiration experiments using instar III and IV Chironomus riparius under the influence of 0.0, 62.5, 125, 250, and 500 ppb zinc. Main comparisons were made between larvae that were …
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Aspects of the respiratory metabolism of juvenile rainbow trout (Oncorhynchus mykiss) at sustained swimming speeds
… indicated no detectable diurnal variation in the respiration rates of juvenile rainbow trout. Experiments investigating aerobic energy expenditure at sustained swimming speeds, through measurements of oxygen consumption rates, are described. Oxygen consumption was found to increase exponentially …
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Evaluating Scenarios That Can Startle and Surprise Pilots
… condition. During each condition, heart and respiration rate, flight performance, and subjective workload measures were collected. The startle and surprise condition showed the highest heart and respiration rates for both aircraft. However, there was no difference in either the heart or …
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Factors Affecting Short-term Oxygen Variability in the Northern Gulf of Mexico Hypoxic Zone
… in three aspects of short-term DO variability: respiration rates (i.e., how quickly bottom waters become hypoxic), persistence of hypoxia, and the dissipation of hypoxia (i.e., re-aeration events). I identified the range of respiration rates present at the study site, and showed how these rates …
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Using Silvopasture to Mitigate Heat Stress in Grazing Beef Cattle
… trial in East Texas. Data were collected on respiration rate, heart rate, heat stress scores, and behaviors including eating, ruminating, walking, and resting. Average respiration rates and behavior proportions did not differ significantly between treatments. Afternoon periods showed peak …
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Development and Effectiveness of Three Hydrocolloid-Lipid Emulsion Coatings on Preservation of Quality Characteristics in Green Bell Peppers
… during the 5-week storage period included: respiration rates, chlorophyll content, surface color, puncture force, pectin (uronic acid) content, ascorbic acid (AA) and dehydroascorbic acid (DHA) content, and cumulative weight loss. No significant differences between coated and uncoated …
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