Sökning: "allometric scaling"

Hittade 4 uppsatser innehållade orden allometric scaling.

  1. 1. Advancing understanding of tropical forest carbon dynamics through improved allometric models for palms: A case study with Prestoea montana in Puerto

    Magister-uppsats, Uppsala universitet/Växtekologi och evolution; Uppsala universitet/Institutionen för biologisk grundutbildning

    Författare :Paschalis Chatzopoulos; [2021]
    Nyckelord :Above ground biomass; allometry; Luquillo Forest Dynamics Plot; Palms;

    Sammanfattning : Tropical forests are major components of Earth’s carbon stocks, but their diversity and structural complexity pose major challenges for making accurate estimates of their above ground biomass (AGB). Palms, in particular, are prominent and unique components of many tropical forests that have anatomical and physiological differences from dicot trees which affect their height - diameter allometry and consequently, our ability to accurately estimate their AGB. LÄS MER

  3. 2. A detailed study on Amazon Forest structure and mortality rates through LPJ-GUESS vegetation model

    Kandidat-uppsats, Lunds universitet/Institutionen för naturgeografi och ekosystemvetenskap

    Författare :Sara Mazzuoli; [2021]
    Nyckelord :Amazon s Forest; LPJ-GUESS; simulation; TEAM-NETWORK; dynamic vegetation model; observation; mortality; allometry; tree stand structure; biomass; cohort; PFTs; plant functional types; NPP; Earth and Environmental Sciences;

    Sammanfattning : Nowadays it has become relevant for scientists to understand the impact of tropical forest structure on the Global Carbon Cycle. Dynamic vegetation models have been developed to pursue this issue, specifically by improving algorithms that could analyze the allometry, biomass content and mortality rate of each singular simulated plant individual and how this responds to climate change, management and rising CO2 concentrations. LÄS MER

  4. 3. Individualization of fixed-dose combination regimens : Methodology and application to pediatric tuberculosis

    Master-uppsats, Uppsala universitet/Institutionen för farmaceutisk biovetenskap

    Författare :Gunnar Yngman; [2015]
    Nyckelord :pharmacometrics; pharmacokinetics; PK; population pharmacokinetics; optimal design; FDC; fixed-dose combination; pediatrics; tuberculosis; rifampicin; pyrazinamide; isoniazid; ethambutol; modeling; simulation; estimation; allometric scaling; stochastical simulation and estimation; NONMEM; MATLAB; FO; FOCE; Expectation-Maximization algorithm; importance sampling; Nelder-Mead method; logistic function; discontinuity; euclidean distance; Sammon mapping; global minimum; local minima;

    Sammanfattning : Introduction: No Fixed-Dose Combination (FDC) formulations currently exist for pediatric tuberculosis (TB) treatment. Earlier work implemented, in the software NONMEM, a rational method for optimizing design and individualization of pediatric anti-TB FDC formulations based on patient body weight, but issues with parameter estimation, dosage strata heterogeneity and representative pharmacokinetics remained. LÄS MER

  5. 4. Physiological ranges and variability in organ blood flow in laboratory animals

    Kandidat-uppsats, SLU/Dept. of Biomedical Sciences and Veterinary Public Health

    Författare :Camilla Anger; [2014]
    Nyckelord :organblodflöden; laboratoriedjur; farmakokinetik; regionala blodflöden; scaling; fysiologiska parametrar; organ blood flow; cardiac output; laboratory animals; physiologically based pharmacokinetics; microspheres; physiological parameters;

    Sammanfattning : BACKGROUND: Organ blood flow rates are useful in allometric scaling and for the application of Physiologically Based Pharmacokinetic Modeling (PBPK). These models are typically used for extrapolating pharmacokinetic data across different species, which has important applications in drug discovery and safety assessment. LÄS MER