76 research outputs found
Stopping a war: The fight of the French workers against the Moroccan campaign of 1925
https://stars.library.ucf.edu/prism/1288/thumbnail.jp
British labor bids for power: The historic Scarboro Conference of the Trades Union Congress
https://stars.library.ucf.edu/prism/1165/thumbnail.jp
Kahn v. Virginia Retirement System: The Impact of Rule 10b-5\u27s Corporate Disclosure Requirements on the Williams Act\u27s Tender Offer and Best Price Rules
The water balance components of undisturbed tropical woodlands in the Brazilian cerrado
Deforestation of the Brazilian cerrado region has caused
major changes in hydrological processes. These changes in water balance
components are still poorly understood but are important for making land
management decisions in this region. To better understand pre-deforestation
conditions, we determined the main components of the water balance for an
undisturbed tropical woodland classified as "cerrado sensu stricto denso".
We developed an empirical model to estimate actual evapotranspiration (ET)
by using flux tower measurements and vegetation conditions inferred from
the enhanced vegetation index and reference evapotranspiration. Canopy
interception, throughfall, stemflow, surface runoff, and water table level
were assessed from ground measurements. We used data from two cerrado sites,
Pé de Gigante (PDG) and Instituto Arruda Botelho (IAB). Flux tower
data from the PDG site collected from 2001 to 2003 were used to develop
the empirical model to estimate ET. The other hydrological processes were
measured at the field scale between 2011 and 2014 at the IAB site. The
empirical model showed significant agreement (<i>R</i><sup>2</sup> = 0.73) with observed
ET at the daily timescale. The average values of estimated ET at the IAB
site ranged from 1.91 to 2.60 mm day<sup>−1</sup> for the dry and wet seasons,
respectively. Canopy interception ranged from 4 to 20 % and stemflow
values were approximately 1 % of the gross precipitation. The average runoff
coefficient was less than 1 %, while cerrado deforestation has the
potential to increase that amount up to 20-fold. As relatively little excess
water runs off (either by surface water or groundwater), the water storage
may be estimated by the difference between precipitation and
evapotranspiration. Our results provide benchmark values of water balance
dynamics in the undisturbed cerrado that will be useful to evaluate past and
future land-cover and land-use changes for this region
Infectious Complications Are Associated With Alterations in the Gut Microbiome in Pediatric Patients With Acute Lymphoblastic Leukemia
Acute lymphoblastic leukemia is the most common pediatric cancer. Fortunately, survival rates exceed 90%, however, infectious complications remain a significant issue that can cause reductions in the quality of life and prognosis of patients. Recently, numerous studies have linked shifts in the gut microbiome composition to infection events in various hematological malignances including acute lymphoblastic leukemia (ALL). These studies have been limited to observing broad taxonomic changes using 16S rRNA gene profiling, while missing possible differences within microbial functions encoded by individual species. In this study we present the first combined 16S rRNA gene and metagenomic shotgun sequencing study on the gut microbiome of an independent pediatric ALL cohort during treatment. In this study we found distinctive differences in alpha diversity and beta diversity in samples from patients with infectious complications in the first 6 months of therapy. We were also able to find specific species and functional pathways that were significantly different in relative abundance between samples that came from patients with infectious complications. Finally, machine learning models based on patient metadata and bacterial species were able to classify samples with high accuracy (84.09%), with bacterial species being the most important classifying features. This study strengthens our understanding of the association between infection and pediatric acute lymphoblastic leukemia treatment and warrants further investigation in the future
Os perigos dos Negros Brancos: cultura mulata, classe e beleza eugênica no pós-emancipação (EUA, 1900-1920)
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