Search results for "Stratification"

Zooplankton communities in doline lakes and pools, in relation to some bathymetric parameters and physical and chemical variables

1999

The zooplankton communities from several lakes and pools in three zones of a karstic area in central Spain were studied in spring and early autumn, in relation to morphometric, physical and chemical characteristics of the lakes. Zooplankton diversity was higher in autumn than in spring and it was positively correlated with lake size (area and depth) in spring, but not in early autumn. This effect is partially explained by the sharp zooplankton stratification in deep lakes, in early autumn. Some morphometric characteristics of lake basins were also correlated with the structure of zooplank- ton communities. Principal component analyses (PCA) and Two-Way Indicator Species Analysis (TWINSPAN) …

2001

The main limnological characteristics of the biogenic meromictic Lake La Cruz, a small karstic lake located on a dolomitic substrate, are outlined below. The lake owes its chemical stratification mainly to high concentrations of bicarbonate and calcium in the permanent monimolimnion, located below a depth of 19 m. A massive precipitation of CaCO3 crystals ("whiting"), occurring in the euphotic zone every summer, leads to further sedimentation and redissolution in deep waters with enhanced CO2 concentrations. Other ions, like magnesium, ammonium, reduced iron, silicate, etc. also contribute to the chemically-induced stability of the monimolimnion. The patterns of stratification during two co…

Right Ventricular Dysfunction Staging System for Mortality Risk Stratification in Heart Failure with Preserved Ejection Fraction

2020

Right ventricular dysfunction (RVD) parameters are increasingly important features in heart failure with preserved ejection fraction (HFpEF). We sought to evaluate the prognostic impact of a progressive RVD staging system by combining the tricuspid annular plane systolic excursion (TAPSE) to pulmonary artery systolic pressure (TAPSE/PASP) ratio with functional tricuspid regurgitation (TR) severity. We prospectively included 1355 consecutive HFpEF patients discharged for acute heart failure (HF). Of them, in 471 (34.7%) patients, PASP could not be accurately measured, leaving the final sample size to be 884 patients. Patients were categorized as Stage 1: TAPSE/PASP &ge

Expenses for Dwelling – Comparisons by Regions and Territories in Latvia

2021

The research was supported by the NATIONAL RESEARCH PROGRAMME “LATVIAN HERITAGE AND FUTURE CHALLENGES FOR THE SUSTAINABILITY OF THE STATE” project “CHALLENGES FOR THE LATVIAN STATE AND SOCIETY AND THE SOLUTIONS IN INTERNATIONAL CONTEXT" (INTERFRAME-LV, Project No.VPP-IZM-2018/1-0005).

Access to Higher Education: An Instrument for Fair Societies?

2019

Access to higher education (HE) has a long history. To offer a view on the current debates and worldwide issues regarding access to HE, this editorial depicts how the control of educational access has historically been used as an instrument of governance at the interface of two processes: social stratification and the territorialisation of politics. Access to HE has remained embedded in these large structural processes even though HE has expanded from a highly elitist institution into mass education systems with equity of educational opportunities having become a desirable goal across societies. Analysing these processes helps understand the complex mechanisms producing inequalities in HE t…

Mazā Baltezera ķīmiskās un fizikālās stratifikācijas raksturojums

2019

Maģistra darba mērķis ir analizēt Mazā Baltezera stratifikācijas raksturu un to ietekmējošos faktorus. Zināšanas par stratifikācijas procesiem ir noderīgas, lai pilnveidotu ezera apsaimniekošanu. Literatūras apskatā aprakstīta stratifikācijas loma ezeros, to ietekmējošie faktori, kā arī ezeru klasifikācija pēc to termiskā režīma. Izvirzīto uzdevumi izpildes vajadzībām veikti lauka un laboratorijas pētījumi, pielietotas grafiskās, t. sk. kartogrāfiskās, un matemātiskās datu apstrādes metodes. Stratifikācijas analīze veikta, atsevišķi apskatot ezera termisko, ķīmisko un izšķīdušā skābekļa stratifikāciju. Secinājums: Mazajā Baltezerā pastāv termiskā stratifikācija, kuras ietekmē pastāv arī ķīm…

Racial Stratification of Traditional Medicine’s Consumption in South Africa

2018

Introduction: Post-apartheid South Africa remains highly stratified on variable grounds including race. The 8.9 percent (whites) of the total population has an average income per capita that is five times higher than that of 79.2 percent (blacks). Socio-economic inequalities are embedded in a ‘culture of consumption’ which includes the availability of goods for sale and the marketization of basic human life experiences including health. Study Objective: The objective of this review was to ascertain the racial status quo in traditional medicines consumption. Results: Literature shows that the consumption of traditional medicines is saturated within the Black population at 72 percent whilst d…

Increasing air temperature relative to water temperature makes the mixed layer shallower, reducing phytoplankton biomass in a stratified lake

2023

The depth of the mixed layer is a major determinant of nutrient and light availability for phytoplankton in stratified waterbodies. Ongoing climate change influences surface waters through meteorological forcing, which modifies the physical structure of fresh waters including the mixed layer, but effects on phytoplankton biomass are poorly known. To determine the responses of phytoplankton biomass to the depth of the mixed layer, light availability and associated meteorological forcing, we followed daily changes in weather and water column properties in a boreal lake over the first half of a summer stratification period. Phytoplankton biomass increased with the deepening of the mixed layer …

“When You Live Here, That’s What You Get”: Other-, Ex-, and Non-Religious Outsiders in the Norwegian Bible Belt

2019

This article presents data from our investigations in Kristiansand, the largest city in Southern Norway, an area sometimes called Norway&rsquo

Immunological Markers for PML Prediction in MS Patients Treated with Natalizumab

2015

International audience; Natalizumab (NTZ), a monoclonal antibody recognizing the alpha4 integrin chain, has been approved for the treatment of active multiple sclerosis, but expose to the onset of a rare side effect, progressive multifocal leukoencephalopathy (PML). Estimating the individual risk of PML in NTZ-treated patients is a major challenge, and therapeutic strategies are mainly guided by the overall PML risk assessed by identified risk factors: JC virus (JCV) seropositivity, treatment duration (with peak incidence after 24 months), and the previous use of immunosuppressive therapies. Given that this stratification does not yet allow a precise individual prediction of PML, other pred…