22 research outputs found
Study of adsorption of cadmium ions from solutions on natural and modifi ed diatomites
The search for new technologies for the purification of natural and waste water does not lose its relevance. Biologically, heavy metals are among the most dangerous pollutants. The highest toxicity among them has cadmium, causing serious environmental problems during technogenic pollution of the aquatic environment, and its extraction is an urgent task. The analysis of foreign studies on the extraction of cadmium ions is carried out. The adsorption of cadmium has been studied by many authors and described in many works on kaolin oxides / iron hydroxides, in contrast to siliceous rocks. In this work, the use of the sorption method is proposed for the purification of wastewater from ions of heavy metals. The aim was to study the sorption activity of diatomite in relation to cadmium ions. The studies have been carried out under static conditions. The processes of physicochemical modification of diatomite for the extraction of cadmium ions from aqueous solutions have been investigated. The influence of time and pH on the value of sorption has been studied. The optimal conditions for sorption extraction have been determined. Adsorption isotherms have been constructed, and quantitative characteristics of the values of adsorption of cadmium ions on the surface of modified sorbents have been obtained. The fundamental possibility of using diatomites for the purification of cadmium-containing wastewater has been assessed. Based on the data obtained, it can be concluded that acid activation does not promote adsorption (even negative adsorption is observed), which confirms the mobility of cadmium in the low pH region, it can be assumed that only an increase in alkalinity to the possibility of formation of hydroxocadmium (CdOH)+. Thermal, shows stable adsorption in relation to Cd+2, which suggests the possibility of using such activation of cadmium diatomite and other metals, that is, with complex pollution
Π Π΅Π΄ΠΊΠΈΠΉ ΡΠ»ΡΡΠ°ΠΉ Π²Π΅ΡΡ ΡΡΠ΅ΡΠ½ΠΎΠΉ ΡΠΎΡΠΌΡ Π³ΠΈΠΏΠ΅ΡΡΡΠΎΡΠΈΡΠ΅ΡΠΊΠΎΠΉ ΠΊΠ°ΡΠ΄ΠΈΠΎΠΌΠΈΠΎΠΏΠ°ΡΠΈΠΈ Ρ Π²Π½ΡΡΡΠΈΠΆΠ΅Π»ΡΠ΄ΠΎΡΠΊΠΎΠ²ΠΎΠΉ ΠΎΠ±ΡΡΡΡΠΊΡΠΈΠ΅ΠΉ Ρ ΡΠ΅Π±Π΅Π½ΠΊΠ°
Hypertrophic cardiomyopathy is characterized by primary hypertrophy of myocardium without another cause such as arterial hypertension. We present a rare case of apical hypertrophic cardiomyopathy in 7-year-old girl with minimal nonspecific clinical manifestation (headache after loading). At planned examination typically ECG changes - pronounced repolarization changes and deep (about 10 mm) inverted T waves in precordial leads - were discovered. Transthoracic echocardiography detected local symmetric hypertrophy of left ventricular apex with reduced contractility of this area and intraventricular obstruction with pressure gradient between apical and middle parts of left ventricle 30 mm Hg. This findings were confirmed by ventriculograhy and myocardial scintigraphy. Cardiac magnetic resonance imaging determined marked fibrotic transformation of left ventricular apex. The features of this case are: the young age of the patient and combination of apical hypertrophy with intraventricular obstruction.ΠΠΈΠΏΠ΅ΡΡΡΠΎΡΠΈΡΠ΅ΡΠΊΠ°Ρ ΠΊΠ°ΡΠ΄ΠΈΠΎΠΌΠΈΠΎΠΏΠ°ΡΠΈΡ Ρ
Π°ΡΠ°ΠΊΡΠ΅ΡΠΈΠ·ΡΠ΅ΡΡΡ ΠΏΠ΅ΡΠ²ΠΈΡΠ½ΠΎΠΉ Π³ΠΈΠΏΠ΅ΡΡΡΠΎΡΠΈΠ΅ΠΉ ΠΌΠΈΠΎΠΊΠ°ΡΠ΄Π° ΠΏΡΠΈ ΠΎΡΡΡΡΡΡΠ²ΠΈΠΈ Π΄ΡΡΠ³ΠΈΡ
ΠΏΡΠΈΡΠΈΠ½ ΡΡΠΎΠ³ΠΎ, Π² ΡΠ°ΡΡΠ½ΠΎΡΡΠΈ Π°ΡΡΠ΅ΡΠΈΠ°Π»ΡΠ½ΠΎΠΉ Π³ΠΈΠΏΠ΅ΡΡΠ΅Π½Π·ΠΈΠΈ. ΠΡΠ΅Π΄ΡΡΠ°Π²Π»Π΅Π½ ΡΠ΅Π΄ΠΊΠΈΠΉ ΡΠ»ΡΡΠ°ΠΉ Π²Π΅ΡΡ
ΡΡΠ΅ΡΠ½ΠΎΠΉ Π³ΠΈΠΏΠ΅ΡΡΡΠΎΡΠΈΡΠ΅ΡΠΊΠΎΠΉ ΠΊΠ°ΡΠ΄ΠΈΠΎΠΌΠΈΠΎΠΏΠ°ΡΠΈΠΈ Ρ Π΄Π΅Π²ΠΎΡΠΊΠΈ 7 Π»Π΅Ρ Ρ ΠΌΠΈΠ½ΠΈΠΌΠ°Π»ΡΠ½ΡΠΌΠΈ Π½Π΅ΡΠΏΠ΅ΡΠΈΡΠΈΡΠ΅ΡΠΊΠΈΠΌΠΈ ΠΊΠ»ΠΈΠ½ΠΈΡΠ΅ΡΠΊΠΈΠΌΠΈ ΠΏΡΠΎΡΠ²Π»Π΅Π½ΠΈΡΠΌΠΈ (Π³ΠΎΠ»ΠΎΠ²Π½ΡΠ΅ Π±ΠΎΠ»ΠΈ, ΠΏΡΠΎΠ²ΠΎΡΠΈΡΡΠ΅ΠΌΡΠ΅ Π½Π°Π³ΡΡΠ·ΠΊΠ°ΠΌΠΈ). ΠΡΠΈ ΠΏΠ»Π°Π½ΠΎΠ²ΠΎΠΌ ΠΎΠ±ΡΠ»Π΅Π΄ΠΎΠ²Π°Π½ΠΈΠΈ Π±ΡΠ»ΠΈ ΠΎΠ±Π½Π°ΡΡΠΆΠ΅Π½Ρ ΡΠΈΠΏΠΈΡΠ½ΡΠ΅ ΠΈΠ·ΠΌΠ΅Π½Π΅Π½ΠΈΡ Π½Π° ΠΠΠ - Π²ΡΡΠ°ΠΆΠ΅Π½Π½ΡΠ΅ Π½Π°ΡΡΡΠ΅Π½ΠΈΡ ΡΠ΅ΠΏΠΎΠ»ΡΡΠΈΠ·Π°ΡΠΈΠΈ ΠΌΠΈΠΎΠΊΠ°ΡΠ΄Π° ΠΈ Π³Π»ΡΠ±ΠΎΠΊΠΈΠ΅ (Π΄ΠΎ 10 ΠΌΠΌ) ΠΎΡΡΠΈΡΠ°ΡΠ΅Π»ΡΠ½ΡΠ΅ Π·ΡΠ±ΡΡ Π’ Π² Π³ΡΡΠ΄Π½ΡΡ
ΠΎΡΠ²Π΅Π΄Π΅Π½ΠΈΡΡ
. Π’ΡΠ°Π½ΡΡΠΎΡΠ°ΠΊΠ°Π»ΡΠ½Π°Ρ ΡΡ
ΠΎΠΊΠ°ΡΠ΄ΠΈΠΎΠ³ΡΠ°ΡΠΈΡ Π²ΡΡΠ²ΠΈΠ»Π° Π»ΠΎΠΊΠ°Π»ΡΠ½ΡΡ ΡΠΈΠΌΠΌΠ΅ΡΡΠΈΡΠ½ΡΡ Π³ΠΈΠΏΠ΅ΡΡΡΠΎΡΠΈΡ Π²Π΅ΡΡ
ΡΡΠ΅ΡΠ½ΡΡ
ΠΎΡΠ΄Π΅Π»ΠΎΠ² Π»Π΅Π²ΠΎΠ³ΠΎ ΠΆΠ΅Π»ΡΠ΄ΠΎΡΠΊΠ° Ρ Π½Π°ΡΡΡΠ΅Π½ΠΈΠ΅ΠΌ ΠΈΡ
ΡΠΎΠΊΡΠ°ΡΠΈΠΌΠΎΡΡΠΈ ΠΈ Π²Π½ΡΡΡΠΈΠΆΠ΅Π»ΡΠ΄ΠΎΡΠΊΠΎΠ²ΡΡ ΠΎΠ±ΡΡΡΡΠΊΡΠΈΡ Ρ Π³ΡΠ°Π΄ΠΈΠ΅Π½ΡΠΎΠΌ Π΄Π°Π²Π»Π΅Π½ΠΈΡ ΠΌΠ΅ΠΆΠ΄Ρ Π²Π΅ΡΡ
ΡΡΠ΅ΡΠ½ΡΠΌ ΠΈ ΡΡΠ΅Π΄Π½ΠΈΠΌ ΠΎΡΠ΄Π΅Π»Π°ΠΌΠΈ 30 ΠΌΠΌ ΡΡ.ΡΡ., ΡΡΠΎ Π±ΡΠ»ΠΎ ΠΏΠΎΠ΄ΡΠ²Π΅ΡΠΆΠ΄Π΅Π½ΠΎ Π΄Π°Π½Π½ΡΠΌΠΈ Π²Π΅Π½ΡΡΠΈΠΊΡΠ»ΠΎΠ³ΡΠ°ΡΠΈΠΈ ΠΈ ΡΡΠΈΠ½ΡΠΈΠ³ΡΠ°ΡΠΈΠΈ ΠΌΠΈΠΎΠΊΠ°ΡΠ΄Π°. ΠΠ Π’ ΡΠ΅ΡΠ΄ΡΠ° ΠΏΠΎΠ·Π²ΠΎΠ»ΠΈΠ»Π° ΡΡΡΠ°Π½ΠΎΠ²ΠΈΡΡ Π½Π°Π»ΠΈΡΠΈΠ΅ Π²ΡΡΠ°ΠΆΠ΅Π½Π½ΠΎΠΉ ΡΠΈΠ±ΡΠΎΠ·Π½ΠΎΠΉ ΡΡΠ°Π½ΡΡΠΎΡΠΌΠ°ΡΠΈΠΈ Π²Π΅ΡΡ
ΡΡΠΊΠΈ Π»Π΅Π²ΠΎΠ³ΠΎ ΠΆΠ΅Π»ΡΠ΄ΠΎΡΠΊΠ°. ΠΡΠΎΠ±Π΅Π½Π½ΠΎΡΡΡΡ Π΄Π°Π½Π½ΠΎΠ³ΠΎ ΡΠ»ΡΡΠ°Ρ ΡΠ²Π»ΡΡΡΡΡ Π΄Π΅ΡΡΠΊΠΈΠΉ Π²ΠΎΠ·ΡΠ°ΡΡ ΠΏΠ°ΡΠΈΠ΅Π½ΡΠΊΠΈ ΠΈ ΡΠΎΡΠ΅ΡΠ°Π½ΠΈΠ΅ Π²Π΅ΡΡ
ΡΡΠ΅ΡΠ½ΠΎΠΉ Π³ΠΈΠΏΠ΅ΡΡΡΠΎΡΠΈΠΈ ΠΌΠΈΠΎΠΊΠ°ΡΠ΄Π° Ρ Π²Π½ΡΡΡΠΈΠΆΠ΅Π»ΡΠ΄ΠΎΡΠΊΠΎΠ²ΠΎΠΉ ΠΎΠ±ΡΡΡΡΠΊΡΠΈΠ΅ΠΉ
La dΓ©cision d'Γ©migrer
La situation démographique d'une région compte certainement parmi les facteurs les plus déterminants de l'émigration. Quand ils expliquent les raisons de leur départ, les migrants évoquent ordinairement le manque de logement, d'éducation et de formation professionnelle, les bas salaires et l'absence de loisirs organisés. Mais, au-delà de ces motifs et sans avoir à première vue de liens avec eux, on trouve souvent des phénomènes démographiques tels que la non-conformité entre le rythme de la c..
Applicability of the modified diatomite for treatment of wastewater containing heavy metals
The paper studies various modifications of diatomite, aiming at creating sorbents for wastewater purification from heavy metal ions. Diatomite of the Akhmatovskoe deposit of the Penza region was considered as a raw material. The processes of physical and chemical modification of diatomite were investigated. Adsorption isotherms were constructed, quantitative characteristics of adsorption of copper ions on the surface of modified sorbents were obtained. A chemical modification (acidic and alkaline) is proposed, which results in an increased adsorption capacity for heavy metal ions. The applicability of diatomite for the purification of highly concentrated wastewater containing heavy metals is shown
Simulated Solar Microwave Radiation Blocks the Formation of Biofilms
The article presents the results of the experimental study that was devoted to determining the blocking influence of the solar microwave radiation on the process of biofilm formation in Gram-positive and Gram-negative microorganisms. The microwave generator that allows simulating microwave βsplashes β of the Sun in the frequency range (4.0- 4.3 GHz) with the controlled inten-sity of radiation (from 50 Β΅W/sm2 to 500 Β΅W/sm2) was used for conducting this research. It is found out that the simulated solar radiation of the microwave range blocks the formation of the extracellular matrix by the opportunistic microorganisms. The results of this study confirm the hypothesis of the evolutionary nature of the leading role of the microwave radiation of the Sun in the life processes of organisms. The technology of the exposure on the microorganisms that was used in the experiment opens up the real prospects for reducing the persistent potential of mi-croorganisms and improving the efficiency of the bacterial infections treatment
Biodiversity of macrophyte communities and associated aquatic organisms in lakes of the Vologda Region (north-western Russia)
This paper provides current data on the biodiversity of boreal lakes of the Vologda Region (north-western Russia), including macrophytes (vascular plants and macroscopic algae) and macrophyte inhabitants (invertebrates and microalgae). The raw data, given in two datasets (Sampling event dataset and an Occurrence dataset) and presented in the form of GBIF-mediated data, were collected from 139 lakes (macrophytes between 2005 and 2021, macrophyte inhabitants between 2014 and 2020). The dataset contains materials on the diversity of vascular plants (Tracheophyta, 3225 occurrences; Bryophyta, 155; Marchantiophyta, 16), macro- and microalgae (Ochrophyta, 546 occurrences; Chlorophyta, 193; Charophyta, 153; Cyanobacteria, 139; Cryptophyta, 86; Myzozoa, 33; Euglenozoa, 27; Rhodophyta, 8; Bigyra, 1) and aquatic invertebrates (Arthropoda, 1408 occurrences; Annelida, 487; Mollusca, 263; Platyhelminthes, 36; Cnidaria, 11). This paper summarises previously unpublished materials in a standardised form.The paper summarises the data collected during the long-term phytodiversity studies in a series of lakes of different types (Vologda Region, north-western Russia). Data on algae and invertebrates diversity were obtained in 60 different plant communities of aquatic, semi-aquatic and coastal plants or their combinations. A total of 6787 occurrences were included in the dataset, published in the global biodiversity database (GBIF) for the first time. According to the GBIF taxonomic backbone, the dataset comprised 837 taxa, including 711 lower-rank taxa (species, subspecies, varieties, forms). New records of 47 species rare and protected in the Vologda Region are given: 43 species of plants, three species of animals and one species of Cyanobacteria
Synthesis of the Oligosaccharides Related to Branching Sites of Fucosylated Chondroitin Sulfates from Sea Cucumbers
Spring fires 2020 in Russia: Results from participatory burned area mapping with Sentinel-2 imagery
The dataset contains information about all fires that occurred on the territory of the Russian Federation from January 1 to May 15, 2020, when the first peak of spring fires ends for most regions. The contours of the fires were obtained by visual interpretation of Sentinel-2 MSI medium resolution satellite images (10-20 m / pixel) in a combination of Infra-Red (11-8-2) and Natural Color (4-3-2) channels at a scale of 1: 10,000 to 1: 50,000. For a more accurate determination of the boundaries of the territories covered by the fire, the images before and after the fire were compared during visual interpretations. FIRMS thermal anomalies were used as an additional source of information. The digitizing process was carried out by trained volunteers, the verification was done by the GIS Unit experts of the Greenpeace Russia and contracted GIS specialists
Colchicine in patients with heart failure and preserved left ventricular ejection fraction: rationale and design of a prospective, randomised, open-label, crossover clinical trial
Introduction Systemic low-grade inflammation is a fundamental pathophysiological mechanism of heart failure with preserved left ventricular ejection fraction (HFpEF). The efficacy of anti-inflammatory therapy in HFpEF is largely understudied. The aim of the study is to assess the anti-inflammatory effect of colchicine in HFpEF by looking at inflammatory biomarkers: high-sensitivity C reactive protein (hsCRP) and soluble suppression of tumorigenicity 2 (sST2).Methods and analysis This is a single-centre, prospective, randomised controlled, open-label, blinded-endpoint crossover clinical trial of stable but symptomatic patients with HFpEF. Patients will be randomised to either colchicine treatment 0.5βmg two times per day or usual care for 12 weeks followed by a 2-week washout period and crossover to 12 weeks of treatment with the alternate therapy. The primary objective is to investigate if administration of colchicine compared with usual care reduces inflammation in patients with HFpEF measured by primary endpoint sST2 and co-primary endpoint hsCRP at baseline and 12-week follow-up. Secondary objective is to determine if treatment with colchicine influences N-terminal pro-B-type natriuretic peptide levels, left ventricular diastolic function and remodelling, right ventricular systolic function and left atrial volumetric characteristics. We are aiming to enrol a total of 40 participants. This trial will answer the question if colchicine treatment reduces systemic low-grade inflammation and influences left ventricular diastolic function and remodelling with patients with HFpEF.Ethics and dissemination Ethical approval was obtained from the Ethics Committee of Sechenov University (reference: 03-22).Trial registration number NCT05637398