Search results for "General interest"
showing 10 items of 107 documents
Chronic Total Coronary Artery Occlusion Recanalisation with Percutaneous Coronary Intervention — Single Centre 10-Year Experience
2018
Abstract Coronary artery chronic total occlusions (CTO) are common — approximately one-third of patients with significant coronary artery disease on angiography have at least 1 CTO. Invasive treatment of these lesions still remain a major challenge for interventional cardiology due to their complexity. Historically, success rates have improved to about 60–70% by using only the traditional antegrade approach. The results have dramatically improved during the last decade after more widespread application of new retrograde techniques. The aim of our study was to review and analyse single hospital experience in CTO invasive treatment and to evaluate the long-term results. A total of 519 patient…
Assimilation of Selenium, Copper, and Zinc in Rye Malt
2018
Abstract Trace elements selenium, copper, and zinc are essential minerals for the human body. One of the means to increase the micronutrient content in diets is to add them to food raw materials, for example, to enrich grain with micronutrients during malt production. To obtain rye malt, 3 kg grain was soaked in 10 l water with addition of three mineral salts — sodium selenate (Na2SeO4), copper sulphate (CuSO4 5H2O), and zinc sulphate (ZnSO4 7H2O) at different concentrations and different combination of salts. The concentration of selenium, copper, and zinc was determined in rye malt. The obtained results were used to calculate the degree of assimilation of trace elements in rye malt. The i…
Chemical Composition of Scots Pine Bark as a Bioindicator of Environmental Quality in Riga, Latvia / Priežu Mizu ķīmiskais Sastāvs Kā Vides Stāvokļa …
2015
Abstract The chemical composition of pine bark was used for the determination of environmental quality in Rīga. Bark samples were collected at 54 sites in Rīga differing in vegetation and building area characteristics (urban forests, parks and cemeteries, dwelling houses, and streets and railway zones) and at 52 sites from rural areas in Latvia (background level). Concentrations of Ca, Mg, Na, K, Fe, Mn, Zn, Ni, Cu, Cd, Pb, and pH was determined in the samples. The results showed significantly higher concentrations of chemical elements in pine bark collected in Rīga, compared to background levels: Fe and Cu concentrations three times higher, and other elements - up to 1.8 times. The highest…
Comparison of Body Composition and Energy Intake of Young Female Ballet Dancers and Ordinary School Girls
2017
Abstract The aim of this study is to assess body fat level, energy and nutrient intake of adolescent ballet dancers and to compare these results with those of adolescents from ordinary school. Participants included 39 ballet dancers and 70 adolescents from ordinary school. Body composition was measured using a multi-frequency 8-polar bioelectrical impedance leg-to-hand analyser (X-Scan Plus II, Korea). Dietary intakes were assessed using a three-day estimated food record. Nutritional intake was calculated using the Nutri Survey software. Ballet dancers were slightly shorter, lighter, with less fat and fat-free mass compared to girls from ordinary school. 51.3% (95% CI 35.59 to 66.97) of bal…
Thirty Years of Epidemiological Studies of Cardiovascular Disease Risk Factors in Latvia: Why are they Needed?
2020
Abstract The present review is designed to provide insight into population-based investigations of cardiovascular risk factors in Latvia. Most of them represent urban, rural and mixed populations. The results are age-standardised using the European Standard Population. All of the studies confirm a high prevalence of cardiovascular risk factors with wide differences across the studies. The differences are not consistent or regular and some of the underlying reasons are discussed. Analysis of the previous studies justifies the need for a nationwide cross-sectional epidemiological study, which in a small country can be carried out in compliance with all the requirements for a population-based …
Differences in Chromatic Sensitivity Estimated Using Static and Dynamic Colour Stimuli
2017
Abstract The current study reports on a novel computerised colour vision test employing static and dynamic stimuli. The aim of the study was to assess if static and dynamic stimuli result in comparable chromatic discrimination thresholds when participant’s age is taken into account. Participants (n = 20) were 21 to 77 years old, had normal colour vision and no history of any eye disease. They all participated in two sessions estimating chromatic sensitivity with static and dynamic stimuli, respectively, with six directions in colour space varying either along the red-green (RG) or yellow- blue (YB) directions. We found no significant differences in chromatic thresholds along a tritan axis o…
Visual Acuity and Contrast Sensitivity Depending from Keratoconus Apex Position
2017
Abstract Various studies have demonstrated that patients with keratoconus have significant loss of contrast sensitivity while its value varies in different studies. None of these studies has analysed reduced contrast sensitivity depending on the position of apex of corneal conus. Visual acuity and contrast sensitivity were evaluated for patients with keratoconus using the FrACT software. Contrast sensitivity was assessed at the following frequencies: 1, 3, 5, 7, 9, 11, 13, and 15 cycles per degree (cpd). Twenty-four eyes with keratoconus were analysed. Contrast sensitivity was significantly lower for patients with the apex at the centre compared with apex on the periphery both with (p = 0.0…
Anther Culture Effectiveness in Producing Doubled Haploids of Cereals/ Putekðòu Kultûras Efektivitâte Graudaugu Dubultoto Haploîdu Izveidoðanâ
2014
Abstract Our goal was to improve the method of obtaining double haploids (DH) by anther culture from Latvian breeding material for several agriculturally important cereals in Latvia: barley, spring and winter wheat. Hybrids from Latvian breeders were initial material. It was found that copper (2.5 mg/l) added to barley anther pre-treatment media and to both barley (C3) and wheat (liquid AMC) induction media, resulted in a higher percentage of green plants-regenerants. In general, the winter wheat hybrids exhibited lower embryogenesis than spring wheat hybrids. Obtaining a large number of DH lines from barley and wheat hybrids with unknown androgenesis response can be organized in two stages…
Sugar moiety has a direct influence on the secondary structure and properties of sturgeon gonadotropin
2009
Sugar moiety has a direct influence on the secondary structure and properties of sturgeon gonadotropin Sturgeon Acipenser güldenstädti Br. gonadotropic hormone (GTH) β-subunit (β-GTH) was selectively chemically deglycosylated (dg) by anhydrous hydrogen fluoride and trifluoromethane sulfonic acid. Two dgβ-GTH molecular forms retaining 35% (dgβ-GTH1) and 13% (dgβ-GTH2) of their initial carbohydrates were obtained. Investigation of the reassociated α-β hybrid dimers (recombinants) α-GTH+dgβ-GTH1 and α-GTH+dgβ-GTH2 showed that the immunoreactivity with antiserum raised against standard GTH dropped by 22.5%. Hybrid dimers were recognised by the standard GTH antibodies, which indicated that the s…
Single-Center Retrospective Series of Intracranial Aneurysms Treated with the Barricade Coil System: Immediate and Six-Month Results
2020
Abstract Intracranial aneurysms (IAs) are most commonly found at the branch points of large arteries that form the circle of Willis. The prevalence of IAs in the adult population is 1–5%. IAs rupture is associated with subarachnoid haemorrhage (SAH) in 6–8 cases per 100 000 population, causing mortality in 40–50%. Aneurysm treatment is used to prevent rupture or rebleeding (for ruptured IAs). Randomised trials demonstrated the superiority of endovascular treatment (EVT) of ruptured aneurysms with coil systems over surgery. The objective of the study was to evaluate the effectiveness of the Barricade coil system in the treatment of intracranial aneurysms. Detachable platinum coils, since the…