Search results for "Latvia."
showing 10 items of 1313 documents
Pharmacological research on natural substances in Latvia: Focus on lunasin, betulin, polyprenol and phlorizin
2016
In this concise review the current research in plant bioactive compound studies in Latvia is described. The paper summarizes recent studies on substances from edible plants (e.g., cereals and apples) or their synthetic analogues, such as peptide lunasin, as well as substances isolated from inedible plants (e.g., birch and conifer), such as pentacyclic triterpenes (e.g., betulin, betulinic acid, and lupeol) and polyprenols. Latvian researchers have been first to demonstrate the presence of lunasin in triticale and oats. Additionally, the impact of genotype on the levels of lunasin in cereals was shown. Pharmacological studies have revealed effects of lunasin and synthetic triterpenes on the …
A 5,000-year-old hunter-gatherer already plagued by Yersinia pestis.
2021
Summary A 5,000-year-old Yersinia pestis genome (RV 2039) is reconstructed from a hunter-fisher-gatherer (5300–5050 cal BP) buried at Riņņukalns, Latvia. RV 2039 is the first in a series of ancient strains that evolved shortly after the split of Y. pestis from its antecessor Y. pseudotuberculosis ∼7,000 years ago. The genomic and phylogenetic characteristics of RV 2039 are consistent with the hypothesis that this very early Y. pestis form was most likely less transmissible and maybe even less virulent than later strains. Our data do not support the scenario of a prehistoric pneumonic plague pandemic, as suggested previously for the Neolithic decline. The geographical and temporal distributi…
CHANGING THE NATIONAL HEIGHT SYSTEM AND GEOID MODEL IN LATVIA
2016
According to the decision of IAG Reference Frame Sub-commission for Europe (EUREF) the EVRF2007 solution as the vertical reference has to be deployed in EU countries.The new height system LAS-2000,5 had been enacted as the European Vertical Reference System‘s EVRF2007 realization in Latvia and the new geoid model LV‘14 had been introduced by Latvian authority Latvian Geospatial Information Agency. However, the appreciation of the quality of quasi-geoid model LV‘14 is rather contradictious among the users in Latvia. The independent estimate and comparison of the two Latvian geoid models developed till now has been performed by the Institute of Geodesy and Geoinformatics. Previous geoid model…
The Neolithic Transition in the Baltic Was Not Driven by Admixture with Early European Farmers
2017
Summary The Neolithic transition was a dynamic time in European prehistory of cultural, social, and technological change. Although this period has been well explored in central Europe using ancient nuclear DNA [1, 2], its genetic impact on northern and eastern parts of this continent has not been as extensively studied. To broaden our understanding of the Neolithic transition across Europe, we analyzed eight ancient genomes: six samples (four to ∼1- to 4-fold coverage) from a 3,500 year temporal transect (∼8,300–4,800 calibrated years before present) through the Baltic region dating from the Mesolithic to the Late Neolithic and two samples spanning the Mesolithic-Neolithic boundary from the…
Double validation of translated questionnaires in international studies
2018
Background Study questionnaires developed in one country can be translated and used for similar studies in other countries. The main problem of this process is that people speaking different languages can understand the meaning of some questions differently due to disparate mentalities and backgrounds. To avoid a misunderstanding, to perform correct conclusions in accordance to the mentality of each country, and to permit the comparison of results in different countries, the intellectual validation of questionnaires is widely used. The main problem of such a validation is its qualitative nature that can be biased by the subjective approach of the investigator. Therefore, there is a necessit…
INTEREST OF LATVIAN AND LITHUANIAN STUDENTS IN SCIENCE AND MATHEMATICS
2018
Interest is one of the most important components for a successful teaching/learning process; unfortunately, nowadays students’ interest in science and mathematics is decreasing. The aim of the research is to explore the cognitive interest of 15-year- old students in science and mathematics. Students in Latvia and Lithuania participated in the survey; the data show that students’ cognitive interest in this area in both countries is mediocre. The factor analysis was used to single out four main dimensions of the cognitive interest – interest in the context, interest in mathematics, inquiry interest and enthusiasm. Students’ interest is higher in issues connected with practical life, the solut…
Return Migration Process in Policy and Practice
2019
AbstractThis chapter focuses on return migration processes in Latvia, integrating analysis of return migration policy and the experiences of return migrants. The analysis considers the extent to which return policy activities correspond to the needs and expectations of the target group, and addresses the role of this policy in the process of making the decision to return. The data used for the analysis are policy planning documents, The Emigrant Communities of Latvia survey and in-depth interviews. The main empirical evidence of the return experiences of migrants in the chapter comes from 18 in-depth interviews with Latvian returnees from various age and social status groups, who left Latvi…
Material Deprivation: a Case of Latvia
2021
Material deprivation has recently gained prominence as a topic of debate as its proliferation is raising throughout Europe in particular in the countries hit hardest by financial and economic turbulences what leads to the gap in material deprivation levels throughout Europe. The aim of the study is to analyze material deprivation in the regions of Latvia. Research methods used in preparation of the paper: scientific publication and previous conducted research results analysis, analysis of anonimised data of EU-SILC survey results and European Central Bank conducted survey on Household income and expenses survey results, results are compared with the results of other EU countries. Survey ano…
Impacts of Educational Technologies on Learning Engagement – A Case of Latvian and Thai's Learners
2019
Massive open online courses (MOOCs) have changed the traditional approach to the teaching process in higher education, so it is important to observe how learning takes place in that technology-rich environment. Cognitive, social, and emotional engagement as part of the MOOCs learning context is a basic principle that prescribes the relationships and interactions between the teacher, student, and learning setting. Each of these components has multiple features and is related to the complex nature of learning and teaching. The qualitative exploratory research design as a case study was conducted with educators and students from two countries – Latvia and Thailand. They were involved in learni…
Evaluating the Interrelationship between Actions of Latvian Commercial Banks and Latvian Economic Growth
2017
Abstract This paper aims to evaluate the existence of the interrelationship between Latvian commercial banks’ operations on the economy, based on economic theory and the analysis of banks’ retained earnings, credit growth and economic growth trends. The existence of this interrelationship was tested using Granger causality and Johansen co integration tests. The analysis was based on quarterly data from 2001 to 2015. The study reviewed several indicators for banking developments to establish their relevance for GDP growth: credit to non-banks, non-bank deposits and bank retained earnings. This paper finds that the empirical link between bank retained earnings and GDP growth is more robust th…