3 research outputs found
New assessment technologies to evaluate current and intermediate knowledge of learners
Modern education development trends, and the emergence of
new modes of study put forward new requirements for testing. The
purpose of the research is to scientifically substantiate the application
of testing technologies aimed at increasing student motivation to
acquire economic competencies. In order to experimentally verify the
feasibility of testing technologies as a factor that increases the
motivation and success of learners of non-economic specialties, a
pedagogical experiment was conducted. It has been established that the
maximum effect is achieved through the integrated approach - the use
of testing technologies to assess both current and intermediate (final)
knowledge of learners.Las tendencias modernas de desarrollo educativo, y la aparici贸n
de nuevos modos de estudio plantean nuevos requisitos para las
pruebas. El prop贸sito de la investigaci贸n es fundamentar
cient铆ficamente la aplicaci贸n de tecnolog铆as de prueba destinadas an
aumentar la motivaci贸n de los estudiantes para adquirir competencias
econ贸micas. Con el fin de verificar experimentalmente la viabilidad de
las tecnolog铆as de prueba como un factor que aumenta la motivaci贸n y
el 茅xito de los estudiantes de especialidades no econ贸micas, se realiz贸
un experimento pedag贸gico. Se ha establecido que el efecto m谩ximo se
logra a trav茅s Del enfoque integrado: el uso de tecnolog铆as de prueba
para evaluar el conocimiento actual e intermedio (final) de los
alumnos
Immunogenicity and Safety of the Quadrivalent Adjuvant Subunit Influenza Vaccine in Seropositive and Seronegative Healthy People and Patients with Common Variable Immunodeficiency
Background. Influenza prophylaxis with the use of quadrivalent vaccines (QIV) is increasingly being introduced into healthcare practice. Methods. In total, 32 healthy adults and 6 patients with common variable immunodeficiency (CVID) received adjuvant QIV during 2018–2019 influenza season. Depending on initial antibody titers, healthy volunteers were divided into seronegative (≤1:20) and seropositive (≥1:40). To evaluate immunogenicity hemagglutination inhibition assay was used. Results. All participants completed the study without developing serious post-vaccination reactions. Analysis of antibody titer 3 weeks after immunization in healthy participants showed that seroprotection, seroconversion levels, GMR and GMT for strains A/H1N1, A/H3N2 and B/Colorado, B/Phuket among initially seronegative and seropositive participants meet the criterion of CHMP effectiveness. CVID patients showed increase in post-vaccination antibody titer without reaching conditionally protective antibody levels. Conclusion. Adjuvant QIV promotes formation of specific immunity to vaccine strains, regardless of antibodies’ presence or absence before. In CVID patients search of new regimens should be continued
Norvaline Reduces Blood Pressure and Induces Diuresis in Rats with Inherited Stress-Induced Arterial Hypertension
Growing evidence suggests that increased arginase activity affects vital bioprocesses in various systems and universally mediates the pathogenesis of numerous metabolic diseases. The adverse effects of arginase are associated with a severe decline in L-arginine bioavailability, which leads to nitric oxide synthase substrate insufficiency, uncoupling, and, eventually, superoxide anion generation and substantial reduction of nitric oxide (NO) synthesis. In cooperation, it contributes to chronic oxidative stress and endothelial dysfunction, which might lead to hypertension and atherosclerosis. Recent preclinical investigations point arginase as a promising therapeutic target in ameliorating metabolic and vascular dysfunctions. In the present study, adult rats with inherited stress-induced arterial hypertension (ISIAH) were used as a model of hypertension. Wistar rats served as normotensive controls. Experimental animals were intraperitoneally administered for seven days with nonproteinogenic amino acid L-norvaline (30鈥塵g/kg/day), which is a potent arginase inhibitor, or with the vehicle. Blood pressure (BP), body weight, and diuresis were monitored. The changes in blood and urine levels of creatinine, urea, and NO metabolites were analyzed. We observed a significant decline in BP and induced diuresis in ISIAH rats following the treatment. The same procedure did not affect the BP of control animals. Remarkably, the treatment had no influence upon glomerular filtration rate in two experimental groups, just like the daily excretion of creatinine and urea. Conversely, NO metabolite levels were amplified in normotonic but not in hypertensive rats following the treatment. The data indicate that L-norvaline is a potential antihypertensive agent and deserves to be clinically investigated. Moreover, we suggest that changes in blood and urine are causally related to the effect of L-norvaline upon BP regulation