We propose a mathematical model of COVID-19 pandemic preserving an optimal balance between the adequate description by SIR and simplicity practical estimates. As base equations, we derive two-parameter nonlinear first-order ordinary differential equations with retarded time argument, applicable to any community (country, city, etc.).The presented examples modeling development depending on two p...

The articles appearing in this special section discuss the role that conscientiousness may play in healthy aging. Growing evidence suggests that conscientious individuals live longer and healthier lives. However, the question remains whether this personality trait can be leveraged to improve long-term health outcomes. We argue that even though it may be possible to design therapeutic interventi...

Children (n = 130; M(age) = 8.51-15.68 years) and college-aged adults (n = 72; M(age) = 20.50 years) completed numerosity discrimination and lexical decision tasks. Children produced longer response times (RTs) than adults. R. Ratcliff's (1978) diffusion model, which divides processing into components (e.g., quality of evidence, decision criteria settings, nondecision time), was fit to the accu...

aim : the aim of this study was to evaluate the likelihood ratio and frequency of dq2 and dq8 in iranian patients with celiac disease (cd). background : the hla dq2 and hla dq8 are the important mediators in the development of celiac disease. a few studies evaluated the frequency of hla dq2 and hla dq8 haplotypes among the iranian population with low sample size. patients and methods : in this ...

Typhoid fever is a multiorgan infectious disease caused by Salmonella typhi. It transmitted through fecal oral route and can be fatal without proper treatment. Therefore, early diagnosis of typhoid crucial. In the previous study, we have developed TYPHOIDYNE EIA, which showed excellent synergy between genus conserved species-specific antigens in serodiagnosis fever. EIA effectively detect diffe...

background: studies have demonstrated that sickle cell trait can be found in an asymptomatic healthy carrier with normal complete blood count (cbc) and red blood cell (rbc) indices. according to iranian ministry of health bulletin instructions, prenuptial thalassemia screening program (tsp) primarily depends on rbc indices which are measured through a routine cbc. only when these levels are bel...

objective(s): researchers have intended to reformulate drugs so that they may be more safely used in human body. polymer science and nanotechnology have great roles in this field. the aim of this paper is to introduce an efficient drug delivery vehicle which can perform both targeted and controlled antibiotic release using magnetic nanoparticles grafted ph-responsive polymer.  methods: fe3o4 na...

a study was carried out to determine whether naturally-occurring weeds and other cultivated plants in tomato growing regions could act as symptomless reservoirs of infection to fusarium oxysporum f. sp. lycopersici. a numher of f. oxysporum isolates from weeds and oubergines were used in this investigation. a susceptible tomato cultivar was used for comparison. the plants were artificially ...