Objectives: Studies have shown that most children before the age of 5 are capable to comprehend and express wh-questions in daily conversations. This study aimed at comparing the ability of wh-questions’ production in 4- to 6-year-old children in spontaneous and elicited conditions. Methods: In this descriptive-analytic study, 4- to 6-year-old Persian-speaking children (N = 72) were selected r...

background: the aim of the study was to compare the effects of 'face-to-face education' and 'educational movies' on  'knowledge' and 'practice' of women of child-bearing-age, in terms of health-care during pregnancy and during infancy in a suburban region near tehran city, iran.   methods: in this quasi-experimental study, the sample included 873 married women. questionnaires for knowledge and ...

background: to determine plasma concentrations of bone resorption marker cross-linked n-terminal telopeptide (ntx) of type i collagen in periodontal health, disease and after nonsurgical periodontal therapy in chronic periodontitis group.in addition, to know the association between plasma ntx levels and the different clinical parameters. materials and methods: thirty subjects were divided on th...

Mahalanobis’ D-square (D2) statistics was applied to assess diversity in the 9 genotypes collectedof semi-arid region of India (7 genotypes from Gujarat and Rajasthan for normal toxic and two fromOrissa csmcri’s plantation of non toxic nature. These genotypes were grouped into five. Cluster I andIII had two genotypes, cluster II had three genotypes and cluster VI and V contributed as solitaryge...

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background and aims: the indiscriminate use of antibiotics can lead to antibiotic resistance in the treatment of infections caused by bacteria such as pseudomonas aeruginosa. the presence of integrons in pseudomonas is clearly associated with multidrug resistances. therefore, this study aimed at tracking class i, ii and iii integrons of antibiotic-resistant isolates of pseudomonas aeruginosa th...

Approximately all sequenced archaeal and half of eubacterial genomes have some sort of adaptive immune system, which enables them to target and cleave invading foreign genetic elements by an RNAi-like pathway. CRISPR–Cas (clustered regularly interspaced short palindromic repeats–CRISPR-associated proteins) systems consist of the CRISPR loci with multiple copies of a short repeat sequence separa...