let $alpha$ be an endomorphism and $delta$ an $alpha$-derivationof a ring $r$.  in this paper we  study the relationship between an$r$-module $m_r$ and the  general polynomial module  $m[x]$ over theskew polynomial ring $r[x;alpha,delta]$. we introduce the notionsof skew-armendariz modules and skew quasi-armendariz modules whichare generalizations of $alpha$-armendariz modules and extend thecla...

In this paper a new class of sets called  regular generalized  $delta$-closed set (briefly rg$delta$-closed set)is introduced and its properties are studied. Several examples are provided to illustrate the behaviour of these new class of sets.

background: hepatitis delta virus (hdv) is a subviral human pathogen that exploits host rna editing activity to produce two essential forms of the sole viral protein, hepatitis delta antigen (hdag). editing at the amber/w site of hdv antigenomic rna leads to the production of the large form (l-hdag), which is required for rna packaging. methods: in this study, pcr-based site-directed mutagenesi...

background: hb a2 is elevated in subjects with beta thalassemia minor but small percent of carriers have normal hb a2 with elevated levels of hbf (2-10%). this type of thalassemia is called delta beta thalassemia, and can be missed in pre-marriage hematologic consults or screening which leads to increased risk of child birth with beta thalassemia major. materials and methods: in this prospectiv...

results the mean age of chb patients was 38.5± 11.9 years and 55.9% of them (231 patients) were male. there were 13 cases (3.1%) with hdv infection. there was no association between positive anti-hdv serology and factors such as age, gender, carrier state, liver enzymes, and positive hepatitis b e antigen (hbeag) serology. conclusions although hdv had a low prevalence in our area, it is importa...

patients and methods 720 cases including 120 patients undergoing hemodialysis, and 600 patients with hiv infection were studied. all cases with positive results for hbsag were evaluated for the presence of anti-hdv antibodies. samples with anti-hdv positive results were subjected to nested pcr for hdv-rna confirmation, and sequenced for hdv genotype determination. results hbsag was found in 9 (...

the leopard moth, zeuzera pyrina (l.) (lepidoptera: cossidae) is a serious pest of walnut and apple trees in iran. one of the control methods for this pest is the mass trapping of males using pheromone traps. to determine the best size and color of traps, four different colors (green, yellow, white, gray) and two different sizes (delta shape with standard adhesive surface, 19 × 22 cm and trapez...