Broad bean (Vicia faba L.) plants were exposed, in duplicate controlled environment chambers, to charcoal/Purafil-filtered air (CFA-grown plants) or to 75 nmol mol(-1) ozone (O(3)) for 7 h d(-1) (O(3)-grown plants) for 28 d, and then exposed to 150 nmol mol(-1) O(3 )for 8 h. The concentration of ascorbate (ASC) was determined in leaf extracellular washing fluid (apoplast) and in the residual le...

The aim of this study was to characterize the mechanism of the chemical interaction between L-ascorbic acid (ASC) and tetrahydrobiopterin (BH(4)) in vitro and to examine its effect on the activity of endothelial nitric oxide synthase (eNOS) in first trimester human placentae. At room temperature, in Tris-HCl buffer (pH 7.4), both ASC and BH(4) were readily oxidized by dissolved O(2) or H(2)O(2)...

We used cytohistologic correlation to determine the clinical significance of atypical squamous cells, cannot exclude high grade (ASC-H) in perimenopausal and postmenopausal women. A computer search identified 250 Papanicolaou smears from women older than 45 years with a diagnosis of ASC- H. Cases were considered perimenopausal (45 to < 55 years; 150 cases) and postmenopausal ((3)55 years; 100 c...

An evaluation of two commercially available swab transport systems, Port-A-Cul (PAC; BBL Microbiology Systems, Cockeysville, Md.) and Anaerobic Specimen Collector (ASC; Becton Dickinson Vacutainer Systems, Rutherford, N.J.), in the recovery of organisms from clinical specimens was done. Fifteen abscesses were drained, and swabs of their contents were placed in the transport systems until they w...

Adenosquamous carcinoma (ASC) of the head and neck (H and N) is an aggressive variant of squamous cell carcinoma (SCC). They are described as SCC subtype with high infiltrative capacity and also presents with dual histomorphology, having both squamous and glandular cell components. ASC of the H and N region is considered as a controversial tumor, as it is similar to salivary gland mucoepidermoi...

Background : We examined cervicovaginal smears that contained definite low-grade squamous intraepithelial lesion (LSIL) cells and rare atypical cells suggestive of high-grade SIL (HSIL) (ASC-H) or contained borderline dysplastic cells between LSIL and HSIL. Such lesions were classified as LSIL-H. This study aimed to investigate the cytologic and histologic characteristics of LSIL-H category and...