Use of standardized procedures to evaluate metal leaching from waste foundry sands.

As part of the casting process, foundries create sand molds and cores to hold the molten metal to specific dimensional tolerances. Although most of the waste foundry sands (WFSs) from this process are land filled, there is great interest in diverting them for use in agricultural and geotechnical applications. One potential limitation to their beneficial use is concern that the WFSs will leach high levels of trace metals.

Analysis of total metals in waste molding and core sands from ferrous and non-ferrous foundries.

Waste molding and core sands from the foundry industry are successfully being used around the world in geotechnical and soil-related applications. Although waste foundry sands (WFSs) are generally not hazardous in nature, relevant data is currently not available in Argentina. This study aimed to quantify metals in waste molding and core sands from foundries using a variety of metal-binder combinations.

Prognostic impact of p53, c-erbB-2 and epidermal growth factor receptor on head and neck carcinoma.

Context: p53, c-erbB-2 and epidermal growth factor receptor (EGFR) are cancer-related proteins that are usually expressed in head and neck squamous cell carcinoma (SCC). Their prognostic value remains controversial.

Objective: To evaluate the prognostic impact of p53, c-erbB-2 and EGFR expression in head and neck SCC.

Laryngeal sensitivity evaluation and dysphagia: Hospital Sírio-Libanês experience.

Context: Laryngeal sensitivity is important in the coordination of swallowing coordination and avoidance of aspiration.

Objective: To briefly review the physiology of swallowing and report on our experience with laryngeal sensitivity evaluation among patients presenting dysphagia.

Type Of Study: Prospective.

Clinical significance of c-myc and p53 expression in head and neck squamous cell carcinomas.

c-myc and p53 genes were frequently deregulated in head and neck squamous cell carcinoma (HNSCC). To determine if the concomitant expression of the two oncogenes might have prognostic value, the survival and free disease time of 140 consecutive HNSCC patients followed up for a median time of 29.9 months was analyzed in the light of p53 and c-myc expression assessed by immunohistochemistry.

Transforming growth factor beta1 (TGFbeta1) expression in head and neck squamous cell carcinoma patients as related to prognosis.

Background: Transforming growth factor beta1 (TGFbeta1) is a negative growth regulator in keratinocytes, and in vitro studies lead to the concept that loss of TGFbeta1 responsiveness is a critical step in epithelial carcinogenesis.

Objective: To investigate the prognostic relevance of TGFbeta1 expression in head and neck squamous cell carcinoma (HNSCC).

Materials And Methods: TGFbeta1 distribution was determined by immunohistochemistry in oral cavity/oropharynx (n = 79), larynx (n = 36) and hypopharynx (n = 25) tumors and in matched normal adjacent mucosa.