Properties of both chemical contaminants and polymers can impact contaminant diffusivity and solubility in new and aged polyethylene materials for pipes and geomembranes. Diffusivity, solubility, polymer and chemical properties were measured for thirteen contaminants and six polyethylene materials that were new and/or aged in chlorinated water. Tree regression was used to select variables, and ...

Simple and easy methods to evaluate swallowing are required because of the recently increased need of rehabilitation for dysphagia. "Artificial food bolus", but not "artificial food", would be a valuable tool for swallowing evaluation without considering the mastication effect which is altered according to the individual's oral condition. Thus, this study was carried out to fabricate artificial...

OBJECTIVES To determine the efficacy of a new saliva substitute in spray form, for patients with dry mouth. STUDY DESIGN Thirty-seven patients with dry mouth were selected (16 males and 21 females), with an age of over 60 years and meeting the following inclusion criteria: xerostomia and hyposialia confirmed by sialometry (resting whole saliva / stimulated whole saliva). A new artificial sali...

OBJECTIVE Most published results about the characteristics of NiTi wires are based on the mechanical laboratory tests on the as-received wires.The purpose of this study was to investigate the effect of saliva on load-deflection characteristics of superelastic NiTi wires. MATERIALS AND METHODS In this experimental study, 15 wires of three kinds of superelastic NiTi wires (Sentalloy, Force I an...

Streptococcus mutans is present in the saliva of most individuals and is modified by salivary components bound to the cells. These saliva-bound S. mutans are swallowed, exposed to high levels of acidity in the stomach, and presented to the common mucosal immune system. Much effort has been directed to identifying the specific S. mutans antigens that the mucosal immune responses are directed aga...

The present paper describes the results of tests on the influence of human saliva and its substitutes on tribological characteristics of implant materials on the example of the Ti-6Al-4V (a-Ti) titanium alloy. The saliva substitutes were prepared on the basis of pyrophosphates and mucins dissolved in saline buffer. The results of the presented tribological tests show that the values of the para...

fusarium head blight (fhb) caused by fusarium graminearum is responsible for billions of dollars in agriculture losses. the goal of the present study was evaluation the expression of acidic chitinase, one of pr proteins, in wheat defense response against different fhb induced treatments in 'falat' as a highly susceptible and 'sumai3' as a tolerant cultivar. these treatments contained fungi extr...

Porphyromonas gingivalis, a putative periodontopathogen, can bind to human saliva through its fimbriae. We previously found that salivary components from the submandibular and sublingual glands bind to P. gingivalis fimbriae and that acidic proline-rich protein (PRP) and statherin function as receptor molecules for fimbriae. In this study, we investigated the fimbria-binding components in parot...

Parotid saliva is a particularly good system to study exocrine secretory processes in man. Various proteins from human parotid saliva that have been previously isolated and partially characterized include glycoproteins, acidic proteins that contain little or no carbohydrate, and smaller acidic peptides rich in histidine or tyrosine (Henkin et al.. 1978). The secretory process in the parotid gla...