The fungus Candida albicans colonizes human oral cavity surfaces in conjunction with a complex microflora. C. albicans SC5314 formed biofilms on saliva-coated surfaces that in early stages of development consisted of approximately 30% hyphal forms. In mixed biofilms with the oral bacterium Streptococcus gordonii DL1, hyphal development by C. albicans was enhanced so that biofilms consisted of a...

Background & Aims: The purpose of this study was to evaluate the efficacy of oral selenium in alleviation of oral mucositis induced by radiotherapy in head and neck cancer patients. Methods: In a randomized double blind pilot study, 35 patients under radiotherapy, due to primary tumors localized in the head or neck, who had at least two oral sites were studied. They were randomly divided into t...

Candida albicans is a commensal yeast that is normally present in the oral cavity of the population. This opportunistic pathogen is frequently isolated from the human mouth but its presence in the oral cavity is not indicative of disease. Colonization of the oral cavity by Candida albicans involves the acquisition and maintenance of a stable yeast population. Micro-organisms are continually bei...

The dosimetry for radiocolloid therapy of cystic craniopharyngiomas is investigated. Analytical calculations based on the Loevinger and the Berger formulas for electrons and photons, respectively, are compared with Monte Carlo simulations. The role of the material of which the colloid introduced inside the craniopharyngioma is made of as well as that forming the cyst wall is analyzed. It is fou...

Artificial airway (AAW) and mechanical ventilation (MV) are indicated in the presence of imbalance between demand and ventilatory capacity. Upper airways have a very important role for the inspired air heating, humidification and filtration, and are responsible for about 65% of alveolar gas humidity.(1,2) Prolonged inhalation of inappropriately conditioned gases may lead to hypothermia, bronchi...

Oral schwannomas (OSs) are rare benign tumors of oral cavity derived from peripheral nerve sheath, composed of proliferation of schwann cells in a characteristic pattern. AS are long-standing lesions which exhibit degenerative changes and atypia due to which they could be mistaken for malignancy. The mean age of occurrence of AS in oral cavity is 43 years, and no case of oral AS has been report...

Three new species of free-living marine nematodes from intertidal sands in Xiamen, Fujian province are described and illustrated. Bathylaimus denticulatus sp. n. can be distinguished by a relatively small buccal cavity with its second part armed with two distinct teeth, short 2-3 μm labial and 12-16 μm cephalic setae and amphids of 0.8-0.9 turns. Oncholaimus minor sp. n. is characterized by its...

The theoretical description of exploitation competition, known as resource competition theory (RCT) or resource-ratio theory, has been tested in terrestrial plant communities and microorganisms in laboratory cultures. Applications in animal ecology have been rare, although the theory itself is generic. A major difficulty is that the description of resources in RCT is fundamentally different fro...