Bladder cancer is a heterogeneous disease and occupies highest incidence in developed country. There are over 70,000 new cases of bladder cancer each year in the United States alone. The incidence of bladder cancer rises with age, peakingbetween age 50 years and 70 years, and is three times more common in men than in women . The high rate of recurrence is the feature of bladder cancer that makes effective detection means is crucial importance for bladder cancer patients.
Due to the importance of hydrolysis reactions, lipase enzymes are the subject of exhaustive research for many medical applications, biological treatment processes, and pharmaceutical synthesis. Glycerols and fatty acids produced from oil degradation are significantly important and had been used in many applications. Although the use of enzymes such as lipase in fatty acids production and glycerols manufacturing is well-known, industrial applications which require high conversion (99%) are hindered by the application of high pressure, high temperature, and the very long reaction times. These severe operating conditions are expensive and in most cases produces dark fatty acids as a result of side polymerization and the formation of undesired by-products. Additionally, treatment and purification of final products by complex distillation methods complicates the process and add further energy concerns.
Increased productivity is one of the most important
objectives in continuous production of ethanol. It is generally accepted that a
high concentration of yeast favors an increased ethanol yield of the
fermentation process . Several techniques that promote the accumulation ofbiomass in fermenters have been used in continuous fermentation processes,
including cell immobilization in polymeric matrices and cell recycle by
centrifugation or filtration through membranes. Good performances have been
reported for processes using immobilized cells; however, procedures and
materials involved in this technique are inaccessible to a large number of
small industrial units . Centrifugation and filtration equipments are extremely
expensive and prone to mechanical problems; the use of these equipments is
limited due to high investment and maintenance costs. Since yeast separation by
conventional methods is an expensive operation in alcoholic fermentation
plants, alternative separation techniques using cheaper equipment such as
hydrocyclones and settlers have been investigated aiming to reduce the costs
involved in ethanol production.
Although solid particles can settle under the action of a
centrifugal force, gravitational sedimentation is understood as the settling of
particles within a fluid under the force of gravity. The factors that controlthe settling velocity are the solids concentration in the slurry, the densities
of solid and liquid, the size and shape of the particles and the viscosity of
the medium. However, the most important factors are the particle size and
particle density.
Early detection of oral premalignant lesions which might
evolve into oral cancer by screening methods using suitable markers is
critical. Saliva as a diagnostic fluid seems to be promising and has a number
of advantages when compared to the blood-based testing. Histopathologicaldiagnosis is still gold standard when diagnosing oral premalignant lesions,
however, studies upon the role of salivary cytokines show promising results
although more studies are needed on a larger sample. Cytokines have an
important role in oral diseases and increased levels of interleukin 6 (IL-6)
and tumor necrosis factor alpha (TNF-alpha) have been reported in patients with
cancer and premalignant lesions such as oral lichen planus and oral submucous
fibrosis. Brailo et al.reported significantly increased levels of salivary IL-6
and TNF-alpha in patients with oral leukoplakia when compared to healthy
controls.
Furthermore, the levels of salivary IL-6 and TNF-alpha did not
correlate with the size of leukoplakic lesions nor with its localization.
Recently, Brailo et al.reported that salivary IL-1β and IL-6 were significantly
higher in oral cancer patients than in patients with leukoplakia and control
group. No significant differences in salivary TNF-α between either of thegroups were seen. Sharma et al.reported increased salivary IL-6 levels in
patients with leukoplakia and coexisting periodontitis and in periodontitis
patients in comparison to the healthy controls. The same authors found that in
the leukoplakia group, increased salivary IL-6 level was noticed together with
increase in the severity of dysplasia. Sharma et al.concluded that the use of
tobacco had a significant role in the elevation of salivary IL-6 which is
contrary to the results of Brailo et al.
Woody plants of Tamaulipan Thornscrubs in the semiarid
regions are of great economic importance for various uses such as timber for
furniture, fences, firewood and serve as sources of forage for wild animal
grazing. Few studies are undertaken on nutrient contents of woody plants. The
specific leaf area (SLA, leaf area per unit mass) appears to be correlated with
leaf nitrogen per unit dry mass, photosyntheis and dark respiration sites.
