The aim of this study was to manufacture and test, in vitro, a novel modification to provide fluoride-releasing orthodontic brackets. Thirty-two orthodontic brackets were drilled to produce a recess (approximately 1.3 mm in diameter and 0.7 mm in depth) at the centre of the bracket base. Four materials, with and without the addition of sodium fluoride, a glass ionomer cement (Ketac Cem micro), ...

Polyvinylidene Flouride (PVDF) is a film-type polymer that has been used as sensors and actuators in various applications due to its mechanical toughness, flexibility, and low density. A PVDF sensor typically covers an area of the host structure over which mechanical stress/strain is averaged and converted to electrical energy. This study investigates the fundamental "stress-averaging" mechanis...

This study represents the application of Water Quality Indices (WQI) and GIS techniques to grading water pollution factors that influenced groundwater quality Holocene (qh) Pleistocene (qp) aquifers in coastal zone Ninh Thuan province. 100 underground samples were collected from residential well qh aquifer (53 samples) qp (47 samples). indices using incorporated total dissolved solids (TDS), ch...

We previously suggested that after synthesis, proparathormone is transferred from rough endoplasmic reticulum to the Golgi region where its conversion to parathormone occurs. We have attempted to define more closely this transfer process. In the first type of study, bovine parathyroid slices were incubated with [3H]leucine for 10 min and then radioisotope labeling was restricted by addition of ...

There are presently no accurate methods of imaging prostate cancer metastases to bone. An unprecedented number of novel imaging agents, based on the biology of the disease, are now available for testing. We reviewed contemporary molecular imaging modalities that have been tested in humans with metastatic prostate cancer, with consideration of the studies' adherence to current prostate cancer cl...

The aim of this study is to compare the effect of herbal based and fluoride based tooth pastes on Streptococcus mutans. The effect of the toothpastes are compared and hence an idea on how to prevent, control and treat the dental caries is formulated. Streptococcus mutans is a bacterium commonly found in the human oral cavity and is a significant contributor to tooth decay. The bacterial count i...

INTRINSIC STAINING OF TEETH, apart from being caused by localised injury or infection, may be due to one of a number of factors. For example, the white patchy hypoplasia sometimes seen on the tips of the permanent incisors may have been due to a debilitating illness, such as broncho-pneumonia, in infancy. Pink staining of the teeth may occur in porphyria and in icterus gravis neonatorum the tee...

This paper examines numerically the use of arrayed shaped polyvinylidene fluoride film sensors to obtain an estimate of the far-field radiated power from a clamped-clamped Bernoulli–Euler beam excited by a sinusoidal point force. Distributed sensors are designed that are sensitive to the radiated power. Fourier analysis of point and distributed sensor outputs is used to estimate the beam’s radi...

Activated carbon can generally be made from carbon-containing materials such as coal. The activation in activated synthesis has different mechanisms and characteristics. objective of this study was to analyze the quality characterization bituminous coal using a fluoride (HF) activator. research method carried out starting sample preparation stage, chemical physical carbonization stage testing c...

Fluoride is naturally present in the earth's crust and can be found in rocks, coal, and clay; thus, it can be found in small quantities in water, air, plants, and animals. Therefore, humans are exposed to fluoride through food, drinking water, and in the air they breathe. Flouride is essential to maintain bone strength and to protect against dental decay, but if it is absorbed too frequently, i...