Search results for "bolus"
showing 10 items of 125 documents
SU-FF-T-62: Dosimetric Evaluation of An Internal Shielding Used with a HDR Skin Applicator
2009
Purpose: The Valencia HDR skin applicators are accessories of the microSelectron HDR afterloading system (Nucletron) cup shaped to limit the dose to the irradiation area. Applicators sizes are: diameter 2 and 3 cm. The typical prescription depth is 3 mm. This work aims to evaluate the backscatter and electron contamination of an internal shielding used to reduce the dose to the ocular globe when the lesion is located at the eyelid. Monte Carlo(MC) and experimental methods have been used. Method and Materials: The geometry has been: the Valencia applicator (2 cm diameter) on the surface of a solid polystyrene slab phantom; inside, a 2 mm lead slab located at 3 mm depth. MC simulation charact…
Intrapulmonary 3He Gas Distribution Depending on Bolus Size and Temporal Bolus Placement
2008
OBJECTIVE: Dynamic ventilation (3)He-MRI is a new method to assess pulmonary gas inflow. As differing airway diameters throughout the ventilatory cycle can influence gas inflow this study intends to investigate the influence of volume and timing of a He gas bolus with respect to the beginning of the tidal volume on inspiratory gas distribution. MATERIALS AND METHODS: An ultrafast 2-dimensional spoiled gradient echo sequence (temporal resolution 100 milliseconds) was used for dynamic ventilation (3)He-MRI of 11 anesthetized and mechanically ventilated pigs. The applied (3)He gas bolus was varied in volume between 100 and 200 mL. A 150-mL bolus was varied in its application time after the beg…
Main individual and product characteristics influencing in-mouth flavour release during eating masticated food products with different textures: mech…
2013
Research Areas: Life Sciences & Biomedicine - Other Topics; Mathematical & Computational Biology; A mechanistic model predicting flavour release during oral processing of masticated foods was developed. The description of main physiological steps (product mastication and swallowing) and physical mechanisms (mass transfer, product breakdown and dissolution) occurring while eating allowed satisfactory simulation of in vivo release profiles of ethyl propanoate and 2-nonanone, measured by Atmospheric Pressure Chemical Ionization Mass Spectrometry on ten representative subjects during the consumption of four cheeses with different textures. Model sensitivity analysis showed that the main paramet…
An Analysis of “No Effect of Insulin Pen with Memory Function on Glycemic Control in a Patient Cohort with Poorly Controlled Type 1 Diabetes: A Rando…
2012
Missing meal bolus and nonadherence is an important barrier to achieving glycemic goals in type 1 diabetes (T1DM). In this issue of Journal of Diabetes Science and Technology, Danne and coauthors reported the results of a 24-week randomized-controlled study designed to evaluate if using an insulin pen with memory function, the HumaPen® Memoir™, might improve injection compliance and, therefore, overall glycemic control in T1DM. Patients treated with the pen device with memory function improved, albeit nonsignificantly, their mean HbA1c by 0.43%. Among the reasons to justify why this study was not positive, the most important is the high proportion of adult patients included in the study (87…
Viscosity of artificial bolus of high protein extruded snacks
2018
Pulse legumes (pea, lentil, faba bean) are excellent source of proteins (20-30% db), dietary fibers (10-30%), and starch (40-55%). The formulation of gluten-free extruded snacks made entirely from pulse legumes is an interesting way to introduce legumes to young people. Due to the reactivity of protein components under thermomechanical treatment, extrusion can produce cellular structures with various texture and starch-protein composite morphology. In turn, the morphology of parietal material governs masticatory performances. For the first time, the interaction coefficient between bolus and saliva was determined by taking into account multi-scale structure of high-protein solid foams. The p…
L25 Influence of mastication and salivation on salt release during bread consumption and relationships with food bolus formation
2012
National audience
Does oral health people imparirments modify bolus formation, bolus characteristics and food comfortability of meat products?
2018
International audience; Ageing is often accompanied by oral impairments like tooth loss or decrease saliva flow that play a key role in eating behavior. In the context of aging population, the aim of this study is 1- to understand the influence of dental status and salivary flow on the meat bolus formation and characteristics in function of meat structure, 2- to investigate the link between the food bolus properties and the food comfortability (as defined by (Vandenbergue-Descamps et al., 2017)) during meat consumption. This was achieved by asking elderly people (n=65) with good oral health (17H, 16F, age=73±6, UFP n=8±1) or poor oral health (15H, 17F, age=75±6, UFP n=3±1) to consume 4 meat…
In-mouth aroma compound release during cheese consumption: Relationship with food bolus formation
2011
International audience; The present study describes the changes in mechanical properties and saliva incorporation for cheese samples with different composition and texture, and their influence on the rate of aroma release. Chewing work per cycle, salivary flow rate and chewing rate varied highly among subjects. Despite the differences in cheese hardness, at the end of mastication, bolus texture was the same for cheeses with the same lipid content. Low-fat cheeses gave harder bolus than high fat ones, despite being chewed longer, with higher work per cycle and more moisture. Salivary flow rate did not vary among cheese samples but, at the end of mastication, the amount of saliva in boluses d…
Myxosporea parasites in roach, Rutilus rutilus (Linnaeus), from four lakes in central Finland
1991
Ten myxosporean species belonging to three families were found in roach, Rutilus rutilus (Linnaeus), obtained in 1985 and 1986 from four lakes in central Finland which are connected to each other, but differ in water quality. One of the lakes is polluted by paper and pulp mill effluent, two are eutrophic and one is oligotrophic and still in its natural state. Eight species were found in all the lakes. The most common species were Myxidium rhodei Leger, 1905, Myxobolus muelleri Butschli, 1882 and Myxobolus pseudodispar Gorbunova, 1936 with prevalences varying between 66–80, 16–31 and 32–59%, respectively, in the four lakes. The largest difference in myxosporean prevalence between lakes was f…
Sparassidae from Japan. II. First Pseudopoda species and new Sinopoda species (Araneae: Sparassidae: Heteropodinae)
2002
The genus Pseudopoda is recorded for the first time from Japan. Pseudopoda kasariana sp. nov. (_??_, _??_) and Pseudopoda spirembolus sp. nov. (_??_, _??_) are described from Amami-oshima Island and Okinawajima Island respectively. Four new Sinopoda species are described: Sinopoda albofasciata (_??_), Sinopoda derivata (_??_, _??_), Sinopoda ogatai (_??_, _??_) and Sinopoda stellatops (_??_, _??_). Sinopoda koreana (Paik 1968) is recorded for the first time from Japan. New records of Sinopoda okinawana Jager & Ono 2000 and S. tanikawai Jager & Ono 2000 are presented. Within the genus Sinopoda Jager 1999 the okinawana species-group is newly diagnosed, which is represented by S. albofasciata …