Search results for "Kerma"
showing 6 items of 46 documents
Monte Carlo dosimetric study of Best Industries and Alpha Omega Ir-192 brachytherapy seeds
2004
Ir-192 seeds are widely used in the USA for low dose rate interstitial brachytherapy. There are two commercially available models: those manufactured by Best Industries filtered with stainless steel, and those manufactured by Alpha-Omega seeds filtered with Pt. Newly developed 3D correction algorithms for brachytherapy are based on dosimetry data obtained on unbounded phantom size, allowing corrections for heterogeneities and actual tissue boundaries. Published dosimetric datasets for both seeds have been obtained under bounded conditions. The aim of the present study is to obtain dosimetric datasets for these seeds under full scatter conditions. The Monte Carlo GEANT4 code has been used to…
Some considerations on Hydra groups and a new bound for the length of words
2013
The Synbiotic Combination of Akkermansia muciniphila and Quercetin Ameliorates Early Obesity and NAFLD through Gut Microbiota Reshaping and Bile Acid…
2021
Gut microbiota plays a key role in obesity and non-alcoholic fatty liver disease (NAFLD), so synbiotics could be a therapeutic alternative. We aim to evaluate a nutritional intervention together with the administration of the bacteria Akkermansia muciniphila and the antioxidant quercetin in an in vivo model of early obesity and NAFLD. 21-day-old rats were fed with control or high-fat diet for six weeks. Then, all animals received control diet supplemented with/without quercetin and/or A. muciniphila for three weeks. Gut microbiota, NAFLD-related parameters, circulating bile acids (BAs) and liver gene expression were analyzed. The colonization with A. muciniphila was associated with less bod…
Técnicas, modelos y transferencia en la ingeniería de puentes de la Cuba decimonónica. 1800-1860
2021
El fomento de las obras públicas como recurso de desarrollo económico y comercial tiene en la Cuba decimonónica uno de sus ejemplos nacionales más destacados. En este proceso, la implementación de la tecnología de la nueva era industrial introdujo en la isla nuevas referencias que tuvieron un impacto destacable en varios ámbitos constructivos. Este trabajo tiene como objetivo proyectar este análisis sobre la evolución de la ingeniería de puentes de los dos primeros tercios del siglo XIX. Mediante la documentación de varios proyectos, algunos inéditos, se identifican cuáles fueron sus modelos de referencia, sus vías de introducción y los canales de transferencia que tuvieron lugar a partir d…
Inulīna un auzu beta-glikānu ietekme uz probiotisko baktēriju Akkermansia muciniphila augšanu un metabolismu.
2021
Cilvēku zarnu mikroflora pārdzīvoja revolūcionāras izmaiņās sakarā ar globālo industrializāciju. Masveida uztura paradumu izmaiņas saistītas ar ātrās ēdināšanas paplašināšanos, cukurotu dzērienu popularizēšanu, plašu pesticīdu izmantošanu lauksaimniecībā, kā arī palielināta sabiedrības interese uz vienkāršiem ogļhidrātiem un piesātinātiem taukiem var veicināt zarnu mikrobiotas disbiozi, kas savukārt ir cieši saistīta ar metabolā sindroma attīstīšanos. Kombinēti dažādi cukura vielmaiņas traucējumi palielina risku saslimt ar 2. tipa cukura diabētu un sirds un asinsvadu slimībām. Ir pierādīts, ka nesen izolētās gramnegatīvās baktērijas Akkermansia muciniphila daudzums apgriezti korelē ar aptau…
The use of nomograms in LDR-HDR prostate brachytherapy
2011
Purpose: The common use of nomograms in Low Dose Rate (LDR) permanent prostate brachytherapy (BT) allows to estimate the number of seeds required for an implant. Independent dosimetry verification is recommended for each clinical dosimetry in BT. Also, nomograms can be useful for dose calculation quality assurance and they could be adapt ed to High Dose Rate (HDR). This work sets nomograms for LDR and HDR prostate-BT implants, which are applied to three different institutions that use different implant techniques. Material and methods: Patients treated throughout 2010 till April 2011 were considered for this study. This exam ple was chosen to be the representative of the latest implant tech…