J. J. Bernal

Solid Test Meal to Measure the Gastric Emptying with Magnetogastrography

The gastric emptying is the time of evacuating the food ingested from the stomach to the duodenum in a controlled rate. Diverse studies express the results of the gastric emptying in form of half‐time (t1/2). The Magnetogastrography (MGG) is a biomagnetic technique that has the advantage of not being invasive, radiation free and does not interfere with the privacy of the subject. The objective was to analyze the magnetic signal of magnetic tracers mixed in a solid food to measure gastric emptying using Magnetogastrography. The ingested test meal displayed a magnetic signal, which served to obtain the signal registered by the fluxgate and the peristaltic contractions could be calculated while the stomach was emptying. The solid food product developed results to work satisfactorily in magnetogastrography.

Evaluation of Serum Ferritin in Hemodialysis Patients by Raman Spectroscopy: Preliminary results

Patient undergoing hemodialysis are affected by variations in iron levels. This study focuses on characterizing blood iron levels by serum ferritin using Raman spectroscopy. The aim is to determine differences in spectra between groups with distinct ferritin levels estimate iron by serum ferritin.

Cell Behavior Undergoing Random Segments of Oscillating Magnetic Field

This Entamoeba cells, the amoebic dysentery is highly motile, but this motility is an essential feature of the pathogenesis and morbidity of amoebiasis. A description of the motility in cell grown of the Entamoeba Invandens is present- ed. These cells were undergone to random segments in several frequencies of magnetic field; pictures of this cell grown were recorded and processed in order to have a correlation of the applied frequencies with natural movements. The natural cell behavior was observed, this is, controlled agglutination, cell movement velocity, and membrane structural form. A correlation between applied frequencies and cells movement is discussed.

Propulsion Velocity and ETT on Biomagnetic Assessment of the Human Esophagus

Esophagus transit time measurement is a common clinical practical. Biomagnetic techniques and modern instrumentation can perform non invasive and functional assessments of the gastrointestinal tract. This study presents the evaluation of the esophagus transit time and propulsion velocity of a magnetic marker from the mouth to stomach using water vs. a swallow easy substance recently patented. A group of ten healthy subjects from 45 to 55 years, were evaluated in identical conditions for two times, they ingested randomly a magnetic marker in an anatomical body position of 45°, one times with water and the other one with a patented substance developed in order to help the subjects to swallow pills. The esophagus transit time was shorter when the subjects ingested the magnetic marker with the swallow easy substance than they ingested the magnetic marker with same quantity of water

Impedance Spectroscopy of Human Blood

The blood is one of the corporal fluids more used with analytical purposes. When the blood is extracted, immediately it is affected by agents that act on it, producing transformations in its elements. Among the effects of these transformations the hemolysis phenomenon stands out, which consists of the membrane rupture and possible death of the red blood cells. The main purpose of this investigation was the quantification of this phenomenon. A Solartron SI‐1260 Impedance Spectrometer was used, which covers a frequency range of work from 1 μHz to 10 MHz, and its accuracy has been tested in the accomplishment of several applications. Measurements were performed on 3 mL human blood samples, from healthy donors. Reactive strips for sugar test of 2 μL, from Bayer, were used as electrodes, which allow gathering a portion of the sample, to be analyzed by the spectrometer. Preliminary results of these measurements are presented.