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Homogenization of powder blends using a high-speed mixer
Perďochová, Kristína ; Šklubalová, Zdeňka (advisor) ; Mužíková, Jitka (referee)
Charles University, Faculty of Pharmacy in Hradci Králové Department of: Department of Pharmaceutical Technology Supervisor: doc. PharmDr. Zdeňka Šklubalová, Ph.D. Consultant: PharmDr. Karel Palát, CSc. Student: Kristína Perďochová Title of Thesis: Homogenization of powder blends using a high-speed mixer This work focuses on using a high-speed mixer for the powder mixing process in pharmaceutical technology. Shortened experimental plan was used to study the influence of three factors (mixing speed, mixing time and weight of the mixture) in order to achieve the overall homogenity of the mixture containing acetylsalicylic acid and microcrystalline cellulose. Individual samples were compressed into tablets. The homogenity of the mixture was evaluated using near infrared spectroscopy (NIR). The standard devations of the measured spectra were observed. The best results obtained from studied mixtures were achieved by a combination of mixing 150 g of mixture, rotational speed of 900 rpm and mixing time of 30 seconds.
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The content of basic analytical constituents in selected raw meat
URBAN, Martin
This work is focused on the pork meat analysis. The moisture, fat, protein, collagen parts content in pork ham, shoulder and loin were measured with the NIR-method using. The samples from Masokombinát Plzen presented a high moisture content in comparison with the lower fat content. In the opposite the samples from Slaughterhouse contains a higher level of fat and less water. The pork ham purchased from the Slaughterhouse Lisov comprised 66.20 %, respectively 71.65 %, respectively 72.99 % moisture. Pork ham from the manufacturer Masokombinát Plzen contained 74.28 %, respectively, 75.18 %, respectively, 73.84 % moisture. The fat content of pork ham from manufacturer Slaughterhouse Lisov was measured 12.27 %, respectively, 4.55 %, respectively. 3.96 %. Pork ham from the manufacturer Masokombinát Plzen contained 1.76 %, respectively, 2.06 %, respectively, 3.01 % fat. The highest humidity of 75.29 % was measured at the pork shoulder by Masokombinát Plzen. At least moisture contained pork ham purchased from the manufacturer Slaughterhouse Lisov (66.2 %). Analysis revealed a high fat content of 12.03 % by the pork shoulders manufacturer Slaughterhouse Lisov. At least 1.76 % fat contained pork ham producer Masokombinát Plzen. Content of protein was the highest in pork ham by Slaughterhouse Lisov 24.13 %. Content of only 18.34 % of the protein was measured at the pork shoulder by Libor Novak. Most parts of the collagen contained pork loin from Slaughterhouse Lisov 1.78 %. Content of 0.4 % collagen parts were the lowest measured value. The highest moisture content (75.29 %) was measured at the pork shoulder producer Masokombinát Plzen, at least contained a pork ham from Slaughterhouse Lisov (66.2 %), the highest fat content (12.03 %) was observed in the pork shoulder from the manufacturer Slaughterhouse Lisov, the least fat (1.76 %) contained pork ham from Masokombinát Plzen. The richest content of proteins was in pork ham producer Slaughterhouse Lisov (24.13 %), only 18.34 % of the protein was measured at the pork shoulder of the company Libor Novak. The most of the collagen contained in sample from pork loin from Slaughterhouse Lisov (1.78 %) and the lowest in pork leg (0.32 %) from the manufacturer Masokombinát Plzen.
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Hodnocení barvy medu
Černá, Eva
The aim of the thesis on "Evaluation of the color of honey" was to determine why the instrument can not Lovibond Honey Colorpod 440110 to evaluate color of all types of honey and compare results of with spectrophotometric measurement methods. The work is divided into theoretical and practical part. The theoretical part is dedicated to honey, its composition and methods of evaluating color. The practical part describes the results obtained instrument Lovibond Honey Colorpod -- 440110, spectrophotometers Konica Minolta -- 3500d a FT -- NIR Antaris. In UV/VIS region not been demonstrated reason of errors of photometer. Maximum lightness had a very light honeys and the largest share of yellow had light honey. The highest values of absorbance attain dark honeys. In color space CIE L* a* b* had the largest share of red. Evaluation of the color of honey in the UV/VIS can not prove adulteration of honey always unambiguously, but there are signs by which honey can be described as suspicious. By analyzing the NIR spectrum is falsification of honey demonstrated using discriminant analysis.
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Real-Time Vein Viewer
Slezák, Jakub ; Harabiš, Vratislav (referee) ; Sekora, Jiří (advisor)
This work is focused on methods of real-time vein imaging using a camera in the near infrared region. The theoretical section describes the dependence of reflectance and absorbance of blood and tissue on the wavelength and suggests appropriate ways of illumination and viewing the bloodstream. The paper describes methods for real-time venous processing and projection. Based on theoretical knowledge a device sensing and projecting an image of real time examination of the venous system and a user-friendly programme for operating this device were created. The created device has been tested on a number of people to confirm proper operation.
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Non-invasive Blood Glucose Measuring
Vítová, Hana ; Chmelař, Milan (referee) ; Sekora, Jiří (advisor)
Goal of my master´s thesis is examination of non-invasive blood glucose measurement methods, and designing of device for non-invasive blood glucose reading. The introductory chapter of thesis contains description of know different methods for blood glucose measurement, mainly Near Infra-Red region (NIR) measurement with spectroscopy methods. This project describes pathology of Diabetes Mellitus, specifies how it is divided, and looks also on human metabolism. The theoretical part contains exploration of blood glucose measurement methods. Thesis continues with system scheme design for non/invasive glucose measurement device, based on present knowledge. Major principle of device is measuring with Infra-Red laser, bifurcate optic fiber and photodiode. Design of printed circuit board is also present. Document contains also designs of software diagrams for calibration and processing program written in C# language. Communication between device and computer is made via USB. Microcontroller with C language program is part of designed device. It is used to send measured values into PC and also receives data from computer. This data determines blood glucose concentration and their thresholds.
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Využití spektrofotometrických metod ke kontrole falšování potravin
Pytel, Roman
The theme od this dissertation is " Application of Spectrophotometric methods for inspection adulteration of food". In the theoretical part, there are stated chapters regarding adulteration of food (in general), adulteration of honey, quality requirements on honey, spectroscopy and its categories. The dissertaion is focused on spectrophotometric measurements of honey and sugar syrup samples where colour and consistence of honey was monitored. The techniques used for the analysis are NIR spectrophotometry and UV/VIS spectrophotometry. The results gained were statistically and graphically processed. It follows from the outcome that using FT-NIR for adulteration of honey detection is an appropriate method for honey inspection. The least effective method for proving adulteration of honey is the spectrophotometry specification of the colour of honey. Using this method, it is not possible to prove the links between colour of honey and colour of sugar syrup.
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