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Szczebiot R.,Lomza State University of Applied Sciences | Cieslik S.,University of Technology and Life Sciences in Bydgoszcz
Przeglad Elektrotechniczny | Year: 2011

The paper presents a modelling method of optimal connection of wind generators to a medium voltage (MV) power grid taking into account minimum active power losses. A genetic algorithm was applied to optimize active power losses in the power grid.


Biller E.,Lomza State University of Applied Sciences | Boselli E.,Marche Polytechnic University | Obiedzinski M.,Lomza State University of Applied Sciences | Karpinski P.,Warsaw University of Life Sciences | Waszkiewicz-Robak B.,Lomza State University of Applied Sciences
Meat Science | Year: 2016

Raw pork neck cutlets were marinated in an aqueous solution of acetic acid (pH 4, 24 h, 4 °C) without (M) or with 1% (w/w) of glucose. The control (K) was formed by non-treated raw pork neck. The cutlets were then broiled (185 °C, 30 min). In all K cutlets, significant higher amounts of volatile compounds (VCs) were developed after broiling than the other samples. Significant more aldehydes and alcohols were present in the inner parts than in the surface. The correlation between surface and internal layers was high only for aldehydes. Marinating decreased the differences among VCs and led to the standardization of the processed meat. The addition of glucose to the marinade led to more volatile aldehydes, carboxylic acids, esters, furan, pyran, pyrazine, pyrrol and pyridine derivatives than in M samples. Several (53) specific VCs explained the differences among the surface samples related to the marinating process. However, only 16 VCs explained the variance among the inner parts. © 2016 Elsevier Ltd


PubMed | Lomza State University of Applied Sciences, Marche Polytechnic University and Warsaw University of Life Sciences
Type: | Journal: Meat science | Year: 2016

Raw pork neck cutlets were marinated in an aqueous solution of acetic acid (pH4, 24h, 4C) without (M) or with 1% (w/w) of glucose. The control (K) was formed by non-treated raw pork neck. The cutlets were then broiled (185C, 30min). In all K cutlets, significant higher amounts of volatile compounds (VCs) were developed after broiling than the other samples. Significant more aldehydes and alcohols were present in the inner parts than in the surface. The correlation between surface and internal layers was high only for aldehydes. Marinating decreased the differences among VCs and led to the standardization of the processed meat. The addition of glucose to the marinade led to more volatile aldehydes, carboxylic acids, esters, furan, pyran, pyrazine, pyrrol and pyridine derivatives than in M samples. Several (53) specific VCs explained the differences among the surface samples related to the marinating process. However, only 16 VCs explained the variance among the inner parts.


Wojcik B.,Medical University of Bialystok | Wojcik B.,Lomza State University of Applied Sciences | Baranowski M.,Medical University of Bialystok | Chabowski A.,Medical University of Bialystok | And 2 more authors.
Journal of Physiology and Pharmacology | Year: 2015

Bioactive sphingolipids play important role in regulation of the function of the cardiomyocytes. There are no data available on metabolism of the sphingolipids in the heart under increased work-load produced by tachycardia. The aim of the present study was to examine effect of tachycardia on the level of the principal bioactive sphingolipids in the left and right ventricles. The experiments were carried out on male Wistar rats. After anesthesia, two electrodes were administered into the right common jugular vein so that their tips were placed at the vein’s aperture. The resting heart rate was 355 ± 24/min and the rate of stimulation was 600/min. EKG was continuously monitored. The stimulation time was 30 and 60 min. Thereafter, blood from the abdominal aorta and samples of the left and right ventricle were taken. The following bioactive sphingolipids were quantified by means of high performance liquid chromatography: sphinganine, ceramide, sphingosine, sphingosine-1-phosphate and sphinganine-1-phosphate. In the left ventricle, 30 and 60 min tachycardia elevated the level of sphingosine, reduced the level of sphingosine-1-phosphate and sphinganine-1- phosphate. The level of ceramide was reduced only after 60 min. In the right ventricle, 60 min pacing resulted in elevation in the level of sphingosine and sphinganine and reduction in the level of other compounds studied. It is concluded that tachycardia induces changes in metabolism of bioactive sphingolipids in each ventricle. The changes may affect cardiomyocyte functions. Also, differences in sphingolipid metabolism between both ventricles are reported. © 2015 Polish Physiological Society. All rights reserved.


Lebensztejn D.M.,Medical University of Bialystok | Flisiak-Jackiewicz M.,Medical University of Bialystok | Bialokoz-Kalinowska I.,Lomza State University of Applied Sciences | Bobrus-Chociej A.,Medical University of Bialystok | Kowalska I.,Medical University of Bialystok
Acta Biochimica Polonica | Year: 2016

becoming the most common chronic liver pathology both in adults and children. NAFLD manifestation ranges from a simple liver steatosis to steatohepatitis (nonalcoholic steatohepatitis - NASH), which may progress to advanced fibrosis, cirrhosis and end-stage liver disease. Due to the coexistence of visceral obesity, insulin resistance and dyslipidemia, NAFLD is considered to be the hepatic manifestation of metabolic syndrome. In recent years, in the pathogenesis of metabolic syndrome, type 2 diabetes mellitus, cardiovascular disease and also NAFLD, more and more attention has been paid to the so-called organokines, proteins with both paracrine or/and endocrine activities. These include most known adipokines (mainly produced by adipose tissue), myokines (mainly produced by skeletal muscles) and hepatokines exclusively or predominantly produced by the liver. It was shown that the liver may affect the lipids and glucose metabolism by hepatokines released into the blood and NAFLD seems to be associated with altered hepatokines production. Fetuin-A, fibroblast growth factor-21 (FGF-21), selenoprotein P, sex hormone-binding globulin (SHBG), angiopoietin-related growth factor (also known as angiopoietin-related protein 6) and leukocyte derived chemotaxin 2 (LECT2) are considered as the most important hepatokines. In this review, we provide an overview of the main hepatokines and we summarize the association of liver-derived proteins with the development and progression of NAFLD.


Peksa A.,Wrocław University of Environmental and Life Sciences | Kita A.,Wrocław University of Environmental and Life Sciences | Carbonell-Barrachina A.A.,University Miguel Hernández | Miedzianka J.,Wrocław University of Environmental and Life Sciences | And 6 more authors.
LWT - Food Science and Technology | Year: 2016

The development of functional corn snacks by adding nutritional rich additives is an interesting strategy to promote the consumption of antioxidant rich ingredients, such as polyphenols. Flours made from Jerusalem artichoke tubers, amaranth seeds, and pumpkin flesh were added at level of 10% to corn grits in twin-screw extrusion at the head zone temperatures of 120, 140, or 160 °C and two levels of screw rotation speed (200 and 300 rpm). The use of amaranth seeds flour and in a lower degree of Jerusalem artichoke flour is recommended. Amaranth flour did not change significantly sensory attributes (especially the appearance and texture) of regular corn snacks and significantly increased the total polyphenols content, TPC up to 3449 mg 100 g-1 dry matter (dm), particularly when extruded at a temperature of 160 °C and a screw rotation speed of 300 rpm. The effects of Jerusalem artichoke and pumpkin on the structure of the corn snacks were so negative that preclude their used in this industrial application, even though drastic increases in the antioxidant capacity and TPC were observed. © 2016 Elsevier Ltd.


PubMed | Medical University of Bialystok and Lomza State University of Applied Sciences
Type: Journal Article | Journal: Acta biochimica Polonica | Year: 2016

Nowadays non-alcoholic fatty liver disease (NAFLD) is becoming the most common chronic liver pathology both in adults and children. NAFLD manifestation ranges from a simple liver steatosis to steatohepatitis (nonalcoholic steatohepatitis - NASH), which may progress to advanced fibrosis, cirrhosis and end-stage liver disease. Due to the coexistence of visceral obesity, insulin resistance and dyslipidemia, NAFLD is considered to be the hepatic manifestation of metabolic syndrome. In recent years, in the pathogenesis of metabolic syndrome, type 2 diabetes mellitus, cardiovascular disease and also NAFLD, more and more attention has been paid to the so-called organokines, proteins with both paracrine or/and endocrine activities. These include most known adipokines (mainly produced by adipose tissue), myokines (mainly produced by skeletal muscles) and hepatokines exclusively or predominantly produced by the liver. It was shown that the liver may affect the lipids and glucose metabolism by hepatokines released into the blood and NAFLD seems to be associated with altered hepatokines production. Fetuin-A, fibroblast growth factor-21 (FGF-21), selenoprotein P, sex hormone-binding globulin (SHBG), angiopoietin-related growth factor (also known as angiopoietin-related protein 6) and leukocyte derived chemotaxin 2 (LECT2) are considered as the most important hepatokines. In this review, we provide an overview of the main hepatokines and we summarize the association of liver-derived proteins with the development and progression of NAFLD.


Piasecki W.,University of Physical Education in Warsaw | Charmas R.,Lomza State University of Applied Sciences
Adsorption | Year: 2016

We developed a theoretical model which describes the influence of the applied potential to the wall of an oxide nanochannel on the diffuse layer potential in the solution filling the nanopore. It was assumed that the surface of oxide is energetically heterogeneous and electrolyte ions from the solution can adsorb on channel walls. We performed calculations for two oxides: SiO2 and Al2O3. It was found that energetically heterogeneous oxide surfaces strongly suppress gating potential. Moreover, taking into account ion adsorption considerably increased the electrokinetic potential and reduced the influence of applied potential on the electric double layer in the solution. The density of surface sites is the key parameter in the modeling of oxide nanochannels. Low density of surface hydroxyl groups significantly increases susceptibility on electrofluidic gating. © 2016 The Author(s)


Tykocki J.,Lomza State University of Applied Sciences | Jordan A.,Lomza State University of Applied Sciences | Surowik D.,Lomza State University of Applied Sciences
Przeglad Elektrotechniczny | Year: 2015

The paper presents the “Pareto Principle” used for temperature analysis of a high voltage cable core of 110kV working in a three-phase system. The study makes use of a multi-criteria Pareto model and ABC charts to determine the qualitative and quantitative impact of some specific parameters on the temperature of the cable core. © 2015, Przegląd Elektrotechniczny. All rights reserved.


Lewicki P.,Lomza State University of Applied Sciences
Zywnosc. Nauka. Technologia. Jakosc/Food. Science Technology. Quality | Year: 2010

In the paper, the changes are presented that occur in seeds whilst they sprout, as is the connection between the sprouting seeds and the chemical composition thereof. The sprouts have been proved to be a rich source of basic food components such as amino acids, vitamins, minerals, unsaturated fatty acids, and dietary fibre. Moreover, the sprouts contain those compounds, which are absent, or occur in small amounts in other food products. First of all, they are compounds showing antioxidant activity. Furthermore, some examples are given to demonstrate the impact of technological parameters and composition of moisturizing fluid on the sprouting process and on the chemical composition of sprouts. The production of sprouts is simple and makes it possible to produce sprouts containing abounding amounts of a required component or components. The microbiological quality of sprouts can constitute a problem both during the production process and when selling sprouts. Hence, the sprouts should be deemed as a raw material for processing, such as drying, freezing, and preserving in hermetically sealed cans, or as a source of natural components that are essential for diet.

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