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Wyświetlanie 1-15 z 21
Tytuł:
Prenatal development of the stomach in the goat (Capra hircus)
Autorzy:
Wojtasiak, N.
Stankiewicz, T.
Powiązania:
https://bibliotekanauki.pl/articles/2119552.pdf
Data publikacji:
2021
Wydawca:
Polskie Towarzystwo Zootechniczne
Tematy:
prenatal development
organogenesis
stomach
goat
Opis:
During organogenesis in the developing goat embryo, a four-chamber stomach is formed from an extension of the primary intestine. Due to histological and morphological changes, each chamber of the stomach takes on characteristic features associated with its function. The histological structure of the stomach wall consists of four layers, the mucosa, submucosa, tunica muscularis and serosa. This work presents the current state of knowledge of the changes observed in each layer of the developing stomach and its morphogenesis in the prenatal period. Practical applications of this information in prenatal ultrasound diagnostics in goats are suggested as well.
Źródło:
Roczniki Naukowe Polskiego Towarzystwa Zootechnicznego; 2021, 17, 1; 23-32
1733-7305
Pojawia się w:
Roczniki Naukowe Polskiego Towarzystwa Zootechnicznego
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Circannual changes in serum concentrations of thyroxine, calcitonin and parathormone in immature and mature red deer females (Cervus elaphus)
Autorzy:
Kuba, J.
Blaszczyk, B.
Stankiewicz, T.
Kwita, E.
Udala, J.
Powiązania:
https://bibliotekanauki.pl/articles/31677.pdf
Data publikacji:
2015
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Opis:
The aim of this study was to determine circannual changes in the serum concentrations of thyroxine, calcitonin and parathormone in mature and immature red deer females. Blood samples from 8 hinds were collected monthly for 26 months. Secretions of thyroxine and calcitonin showed circannual rhythms with significantly higher levels in the immature hinds compared to the mature animals (p<0.05). For thyroxine, the concentration was higher in the winter/spring period than in summer/autumn (p<0.05), while for calcitonin the concentration profile was the opposite (p<0.05). The concentration of parathormone was significantly higher in summer/autumn that in the other months of the experiment (p<0.01). These results may indicate that the hormones investigated may be involved in the regulation of seasonal reproductive activity and in processes contributing to entering puberty in red deer females.
Źródło:
Polish Journal of Veterinary Sciences; 2015, 18, 3
1505-1773
Pojawia się w:
Polish Journal of Veterinary Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Bacterial contamination of boar semen and its relationship to sperm quality preserved in commercial extender containing gentamicin sulfate
Autorzy:
Gaczarzewicz, D.
Udala, J.
Piasecka, M.
Blaszczyk, B.
Stankiewicz, T.
Powiązania:
https://bibliotekanauki.pl/articles/30463.pdf
Data publikacji:
2016
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Opis:
This study was designed to determine the degree and type of bacterial contamination in boar semen (79 ejaculates from Large White and Landrace boars) and its consequences for sperm quality during storage (27 extended semen samples, 16°C for five days) under practical conditions of artificial insemination (AI). The results revealed the presence of aerobic bacteria in 99% of the ejaculates (from 80 to 370 ×106 colony-forming units/mL). Most of the ejaculates contained two or three bacterial contaminants, while the Staphylococcus, Streptococcus, and Pseudomonas bacterial genera were most frequently isolated. Also detected were Enterobacter spp., Bacillus spp., Proteus spp., Escherichia coli, P. fluorescens, and P. aeruginosa. In general, the growth of certain bacterial types isolated prior to semen processing (Enterobacter spp., E. coli, P. fluorescens, and P. aeruginosa) was not discovered on different days of storage, but fluctuations (with a tendency towards increases) were found in the frequencies of Bacillus spp., Pseudomonas spp., and Staphylococcus spp. isolates up to the end of storage. Semen preserved for five days exhibited decreases in sperm motility and increases in the average number of total aerobic bacteria; this was associated with sperm agglutination, plasma membrane disruption, and acrosome damage. We inferred that, due to the different degrees and types of bacterial contaminants in the boar ejaculates, the inhibitory activity of some antimicrobial agents used in swine extenders (such as gentamicin sulfate) may be limited. Because such agents can contribute to the overgrowth of certain aerobic bacteria and a reduction in the quality of stored semen, procedures with high standards of hygiene and microbiological control should be used when processing boar semen.
Źródło:
Polish Journal of Veterinary Sciences; 2016, 19, 3
1505-1773
Pojawia się w:
Polish Journal of Veterinary Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Oxygraphic evaluation of activity of respiratory enzymes in boars semen
Oksygraficzna ocena aktywności enzymów oddechowych plemników w nasieniu knura
Autorzy:
Kopczynski, P.
Lasota, B.
Ogonski, T.
Stankiewicz, T.
Gaczarzewicz, D.
Skolmowska, M.
Powiązania:
https://bibliotekanauki.pl/articles/82482.pdf
Data publikacji:
2016
Wydawca:
Zachodniopomorski Uniwersytet Technologiczny w Szczecinie. Wydawnictwo Uczelniane ZUT w Szczecinie
Źródło:
Folia Pomeranae Universitatis Technologiae Stetinensis. Agricultura, Alimentaria, Piscaria et Zootechnica; 2016, 40, 4(330)
2081-1284
Pojawia się w:
Folia Pomeranae Universitatis Technologiae Stetinensis. Agricultura, Alimentaria, Piscaria et Zootechnica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Superoxide dismutase and glutathione peroxidase activity in porcine follicular fluid i relation to follicle size, birth status of gilts, ovarian location and year season
Aktywnosc dyzmutazy ponadtlenkowej i peroksydazy glutationowej w swinskim plynie pecherzykowym w odniesieniu do wielkosci pecherzyka, statusu porodowego loch, polozenia jajnika i pory roku
Autorzy:
Lasota, B
Blaszczyk, B.
Stankiewicz, T.
Udala, J.
Szewczyk, M.
Matusiak-Bielska, D.
Powiązania:
https://bibliotekanauki.pl/articles/45154.pdf
Data publikacji:
2009
Wydawca:
Zachodniopomorski Uniwersytet Technologiczny w Szczecinie. Wydawnictwo Uczelniane ZUT w Szczecinie
Tematy:
pig
birth status
oxidative metabolism
embryo energy production
reactive oxygen species
mammal
oocyte
embryo
follicular fluid
porcine oocyte
oxidative stress
glutathione peroxidase
superoxide dismutase
porcine follicular fluid
season
ovarian location
gilt
follicle size
Źródło:
Acta Scientiarum Polonorum. Zootechnica; 2009, 08, 1-2; 19-29
1644-0714
Pojawia się w:
Acta Scientiarum Polonorum. Zootechnica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Evaluation of selenium status and its distribution in organs of free living foxes (Vulpes vulpes) from an Se deficient area
Autorzy:
Pilarczyk, B.
Pilarczyk, R.
Tomza-Marciniak, A.
Hendzel, D.
Bakowska, M.
Stankiewicz, T.
Powiązania:
https://bibliotekanauki.pl/articles/31746.pdf
Data publikacji:
2011
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Opis:
The objective of the study was to determine selenium status and its distribution in the organs of free living foxes from selenium deficient areas of north-western Poland. Samples of organs harvested from 40 foxes shot during the 2008-2009 hunting seasons served as experimental material. Selenium concentration in the organs was determined spectrofluorometrically. Selenium distribution in tissues depends largely on its dietary content. Our study indicated that concentrations of selenium in the examined organs followed the order: kidney>liver>spleen>lung>heart and kidneys were the organ with the highest retention of this element. Mean selenium concentration in fox kidneys was 0.60 ± 0.15 μg/g wet weight. Several times less selenium on average was found in the liver (0.27 ± 0.09 μg/g w.w.), lungs (0.17 ± 0.06 μg/g w.w.), spleen (0.19 ± 0.06 μg/g w.w.) and heart (0.13 ± 0.05 μg/g w.w.). All the animals studied were deficient in selenium.
Źródło:
Polish Journal of Veterinary Sciences; 2011, 14, 3
1505-1773
Pojawia się w:
Polish Journal of Veterinary Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Selected meat and fattening features and sperm quality in young purebred and hybrid boars
Wybrane cechy użytkowości tucznej i mięsnej a jakość nasienia u młodych knurów ras czystych i mieszańców
Autorzy:
Udala, J.
Kwita, E.
Gaczarzewicz, D.
Kuba, J.
Stankiewicz, T.
Blaszczyk, B.
Pilarczyk, B.
Tomza-Marciniak, A.
Bakowska, M.
Powiązania:
https://bibliotekanauki.pl/articles/44978.pdf
Data publikacji:
2015
Wydawca:
Zachodniopomorski Uniwersytet Technologiczny w Szczecinie. Wydawnictwo Uczelniane ZUT w Szczecinie
Źródło:
Acta Scientiarum Polonorum. Zootechnica; 2015, 14, 2
1644-0714
Pojawia się w:
Acta Scientiarum Polonorum. Zootechnica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Serum selenium concentration and glutathione peroxidase activity and selenium content in testes of Polish Konik horses from selenium-deficient area in North-Western Poland
Autorzy:
Pilarczyk, B.
Tomza-Marciniak, A.
Stankiewicz, T.
Blaszczyk, B.
Gaczarzewicz, D.
Smugala, M.
Udala, J.
Tylkowska, A.
Kuba, J.
Ciesla, A.
Powiązania:
https://bibliotekanauki.pl/articles/31875.pdf
Data publikacji:
2014
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Opis:
The aim of this study was to determine serum selenium concentrations in Polish Konik horses residing in the Odra Delta Nature Park (Poland) and to evaluate the activity of glutathione peroxidase and Se content in testes of this horse breed. In over 95% of cases, serum Se concentration was below the optimal range, and none of the horses examined was deficient in this trace element. The lack of Se deficiency in the animals examined suggests however, that the Polish Konik horses have a natural ability to the optimal use of nutrients available in their life area. Testicular content of Se and GSHPx activity in the colts was higher than those found in stallions, and a positive relationship between these antioxidants was demonstrated. The differences in Se contents and GSHPx activities in testes between colts and stallions suggest that selenoenzymes play important roles during the puberty of male horses.
Źródło:
Polish Journal of Veterinary Sciences; 2014, 17, 1
1505-1773
Pojawia się w:
Polish Journal of Veterinary Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Justification for applying expedient/battle damage repairs of weapon systems in combat operations
Uzasadnienie stosowania systemu doraźnych napraw bojowych sprzętu wojskowego podczas operacji wojskowych
Autorzy:
Smal, T.
Stankiewicz, G.
Powiązania:
https://bibliotekanauki.pl/articles/347659.pdf
Data publikacji:
2012
Wydawca:
Akademia Wojsk Lądowych imienia generała Tadeusza Kościuszki
Tematy:
logistyka
wsparcie działań bojowych
naprawy doraźne
utrzymanie systemów uzbrojenia
logistics
combat service support
battlefield maintenance
battle damage repair
Opis:
Every armed conflict is connected with numerous losses in the equipment. Modern armies are still looking for new solutions allowing them to improve the possibilities of the battlefield maintenance system, which will be tailored to the conditions of the contemporary battlefield. One of the solutions is the ER/BDR - expedient repairs and battle damage repairs of weapon systems. The ER/BDR allows one to maintain the suitability of combat vehicles, especially mobility or an ability to provide fire during combat operations. What is more, ER/BDR operations can be conducted directly in the place of damage without the necessity of evacuation to maintenance collection points. In the article the authors present advantages and a justification for applying this solution, which is based on the analysis of theoretical calculations, a few historical data and a simulation they conducted.
Każdy konflikt zbrojny wiąże się z licznymi stratami w uzbrojeniu i sprzęcie wojskowym (UiSW). Nowoczesne armie stale poszukują nowych rozwiązań, które pozwolą na rozwijanie możliwości prowadzenia napraw uszkodzonych systemów uzbrojenia w warunkach polowych oraz będą dostosowane do potrzeb współczesnego pola walki. Jednym z takich rozwiązań jest system doraźnych (improwizowanych) napraw polowych systemów uzbrojenia. Pozwala on utrzymać zdatność UiSW, a zwłaszcza jego mobilność oraz zdolność do prowadzenia ognia w czasie działań bojowych. Co więcej, naprawy ER/BDR mogą być prowadzone bezpośrednio w miejscu uszkodzenia, bez konieczności prowadzenia jego ewakuacji do punktów zbiórki uszkodzonego sprzętu. Oznacza to, że uszkodzone UiSW może znacznie szybciej powrócić do walki. W artykule autorzy prezentują zalety tego rozwiązania, które zostały oparte na analizie teoretycznych kalkulacji, wybranych przykładach i danych historycznych oraz przeprowadzonej symulacji zdarzeń taktyczno-logistycznych.
Źródło:
Zeszyty Naukowe / Wyższa Szkoła Oficerska Wojsk Lądowych im. gen. T. Kościuszki; 2012, 4; 50-57
1731-8157
Pojawia się w:
Zeszyty Naukowe / Wyższa Szkoła Oficerska Wojsk Lądowych im. gen. T. Kościuszki
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A stable density approach to probe selection for a custom aCGH design
Autorzy:
Gambin, T.
Stankiewicz, P.
Gambin, A.
Powiązania:
https://bibliotekanauki.pl/articles/81185.pdf
Data publikacji:
2011
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
genomic region
probe
copy number alternation
comparative genomic hybridization
human genome
microarray
wide range application
gene expression
methylation
binding protein
Źródło:
BioTechnologia. Journal of Biotechnology Computational Biology and Bionanotechnology; 2011, 92, 3
0860-7796
Pojawia się w:
BioTechnologia. Journal of Biotechnology Computational Biology and Bionanotechnology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Simulations of motion of prototype railway wagon with rotatable loading floor carried out in MSC Adams software
Autorzy:
Niezgoda, T.
Krasoń, W.
Stankiewicz, M.
Powiązania:
https://bibliotekanauki.pl/articles/242161.pdf
Data publikacji:
2012
Wydawca:
Instytut Techniczny Wojsk Lotniczych
Tematy:
intermodal transport
railway wagon
simulation of motion
MSC ADAMS
Opis:
The railway wagon with a low flat rotatable loading floor was analysed in the paper. Such a structure can be used for transporting various types of vehicles such as tractors, trucks, trailers, semitrailers, cargo containers. The railway wagon allows quick and fast loading and unloading without any platform infrastructure or terminals. Only a hardened flat surface is required. Each railway wagon can be loaded-unloaded individually (no cranes needed). This construction has a wide range of application and is easy to operate. The model of a railway wagon consisted of standard carriages, undercarriages, and a rotatable loading floor was developed. The model was built of rigid solids. Between individual elements of the model, the appropriate joints and contact connections were created. The model was analysed using MSC Adams code, which allows performance of the 3D kinematic - dynamic analyses of the entire model. The analyses were carried out with use of the model of the loaded semitrailer. Passage of the railway wagon with a trailer on horizontal rails, which are the smallest standard arc with a radius 250m, was simulated at different speed. Reactions occurring in couplings of the rotatable loading floor, which are the main element of connection between the rotatable loading floor and motionless undercarriages part of the frame of the wagon, were tested. The maximum velocity at which the railway wagon can move was analysed as well. There was also examined the speed at which the wheels separate from the rails, what results in derailment of the whole wagon.
Źródło:
Journal of KONES; 2012, 19, 4; 495-502
1231-4005
2354-0133
Pojawia się w:
Journal of KONES
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Hybrid locomotives overview of construction solutions
Autorzy:
Konarzewski, M.
Niezgoda, T.
Stankiewicz, M.
Szurgott, P.
Powiązania:
https://bibliotekanauki.pl/articles/245761.pdf
Data publikacji:
2013
Wydawca:
Instytut Techniczny Wojsk Lotniczych
Tematy:
hybrid powertrain
hybrid locomotive
diesel-electric locomotive
railway vehicles
Opis:
Nowadays, transportation becomes a significant source, apart from factories and power plants, of air pollution. Therefore, due to legal restrictions on the emission of noxious gases, other power sources for vehicles are necessary. Some of these power sources allow replacement of the internal combustion engine completely, whereas the other ones only support the engine operation. Hence, a hybrid powertrain – alternative to the drivetrain equipped with an internal combustion engine only – is increasingly being used. The hybrid powertrain was mostly applied in cars and buses but recently it has been also used in railway vehicles such as locomotives and multiple units. The paper presents a shortened and brief overview of construction solutions of selected hybrid locomotives. A list of the applied hybrid drive systems as well as the basic data and properties are provided. The most important variants of vehicles are compared. The presented material allows identification of the development trends in the considered area. The hybrid locomotive usually uses an onboard rechargeable energy storage system, placed between the power source and the traction transmission system connected to the wheelsets. Modification of a classic diesel-electric locomotives is a relatively simple procedure since they have all the components of a series hybrid transmission except the storage battery. Therefore, the existing and operated diesel-electric locomotives can be modified to increase their efficiency and reduce operating costs and emissions.
Źródło:
Journal of KONES; 2013, 20, 1; 127-134
1231-4005
2354-0133
Pojawia się w:
Journal of KONES
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Research on heat flow in granite sample using thermal imaging camera
Autorzy:
Małek, E.
Miedzińska, D.
Niezgoda, T.
Stankiewicz, M.
Powiązania:
https://bibliotekanauki.pl/articles/242569.pdf
Data publikacji:
2016
Wydawca:
Instytut Techniczny Wojsk Lotniczych
Tematy:
thermovision
thermal imaging camera
temperature distribution
granite
aluminum foam sample
heat flow
Opis:
Research on heat flow in granite sample and sample of aluminium foam with the use of a thermal imaging camera is presented in the paper. Temperature distribution on the surface of the sample as a function of time was obtained on the basis of data from the thermal imaging camera. Thermovision is one of the most universal technology, which is applied for detection of infrared radiation. This technique allows observing and record infrared radiation emitted by objects located in the surrounding environment. This technology allows obtaining, in a short time, temperature distribution on the surface of the sample. The thermograms (pictures showing on the surface of the object) are types of photos showing temperature distribution on the tested object surface which is achieved on the base of a specified range of electromagnetic radiation. Accurate measurement of the temperature distribution on the heated granite sample surface was obtained using a thermal imaging camera FLIR SC 6000. Thermal imaging camera was connected to the computer equipped with control software FLIR ResearchIR Max. Heat source was applied in the experiment as a cast iron hotplate with high efficiency heating, gradual control and 1500W power. Obtained results showed regular temperature distribution over the surface of researched sample.
Źródło:
Journal of KONES; 2016, 23, 4; 327-333
1231-4005
2354-0133
Pojawia się w:
Journal of KONES
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Biometric speech signal processing in a system with digital signal processor
Autorzy:
Marciniak, T.
Weychan, R.
Stankiewicz, A.
Dąbrowski, A.
Powiązania:
https://bibliotekanauki.pl/articles/200794.pdf
Data publikacji:
2014
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
biometry
speech processing
digital signal processor
Gaussian mixture models
vector quantization
Opis:
This paper presents an analysis of issues related to the fixed-point implementation of a speech signal applied to biometric purposes. For preparing the system for automatic speaker identification and for experimental tests we have used the Matlab computing environment and the development software for Texas Instruments digital signal processors, namely the Code Composer Studio (CCS). The tested speech signals have been processed with the TMS320C5515 processor. The paper examines limitations associated with operation of the realized embedded system, demonstrates advantages and disadvantages of the technique of automatic software conversion from Matlab to the CCS and shows the impact of the fixed-point representation on the speech identification effectiveness.
Źródło:
Bulletin of the Polish Academy of Sciences. Technical Sciences; 2014, 62, 3; 589-594
0239-7528
Pojawia się w:
Bulletin of the Polish Academy of Sciences. Technical Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Indentification of three different chromosomal additions by chromosome painting using fluorescence in situ hybridization [FISH] technique
Autorzy:
Bocian, E
Stankiewicz, P
Stanczak, H
Obersztyn, E
Mazurczak, T
Powiązania:
https://bibliotekanauki.pl/articles/2047283.pdf
Data publikacji:
1996
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
chromosomal addition
fluorescence in situ hybridization method
hybridization
chromosome painting
cytogenetics
Opis:
Fluorescence in situ hybridization (FISH) is a very useful method for assessing chromosome rearrangements. When neither banding pattern nor clinical symptoms are sufficient to determine the origin of additional chromosomal fragment, FISH with multiple chromosome-specific libraries (chromosome painting), allows to solve this diagnostic problem rapidly. Three chromosomal additions, 7q+, 13p+ and 22q+, found in routine cytogenetic studies performed in children with phenotypic abnormalities were analysed using FISH. This technique documented the origin of the extra material to be derived from chromosome 16[der(7)t(7; 16)(q36.3;p 13.11)], 18[der(13)t(13; 18)(p12;q 12.2)] and 22[dup(22)(q11.2q13.1)], respectively. In two cases the abnormality arose de novo, while in the third case the product of translocation t(13;18) was maternal by origin. It was present in 30% of mother's lymphocytes, and in 70% of them a balanced Robertsonian translocation t(13q;15q) was found. In the presented cases the chromosome analysis with both traditional banding and chromosome painting techniques, allowed to establish final clinical diagnosis.
Źródło:
Journal of Applied Genetics; 1996, 37, 2; 197-204
1234-1983
Pojawia się w:
Journal of Applied Genetics
Dostawca treści:
Biblioteka Nauki
Artykuł
Wyświetlanie 1-15 z 21

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