Wyniki wyszukiwania - Biblioteka Nauki

1

Wpływ parametrów konstrukcyjnych przewodów wtryskowych na proces zasilania gazem silnika o zapłonie iskrowym

100%

Rola M.

Combustion Engines

|

2015

|

tom R. 54, nr 3

540--547

PL

W artykule przedstawiono wyniki badań ciśnienia w przewodzie gazowym. Badania wykonano dla różnych konfiguracji układu wtryskowego (średnica i długość przewodu) oraz wybranych warunków obciążenia silnika. Uzyskane wyniki poddano analizie pod kątem wpływu wartości średnicy wewnętrznej i długości przewodu gazowego łączącego impulsowy zawór gazu z przewodem dolotowym oraz wartości średnicy dyszy wtryskowej zamocowanej w ściance przewodu dolotowego silnika na potrzebną wartość czasu impulsu sterującego wtryskiwaczem, gwarantującą podanie odpowiedniej dawki paliwa gazowego. Przeprowadzona analiza istotności różnic wartości średnich wykonanych pomiarów wykazała zróżnicowanie procesów gazodynamicznych w przewodzie gazowym. Zróżnicowanie to w zależności od parametrów konstrukcyjnych wpływa na przebieg wtrysku w silniku o zapłonie iskrowym. Tym samym wpływa na błąd sterowania składem mieszanki. Na podstawie analizy wyników wykazano, że zwiększająca się długość przewodu i zmniejszająca się średnica dyszy powodują zwiększenie czasu wtrysku paliwa gazowego w stosunku do wartości czasu wtrysku wtryskiwacza bezpośrednio połączonego z przewodem dolotowym.

EN

This paper presents the research results on gas inlet pressure. Varied configurations of an injection system (varied duct diameters and lengths) and selected engine loads were investigated. The results were studied to specify how the desired time of a pulse to control an injector to provide a correct dose of gas is impacted by an internal diameter and length of injection ducts connecting a pulse gas injector and an inlet duct as well as a diameter of an injection nozzle installed at an intake duct wall. The significance of discrepancies in the mean values of the measurements was investigated and showed that gaseous and dynamic processes in a gas ducts can differ. Accordingly, as regarded engine design parameters, the course of injection in spark-ignition engines and thus the control error of mixture composition are impacted. Our study demonstrates that with increasing duct lengths and decreasing nozzle diameters, the time to inject gaseous fuels can be longer in relation to the time to inject gaseous fuels if an injector is directly connected to the intake duct.

2

Notowania cen podstawowych produktów rolniczych w powiecie pilskim za I półrocze 2016 roku

75%

Rola M.

|

nr 07-08

3

Latencja retrowirusow na przykladzie wirusa enzootycznej bialaczki bydla [BLV]

63%

Kuzmak J. , Rola M.

Postępy Mikrobiologii

|

1999

|

tom 38

|

nr 4

335-344

4

Zastosowanie rybozymow 'hammerhead' jako czynnikow przeciwwirusowych.

63%

Rola M. , Kuzmak J.

Postępy Biochemii

|

2001

|

tom 47

|

nr 4

282-291

5

Wirus niedoboru odpornosci bydla - nowe dane

63%

Rola M. , Kuzmak J.

Medycyna Weterynaryjna

|

2004

|

tom 60

|

nr 08

789-792

6

Wplyw krzyzowania towarowego swin rasy pulawskiej z rasami wbp i pbz na jakosc kulinarna miesa

51%

Florowski T. , Pisula A. , Rola M. , Adamczak L.

|

nr 1

25-34

7

Ocena metod serologicznych w diagnostyce zakazen wirusem maedi-visna u owiec

51%

Kozaczynska B. , Kuzmak J. , Rola M.

Medycyna Weterynaryjna

|

2002

|

tom 58

|

nr 06

444-447

8

Interferon activity in sera and culture supernatants of PBMC from sheep infected with bovine immunodeficiency virus (BIV)

51%

Rola M. , Szuster-Ciesielska A. , Kandefer-Szerszen M. , Kuzmak J.

Polish Journal of Veterinary Sciences

|

2001

|

tom 04

|

nr 3

9

Porownanie metod PCR i ELISA w diagnostyce zakazen wirusem maedi-visna u owiec

51%

Kuzmak J. , Rola M. , Kozaczynska B. , Chebloune Y.

Medycyna Weterynaryjna

|

2002

|

tom 58

|

nr 12

969-972

10

Dydaktyczne znaczenie programu Modelica w kształceniu technicznym

51%

Rola M. , Grabowski M. , Jakliński P.

|

tom nr 1

73-80

PL

W artykule przedstawiono możliwości zastosowania programu Modelica do modelowania zjawisk fizycznych w czasie kształcenia technicznego. Opisano biblioteki dostępne w pakiecie programu Modelica oraz przykładowe zastosowania tego programu.

EN

This paper presents various possibilities of application of Modelica program for modeling physical phenomena in the technical education. It also describes libraries available in Modelica and gives some model application of this program.

11

Porownanie miesnosci i jakosci technologicznej miesa swin rasy pulawskiej i jej krzyzowek z rasami wielka biala polska i polska biala zwisloucha

51%

Florowski T. , Pisula A. , Rola M.

|

nr 05

673-676

EN

The aim of this study was to compare the meatiness and technological quality of meat from traditional Polish Pulawy breed pigs and its crosses with Polish Large White and Polish Landrace pigs. It was observed that the highest technological quality came from meat from crosses of Pulawy and Polish Landrace pigs. The pH₁ and pH₂ value typical for high quality pork, low quantity of drip loss, good water holding capacity, and the highest weight gain during wet salting was observed in meat from this group. Based on the results of our study cross breeding of traditional Polish Pulawy breed and Polish Landrace pigs can be recommended in order to improve the technological quality of pork.

12

Application of PCR technique in diagnosis of small ruminant lentivirus infection in sheep and goats

51%

Gil A. , Rola M. , Kuzmak J.

Polish Journal of Veterinary Sciences

|

2006

|

tom 09

|

nr 4

EN

Detection of small ruminant lentiviruses (SRLVs) in sheep and goats usually relies on serological testing. In this study, we evaluated semi-nested PCR and nested PCR techniques applied as a diagnostic tool for detection of maedi-visna virus (MVV) and caprine arthritis-encephalitis virus (CAEV) in naturally infected sheep and goats, respectively. The examination of 193 ovine and 85 caprine serum samples by the ELISA revealed the presence of specific antibodies in 133 (69%) and 18 (21.2%) animals, respectively. Presence of proviral DNA was manifested in 103 (53.4%) sheep and 12 (14.2%) goats. Despite the relatively lower sensitivity of PCR, the fact of detection of proviral DNA in 19 out of 60 ovine samples and 7 out of 67 caprine samples collected from animals previously negative by ELISA was noteworthy. In conclusion, the data demonstrated that combinations of both ELISA and PCR might afford optimal detection of SRLVs infection.

13

Experimental infection of sheep with bovine immunodeficiency virus

51%

Bicka L. , Rola M. , Kuzmak J.

Bulletin of the Veterinary Institute in Puławy

|

2000

|

tom 44

|

nr 1

EN

Five sheep were experimentally infected with bovine immunodeficiency virus (BIV). All animals seroconverted to BIV p26 core protein by 6 weeks after inoculation and developed persistent lymphocytosis. Proviral DNA has been continually detected only in one sheep and temporarily present in other two animals. All attempts to rescue the BIV from peripheral blood leukocytes of uninfected sheep have failed during experiment. The established model of bovine lentivirus infection in sheep provides valuable data to examine the pathogenesis of BIV and related retroviral infections.

14

Reactivity of serum from cattle suspected of bovine leukaemia virus infection to peptides representing mutated epitopes on envelope glycoprotein gp51

51%

Rola M. , Materniak M. , Kuzmak J.

|

2008

|

tom 52

|

nr 3

EN

The ELISA technique with synthetic peptides as an antigen was developed to analyse the reactivity of bovine serum directed to mutated epitopes on envelope glycoptrotein gp51 of bovine leukaemia virus (BLV). The peptides represented normal and mutated G, H, and GG epitopes deduced from wild type BLV and its genetic variants, respectively. When 436 sera identified as seronegative by commercially available ELISA were tested by newly developed peptide ELISA, 14 samples revealed the highest reactivity. Out of them, reactivity to the mutated epitope GG was found in eight samples, while five and two samples reacted to epitopes G and H, respectively. One serum showed the reactivity to two peptides. Sera, which reacted with the epitope G, were found mostly in animals from one herd, while the distribution of sera that reacted to epitopes GG and H were less restricted to the particular herds. It has been concluded that sera showing strong reactivity to mutated peptides could represent animals infected with BLV variants, which escape antibody detection.

15

Badania symulacyjne układu zasilania gazem propan-butan silnika o zapłonie iskrowym

45%

Rola M. , Wendeker M. , Jakliński P. , Grabowski Ł. , Szlachetka M.

Silniki Spalinowe

|

2007

|

tom R. 46, nr SC2

157-163

PL

W artykule przedstawiono budowę oraz wyniki badań dla układu łączącego wtryskiwacz gazowy z przewodem kolektora dolotowego. Badania zostały przeprowadzone z zastosowaniem programu symulacyjnego Dymola. Badano zależność pomiędzy wybranym parametrem konstrukcyjnym przewodu wtryskowego a przepływem gazu do kolektora dolotowego w czasie wtrysku. Analizie poddano zjawiska zachodzące w jednym z przewodów wtryskowych w zależności od średnicy wkrętki.

EN

The paper presents the design and test results for the system combining gas injector with the inlet manifold pipe. Tests were carried out with the use of Dymola simulation program. The test investigated the dependency between a selected design parameter of inlet pipe and the gas flow into inlet manifold during injection. The analysis covered the processes taking place in one of the inlet pipes depending on the ferrule diameter.

16

FACS analysis of lymphocyte populations in sheep and cattle infected with bovine immunodeficiency virus and bovine leukemia virus

45%

Kozaczynska B. , Bicka L. , Rola M. , Winnicka A. , Kuzmak J.

Polish Journal of Veterinary Sciences

|

2001

|

tom 04

|

nr 3

17

Transplantacja zarodkow jako metoda uzyskiwania owiec wolnych od zakazenia wirusem maedi-visna

45%

Rola M. , Gil A. , Murawski M. , Wierzchos E. , Kuzmak J.

|

tom 62

|

nr 08

942-945

EN

The transmission of maedi-visna wirus (MVV) through embryons collected from virus infected ewes and then transferred to uninfected recipients was investigated. Early sheep embryos were isolated from four in vivo-fertilized, MVV infected donors, which were determined to be positive by ELISA and PCR. A total of fifty-two morula and blastocyst stage embryos were washed ten times and transferred (two or three per recipient) to twenty-two serologically negative sheep. Three ewes became pregnant, delivering three live kids out of which one died immediately after delivery. All two kids were then kept over 72-weeks-of-age and neither MVV specific antibodies nor proviral DNA was found in the blood samples collected before colostrum suckling, as well as after 14, 32, 56 and 72-weeks-of-age. Additionally, no active virus particules were found when tested by syncytia formation assay. This study demonstrated that it is possible to obtain transferable stage embryos from donor ewes infected with MVV, in vivo fertilized by infected rams, and that collected embryos are unlikely to transmit MVV infection to the resulting offspring.

18

Isolation and characterization of caprine arthritis encephalitis virus in goats from Poland

45%

Kaba J. , Rola M. , Materniak M. , Kuzmak J. , Nowicki M.

|

nr 2

183-188

EN

The caprine arthritis-encephalitis virus (CAEV) was isolated from monocyte-derived macrophages (M/M), but not from PBMC of seropositive goats by co-cultivation with goat synovial membrane cells. Out of eight M/M co-cultures, CAEV was evidenced by the syncytia formation and presence of proviral DNA in two and four cultures, respectively. Two virus isolates from co-cultures showing cytopathic effects were further confirmed as CAEV by western blotting, PCR, and sequence analysis. The nucleotide sequence of gag gene showed 92.0% and 90.3% homology to the prototype CAEV-Co strain. Supernatants harvested from these cultures induced syncytia when cultured with uninfected cells and the resultant titer was 1035 and 1025 TCID50 per ml. New CAEV isolates are suitable candidates for further analysis of their genetic and biological properties.

19

Charakterystyka mutantow genetycznych wirusa enzootycznej bialaczki bydla i ich znaczenie w diagnostyce serologicznej

45%

Bicka L. , Rola M. , Kozaczynska B. , Stec J. , Kuzmak J.

|

nr 06

699-702

20

Model procesu tworzenia mieszanki gazowo-powietrznej w silniku o zapłonie iskrowym

38%

Wendeker M. , Pietrykowski K. , Grabowski Ł. , Rola M. , Sochaczewski R. , Barański G.

Silniki Spalinowe

|

2011

|

tom R. 50, nr 3

PL

W artykule przedstawiono wyniki badań modelowych procesu napełniania silnika zasilanego gazem propan-butan. Geometrię modelu oparto na rzeczywistym czterocylindrowym silniku ZI o pojemności skokowej równej 2 dm3. Model silnika oraz badania symulacyjne wykonano w programie AVL FIRE. We wszystkich badanych przypadkach masa paliwa dostarczona do cylindra była niezmienna. Badania wykonano dla kilku wartości czasu otwarcia wtryskiwacza oraz kilku wartości wydatku wtryskiwacza. Analizie poddano wpływ masowego natężenia przepływu gazu przez wtryskiwacz na depozycję paliwa w komorze spalania. Wykazano, że zmiana przebiegu wtrysku wpływa na rozkład paliwa w cylindrze. Wyznaczono wartości koncentracji paliwa w pobliżu świecy zapłonowej.

EN

The paper presents the results of the modelling for the filling process of a propane-butane powered engine. The geometry of a model was based on a real 4-cylinder SI engine of an engine displacement of 2 dm3. The engine model and simulations were performed using the AVL FIRE software. The mass of the fuel supplied to a cylinder identical in all the cases. The study was performed for several values injector opening time, and some of the expense of the injector. The analysis focused on the impact of the gas mass flow through an injector on the fuel deposition in a combustion chamber. It was demonstrated that a change in the course of injection influenced the distribution of fuel in a cylinder. The values of the fuel concentration near a spark plug were also specified.