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    Wyświetlanie 1-14 z 14
    Tytuł:
    Influence of maize silage storage conditions on biogas efficiency
    Wpływ warunków przechowywania kiszonki z kukurydzy na jej wydajność biogazową
    Autorzy:
    Kozłowski, K.
    Dach, J.
    Czekała, W.
    Lewicki, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/337504.pdf
    Data publikacji:
    2016
    Wydawca:
    Sieć Badawcza Łukasiewicz - Przemysłowy Instytut Maszyn Rolniczych
    Tematy:
    maize silage
    storage
    methane fermentation
    biogas
    kiszonka z kukurydzy
    przechowywanie
    fermentacja metanowa
    biogaz
    Opis:
    The paper presents the issue of the influence of the conditions of maize silage storage on its energy value in the process of methane fermentation. For this purpose, the biogas and methane efficiencies of silage stored under anaerobic and aerobic conditions have been compared. On the basis of executed studies, it has been stated that the process of silage storage and its protection against the contact with air (oxygen) has a very large impact on its quality as a substrate for biogas plants. The silage stored in an oxygen atmosphere produced approx. 80 m3·Mg-1 of biogas less compared with silage stored under anaerobic conditions, and converting to an organic dry matter, its energy value expressed in produced methane decreases by approx. 70 m3·Mg-1.
    W pracy przedstawiono problem wpływu warunków przechowywania kiszonki z kukurydzy na jej wartość energetyczną w procesie fermentacji metanowej. W tym celu porównano wydajności biogazową i metanową kiszonki przechowywanej w warunkach beztlenowych oraz składowanej przy dostępie powietrza (w warunkach tlenowych). W wyniku realizacji badań stwierdzono, że sposób składowania kiszonki i jej ochrona przed kontaktem z powietrzem (tlenem) ma bardzo duży wpływ na jej jakość jako substratu do biogazowni. Kiszonka składowana w atmosferze tlenowej wyprodukowała bowiem ok. 80 m3·Mg-1 biogazu mniej w porównaniu do kiszonki składowanej beztlenowo, a w przeliczeniu na organiczną suchą masę jej wartość energetyczna wyrażona w produkowanym metanie spadła o ok. 70 m3·Mg-1.
    Źródło:
    Journal of Research and Applications in Agricultural Engineering; 2016, 61, 3; 240-243
    1642-686X
    2719-423X
    Pojawia się w:
    Journal of Research and Applications in Agricultural Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Evaluation of changes of stereological parameters of eutectic phases in AlSiMg alloy after precipitation hardening
    Ocena zmian parametrów stereologicznych faz eutektycznych w stopie AlSiMg po utwardzaniu wydzieleniowym
    Autorzy:
    Grzegorek, J.
    Tarasek, A.
    Olszowska-Sobieraj, B.
    Lewicki, P.
    Powiązania:
    https://bibliotekanauki.pl/articles/264278.pdf
    Data publikacji:
    2017
    Wydawca:
    Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
    Tematy:
    qualitative analysis
    AlSiMg alloys
    stereological parameters
    analiza ilościowa
    stopy AlSiMg
    parametry stereologiczne
    Opis:
    Qualitative microstructure investigations of the AlSiMg alloy’s microstructure in both its original state (with the characteristic primary structure) and after precipitation hardening revealed the significant heterogeneity of the eutectic phases concerning their shape, size, and distribution. An evaluation of the stereological parameters of the eutectic phases was carried out. The computer‑image analysis was performed in order to define the fraction of the relative volume and shape of the eutectic phases and to establish their influence on the mechanical properties.
    Jakościowe badania mikrostruktury stopu AlSiMg, zarówno w stanie wyjściowym (o charakterystycznej strukturze pierwotnej), jak i po utwardzaniu wydzieleniowym, wykazały występowanie w badanym stopie istotnych niejednorodności faz eutektycznych pod względem kształtu, wielkości oraz rozmieszczenia. W pracy przeprowadzono ocenę parametrów stereologicznych faz eutektycznych w stopie AlSiMg zarówno w stanie wyjściowym, jak i po utwardzaniu wydzieleniowym. Wykorzystując analizę obrazu komputerowego, określono udział objętościowy względnej faz eutektycznych oraz ich kształt, a także ustalono ich wpływ na właściwości mechaniczne.
    Źródło:
    Metallurgy and Foundry Engineering; 2017, 43, 3; 169-177
    1230-2325
    2300-8377
    Pojawia się w:
    Metallurgy and Foundry Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Methane emission from animal production in Poland: scale and potential costs
    Emisja metanu z produkcji zwierzęcej w Polsce: skala oraz potencjalne koszty
    Autorzy:
    Dach, J.
    Przybył, J.
    Zbytek, Z.
    Lewicki, A.
    Janczak, D.
    Cieślik, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/337211.pdf
    Data publikacji:
    2013
    Wydawca:
    Sieć Badawcza Łukasiewicz - Przemysłowy Instytut Maszyn Rolniczych
    Tematy:
    animal production
    pigs
    cows
    methane emissions
    costs
    Polska
    produkcja zwierzęca
    świnie
    krowy
    emisja metanu
    koszty
    Polska
    Opis:
    The animal production is responsible for almost 1/5 world greenhouse gases emissions (without taking into account the vapor of water emission). The aim of this paper was to analyze the literature data in the field of studies on methane emissions from animal husbandry (including manure management), to estimate the total scale of the emission in case of Poland and the size for different kinds of typical farms as well as the approximate cost analysis of this emission in case of "methane" tax implementation. It was found that depending on the price scenario (4.07-30 euro Mg-1 CO2eq) costs of methane emission from animal production are widely different and can reach even over 190 million euro in scale of whole Poland. Comparing the methane emission from pigs production (0.35 million tonnes / year) with the one from cows breeding (6.348 million tones / year) a huge disproportion between those values is clearly visible. Methane emission from pigs production is in fact more than 18 times lower.
    Hodowla zwierzęca jest odpowiedzialna za blisko 1/5 światowej emisji gazów cieplarnianych (bez uwzględnienia emisji pary wodnej). Celem niniejszej pracy była analiza danych literaturowych w zakresie badań emisji metanu z hodowli zwierzęcej (z uwzględnieniem zagospodarowania nawozów naturalnych), oszacowanie jej ogólnej skali dla Polski oraz wielkości dla różnych wielkości typowych farm jak również przybliżona analiza kosztów tej emisji w przypadku wprowadzenia podatku „metanowego”. Stwierdzono, że w zależności od scenariusza cenowego (4,07-30 euro Mg-1 CO2eq) koszty emisji metanu z produkcji zwierzęcej bardzo różnią się od siebie i mogą osiągnąć nawet ponad 190 mln euro rocznie w skali Polski. Porównując wielkość emisji metanu z produkcji tuczników (0,35 mln Mg/rok) z emisją z hodowli krów (6,348 mln Mg/rok) widać ogromną dysproporcję tych wartości. Emisja metanu z produkcji tuczników jest bowiem ponad 18 razy niższa.
    Źródło:
    Journal of Research and Applications in Agricultural Engineering; 2013, 58, 2; 25-28
    1642-686X
    2719-423X
    Pojawia się w:
    Journal of Research and Applications in Agricultural Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Weighting of new starch-polymer salted mud with PT-23 polymer
    Autorzy:
    Wysocki, S.
    Bielewicz, D.
    Wysocka, M.
    Lewicki, D.
    Wilaszek, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/298703.pdf
    Data publikacji:
    2014
    Wydawca:
    Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
    Tematy:
    drilling muds
    weighting materials
    starch mud
    Opis:
    Rheological properties of mud should assure high rate of penetration and supply maximal hydraulic power to the hole bottom. From this point of view drilling mud should have as little density and viscosity as possible and also minimal solid phase fraction. By the reason of the hole depth and geological conditions in the region it often occurs that maintenance of low density is impossible and drilling mud have to be treated with weighting materials. The process may cause change of mud rheological parameters and cause decrease of penetration rate. In case of weighted mud there is also a problem consisting in sedimentation of weighting material. During these project realization there was developed recipe of new mud for well completion with new PT-23 polymer. The next step was testing of possibilities of weighting the mud with different weighting materials: barite with grain size lower than 75 um, barite with grain size lower than 25 um, commercial barite, hematite, bridging agent M-25. Barite with grain size lower than 75 um and barite with grain size lower than 25 um were conditioned in water, then wet separated into fractions.
    Źródło:
    AGH Drilling, Oil, Gas; 2014, 31, 1; 157-165
    2299-4157
    2300-7052
    Pojawia się w:
    AGH Drilling, Oil, Gas
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Sensorless five-phase induction motor drive with third harmonic injection and inverter output filter
    Autorzy:
    Strankowski, P.
    Guzinski, J.
    Morawiec, M.
    Lewicki, A.
    Wilczynski, F.
    Powiązania:
    https://bibliotekanauki.pl/articles/200259.pdf
    Data publikacji:
    2020
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    sensorless control
    five-phase induction motor
    inverter output filter
    multiscalar control
    Opis:
    The paper presents a sensorless control approach for a five-phase induction motor drive with third harmonic injection and inverter output filter. In the case of the third harmonic injection being utilised in the control, the physical machine has to be divided into two virtual machines that are controlled separately and independently. The control system structure is presented in conjunction with speed and rotor flux observers that are required for a speed sensorless implementation of the drive. The last section is dedicated to experimental results of the drive system in sensorless operation, and the uninterrupted drive operation for two open-phase faults.
    Źródło:
    Bulletin of the Polish Academy of Sciences. Technical Sciences; 2020, 68, 3; 437-445
    0239-7528
    Pojawia się w:
    Bulletin of the Polish Academy of Sciences. Technical Sciences
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Sensorless field oriented control for five-phase induction motors with third harmonic injection and fault insensitive feature
    Autorzy:
    Wilczyński, Filip
    Strankowski, P.
    Guziński, J.
    Morawiec, M.
    Lewicki, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/200614.pdf
    Data publikacji:
    2019
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    fault tolerant control
    field oriented control
    five-phase induction machine
    speed observer
    third harmonic flux injection
    kontrola tolerancji błędu
    pięciofazowa maszyna indukcyjna
    obserwator prędkości
    Opis:
    The paper presents a solution for sensorless field oriented control (FOC) system for five-phase induction motors with improved rotor flux pattern. In order to obtain the advantages of a third harmonic injection with a quasi-trapezoidal flux shape, two vector models, α1–β1 and α3–β3, were transformed into d1– q1, d3– q3 rotating frames, which correlate to the 1st and 3rd harmonic plane respectively. A linearization approach of the dual machine model in d – q coordinate frames is proposed by introducing a new additional variable “x” which is proportional to the electromagnetic torque. By applying the static feedback control law, a dual mathematical model of the five-phase induction motor was linearized to synthesize a control system in which the electromagnetic torque and the rotor flux can be independently controlled. The results shows the air gap flux shape in steady as well transient states under various load conditions. Moreover, the implemented control structure acquires fault tolerant properties and leads to possible emergency running with limited operation capabilities. The fault-tolerant capability of the analyzed machine was guaranteed by a special implemented control system with a dedicated speed observer, which is insensitive to open-phase fault situation. The experimental tests have been performed with single and double-open stator phase fault. A torque measurement was implemented to present the mechanical characteristics under healthy and faulty conditions of the drive system.
    Źródło:
    Bulletin of the Polish Academy of Sciences. Technical Sciences; 2019, 67, 2; 253-262
    0239-7528
    Pojawia się w:
    Bulletin of the Polish Academy of Sciences. Technical Sciences
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Prevalence of neoplasms in patients with acromegaly – the need for a national registry
    Autorzy:
    Matyjaszek-Matuszek, B.
    Obel, E.
    Lewicki, M.
    Kowalczyk-Bołtuć, J.
    Smoleń, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/2081765.pdf
    Data publikacji:
    2018
    Wydawca:
    Instytut Medycyny Wsi
    Tematy:
    cancer
    acromegaly
    registry
    IGF-1
    GH
    neoplasms
    Opis:
    Introduction. Acromegaly is an endocrine disorder caused predominantly by pituitary adenoma leading to autonomic oversecretion of growth hormone and secondary elevation of insulin-like growth factor 1 (IGF-1). Consequently, there are both theoretical and experimental grounds for establishing a correlation between this disorder and the higher incidence of neoplasms. Objective. The aim of the study is to evaluate the incidence and types of neoplasms among patients with acromegaly. Materials and method. The study included 67 patients with acromegaly, aged between 24 and 75±18.8 years, 46 women (68.7%) and 21 men (31.3%), BMI: 30.7±5.7 kg/m2, age at diagnosis 49.1±12.5 years, with the medians of GH and IGF-1 levels at diagnosis of 11.3 ng/ml and 663.8 ng/ml, respectively. A retrospective analysis of medical records with particular regard to physical examination, medical history, laboratory and imaging tests was performed. Results. Fifty-one patients (76.1%) suffered from at least one neoplasm, among whom 48 patients (71.6%) had benign proliferations, whereas malignant neoplasms (larynx, endometrial and colon cancers) were found in only three patients (4.5%). Conclusions. Benign neoplasms were found in majority of patients with acromegaly (71.6%) most notably: nodular goiter and colon polyps; malignant lesions were rare (4.5%). Only every fifth patient suffered from no neoplastic proliferations. No correlations between the studied parameters and the incidence of neoplasms were found, most likely due to the small number of patients. This is the reason for proposing the creating of the first national register of incidences of neoplasms among acromegalic patients.
    Źródło:
    Annals of Agricultural and Environmental Medicine; 2018, 25, 3; 559-561
    1232-1966
    Pojawia się w:
    Annals of Agricultural and Environmental Medicine
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Dynamics of methane fermentation process and retention time for different agricultural substrates
    Autorzy:
    Lewicki, A.
    Dach, J.
    Janczak, D.
    Czekała, W.
    Rodríguez Carmona, P. C.
    Powiązania:
    https://bibliotekanauki.pl/articles/335195.pdf
    Data publikacji:
    2013
    Wydawca:
    Sieć Badawcza Łukasiewicz - Przemysłowy Instytut Maszyn Rolniczych
    Tematy:
    biogas plants
    agricultural substrates
    methane fermentation process
    retention time
    experimentation
    Polska
    Opis:
    A hydraulic retention time (retention) also known as HRT is one of the most important parameter in biogas plant exploitation. In practice, there are many substrates with different HRT used in agricultural biogas plant which makes difficulties in fermentation process optimization. The aim of this study was to investigate and compare the efficiency of biomethane production and to determine the dynamics of the fermentation process expressed by reaching 60, 80, 90 and 100% of HRT. The results showed very big differences in efficiency of methane production as well as HRT duration between analyzed substrates. The total fermentation period (100% of HRT) for investigated substrates amounted average 31,5 day (range: 21-41 days). However production of last 10% of methane average out 28%. It proves very low dynamics of fermentation process in the last phase.
    Źródło:
    Journal of Research and Applications in Agricultural Engineering; 2013, 58, 2; 98-102
    1642-686X
    2719-423X
    Pojawia się w:
    Journal of Research and Applications in Agricultural Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    In vivo inhibitory effect of Aloe vera gel on the ability of mouse parental splenic lymphocytes to induce cutaneous angiogenesis in recipient F1 mice
    Autorzy:
    Skopinski, P.
    Lewicki, S.
    Balan, B.J.
    Kocik, J.
    Zdanowski, R.
    Skopinska-Rozewska, E.
    Siwicki, A.K.
    Powiązania:
    https://bibliotekanauki.pl/articles/30546.pdf
    Data publikacji:
    2014
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Opis:
    Lymphocyte-induced angiogenesis test (LIA) is a model of local graft-versus-host (GVH) reaction, marker of the earliest events resulting from activation of donor lymphocytes after contact with host semi-allogeneic histocompatibility antigens. The effect of in vivo oral administration of Aloe vera gel for 21 days to maternal strain (Balb/c) donor mice on the ability of their splenic lymphocytes to induce cutaneous angiogenesis (LIA test) in F1 Balb/c x C3H recipients, was studied. Results: Neovascular reaction evaluated 72 hours after cells grafting was significantly lower in F1 mice grafted with lymphocytes collected from Aloe- fed donors, than in recipients of lymphocytes collected from respective controls. Conclusions: This observation opens the promise of safe and ethically acceptable possibility of use of Aloe vera gel in human donors in prevention of GVHD in recipients of bone marrow grafts.
    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:
    In vivo immuno - and angiomodulatory effects of Aloe arborescens folii recentis extractum siccum (AAES) in mice
    Autorzy:
    Zdanowski, R.
    Bałan, B.J.
    Schonknecht, K.
    Skopiński, P.
    Stelmasiak, M.
    Skopińska-Różewska, E.
    Lewicki, S.
    Powiązania:
    https://bibliotekanauki.pl/articles/2049078.pdf
    Data publikacji:
    2020
    Wydawca:
    Instytut Włókien Naturalnych i Roślin Zielarskich
    Tematy:
    Aloe arborescens
    herbal medicinal product
    Biostymina preparation
    Phytopharm Kleka
    water extract
    antibody response
    angiogenesis
    mice
    mouse
    wyciąg wodny z Aloe arborescens
    myszy
    splenocyty
    angiogeneza (test LIA)
    proliferacja komórek (PHA)
    produkcja przeciwciał
    Opis:
    Introduction: AAES is a powdered form of Biostymina, herbal medicinal product of Phytopharm Klęka S.A., a water extract of Aloe arborescens Mill. leaves. Aloe arborescens Mill. (woody aloe, tree-like aloe) is known to have several traditional medicinal properties including anti-inflammatory, immunomodulatory, antiviral and antimicrobial activity. Objective: The aim of this work was to study the in vivo effect of AAES on cellular (leukocyte-induced cutaneous angiogenesis, LIA test, and proliferative response to PHA) and humoral (anti-SRBC antibody response)immunity in mice. Methods: Balb/c mice were fed AAES from 0.5 to 75 mg/kg body mass for seven days before grafting their splenocytes intradermally to F1 (Balb/cxC3H) recipients (LIA test). Neovascular reaction was evaluated 72 h later in dissection microscope. Spleen cell cultures were incubated with 0.5, 1 and 2 µg/ml of PHA. After 48 h of incubation, tritiated thymidine was added. After further 24 h, cells were harvested (Skatron) and incorporation of tritiated thymidine was measured using Beta-scintillation counter. Balb/c mice were fed for 7 days with AAES, then immunized intraperitoneally with 5% SRBC suspension and 7 days later the antibody response was measured with hemagglutination test. Results: Neovascular reaction was significantly higher in groups grafted with splenocytes collected from all AAES fed donors than from the controls. The proliferation of splenocytes taken from mice fed AAES at doses ranging from 0.5 mg/kg to 7.5 mg/kg was stimulated in all cultures. Suppression of proliferation was observed in cell cultures derived from mice fed with higher doses of AAES. Stimulation of anti-SRBC antibody production was seen in mice fed both 2.5 and 7.5 mg/kg dose of AAES. Conclusion: Powdered form of Biostymina (AAES) might be useful in the treatment of patients with ischaemia of tissues and organs (myocardial infarction, stroke, necrosis) and in deficiency in the production of immune cells and growth factors (infections, chronic wound healing, ulceration and bone fusion).
    Źródło:
    Herba Polonica; 2020, 66, 3; 13-23
    0018-0599
    Pojawia się w:
    Herba Polonica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Morphometric abnormalities in the spleen of the progeny of mice fed epigallocatechin during gestation and nursing
    Autorzy:
    Balan, B.J.
    Skopinska-Rozewska, E.
    Skopinski, P.
    Zdanowski, R.
    Lesniak, M.
    Kiepura, A.
    Lewicki, S.
    Powiązania:
    https://bibliotekanauki.pl/articles/31390.pdf
    Data publikacji:
    2017
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Opis:
    It is very difficult to cure pregnant females suffering from infections, because of the risk which might occur during treatment by several, even herbal, medications. Many of these substances, among them extracts from plants, have antimicrobial, anti-inflammatory and immunostimulatory properties owing to their polyphenols content, but also may reveal unwanted effects on the fetal development because of their anti-angiogenic properties. The aim of the present study was to elucidate whether daily feeding pregnant and nursing mice 0.2 mg/kg epigallocatechin (EGC), previously recognized as angiogenesis inhibitor, may lead to abnormalities in morphology of spleen and in some parameters of immune function of their adult, 6-week old progeny. Morphometry of EGC offspring spleens revealed lower number of lymphatic nodules and their larger diameter than those found in the control offspring. Cellularity of spleens was lower in EGC offspring than in the controls. Cytometric analysis showed that this decline concerns lymphocytes with CD335 (p<0.001), CD19 (p<0.01) and CD4 (p<0.05) markers. No differences were observed in the humoral response to the immunization with SRBC, and in the proliferative response of splenocytes to mitogens PHA, ConA and LPS.
    Źródło:
    Polish Journal of Veterinary Sciences; 2017, 20, 1
    1505-1773
    Pojawia się w:
    Polish Journal of Veterinary Sciences
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Hydrogen and methane production from whey
    Wodór i metan produkowany z serwatki
    Autorzy:
    Kozłowski, K.
    Dach, J.
    Lewicki, A.
    Cieślik, M.
    Czekała, W.
    Janczak, D.
    Smurzyńska, A.
    Rodríguez Carmona, P. C.
    Powiązania:
    https://bibliotekanauki.pl/articles/336367.pdf
    Data publikacji:
    2016
    Wydawca:
    Sieć Badawcza Łukasiewicz - Przemysłowy Instytut Maszyn Rolniczych
    Tematy:
    power engineering
    biohydrogen
    hydrogen production
    biogas
    methane
    energetyka
    biowodór
    produkcja wodoru
    biogaz
    metan
    Opis:
    Decreasing amount of fossil fuels in the world encourages the searching of alternative energy sources. In this time of energetic crisis, the production of hydrogen is an interesting solution. Hydrogen does not produce any contaminating emission. The aim of this study was to build a project installation that produces gas biofuels and define the potential biohydrogen and biogas possible to produce from the waste of a dairy plant. The calculations assume a production of 400 m3 per day of whey permeate from the dairy plant. The methane fermentation process was carried out according to the modified German standard DIN 38 414/S8 in the eco-technology laboratory in the Poznan University of Life Sciences. The results revealed that, with the assumed quantity of available substrate, it is possible to generate 1 570 960 m3 of hydrogen per year and 4 749 469 m3 of biogas with a methane percentage of approx. 49%. Based on these results it could be possible to build a biogas plant of an estimated power of 0,99 MW of electricity and 1,12 MW of heat, as well as the hydrogen fuel cell power of 0,32 MW of electricity.
    Kończące się zasoby paliw kopalnych skutkują sytuacją, w której świat staje w obliczu konieczności poszukiwania nowych, alternatywnych źródeł energii. W czasach kryzysu energetycznego interesującym rozwiązaniem wydaje się być produkcja i wykorzystanie wodoru, który zarówno w wyniku spalenia, jak i wykorzystania w ogniwie paliwowym nie emituje zanieczyszczeń środowiska. Celem pracy było określenie możliwych do wyprodukowania ilości biowodoru oraz biogazu z mleczarskiego odpadu poprodukcyjnego. W obliczeniach uwzględniono umiejscowienie instalacji przy zakładzie mleczarskim produkującym dziennie 400 m3 permeatu serwatkowego. Wykorzystano ponadto wyniki badań przeprowadzonych w Pracowni Ekotechnologii w Poznaniu uzyskane na podstawie analiz wykonanych zgodnie z obowiązującą niemiecką normą DIN 38 414/S8. Na potrzeby obliczeń posłużono się także danymi zamieszczonymi w najnowszej literaturze przedmiotu. Na postawie uzyskanych wyników wykazano, że z zakładanej ilości dostępnego substratu możliwe będzie wytworzenie rocznie 1 570 960 m3 wodoru oraz 4 749 469 m3 biogazu o procentowej zawartości metanu ok. 49%. W oparciu o te dane obliczono realną moc biogazowni na poziomie 0,99 MW energii elektrycznej oraz 1,12 MW ciepła, a także moc ogniwa paliwowego wynoszącą 0,32 MW energii elektrycznej.
    Źródło:
    Journal of Research and Applications in Agricultural Engineering; 2016, 61, 2; 44-49
    1642-686X
    2719-423X
    Pojawia się w:
    Journal of Research and Applications in Agricultural Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Morphometric abnormalities in spleen and kidney of the progeny of mice fed American cranberry extract (Vaccinium macrocarpon) during pregnancy and lactation
    Autorzy:
    Balan, B.J.
    Lewicki, S.
    Siwicki, A.K.
    Stelmasiak, M.
    Skopinski, P.
    Skopinska-Rozewska, E.
    Wasiutynski, A.
    Zdanowski, R.
    Powiązania:
    https://bibliotekanauki.pl/articles/30729.pdf
    Data publikacji:
    2017
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Opis:
    Cranberries and cranberry-derived diet supplements are often recommended for the treatment of urinary tract infections, also during pregnancy. These products contain strongly anti-angiogenic chemical compounds which could not be indifferent to the developing fetus. In the present work we evaluated the effect of feeding pregnant and lactating mice American cranberry extract (daily dose 0.88 mg) on the morphology and some parameters of spleen and kidney function of their adult progeny. Six weeks after delivery the morphometry of spleen and kidney, cytometric analysis of spleen lymphocytes, evaluation of humoral response to SRBC (Sheep Red Blood Cells), and examination of serum creatinine/urea concentration, were performed in the offspring. Spleens of progeny from experimental (E) group differed from the spleens of progeny of control mice in the lower number of lymphatic nodules and their larger diameter. Cytometry of spleen cells from progeny of E mothers revealed more CD19⁺ and CD8⁺ lymphocytes than in the control group. No difference was seen in the response to immunization by red blood cells of sheep (SRBC) between control and E offspring. An increase in the diameter of glomeruli was observed in the kidneys of the experimental group in comparison with the control group. No abnormalities in creatinine and urea serum level were observed. A higher concentration of VEGF and bFGF in E offspring sera in comparison to the controls was seen. Conclusion: Although the observed differences between the control and experimental group were not large, caution is recommended in using cranberries and their extracts during pregnancy until more research will be done on this topic.
    Źródło:
    Polish Journal of Veterinary Sciences; 2017, 20, 1
    1505-1773
    Pojawia się w:
    Polish Journal of Veterinary Sciences
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Spleen content of selected polyphenols, splenocytes morphology and function in mice fed Rhodiola kirilowii extracts during pregnancy and lactation
    Autorzy:
    Lewicki, S.
    Stankiewicz, W.
    Skopinska-Rozewska, E.
    Wilczak, J.
    Lesniak, M.
    Suska, M.
    Siwicki, A.K.
    Skopinski, P.
    Zdanowski, R.
    Powiązania:
    https://bibliotekanauki.pl/articles/31572.pdf
    Data publikacji:
    2015
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Opis:
    The genus Rhodiola (Crassulaceae) consists of many species, growing mainly in Asia and traditionally used as adaptogens and anti-inflammatory drugs. In order to elaborate herbal immunostimulator which could be safely given to pregnant women, we performed a study on immunotropic effects of feeding pregnant and lactating mice Rhodiola kirilowii extracts. This paper presents the results of the first part of our study – spleen content of selected polyphenols, spleen cellularity, splenocytes phenotype and their response to mitogens. Experiments were performed on adult inbred females of Balb/c strain, mated with adult males. Females, since copulatory plug was noted, up to the 28-th day after delivery were fed daily with 20 mg/kg b.m. water (RKW) or hydro- lcoholic (RKW-A) extracts of Rhodiola kirilowii. Results: 1. Significantly lower proportion of pregnant mice in experimental groups than in the control. 2. Cellularity of spleen and flavonol quercetin spleen concentration were significantly lower in experimental groups in comparison to the controls. 3. Flavanols ( (+)-catechin and epicatechin) levels were significantly higher in the spleens of experimental mice than in the controls. 4. Positive correlation between spleen cellularity and quercetin, and negative correlation between spleen cellularity and epicatechin content were observed. 5. Spleen mass and spleen lymphocytes phenotype and proliferation in RKW and RKW-A fed mice did not differ from the control. These results, together with suspicion of some embryo- oxicity, are worrying and eliminate the possibility of use Rhodiola kirilowii extracts for long-term treatment in pregnant females.
    Źródło:
    Polish Journal of Veterinary Sciences; 2015, 18, 4
    1505-1773
    Pojawia się w:
    Polish Journal of Veterinary Sciences
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
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