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Tytuł:
Analiza kannabinoli i opiatów za pomocą TLC
Determination of opiates and cannabinols by TLC
Autorzy:
Błądek, J.
Polak, P.
Jarzyna, E.
Jakubowska, I.
Powiązania:
https://bibliotekanauki.pl/articles/209636.pdf
Data publikacji:
2007
Wydawca:
Wojskowa Akademia Techniczna im. Jarosława Dąbrowskiego
Tematy:
kannabinole
opiaty
chromatografia cienkowarstwowa
skrining labolatoryjny
cannabinols
opiates
thin layer chromatography
laboratory screening
Opis:
Przedstawiono wyniki badań nad zastosowaniem instrumentalnej chromatografii cienkowarstwowej do analizy opiatów i kannabinoli. Sprecyzowano zasady rozdziału składników zawartych w ekstraktach konopi i preparatach opiatów oraz zasady identyfikacji i oznaczeń zawartych w nich substancji psychotropowych. Oszacowano oznaczalność graniczną i błędy metody. Zaproponowane rozwiązania analityczne zweryfikowano podczas analizy handlowych próbek opiatów oraz pomiarów poziomu ∆⁹-tetrahydrokannabinolu w suszu konopi. The paper contains the results of investigation on application of thin layer chromatography (TLC) for-determined
The paper contains the results of investigation on application of thin layer chromatography (TLC) for determination of opiates and cannabinols. The rules of separation of components contained in extracts of Cannabis and the preparations of opiates were specified. The rules of identification and marks of contains in them psychotropic substances were also specified. Detection limit and errors of the method were estimated. Propose analytical solutions were verified during an analysis of commercial samples of opiates and measurements of contents ∆⁹-THC in Cannabis.
Źródło:
Biuletyn Wojskowej Akademii Technicznej; 2007, 56, 3; 257-267
1234-5865
Pojawia się w:
Biuletyn Wojskowej Akademii Technicznej
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Analiza możliwości odzyskiwania i magazynowania ciepła z instalacji chłodniczej tunelu
Analysis of possibilities of recovering and storing heat from cooling installation of the tunnel freezer
Autorzy:
Rudy, S.
Kozak, P.
Krzykowski, A.
Dziki, D.
Polak, R.
Wójcik, J.
Powiązania:
https://bibliotekanauki.pl/articles/93455.pdf
Data publikacji:
2014
Wydawca:
Polskie Towarzystwo Inżynierii Rolniczej
Tematy:
odzysk ciepła
instalacja chłodnicza
tunel zamrażalniczy
ciepło odpadowe
heat recovery
cooling installation
tunnel freezer
waste heat
Opis:
W pracy przeprowadzono analizę możliwości odzyskiwania i magazynowania energii cieplnej z instalacji chłodniczej fluidyzacyjnego tunelu zamrażalniczego a następnie jej magazynowania. Do odzysku ciepła wykorzystano płytowy wymiennik ciepła umieszczony za sekcją sprężarek a podgrzana woda opuszczająca wymiennik przekazywała ciepło poprzez wężownicę do zasobnika ciepła. Wyznaczono ilość ciepła możliwego do odzyskania z instalacji chłodniczej w zależności od obciążenia tunelu chłodniczego i zmiany temperatury wody w zasobniku w trakcie trwania procesu.
The paper presents the analysis of possibilities of recovering and storing thermal energy from a cooling installation of the fluidization tunnel freezer and then its storing. A plate heat exchanger placed behind a section of compressors was used for heat recovery and the heated water that leaves the exchanger transferred heat through a pipe coil to the heat dispenser. The amount of heat possible to be recovered from cooling installation in relation to burdening of the cooling tunnel and the change of water temperature in a dispenser during the process was determined.
Źródło:
Agricultural Engineering; 2014, 18, 1; 197-208
2083-1587
Pojawia się w:
Agricultural Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Analysis of the Forming Process of Energy-Absorbing Elements made from 7000 Series High-Strength Aluminum Alloy
Autorzy:
Jaśkiewicz, K.
Skwarski, M.
Polak, S.
Gronostajski, Z.
Krawczyk, J.
Kaczyński, P.
Chorzępa, W.
Powiązania:
https://bibliotekanauki.pl/articles/355556.pdf
Data publikacji:
2020
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
aluminum alloys
hot forming
Opis:
The paper covers the research on the process of solutionizing of 7075 aluminum alloy in cold tools during the stamping of a high-strength structural element (B-pillar’s base). For technological reasons, in order to obtain high strength parameters of the 7075 alloy, it is necessary to carry out a solutionization process, which allows to obtain dispersion strengthening during ageing process. Properly performed heat treatment of the alloy increases the strength of the material to approx. 600 MPa. The combination of the process of solutionization with simultaneous shaping is aimed at improving and simplifying technological operations of aluminum alloy stamping, shortening the duration of the manufacturing process and reducing production costs. The manufactured lower part of the B-pillar will be used for the verification of the validity of the developed method. During the experiment, a series of stamping tests were carried out, in which the lubricants, pressure and position of the upper and lower blankholders were the variables. The obtained results allow to estimate the influence of the cooling conditions on the strength of the drawpieces obtained after the process of artificial ageing. In order to verify and analyse the results more quickly, a numerical simulation was carried out.
Źródło:
Archives of Metallurgy and Materials; 2020, 65, 2; 697-705
1733-3490
Pojawia się w:
Archives of Metallurgy and Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Aspects of safe operation of lithium-based batteries in marine applications
Aspekty bezpiecznej eksploatacji baterii litowych w zastosowaniach morskich
Autorzy:
Polak, A.
Grzeczka, G.
Swoboda, P.
Bakiera, P.
Powiązania:
https://bibliotekanauki.pl/articles/222540.pdf
Data publikacji:
2016
Wydawca:
Akademia Marynarki Wojennej. Wydział Dowodzenia i Operacji Morskich
Tematy:
lithium-based batteries
safety
power supply in marine application
akumulatory litowe
bezpieczeństwo
źródła zasilania dla jednostek pływających
Opis:
The paper presents issues related to the operational safety of lithium-based batteries on vessels. In the first part of the paper the regulations of the Polish Register of Shipping (PRS), regarding the requirements for the batteries on a vessel are analysed. The next section presents the risks related to the use of lithium-based electric energy storage technology. The last part discusses the principles to be adopted during operation of lithium batteries to minimize the risk of threats.
W artykule przedstawiono zagadnienia związane z bezpieczeństwem eksploatacji akumulatorów litowych na jednostkach pływających. W pierwszej części dokonano analizy przepisów PRS dotyczących wymagań w stosunku do akumulatorów stosowanych w okrętownictwie. W drugiej przedstawiono zagrożenia wynikające z zastosowania technologii magazynowania energii elektrycznej opartej na ogniwach litowych. Ostatnia część omawia zasady, jakie należałoby przyjąć podczas eksploatacji baterii litowych, aby zminimalizować ryzyko wystąpienia zagrożeń.
Źródło:
Zeszyty Naukowe Akademii Marynarki Wojennej; 2016, R. 57 nr 4 (207), 4 (207); 75-85
0860-889X
Pojawia się w:
Zeszyty Naukowe Akademii Marynarki Wojennej
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Awifauna doliny Belnianki pod Daleszycami [woj.Swietokrzyskie] w okresie zimowania i przelotow w latach 1995-1996
Autorzy:
Wilniewczyc, P.
Polak, M.
Powiązania:
https://bibliotekanauki.pl/articles/32795.pdf
Data publikacji:
2002
Wydawca:
Mazowiecko-Świętokrzyskie Towarzystwo Ornitologiczne
Tematy:
awifauna
ptaki
Daleszyce
zimowanie zwierzat
przeloty ptakow
dolina Belnianki
Źródło:
Kulon; 2002, 07, 1-2; 41-72
1427-3098
Pojawia się w:
Kulon
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Bariery w dystrybucji środków unijnych a mechanizmy systemowe w (schyłkowym) państwie bezpieczeństwa socjalnego. Przypadek Polski
Barriers to the Process of Awarding and Implementation of EU Funds and Systemic Mechanisms in the Late Welfare State. The Case of Poland
Autorzy:
Bukowski, A.
Gadowska, K.
Polak, P.
Powiązania:
https://bibliotekanauki.pl/articles/2138858.pdf
Data publikacji:
2008
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
European integration
EU funds
systems theory
Niklas Luhmann
corruption
administration
bureaucracy
political system
integracja europejska
fundusze unijne
administracja
korupcja
patologie sfery publicznej
biurokratyzacja
upolitycznienie
etyka urzędnicza
prawo
system
Opis:
The article deals with the issue of structural and cohesion funding by the European Union in Poland. Although all funds earmarked for the first programming period 2004-2006 were allocated, the process posed certain problems. Therefore, in our paper we point to the weaknesses of the system and some of the hindrances to efficient fund allocation: faulty institutional and legal framework, bureaucracy, corruption and personnel deficits. We base our findings on a research incorporating 150 in-depth interviews carried out in four regions of Poland. Referring to Niklas Luhmann's theory of autopoietic systems, we present a sketch of an unevenly differentiated political system, in which administration and politics prevail over the underprivileged public, incapable of counteracting trends of politicization and bureaucratization. By showing the evolution and reproduction of the system, we relate to its deficits and their impact on the future use of the EU funds inflow.
Wraz z akcesją Polski do Unii Europejskiej w 2004 do kraju zaczął płynąć szeroki strumień dofinansowania. Pieniądze przeznaczone są na restrukturyzację i modernizację gospodarki, wyrównywanie szans słabiej rozwiniętych regionów i ułatwienie integracji ze Wspólnotą. Mimo alokacji wszystkich środków przewidzianych na lata 2004–2006, proces ten utrudniany był przez liczne przeszkody. W artykule przedstawiamy najważniejsze z nich – nadmierną biurokrację, zbyt skomplikowane i niestabilne prawo, barierę ludzką przejawiającą się m.in. w brakach kadrowych i niedostatkach kapitału społecznego oraz naciski polityczne i upolitycznienie, jakiemu poddawane są działania w procesie selekcji projektów. W naszej analizie uwzględnimy trudności, jakie napotykają zarówno prywatni i publiczni beneficjenci funduszy, jak i urzędnicy administracji publicznej zajmujący się ich rozdziałem, rozliczaniem, kontrolą i monitoringiem. W artykule nawiązujemy do koncepcji systemu autopojetycznego autorstwa Niklasa Luhmanna. Zwracamy uwagę na nierównomierne różnicowanie administracji, polityki i publiczności na kluczowym dla rozdziału funduszy poziomie regionalnym, a także na słabość czynnika społecznego, mającego z zasady stanowić przeciwwagę dla biurokratyzujących i polityzujących tendencji, z jakimi boryka się analizowany proces. Opisujemy reprodukcję i ewolucję systemu, odnosząc się do wykorzystywania środków przyznanych Polsce na lata 2004–2006, a także do fazy przygotowawczej do okresu programowania 2007–2013. Tekst oparty jest na wynikach jakościowych badań terenowych przeprowadzonych przez zespół pod kierownictwem Grażyny Skąpskiej w gminach południowej Polski, które skonfrontowane zostały z danymi statystycznymi oraz wynikami kontroli NIK.
Źródło:
Studia Socjologiczne; 2008, 1(188); 5-43
0039-3371
Pojawia się w:
Studia Socjologiczne
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Bone losses in obese, ovariectomized rats appear to be independent from sclerostin-induced inhibition of the Wnt/β-catenin pathway
Autorzy:
Radzki, R.P.
Bieńko, M.
Filip, R.
Polak, P.
Michalik Wolska, J.
Powiązania:
https://bibliotekanauki.pl/articles/2085877.pdf
Data publikacji:
2020
Wydawca:
Instytut Medycyny Wsi
Tematy:
dietary induced obesity
bone
sclerostin
pQCT
DXA
rats
ovariectomy
Opis:
Introduction. Overweight and obesity, as well as a gonadal function, are pivotal factors influencing bone tissue metabolism. Materials and method. The aim of the study was to determine the effect of dietary induced obesity (DIO) on bone tissue metabolism in sham-operated (SHO) or ovariectomized (OVX) adult female Wistar rats. Additionally, the influence of DIO in SHO or OVX on the concentration of sclerostin in the blood serum was analyzed. After SHO or OVX, the rats were placed in groups (n=8) and either received a standard diet (11.5 MJ/kg) (SHO-CON; OVX-CON) or a high-energy diet (17.6 MJ/kg) (SHO-FAT; OVX-FAT). The experiment lasted for 90 days and allowed for the establishment of osteopenia in OVX females and obesity in the rats that had received the high-energy diet. Results. The results of the study demonstrate that obesity or/and ovariectomy increases the resorption of femora and tibiae, hence decreasing the densitometric and mechanical parameters affecting the bone structure in adult females rats. The strongest osteodegenerative effect was seen in the OVX-FAT females. Interestingly, the degree of bone tissue degradation caused exclusively by ovariectomy was similar to that found in the obese sham-operated rats. Conclusions. Bone losses invoked by DIO seem to be independent from the Wnt/β-catenin pathway inhibition induced by sclerostin. While further study is necessary, the obtained results suggest that the usage of sclerostin anti-body in the treatment of osteoporosis can be ineffective, and in obese patients the undertaking of such therapy should be reassessed.
Źródło:
Annals of Agricultural and Environmental Medicine; 2020, 27, 3; 394-400
1232-1966
Pojawia się w:
Annals of Agricultural and Environmental Medicine
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Bovine neonatal pancytopenia in calves in Poland
Autorzy:
Jaskowski, J.M.
Polak, M.P.
Marszalek, A.
Nowak, K.
Frackowiak, H.
Olechnowicz, J.
Powiązania:
https://bibliotekanauki.pl/articles/30613.pdf
Data publikacji:
2012
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
bovine neonatal pancytopenia
calf
symptom
bleeding
diathesis
thrombocytopenia
ecchymosis
etiology
Polska
Opis:
Bovine neonatal pancytopenia (BNP), a newly emerged syndrome of discussed etiology in calves, has been diagnosed since 2006. Here we describe first cases of BNP in Poland. Between September 2008 and April 2011, 62 cases of BNP were diagnosed in dairy calves. Bleeding skin lesions were mostly pronounced in summer and early autumn. Severe thrombocytopenia was observed in all sick animals. All calves came from herds vaccinated against BVDV infection with PregSure BVD vaccine (Pfizer). Substitution of colostrum from dams of BNP positive calves with colostrum from dams from herds free of BNP was the only effective measure to avoid new cases in affected herds.
Źródło:
Polish Journal of Veterinary Sciences; 2012, 15, 3
1505-1773
Pojawia się w:
Polish Journal of Veterinary Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Capability assessment of measuring equipment using statistic method
Ocena możliwości urządzenia pomiarowego do korzystania z metod statystycznych
Autorzy:
Polák, P.
Drlička, R.
Žitňanský, J.
Powiązania:
https://bibliotekanauki.pl/articles/410071.pdf
Data publikacji:
2014
Wydawca:
STE GROUP
Tematy:
measuring device
index Cg and Cgk
urządzenia pomiarowe
indeks Cg i Cgk
Opis:
Capability assessment of the measurement device is one of the methods of process quality control. Only in case the measurement device is capable, the capability of the measurement and consequently production process can be assessed. This paper deals with assessment of the capability of the measuring device using indices Cg and Cgk.
Ocena możliwości urządzenia pomiarowego jest jednym ze sposobów kontroli jakości procesu. Urządzenie pomiarowe może być ocenione tylko w przypadku gdy jest w stanie wykonać pomiar i w konsekwencji ocenić sposób wytwarzania. Dokument ten dotyczy oceny możliwości urządzenia pomiarowego przy użyciu indeksów Cg i Cgk.
Źródło:
Management Systems in Production Engineering; 2014, 4 (16); 184-186
2299-0461
Pojawia się w:
Management Systems in Production Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Elektroforeza swobodna z przepływem hydrodynamicznym : podstawy teoretyczne i rozwiązania techniczne
Free flow electrophoresis : theory and technology
Autorzy:
Hoda, P.
Polak, B.
Dzido, T. H.
Powiązania:
https://bibliotekanauki.pl/articles/172756.pdf
Data publikacji:
2018
Wydawca:
Polskie Towarzystwo Chemiczne
Tematy:
elektroforeza swobodna
przepływ hydrodynamiczny
technika elektromigracyjna
rozdzielanie pseudo-dwuwymiarowe
rozdzielanie preparatywne
mikro-elektroforeza swobodna
free flow electrophoresis
electromigration technique
pseudo-two dimensional separation
preparative separation
micro free flow electrophoresis
Opis:
Free flow electrophoresis, or carrier-free electrophoresis, is a technique based upon the principle of mobility of chargeable species in the electric field. However, unlike more widespread gel electrophoresis, free flow electrophoresis does not utilise any kind of solid support medium. Instead, species to be separated move within the space filled with aqueous buffer, which is constantly pumped in the direction perpendicular to the direction of the applied electric field. Such set-up allows for continuous separation, as compounds of the sample being processed form separate bands and leave the separation system through several different outlets located along the edge of the chamber. Furthermore, the use of mild separation conditions increases the chance of biologically active compounds retaining their activity after the separation is finished. These qualities make free flow electrophoresis an excellent tool for protein research and cytology. In this review, the basic theoretical aspects of the technique are outlined, with a special emphasis placed on various modes in which free flow electrophoresis can be operated. Besides, a review of milestone papers related to free flow electrophoresis technology is presented. Apart from the devices following the original concept of Barrollier and Hannig, an insight into the construction of recirculating instrumentation, multicompartment electrolysers as well as radially-symmetric chambers is provided. A special focus is placed on patents and commercialized solutions. Finally, the challenges of scaling-down free flow electrophoresis to micro-dimensions are introduced.
Źródło:
Wiadomości Chemiczne; 2018, 72, 1-2; 39-60
0043-5104
2300-0295
Pojawia się w:
Wiadomości Chemiczne
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Energy sorrel - an alternative fuel for rural areas
Autorzy:
Polak, M.
Neuberger, P.
Sleger, V.
Powiązania:
https://bibliotekanauki.pl/articles/61420.pdf
Data publikacji:
2007
Wydawca:
Polska Akademia Nauk. Stowarzyszenie Infrastruktura i Ekologia Terenów Wiejskich PAN
Opis:
The research is focused on energy sorrel as a fuel for local low-power heating systems with output up to 100 kW. Sorrel is perennial plant surviving in its location nearly 18 years which is very good from the point of crop expenses. It is a robust plant with height of about 2 m in second year of plantation. Dry phytomass is energetically rich fuel with total heating value 17.5 – 18.0 MJ.kg-1 at the average yield of 10 tons per hectare. An experimental combustion of pure sorrel and its blends were done with boiler VERNER A25 – a hot water boiler for pellets. 11 different sorrel fuels consisting of 5 primary kinds were tested during the experiment: sorrel (Rumex tianshanicus x Rumex patientia), Phalaroides arundinacea, Canabis sativa, pine-bark, sorrel (Rumex tianshanicus x Rumex patientia), brown coal. Based on collected data it is possible to obtain an overview of these fuels and their emission properties. Satisfactory values of CO concentration are possible to gain partly by choosing appropriate combustion device and its settings and partly by mixing with other types of fuel. In the case of sorrel the combination of both has been shown very useful. It is very hard to combust sorrel only, and its testing proves unsatisfactory results. But if we combust blend of sorrel and canary grass 1:1 in the same device, the results are somewhat better. The best results can be reached if we burn this blend in more suitable device. By this way it is even possible to fulfil the emission limits. However, if we burn only pure sorrel in another burner, the emissions are very dissatisfactory again. Another possibility of how to burn sorrel effectively is to combine it with brow coal. On the basis of received results, fuel containing 10 to 20 % of coal can be recommended. From point of view of ash properties pure sorrel appears a problematic fuel. During our experiment ash accumulation in combustion chamber was observed. Unburnt fuel blocked air intakes which caused burning deterioration and increase of CO emissions. All above mentioned facts indicate that sorrel burning is possible if we fulfil all demands required for this fuel. Combustion of pure sorrel in any device without special settings means in many cases non effective use of fuel and bad emissions.
Źródło:
Infrastruktura i Ekologia Terenów Wiejskich; 2007, 3
1732-5587
Pojawia się w:
Infrastruktura i Ekologia Terenów Wiejskich
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Evaluation of long-term surgical treatment outcomes of thoraco-lumbar spinal fractures – follow-up period of over 10 years
Autorzy:
Węgłowski, R.
Polak, P.
Piech, P.
Powiązania:
https://bibliotekanauki.pl/articles/28762762.pdf
Data publikacji:
2021
Wydawca:
Instytut Medycyny Wsi
Źródło:
Annals of Agricultural and Environmental Medicine; 2021, 28, 2; 339-344
1232-1966
Pojawia się w:
Annals of Agricultural and Environmental Medicine
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Feasibility of using heat-recovery exchangers in livestock buildings at a site at a specific altitude with a specific average outdoor air temperature
Autorzy:
Sleger, V.
Neuberger, P.
Polak, M.
Powiązania:
https://bibliotekanauki.pl/articles/62353.pdf
Data publikacji:
2009
Wydawca:
Polska Akademia Nauk. Stowarzyszenie Infrastruktura i Ekologia Terenów Wiejskich PAN
Tematy:
feasibility
heat-recovery exchanger
livestock building
outdoor air temperature
climate condition
Czech Republic
agriculture
air temperature
weather station
ventilation
air exchange
heat exchanger
Opis:
The installation of an energy-saving facility must be preceded by analysis of its financial effectiveness. Among methods enabling such evaluation is the basic net profit calculation method. For this, the annual consumption of electricity for ventilation or of thermal energy for heating must be determined. The calculation formula uses the sum of energies for temperatures within the range from the calculation temperature for the area in question to the long-term average of the maximum temperature at the site, or to the temperature at which the heating power is zero. It is necessary to know the summary time of occurrence of a given temperature during a year. The site data can only be assessed based on long-term meteorological information. In fact, data used by current national standards to describe climatic conditions in the Czech Republic are from the years 1901 to 1950. The dependence of the average yearly temperature on altitude is shown in Fig. 1 for the 1961 1990 and 1991 2000 periods. It is evident that the average temperatures for the latter period are nearly 0.6 K higher than those for the former period, irrespective of the altitude. In this paper the climatic conditions are assessed based on daily data measured throughout the period from 1 January 1991 to 31 December 2000. Weather stations were selected so as to achieve a uniform coverage and continuity of measurement at each site (as far as possible). All the stations lie in the Czech Republic between 48.8° and 50.8° north latitude at altitudes from 158 m to 1324 m. It was the objective of this examination, based on the meteorological data collected to calculate the average number of days and hours during which the temperature during the year is lower than a specific limiting level, in dependence on the average yearly temperature of the site. Fig. 3 shows the average number of days in a year during which a temperature lower than a selected limiting level occurs, as calculated for the 1991 2000 period. The results are presented for 4 areas with average yearly temperatures of 6 °C 7 °C, 7 °C 8 °C, 8 °C 9 °C, and 9 °C 10 °C, respectively. The graphs enables us to ascertain the number of days during which a heating facility is in operation if the facility is activated by outdoor air temperature decrease to below a specific limiting level. If a typical daily temperature wave is considered, the method makes it possible to estimate the number of hours during which the air temperature is lower than the limiting level chosen. The difference between the data for various limiting levels allows us, for an area with a specific average yearly temperature to ascertain the time of occurrence of outdoor temperature within various ranges. The results of calculations are shown in Fig. 4 and Table 1. The method applied enables underlying data to be prepared for the assessment of energy demands for air heating at a given site and for estimation of the energy savings that could be achieved by installing economical air heating facilities in livestock buildings.
Źródło:
Infrastruktura i Ekologia Terenów Wiejskich; 2009, 07
1732-5587
Pojawia się w:
Infrastruktura i Ekologia Terenów Wiejskich
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Fruiting bodies of Hericium erinaceus (Bull.) Pers. - a new source of water-insoluble (1→3)-alfa-d-glucan
Autorzy:
Wiater, A.
Choma, A.
Komaniecka, I.
Pleszczynska, M.
Siwulski, M.
Polak, p.
Janusz, G.
Szczodrak, J.
Powiązania:
https://bibliotekanauki.pl/articles/56606.pdf
Data publikacji:
2016
Wydawca:
Polskie Towarzystwo Botaniczne
Opis:
A water-insoluble polysaccharide (WIP) was isolated from the fruiting bodies of Hericium erinaceus HE01 by an alkaline solution with the yield of 5%. Structural and compositional analyses by total acid hydrolysis, methylation analysis, FT-IR, FT-Raman, and ¹H NMR spectroscopy as well as other instrumental techniques showed predominantly glucose linked by α-glycosidic bonds and small amounts of mannose, xylose, rhamnose, galactose, and ribose. The methylation analysis showed that (1→3)-linked Glcp is the major constituent (70.8%) of the polymer, while the 3,4 substituted d-Glcp represents the main branching residue of the glucan. The presence of (1→3)-α-d-glucan in the hyphae of H. erinaceus was additionally confirmed by the use of specific fluorophore-labeled antibodies.
Źródło:
Acta Societatis Botanicorum Poloniae; 2016, 85, 3
0001-6977
2083-9480
Pojawia się w:
Acta Societatis Botanicorum Poloniae
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Heat recuperation from exhaust air in a sports hall with swimming pool
Autorzy:
Nuberger, P.
Sleger, V.
Polak, M.
Powiązania:
https://bibliotekanauki.pl/articles/60995.pdf
Data publikacji:
2007
Wydawca:
Polska Akademia Nauk. Stowarzyszenie Infrastruktura i Ekologia Terenów Wiejskich PAN
Opis:
This paper deals with the determination of several efficiency types of a cross-current recovery exchanger which is a part of the air venting system in the swimming pool hall on the premises of the Czech University of Life Sciences (CULS) in Prague. The product is a cross-current plate exchanger with a heat-exchanging surface of antirust aluminium. According to the manufacturer, the exchanger is fit for temperatures common in air ventilation systems. The air is forced in by fans at a flow quantity of 16,000 m3, maximum speed 2000 rpm, electric motor output 7.5 kW, filters for the air coming from the outside – grade G4, pressure loss from 42 to 200 Pa, filters for the air coming from the inside – grade G3, pressure loss from 46 to 200 Pa. The results presented are derived from in-process measurements taken on 31 January 2007 and 7 February 2007, from 9.15 to 11.30 on both days. Air temperature and air humidity were measured with 9636-51B-type sensors by Ahlborn, connected to the AHLBORN ALMEMO 5990-2 centre. These sensors were placed into each of the four input/output channels, very close to the exchanger itself (Fig. 2). The data measured were saved in the centre memory every minute. Figures 3, 4, 5 and 6 show the temperature and humidity curves at the exchanger inlets and outlets on measurement days as well as outside air temperature (te) and outside air relative humidity (φe) captured by the met station on the CULS premises. Table 2 shows efficiency ranges calculated according to relations (1), (3), (4), (5), and (6) for air parameters ascertained at exchanger inlets and outlets on 31 January and 7 February 2007 and the calculated flow rates (Table 1). The difference between the outside temperature te and outside humidity φe values taken by the met station and the temperature te1 and humidity φe1 values measured at the recuperator inlet can be explained as resulting from the air being drawn in from the premises affected by the building and 8-m air piping situated in the building’s interior. Heat transmission to the surrounding air occurs despite the mineral wool heat insulation applied to the air piping. The slight increase of thermal efficiency observed on 7 February 2007 resulted from throttling down the recuperator feed air inlet flaps. Reducing the heated air discharge volume (see Table 1) resulted in a greater temperature difference te2 – te1. Energetic efficiency η is lower than thermal efficiency ηt because equation 3 takes into account the effect of condensed vapours in the cooled waste air. According to the manufacturers, the efficiency of top-class exchangers exceeds 70 %. This value might suggest that almost all the air energy available in the given space is utilised. Closer examination reveals that what is presented is thermal efficiency, which is always higher than other kinds of efficiency (see Table 2). Low exergetic efficiency is a sign that there still is a potential in terms of transmission of recovered air utilised energy (exergy).
Źródło:
Infrastruktura i Ekologia Terenów Wiejskich; 2007, 3
1732-5587
Pojawia się w:
Infrastruktura i Ekologia Terenów Wiejskich
Dostawca treści:
Biblioteka Nauki
Artykuł
Wyświetlanie 1-15 z 30

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