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Tytuł:
Effect of Using Various Cathode Materials (Carbon Felt, Ni-Co, Cu-B, and Cu-Ag) on the Operation of Microbial Fuel Cell
Autorzy:
Włodarczyk, Paweł P.
Włodarczyk, Barbara
Powiązania:
https://bibliotekanauki.pl/articles/27314860.pdf
Data publikacji:
2023
Wydawca:
Uniwersytet Zielonogórski. Oficyna Wydawnicza
Tematy:
bioelectricity
microbial fuel cell
MFC
cathode materials
bioelectrochemical system
COD reduction
renewable energy sources
bioelektryczność
mikrobiologiczne ogniwo paliwowe
materiały katodowe
system bio-elektrochemiczny
redukcja ChZT
odnawialne źródła energii
Opis:
Wastewater has high potential as an energy source. Therefore, it is important to recover even the smallest part of this energy, e.g., in microbial fuel cells (MFCs). The obtained electricity production depends on the process rate of the electrodes. In MFC, the microorganisms are the catalyst of anode, and the cathode is usually made of carbon material. To increase the MFC efficiency it is necessary to search the new cathode materials. In this work, the electricity production from yeast wastewater in membrane-less microbial fuel cells with a carbon felt, Ni-Co, Cu-B, and Cu-Ag cathodes has been analyzed. In the first place, the measurements of the stationary potential of the electrodes (with Cu-Ag catalyst obtained by the electrochemical deposition technique) were performed. Next, the analysis of the electric energy production during the operation of the membrane-less microbial fuel cell (ML-MFC). The highest parameters were obtained for the Ni-Co and Cu-Ag catalysts. The cell voltage of 607 mV for Ni-Co and 605 mV for Cu-Ag was obtained. Additionally, the power of 4.29 mW for both cathodes - Ni-Co and Cu-Ag was obtained. Moreover, Ni-Co and Cu-Ag allow the shortest time of COD reduction. Based on the test results (with selected MFC design, wastewater, temperature, etc.), it can be concluded that of all the analyzed electrodes, Cu-Ag and Ni-Co electrodes have the best parameters for use as cathodes in ML-MFC. However, based on the results of this study, it can be concluded that all the tested electrodes can be used as cathode material in MFC.
Źródło:
Civil and Environmental Engineering Reports; 2023, 33, 4; 95--105
2080-5187
2450-8594
Pojawia się w:
Civil and Environmental Engineering Reports
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Evaluation of a capacity increase in AG milling of copper slag
Autorzy:
Can, N. Metin
Mercan, Orberk
Powiązania:
https://bibliotekanauki.pl/articles/27323653.pdf
Data publikacji:
2023
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
autogenous mill
copper slag
modelling
simulation
capacity
Opis:
The verification of the desired capacity increase in the grinding circuits is performed by simulation studies as they suggest accurate and fast alternatives compared to expensive and labor-intensive methods, particularly for the evaluation of situations that require investment. In this study, simulation was used to evaluate the alternatives that can be made to increase the capacity from 38.86 tph to 90 tph in a grinding circuit where copper slag is autogenously milled. The slag sample was characterized by drop weight and abrasion tests to describe the breakage in autogenous (AG) milling. The performances of the existing circuit and equipment were determined by a comprehensive sampling study, and modeling studies were carried out to form the basis of the simulations. Simulation scenarios were evaluated as investment free and investment requiring alternatives. In the investment free option changing fresh feed size distribution was examined however, capacity could be increased up to only 42 tph. In investment option, increasing the mill motor capacities was simulated and 90 tph target throughput was provided. This result was validated in the plant by replacement of mill motors of AG and pebble mill for 1000 kW and 750 kW, respectively.
Źródło:
Physicochemical Problems of Mineral Processing; 2023, 59, 6; art. no. 175181
1643-1049
2084-4735
Pojawia się w:
Physicochemical Problems of Mineral Processing
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Kinetics of simultaneous recovering of Au and Ag from CTs by chloridizing volatilization methods
Autorzy:
Weiwei, Wang
Zhengyao, Li
Shanshan, Yang
Kai, Ma
Xin, Gao
Shaoqi, Han
Shaochun, Hou
Hecheng, Miao
Powiązania:
https://bibliotekanauki.pl/articles/27323663.pdf
Data publikacji:
2023
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
cyanide tailings
chloridizing volatilization
gold
silver
kinetics
Opis:
Cyanide Tailings (CTs) are known as hazardous resources that accumulate hundreds of millions of tons, threatening the ecological environment. This work proposes an eco-friendly and efficient way to recover gold and silver from CTs. The effects of calcium chloride dosage, silicon dioxide dosage, pellet moisture content, roasting temperature, and roasting time on Au and Ag chloridizing volatilization were studied. The kinetics of simultaneously recovering of gold and silver from cyanide Tailings by chlorination roasting was investigated. It was determined that the chloridizing volatilization rates increased with increasing calcium chloride dosage, temperature and decreasing silicon dioxide dosage, pellet moisture content. The chloridizing volatilization kinetics followed a shrinking core model, with inter-diffusion through gangue layer as the rate determining step. This finding is in accordance with the apparent activation energy (Ea) of 24.01 kJ•mol-1 (Au) and 24.62 kJ•mol-1 (Ag). The orders of reaction with respect to moisture content, temperature, calcium chloride dosage and silicon dioxide dosage were also achieved. The rate of reaction based on diffusion-controlled process can be expressed by semi-empirical equations. The control steps of the gold and silver recovery process were investigated by the kinetic study, which provided theoretical guidance for the optimization of the method.
Źródło:
Physicochemical Problems of Mineral Processing; 2023, 59, 6; art. no. 172522
1643-1049
2084-4735
Pojawia się w:
Physicochemical Problems of Mineral Processing
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Research on New Al-Ag-Mo Alloys Dedicated to Wire Applications in Overhead Power Lines
Autorzy:
Grzebinoga, Justyna
Mamala, Andrzej
Ściężor, Wojciech
Kowal, Radosław
Powiązania:
https://bibliotekanauki.pl/articles/2201984.pdf
Data publikacji:
2023
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
Tematy:
aluminum
silver
molybdenum
continuous casting
drawing
wire
conductivity
thermal resistance
temperature coefficient of resistance
rheological properties
HTLS conductors
Opis:
The latest research work in the field of electric power systems focuses on the development of new wire materials which will allow the increase of the transmission capacity of power lines currently in use. The reason for this research was the often limited possibilities of continuous and failure-free transmission of electricity. In this paper, the authors present research on a new aluminium-based alloy dedicated for use as a conductive braid in the HTLS cable group. There are many technical solutions for this group of cables on the market, although they are solutions with a number of disadvantages, ranging from their high price, various operational shortcomings, complicated installation techniques, and ending with the risk of monopolistic practices, which is related to the inability to attract several competitive suppliers. The main aim of the research was to develop a new alloy based on aluminium with the addition of silver and molybdenum dedicated for use in special overhead power cables. Experimental research on new materials focused on obtaining the necessary knowledge to produce an overhead wire from these alloys with higher current carrying capacity in relation to the currently used conventional wire materials based on aluminium.
Źródło:
Journal of Casting & Materials Engineering; 2023, 7, 1; 9--14
2543-9901
Pojawia się w:
Journal of Casting & Materials Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Seed germination dynamics of some woody legumes: implication for restoration of arid zones ecosystems
Autorzy:
Buba, T.
Ezra, A.G.
Bako, S.P.
Sabo, M.U.
Powiązania:
https://bibliotekanauki.pl/articles/28825291.pdf
Data publikacji:
2023
Wydawca:
Polska Akademia Nauk. Czasopisma i Monografie PAN
Źródło:
BioTechnologia. Journal of Biotechnology Computational Biology and Bionanotechnology; 2023, 104, 4; 381-402
0860-7796
Pojawia się w:
BioTechnologia. Journal of Biotechnology Computational Biology and Bionanotechnology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The Termination of the Employment Contract of a Data Protection Officer under GDPR: Commentary on the Judgment of the Court of Justice of the European Union in Leistritz AG v LH (C-534/20)
Rozwiązanie umowy o pracę z inspektorem ochrony danych zgodnie z RODO. Glosa do wyroku Trybunału Sprawiedliwości Unii Europejskiej w sprawie Leistritz AG v LH (C-534/20)
Autorzy:
Fajgielski, Paweł
Powiązania:
https://bibliotekanauki.pl/articles/31348359.pdf
Data publikacji:
2023
Wydawca:
Uniwersytet Marii Curie-Skłodowskiej. Wydawnictwo Uniwersytetu Marii Curie-Skłodowskiej
Tematy:
data protection
data protection officer
GDPR
termination of the employment contract
ochrona danych osobowych
inspektor ochrony danych
RODO
rozwiązanie umowy o pracę
Opis:
In the judgment in question, the Court of Justice of the European Union rules that Article 38 (3) GDPR does not preclude national legislation which provides that a termination of the employment contract of a data protection officer is allowed only with just cause, even if the termination is not related to the performance of that officer’s tasks, in so far as such legislation does not undermine the achievement of the objectives of that regulation. In the approving commentary, based on the theses contained in the judgment, the reasons related to the performance of the data protection officer tasks and other reasons for the inspector’s dismissal are discussed. Doubts related to the dismissal of the data protection officer due to the reorganization of the company are also highlighted. The issue of dismissal of the data protection officer is of great practical importance, the considerations and conclusions presented in the commentary may be helpful for many controllers.
W glosowanym orzeczeniu Trybunał Sprawiedliwości Unii Europejskiej orzekł, że art. 38 ust. 3 RODO nie stoi na przeszkodzie przepisom krajowym, które stanowią, że rozwiązanie umowy o pracę z inspektorem ochrony danych jest dopuszczalne tylko z uzasadnionej przyczyny, nawet jeżeli rozwiązanie stosunku pracy nie jest związane z wykonywaniem zadań tego inspektora, o ile takie uregulowanie nie zagraża realizacji celów tego rozporządzenia. W aprobującym komentarzu, w oparciu o tezy zawarte w wyroku, omówiono przyczyny uzasadniające odwołanie inspektora ochrony danych związane z wykonywaniem przez niego zadań oraz inne przyczyny odwołania inspektora. Ponadto zwrócono uwagę na wątpliwości odnoszące się do odwołania inspektora ochrony danych z powodu reorganizacji przedsiębiorstwa. Kwestia odwołania inspektora ochrony danych ma duże znaczenie praktyczne, a przedstawione w komentarzu rozważania i wnioski mogą okazać się pomocne wielu administratorom.
Źródło:
Studia Iuridica Lublinensia; 2023, 32, 2; 335-345
1731-6375
Pojawia się w:
Studia Iuridica Lublinensia
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Thermoplastic hardened Cu-Ni-Si-Ag alloy
Autorzy:
Krupińska, Beata
Chulist, Robert
Kondracki, Marcin
Labisz, Krzysztof
Powiązania:
https://bibliotekanauki.pl/articles/2204523.pdf
Data publikacji:
2023
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
modification
structure
CuNi2Si1 alloy
thermo-plastic treatment
CuNi2Si1
stop CuNi2Si1
modyfikacja
obróbka termoplastyczna
struktura
Opis:
The paper aims to investigate the influence of silver addition on the microstructure of CuNi2Si1 alloys. The investigated copper alloy was cast and then supersaturated, plastically deformed on the Gleeble 3800 simulator and finally aged. Structural changes were examined using optical microscopy, scanning electron microscopy (SEM) and transmission electron microscopy (TEM). Orientation mapping was completed with FEI Quanta 3D field emission gun scanning electron microscope (SEM) equipped with TSL electron backscattered diffraction (EBSD) system. The effect of structural and microstructural changes on hardness and conductivity was also investigated. Based on the mechanical tests it was found that the mechanical properties and conductivity are improved due to heat and plastic treatment. It was also found that the precipitation hardening raises the hardness to the level of 40% whilst an increase in conductivity by 20% is observed.
Źródło:
Bulletin of the Polish Academy of Sciences. Technical Sciences; 2023, 71, 2; art. no. e145683
0239-7528
Pojawia się w:
Bulletin of the Polish Academy of Sciences. Technical Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Window layer based on ZnO and Ag thin films incorporated in solar cells as a part of hybrid energy-saving system
Autorzy:
Gholamzadeh, Hadi
Hosseini, Reza
Veladi, Hadi
Rahimi, Hadi
Powiązania:
https://bibliotekanauki.pl/articles/2202771.pdf
Data publikacji:
2023
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
solar cell
hybrid energy harvester
optical transmission
material
photonic multilayer
Opis:
We have started a new research project on a hybrid power generation system consisting of piezoelectric, thermoelectric and solar cell modules. In the first step, we have focused on the antireflection coating based on zinc oxide (ZnO) and metal nanolayers incorporated in solar cells. In layered structure containing ZnO and metal nanoscale layers, we have presented the possibility of increasing wave transmission in the visible region by adding the top and bottom cap layers. The enhancement of optical transmission is very important in improving the performance of sensor protections, solar cells, UV protective films and transparent conductive display panels electrode. It is found that, the structure containing both the top and bottom cap layers (S3) yields larger transmittance than the structures S1 without any cap or S2 just with one cap layer. The maximum transmittance in the visible range can be increased from 33% to 67%. In addition, for the TE mode (TM mode), the maximum value of transmission in the S1 and S2 structures occurs at angles close to normal incidence while in the S3 multilayer it happens around 1 radian, that is, the behavior of the TE mode is the opposite of the TM mode. Also, when the incident angle varies, the band edges experience a blue shift. The amount of TE shift is more pronounced than TM one. Moreover, the metal with higher plasma frequency will move the band gap edges to the higher frequencies.
Źródło:
Optica Applicata; 2023, 53, 1; 141--152
0078-5466
1899-7015
Pojawia się w:
Optica Applicata
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Changes in the ways of using plots in allotment gardens in Poland. A case of selected gardens in the Łódź Voivodship
Autorzy:
Szkup, Roman
Powiązania:
https://bibliotekanauki.pl/articles/2195872.pdf
Data publikacji:
2022-12-23
Wydawca:
Uniwersytet Gdański. Instytut Geografii
Tematy:
allotment gardens (AG)
allotment gardening
use of allotment gardens
landscaping of allotment gardens
Opis:
The The article attempts to check whether there is spatial regularity in the relationship between the model of agricultural and productive use of allotment gardens and the leisure and recreational model. The article also presents socio-demographic features of users nowadays defining the use of plots in gardens. The objectives were achieved by means of a direct inventory and a questionnaire survey conducted among users of five gardens: one located in Łódź and four located in the western part of the suburban zone of Łódź. As a result of the analysis, it was found that the farther from the center of Łódź, the less dominant the leisure and recreational model was. In addition, it was found that the users’ professional activity and age are the sociodemographic features which today determine the way of using plots in gardens.
Źródło:
Journal of Geography, Politics and Society; 2022, 12, 4; 33-41
2084-0497
2451-2249
Pojawia się w:
Journal of Geography, Politics and Society
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Improved transformation of Agrobacterium assisted by silver nanoparticle
Autorzy:
Benny, Amala
Alex, Swapny
Soni, K.B.
Anith, K.N.
Kiran, A.G.
Viji, M.M.
Powiązania:
https://bibliotekanauki.pl/articles/16648111.pdf
Data publikacji:
2022
Wydawca:
Polska Akademia Nauk. Czasopisma i Monografie PAN
Tematy:
silver nanoparticles
Agrobacterium transformation
calcium chloride
competent cells
freeze thaw
transformation efficiency
Opis:
In transgenic plant development, the low transformation efficiency of Agrobacterium with exogenous DNA is the major constraint, and hence, methods to improve its transformation efficiency are needed. Recently, nanoparticlemediated gene transfer has evolved as a key transformational tool in genetic transformation. Since silver nanoparticles (AgNPs) can induce pores on the cell membrane, their efficacy in the improvement of conventional calcium chloride freeze-thaw technique of transformation of Agrobacterium was explored in this study. Agrobacterium cells in the exponential growth phase were exposed to different concentrations of AgNPs (0.01, 1, 5, 10, and 20 mg/l), and the half-maximal effective concentration (EC50) was determined via Probit analysis using the SPSS software. Transformation efficiency of AgNPs alone and in combination with calcium chloride was compared with that of the conventional calcium chloride freeze-thaw technique. AgNPs at a concentration of 0.01 mg/l in combination with calcium chloride (20 mM) showed a ten fold increase in the transformation efficiency (3.33 log CFU (colony-forming unit/microgram of DNA) of Agrobacterium tumefaciens strain EHA 105 with plasmid vector pART27 compared with the conventional technique (2.31 log CFU/μg of DNA). This study indicates that AgNPs of size 100 nm can eliminate the freeze-thaw stage in the conventional Agrobacterium transformation technique, with a 44% improvement in efficiency. The use of AgNPs (0.01 mg/l) along with 20 mM calcium chloride was found to be an economically viable method to improve the transformation of Agrobacterium with exogenous plasmid DNA.
Źródło:
BioTechnologia. Journal of Biotechnology Computational Biology and Bionanotechnology; 2022, 103, 3; 311-317
0860-7796
Pojawia się w:
BioTechnologia. Journal of Biotechnology Computational Biology and Bionanotechnology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Investigation of Microstructure, Mechanical and Corrosion Properties of Biodegradable Mg-Ag Alloys
Autorzy:
Elen, Levent
Turen, Yunus
Ahlatci, Hayrettin
Sun, Yavuz
Unal, Mehmet
Powiązania:
https://bibliotekanauki.pl/articles/2125533.pdf
Data publikacji:
2022
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
Mg-Ag alloys
biodegradable
mechanical properties
microstructure properties
corrosion
Opis:
In this study, microstructure, mechanical, corrosion and corrosive wear properties of Mg-xAg the as-cast and extruded alloys (x: 1, 3 and 5 wt.%Ag) were investigated. According to the experimental results, as the amount of Ag added in the casting alloys increases, the secondary phases (Mg4Ag, Mg54Ag17) emerging in the structure have become more clarified. Furthermore, it was observed that as the amount of Ag increased, the grain size decreased and thus the mechanical properties of the alloys increased. Similarly, the extrusion process enabled the grains to be refined and the mechanical properties to be increased. As a result of the in vitro tests performed, the Mg-1Ag exhibited very bad corrosion properties compared to other alloys. On the other hand, according to corrosive wear tests results, a high wear rate and friction coefficient were found for Mg-5Ag alloys.
Źródło:
Archives of Metallurgy and Materials; 2022, 67, 3; 889-900
1733-3490
Pojawia się w:
Archives of Metallurgy and Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Microstructural Studies of Ag/TiO2 Thin Film; Effect of Annealing Temperature
Autorzy:
Kamrosni, Abdul Razak
Dewi Suryani, Che Halin
Azliza, Azani
Mohd Mustafa Al Bakri, Abdullah
Mohd Arif Anuar, Mohd Salleh
Norsuria, Mahmed
Chobpattana, Varistha
Kaczmarek, L.
Jeż, Bartłomiej
Nabiałek, Marcin
Powiązania:
https://bibliotekanauki.pl/articles/2048839.pdf
Data publikacji:
2022
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
Ag/TiO2
annealing temperature
microstructure
optical properties
thin film
Opis:
Microstructures are an important link between materials processing and performance, and microstructure control is essential for any materials processing route where the microstructure plays a major role in determining the properties. In this work, silverdoped titanium dioxide (Ag/TiO2) thin film was prepared by the sol-gel method through the hydrolysis of titanium tetra-isopropoxide and silver nitrate solution. The sol was spin coated on ITO glass substrate to get uniform film followed by annealing process for 2 hours. The obtained films were annealed at different annealing temperatures in the range of 300°C-600°C in order to observe the effect on crystalline state, microstructures and optical properties of Ag/TiO2 thin film. The thin films were characterized by X-Ray diffraction (XRD), scanning electron microscopy (SEM), and UV-Vis spectrophotometry. It is clearly seen, when the annealing temperature increases to 500°C, a peak at 2θ = 25.30° can be seen which refers to the structure of TiO2 tetragonal anatase. The structure of Ag/TiO2 thin film become denser, linked together, porous and uniformly distributed on the surface and displays the highest cut-off wavelength value which is 396 nm with the lowest band gap value, which is 3.10 eV.
Źródło:
Archives of Metallurgy and Materials; 2022, 67, 1; 241-245
1733-3490
Pojawia się w:
Archives of Metallurgy and Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Modelling the potential distribution of the endemic oak Quercus vulcanica Boiss. & Heldr. ex Kotschy in Turkey from the last interglacial to the future: From near threatened to endangered
Autorzy:
Sarikaya, A.G.
Orucu, O.K.
Sen, I.
Sarikaya, O.
Powiązania:
https://bibliotekanauki.pl/articles/2130201.pdf
Data publikacji:
2022
Wydawca:
Polska Akademia Nauk. Instytut Dendrologii PAN
Tematy:
oak
biogeography
species distribution modelling
MaxEnt
biodiversity conservation
Opis:
The aims of this study are to model past (LIG, LGM and Mid-Holocene), present and future (2050 and 2070) distributions of the Quercus vulcanica Boiss. & Heldr. ex Kotschy by using Maximum Entropy, and to predict suitable areas for the conservation of the species for future planning. MaxEnt distribution modeling was used to model distributions. Results for past bioclimatic conditions show that the distribution area of the species expanded and then contracted (LIG to LGM and LGM to HOL). The modelling shows that the distribution range of the species will be narrower in the future. The species will be facing extinction towards 2070. Therefore, the conservation status of the species should be evaluated according to the present findings. Although the largest population of the Q. vulcanica is found in Isparta and Afyonkarahisar Provinces located in Southwestern Turkey, this area will not be suitable for the growth and survival of the species in the future. For this reason, a new nature reserve area should be established in a more suitable climate.
Źródło:
Dendrobiology; 2022, 88; 70-80
1641-1307
Pojawia się w:
Dendrobiology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Rhizoctonia solani AG5 and its offspring – morphology and sensitivity to fungicides
Autorzy:
Hendel, Patrycja
Moliszewska, Ewa
Nabrdalik, Małgorzata
Kudrys, Paweł
Knap, Natalia
Powiązania:
https://bibliotekanauki.pl/articles/11879091.pdf
Data publikacji:
2022
Wydawca:
Polskie Towarzystwo Botaniczne
Tematy:
Rhizoctonia solani
basidiospore
progeny
morphology
hyphae
fungicides
azoxystrobin
thiuram
thiophanate-methyl
Opis:
The objective of these studies was to identify differences and similarities within the progeny of Rhizoctonia solani AG5, which arose from basidiospores produced by the maternal strain ID23. The following characteristics were analyzed: appearance of the mycelium (color, structure, zonation, and presence of sclerotia), growth rate (at 10°C, 20°C, and 30°C), fungicide sensitivity, and hyphal structure. The mycelial color of R. solani AG5 ranged from white/cream to light and dark brown. The structure of the mycelium may be compacted or flattened with visible zoning or fluffy with dark brown sclerotia on the colony surface. Homokaryons and heterokaryons derived from homokaryons were analyzed by constructing a phylogenetic tree using morphological data. Single basidiospore-grown isolates formed a separate subclade, the majority of which were grouped with a maternal isolate; however, heterokaryons derived from them created a separate subclade. In addition, isolates grown in basidiospores germinated at low temperatures created their own group, but with some exceptions. This shows a divergence in the morphological parameters of the subsequent generations and within generations. The optimal temperature for growth was found to be between 20°C and 30°C. The exceptions were strains obtained from basidiospores that germinated at refrigerated temperatures. For these samples, 10°C was found to be the optimal growth temperature. The hyphae of homokaryons were characterized by the presence of branching at an almost right angle and the presence of a septum at the site of constriction of the branch itself. The mean diameter of hyphae ranged 2.93–15.60 μm, depending on the age of hyphae. The fungicidal compounds at a concentration of 10 ppm had no significant effect on the activity of the tested strains, whereas a tenfold increase in the dose reduced the growth ability of the tested isolates. The activity of fungicides containing azoxystrobin, thiuram, or thiophanate-methyl on R. solani resulted in a reduction in the mycelial growth rate only in the case of azoxystrobin and thiuram, and in some cases, it was completely inhibited (thiophanate-methyl).
Źródło:
Acta Mycologica; 2022, 57; 578
0001-625X
2353-074X
Pojawia się w:
Acta Mycologica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Sintering Behavior and Mechanical Property of Cu-Sn Alloy with Ag Addition Produced by Pulsed Electric Current Sintering
Autorzy:
Lee, Se Hwan
Ahn, Byungmin
Powiązania:
https://bibliotekanauki.pl/articles/2174574.pdf
Data publikacji:
2022
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
powder metallurgy
Cu-Sn alloy
pulsed electric current sintering
grinding tool
Opis:
This work mainly focuses on the sintering behavior of the Cu-Sn alloy with the addition of Ag up to 4 wt% after pulsed electric current sintering (PECS) process for ultra-fast sintering. The microstructural evolution was characterized using scanning electron microscopy (SEM), X-ray diffraction (XRD), and density measurements. The mechanical properties were evaluated via measurements of transverse rupture strength (TRS) and Rockwell hardness. The mechanism during the sintering process has been discussed thoroughly, and the effect on porosity with the addition of the Ag is also correlated. The results showed that the growth of porosity progressed with the amount of Ag up to 2 wt%, and further addition of Ag leads reduction in porosity. The effect on mechanical properties were improved slowly as the amount of Ag increased.
Źródło:
Archives of Metallurgy and Materials; 2022, 67, 4; 1475--1479
1733-3490
Pojawia się w:
Archives of Metallurgy and Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
Wyświetlanie 1-15 z 460

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