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Wyświetlanie 1-15 z 3720
Tytuł:
Factorial combination of manure rates and bunch pruning intensities influenced bunch physical traits of two plantain [Musa spp. AAB] genotypes
Autorzy:
Aba, S C
Baiyeri, K.P.
Tenkouano, A.
Powiązania:
https://bibliotekanauki.pl/articles/24687.pdf
Data publikacji:
2009
Wydawca:
Polska Akademia Nauk. Instytut Agrofizyki PAN
Tematy:
manure rate
bunch pruning
intensity
bunch physical trait
plantain
Musa
poultry manure
bunch yield
genotype
Źródło:
International Agrophysics; 2009, 23, 3; 207-213
0236-8722
Pojawia się w:
International Agrophysics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Heavy Metal Concentrations along the Banks of the Sitnica River and in Four Types of Herbaceous Plants
Autorzy:
Abazi, A. S.
Sallaku, F.
Bytyçi, P.
Spahiu, M. H.
Millaku, F.
Powiązania:
https://bibliotekanauki.pl/articles/123595.pdf
Data publikacji:
2018
Wydawca:
Polskie Towarzystwo Inżynierii Ekologicznej
Tematy:
concentration
metals
plant species
soils
Sitnica River
Opis:
This paper presents the results of the heavy metals accumulation (Cd, Cr, Pb, Cu, Zn, Mn, and Fe) in soils and plants (Typha angustifolia L., Urtica dioica L., Ranunculus sardous Crantz and Rumex Crispus L.) collected along the banks of the Sitnica River, which flows through various cities of Kosovo and is quite stressed due to the discharges of urban, industrial, and agricultural pollutants. The aim of this research was to verify the accumulation of heavy metals in water, soil and plants, since vegetables that used as food are cultivated in the vicinity of sample collection. The analyses were conducted with applied methodology in the analytic laboratory of Kosovo Agriculture Institute by using MP-AES 4200 for Cd and Cr, ASS-Scientific for Zn, Cu, Fe, Mn and Pb in plant samples, whereas 4100 MP-AES was used for determination of metals in soil. The results show variations in different metal values found in the samples of the analyzed soils and plants. The lowest values accumulation of the metals analyzed were recorded at A1 (Devetak Station) near the river source and did not contain anthropogenic influences, whereas the highest values were recorded at A3 (Kuzmin Station), which belongs to the middle flow of the Sitnica River that is polluted by wastewater (urban) discharges.
Źródło:
Journal of Ecological Engineering; 2018, 19, 5; 1-9
2299-8993
Pojawia się w:
Journal of Ecological Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Validation of tropical artificial soil by chronic toxicity studies on Eisenia fetida against superphosphate
Autorzy:
Abbiramy, K.S.
Ross, P.R.
Paramanandham, J.
Powiązania:
https://bibliotekanauki.pl/articles/10839.pdf
Data publikacji:
2014
Wydawca:
Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:
validation
tropical soil
artificial soil
chronic toxicity
Eisenia fetida
superphosphate
Opis:
The research methodology recommended by the OECD (Organization of Economic Co-operation and Development) and ISO (International Organization for Standardization) guidelines for testing of chemicals meets the most criteria expected for ecotoxicological testing except the testing condition and the organic matter. The guidelines were initially developed by temperate countries, with testing conditions as 20 °C and the organic matter as sphagnum peat which is commonly available in those countries. But these two criterions are difficult to be followed in tropical countries. Thus there arises a need of modifying these criterions for toxicity studied in tropical regions. In this study a trial was made for substituting the fermented coir pith for sphagnum peat and the validation of the modified tropical artificial soil (TAS) was done by conducting chronic toxicity studies on Eisenia fetida against an inorganic fertilizer, superphosphate (SP) under tropical condition, i.e., 28 ±2 °C. The performed study showed that the SP determined lower earthworm mortality in TAS comparing to OECD soil for all tested concentration levels. The number of juveniles produced in OECD soil was also significantly reduced (p < 0.05) than in TAS. This may be due to the production of large amount of hydrogen ions when the temperature increases and making the medium acidic. The fermented coir pith was more suitable for ecotoxicity studies under tropical condition than sphagnum peat.
Źródło:
International Letters of Natural Sciences; 2014, 08, 1
2300-9675
Pojawia się w:
International Letters of Natural Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Genetic variability and host specialization in Alternaria alternata colonizing Solanaceous crops in Sudan
Autorzy:
Abbo, A.S.
Idris, M.O.
Elballa, M.A.
Hammad, A.M.
El Sidding, M.A.R.
Karlovsky, P.
Powiązania:
https://bibliotekanauki.pl/articles/66044.pdf
Data publikacji:
2018
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
plant disease
early blight
genetic variability
host
Alternaria alternata
diversity
Solanaceae
crop
amplified fragment length polymorphism
Sudan
Opis:
Early blight disease caused by Alternaria sp. is one of the most devastating diseases of Solanaceous crops widely distributed in Sudan. The aim of this study was to determine the genetic variation among different Alternaria isolates recovered from different Solanaceae crops showing typical symptoms of early blight disease. Infected leaves of tomato, potato, eggplant and pepper were collected from different geographical zones in Sudan. The recovered fungal isolates were identified to the genus level based on cultural and morphological characteristics. Five representative isolates were sent to the CABI Bioscience, U.K. for confirmation. The genetic relationship among the isolates was determined using the amplified fragments length polymorphism (AFLP) technique and the generated data were used to create similarity matrices using the PAST 3.01 software package. Dendrograms were constructed based on Jaccard’s similarity coefficients. A total of 70 fungal isolates was recovered from the tested plants and all of them showed morphological characteristics typical of Alternaria spp. The conidia appeared in multiple-branched chains with spore sizes in the range of 2.38−13.09 μm × 12.30−43.63 μm. Therefore, the isolates were identified as Alternaria alternata (Fr.) Keissl. The identification was then confirmed by CABI.AFLPbased dendrogram which revealed five clusters with a significant cophenetic correlation coefficient (r = 0.834) between the dendrogram and the original similarity matrix irrespective of their geographical origins. Eighteen (75%) of the Alternaria isolated from tomato leaves were clustered together in cluster I and five isolates formed two separate clusters, viz. cluster IV (T-Kh5 and T-H1) and cluster V (T-H4 and T-Med2). The remaining isolate, T-Am5, grouped with one of the potato isolates in cluster III. The other isolates which were recovered from potato, pepper and eggplants were all separated from the tomato isolates in the largest cluster.
Źródło:
Journal of Plant Protection Research; 2018, 58, 3
1427-4345
Pojawia się w:
Journal of Plant Protection Research
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Experimental Analysis of Podded Propulsor on Naval Vessel
Autorzy:
Abdul-Ghani, M.P.
Yaakob, O.
Ismail, N.
Kader, A.S.A.
Ahmad-Sabki, A. F.
Singaraveloo, P.
Powiązania:
https://bibliotekanauki.pl/articles/116528.pdf
Data publikacji:
2014
Wydawca:
Uniwersytet Morski w Gdyni. Wydział Nawigacyjny
Tematy:
Naval Vessel
Podded Propulsor
Marine Technology Centre
Opis:
This paper describes the effect of pod propulsor attachment to the existing Naval Vessel hull form which was designed for conventional propulsor in aspects of resistance and motion characteristics. These investigations were carried out on a 3.0 m model by experimental works in the towing tank 120m x 4m x 2.5m at the Marine Technology Centre (MTC), Universiti Teknologi Malaysia (UTM). The basis ship chosen for this study is Sealift class type MPCSS (Multi Purpose Command Support Ship). In this study, the design for the new pod propulsor is based on a proven design and scaled down to suit this type of hullform accordingly. This paper describes the resistance comparison between bare and podded hulls in calm water as well in waves. The seakeeping test for hull with and without pod in regular waves at service speed of 16.8 knots were carried out at wavelength to model length ratio, Lw/Lm between 0.2 and 1.2. The outcomes from this experimental works on hull with and without pod were compared.
Źródło:
TransNav : International Journal on Marine Navigation and Safety of Sea Transportation; 2014, 8, 1; 153-156
2083-6473
2083-6481
Pojawia się w:
TransNav : International Journal on Marine Navigation and Safety of Sea Transportation
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Environmental Impact on Biodegradation Speed and Biodegradability of Polyethylene and Zea Mays Starch Blends
Autorzy:
Abioye, Abiodun A.
Oluwadare, Oreofe P.
Abioye, Oluwabunmi P.
Obuekwe, Chukwunonso C.
Afolalu, Adeniran S.
Atanda, Pethuel O.
Fajobi, Muyiwa A.
Powiązania:
https://bibliotekanauki.pl/articles/123808.pdf
Data publikacji:
2019
Wydawca:
Polskie Towarzystwo Inżynierii Ekologicznej
Tematy:
biodegradable
biodegradation rate
biopolymer
loamy sand
Zea mays
Opis:
Several studies projected that by year 2025, 4.3 billion urban residents will be generating about 2.2 billion tonnes of municipal solid waste per year, over 10% of which will be plastics. The landfills in Nigeria are uncontrolled and do not conform to the international standards of similar operations elsewhere in the world; this makes the disposal of synthetic polymers in the soil even more hazardous. Due to the availability and relative inexpensiveness of Zea mays in Nigeria, this study explores the use of this natural polymer, blended with low density polyethylene (LDPE) as an alternative to synthetic plastics. Biodegradability of the biopolymer blend was observed while buried in loamy sand soil with properties similar to the soil found in the general area of the study. The results showed that a polymer blend with 50% LDPE (50 CoS) by weight had the most uniform weight loss over the period of the study. Under the soil conditions given in the study, 50 CoS also had the steadiest rate of degradation. Hence 50% LDPE (wt.%) blended with Zea mays starch is the optimal ratio with regard to the degradability of biopolymer in loamy sand soil Ota, Ogun State, Nigeria.
Źródło:
Journal of Ecological Engineering; 2019, 20, 9; 277-284
2299-8993
Pojawia się w:
Journal of Ecological Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Control of root-knot nematode (Meloidogyne incognita) in tomato (Solanum lycopersicum) crop using Siam weed (Chromolaena odorata) compost manure
Autorzy:
Abolusoro, S.A.
Odekiya, A.O.
Aremu, C.
Ige, S.
Izuogu, N.B.
Abolusoro, P.F.
Erere, A.
Obaniyi, S.
Powiązania:
https://bibliotekanauki.pl/articles/1080263.pdf
Data publikacji:
2020
Wydawca:
Instytut Ogrodnictwa
Tematy:
root-knot nematode
Meloidogyne incognita
tomato
seedling
Roma cultivar
Solanum lycopersicum
compost
manure
Chromolaena odorata
carbofuran
growth
yield
Opis:
A field experiment was conducted at Landmark University Omu-Aran, Nigeria from June to November 2017 and repeated at the same time in the year 2018 on a nematode infested soil to evaluate the effects of different amounts of Siam weed compost on the performance of root-knot nematode (RKN) infested tomato. The compost was applied a week before planting as soil amendment at the amount of 0.0, 0.5, 1.5, and 2.0 t·ha-1, while carbofuran was applied at the rate of 3.0 kg·ha-1. Four weeks old tomato seedlings cultivar ‘Roma VF’, which is susceptible to RKN, was transplanted to already prepared soil. Results of the experiment showed that the compost, especially in the amount 2 t·ha-1 and carbofuran at 3 kg·ha-1, brought about significant reduction of the population of RKN in soil and roots, and a significant increase in the growth and yield of tomato. The result of the experiment showed that Siam compost can be used for the managing root-knot nematodes in tomato cultivation, as an environmentally safe factor.
Źródło:
Journal of Horticultural Research; 2020, 28, 1; 87-92
2300-5009
Pojawia się w:
Journal of Horticultural Research
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Identification and Quantification of Gases Releasing from Furan no Bake Binder
Autorzy:
Acharya, S. G.
Vadher, J. A.
Kanjariya, P. V.
Powiązania:
https://bibliotekanauki.pl/articles/379863.pdf
Data publikacji:
2016
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
furan
GC-MS
FTIR
binder
pyrolysis
furan no bake
spoiwo
piroliza
Opis:
Sand samples with furan binder were prepared using Sand, Furfuryl Alcohol and Toluene Sulfonic Acid with ratio 100:0.85:0.30. To identify and quantify gases releasing from furan binder various studies like FTIR, TGA and GC-MS were carried out. After analyzing our materials using above mentioned characterizations the chemical formula of the Resin and Binder and amount of gases releasing from composition were confirmed. After studying various reports on pyrolysis process of furan binder calculation of the % of various gases emitting during pyrolysis process of furan was carried out. Sample of gas collected from mold was analyzed using GC-MS. Based on GC-MS measurement various gases emitting from furan sand mold were identified and their amount were calculate and compared with the international standers of permissible gas emission limits in a foundry. The purpose of this paper is to assist foundries in pollution prevention by devising clean technologies which maintain or improve the quality of ambient surrounding. This paper aimed at minimization of pollution of air by using various techniques.
Źródło:
Archives of Foundry Engineering; 2016, 16, 3; 5-10
1897-3310
2299-2944
Pojawia się w:
Archives of Foundry Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Unification of feature description in medical databases
Autorzy:
Adamczak, J.
Szczepaniak, P. S.
Powiązania:
https://bibliotekanauki.pl/articles/333755.pdf
Data publikacji:
2005
Wydawca:
Uniwersytet Śląski. Wydział Informatyki i Nauki o Materiałach. Instytut Informatyki. Zakład Systemów Komputerowych
Tematy:
zmienne lingwistyczne
porównanie opisów różnych typów
feature descriptions
linguistic variables
comparison of descriptions of diverse types
Opis:
In this paper, the problem of unified analysis of data and descriptions of objects is discussed. Basic concept for measure of similarity between features described in diverse manner is presented as well as the method for unification of different types of description.
Źródło:
Journal of Medical Informatics & Technologies; 2005, 9; 181-185
1642-6037
Pojawia się w:
Journal of Medical Informatics & Technologies
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Identification and analysis of optimal method parameters of the V-block waviness measurements
Autorzy:
Adamczak, S.
Zmarzły, P.
Stępień, K.
Powiązania:
https://bibliotekanauki.pl/articles/202040.pdf
Data publikacji:
2016
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
V-block method
waviness measurements
detectability coefficients
metoda V-block
pomiar falistości
współczynnik wykrywalności
Opis:
At the Kielce University of Technology, a new method of waviness measurement of cylindrical surfaces has been developed. The article deals with the research conducted to find the optimal V-block method parameters that can be used in a measuring device applied to waviness measurement of cylindrical surfaces. In order to keep high measuring accuracy of V-block method, all detectability coefficients which are function of V-block method parameters should not be negative. For this purpose computations were carried out in order to find such angular parameters that can be easily applied in measuring device and allow for obtaining positive detectability coefficients. Results of the study presented in this paper make it possible to modify the design of the measuring device. According to the authors, it will result in increasing the accuracy of V-block waviness measurement of cylindrical parts.
Źródło:
Bulletin of the Polish Academy of Sciences. Technical Sciences; 2016, 64, 2; 325-332
0239-7528
Pojawia się w:
Bulletin of the Polish Academy of Sciences. Technical Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Influence of raceway waviness on the level of vibration in rolling-element bearings
Autorzy:
Adamczak, S.
Zmarzły, P.
Powiązania:
https://bibliotekanauki.pl/articles/201675.pdf
Data publikacji:
2017
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
rolling element bearing
vibration
waviness
Anderon
technological heredity
łożysko toczne
wibracja
falistość
anderon
dziedzictwo technologiczne
Opis:
This paper provides a quantitative analysis of how raceway waviness (RONt) in 6304-type bearings affects their vibration. The waviness of bearing races was measured at the actual points of contact between the balls and the races. The measurements were conducted in the range of 16–50 undulations per revolution (UPR). The bearing vibration was analyzed in three bandwidths of frequency: low (LB) (50 ÷ 300 Hz), medium MB (300 ÷ 1800 Hz) and high HB (1800 ÷ 10 000 Hz), as well as in the full RMS bandwidth. The paper also presents the procedure used to determine the actual points of contact between the ball and each race to specify the point of waviness measurement. The method of calculation of the contact angle for a ball bearing is also discussed. The Pearson linear correlation coefficients were determined to analyze the relationships between the waviness parameters and the level of vibration. The test results show that an increase in the surface waviness on the inner and outer raceways causes an increase in the vibration level. The influence is most visible for the medium frequency bandwidth.
Źródło:
Bulletin of the Polish Academy of Sciences. Technical Sciences; 2017, 65, 4; 541-551
0239-7528
Pojawia się w:
Bulletin of the Polish Academy of Sciences. Technical Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Research methods and testing stand developed to examine vibrations generated by rolling bearing
Metody badania poziomu drgań generowanych przez łożyska toczne oraz stanowisko badawcze do ich prowadzenia
Autorzy:
Adamczak, S.
Domagalski, R.
Sender, E.
Zmarzły, P.
Gorycki, Ł.
Powiązania:
https://bibliotekanauki.pl/articles/327250.pdf
Data publikacji:
2016
Wydawca:
Polska Akademia Nauk. Polskie Towarzystwo Diagnostyki Technicznej PAN
Tematy:
vibration level
rolling bearing
quality
anderon meter
poziom drgań
łożysko toczne
jakość
anderometr
Opis:
The article presents research methods of rolling bearing vibration level measurement and evaluation of vibration measurement capability of Anderon meter STPPD developed at the Kielce University of Technology. In order to assess the measuring ability of Anderon meter STPPD comparative studies were performed. In these studies the noise tester MVH900 SKF - a standard instrument for measuring vibration, was adopted as a professional device. Analysis of the test results allow to reliably assess that both devices have comparable measurement capabilities.
W artykule przedstawiono metody badań poziomu drgań generowanych przez łożyska toczne oraz dokonano oceny zdolności pomiarowych stanowiska badawczego Anderometr STPPD opracowanego na Politechnice Świętokrzyskiej. W celu oceny zdolności pomiarowych Anderometru STPPD zostały przeprowadzone badania porównawcze. W badaniach tych za przyrząd wzorcowy przyjęto profesjonalne urządzenie do pomiaru drgań: noise tester MVH900 firmy SKF. Analiza wyników badań pozwoliła stwierdzić, że oba urządzenia dysponują porównywalnymi możliwościami pomiarowymi.
Źródło:
Diagnostyka; 2016, 17, 1; 41-49
1641-6414
2449-5220
Pojawia się w:
Diagnostyka
Dostawca treści:
Biblioteka Nauki
Artykuł
Wyświetlanie 1-15 z 3720

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