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Wyświetlanie 1-15 z 18
Tytuł:
A Silo structure to resist internal dust explosions
Autorzy:
Nasr, T.
Friedrich, J.
Eibl, J.
Powiązania:
https://bibliotekanauki.pl/articles/1955772.pdf
Data publikacji:
2003
Wydawca:
Politechnika Gdańska
Tematy:
dust explosion
silos
research
theory and experiment
plant execution
occurance of a dust explosion
Opis:
Over a period of about 12 years a research program on silo structures was going on in Germany, financed by the Deutsche Forschungsgemeinschaft. One of the subjects studied was the straining of silo structures in case of dust explosions, which often occur in silo plants. This was done by experiments and theoretical analysis. The first and third authors were engaged in this project. A few years later a very large silo structure was erected, where the third and second authors served as check engineers. A short report is given on the basic results obtained in the research and their application at the large silo plant, where in the meantime a dust explosion has occurred.
Źródło:
TASK Quarterly. Scientific Bulletin of Academic Computer Centre in Gdansk; 2003, 7, 4; 579-593
1428-6394
Pojawia się w:
TASK Quarterly. Scientific Bulletin of Academic Computer Centre in Gdansk
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Comparative pathogenesity of Fusarium species on some of the potato cultivars.
Autorzy:
Esfahani, Mehdi Nasr
Powiązania:
https://bibliotekanauki.pl/articles/2199608.pdf
Data publikacji:
2011-12-20
Wydawca:
Instytut Hodowli i Aklimatyzacji Roślin
Tematy:
Fusarium dry rot
Fusarium spp.
pathogenesity
potato
varieties
Opis:
The fusarium dry rot is one of the most important diseases of potato tubers causing considerable damages during the storage. Resistance sources are one of the fundamental methods in prevention and disease control. This study details the pathogenesity and assessment of susceptibility of commercially acceptable potato Cultivars to dry rot causing by Fusarium sulphureum , F. solani and F. oxysporum under similar conditions includings . inoculum , mehtod of inoculation, temperature , relative humidity and light. The results indicated that though the similar conditions were applied, the tubers of varieties reacted with differing levels of resistance to the species causing the disease. It was found that F. sulphureum was the most aggressive one, then fallowed by F. solani as far as the disease development is concerned and were independent. F. oxysporum did not cause considerable damages. In these expriments the commerical potato varieties were Seuminar, Rustica, clivastave, Dital, Escort, Monalisa, Marfona, Mondial, Aniona, Deraga, Asta, Hidram, Melisa, Moren, Mariyana, Pashandi, Frasco, Alva, Ceaser, Asva, Aula, Sandara , Marijke, Folva, Tiva, Fregate, Baraka, Aida, Diamant, Arnica, Panda, Atlas, Erigo, Volkano, Famosa, Carlita, Korrigan, Casmos, Assour, Cosima, Ariane, Desiree and saturna, in which started with most susceptible ones fallowed to resistance ones at end to F.sulphureum. The variety saturna were the most resistant one to the all tested species in these expriments.
Źródło:
Plant Breeding and Seed Science; 2011, 64; 45-54
1429-3862
2083-599X
Pojawia się w:
Plant Breeding and Seed Science
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Vali Nasr, The dispensable nation, American foreign policy in retreat, New York — Toronto 2013, ss. 301. Krytyczne rozważania o amerykańskiej polityce zagranicznej i bezpieczeństwa
Vali Nasr, the Dispensable Nation, American Foreign Policy in Retreat, New York — Toronto 2013, pp. 301. Critical Reflections on American Foreign Policy and Questions of Security
Autorzy:
Kosidło, Adam
Powiązania:
https://bibliotekanauki.pl/articles/418526.pdf
Data publikacji:
2014
Wydawca:
Akademia Marynarki Wojennej. Wydział Nauk Humanistycznych i Społecznych
Źródło:
Colloquium; 2014, 6, 4; 103-116
2081-3813
2658-0365
Pojawia się w:
Colloquium
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Superparamagnetyczne nanocząstki tlenku żelaza modyfikowane chitozanem: projektowanie, wytwarzanie, opis i działanie przeciwbakteryjne
Chitosan-modified superparamgnetic iron oxide nanoparticles: design, fabrication, characterization and antibacterial activity
Autorzy:
Shirifian-Esfahni, A.
Salehi, M. T.
Nasr-Esfahni, M.
Ekramian, E.
Powiązania:
https://bibliotekanauki.pl/articles/142792.pdf
Data publikacji:
2015
Wydawca:
Stowarzyszenie Inżynierów i Techników Przemysłu Chemicznego. Zakład Wydawniczy CHEMPRESS-SITPChem
Tematy:
superparamagnetyczny tlenek żelaza
chitozan
biokompatybilny nanokompozyt
działanie przeciwbakteryjne
superparamagnetic iron oxide
chitosan
biocompatible nanocomposite
antibacterial activity
Opis:
Celem badania było opracowanie układu o działaniu przeciwbakteryjnym. Aby go zrealizować przygotowano metodą współstrącania biokompatybilny nanokompozyt: superparamegnetyczne nanocząstki tlenku żelaza – chitozan. Właściwości morfologiczne i magnetyczne nanokompozytu badano różnymi metodami. W temperaturze pokojowej próbki wykazują właściwości superparamagnetyczne o nasyceniu magnetycznym cząstek opłaszczonych wynoszącym 65 emu/g. W celu sprawdzenia skuteczności hamowania rozwoju ludzkich patogenów uzyskany nanokompozyt poddano testowi antybakteryjnemu. Zsyntezowane koloidy i cienkie warstwy wykazują, w porównaniu do superparamagnetycznych nanocząstek tlenku żelaza, znacznie silniejsze działanie przeciwbakteryjne w stosunku do bakterii Gramujemnych Pseudomonas aeruginosa i Escherichia coli. Stężenie Fe3O4, przy którym następuje całkowite zahamowanie rozwoju bakterii wyniosło tylko 40 μ g.ml-1 dla Pseudomonas aeruginosa i 45 μ g.ml-1 dla Escherichia coli. Biokompatybilny nanokompozyt superparamegnetyczne nanocząstki tlenku żelaza – chitozan może być przydatny do zastosowań przeciwbakteryjnych i urządzeń medycznych.
The goal of this study was to develop an antibacterial activity system. To this end, we prepared using co-precipitation method a biocompatible nanocomposite: superparamagnetic iron oxide nanoparticles – chitosan. The morphological and magnetic properties of the nanocomposite were characterized by different techniques. At room temperature, the samples exhibit superparamagnetic behavior with the saturation magnetization of 65emu/g for coated nanoparticles. For checking its efficiency in inhibition of human pathogen, the yielded nanocomposite was used in antibacterial assay. The synthesized colloids and thin films have potent and completely strong antibacterial activity toward gram-negative bacteria Pseudomonas aeruginosa and Escherichia coli in comparison with superparamagnetic iron oxide nanoparticles which have less strong antibacterial activity. The concentration of Fe3O4 leading to a complete inhibition of bacteria growth was revealed at as low as at 40 μ g.ml-1 for Pseudomonas aeruginosa and 45 μ g.ml-1 for Escherichia coli. Thus superparamagnetic iron oxide nanoparticles – chitosan biocompatible nanocomposite could be suitable for antimicrobial applications and medical devices.
Źródło:
Chemik; 2015, 69, 1; 19-32
0009-2886
Pojawia się w:
Chemik
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Krytyka nauki przez odniesienie do holizmu wiedzy w myśli Seyyeda Hosseina Nasra oraz Ismaila al-Faruqiego
The critique of science in the light of epistemological holism in the thought of Seyyed Hos‐ sein Nasr and Ismail al‐Faruqi:
Autorzy:
Figas-Skrzypulec, Justyna
Powiązania:
https://bibliotekanauki.pl/articles/437395.pdf
Data publikacji:
2016
Wydawca:
Uniwersytet Pedagogiczny im. Komisji Edukacji Narodowej w Krakowie. Instytut Filozofii i Socjologii
Tematy:
science and religion
islam
islamic science
islamization of knowledge
philosophy of science
tawhid
holism
pseudoscience
secularization
Opis:
The paper presents a cognitive, educational and philosophical strategy, sometimes called reconstructionism (as it denotes e orts to reconstruct knowledge and science), proposed by a number of Muslim authors as a proper reaction to modern science. The pre‐modern background for this reaction is highlighted. Two examples are given: the Islamic science idea by Seyyed Hossein Nasr, and the Islamization of knowledge project by Ismail Raji al‐Faruqi. Their critique of Euro‐Atlantic science is based on its perceived e ects on society and morality (secularization, imperialism and colonialism, cruelty towards labora‐ tory animals, etc.) as well as on tawhid, the Islamic idea of unity. Their main postulates are to stop calling modern science objective and universal because this is a purely Western product; to produce an alternative indigenous science; to make science conform with Islamic doctrine and ethics; to reintroduce holism and sapiential aspects of knowledge into science. Critical voices, both Muslim and non‐Muslim, are quoted. All in all, reconstructionism is evaluated as a movement understandable to some extent but ine cient and idiosyncratic, unable to start objective and interesting research programmes on its own.
Źródło:
ARGUMENT: Biannual Philosophical Journal; 2016, 6, 1; 195-208
2083-6635
2084-1043
Pojawia się w:
ARGUMENT: Biannual Philosophical Journal
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Durability of hybrid fiber reinforced concrete at various environmental media
Autorzy:
Elhawary, Eslam Ibrahim Nasr
Elsafoury, Ashraf Hassan
Ahmad, Seleem Saleh Elsayed
Powiązania:
https://bibliotekanauki.pl/articles/35555212.pdf
Data publikacji:
2022
Wydawca:
Szkoła Główna Gospodarstwa Wiejskiego w Warszawie. Wydawnictwo Szkoły Głównej Gospodarstwa Wiejskiego w Warszawie
Tematy:
durability
hybrid fiber concrete
steel fiber
polypropylene fibre
compressive strength
splitting tensile strength
flexural strength
Opis:
Fiber’s addition to concrete mixture attracts researchers to determine the effect of fiber type on durability properties of hybrid performance concrete. In the present work, steel and polypropylene fibers are used in hybrid form in the experimental program. The objective of this paper is to investigate the mechanical properties of hybrid fiber reinforced concrete subjected to four various media: air, water, sodium chloride, and magnesium sulphate with a 7% concentration. The results showed that using hybrid fibers which consist of 1% steel fiber and 0.3% polypropylene fiber improved the compressive strength, splitting tensile strength, and flexural strength for different media for up to 360 days.
Źródło:
Scientific Review Engineering and Environmental Sciences; 2022, 31, 2; 88-100
1732-9353
Pojawia się w:
Scientific Review Engineering and Environmental Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Tomato disease detection model based on densenet and transfer learning
Autorzy:
Bakr, Mahmoud
Abdel-Gaber, Sayed
Nasr, Mona
Hazman, Maryam
Powiązania:
https://bibliotekanauki.pl/articles/2097440.pdf
Data publikacji:
2022
Wydawca:
Polskie Towarzystwo Promocji Wiedzy
Tematy:
leaf disease detection
convolutional neural network
deep learning
transfer learning
Opis:
Plant diseases are a foremost risk to the safety of food. They have the potential to significantly reduce agricultural products quality and quantity. In agriculture sectors, it is the most prominent challenge to recognize plant diseases. In computer vision, the Convolutional Neural Network (CNN) produces good results when solving image classification tasks. For plant disease diagnosis, many deep learning architectures have been applied. This paper introduces a transfer learning based model for detecting tomato leaf diseases. This study proposes a model of DenseNet201 as a transfer learning-based model and CNN classifier. A comparison study between four deep learning models (VGG16, Inception V3, ResNet152V2 and DenseNet201) done in order to determine the best accuracy in using transfer learning in plant disease detection. The used images dataset contains 22930 photos of tomato leaves in 10 different classes, 9 disorders and one healthy class. In our experimental, the results shows that the proposed model achieves the highest training accuracy of 99.84% and validation accuracy of 99.30%.
Źródło:
Applied Computer Science; 2022, 18, 2; 56--70
1895-3735
Pojawia się w:
Applied Computer Science
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Assessing and Monitoring Sustainable Land Management for Land Degradation Neutrality in Wadi El Farigh
Autorzy:
Erian, Wadid F.
Nasr, Yehia A.
Yacoub, Rafat K.
El-Abd, Raghda A.
Powiązania:
https://bibliotekanauki.pl/articles/24201800.pdf
Data publikacji:
2023
Wydawca:
Polskie Towarzystwo Inżynierii Ekologicznej
Tematy:
remote sensing
geostatistical analysis
GIS
land degradation change
Opis:
This study aimed to understand the new management challenges related to the impact of climate change on biodiversity, deterioration of agricultural productivity, food security, and increasing rates of desertification. This constitutes an important indicator for studying Land Degradation Neutrality (SDGs Target 15.3), which is considered a significant target in achieving the Sustainable Development Goals 2030. The present study is concerned with assessing and monitoring land management and land degradation in Wadi El Farigh from 2000 to 2019. Soil quality is a major part of the chain that leads to understanding sustainable land management of natural resources (land, groundwater, and natural vegetation). A geopedological approach produced the studied area’s physiographic and soil map. The study of changes in land degradation level in Wadi El Farigh over 20 years with a period of every five years shows a very high improvement in the study area from the year 2000 up to 2014. From 2015 to 2019, this class was reduced due to the effects of land degradation reflected by the use of saline water for irrigating crops. Using remote sensing and geostatistical analyses within the GIS environment illustrated that the soils were classified as Entisols, representing 79.45 of the total studied area, and Aridisols representing 20.55% of the total studied area.
Źródło:
Journal of Ecological Engineering; 2023, 24, 3; 55--63
2299-8993
Pojawia się w:
Journal of Ecological Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Bee Pollen as a Functional Product – Chemical Constituents and Nutritional Properties
Autorzy:
Alshallash, Khalid S.
Abolaban, Gomaa
Elhamamsy, Sam M.
Zaghlool, Ayman
Nasr, Ali
Nagib, Ashraf
Abd El-Hakim, Ahmed F.
Zahra, Abdullah A.
Hamdy, Ashraf E.
Taha, Ibrahim M.
Powiązania:
https://bibliotekanauki.pl/articles/2202357.pdf
Data publikacji:
2023
Wydawca:
Polskie Towarzystwo Inżynierii Ekologicznej
Tematy:
eucalyptus
clover
maize
phenolic content
amino acid
pollen
Opis:
Nutritional supplements play a role in promoting human protein synthesis, fitness recovery, and mental health protection. Pollen is considered a natural food with excellent nutritional value. The use of bee-gathered pollen as a nutritional supplement is now widespread around the world, and it is appreciated for its healing qualities. However, depending on the floral species and the region of origin, pollen has a wide range of nutritional value. It was found that clover pollen had the highest protein content (31.4 g/100 g DM), while the lowest content was observed in maize pollen (21.3%). Eucalyptus pollen had the highest lipid amount (9.49 g/100 g DM), while clover pollen had the lowest content (7.46 g/100 g). Phytochemical analysis showed that eucalyptus pollen occupied the highest total antioxidant activity (67.02%), followed by clover (58.25%) then maize (52.18%), whereas clover pollen had the highest phenolic content (1165 mg GAE/100 gm), compared with the other pollen varieties (949.4 to 1073 mg-GAE/100 gm). The contents of branched-chain amino acids were 29, 33.3, and 38.4 mg/g for maize, eucalyptus, and clover respectively, representing 17.87, 18.44, and 16.53% of total amino acids. The contents of total essential amino acids (EAAs) were 61.8, 73.0, and 83.5 mg/g for maize, eucalyptus, and clover pollen, respectively. Only eucalyptus pollen ultimately met the minimum requirements of EAAs for adults. In contrast, the other two types of pollen contained at least 3–4 limiting amounts of the essential amino acids leucine, lysine, phenylalanine, and valine. In conclusion, pollen is a good, affordable source of nutrients that can be utilized as beneficial dietary supplements for human health.
Źródło:
Journal of Ecological Engineering; 2023, 24, 2; 173--183
2299-8993
Pojawia się w:
Journal of Ecological Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Wyświetlanie 1-15 z 18

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