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Wyświetlanie 1-15 z 175
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:
Effects of Abandoned Urban Infrastructure on Environmental Development in Ogun State
Wpływ zaniechania budowy i rozwoju infrastruktury miejskiej na rozwój środowiska w stanie Ogun
Autorzy:
Abdul, E.O.
Raimi, K.O.
Ibisola, A.S.
Powiązania:
https://bibliotekanauki.pl/articles/385508.pdf
Data publikacji:
2018
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
Tematy:
zaniechanie
opuszczona infrastruktura miejska
rozwój środowiska
abandonment
abandoned urban infrastructure
environmental development
Opis:
The well-being of any nation is based on its readily available and functional infrastructure. The abandonment of urban infrastructure does become a threat and causes an environmental nuisance, slowing down development. The study assesses the impact of abandoned urban infrastructure on the environmental development of Ogun State. It examines the effects of abandonment on the environment and identifies the various causes and types of abandoned urban infrastructure in the state. Questionnaires and interviews were used to gather data from estate surveyors, valuers, and end users of urban infrastructure. The data was analyzed using a descriptive analysis and the Relative Importance Index (RII). The effects of abandoned urban infrastructure on environmental development were determined to be environmental degradation, a decrease in business activities, and an increase in health issues. The study recommends that infrastructural projects should be done in bits to avoid abandonment, on-going construction should always be kept clean to avoid negatives uses, good health care and environmental cleaning up should be done for the people, and the use of turnkey projects as well as the globally established PPP model of infrastructure delivery.
Dobrostan każdego narodu opiera się na łatwo dostępnej i funkcjonalnej infrastrukturze. Zaniedbania w dziedzinie infrastruktury miejskiej stają się zagrożeniem i powodują uciążliwości środowiskowe spowalniające rozwój. W artykule oceniano wpływ zaniechania budowy i rozwoju infrastruktury miejskiej na rozwój środowiska w stanie Ogun. Zbadano wpływ powyższych działań na środowisko, ustalono przyczyny zaniechań w zakresie różnych typów infrastruktury miejskiej w Nigerii. Do zebrania danych od inspektorów i rzeczoznawców majątkowych oraz użytkowników końcowych infrastruktury miejskiej wykorzystano narzędzia: kwestionariusz ankietowy i wywiad. Dane poddano analizie opisowej i analizowano za pomocą względnego wskaźnika ważności. W wyniku badań ustalono, jaki wpływ na rozwój środowiska miało porzucenie infrastruktury miejskiej: degradacja środowiska, zmniejszenie działalności gospodarczej, występowanie problemów zdrowotnych. Autorzy zalecają, aby projekty infrastrukturalne były wykonywane w sposób pozwalający uniknąć porzucenia, a istniejące konstrukcje powinny być poddawane konserwacji.
Źródło:
Geomatics and Environmental Engineering; 2018, 12, 3; 5-15
1898-1135
Pojawia się w:
Geomatics and Environmental Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Constraints in the application of biotechnology to cassava production in Nigeria
Autorzy:
Abideen, A.S.
Powiązania:
https://bibliotekanauki.pl/articles/11501.pdf
Data publikacji:
2013
Wydawca:
Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:
application
biotechnology
cassava
plant production
economic development
constraint
Nigeria
Opis:
Biotechnology has potential to enhance the production of agricultural and industrial products for achieving food security and economic development. In agriculture, biotechnology enhances the production of high yielding and disease resistance crops necessary for achieving food security and industrial development. This paper examines the constraints in the application of biotechnology research to the production of cassava in Nigeria. The study utilized primary data collected through questionnaire administration and interview from three research institutions working on cassava biotechnology in Nigeria. Findings showed that weak infrastructural facilities, poor funding, inadequate competent personnel and absence of appropriate legislation are the constraints in the application of biotechnology to cassava production in Nigeria. In addition, one out of the three research institutions has adequate and regular electricity supply through its own captive power plant while the remaining two research institutions relied more on electricity from the national grid. Inadequate funding and shortage of competent personnel were peculiar challenge confronting all the research institutions covered by the study. The study recommends improvement in electricity supply, production of more biotechnology scientists and adequate funding to enhance biotechnology research in Nigeria.
Źródło:
International Letters of Natural Sciences; 2013, 04
2300-9675
Pojawia się w:
International Letters of Natural Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Analysis of sales, costs and demands for timber species in selected timber markets of Plateau State, Nigeria
Autorzy:
Adedire, O.
Sadiku, Y.
Popoola, A.S.
Oladejo, A.O.
Onuwa, G.C.
Mbah, J.J.
Sikiru, G.K.
Powiązania:
https://bibliotekanauki.pl/articles/28407491.pdf
Data publikacji:
2023
Wydawca:
Instytut Badawczy Leśnictwa
Źródło:
Folia Forestalia Polonica. Series A . Forestry; 2023, 65, 4; 179-186
0071-6677
Pojawia się w:
Folia Forestalia Polonica. Series A . Forestry
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Potential toxicity assessment of novel selected pesticides against sand termite, Psammotermes hypostoma Desneux workers (Isoptera: Rhinotermitidae) under field conditions in Egypt
Autorzy:
Ahmed, M.A.I.
Eraky, E.-S.A.
Mohamed, M.F.
Soliman, A.-A.S.
Powiązania:
https://bibliotekanauki.pl/articles/66459.pdf
Data publikacji:
2015
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Opis:
The sand termite, Psammotermes hypostoma Desneux is a major pest in the New Valley Governorate, Egypt. Great efforts have been taken to control the pest. We evaluated the toxicity of four selected neonicotinoids [acetamiprid (20% SP), imidacloprid (20% SL), thiamethoxam (18.6% SC), and thiamethoxam (40% WG)], and one organophosphate pesticide [chlorpyrifos (48% EC)] against P. hypostoma workers. The investigation was done under field conditions, using the palm fronds method. However, the reduction percentages in palm fronds was recorded as the height of the sandy clay formed by termite workers on palm frond surfaces, when the fronds had been treated with a different concentration of each pesticide. The results were recorded after 15, 30, 45, and 60 days. Chlorpyrifos (48% EC) was considered the most potent pesticide among all the pesticides tested, but acetamiprid (20% SP) was considered the most toxic among the neonicotinoid pesticides tested. Moreover, the formulation of thiamethoxam (18.6% SC) was more powerful than thaimethoxam (40% WG). Furthermore, the reduction percentages on palm fronds increased significantly with an increase of the exposure period (from 15 to 60 days), as a result of the surface foraging activity of the sand termite workers. These results are given as unique and encouraging trends in controlling sand termites in Egypt.
Źródło:
Journal of Plant Protection Research; 2015, 55, 2
1427-4345
Pojawia się w:
Journal of Plant Protection Research
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Yield and fruit quality of Ziziphus jujuba L. trees as affected by preharvest foliar application of calcium and ascorbic acid
Autorzy:
Al-Saif, A.M.
Ahmed, M.A.-A.
Al-Obeed, R.
El-Sabagh, A.S.
Powiązania:
https://bibliotekanauki.pl/articles/12695934.pdf
Data publikacji:
2020
Wydawca:
Uniwersytet Przyrodniczy w Lublinie. Wydawnictwo Uniwersytetu Przyrodniczego w Lublinie
Źródło:
Acta Scientiarum Polonorum. Hortorum Cultus; 2020, 19, 5; 151-157
1644-0692
Pojawia się w:
Acta Scientiarum Polonorum. Hortorum Cultus
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Application of Nanoparticles in the Process of Phase Change Paraffin in a Chamber
Autorzy:
Alizadeh, As’ad
Powiązania:
https://bibliotekanauki.pl/articles/102698.pdf
Data publikacji:
2019
Wydawca:
Stowarzyszenie Inżynierów i Techników Mechaników Polskich
Tematy:
aluminum oxide
phase change material
nusselt number
nanoparticles
tlenek glinu
materiał o przemianie fazowej
liczba Nusselta
nanocząstki
Opis:
In this study, melting of a phase changing material enriched with nanoparticles in a circular ring-rectangular enclosure was investigated and the results were analyzed. At the beginning of the melting process in the absence of a natural displacement, the mechanism of conduction heat transfer around the hot cylinder is the dominant mechanism. Over time, natural displacement gradually appears and deforms the melting boundary above the cylinder. Over time, when the thickness of the liquid phase grows, the thermal resistance increases, this can be verified by reviewing the Nusselt chart. So this phenomenon reduces the rate of melting and temperature changes. The results show that increasing the nanoparticle volume fraction due to increased conductivity and decreasing latent heat causes an increase in the melting rate and the amount of energy absorbed. From the study of various volume fractions, it can be concluded that the use of a higher volume fraction of 3% is more appropriate both in terms of energy and in terms of the melting rate. However, it should be taken into account that if the melting rate exceeds this value, it may cause agglomeration and deposition of nanoparticles and reducing system efficiency.
Źródło:
Advances in Science and Technology. Research Journal; 2019, 13, 3; 113-119
2299-8624
Pojawia się w:
Advances in Science and Technology. Research Journal
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Use of One and Two Horizontal Plates to Reduce the Drag Force on the Rigid Cylinder Located Inside the Channel: Approach of the Immersed Interface Method
Autorzy:
Alizadeh, As’ad
Jafarmadar, Samad
Zekri, Hussein Jebrail
Powiązania:
https://bibliotekanauki.pl/articles/102565.pdf
Data publikacji:
2019
Wydawca:
Stowarzyszenie Inżynierów i Techników Mechaników Polskich
Tematy:
rigid cylinder
immersed interface method
numerical simulation
drag force
sztywny cylinder
metoda zanurzonego interfejsu
symulacja numeryczna
siła tarcia
Opis:
Immersed interface method is a non-matching boundary approach that has been taken into consideration in recent years. In this method, there is no need to coincide between the fluid and the solid grids. Eulerian grid is used for fluid domain and Lagrangian grid is used for solid domain. Using the Dirac Delta function, the connection between these two grids is established. Separation of the flow from the cylinder surface causes a high pressure drop in some parts of the cylinder, resulting in a dramatic increase in drag force. Drag force reduction is very important in some engineering issues, and several methods have been proposed to achieve this goal. In this study, the flow around a rigid cylinder is simulated. The goal is to reduce the drag force on the cylinder through one and two horizontal plates. The results are in good agreement with prior numerical results.
Źródło:
Advances in Science and Technology. Research Journal; 2019, 13, 4; 188-193
2299-8624
Pojawia się w:
Advances in Science and Technology. Research Journal
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
How do Mentha plants induce resistance against Tetranychus urticae (Acari: Tetranychidae) in organic farming?
Autorzy:
Allam, S.F.
Soudy, B.A.-N.
Hassan, A.S.
Ramadan, M.M.
Baker, D.A.
Powiązania:
https://bibliotekanauki.pl/articles/65704.pdf
Data publikacji:
2018
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
Mentha
Mentha piperita
Mentha viridis
spearmint
garden mint zob.spearmint
common mint zob.spearmint
lamb mint zob.spearmint
mackerel mint zob.spearmint
plant resistance
ecology
high performance liquid chromatography
Tetranychus urticae
Acari
Tetranychidae
Opis:
Tetranychus urticae (Acari: Tetranychidae) infesting many plants but Mentha viridis L., and Mentha piperita L., were low in number of infestation. Therefore the objective of this study was to identify the resistance of M. viridis and M. piperita plants against T. urticae by studying the external shape and internal contents of those plants. For morphological studies, dried leaves were covered with gold utilizing an Edwards Scan coat six sputter-coater. For histological studies, arrangements of Soft Tissue technique were used. For phytochemical studies, the plants were cut, dried and then high performance liquid chromatography (HPLC) was used. While feeding the mites were collected from the area between oily glands, trichomes and respiratory stomata in both mint species. The most important leaf structures in aromatic plants are the oily glands found on the external part of the leaves (both upper and lower epidermis). The number of oil glands in M. viridis leaves was greater than in M. piperita; the trichomes on the epidermis of M. viridis were greater in number than in M. piperita; the spongy mesophyll in M. viridis was much thicker than in M. piperita. The essential oils in the leaves of both mint species contained 71 compounds representing 99.61% of the total oil constituents identified from M. viridis before infestation, and 90.95% after infestation, and about 99.65% from M. piperita before infestation, and 99.98% after infestation.
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:
Health risk assessment of heavy metals in irrigation water, soil and vegetables from different farms in Riyadh district, Saudi Arabia
Autorzy:
Alturiqi, A.S.
Albedair, L.A.
Ali, M.H.H.
Powiązania:
https://bibliotekanauki.pl/articles/1192504.pdf
Data publikacji:
2020
Wydawca:
Uniwersytet Warmińsko-Mazurski w Olsztynie / Polskie Towarzystwo Magnezologiczne im. Prof. Juliana Aleksandrowicza
Tematy:
heavy metal
vegetables
dietary intake
health risk
HQ
THQ
ILCR
Opis:
The safety and security of different foodstuffs are considered important and have a high priority in global sustainable development. The contents of Fe, Mn, Cu, Zn, Ni, Pb and Cd were estimated in edible parts of 60 vegetable samples, irrigation water and agricultural soil collected from 5 farms in suburban areas around Riyadh district, Saudi Arabia. Also, soil pollution indices, pollution load index and contamination factor (PLI, CF), bioaccumulation factor (BAF), non-carcinogenic and carcinogenic risk indices (HQ, THQ, and ILCR) were estimated. The content of heavy metals in irrigation water and soil was within the recommended permissible levels, except for Cd in soil, which exceeds permissible levels. The trend of metal concentrations in both agricultural soil and vegetables was found in the order: Fe > Mn > Zn > Cu > Ni > Pb > Cd. Cluster analysis of the metal content in vegetables showed a tendency towards the accumulation of heavy metals in the order of leaves > roots > fruits > flowers > tuber. The BAFs values found were < 1.0, HQs values for Fe, Mn, Cu, Zn and Ni were found to be < 1, while the estimated HQs for Pb and Cd were > 1, posing greater risk to the health of adults and children. THQ values were higher for children compared to adults. ILCR values for Cd showed a serious issue, as it exceeds the threshold risk limit (>10−4) in all parts of the investigated vegetables in all sampling sites.
Źródło:
Journal of Elementology; 2020, 25, 4; 1269-1289
1644-2296
Pojawia się w:
Journal of Elementology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Removal of Pb+2, Cu+2 and Ag+ cations from wastewater by modified ZnO nanoparticles with S, N-substituted thiouracil derivative
Autorzy:
Amini, Z.
Hajiaghababaei, L.
Shahvelayati, A.S.
Powiązania:
https://bibliotekanauki.pl/articles/14269.pdf
Data publikacji:
2018
Wydawca:
Uniwersytet Warmińsko-Mazurski w Olsztynie / Polskie Towarzystwo Magnezologiczne im. Prof. Juliana Aleksandrowicza
Źródło:
Journal of Elementology; 2018, 23, 4
1644-2296
Pojawia się w:
Journal of Elementology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Position, swimming direction and group size of fin whales (Balaenoptera physalus) in the presence of a fast-ferry in the Bay of Biscay
Autorzy:
Aniceto, A.S.
Carroll, J.
Tetley, M.J.
Oosterhout, C.
Powiązania:
https://bibliotekanauki.pl/articles/49025.pdf
Data publikacji:
2016
Wydawca:
Polska Akademia Nauk. Instytut Oceanologii PAN
Źródło:
Oceanologia; 2016, 58, 3
0078-3234
Pojawia się w:
Oceanologia
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Coraz głośniej o kobietach
Autorzy:
as.
(as).
Powiązania:
Strażak 2000, nr 6, s. 10
Data publikacji:
2000
Tematy:
Ozga, Krystyna
Związek Ochotniczych Straży Pożarnych RP. Zarząd Główny ZOSP (Warszawa). Komisja Kobiecych Drużyn Pożarniczych ZG ZOSP
Kobieta wiejska organizacje
Opis:
Wspólne posiedzenie Komisji Kobiecych Drużyn Pożarniczych ZG ZOSP RP i przedstawicielek kół gospodyń wiejskich.
Fot.
Dostawca treści:
Bibliografia CBW
Artykuł
Wyświetlanie 1-15 z 175

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