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  • 1
    Online Resource
    Online Resource
    Effects of different levels of saline water on infection of tomato by Botrytis cinerea, the causal agent of gray mold
    Agricultural Research Communication Center ; 2018
    In:  Indian Journal Of Agricultural Research , No. of ( 2018-10-09)
    Details
    In: Indian Journal Of Agricultural Research, Agricultural Research Communication Center, , No. of ( 2018-10-09)
    Abstract: A greenhouse experiment was conducted to investigate the effect of different levels of NaCl salt on tomato upon B. cinerea infection the causal agent of gray mold disease. The disease assessment was recorded after inoculation by using the scale based on percentage leaf area affected, and the growth of the plants was recorded for each treatment. Three weeks after inoculation by conidial suspension, the estimated disease severity on plants of tomato was 35.18% compared to the control. The highest incidence disease increase of gray mold (39.21%) was obtained with using 300 mM of NaCl after inoculation with B. cinerea compared with the other concentrations and as well as distilled water. Under severe salt stress (150 and 300mM) increased susceptibility of gray mold disease severity were observed in plants inoculated with B. cinerea, while under mild salt stress (50mM of NaCl) this effect was reversed. The treatment of plant by B.cinerea has reduced the growth of the aerial part of tomato plants (39.06%) after three weeks inoculation compared to the control. Three levels of NaCl (50, 100 and 150mM) increased respectively the plant height from 12.73 to 29.84%, 0.28 to 27.16% for the fresh eight and 5.75 to 33.35% for dry weight compared to the plants inoculated and irrigated by distilled water. NaCl addition at 300mM on plants inoculated with B. cinerea decreased the height, fresh weight and dry weight at 0.99, 4.45 and 11.01% respectively.
    Type of Medium: Online Resource
    ISSN: 0976-058X , 0367-8245
    URL: Article
    DOI: 10.18805/IJARe.A-327
    Language: Unknown
    Publisher: Agricultural Research Communication Center
    Publication Date: 2018
    detail.hit.zdb_id: 2569845-X
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  • 2
    Online Resource
    Online Resource
    Early-confinement strategy to tackling COVID-19 in Morocco; a mathematical modelling study
    EDP Sciences ; 2022
    In:  RAIRO - Operations Research Vol. 56, No. 6 ( 2022-11), p. 4023-4033
    Details
    In: RAIRO - Operations Research, EDP Sciences, Vol. 56, No. 6 ( 2022-11), p. 4023-4033
    Abstract: Morocco is among the countries that started setting up confinement in the early stage of the COVID-19 spread. Comparing the number of cumulative cases in various countries, a partial lock-down has delayed the exponential outbreak of COVID-19 in Morocco. Using a compartmental model, we attempt to estimate the mean proportion of correctly confined sub-population in Morocco as well as its effect on the continuing spread of COVID-19. A fitting to Moroccan data is established. Furthermore, we have highlighted some COVID-19 epidemic scenarios that could have happened in Morocco after the deconfinement onset while considering a different combination of preventive measures.
    Type of Medium: Online Resource
    ISSN: 0399-0559 , 2804-7303
    URL: Article
    DOI: 10.1051/ro/2022188
    RVK:
    QA 10000
    Language: English
    Publisher: EDP Sciences
    Publication Date: 2022
    detail.hit.zdb_id: 1468388-X
    SSG: 3,2
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  • 3
    Online Resource
    Online Resource
    Using vector divisions in solving the linear complementarity problem
    Elsevier BV ; 2012
    In:  Journal of Computational and Applied Mathematics Vol. 236, No. 7 ( 2012-01), p. 1919-1925
    Details
    In: Journal of Computational and Applied Mathematics, Elsevier BV, Vol. 236, No. 7 ( 2012-01), p. 1919-1925
    Type of Medium: Online Resource
    ISSN: 0377-0427
    URL: Article
    DOI: 10.1016/j.cam.2011.11.001
    Language: English
    Publisher: Elsevier BV
    Publication Date: 2012
    detail.hit.zdb_id: 1468806-2
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  • 4
    Online Resource
    Online Resource
    Effect of salinity-NaCl and clay-bentonite on some growth parameters of chickpea (Cicer arietinum L.) under greenhouse conditions
    Horizon Publisher India ; 2022
    In:  South Asian Journal of Experimental Biology Vol. 12, No. 5 ( 2022-09-19), p. 692-701
    Details
    In: South Asian Journal of Experimental Biology, Horizon Publisher India, Vol. 12, No. 5 ( 2022-09-19), p. 692-701
    Abstract: The present research was taken out to assess the physiological, biochemical, and photosynthetic responses of the chickpea (Cicer arietinum L) to the combination of clay-bentonite and saline water in greenhouse conditions, at four concentrations of NaCl (0, 50, 100 and 200 mM). A substantial decrease in all the studied parameters (germination rate, root and stem length, fresh weight or dry weight, relative water content and chlorophyll content) was observed when salinity was increased. However, the application of various NaCl concentrations improved the total soluble protein and soluble sugar content in plants cultivated in the substrate without bentonite. The imposition of 50 mM NaCl with bentonite increased total soluble protein content. In contrast, the 100 and 200 mM treatment led to decreased total soluble protein content. The use of the bentonite did not produce any changes into depreciating of the effect of NaCl stress. On the other hand, salinity-bentonite exacerbated a reduction in physiological and biochemical processes of chickpea. Indeed, the K+/Na+ ratio decreased in all organs of plants with increasing NaCl doses. This ratio is slightly in favor of K+ only in substrate without bentonite. Our findings indicated that salinity-bentonite exacerbated a reduction in physiological and biochemical processes.
    Type of Medium: Online Resource
    ISSN: 2230-9799
    URL: Issue
    URL: Article
    DOI: 10.38150/sajeb.12(5)
    DOI: 10.38150/sajeb.12(5).p692-701
    Language: Unknown
    Publisher: Horizon Publisher India
    Publication Date: 2022
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  • 5
    Online Resource
    Online Resource
    Effect of salinity levels on antifungal activity of essential oil from Thymus against Fusarium oxysporum
    Universidad del Zulia ; 2022
    In:  Revista de la Facultad de Agronomía, Universidad del Zulia Vol. 39, No. 3 ( 2022-8-22), p. e223941-
    Details
    In: Revista de la Facultad de Agronomía, Universidad del Zulia, Universidad del Zulia, Vol. 39, No. 3 ( 2022-8-22), p. e223941-
    Abstract: Thyme (Thymus sp.), a medicinal plant of the family Lamiaceae, is used in traditional medicine, contains a wide array of medicinally active components, in their great majority of a rather complex mixture of thymol, ρ-Cymene, γ-Terpinene, β-Caryophyllen, etc. This study aimed to evaluate the efficacy of Thymus vulgaris extract against Fusarium oxysporum f. sp.radicis-lycopersici strain under saline conditions, assuming soil with high salt content of the arid regions. Essential oil was extracted by hydrodistillation technique using a Clevenger apparatus. The essential oil compounds were identified by GC-MS analysis. Antifungal activity of essential oil against Fusarium oxysporum f. sp. radicis-lycopersici was investigated by agar dilution method. The main constituents of thyme essential oil were thymol (76.96 %), ρ-cymene (9.89 %) and γ-Terpinene (1.92 %). Essential oil from Thymus resented high in vitro activity, in controlling conidial germination and mycelial growth. However, the oil was significantly not active against the spore production under a salinity medium. The results showed that mycelial growth was stimulated in concentrations with 0.6 -1.5 %. In contrast, it was significantly reduced at a higher concentration (2 %). The application of NaCl caused a significant increase in the conidia production at various concentrations tested. NaCl has a minor inhibitory effect on conidial germination only when the concentration was 2 %. The results of this study indicate that salinity decreases the efficacy of essential oil against the pathogen.
    Type of Medium: Online Resource
    ISSN: 2477-9407
    Uniform Title: Efecto de los niveles de salinidad sobre la actividad antifúngica del aceite esencial de Thymus contra Fusarium oxysporum
    URL: Issue
    URL: Journal
    URL: Article
    DOI: 10.47280/RevFacAgron(LUZ).v39.n3
    DOI: 10.47280/RevFacAgron(LUZ)
    DOI: 10.47280//RevFacAgron(LUZ).v38.n3.07
    Language: English
    Publisher: Universidad del Zulia
    Publication Date: 2022
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  • 6
    Online Resource
    Online Resource
    A MODEL FOR ANNUAL PLANT DYNAMICS WITH SEED BANK AND DENSITY-DEPENDENT EFFECTS
    World Scientific Pub Co Pte Ltd ; 1995
    In:  Journal of Biological Systems Vol. 03, No. 02 ( 1995-06), p. 531-541
    Details
    In: Journal of Biological Systems, World Scientific Pub Co Pte Ltd, Vol. 03, No. 02 ( 1995-06), p. 531-541
    Abstract: A model is proposed for the population dynamics of an annual plant with a seed bank (i.e. in which a proportion of seeds remain dormant for at least one year). In this model, demographic parameters (dormancy and germination rate) of the seeds of the year are different from those of the seeds of the seed bank. First, a simple linear matrix model is deduced from the life cycle graph and a more complicated model is built by introducing density dependence effect. The obtained system, nonlinear with delay, can be simplified by a change of variables. A non-trivial fixed point of this system is obtained and the conditions of stability are studied. Under certain conditions (choice of exponential law for functional response of density dependence and absence of seed mortality before germination) we show that conditions of stability depend only on 3 parameters, the dormancy rate of the seeds of the year, dormancy rate of the seeds of the seed bank and the maximum potential fecundity of adults. Study of the behaviour of this model in the parameter space shows that the domain of demographic stability can be reduced if the dormancy rate of seeds of the year is low, even if the dormancy rate of seeds of the seed bank is high.
    Type of Medium: Online Resource
    ISSN: 0218-3390 , 1793-6470
    URL: Article
    DOI: 10.1142/S0218339095000496
    Language: English
    Publisher: World Scientific Pub Co Pte Ltd
    Publication Date: 1995
    detail.hit.zdb_id: 2026740-X
    SSG: 12
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  • 7
    Online Resource
    Online Resource
    On the basic reproduction number in a random environment
    Springer Science and Business Media LLC ; 2013
    In:  Journal of Mathematical Biology Vol. 67, No. 6-7 ( 2013-12), p. 1729-1739
    Details
    In: Journal of Mathematical Biology, Springer Science and Business Media LLC, Vol. 67, No. 6-7 ( 2013-12), p. 1729-1739
    Type of Medium: Online Resource
    ISSN: 0303-6812 , 1432-1416
    URL: Article
    DOI: 10.1007/s00285-012-0611-0
    Language: English
    Publisher: Springer Science and Business Media LLC
    Publication Date: 2013
    detail.hit.zdb_id: 1421292-4
    SSG: 12
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  • 8
    Online Resource
    Online Resource
    The Evolution of Dispersal in Random Environment
    Springer Science and Business Media LLC ; 2012
    In:  Acta Biotheoretica Vol. 60, No. 1-2 ( 2012-6), p. 155-165
    Details
    In: Acta Biotheoretica, Springer Science and Business Media LLC, Vol. 60, No. 1-2 ( 2012-6), p. 155-165
    Type of Medium: Online Resource
    ISSN: 0001-5342 , 1572-8358
    URL: Article
    DOI: 10.1007/s10441-011-9142-0
    Language: English
    Publisher: Springer Science and Business Media LLC
    Publication Date: 2012
    detail.hit.zdb_id: 1478105-0
    SSG: 12
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  • 9
    Online Resource
    Online Resource
    Inverse problem approach to regularized regression models with application to predicting recovery after stroke
    Wiley ; 2020
    In:  Biometrical Journal Vol. 62, No. 8 ( 2020-12), p. 1926-1938
    Details
    In: Biometrical Journal, Wiley, Vol. 62, No. 8 ( 2020-12), p. 1926-1938
    Abstract: Regression modelling is a powerful statistical tool often used in biomedical and clinical research. It could be formulated as an inverse problem that measures the discrepancy between the target outcome and the data produced by representation of the modelled predictors. This approach could simultaneously perform variable selection and coefficient estimation. We focus particularly on a linear regression issue, , where is the parameter of interest and its components are the regression coefficients. The inverse problem finds an estimate for the parameter , which is mapped by the linear operator to the observed outcome data . This problem could be conveyed by finding a solution in the affine subspace . However, in the presence of collinearity, high‐dimensional data and high conditioning number of the related covariance matrix, the solution may not be unique, so the introduction of prior information to reduce the subset and regularize the inverse problem is needed. Informed by Huber's robust statistics framework, we propose an optimal regularizer to the regression problem. We compare results of the proposed method and other penalized regression regularization methods: ridge, lasso, adaptive‐lasso and elastic‐net under different strong hypothesis such as high conditioning number of the covariance matrix and high error amplitude, on both simulated and real data from the South London Stroke Register. The proposed approach can be extended to mixed regression models. Our inverse problem framework coupled with robust statistics methodology offer new insights in statistical regression and learning. It could open a new research development for model fitting and learning.
    Type of Medium: Online Resource
    ISSN: 0323-3847 , 1521-4036
    URL: Issue
    URL: Article
    DOI: 10.1002/bimj.v62.8
    DOI: 10.1002/bimj.201900283
    RVK:
    WA 15000
    Language: English
    Publisher: Wiley
    Publication Date: 2020
    detail.hit.zdb_id: 131640-0
    detail.hit.zdb_id: 1479920-0
    SSG: 12
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  • 10
    Online Resource
    Online Resource
    Are tsetse fly populations close to equilibrium?
    Springer Science and Business Media LLC ; 1996
    In:  Acta Biotheoretica Vol. 44, No. 3-4 ( 1996-11), p. 317-333
    Details
    In: Acta Biotheoretica, Springer Science and Business Media LLC, Vol. 44, No. 3-4 ( 1996-11), p. 317-333
    Type of Medium: Online Resource
    ISSN: 0001-5342 , 1572-8358
    URL: Article
    DOI: 10.1007/BF00046536
    Language: English
    Publisher: Springer Science and Business Media LLC
    Publication Date: 1996
    detail.hit.zdb_id: 1478105-0
    SSG: 12
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