Wszystkie pola: vera - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: First report of leaf spot disease of Aloe vera caused by Fusarium proliferatum in India
Autorzy:: Avasthi, S.
Gautam, A.K.
Bhadauria, R.
Powiązania:: https://bibliotekanauki.pl/articles/66778.pdf
Data publikacji:: 2018
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: plant disease
leaf spot disease
Aloe vera
Fusarium proliferatum
pathogenicity
India
Opis:: Severe leaf spot disease was observed on Aloe vera plants in the winters of 2011 and 2012 during a survey of various nurseries of Gwalior, India. Irregular, sunken, dark creamish brown spots having reddish brown margin were noticed on both surfaces of the leaves. The causal organism was consistently isolated from symptomatic leaves on potato dextrose agar media (PDA). A total 59 isolates of fungi were recovered from diseased A. vera leaves, and 37 isolates were identified as belonging to the genus Fusarium. On the basis of morphological characteristics and internal transcribed spacer (ITS) region of rDNA amplified using the primers ITS4/ITS5 the pathogen was identified as Fusarium proliferatum (Matsushima) Nirenberg and pathogenicity of the isolate was confirmed by using Koch’s postulates. To the best of our knowledge, this is the first report of leaf spot disease caused by Fusarium proliferatum on A. vera plants in India.
Źródło:: Journal of Plant Protection Research; 2018, 58, 2
1427-4345
Pojawia się w:: Journal of Plant Protection Research
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: Fuzzy state feedback with double integrator and anti-windup for the Van de Vusse reaction
Autorzy:: Márquez-Vera, C. A.
Màrquez-Vera, M. A.
Yakoub, Z.
Ma’arif, A.
Castro-Montoya, A. J.
Cázarez-Castro, N. R.
Powiązania:: https://bibliotekanauki.pl/articles/2134892.pdf
Data publikacji:: 2022
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: fuzzy state feedback
LMIs
Van de Vusse reaction
double integrator
anti-windup
Opis:: Chemical processes use to be non-minimum phase systems. Thereby, they are a challenge for control applications. In this paper, fuzzy state feedback is applied in the Van de Vusse reaction that has an inverse response. The control design has an integrator to enhance the control performance by eliminating the steady-state error when a step reference is applied. An anti-windup action is used to reduce the undershoot in the system response. In practice, it is not possible to have always access to all the state variables. Thus, a fuzzy state observer is implemented via LMIs. Frequently, the papers that show similar applications present some comments about disturbance rejection. To eliminate the steady-state error when a ramp reference is used, in this work, a second integrator is aggregated. Now, the anti-windup also reduces the overshoot generated due to the usage of two integrators in the final application.
Źródło:: Archives of Control Sciences; 2022, 32, 2; 383--408
1230-2384
Pojawia się w:: Archives of Control Sciences
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 3.

Tytuł:: Hexagonal Photonic Crystal Fiber Behaviour as a Chromatic Dispersion Compensator of a 40 Gbps Link
Autorzy:: Betancur-Pérez, A. F.
Botero-Cadavid, J. F.
Reyes-Vera, E.
Gómez-Cardona, N.
Powiązania:: https://bibliotekanauki.pl/articles/226794.pdf
Data publikacji:: 2017
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: BER
chromatic dispersion
DWDM
photonic crystal fibers
vector finite element method
Opis:: In this paper, the capabilities of chromatic dispersion compensation of a photonic crystal fiber with a hexagonal distribution of circular air holes was investigated. The vector finite element method with scattering boundary condition was used to analyze a set of configurations of the fiber in which the distance between air holes’ centers was modified. With this method it was possible to obtain the values of chromatic dispersion and confinement factor in the C fiber band. The best suited configurations were tested in a 160 km optical link with a bit rate of 40 Gbps. The performance was evaluated by measuring the bit error rate for a set of 20 channels with channel spacing of 100 GHz. T e simulation results showed that is possible to reach values of hromatic dispersion as low as −850 ps/nm⋅km, confinement losses close to 10⁻³ dB/km and good BER results in the order of 10⁻¹⁷ for a wavelength of 1550 nm.
Źródło:: International Journal of Electronics and Telecommunications; 2017, 63, 1; 93-98
2300-1933
Pojawia się w:: International Journal of Electronics and Telecommunications
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 4.

Tytuł:: In vivo inhibitory effect of Aloe vera gel on the ability of mouse parental splenic lymphocytes to induce cutaneous angiogenesis in recipient F1 mice
Autorzy:: Skopinski, P.
Lewicki, S.
Balan, B.J.
Kocik, J.
Zdanowski, R.
Skopinska-Rozewska, E.
Siwicki, A.K.
Powiązania:: https://bibliotekanauki.pl/articles/30546.pdf
Data publikacji:: 2014
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Opis:: Lymphocyte-induced angiogenesis test (LIA) is a model of local graft-versus-host (GVH) reaction, marker of the earliest events resulting from activation of donor lymphocytes after contact with host semi-allogeneic histocompatibility antigens. The effect of in vivo oral administration of Aloe vera gel for 21 days to maternal strain (Balb/c) donor mice on the ability of their splenic lymphocytes to induce cutaneous angiogenesis (LIA test) in F1 Balb/c x C3H recipients, was studied. Results: Neovascular reaction evaluated 72 hours after cells grafting was significantly lower in F1 mice grafted with lymphocytes collected from Aloe- fed donors, than in recipients of lymphocytes collected from respective controls. Conclusions: This observation opens the promise of safe and ethically acceptable possibility of use of Aloe vera gel in human donors in prevention of GVHD in recipients of bone marrow grafts.
Źródło:: Polish Journal of Veterinary Sciences; 2014, 17, 1
1505-1773
Pojawia się w:: Polish Journal of Veterinary Sciences
Dostawca treści:: Biblioteka Nauki

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