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Wyświetlanie 1-3 z 3
Tytuł:
ANTINOCICEPTIVE ACTION OF ONONIS SPINOSA LEAF EXTRACT IN MOUSE PAIN MODELS
Autorzy:
Abbas, Manal
Jaffal, Sahar M.
Powiązania:
https://bibliotekanauki.pl/articles/895326.pdf
Data publikacji:
2019-04-30
Wydawca:
Polskie Towarzystwo Farmaceutyczne
Tematy:
analgesic activity
Ononis spinosa
opioid receptor
Opis:
Ononis spinosa (spiny restharrow) is a perennial herb that belongs to the Fabaceae family. Among several uses, the aerial parts of O. spinosa are used in traditional medicine for toothache. In this study, analgesic activity of the methanolic extract of leaves was studied. In writhing test, the 300 mg/kg and 600 mg/kg doses of O. spinosa extract produced 90.1% and 94.5% inhibition of abdominal cramps, respectively compared to 23.6% inhibition produced by 30 mg/kg diclofenac sodium. O. spinosa methanolic extract reduced the time of licking in early and late phases of formalin test. The inhibitory effect of O. spinosa extract was more pronounced in late phase. The lowest dose tested (300 mg/kg) of O. spinosa extract produced 81.0% inhibition compared to 50.5% inhibition in 30 mg/kg diclofenac sodium in the late phase of formalin test. This effect was not abrogated by glibenclamide, naloxone or atropine indicating that the action of O. spinosa in formalin test is not mediated by ATP-sensitive K+ channel, opioid or muscarinic receptors. In tail-flick and hot-plate tests, O. spinosa increased the latency time at 30 min and 150 min. Naloxone antagonized the action of O. spinosa in both tests suggesting an interaction with opioid receptor as a possible mechanism of O. spinosa in thermal pain models at the spinal and supraspinal levels. Phytochemical screening indicated the presence of phenolics, saponins, flavonoids, and terpenoids. Alkaloids, sterols, and anthraquinone glycosides were absent. HPLC analysis confirmed the presence kaempferol, apigenin and myricetin in the extract.
Źródło:
Acta Poloniae Pharmaceutica - Drug Research; 2019, 76, 2; 299-304
0001-6837
2353-5288
Pojawia się w:
Acta Poloniae Pharmaceutica - Drug Research
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Spectroscopic Investigation of Rare-Earth Doped Phosphate Glasses Containing Silver Nanoparticles
Autorzy:
Amjad, R.
Sahar, M.
Ghoshal, S.
Dousti, M.
Samavati, M.
Riaz, S.
Tahir, B.
Powiązania:
https://bibliotekanauki.pl/articles/1400152.pdf
Data publikacji:
2013-04
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
78.30.Ly
78.55.-m
78.66.Jg
Opis:
Phosphate glasses having compositions $(59.5-x)P_2O_5-40MgO-xAgCl-0.5Er_2O_3$, where x=0, 1.5 mol.% is prepared using melt-quenching technique. Infrared, absorption and photoluminescence spectra of $Er^{3+}$-doped magnesium phosphate glasses have been reported. The amorphous nature of the host glass is confirmed by X-ray diffraction technique. Transmission electron microscope image confirms the existence of silver nanoparticles inside the glass matrix. The localized surface plasmon resonance band of silver is found to be located around ≈ 528 nm for the $Er^{3+}$ free sample. A frequency upconversion process from infrared to visible is observed on excitation with 797 nm radiation. Furthermore, an enhancement in the emission at 540 nm and 632 nm is found due to the local field effect of silver nanoparticles. Our findings may contribute towards the development of solid state laser and sensors.
Źródło:
Acta Physica Polonica A; 2013, 123, 4; 746-749
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
An Improved M-ary Modulation Scheme Based on Chaotic Dynamics
Autorzy:
Abdullah, Hikmat N.
Sahar, Asaad H.
Saeed, Thamir R.
Powiązania:
https://bibliotekanauki.pl/articles/958105.pdf
Data publikacji:
2019
Wydawca:
Instytut Łączności - Państwowy Instytut Badawczy
Tematy:
chaos
M-ary modulation
non-coherent detection
zigzag map
Opis:
This paper proposes an improved chaos-based M-ary modulation system. It reproduces deterministic chaotic dynamics to create M-ary non-coherent modulation. The proposed modulation system transmits data using autonomous chaotic sequences. It separates the chaotic dynamics through the use of interleavers and realigns them through the use deinterleavers. The simulation results show that the improved scheme overperforms its traditional counterpart. The degree of improvement grows as the M-ary order is increased, with a penalty of increased system complexity.
Źródło:
Journal of Telecommunications and Information Technology; 2019, 4; 13-19
1509-4553
1899-8852
Pojawia się w:
Journal of Telecommunications and Information Technology
Dostawca treści:
Biblioteka Nauki
Artykuł
    Wyświetlanie 1-3 z 3

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