The influences of Bio-stimulator Compounds on growth, essential oil and chemical composition of chamomile plants grown under water stress

This study was conducted at the Experimental Nursery of the Ornamental Horticulture Department, Faculty of Agriculture, Cairo University, Giza, during the two successive seasons of 2013/2014 and 2014/2015. This work aimed to investigate the effect of water stress and bio-stimulator on the vegetative growth, flower yield, essential oil production and chemical compositions of Chamomile (Matricaria chamomilla L.). Water stress was imposed by three different irrigation intervals (4, 8 and 12 days). The plants received different irrigation intervals were sprayed every 2 weeks with bio-stimulator of either Amino Suam or Setter-2 at concentration of 500, 1000 and 2000 ppm for each one, while the control plants were sprayed with tap water. The experimental units were designed in randomized complete block design (RCBD) with 21 treatments and three replications for everyone treatment. The results showed that, highest values of plant height, number of branches/plant , diameter of flower heads, essential oil percentage, total chlorophylls content and total carbohydrates percentage were obtained from irrigation interval of 8 days as a compared to 4 or 12 days. Increasing irrigation intervals from 4 to 8 or 12 days resulted in a significant reduction in the stem diameter, fresh and dry weights of the herb, number of flower heads/plant, fresh and dry weights of flower heads, essential oil yield, as well as N, P and K% in dried herb while  proline content was increased with increasing intervals. On the other hand, in most cases all the studied parameters were increased significantly as a result of spraying plants with either concentration of Amino Suam or Setter-2 compared to control plants. Regarding the effect of interaction between the two studied factors, the results indicate that in most cases, plants irrigated every 4, 8 and 12 days and sprayed with any concentration of bio-stimulators (Amino Suam or Setter-2) had the values  for all the studied parameters which were significantly higher than those of control plants. Concerning essential oil composition, α-bisabolol oxide A, α-bisabolol oxide B, farnesene, bisabolone oxide, α-bisabolol and Chamazulene were the six major compounds of Chamomile oil. The highest percent of α-bisabolol oxide A (53.50%) were obtained from plants irrigated every 12 days and sprayed with Setter-2 at concentration of 2000 ppm and the highest percent of α-bisabolol oxide B (16.99%), farnesene (12.55%) and bisabolone oxide (12.03%) were resulted  from plants irrigated every 8 days and sprayed with Amino Suam at 1000 ppm, while the highest percent of α-bisabolol (6.36%) and Chamazulene (4.37%) were obtained from plants irrigated every 4 days and sprayed with Amino Suam at 2000 ppm

Infrared spectra, thermogravimetric analysis and antifungal studies of noval Cr(III), Fe(III) and Cu(II) 2-methyl-quinazolinone complexes

Some new solid complexes [CrCl3(L)3]×6H2O, [FeCl3(L)3]×6H2O and [Cu(CH3COO)2(L)3]×2H2O have been synthesized quantitatively by the interactions of 2-methyl-quinazolinone (L) with CrCl3.6H2O, FeCl3.6H2O and Cu(CH3COO)2.2H2O in a mixture of an ethanol-bidistilled water (1:1), at 60 °C. They were characterized by melting point, molar conductivity, magnetic moment, elemental analysis, infrared spectra and thermal analyses. The results supported the formation of the complexes and indicated that the ligand reacted as a monodentate ligand bound to the metal ion through the oxygen atom. The antifungal activity of the free ligand and their metal complexes were evaluated against several species, such as Fusarium solani, Rizoctonia solani, Sclortium rolfsii and Botryodiplodia and they showed a good antifungal activity to some selected fungal strain as compared with free ligand. KEY WORDS: Quinazolinone; Cr(III); Fe(III); Cu(II); Antifungal activity, Thermal analyses Bull. Chem. Soc. Ethiop. 2014, 28(1), 53-66.DOI: http://dx.doi.org/10.4314/bcse.v28i1.

Composition corporelle de poulets cou nu ou normalement emplumés: résultats dans un croisement de type chair

International audienc

The dilemma of widal test - which brand to use? a study of four different widal brands: a cross sectional comparative study

<p>Abstract</p> <p>Background</p> <p>Serodiagnosis of typhoid fever by Widal test based on demonstrating the presence of agglutinins (antibodies) in the serum of an infected patient, against the H (flagellar) and O (somatic) antigens of <it>Salmonella enterica </it>serotype Typhi has been associated with many debates. This is why the aim of this study was to: (i) Compare the diagnostic accuracy of four different commercial kits used to perform Widal test (Remel, BioSystems, Dialab and Biotec). (ii) Compare the sensitivity and specificity of both anti-O and anti-H antibodies. (iii) Compare the validity of single versus paired serum samples with a rising titer for the diagnosis of typhoid fever.</p> <p>Methods</p> <p>Duplicate serum samples were obtained from150 patients clinically diagnosed as typhoid fever patients. Moreover, single serum samples were obtained from 25 patients with febrile diseases other than typhoid fever. All samples were tested using the four different Widal brands and <it>Salmonella </it>Typhi IgM anti-LPS ELISA</p> <p>Results</p> <p><b>-</b>The results of Widal tests differed markedly using the four Widal brands in terms of sensitivity and specificity at three cut-off values of 1/80, 1/160 and 1/320. Remel brand gave the highest sensitivities and the lowest specificities and Dialab brand gave the highest specificities and the lowest sensitivities for both anti-O and anti-H antibodies at the three cut-off values.</p> <p><b>-</b>Four fold rise in the antibodies titer was not demonstrable among clinically diagnosed typhoid fever patients</p> <p>-H agglutinins were less sensitive and less specific than O agglutinins</p> <p>Conclusions</p> <p>-Widal test results showed marked discrepancies using different Widal brands. None of the serum samples of the typhoid fever patients showed four fold rise in the antibody titers. Raised O agglutinins were of slightly greater diagnostic value than raised H agglutinins.</p> <p>Significance and impact of study</p> <p>Widal test done sequentially using two brands could be of value in typhoid fever diagnosis. Single serum sample could be used for typhoid fever diagnosis relying on anti O titer.</p

Spectroscopic, thermal analyses, XRD spectra and nematicidal activity study of some new N2O2 tetradentate Schiff base metal ions complexes

ABSTRACT. A series of metal complexes [Co(HL)2(H2O)2]Cl2.5H2O (A), [Cu(HL)2](CH3COO)2.2H2O (B), [Y(HL)2]Cl3.2H2O (C), [ZrO(HL)2H2O]Cl2.H2O (D), [La(HL)2(H2O)2]Cl3.5H2O (E) and [UO2(HL)2](CH3COO)2 (F) were prepared. The structures of the compounds in solid state were detected by micro analytical, Fourier transform IR, 1H NMR, UV-Vis, mass, X-ray diffraction spectra, molar conductivity, magnetic susceptibility measurements and TG/DTG analysis. The IR spectral data point out that the ligand behaves as tridentate in nature with Cu(II), Y(III), U(VI) and bidentate with Co(II), Zr(IV) and La(III) metal ions. The conductivity values showed that the complexes found as electrolytes and the XRD models of the complexes indicated crystalline nature. The thermodynamic parameters of compounds have been detected using Coats-Redfern and Horowitz-Metzeger methods at n = 1 and n ≠ 1 and values point out more ordered activated complex formation. The nematicidal efficacy of compounds was assessed. &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; KEY WORDS: Schiff base, Spectroscopic analysis, Thermal analysis, XRD, Nematicidal &nbsp; Bull. Chem. Soc. Ethiop. 2021, 35(2), 381-397. DOI: https://dx.doi.org/10.4314/bcse.v35i2.1