4,4′-Methylenebis{N-[(E)-quinolin-2-yl­methylidene]aniline}

The title compound, C33H24N4, was prepared by the reaction of a bifunctional aromatic diamine (4,4′-diamino­diphenyl­methane) and an aldehyde (quinoline-2-carboxaldhyde). The mol­ecule consists of two nearly planar (or r.m.s. deviation = 0.017 Å) 4-methyl-N-[(E)-quinolin-2-yl­methyl­idene]aniline moieties, which are linked by the methyl­ene group. The angle between the mean planes of the two benzene rings connected to the methyl­ene group is 77.86 (11)°

4,4′-Oxybis{N-[(E)-quinolin-2-yl­methyl­idene]aniline}

The title Schiff base compound, C32H22N4O, was prepared by a reaction of 4,4′-diamino­diphenyl ether and 2-quinoline­carboxaldehyde. The mol­ecule consists of two 4-{N-[(E)-quinolin-2-yl­methyl­idene]amino}­phenyl units linked by an oxygen bridge. The dihedral angles between two benzene rings and between the two quinoline ring systems are 53.81 (7) and 42.56 (4)°, respectively. Inter­molecular C—H⋯N hydrogen bonding is present in the crystal structure

Improvement Axial Dispersion Calculation in Fibrous Garnished Fixed Beds Using the Neural Method

To determine accurately the physical modeling of flow through porous media and / or in chemical reactors, especially in the field of low Reynolds numbers, it is essential to compute the coefficient of axial dispersion. In prior studies, we employed the neural method to compute axial dispersion within fixed beds with parallelepiped and spherical packings. In the present study we apply the same method of calculation on heterogeneous fixed beds with large anisotropy using data from Poirier and Trinh on fibrous beds. Such an investigation could be however very useful while one has the desire to predict the mixing process to characterize the axial dispersion in fixed beds of anisotropic particles and when experimental measurements are not accessible and / or difficult to implement as for reactors and / or industrial complex porous media. To show also the robustness and applicability of this method, the calculation results obtained will be modeled using expressions similar to those proposed by Poirier and Trinh, so that we can compare our results with those obtained by these authors, under the same operating conditions. Furthermore, our study offers a comprehensive analysis encompassing all three examined fixed bed configurations, namely parallelepiped, spherical, and fibrous arrangements

1-{[4-(4-{[(2-Oxidonaphthalen-1-yl)methylidene]azaniumyl}phenoxy)phenyl]iminiumylmethyl}naphthalen-2-olate

The title Schiff base compound, C34H24N2O3, was prepared by a condensation reaction of bifunctional aromatic diamine (4,4′-diaminodiphenyl ether) with hydroxynaphtaldehyde. The asymmetric unit contains two independent molecules with similar conformations. The compound contains a central oxygen bridge and two functionalized [(E)-(phenyliminio)methyl]naphthalen-2-olate units. The dihedral angles between the benzene rings linking to the central O atom are 74.64 (19) and 69.85 (18)° in the two independent molecules. Intramolecular O—H...O hydrogen bonding occurs between the protonated imino N atoms and deprotonated hydroxy O atoms in both molecules. In the crystal, weak C—H...O hydrogen bonds are observed

Ethnobotanical investigation of Pistacia lentiscus L. grown in El Kala (Algeria), and phytochemical study and antioxidant activity of its essential oil and extracts

Ethnobotanical investigation was carried out using questionnaires among majority of El Kala (Algeria) inhabitants. The investigation found that lentisk (Pistacia lentiscus L.) is widely used in traditional therapy, especially in gastrointestinal and dermatological problems. Bioactive phytochemicals were determined by LC-MS/MS, and 14, 13, and 12 compounds were identified in leaves, stems and seeds, respectively. Flavonoids and phenolic acids were the most abundant compounds. Moreover, total phenols (306.5 mg GAE/g), flavonoids (95.25 mg RE/g), and condensed tannins (170.75 mg CE/g) contents were determined in leaves. Also, essential oil composition was investigated using GC/MS and 27 aroma compounds were identified. Monoterpene and sesquiterpene hydrocarbons were the most abundant. Besides, antioxidant activity was performed by DPPH, β-carotene bleaching, and ferrous ions chelating tests; and leaves extracts were more effective (IC50 of 2.75, 3.45, 13.5 µg/ml), than essential oils (IC50 of 10.5, 70.5, 157.25 µg/ml), and standards (trolox, 4.75; BHT, 5.25 µg/ml), respectively

sj-pdf-1-jso-10.1177_23971983241231082 – Supplemental material for Assessing hand and global disability in a cohort of Algerian patients with systemic sclerosis: Construct validities of the Arab Hand Function Index and the Arabic Health Assessment Questionnaire

Supplemental material, sj-pdf-1-jso-10.1177_23971983241231082 for Assessing hand and global disability in a cohort of Algerian patients with systemic sclerosis: Construct validities of the Arab Hand Function Index and the Arabic Health Assessment Questionnaire by Nouria Benmostefa, Rachid Malek, Marie Robert, Benjamin Chaigne, Samy Slimani, Samir Rouabhia, Daoud Roula, Mallem Djamel and Luc Mouthon in Journal of Scleroderma and Related Disorders</p