In the title compound, C(19)H(22)N(4)O(2), the tetra-hydro-pyrimidine ring adopts an envelope conformation (with the N atom connected to the benzyl group representing the flap). This benzyl group occupies a quasi-axial position. The two benzyl groups lie over the tetra-hydro-pyridimidine ring. The amino group is a hydrogen-bond donor to the nitro group.

The innovative design and synthesis of nanofiber based hydro-philic/phobic membranes with a thin hydro-phobic nanofiber layer on the top and a thin hydrophilic nanofiber layer on the bottom of the conventional casted micro-porous layer which opens up a solution for membrane pore wetting and improves the pure water flux in membrane distillation.

The title limonoid 14-de-oxyxyloccensin K, C(27)H(34)O(7), isolated from Chisocheton ceramicus (Meliaceae), features an oxygen linkage between carbon-3 and carbon-8 along with a tetra-hydro-furyl sub-unit. The six-membered rings adopt chair configurations and the tetra-hydro-furyl sub-unit has an envelope shape.

In the title compound, C14H14O4, the dihedral angle between the hydro-furan and benzene rings is 88.41 (15)°. The hydro-pyran ring adopts an envelope conformation, with the O-bound methyl-ene C atom as the flap. In the crystal, weak aromatic π-π stacking is observed [centroid-centroid separation = 3.848 (2) Å].

In the title compound, C13H15N3S, the 4,5-di-hydro-3H-1,2,4-triazole ring is nearly planar [maximum deviation = 0.020 (1) Å], while the cyclo-hexane ring adopts a chair conformation. The dihedral angle between the 4,5-di-hydro-3H-1,2,4-triazole ring and the phenyl ring is 74.68 (7)°. No specific inter-molecular inter-actions are discerned in the crystal packing.

The title adamantane derivative, C(19)H(25)NO(2), was synthesized as part of a study into potential anti-tuberculosis agents. The adamantane skeleton displays shorter than normal C-C bond lengths ranging between 1.5230 (15) and 1.5329 (16) Å. The structure displays O-H⋯O hydrogen bonding and an inter-digitated layered packing structure with distinct hydro-philic and hydro-phobic regions.

The title compound, C(14)H(21)Cl(3)O(9)·2H(2)O, is a disaccharide constructed from a galactose and a fructose. In the mol-ecular structure, the tetra-hydro-furan five-membered ring and tetra-hydro-pyran six-membered ring assume envelope and chair conformations, respectively. An extensive O-H⋯O hydrogen-bonding network occurs in the crystal structure.

Triangulation of LiDAR data can produce unnatural water surface. Therefore, it is necessary to hydroflatten LiDAR data. Hydro-flattening is driven primarily by cartographic mapping needs, and can also help hydrologic analysis, because hydro-flattened surfaces behave naturally; allowing water flow from upstream to downstream. Detailed hydro-flattening requirements have been stated by USGS, which...

BACKGROUND Hippocratea celastroides Kunth, commonly known as "cancerina", is used in Mexican Traditional Medicine for the treatment of gastric and intestinal infections, systemic and skin inflammation, injuries and gastritis. The aim of this research was to assess the anti-Helicobacter pylori activities of hydro-ethanolic root-bark extracts from Hippocratea celastroides Kunth in naturally infec...

this study investigates the amount of suspended solid particles in three drinking water wells, conducted several times per day in the city of mashhad. the results have also been used for the review and optimization of tested hydro-cyclones. for this purpose, 18 different hydro-cyclones, based on the experimental design process of the taguchi method, were designed and the affecting factors were ...