Development of cathodic electrocatalysts for use in low temperature H2/O2 fuel cells with an alkaline electrolyte Second quarterly report, Oct. 1 - Dec. 31, 1965

Cathodic electrocatalysts for use in low temperature hydrogen-oxygen fuel cells with an alkaline electrolyte-corrosion resistance and activity testing of materials and element

Crystal structure of 3-benzoyl-2-[(5-bromo-2-Hydroxy-3-methoxybenzylidene)amino]-4,5,6,7-tetrahydrobenzo[b]thiophene

In the cyclo­hexene ring of the title compound, C23H20BrNO3S, the -(CH2)4- atoms are positionally disordered [occupancy ratio = 0.753 (6):0.247 (6)]. The ring has a half-chair conformation for both the major and minor components. The dihedral angles between the mean plane of the thio­phene ring and those of the benzene and phenyl rings are 35.2 (4) and 57.7 (3)°, respectively. The planes of the two aryl rings are twisted with respect to each other by 86.4 (6)°. In the mol­ecule, there is an O-H...N hydrogen bond forming an S(6) ring motif. In the crystal, mol­ecules are linked via C-H...O hydrogen bonds, forming chains parallel to [100].Publisher PDFPeer reviewe

Development of cathodic electrocatalysts for use in low temperature H2/O2 fuel cells with an alkaline electrolyte First quarterly report, Jul. 1 - Sep. 30, 1965

Potentiostatic and corrosion resistance tests for metallic ingots prepared as rotating disk electrodes - cathodic electrocatalysts for use in low temperature hydrogen-oxygen fuel cell

Phosphorus recovery: a need for an integrated approach

Increasing cost of phosphate fertilizer, a scarcity of high quality phosphate rock (PR)and increasing surface water pollution are driving aneed to accelerate the recovery and re-use ofphosphorus (P) from various waste sectors. Options to recover P occur all along the open P cycle from mining to households to oceans. However, P recovery as a regional and global strategy towards P sustainability and future food, bio energy and water security is in its infancy because of a number of technological, socio-economic and institutional constraints. There is no single solution and resolving these constraints requires concerted collaboration betweenrelevant stakeholders and an integrated approach combiningsuccessful business models withsocio-economic and institutional change. We suggest that an operational framework is developed for fast tracking cost-effective recovery options

Development of cathodic electrocatalysts for use in low temperature H2/O2 fuel cells with an alkaline electrolyte Third quarterly report, Jan. 1 - Mar. 31, 1966

Metal, alloy, and metal compound testing for corrosion resistance and activity as oxygen electrodes for hydrox fuel cell with alkaline electrolyt

1-Bromo-2-(10β-dihydro­artemisin­oxy)ethane

The title compound, C17H27BrO5, DEB, is a derivative of artemisinin which is used in malara therapy. The OR-group at C12 is cis to the CH3-group at C11 and axially oriented on ring D which has a chair conformation. The crystal packing is stabilized by several weak inter­molecular C—H⋯O inter­actions, which combine to form a C—H—O bonded network parallel to (001)

2-Chloro-N-[2-(2-fluoro­benzo­yl)-4-nitro­phen­yl]-N-methyl­acetamide

The title compound, C16H12ClFN2O4, crystallizes with two mol­ecules in the asymmetric unit in which the dihedral angles between the mean planes of the two benzene rings are 65.1 (7) and 65.6 (6)°. In each mol­ecule, the nitro group displays rotational disorder over two orientations in a 0.503 (11):0.497 (11) ratio and the Cl atom is disordered in a 0.432 (5):0.568 (5) ratio. In one mol­ecule, the F atoms is statistically disordered over two positions. The crystal packing features weak inter­molecular C—H⋯O and C—H⋯Cl inter­actions, which form a layered network

2,4-Bis(4-fluoro­phen­yl)-2,3-dihydro-1H-1,5-benzodiazepine

In the title compound, C21H16F2N2, the seven-membered 1,4-diazepine ring of the benzodiazepine ring system adopts a distorted-boat conformation. The benzene ring of this system makes dihedral angles of 18.6 (2) and 78.8 (2)° with those of two fluoro­phenyl substituents. In the crystal, inversion dimers linked by two weak C—H⋯F hydrogen bonds generate R 2 2(20) ring motifs. There are also weak N—H⋯π and C—H⋯π inter­actions

Dimensional Effects on Solitonic Matter and Optical Waves with Normal and Anomalous Dispersion

We investigate bright and dark solitons with anomalous or normal dispersion and under transverse harmonic confinement. In matter waves, positive atomic mass implies anomalous dispersion (kinetic spreading) while negative mass gives normal dispersion (kinetic shrinking). We find that, contrary to the strictly one-dimensional case, the axial and transverse profiles of these solitons crucially depend on the strength of the nonlinearity and on their dispersive properties. In particular, we show that, like bright solitons with anomalous dispersion, also dark solitons with normal dispersion disappear at a critical axial density. Our predictions are useful for the study of atomic matter waves in Bose-Einstein condensates and also for optical bullets in inhomogeneous Kerr media.Comment: To be published in Journal of Physics B: At. Mol. Opt. Phy