Four uranyl methylenediphosphonates have been synthesized from reactions of uranyl nitrate and methylenediphosphonate in water. Three of the compounds, (1) (UO(2))[CH(2)(PO(3)H)(2)](H(2)O) x 2 H(2)O, (2) (UO(2))[CH(2)(PO(3)H)(2)](H(2)O) x 4 H(2)O, and (3) (UO(2))[O(3)PCH(2)PO(3)H](H(2)O) x 3 H(2)O x NH(4), have been synthesized under ambient conditions whereas compound 4, (UO(2))[CH(2)(PO(3)H)(...

-A glass in the intermediate composition of montmorillonite and beidellite, 50/50 in mole ratio, was treated under a hydrothermal pressure of 100 MPa, in the temperature range from 250 to 500~ and durations from 2 to 129 days. The phases identified in the products were plotted in a time-temperaturetransformation (TTT) diagram. The TTT diagram showed that the regularly interstratified montmorill...

Pretreatment has been recognized as a key step in enzyme-based conversion processes of lignocellulose biomass to ethanol. The aim of this study is to evaluate two hydrothermal pretreatments (steam explosion and liquid hot water) to enhance ethanol production from poplar (Populus nigra) biomass by a simultaneous saccharification and fermentation (SSF) process. The composition of liquid and solid...

Rotor-like ZnO was grown from a mixture of rod-like ZnO powder and a saturated Zn(OH)(4)(2-) solution under moderate hydrothermal conditions at 100 degree C, in which the precursor rod-like ZnO crystal plane acts as a matrix core, and the branched nanorods showed fast epitaxial growth on the six directions around the prism core.

*Correspondence: Jalel Labidi , Chemical and Environmental Engineering Department, University of the Basque Country, Plaza Europa 1, San Sebastián 20018, Spain e-mail: [email protected] Organosolv lignin, obtained from olive tree pruning under optimized conditions, was subjected to a hydrothermal depolymerization process catalyzed by sodium hydroxide. The depolymerization of lignin was carrie...

The binary phase relations ofseveral naturally-occurring tungstats mins14ls, ofthe general form M2*WOae w€t€ investigated hydrothermally at fluid pressure of 1.0 kbar and temperatures of 400o-900oc. A complete solid solution, with tetragonal symmetry, between scheelite (M2* Ca) and Stolzite (Pb) forms above725"C. The solvus is alnost symmetrical with a crest near CaorPbrr. The observed linear v...

Pyruvate is an important "hub" metabolite that is a precursor for amino acids, sugars, cofactors, and lipids in extant metabolic networks. Pyruvate has been produced under simulated hydrothermal vent conditions from alkyl thiols and carbon monoxide in the presence of transition metal sulfides at 250 °C [Cody GD et al. (2000) Science 289(5483):1337-1340], so it is plausible that pyruvate was for...