This study assesses the prospectivity of world’s oldest known stacked petroleum systems from Proterozoic greater McArthur Basin (Northern Territory, Australia), which has immense potential to host both conventional natural gas and oil, in addition shale-gas accumulations. The Mesoproterozoic succession Beetaloo Sub-basin surrounding region hosts Territory’s premier play is at an advanced stage ...

Helium was first solidified at the famous Kamerlingh Onnes low-temperature physics laboratories in Leiden by W. H. Keesom [1] on June 25, 1926. The initial experiments by Sir Francis Simon at Oxford University and by Keesom and their collaborators focused on the melting curve, the specific heat, and the thermal conductivity of solid helium as a test of our early understanding of solids. These m...

Neutron time-of-flight measurements of the dynamic structure factor S(Q ,v) of both normal liquid and superfluid He are presented. Using the MARI spectrometer at the ISIS pulsed neutron source ~U.K.!, S(Q ,v) was measured over continuous ranges in wave vector Q up to 10 Å at a temperature of 1.42 K, while at T52.5 K the range extended up to Q517 Å. The quality of the data represents a significa...

OBJECTIVE The objective of this study was to compare the smear layer formed on root canal walls during canal preparation of extracted human teeth by Twisted, Mtwo, and ProTaper rotary nickel titanium instruments. MATERIALS AND METHODS Sixty single rooted human premolar teeth with root curvature <25(0) were selected and randomly divided into three Groups (n= 20 teeth per Group). Three types of...

Since the discovery by Beck, Vartuli et al.[1, 2] that ordered mesoporous silicas, such as MCM-41, can be obtained by surfactant templating, the development of new porous materials and porogens as well as the characterization of the resulting structures has become one of the most promising fields in modern materials chemistry.[3±5] Meanwhile, these observations have been extended to a number of...

316 Ó WILEY-VCH Verlag GmbH, D-69469 Weinheim, 1998 0935-9648/98/0403-0316 $ 17.50+.50/0 Adv. Mater. 1998, 3, No. 4 [5] a) A. D. Firouzi, D. Kumar, L. M. Bull, T. Besier, P. Sieger, Q. Huo, S. A. Walker, J. A. Zasadzinski, C. Glinka, J. Nicol, D. Margolese, G. D. Stucky, B. F. Chmelka, Science 1995, 267, 1138. b) A. Monnier, F. Schüth, Q. Huo, D. Kumar, D. Margolese, R. S. Maxwell, G. D. Stucky...

We present inelastic neutron scattering measurements of the dynamics of helium adsorbed on carbon nanotube bundles. The goal is to determine the vibrational properties of the 1D and 2D quantum solids that are stabilized on the nanotube bundle surfaces at different fillings of He. The mean square vibrational amplitude in the 1D solid is large with a Lindemann ratio of γ1D = (〈u〉)/a1 = 0.25 compa...

There have been several investigations on the synthesis of inorganics in molecular assemblies such as reverse micelles,1-4 LB films,5 vesicles,5 and block copolymers.6 Synthetic methodologies are also known for the formation of mesoporous materials7,8 based on the coassembly of surfactants and ionic species. After calcination these lead to the formation of mesoporous oxides9-11 or nonoxides suc...