The refinement of the crystal structure of Theigarhorn epistilbite showed the presence of two tetrahedral configurations, as in Elba dachiardite. These two configurations, obtained by the rotation of two tetrahedra around one edge, have both C2 symmetry, with different frequency (82% and 18% respectively), thus the resulting space group is C2. The presence of these two acentric domains is inter...

The dissociation of diacetyl dilute in krypton has been studied in a shock tube using laser schlieren densitometry at 1200-1800 K and reaction pressures of 55 +/- 2, 120 +/- 3, and 225 +/- 5 Torr. The experimentally determined rate coefficients show falloff and an ab initio/Master Equation/VRC-TST analysis was used to determine pressure-dependent rate coefficient expressions that are in good ag...

Introduction: With the increase in mobile phone usage in public places, the use of mobile phone jammer has also increased therefore, the aim of this study was to evaluate the effects of mobile phone jammer on the level of anxiety in mice. Methods: Forty male and 40 female naive mice (25-30 g) were randomly divided into four groups (control, 900 MHz, 1800 MHz and 900+1800 MHz exposures). Ani...

The goal of the present study was to determine whether there were HIV-1 specific cellular immune responses among a subgroup of women within a cohort of Nairobi prostitutes (n = 1800) who, despite their intense sexual exposure to HIV-1, are epidemiologically resistant to HIV-1 infection. Of the 80 women defined to be resistant, 24 were recruited for immunological evaluation. The HIV-1-specific T...

The influence of some effective parameters on the removal efficiency of a 500 liters UASB reactor was investigated. The best conditions to removal the pollution loading is pH=7 and temperature range of 35 to 38°C. The optimal of hydraulic retention time in medium COD amounts (800-1800 mg), is 5 h and in the high COD load (1800-2600 mg) is 6 h. Furthermore, the hydraulic rate is between 0.67-0.8...

The history of the New Zealand biota over the last 7000 years may be divided into three phases. BC 5000 to AD 1000 was a period of comparative ecological stasis. That equilibrium was disrupted between AD 1000 and AD 1800 by the destruction of most of the New Zealand plant-herbivore systems, the co-evolutionary relationship between the plants and the vertebrate herbivores being decoupled by abou...

1.Current Ecological and Social Problems in South America 1.1. Antagonism between Conservation and Development 1.2. The Blindness of Macroeconomic Parameters 2.Diversity and Homogenization in Southern South America since European Colonization 2.1. Three Waves of Eco-Cultural Homogenization: The Case of Southern Chile 2.1.1. European Conquerors (1500–1800) 2.1.2. Independence and Modernization (...

Short wavelength operation (1650-1800 nm) of silica-based thulium-doped fiber amplifiers (TDFAs) is investigated. We report the first demonstration of in-band diode-pumped silica-based TDFAs working in the 1700-1800 nm waveband. Up to 29 dB of small-signal gain is achieved in this spectral region, with an operation wavelength accessible by diode pumping as short as 1710 nm. Further gain extensi...

1 Using rare surnames we follow the socioeconomic status of initial groups of rich, middling, and poor in England from 1800 until 2011. We measure social status through wealth at death, education, and average age at death. Our method allows unbiased estimates of mobility rates. Mobility rates are much lower than conventionally estimated, even for recent generations. There is considerable persis...

Understanding the connections between magnetism and electricity and exploiting that understanding for technological innovation dominated science in the nineteenth century, and yet no one saw it coming. In the index to Butterfield’s classic history of the scientific revolution [3], which he locates roughly from 1300 to 1800, the word “electricity” does not appear. Nobody in 1800 could have imagi...