Ce-containing MCM-41 mesoporous materials with large surface area and ordered pore structure system have been possible to be synthesized through a surfactant-assisted approach. The textural properties and structural regularity of the materials varied with the Si/Ce molar ratio. It is found that the band at 970 cm-1 in the FTIR spectrum of the Ce-MCM-41 mesoporous materials might be used as an indicator of the formation of the Ce-O-Si bond and its intensity as a measure of a degree of cerium ion substitution in the framework of Si-MCM-41. When Ni was loaded on the Ce-MCM-41 support, the Ni/Ce-MCM-41 catalysts show high catalytic activity which has strong temperature dependence. The methane conversion over these catalysts reached 60-75 % with a 100 % selectivity towards hydrogen.

HIV infection has been associated with decline in a number of cognitive functions that are components of ‘working memory’. Thus, tests of working memory that require the interaction of these components may be particularly sensitive to cognitive dysfunction that arises from HIV infection. To assess this possibility, working memory was examined in 147 HIV-seropositive (HIV+) and 38 HIV-seronegative (HIV−) males using the Reading Span Test and the Digit Span subtest from the Wechsler Memory Scale-Revised (WMS-R). Speed of information processing, a component of some working memory tasks, was assessed with a version of the Sternberg Memory Scanning task. Results indicated that symptomatic HIV+ subjects were impaired relative to HIV− control subjects on the Reading Span and Digit Span tests. Asymptomatic and mildly symptomatic HIV+ groups exhibited a trend toward impairment on these tests, and on the whole, a greater proportion of HIV+ subjects than HIV− subjects were impaired. The groups did not differ significantly in information processing speed. These results indicate that deficits in working memory are apparent in at least a subset of HIV-infected individuals. These deficits are most apparent in symptomatic HIV+ individuals, but the decline may begin during the asymptomatic phase of infection.

To determine the occupational significance of tick-borne zoonoses we sought serological evidence of Lyme borreliosis, human monocytic ehrlichiosis (HME) and human granulocytic ehrlichiosis (HGE) in a representative sample of farmworkers. Although around 20% reported ticks on their domestic and companion animals, few (<2% per year) reported being bitten by ticks. Seroprevalence of Lyme borreliosis (0·2%), HME (0·2%) and HGE (1·5%) was low. Those seropositive for HGE were no more likely to report tick bites nor more likely to report ticks on their animals. This study provides evidence that farmworkers in England are exposed to tick-borne zoonoses but that they are uncommon. Since the severity of these diseases is linked to delays in diagnosis and treatment, clinicians should be aware of these diagnoses in patients from rural communities, with or without a self-reported history of tick bite.

Henrion de Pansey (1742–1829) is an important but neglected constitutional historian whose views on the French past served as a commentary on the unwritten and written constitutions of his own age. A feudal lawyer before the revolution and an appeal judge under Napoleon and the restored Bourbons, he published a variety of works combining liberal sentiment with judicial traditionalism. His career illustrates the shift of moderate conservative opinion across the revolutionary divide. The alteration in his political thought is best understood through its conjunction with the three historical modes prevalent in his time: a discontinuous approach, accepting the past as a series of different regimes interrupted by revolutions; a developmental view, charting the progressive growth of institutions from seeds planted in antiquity; and a fundamentalist habit of thought that saw change as decline from pristine perfection. The jurists of sixteenth-century France remained Henrion's most admired models, and he used his roseate vision of the early modern French monarchy as a sometimes critical commentary on the constitutions designed in his own day. In prerevolutionary days he recast the ideas of the sixteenth-century rationalizer of feudalism, Charles Dumoulin, into Enlightenment terms. After the revolution, De l'Autoritéjudiciaire (1810) depicted the moderating role of the judiciary as defenders of past constitutions, and formed an oblique commentary on Napoleon's civil code. Des Pairs et de l'ancienne constitution (1816) appraised the charter of 1814. It accepted a measure of popular participation in government, but held judicial expertise essential in legislation. Des Assemblées nationales (1826) shifted the emphasis from judicial oversight to the separation of powers and representative government, although Henrion, like Guizot and the doctrinaires, remained critical of popular democracy.

A strong case has been made for the appearance of a new kind of history in late sixteenth-century France. Whether or not it deserves the label ‘historicist’, it has been credited with a desire to discover the objective face of the past, with a critical approach to sources, and even, though more rarely, with attempts to explain historical process. Prominent among the new brand of historians are Jean du Tillet, Charles du Moulin, Pierre and François Pithou, Claude Fauchet and Etienne Pasquier. All these men of the robe are also celebrated as defenders of the liberties of the Gallican Church. The Gallican tradition shared an attitude towards the past that was quite contrary to the new history. It did not accept change for its own sake, nor did it see change as improvement pointing towards the present.