Construction Innovation Futures - Industry and Environmental Opportunities.

During the next two decades global construction investment will top $100 trillion (US). New directions in construction innovation will be driven by industry to address challenges in skills, environmental regulations and maximise the benefits of low carbon building systems. Growth productivity catalysts such as offsite construction, higher BIM levels and multi-skill operatives will be instrumental contributors in achieving some of these aims. The increasing use of timber architecture across domestic, public and commercial buildings also opens new pathways. This event will discuss some of the key changes taking place in the UK and parallels with Hong Kong’s ambitions towards delivering a sustainable legacy in this sector.

The Amplifier - v. 12, no. 2

In this issue...Library Building, Mineral Museum, Daylight Savings Time, Pete Knudson, Finlen Hotel, Homecoming, Vending Machines, Veterans' Day

The Amplifier - v. 16, no. 3

In this issue...Library, Registration, Ugly Man Contest, Don Heater, Miners Bank, Copper Bowl, Abortion Legalization, AWS Convention, Student Council, Copper Lounge

Chamber investigations of atmospheric mercury oxidation chemistry

Mercury is a potent neurotoxin even at low concentrations. The unoxidised metal has a high vapour pressure and can circulate through the atmosphere, but when oxidised can deposit and be accumulated through the food chain. This work aims to investigate the oxidation processes of atmospheric Hg0(g). The first part describes efforts to make a portable Hg sensor based on Cavity Enhanced Absorption Spectroscopy (CEAS). The detection limit achieved was 66 ngm−3 for a 10 second averaging time. The second part of this work describes experiments carried out in a temperature controlled atmospheric simulation chamber in the Desert Research Institute, Reno, Nevada, USA. The chamber was built around an existing Hg CRDS system that could measure Hg concentrations in the chamber of<100 ngm−3 at 1 Hz enabling reactions to be followed. The main oxidant studied was bromine, which was quantified with a LED based CEAS system across the chamber. Hg oxidation in the chamber was found to be mostly too slow for current models to explain. A seven reaction model was developed and tested to find which parameters were capable of explaining the deviation. The model was overdetermined and no unique solution could be found. The most likely possibility was that the first oxidation step Hg + Br →HgBr was slower than the preferred literature value by a factor of two. However, if the more uncertain data at low [Br2] was included then the only parameter that could explain the experiments was a fast, temperature independent dissociation of HgBr some hundreds of times faster than predicted thermolysis or photolysis rates. Overall this work concluded that to quantitatively understand the reaction of Hg with Br2, the intermediates HgBr and Br must be measured. This conclusion will help to guide the planning of future studies of atmospheric Hg chemistry.

Trade and Commerce in Cleobury Mortimer.

Report by Centre for Rural Research. Commissioned by Cleobury Mortimer Chamber of Trade.

In vitro penetration of bleaching agents into the pulp chamber

Aim: To investigate pulp chamber penetration of bleaching agents in teeth following restorative procedures. Methodology: Bovine lateral incisors were sectioned 3 mm apical to the cemento-enamel junction and the coronal pulpal tissue was removed. Teeth were divided into six groups (n = 10): G1, G2 and G3 were not submitted to any restorative procedure, while G4, G5 and G6 were submitted to Class V preparations and restored with composite resin. Acetate buffer was placed in the pulp chamber and treatment agents were applied for 60 min at 37°C as follows: G1 and G4, immersion into distilled water; G2 and G5, 10% carbamide peroxide (CP) exposure; G3 and G6, 35% CP bleaching. The buffer solution was removed and transferred to a glass tube where leuco crystal violet and horseradish peroxidase were added, producing a blue solution. The optical density of the blue solution was determined spectrophotometrically at 596 nm. A standard curve made with known amounts of hydrogen peroxide was used to convert the optical density values of the coloured samples into microgram equivalents of hydrogen peroxide. Data were submitted to ANOVA and Tukey's test (5%). Results: Amounts of hydrogen peroxide found in the pulp chamber of G2 and G5 specimens (0.1833 ± 0.2003 μg) were significantly lower (P = 0.001) when compared to G3 and G6 specimens (0.4604 ± 0.3981 μg). Restored teeth held significantly higher (P = 0.001) hydrogen peroxide concentrations in the pulp chamber than intact teeth. Conclusion: Higher concentrations of the bleaching agent produced higher levels of hydrogen peroxide in the pulp chamber, especially in restored teeth.

Translations of the Ottoman constitutional laws: the Wilayet Administrative Law, the Municipal Law and various other laws

Ottoman constitutional law of the 7th Dhil Hujjah, 1293 AH [December 24, 1876 AD] as amended. -- Regulations of the Chamber of deputies. -- Regulations of the Senate. -- Provisional law of administration of wilayets of the 13th March, 1329 AH [March 26, 1913 AD] as amended. -- Municipal law of the 27th Ramadhan, 1294 AH [October 5, 1877 AD] as amended. -- Law regulating chambers of commerce and industry, dated the 31st May, 1326 AH [June 13, 1910 AD]. -- Provisional law of expropriation on behalf of municipalities dated the 21st Kanun Thani, 1329 AH [February 3, 1914 AD]. -- Regulations of expropriation for public purposes, dated the 24th Tashrin Thani, 1295 AH [December 6, 1879 AD] as amended. -- The Press law of the 16th Tamuz, 1325 AH [July 29, 1910 AD] as amended.

Collected papers - University of Adelaide.

Mode of access: Internet.

Settlement of the Dollar Line case. A report by the Secretary of the Commerce to the President of the United States, December 1952.

Mode of access: Internet.

Reorganization plan no. 5 of 1950 : providing for reorganizations in the Department of the Commerce : report, together with the individual views ... (to accompany S. Res. 259)

Also in Congressional serial volume 11368.

Foreign commerce and navigation of the United States ...

The statistics of "Immigration and passenger movement" are included in the report on foreign commerce to 1895, and for 1893-1894 are also published separately.

Commerce, Justice, science, and related agencies appropriations for 2012 : hearings before a subcommittee of the Committee on Appropriations, House of Representatives, One Hundred Twelfth Congress, first session /

Shipping list number: 2011-0317-P (pt. 2A), 2011-0318-P (pt. 2B), 2011-0285-P (pt. 3, 4), 2011--0325-P (pt. 5), 2011-0410-P (pt. 6), 2012-0013-P (pt. 7), 2011-0383-P (pt. 8), 2011-0295-P (pt. 9).

The Foreign commerce and navigation of the United States for the year ending ... /

Prepared by the Foreign Trade Division, 1941-