Uncoated surfaces of high index glasses when cemented to form lens doublets have inferior antireflection properties to doublets of low index glass. This can be overcome by the application of a single layer coating of aluminum oxide prior to cementing.

Aiming at the problem of cement ring sealing failure during deep high temperature shale gas exploitation, comprehensively considering influence characteristics multi-cluster fracturing multiple horizontal wells and formation temperature, cementing southwest region is taken as research object. After exposure to different temperatures (95?C 135?C) for times (5, 10, 20 times), axial triaxial tests...

Keratins are the characteristic structural proteins of the highly cornified epidermis of the skin, feathers, and hoof. Keratin proteins provide the structural basis for the unique properties of the biomaterial horn and its protective function against a wide range of environmental factors. Hoof horn is produced through a complex process of differentiation (keratinization) of epidermal cells. For...

ement integrity achieved in the Gulf of Mexico Marco Polo development in Green Canyon block 608 is putting innovative slurry systems on the map of sought-after technologies for deepwater plays. These new slurries help reduce the known risk of shallow flow and combat possible formation of gas hydrates. While Anadarko considered conventional foamed slurries in the planning phase of this 20-in. co...

Havelin LI, Espehaug B, Vollset SE, Engesaeter LB The effect of the type of cement on early revision of Charnley total hip prostheses. A review of eight thousand five hundred and seventy-nine primary arthroplasties from the Norwegian Arthroplasty Register. J Bone Joint Surg Am 1995 Oct;77(10):1543-50 http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=7593063&dopt=Abs...

In this study, ground granulated blast-furnace slag (GGBFS) samples from Singapore, Korea, and the United Arab Emirates were hydrated with purified water to estimate the cementing capabilities without activators. Raw GGBFS samples and hardened pastes were characterized to provide rational explanations for the strengths and hydration products. The slag characteristics that influenced the best st...

The cementing efficiency factor k of a pozzolan is defined as the number of parts of cement in a concrete mixture that could be replaced by one part of pozzolan without changing the property being investigated, which is usually the compressive strength. This concept was proposed by Smith [1] and was initially applied in rational proportioning of fly ash concrete by using the ‘‘fly ash cementing...

We performed 83 consecutive cemented revision total hip arthroplasties in 77 patients between 1977 and 1983 using improved cementing techniques. One patient (two hips) was lost to follow-up. The remaining 76 patients (81 hips) had an average age at revision of 63.7 years (23 to 89). At the final follow-up 18 hips (22%) had had a reoperation, two (2.5%) for sepsis, three (4%) for dislocation and...