Experimental Chemistry (Sienko, Michell J.)

John Michell Clarke

Michell Trusses and Lines of Principal Action

We study the problem of Michell trusses when the system of applied equilibrated forces is a vector measure with compact support. We introduce a class of stress tensors which can be written as a superposition of rank-one tensors carried by curves (lines of principal strains). Optimality conditions are given for such families showing in particular that optimal stress tensors are carried by mutual...

Trends in Analytical Chemistry, doi:10.1016/j

We report on a Communication of the European Commission to the Council and the European Parliament in 2002, entitled ‘‘Towards a Thematic Strategy for Soil Protection’’, an operational framework for its implementation and an indicator approach, as a basis for the elaboration of priority research areas for soil protection and the management of Europe’s natural resources. From this, we draw the c...

Totally Transanal Laparo-Endoscopic Single-Site ProctoColectomy-Ileoanal J-Pouch (TLPC-J): An Experimental Study of a Novel Approach

Background: The natural orifice transluminal endoscopic surgery (NOTES) has become a commonly considered novel approach in the surgical field. The NOTES provide possibility of operation through the natural orifice and decreases the intentional puncture of the systemic organ and subsequent complications. Totally transanal laparo-endoscopic single-site proctoColectomy-Ileoanal J-Pouch (TLPC-J) is...

Experimental Techniques for Studying Surface Chemistry in Smog Chambers

Chemical reactions occurring on the walls of environmental chambers provide a large fraction of the radical species which initiate gas phase smog chemistry, but the nature and magnitude of these processes have not received focused attention. For example, the empirical models used in conjunction with the UNC and Riverside smog chambers contain different reaction schemes and product distributions...