The Environmental Remediation of Clark Island − A Former AlliedSignal Inc. Site

Clark Island is a 63 ha island located in Lake St-Francis, part of the St-Lawrence River, Québec, Canada. Since the early 40s the island has been used for the production of mineral acids by its fanner owner, Allied Chemicals Limited. Acidic wastes were placed over large portions of the island. The presence of these waste materials together with contaminated soils was identified as a potential threat to the nearby river water quality as well as to the underlying bedrock groundwater quality. A major remedial investigation and feasibility study was initiated in 1987. The approved scope of the remediation project included the construction of one 60,000 m3 single lined cell for the placement of contaminated soils, and one 130,000 m3 double lined cell for the placement of acidic wastes. The remediation project was implemented during the 1991-1993 period. In order to assess the efficiency of the remediation, a detailed environmental monitoring program was implemented during the works and in the following years. The general conclusion of this major project is that confining acidic wastes in lined cells provide a safe and economical way to avoid detrimental consequences to the environment

Измерение диаметра медной проволоки

В работе рассмотрены методы контроля диаметра медной проволоки. Выбран электропотенциальный метод, как наиболее простой и имеющий линейную функцию преобразования. Проведены экспериментальные исследования по изменению параметров электропотенциальный метод и выявлению наиболее подходящих для достижения максимальной точности измерения диаметра медной проволоки. Также в работе рассмотрена возможность определения наличия дефектов с помощью электропотенциального метода.In work methods of the control of diameter of a copper wire are considered. Electro-potential method is chosen, as the simplest and having a linear transformation function. Experimental studies have been carried out to change the parameters of the electro-potential method and to identify the most suitable for achieving the maximum accuracy of measuring the diameter of a copper wire. Also, the possibility of determining the presence of defects with the help of the electro-potential method is considered

Mechanism of cellular rejection in transplantation

The explosion of new discoveries in the field of immunology has provided new insights into mechanisms that promote an immune response directed against a transplanted organ. Central to the allograft response are T lymphocytes. This review summarizes the current literature on allorecognition, costimulation, memory T cells, T cell migration, and their role in both acute and chronic graft destruction. An in depth understanding of the cellular mechanisms that result in both acute and chronic allograft rejection will provide new strategies and targeted therapeutics capable of inducing long-lasting, allograft-specific tolerance

Analysis of arterial intimal hyperplasia: review and hypothesis

which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. Background: Despite a prodigious investment of funds, we cannot treat or prevent arteriosclerosis and restenosis, particularly its major pathology, arterial intimal hyperplasia. A cornerstone question lies behind all approaches to the disease: what causes the pathology? Hypothesis: I argue that the question itself is misplaced because it implies that intimal hyperplasia is a novel pathological phenomenon caused by new mechanisms. A simple inquiry into arterial morphology shows the opposite is true. The normal multi-layer cellular organization of the tunica intima is identical to that of diseased hyperplasia; it is the standard arterial system design in all placentals at least as large as rabbits, including humans. Formed initially as one-layer endothelium lining, this phenotype can either be maintained or differentiate into a normal multi-layer cellular lining, so striking in its resemblance to diseased hyperplasia that we have to name it "benign intimal hyperplasia". However, normal or "benign " intimal hyperplasia, although microscopically identical to pathology, is a controllable phenotype that rarely compromises blood supply. It is remarkable that each human heart has coronary arteries in which a single-layer endothelium differentiates earl

Thermal Infrared Imaging for Investigating Changes of Vasomotion in Peripheral Circulation

Background & aim: In 2017, WHO estimated 48.9 million incident cases of sepsis worldwide, with 11 million sepsis related deaths. In early stages of sepsis microcirculatory function is impaired. An expression for general microcirculatory function is vasomotion, which is possible to measure on the dorsal side of the hand using an infrared camera. Thus, the objective of this study is to assess if sympathetic stimulation changes vasomotion in the peripheral circulation. Method: To investigate changes in vasomotion, infrared recordings of the hand were obtained. A cold pressor test was conducted on 10 healthy subjects. From the infrared recordings, four areas of interest were selected on the thumb muscle, index, middle and ring finger, which were converted to signals, and decomposed using discrete wavelet transform. Specific details from the discrete wavelet transform were reconstructed to assess changes in vasomotion. Results: During the cold pressor test changes in vasomotion were observed. However, there were no significant changes in vasomotion (thumb $P=.237$, index $P=.219$, middle $P=.253$ and ring $P=.066$). Conclusion: The sympathetic stimulation resulted in change in microcirculatory activity in the hand, however it did not result in significant change in temperature oscillations in vasomotion frequency bands