CCVD synthesis of carbon nanotubes with W/Co–MgO catalysts.

Carbon nanotubes (CNT) were synthesized from a H2–CH4 mixture with W/Co–MgO catalyst by a catalytic chemical vapour deposition (CCVD) method. Different W/Co ratios were investigated. From transmission electron microscopy observations, we observed that both the number of walls and the diameter of CNT increased with the proportion of tungsten. A promoter effect was observed as long as the proportion of tungsten was kept low and CNT with a number of walls ranging from 2 to 5 were obtained. With a higher proportion of tungsten, multi-walled carbon nanotubes (MWNT) up to 10 walls were synthesised, together with additional undesirable carbon nanofibres

Assessment of the potential in vivo ecotoxicity of Double-Walled Carbon Nanotubes (DWNTs) in water, using the amphibian Ambystoma mexicanum

Because of their specific properties (mechanical, electrical, etc), carbon nanotubes (CNTs) are being assessed for inclusion in many manufactured products. Due to their massive production and number of potential applications, the impact of CNTs on the environment must be taken into consideration. The present investigation evaluates the ecotoxic potential of CNTs in the amphibian larvae (Ambystoma mexicanum). Acute toxicity and genotoxicity were analysed after 12 days of exposure in laboratory conditions. The genotoxic effects were analysed by scoring the micronucleated erythrocytes in the circulating blood of the larvae according to the French standard micronucleus assay. The results obtained in the present study demonstrated that CNTs are neither acutely toxic nor genotoxic to larvae whatever the CNTs concentration in the water, although black masses of CNTs were observed inside the gut. In the increasing economical context of CNTs, complementary studies must be undertaken, especially including mechanistic and environmental investigations

Учебникъ физiологiи человека со включенiемъ гистологии и микроскопической анатомiи и въ примененiи къ практической медицине

Авторъ тщательно просмотрѣлъ всѣ отдѣлы книги и дополнилъ ихъ результатами новѣйшихъ изслѣдованій. Рисунки частью пополнены новыми, частью замѣнены лучшими. Всѣ изданія, которыя выдержала книга автора въ подлинникѣ, и переводы ея на разныя языки окончательно убѣдили его въ вѣрности плана, по которому авторъ работалъ, какъ авторъ и какъ преподаватель. Физіологія есть основа внутренней медицины; ее необходимо поэтому преподавать такъ, чтобы врачъ находилъ въ ней опору для своей дѣятельности. Таково было стремленіе автора; въ этомъ же смыслѣ книга обработана и въ настоящемъ изданіи

Lehrbuch der Physiologie des Menschen : einschliesslich der Histologie und mikroskopischen Anatomie mit besonderer Berücksichtigung der praktischen Medicin /

Includes index.Mode of access: Internet

Lehrbuch der Physiologie des menschen Einschliesslich der Histologie und mikroskopischen Anatomie mit besonderer Berücksichtigung der praktischen Medicin.

Mode of access: Internet

A manual of human physiology, including histology and microscopical anatomy, with special reference to the requirements of practical medicine

v.