Предварительная проверка микробиологических испытаний
Цена: 3 111руб. (¥173)
Артикул: 629425457811
Вес товара: ~0.7 кг. Указан усредненный вес, который может отличаться от фактического. Не включен в цену, оплачивается при получении.
Описание товараПродавец:经济图书专营店
Адрес:Пекин
Рейтинг:
Всего отзывов:0
Положительных:0
Добавить в корзину
Другие товары этого продавца
¥3656 538руб.
¥2203 956руб.
¥2274 082руб.
¥148626 422руб.
Основная информация
Номер книги: 9781792683909
Автор: Национальная аэронавтика и космическая ADM NASA
Версия:
Publishing House: Amazon Digital Services LLC -KDP Печать нас
Дата публикации: 2018/12/28
Английский язык
Количество страниц: 30
краткое введение
Microbiological samples were collected from the recycle tank of the vapor compression distillation (VCD) subsystem of the water recovery test at NASA MSFC following a 68-day run. The recycle tank collects rejected urine brine that was pretreated with a commercially available oxidant (Oxone) and sulfuric acid and pumps it back to the processing component of the VCD. Samples collected included a water sample and two swab samples, one from the particulate filter surface and a second from material floating on the surface of the water. No bacteria were recovered from the water sample. Both swab samples contained a spore-forming bacterium, Bacillus insolitus. A filamentous fungus was isolated from the floating material. Approximately 1 month after the pretreatment chemicals were changed to sodium hypochlorite and sulfuric acid, a swab of the particulate filter was again analyzed for microbial content. One fungus was isolated, and spore-forming bacteria were observed. These results indicate the inability of these pretreatments to inhibit surface attachment. The implications of the presence of these organisms are discussed. Huff, Tim NASA-CR-192570, NAS 1.26:192570 NAS8-37814...