Сенсорные электроды на основе наночастиц диоксида марганца
Диссертация
Экспресс-методы анализа ингибиторов холинэстераз основаны на измерении активности ферментов АХЭ и БХЭ до и после контакта с пробой, потенциально содержащей ингибитор. Показателем активности данных ферментов является скорость гидролиза их природных и синтетических субстратов. Природными субстратами холинэстераз являются холиновые эфиры, их гидролиз приводит к образованию холина. В качестве… Читать ещё >
Содержание
- 1. ОБЗОР ЛИТЕРАТУРЫ
- 1. 1. Структура, свойства и роль холинэстераз в организме
- 1. 2. Ингибиторы холинэстераз
- 1. 3. Методы анализа ингибиторов холинэстераз
- 1. 4. Амперометрические системы регистрации тиохолина
- 1. 5. Амперометрические системы регистрации пероксида водорода и холина
- 1. 5. 1. Фермент холиноксидаза, структура и свойства
- 1. 5. 2. Холиноксидазные электрохимические сенсоры
- 1. 5. 2. 1. Электрохимическая регистрация пероксида водорода
- 1. 5. 2. 2. Иммобилизация холиноксидазы и анализ холина
- 1. 6. Методы получения и стабилизации наночастиц для формирования медиаторных покрытий
- 1. 6. 1. Методы получения наночастиц
- 1. 6. 2. Стабилизация золей наночастиц
- 1. 7. Диоксид марганца как медиатор для электрохимического анализа
- 1. 7. 1. Структура и свойства диоксида марганца
- 1. 7. 2. Синтез и стабилизация наночастиц диоксида марганца
- 1. 7. 3. Электрохимические сенсоры на основе диоксида марганца
- 2. 1. Материалы
- 2. 2. Методы
- 2. 2. 1. Получение наночастиц МпОг для формирования медиаторных покрытий
- 2. 2. 1. 1. Получение наночастиц диоксида марганца в обращенных мицеллах
- 2. 2. 1. 2. Получение наночастиц МпОг в гидротермальных условиях
- 2. 2. 1. 3. Получение у — диоксида марганца
- 2. 2. 1. 4. Получение водных золей аморфного и (З-МпОг
- 2. 2. 2. Физико-химические методы характеристики наночастиц МпОг
- 2. 2. 2. 1. Рентгеновская дифракция
- 2. 2. 2. 2. Просвечивающая электронная микроскопия
- 2. 2. 2. 3. Сканирующая электронная микроскопия
- 2. 2. 2. 4. Измерение концентрации и распределения частиц гидрозолей аморфного, (3- и у-Мп02 по размерам
- 2. 2. 2. 5. Спектрофотометрические исследования водных золей Мп
- 2. 2. 2. 6. Квазиупругое динамическое светорассеяние
- 2. 2. 2. 7. Определение дзетта-потенциала наночастиц у — Мп
- 2. 2. 3. Изготовление электродов на основе наночастиц Мп
- 2. 2. 3. 1. Модификация графитовых стержней наночастицами
- 2. 2. 1. Получение наночастиц МпОг для формирования медиаторных покрытий
- 2. 2. 3. 2. Модификация планарных графитовых электродов водными золями наночастиц Мп
- 2. 2. 3. 3. Сканирующая электронная микроскопия поверхности электродов
- 2. 2. 3. 4. Изготовление холиноксидазных биосенсоров методом послойного нанесения полиэлектролитов
- 2. 2. 3. 5. Изготовление холиноксидазных электродов методом иммобилизации фермента в пленке с поли (4-винилпирилином)
- 2. 2. 4. Электрохимические характеристики электродов
- 2. 2. 4. 1. Вольтамперометрия
- 2. 2. 4. 2. Анализ пероксида водорода, холина и тиохолина
- 2. 2. 5. Анализ холинэстеразной активности и ингибиторов холинэстераз
- 2. 2. 5. 1. Электрохимическое определение активности бутерилхолинэстеразы с использованием холиноксидазных электродов '
- 2. 2. 5. 2. Электрохимический анализ активности БХЭ с использованием серосодержащих субстратов
- 2. 2. 5. 3. Электрохимический анализ ингибиторов холинэстеразной активности с использованием холиноксидазных электродов
- 2. 2. 5. 4. Определение нейротоксичности проб сине-зеленых водорослей? ^
- 2. 2. 5. 5. Электрохимический анализ ингибиторов холинэстеразной активности с использованием серосодержащих субстратов
- 2. 2. 5. 6. Анализ тиохолина и диазинона без перемешивания
- 3. 1. Исследование электрохимических свойств наночастиц диоксида марганца,
- 3. 1. 1. Синтез наночастиц МпОг в обращенных мицеллах и их характеристика
- 3. 1. 2. Изготовление и характеристика пероксид-чувствительных электродов на основе наночастиц М11О2. полученных в обращенных мицеллах
- 3. 1. 2. 1. Оптимизация процедуры нанесения медиатора
- 3. 1. 2. 2. Вольтамперометрические характеристики электродов
- 3. 1. 2. 3. Операционная и долговременная стабильнбость электродов
- 3. 1. 3. Анализ пероксида водророда при помощи электродов на основе наночастиц МпОг полученными в обращенных мицеллах
- 3. 1. 3. 1. Влияние рабочего потенциала
- 3. 1. 3. 2. Влияние ионной силы рабочего буфера
- 3. 1. 3. 3. Интерферирующее влияние различных веществ на электрохимический анализ пероксида водорода
- 3. 1. 3. 4. Градуировочная зависимость по Н2О2 и аналитические характеристики электродов
- 3. 1. 4. Холиноксидазные электроды на основе наночастиц диоксида марганца, полученных в обращенных мицеллах
- 3. 2. Исследование медиаторных свойств гидрозолей диоксида марганца для анализа пероксида водорода и тиохолина
- 3. 2. 1. Получение и физико-химические характеристики гидрозолей наночастиц диоксида марганца
- 3. 2. 1. 1. Гидрозоль наночастиц у-МпОг
- 3. 2. 1. 2. Гидрозоли аморфного и Р-М1Ю
- 3. 2. 2. Исследование электрохимических свойств наночастиц М11О2 в реакции электроокисления тиохолина
- 3. 2. 3. Исследование электрохимических свойств наночастиц МпОг в реакции электроокисления пероксида водорода
- 3. 2. 4. Оптимизация и характеристика электродов на основе наночастиц у-МпОг
- 3. 2. 4. 1. Анализ пероксида водорода
- 3. 2. 4. 2. Анализ тиолов
- 3. 2. 1. Получение и физико-химические характеристики гидрозолей наночастиц диоксида марганца
- 3. 3. 1. Оптимизация методики изготовления холиноксидазных электродов и анализа хо лина ^
- 3. 3. 1. 1. Оптимизация концентрации фермента при адсорбции
- 3. 3. 1. 2. Операционная стабильность холиноксидазных электродов
- 3. 3. 1. 3. Исследование влияния числа слоев холиноксидазы на аналитические характеристики электродов ]
- 3. 3. 2. Определение кинетических параметров иммобилизованной холиноксидазы
- 3. 3. 3. Аналитические характеристики холиноксидазных электродов
- 3. 3. 4. Влияние интерферирующих компонентов биологических жидкостей и экологических образцов на анализ холина !
- 3. 4. 1. Анализ активности БХЭ при помощи холиноксидазных электродов
- 3. 4. 2. Анализ активности БХЭ с использованием серосодержащих субстратов
- 3. 4. 2. 1. Оптимизация времени проведения реакции ферментативного гидролиза ПТХ и концентрации субстрата
- 3. 4. 2. 2. Измерение активности БХЭ в режиме накопления продукта и в кинетическом режиме
- 3. 4. 3. Анализ ингибиторов холинэстераз при помощи холиноксидазных электродов
- 3. 4. 3. 1. Анализ хлорпирифоса, диазинона, диизопропилфторфосфата и карбофурана в кинетическом режиме
- 3. 4. 3. 2. Анализ нейротоксичности проб сине-зелёных водорослей
- 3. 4. 4. Анализ ингибиторов холинэстераз с использованием серосодержащих субстратов
- 3. 4. 4. 1. Анализ диазинона в режиме измерения накопленного продукта и кинетическом режиме
- 3. 4. 4. 2. Анализ тиохолина и диазинона без перемешивания
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