Online ISSN: 2515-8260

Keywords : atmospheric air


DEVELOPMENT OF SELECTIVE SENSORS FOR DETERMINATION OF ETHYL ALCOHOL VAPORS

Ergashboy Abdurakhmanov; Zulfiya Begmuradovna Murodova; Farrukh Fakhriddinovich Kholmurzaev; Bakhtiyor Bakhodir ugli Akhmedov

European Journal of Molecular & Clinical Medicine, 2020, Volume 7, Issue 9, Pages 2769-2779

The paper establishes the regularities of the oxidation of combustible substances in the presence of catalytic systems of different nature and on their basis the catalysts for measuring and compensation sensitive elements of a thermocatalytic ethanol vapor sensor are selected. The possibility of creating highly sensitive and selective sensors with the use of measuring and compensating thermosensitive elements of the sensor containing catalysts of different activity to the components of complex gas-air mixtures has been experimentally confirmed.The main metrological characteristics and operational parameters of the developed selective thermocatalytic ethanol sensors are estimated. The developed utensils allow the determination of ethyl alcohol vapors in wide ranges of its concentrations and have the best metrological characteristics and operational parameters.

STUDY IN THE EXPERIMENT OF THE NATURE OF THE BIOLOGICAL RESPONSE OF THE ORGANISM AT SIMULTANEOUS AEROGENIC AND ORAL INTAKE OF LEAD AND DEVELOPMENT OF ITS PERMISSIBLE VALUES IN THE AIR, WATER AND FOOD PRODUCTS

Mirzakarimova Malohat .; Kamiljanov Abduvakhit .; Adilov Utkir .; Dinora Khashirbaeva .; Sagdullaeva Barno .

European Journal of Molecular & Clinical Medicine, 2020, Volume 7, Issue 2, Pages 2823-2835

Lead and its compounds are continuously detected in environmental objects at
various concentrations and doses. Lead is a general plasma poison that affects the nervous,
bone, endocrine system, blood and blood vessels, parenchymatous organs, gastrointestinal
tract, metabolism, reproductive function, immune status and resistance. In this regard, there
is an acute need to study in the experiment features of the response of the body of rats at
the same time aerogenic and oral intake of lead and the development of its permissible
values in the air, water and food products, taking into account the complex effects.
Objective: to determine experimentally the peculiarities of biological response of
experimental animals at simultaneous aerogenic complex intake of lead and development
of its permissible values in air, water and food products.
Methods: Concentration (dose) - time-effect relationship was used. For inhalation,
200-liter chambers were used in the experiment, proposed by B.A. Kurlyandsky. Modern
highly sensitive biochemical, physiological, gonad and embryotoxic indicators were used
to assess the resorptive toxic effect of lead.