scholarly journals Microbiological air analysis of industrial premises and photocatalysis efficiency for its disinfection

2020 ◽  
Vol 17 ◽  
pp. 00126
Author(s):  
V.S. Shkrabak ◽  
E.V. Zhgulev ◽  
E.I. Gavrikova ◽  
R.V. Shkrabak
Keyword(s):  
Antibacterial Agents ◽  
Microbial Contamination ◽  
Original Method ◽  
Morbidity Rate ◽  
Industrial Complex ◽  
Air Analysis ◽  
Photodynamic Treatment ◽  
Basic Difference ◽  
Air Contamination ◽  
Survival Potential

This article analyzes the reasons of temporary disability of laborers in Agro Industrial Complex, dealing with microbial content in industrial premises. Development and implementation of equipment for correction of microbial content level results in reduction of general morbidity rate and duration of temporary disability among laborers in Agro Industrial Complex. It will help to increase labor efficiency and decrease labor intensity of production. Biofilm resistance against antibacterial agents is a vital problem during disinfection treatments. Increase in bacteria survival potential and reduction in sensitivity to the substances eliminating them, results in need for increased dosing of the latter decreased efficiency of sanitation. This is a stimulus to develop alternative antibacterial compositions and methods of disinfection treatment. The basic difference of the suggested photodynamic treatment from the disinfection methods with application of antimicrobial preparations is the lack of resistibility to destabilizing oxidant – singlet oxygen. Before disinfection treatment, we determined total microbial air contamination according to the original method, providing a possibility to use air medium sampling of the total volume of indoor area. Experimental results have shown a decrease in total microbial contamination by a factor of 5.5 on average.

Using a cluster approach in the regional agro-industrial complex' structure design

2021 ◽  
Vol 19 (8) ◽  
pp. 1420-1456
Author(s):  
Lyudmila I. PRONYAEVA ◽  
Ol'ga A. FEDOTENKOVA ◽  
Anna V. PAVLOVA
Keyword(s):  
Complex Structure ◽  
Industrial Clusters ◽  
Original Method ◽  
Structure Design ◽  
Comprehensive Approach ◽  
Industrial Complex ◽  
Cluster Approach ◽  
Agricultural Economy ◽  
Foreign Countries ◽  
Organizational Work

Subject. This article studies the processes of clustering of the agro-industrial complex of the Orel Oblast. Objectives. The article aims to develop an improved methodology for identifying regional agro-industrial clusters. Methods. For the study, we used the methods of generalization, localization, formal characterization, and the point-rating and cartographic methods. Results. The article defines modern trends in the clustering of the agricultural economy in foreign countries and Russia, and offers an original method to identify regional agro-industrial clusters. Conclusions. The developed comprehensive approach to the identification of agro-industrial clusters can help systematically arrange organizational work to create them.

scholarly journals Surgical Smoke and Airborne Microbial Contamination in Operating Theatres: Influence of Ventilation and Surgical Phases

2020 ◽  
Vol 17 (15) ◽  
pp. 5395
Author(s):  
Francesco Romano ◽  
Samanta Milani ◽  
Jan Gustén ◽  
Cesare Maria Joppolo
Keyword(s):  
Ultrafine Particles ◽  
Microbial Contamination ◽  
Ventilation System ◽  
Contamination Level ◽  
Operating Table ◽  
Surgical Smoke ◽  
Air Contamination ◽  
Airborne Contamination ◽  
Operating Theatres ◽  
Ventilation Systems

Air cleanliness is a crucial factor in operating theatres (OTs), where the health of patients and staff must be preserved by controlling air contamination. Particular attention must be paid to ultrafine particles (UFPs) size range, generated for instance by electrosurgical instruments (ESTs). OT contamination is also affected by ventilation systems, medical staff and their gowning system, staff routines, instruments, etc. This comparative study is based on experimental measurements of airborne microbial contamination and UFPs carried out during real ongoing surgeries in two OTs equipped with upward displacement ventilation (UWD) and hybrid ventilation, with unidirectional airflow on the operating table and peripheral mixing (UDAF+Mixing) ventilation systems. Airborne contamination concentration at the exit grilles has been analyzed as function of four different surgical phases normally performed during an operation. Results highlight that airborne contamination is influenced by the activities carried out during the surgical phases. EST usage affects the contamination level more than staff size during operation observed. Colony forming unit (CFU) values in the protected area close to the patient’s wound are influenced more by the type of ventilation system than by surgical phases. CFU values decrease by 18 to 50 times from the UWD system to the hybrid one. The large airflow volumes supply together with high air velocities in OTs equipped with UDAF+Mixing systems guarantee a better and a safer airborne contamination control for patients and medical team in comparison with UWD systems.

scholarly journals Potential Application of Modified α-Mangostin Xanthones from Garcinia mangostana as Antibacterial Agents in Food Packaging

2016 ◽  
Author(s):  
Srinivasan Narasimhan ◽  
Shanmugam Maheshwaran ◽  
Palmiro Poltronieri ◽  
Imad A. Abu-Yousef ◽  
Amin F. Majdalawieh ◽  
...  
Keyword(s):  
Food Packaging ◽  
Antibacterial Agents ◽  
Microbial Contamination ◽  
Garcinia Mangostana ◽  
Parent Molecule ◽  
Synthetic Analogs ◽  
Microbial Properties ◽  
Therapeutic Value ◽  
Microbial Potential ◽  
Microbial Agents

The microbial contamination in food packaging have been a major concern that paved the way for the search for natural based new anti-microbial agents, such as modified α-mangostin. In the present work, twelve synthetic analogs were obtained via semi-synthetic modification of α-mangostin by Ritter reaction, reduction by palladium-carbon (Pd-C), alkylation, and acetylation. The evaluation of the anti-microbial potential of the synthetic analogs showed higher therapeutic value than the parent molecule. The anti-microbial studies proved that I E showed higher antibacterial activity whereas I I showed most significant antifungal activity. Due to their microbial properties, modified α-mangostin can be utilized as active anti-microbial agents in food packaging.

scholarly journals Microbial contamination of the air at the wastewater treatment plant

2012 ◽  
Vol 60 (3) ◽  
pp. 233-240 ◽  
Author(s):  
Monika Vítězová ◽  
Tomáš Vítěz ◽  
Hana Mlejnková ◽  
Tomáš Lošák
Keyword(s):  
Wastewater Treatment ◽  
Wastewater Treatment Plant ◽  
Microbial Contamination ◽  
Wastewater Treatment Plants ◽  
Treatment Plant ◽  
Coliform Bacteria ◽  
Psychrophilic Bacteria ◽  
Air Contamination ◽  
Mesophilic Bacteria ◽  
Colony Forming Units

Wastewater treatment plants (WWTPs) primarily serve to protect the environment. Their task is to clean waste water from the agglomerations. On the other hand wastewater treatment plants can also negatively affect the environment in their neighbourhood. These include emissions of odour and microorganisms. This article discusses the microbial contamination of the air, called bioaerosols in selected wastewater treatment plant for 18 000 p.e. From results of the work is evident that the largest group of microorganisms in the monitored air were psychrophilic and mesophilic bacteria and microscopic fungi. The number of psychrophilic bacteria ranged from 14 to 12 000 CFU/m3(colony forming units in 1 m3), the number of mesophilic bacteria varied in the range from 20 to 18 500 CFU/m3and the fungi from 25 to 32 000 CFU/m3in the air. The amount of actinomycetes ranged from 1 to 1 030 CFU/m3and faecal coliform bacteria from 0 to 2 500 CFU/m3. Furthermore, it was confirmed that the highest air contamination was around the activation tank, area for dewatered sludge and around the building of mechanical cleaning, depending on the season. The density of studied microorganisms correlated with air temperature.

scholarly journals The Importance of Atmospheric Microbial Contamination Control in Dental Offices: Raised Awareness Caused by the SARS-CoV-2 Pandemic

2021 ◽  
Vol 11 (5) ◽  
pp. 2359 ◽  
Author(s):  
Avram Manea ◽  
Diana Crisan ◽  
Grigore Baciut ◽  
Mihaela Baciut ◽  
Simion Bran ◽  
...  
Keyword(s):  
Natural Ventilation ◽  
Microbial Contamination ◽  
Point Of View ◽  
Protective Equipment ◽  
High Exposure ◽  
Contamination Control ◽  
Air Contamination ◽  
Ultraviolet C ◽  
Dental Offices ◽  
Air Circulation

Background: In the context of the Sars-CoV-2 pandemic that started in 2020, more attention is being paid to the air quality in medical offices. The medical, economic and social implications of this crisis are unprecedented. Dental offices, particularly, were significantly affected by this pandemic due to the high exposure of dental workers, limited availability of personal protective equipment (PPE) and serious financial problems. Methods: Four different procedures were compared regarding their effectiveness in air contamination reduction, both from a biological point of view and from a management point of view: Fogging, Ultraviolet C (UVC) lamps, UVC air circulation units and natural ventilation. A total of 56 Petri dishes were used to evaluate air contamination. Results: All four procedures offered good results but the decontamination time and overall effect varied depending on the chosen method. Fogging was the only method that managed to remove all the identifiable pathogens. Conclusions: Fogging proved to be superior from a medical point of view, while the UVC air circulation unit proved to be more efficient from a management point of view.

scholarly journals Investigation of the microclimate of poultry houses and chemical composition of poultry litter, depending on the time of its accumulation in the cage batteries

2019 ◽  
Vol 9 (3) ◽  
pp. 272-279
Author(s):  
A. P. Palii ◽  
O. A. Naumenko ◽  
O. I. Shkromada ◽  
L. A. Tarasenko ◽  
K. A. Rodionova ◽  
...  
Keyword(s):  
Chemical Composition ◽  
Microbial Contamination ◽  
Negative Impact ◽  
Warm Season ◽  
Cold Season ◽  
Contamination Level ◽  
Poultry House ◽  
Air Contamination ◽  
Poultry Houses ◽  
Maximum Contamination Level

One of the main reasons of the destabilization of the ecological environment around poultry farms is the widespread use of resource-consuming and environmentally irrational production processes and technological preparation, processing and disposal of poultry waste. Nowadays, cage batteries with a belt removal system are becoming more widespread in the poultry farming. However, the use of such equipment does not guarantee compliance with applicable veterinary and sanitary requirements for the content of harmful gases in the air of the poultry houses and its microbial contamination. This, in turn, has a negative impact on the state of the environment. In addition, the equipment designed for countries with a milder climate than in Ukraine does not support the designed regimes of its individual systems. Therefore, the study of the effect of the accumulation of the litter on the belts of the cage batteries on its humidity, chemical composition and microclimate in the poultry house, from the environmental point of view, remains an urgent problem. On the basis of complex studies, the kinetics of the drying of the litter on the belt conveyors of the cage batteries for keeping laying hens with built-in air ducts and without air ducts in different seasons, as well as the effect of the duration of the accumulation of the litter on the microclimate in the poultry house, microbial contamination and chemical composition of the litter have been studied. The study of the microclimate in the poultry house, depending on the time of accumulation of the litter on the conveyor belts, showed that with the increase in the time of accumulation of excrements in the air, the content of ammonia increased, and after 5 days of accumulation in the cold season its level began to exceed the maximum contamination level (MCL)-15 mg per m3 of the air. The amount of ammonia on the 7th day of the litter accumulation in all poultry houses was 1.8-2.8 times greater (P 0.001) compared to the first day. The amount of carbon dioxide in the air increased by 1.14-2.00 times, but it never exceeded the MCL - 0.25%. When studying the both types of cage batteries, 1.2-2.6 times the maximum contamination level of the air (220 thous. microbic units per m3) was established in the poultry houses. In the case of cage batteries without built-in ducts from the 1st to the 7th day of accumulation, microbial air contamination increased by 1.9 times in the cold season, and by 1.7 times - in the warm season; and on the 7th day it was 579 and 462 thous. microbic units per m3, respectively. When using the cage batteries with built-in ducts, microbial air contamination increased slightly: by 1.7 times in the cold season and 1.4 times in the warm season and on the 7th day it was 535 and 580 thous. units per m3, respectively.

Evaluation of bag sequential sampling technique for ambient air analysis. Comments

1979 ◽  
Vol 13 (5) ◽  
pp. 609-610
Author(s):  
Allen Hoffman ◽  
Roger Sperling ◽  
John Polasek ◽  
Jerry Bullin
Keyword(s):  
Sequential Sampling ◽  
Sampling Technique ◽  
Ambient Air ◽  
Air Analysis

Minimally Invasive Repair of Pectus Excavatum (MIRPE) - The Basel Experience

Swiss Surgery ◽  
2003 ◽  
Vol 9 (6) ◽  
pp. 289-295 ◽  
Author(s):  
Haecker ◽  
Bielek ◽  
von Schweinitz
Keyword(s):  
Minimally Invasive ◽  
Pectus Excavatum ◽  
Pulmonary Function Tests ◽  
Preoperative Evaluation ◽  
Skin Incision ◽  
Original Method ◽  
Restrictive Lung Disease ◽  
Cardiac Compression ◽  
Cardiac Evaluation ◽  
Indications For Operation

Purpose: Minimally invasive repair of pectus excavatum (MIRPE) was first reported in 1998 by D. Nuss. This technique has gained wide acceptance during the last 4-5 years. In the meantime, some modifications of the technique have been introduced by different authors. Our retrospective study reports our own experience over the last 36 months and modifications introduced due to a number of complications. Methods: From 3/2000 to 3/2003, 22 patients underwent MIRPE. Patients median age was 15.5 years (10.7 to 20.3 years). Standardised preoperative evaluation included 3D computerised tomography (CT) scan, pulmonary function tests, cardiac evaluation with electrocardiogram and echocardiography, and photo documentation. Indications for operation included at least two of the following: Haller CT index > 3.2, restrictive lung disease, cardiac compression, progression of the deformity and severe psychological alterations. Results: In 22 patients (2 girls, 20 boys) undergoing MIRPE procedure, a single bar was used in 21 patients and two bars in one boy. Lateral stabilisers were fixed with non resorbable sutures on both sides. Overall, postoperative complications occurred in six patients (27.3%). In two patients (9.1%) a redo-procedure was necessary due to bar displacement. An additional median skin incision was performed in two patients to elevate the sternum. Pneumothorax or hematothorax in two patients resulted in routine use of a chest tube on both sides. Long-term favourable results were noted in all patients. Conclusions: The MIRPE procedure is an effective method with elegant cosmetic results. Modifications of the original method help to decrease the complication rate and to accelerate acquirement of expertise.

Dermatitis in pets: Study of Brazilian savannah plants as potential antibacterial agents

Planta Medica ◽  
2014 ◽  
Vol 80 (16) ◽  
Author(s):  
AC Valle ◽  
L Rabelo ◽  
AL Magalhães ◽  
M Neves ◽  
I Maciel ◽  
...  
Keyword(s):  
Antibacterial Agents ◽  
Brazilian Savannah
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