Oxidative Quality of Dairy Powders: Influencing Factors and Analysis

Volatile organic compounds (VOCs) are the main source influencing the overall air quality of an environment. It is a well-known fact that coated furniture units, in the form of paints and varnishes, emit VOCs, reducing the air quality and resulting in significant health problems. Exposure time to such compounds is also an important parameter regarding their possible health effects. Such issues also have a greater influence when the exposure period is extended. The main objective of this study was to review some of the important factors for the emission of VOCs from coated furniture, from the perspective of material characteristics, as well as health concerns. Some methods for controlling VOC emissions to improve indoor air quality, from the point of view recent regulations and suggestions, are also presented in this work.

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400. Factors influencing the keeping quality of ghee

Journal of Dairy Research ◽

10.1017/s0022029900005525 ◽

1949 ◽

Vol 16 (3) ◽

pp. 356-362 ◽

Cited By ~ 1

Author(s):

D. P. Persai ◽

C. R. Barnicoat

Keyword(s):

Heat Treatment ◽

Bacterial Culture ◽

Storage Life ◽

Summer Temperature ◽

Final Temperature ◽

Marked Influence ◽

Factors Influencing ◽

Keeping Quality ◽

Main Factors

Of the four main factors commonly regarded as influencing keeping properties of ghee, viz. moisture content, acidity, heat treatment and type of bacterial culture used in souring, the heat treatment was found to be the most important.In general, the higher the final temperature (110° C. and higher) attained during evaporation, the better were the keeping properties of the product, providing that the butter had been heated in contact with curd, boiled as rapidly as possible, and given a minimum amount of stirring.The improved keeping properties conferred on ghee heated to 110–150° C. were promoted by antioxidants (apparently phospholipids) extracted from the curd during cooking.Initial acidity and moisture contents had no effect on storage life of ghee at 38° C., and the practice of grading ghee according to its acidity would appear to be of questionable value. Souring of milk to give 2·5–3·0% lactic acid and the accompanying desirable flavour did not detract from the keeping quality of the ghee made from it.The type of bacterial culture used for souring had only slight influence on keeping quality of ghee, but a marked influence on flavour.Storage life of ghee at 38° C. (‘Indian summer temperature’) could be predicted with fair accuracy from its rate of oxidation at 100° C. in a ‘Swift oxidation tester’.

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Test Gas Generation from Pure Liquids: An Application-Oriented Overview of Methods in a Nutshell

International Journal of Chemical Engineering ◽

10.1155/2012/417029 ◽

2012 ◽

Vol 2012 ◽

pp. 1-6 ◽

Cited By ~ 15

Author(s):

Yue Li ◽

Tim Täffner ◽

Michael Bischoff ◽

Bernd Niemeyer

Keyword(s):

Organic Compounds ◽

Field Experiments ◽

Gas Generation ◽

Flow Rates ◽

Test Gas ◽

Advantages And Disadvantages ◽

Volatile Organic ◽

Different Temperatures ◽

Accuracy And Stability

The generation of test gas from pure liquids has a wide variety of applications in laboratory and field experiments, for which the quality of the test gas is of significance. Therefore, various methods for test gas generation have been designed. Each method has unique advantages and disadvantages. Thus, a short overview is presented within the scope of this paper. Furthermore, a common bubbler system is presented, which was built to generate test gas from volatile organic compounds for experimental usage in laboratory applications. An analysis is conducted with respect to the generated concentrations at different temperatures and flow rates of the diluting gas. Accuracy and stability of this method are investigated.

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BASIC TRENDS OF VARIATION OF THE QUALITATIVE COMPOSITION OF SAMARA SURFACE WATER RUN-OFFS

URBAN CONSTRUCTION AND ARCHITECTURE ◽

10.17673/vestnik.2011.02.18 ◽

2011 ◽

Vol 1 (2) ◽

pp. 80-82 ◽

Cited By ~ 1

Author(s):

E. D PALAGIN ◽

P. G BYKOVA ◽

U. M PAKhOMOVA

Keyword(s):

Surface Water ◽

Qualitative Composition ◽

Factors Influencing ◽

Main Factors

Generalizing the data on the quality of surface water run-offs on the territory of Samara the authors reveal the main factors influencing the qualitative composition of water run-offs and define the structure of the links between certain parameters. In the course of research representative diagnostic set of parameters for monitoring the composition of water run-offs has been worked out.

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Working out a procedure for determining potentially hazardous volatile organic compounds (trichloroethylene and tetrachloroethylene) in ambient air

Health Risk Analysis ◽

10.21668/health.risk/2020.4.13.eng ◽

2020 ◽

pp. 113-120

Author(s):

T.S. Ulanova ◽

◽

T.V. Nurislamova ◽

N.A. Popova ◽

O.A. Mal'tseva ◽

...

Keyword(s):

Gas Chromatography ◽

Volatile Organic Compounds ◽

Organic Compounds ◽

Limit Of Detection ◽

Ambient Air ◽

Gas Liquid Chromatography ◽

Chemical Safety ◽

Volatile Organic ◽

Working Out

The article dwells on results obtained via experimental research on working out a gas chromatography procedure for determining trichloroethylene and tetrachloroethylene in ambient air. Experiments were performed on substances which had low limits of detection with gas-liquid chromatography with electron capture detection (GLC/ECD) when examined substances were absorbed from ambient air on Tenax TA sorbent. Optimal gas chromatography parameters were established with a hardware-software complex based on «Crystal-5000» gas chromatographer and use of a column from IDBPX-VOL series, 60m⋅0.32mm⋅1.8µm, under the following temperatures: column, 50–230о С; evaporator, 250о С; detector, 250о С. The developed capillary gas chromatography procedure allows determining trichloroethylene in concentrations ranging from 0.000146 to 0.00146 mg/m3, and tetrachloroethylene, from 0.000081 to 0.00081 mg/m3 with inaccuracy not exceeding 25.0%. We performed metrological assessment of the procedure and it allowed determining quality of analysis results for trichloroethylene and tetrachloroethylene; they were as follows: precision, 21.97% and 14.3%: repeatability, 4.22% and 3.38%; reproducibility, 5.66% and 4.9%. Limit of detection (LOD) for trichloroethylene and tetrachloroethylene was =0.0000038 mg/dm3 and =0.00000083 mg/dm3 accordingly. Limit of quantitative determination (LOQ) was =0.000013 mg/m3 for trichloroethylene, and = 0.0000028 mg/m3 for tetrachloroethylene. The developed procedure allowed detecting contents of the examined substances in ambient air near a construction site and a dry-cleaner’s, trichloroethylene in a range from 0.00001 mg/m3 to 0.0009 mg/m3, tetrachloroethylene, from 0.000011 mg/m3 to 0.00039 mg/m3. This unified high-sensitive and selective procedure is recommended for systemic control over potentially hazardous volatile organic compounds in ambient air as it allows providing objective and reliable hygienic assessment of chemical safety and quality of the environment and health risk assessment.

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Working out a procedure for determining potentially hazardous volatile organic compounds (trichloroethylene and tetrachloroethylene) in ambient air

Health Risk Analysis ◽

10.21668/health.risk/2020.4.13 ◽

2020 ◽

pp. 113-120

Author(s):

T.S. Ulanovа ◽

◽

T.V. Nurislamova ◽

N.A. Popova ◽

O.A. Mal'tseva ◽

...

Keyword(s):

Gas Chromatography ◽

Volatile Organic Compounds ◽

Organic Compounds ◽

Limit Of Detection ◽

Ambient Air ◽

Gas Liquid Chromatography ◽

Chemical Safety ◽

Volatile Organic ◽

Working Out

The article dwells on results obtained via experimental research on working out a gas chromatography procedure for determining trichloroethylene and tetrachloroethylene in ambient air. Experiments were performed on substances which had low limits of detection with gas-liquid chromatography with electron capture detection (GLC/ECD) when examined substances were absorbed from ambient air on Tenax TA sorbent. Optimal gas chromatography parameters were established with a hardware-software complex based on «Crystal-5000» gas chromatographer and use of a column from IDBPX-VOL series, 60m⋅0.32mm⋅1.8µm, under the following temperatures: column, 50–230о С; evaporator, 250о С; detector, 250о С. The developed capillary gas chromatography procedure allows determining trichloroethylene in concentrations ranging from 0.000146 to 0.00146 mg/m3, and tetrachloroethylene, from 0.000081 to 0.00081 mg/m3 with inaccuracy not exceeding 25.0%. We performed metrological assessment of the procedure and it allowed determining quality of analysis results for trichloroethylene and tetrachloroethylene; they were as follows: precision, 21.97% and 14.3%: repeatability, 4.22% and 3.38%; reproducibility, 5.66% and 4.9%. Limit of detection (LOD) for trichloroethylene and tetrachloroethylene was =0.0000038 mg/dm3 and =0.00000083 mg/dm3 accordingly. Limit of quantitative determination (LOQ) was =0.000013 mg/m3 for trichloroethylene, and = 0.0000028 mg/m3 for tetrachloroethylene. The developed procedure allowed detecting contents of the examined substances in ambient air near a construction site and a dry-cleaner’s, trichloroethylene in a range from 0.00001 mg/m3 to 0.0009 mg/m3, tetrachloroethylene, from 0.000011 mg/m3 to 0.00039 mg/m3. This unified high-sensitive and selective procedure is recommended for systemic control over potentially hazardous volatile organic compounds in ambient air as it allows providing objective and reliable hygienic assessment of chemical safety and quality of the environment and health risk assessment.

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The Analysis of Fertility Quality of Life and the Influencing Factors of Patients with Repeated Implantation Failure

10.21203/rs.3.rs-68411/v1 ◽

2020 ◽

Author(s):

Ying Ni ◽

Chenye Tong ◽

Limin Huang ◽

Wenjie Zhou ◽

Aijun Zhang

Keyword(s):

Quality Of Life ◽

Social Support ◽

Male Infertility ◽

Implantation Failure ◽

Repeated Implantation Failure ◽

Financial Difficulties ◽

Factors Influencing ◽

Family Social Support ◽

Main Factors

Abstract BackgroundAt present, the incidence of RIF reaches 5% -10% during IVF/ICSI assisted pregnancy treatment. RIF causes heavy financial burden and mental stress on patients and families and affects the quality of their lives. This study is aimed to investigate the current status of fertility quality of life (feritility QOL) and explore the factors influencing in patients with repeated implantation failure (RIF), thereby providing scientific basis for effective clinic interventional measures and helping to improve the feritility QOL of RIF patients.MethodsRIF patients were selected from the Reproductive Medical Center of Ruijin Hospital Affiliated to Shanghai Jiaotong University School of Medicine from January 2019 to December 2019. The General information questionnaire, FertiQoL scale, perceived social support scale (PSSS), self-rating anxiety scale (SAS), self-rating depression scale (SDS) were used to analyze the feritility QOL and related factors of RIF patients. ResultsThe total score of feritility QOL of RIF patients is (60.44 ± 11.60). The results of multivariate regression analysis showed that residence, financial difficulties, male infertility, BMI index, depression, family social support are the main factors that influence the feritility QOL of RIF patients (adjusted R2 = 0.762). ConclusionAmong the factors influencing the feritility QOL of RIF patients, residence, financial difficulties, male infertility, BMI index, depression and family social support are the main factors. Therefore, medical practioners should take specific interventional measures to improve the RIF patients’ feritility QOL.

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THE MAIN FACTORS INFLUENCING THE FUNCTIONING OF HOTEL-RESTAURANT COMPLEXES AND TOURISM IN UKRAINE

International scientific journal Internauka Series Economical Sciences ◽

10.25313/2520-2294-2021-8-7430 ◽

2021 ◽

Author(s):

Ruslan Skrynkovskyy ◽

◽

Sviatoslav Kniaz ◽

Mariana Khmyz ◽

Yuriy Tyrkalo ◽

...

Keyword(s):

Economic Crisis ◽

Methodological Approach ◽

Tourism Industry ◽

Species Classification ◽

Travel Agents ◽

Factors Influencing ◽

Travel Agencies ◽

Main Factors

The article presents the main factors influencing the functioning of hotel-restaurant complexes and tourism in Ukraine. It has been established that hotel and restaurant and tourist complexes are included in the structure of the subjects of tourist activity. It was found that in the period 2013– 2019 the volume of services provided by temporary accommodation and catering companies, travel agencies, travel operators, companies providing other services, in particular, booking and related activities, has an unstable dynamic. It was determined that the dynamics of the total number of inbound (foreign), outbound and domestic tourists who were served by tour operators and travel agents by type of tourism was unstable, since the main reason that negatively affected this trend was the economic crisis of 2013–2015 in Ukraine, caused primarily by the instability of the situation in the political sphere. It was determined that in the species classification of tourism, that is, the distribution of tourists who were served by tour operators and travel agents, the highest is the number of outbound tourists traveling outside Ukraine. It was found that the number of domestic tourists is significantly lower than the number of outbound tourists, since on average for 2011–2020 was 23,6 %, and the lowest was in 2019 – 9,4 %, due to the COVID–2019 pandemic, under the influence of which another economic crisis arose not only in Ukraine, but also in the world as a whole. It was found that the proportion of inbound (foreign) tourists in the period 2011–2020 decreased sharply – from 10,6 % in 2010 to 0,5 % in 2020, the reason for which is the decrease in the attractiveness of the tourism industry of Ukraine for foreign tourists. It is noted that the prospects for further research in this direction are the development of a methodological approach to assessing the quality of tourism and hotel and restaurant services.

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Structural Analysis of Factors Influencing Quality Innovation Capability in Manufacturing Enterprises

Key Engineering Materials ◽

10.4028/www.scientific.net/kem.584.268 ◽

2013 ◽

Vol 584 ◽

pp. 268-276

Author(s):

Wei Hong Li

Keyword(s):

Innovation System ◽

Practical Significance ◽

Structure Model ◽

Innovation Capability ◽

Factors Affecting ◽

Manufacturing Enterprises ◽

Factors Influencing ◽

Main Factors ◽

The Relationship

Through the research on the connotation of quality innovation capability in manufacturing enterprises, 22 factors influencing the quality innovation capability in manufacturing enterprises have been screened out. Based on this, the application of interpretative structural modeling (ISM) has determined the relationship between these factors, establishing the multilevel hierarchical structure model of the main factors affecting the quality innovation capability in manufacturing enterprises, and analyzing the relationships between the five levels of the model and the different roles of each factor that the quality innovation capability of manufacturing enterprises innovation system plays. The results have practical significance for manufacturing enterprises to enhance the quality of innovation capability.

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