scholarly journals The technique of optical-electrochemical microbiological testing as applied to the comparative analysis of the prebiotic and antimicrobial properties of various plant extracts

2021 ◽  
pp. 26-38
Author(s):  
V. S. Sibirtsev ◽  
◽  
U. Yu. Nechiporenko ◽  
Keyword(s):  
Comparative Analysis ◽  
Juglans Regia ◽  
Antimicrobial Properties ◽  
Viscum Album ◽  
Exact Nature ◽  
Chelidonium Majus ◽  
Vital Activity ◽  
Elastic Light Scattering ◽  
Different Types ◽  
Microbiological Testing

A biotesting technique is described that provides for periodic (every 2 h) recording of changes in the in-tensity of elastic light scattering, pH and electrical conductivity of a liquid nutrient medium incubated in the presence and absence of viable test microorganisms and test samples. The results of a comparative analysis using this technique of antibiotic activity against Staphylococcus aureus of different concentra-tions of whole subcritical extracts obtained using liquefied CO2 from 10 different types of plant raw mate-rials are presented. Studies have shown that among the samples studied by us, the most active prolonged antimicrobial properties were exhibited by extracts from the roots of Chelidonium majus and flowers of Calendula officinalis at their concentration in the test medium (CTE) more than 3 vol.%. And the most ac-tive prolonged prebiotic properties were exhibited by extracts from shoots of Viscum album and leaves of Juglans regia at CTE = 0.2 vol.%. In this case, the biological activity of the tested samples with respect to test microorganisms in most cases monotonically decreased with an increase in the interaction time of the mentioned microorganisms and samples. However, the exact nature of these dependencies in most cases can be established only with the help of a significant number of tests. And the latter can be conveniently carried out using the methodology presented in this work, which allows a much more rapid, objective and informative, as well as much less laborious and material-intensive, than when using standard visual mi-crobiological methods, to assess the effect on the dynamics of the vital activity of microorganisms of vari-ous tested samples.

scholarly journals Comparative analysis of cytostatic and antibacterial activity of extracts of ambrosia artemisiifolia and other medicinal plants and determination of lithic activity of extracts of ambrosia artemisiifolia

2019 ◽  
Vol 77 (1) ◽  
pp. 71-75
Author(s):  
A. Megalinska ◽  
M. Sokulska
Keyword(s):  
Antibacterial Activity ◽  
Comparative Analysis ◽  
Medicinal Plants ◽  
Water Extract ◽  
Viscum Album ◽  
Ambrosia Artemisiifolia ◽  
Raw Material ◽  
Cytostatic Activity ◽  
Chelidonium Majus

The article is devoted to the important problem of the search of herbal preparations with high antibacterial, cytostatic and lithic activity. The plants such as Ambrosia artemisiifolia, which belongs to the family of Aystrou, are promising in this direction. The aim of the presented work is to study the antibacterial, cytostatic and lithic activity of water extracts of Ambrosia polynolithic and conduct a comparative analysis of these properties with other medicinal plants. Determining that the lectin extract from the green shoots (until flowering) of Ambrosia artemisiifolia does not agglutinate red blood cells, makes it possible to consider this raw material as a potential drug in pharmacology. Investigation of cytostatic activity by the method of Ivanov and Bystrova enabled to establish a place of ambrosia among already well-known medicinal plants. The cytostatic activity of the investigated plants can be represented by the following series in the order of reduction: Chelidónium május, Ambrosia artemisiifolia, Vinca minor, Viscum album. The establishment of antibacterial activity allowed to confirm the presence of anti-staphylococcal activity of the water extract of ambrosia and its significant effect on the colon. Anti-staphylococcus activity of the water extract of Ambrosia artemisiifolia is close to Viscum album and Chelidónium május. The antibacterial effect against Proteus vulgaris was the highest in the extract of аmbrosiа shoots, compared with other medicinal plants studied. Taking into account the phylogenetic method, it could be expected that the plants of the Aystroe family may have a lithic activity with respect to the concrements that are formed in the kidneys of man. So, a study was conducted on the lithic activity of polystyrene embryos and it was found that Ambrosia artemisiifolia has a high lithic activity in relation to urate and oxalate concretions.

Electrochemical biotesting technique as applied to comparative assessment of antimicrobial properties of essential oils

2021 ◽  
pp. 50-55
Author(s):  
V. S. Sibirtsev ◽  
U. Yu. Nechiporenko ◽  
V. L. Kabanov ◽  
M. Yu. Kukin
Keyword(s):  
Essential Oils ◽  
Culture Medium ◽  
Raw Materials ◽  
Antimicrobial Properties ◽  
Antibiotic Activity ◽  
Visual Methods ◽  
Vital Activity ◽  
Plant Raw Materials ◽  
Liquid Culture Medium ◽  
Microbiological Testing

A biotesting technique is described that provides for periodic (every 2 hours) recording of changes in pH, redox potential, and electrical conductivity of a liquid culture medium incubated in the presence and in the absence of viable test microorganisms (TM) and test samples (TS). The results of a comparative analysis using this technique of antibiotic activity against Staphylococcus aureus of different concentrations of «essential oils» obtained from 10 types of plant raw materials are presented. Based on this, we can conclude the following. Using the presented methodology, it is possible to assess the effect on the dynamics of the vital activity of TM of samples of various pharmaceutical, cosmetic, food, feed and other products, much more quickly, objectively and informatively than using standard visual methods of microbiological testing. The initial antibiotic activity of TS in most cases was greater than their prolonged antibiotic activity. At the same time, the mid-term (in terms of the time of interaction of TS with TM) antibiotic activity of TS was usually intermediate in value between their initial and prolonged biological activity.

Comparative Analysis of Machine Learning Techniques Using Predictive Modeling

2020 ◽  
Vol 13 ◽  
Author(s):  
Ritu Khandelwal ◽  
Hemlata Goyal ◽  
Rajveer Singh Shekhawat
Keyword(s):  
Machine Learning ◽  
Comparative Analysis ◽  
Data Science ◽  
Training Data ◽  
Machine Learning Techniques ◽  
Future Trends ◽  
Data Set ◽  
Learning Stage ◽  
Learning Techniques ◽  
Different Types

Introduction: Machine learning is an intelligent technology that works as a bridge between businesses and data science. With the involvement of data science, the business goal focuses on findings to get valuable insights on available data. The large part of Indian Cinema is Bollywood which is a multi-million dollar industry. This paper attempts to predict whether the upcoming Bollywood Movie would be Blockbuster, Superhit, Hit, Average or Flop. For this Machine Learning techniques (classification and prediction) will be applied. To make classifier or prediction model first step is the learning stage in which we need to give the training data set to train the model by applying some technique or algorithm and after that different rules are generated which helps to make a model and predict future trends in different types of organizations. Methods: All the techniques related to classification and Prediction such as Support Vector Machine(SVM), Random Forest, Decision Tree, Naïve Bayes, Logistic Regression, Adaboost, and KNN will be applied and try to find out efficient and effective results. All these functionalities can be applied with GUI Based workflows available with various categories such as data, Visualize, Model, and Evaluate. Result: To make classifier or prediction model first step is learning stage in which we need to give the training data set to train the model by applying some technique or algorithm and after that different rules are generated which helps to make a model and predict future trends in different types of organizations Conclusion: This paper focuses on Comparative Analysis that would be performed based on different parameters such as Accuracy, Confusion Matrix to identify the best possible model for predicting the movie Success. By using Advertisement Propaganda, they can plan for the best time to release the movie according to the predicted success rate to gain higher benefits. Discussion: Data Mining is the process of discovering different patterns from large data sets and from that various relationships are also discovered to solve various problems that come in business and helps to predict the forthcoming trends. This Prediction can help Production Houses for Advertisement Propaganda and also they can plan their costs and by assuring these factors they can make the movie more profitable.

scholarly journals Increasing University Competitiveness through Assessment of Green Content in Curriculum and Eco-Labeling in Higher Education

2021 ◽  
Vol 13 (2) ◽  
pp. 712
Author(s):  
Andrea Okanović ◽  
Jelena Ješić ◽  
Vladimir Đaković ◽  
Simonida Vukadinović ◽  
Andrea Andrejević Panić
Keyword(s):  
Higher Education ◽  
Sustainable Development ◽  
Comparative Analysis ◽  
Environmental Problems ◽  
Green Jobs ◽  
Positive Effects ◽  
The World ◽  
Different Types ◽  
Novi Sad ◽  
The University

Growing environmental problems and increasing requirements of green jobs force universities around the world not only to transform their curricula but also to enrich existing ones with contents related to the promotion of sustainable development. This paper aims to show the importance of measuring and monitoring the share of green contents in all university activities, as only in that way it is possible to monitor trends and give realistic assessments of their effect and importance. The paper presents a comparative analysis of different types of methodologies for assessing sustainable activities at universities as well as research conducted at the University of Novi Sad in Serbia and its comparison with the University of Gothenburg (Sweden). This research aims to point out the importance of increasing competitiveness in higher education through assessment of green content in a curriculum and its promotion. In this way, through eco-labeling methodology, it would be easier to identify those contents that, in a certain share, contribute to the promotion of sustainable development. Furthermore, this methodology can easily be extended across the country and the region, which would bring positive effects to all stakeholders in higher education.

scholarly journals Comparative Study on Phytochemical Profile and Antioxidant Activity of an Epiphyte, Viscum album L. (White Berry Mistletoe), Derived from Different Host Trees

Plants ◽  
2021 ◽  
Vol 10 (6) ◽  
pp. 1191
Author(s):  
Mahak Majeed ◽  
Tanveer Bilal Pirzadah ◽  
Manzoor Ahmad Mir ◽  
Khalid Rehman Hakeem ◽  
Hesham F. Alharby ◽  
...  
Keyword(s):  
Antioxidant Activities ◽  
Pearson Correlation ◽  
Juglans Regia ◽  
Radical Scavenging ◽  
Reducing Power ◽  
Viscum Album ◽  
Total Phenol Content ◽  
Leaf Extracts ◽  
Antioxidant Power ◽  
Ferric Reducing Antioxidant Power

The study aimed at evaluating the antioxidant profile of a medicinal epiphyte Viscum album L. harvested from three tree species, namely, Populus ciliata L, Ulmus villosa L., and Juglans regia L. The crude extracts were obtained with ethanol, methanol, and water and were evaluated for the total phenol content (TPC), total flavonoid content (TFC), and antioxidant activities using total reducing power (TRP), ferric reducing antioxidant power (FRAP), 1, 1-diphenyl 1-2-picryl-hydrazyl (DPPH), superoxide radical scavenging (SOR), and hydroxyl radical scavenging (•OH) assays. Our results showed that crude leaf extracts of plants harvested from the host Juglans regia L. exhibited higher yields of phytochemical constituents and noticeable antioxidative properties. The ethanolic leaf samples reported the highest phenols (13.46 ± 0.87 mg/g), flavonoids (2.38 ± 0.04 mg/g), FRAP (500.63 ± 12.58 μM Fe II/g DW), and DPPH (87.26% ± 0.30 mg/mL). Moreover, the highest values for TRP (4.24 ± 0.26 μg/mL), SOR (89.79% ± 0.73 mg/mL), and OH (67.16% ± 1.15 mg/mL) were obtained from aqueous leaf extracts. Further, Pearson correlation was used for quantifying the relationship between TPC, TFC, and antioxidant (FRAP, DPPH, SOR, OH) activities in Viscum album L. compared to their hosts. It was revealed that the epiphyte showed variation with the type of host plant and extracting solvent.

Comparative Analysis of the Strength properties of Specimens Printed from Three Different Types of 3-D Printers

2021 ◽  
Author(s):  
madinah shamsu ◽  
Tesfaye Segni ◽  
Olurotimi Joaquim ◽  
Oluwatosin Fagbuyi ◽  
Landon Onyebueke
Keyword(s):  
Comparative Analysis ◽  
Strength Properties ◽  
Different Types

Comparative analysis of different types of ballistic barrels used in the ammunition researches

2021 ◽  
Vol 70 (1) ◽  
pp. 31-41
Author(s):  
Dawid Goździk ◽  
Bartosz Fikus ◽  
Jacek Kijewski
Keyword(s):  
Comparative Analysis ◽  
Mechanical Engineering ◽  
Flight Path ◽  
Different Types ◽  
Ballistic Properties ◽  
Ballistic Tests ◽  
Made In ◽  
Gas Pressures

Manufacturers offer different types of ballistic barrels made in according to various standards. The paper presents comparison of three types of ballistic barrels: pressure, velocity and accuracy made according to C.I.P. and NATO EPVAT standards. Projectile velocities in a several measuring points on the flight path and propellant gas pressures in the barrels were measured and compared. The main aim of the article is to discuss whether all types of barrels to conduct most ballistic tests are needed, or whether one, the most universal in a specific caliber is enough. Keywords: mechanical engineering, ballistics, firearm, ammunition researches, ballistic properties

scholarly journals Analysis of rail yard and terminal performances

2014 ◽  
Vol 8 (2) ◽  
pp. 178-200 ◽  
Author(s):  
Marin Marinov ◽  
Leonardo Di Giovanni ◽  
Giulia Bellisai ◽  
Julian Clevermann ◽  
Anastasia Mastellou ◽  
...  
Keyword(s):  
Comparative Analysis ◽  
Critical Points ◽  
Network Performance ◽  
Logical Consequence ◽  
Time Frame ◽  
Key Factors ◽  
Railway Network ◽  
Rail Infrastructure ◽  
Different Types ◽  
Junction Points

One of the latest trends in the transport field is the increasing interest for the rejuvenation of the railway. It is considered to be a logical consequence of the gradual switch towards a more sustainable future in transports. Terminals and stations are considered to be the junction points between the various lines that constitute the railway network and can simply be described as points of arrival, departure and interchange of passengers or commodities. The most commonly used indicators that measure the level of their performance are time and cost. This study aims at exploring possible improvements that could be implemented to the infrastructure and the operation of terminals and stations in order to increase the efficiency level. Firstly, drawing upon grounded theory about rail infrastructure and terminals, a description is conducted, followed by a comparative analysis of the different types of existing terminals and stations. Secondly, the suggested improvements are presented in accordance with their time frame completion. The main contribution of this study is to illustrate the high significance of terminals, stations and yards, acknowledging them as crucial parts of the railway network, because as characterized and demonstrated in this study, their performance are key factors to the whole network performance, making the identification of their critical points and respective possible solutions, the final objective of this paper. In addition to this, emphasis is given to the need of improving and developing the existing terminal infrastructure and operations.

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