scholarly journals Automated stand for the study of injectors made of polymer materials for hydraulic weed destruction

2020 ◽  
Vol 193 ◽  
pp. 01060
Author(s):  
Dmitriy Khort ◽  
Alexander Shutenko ◽  
Rostislav Filippov ◽  
Stepan Semichev
Keyword(s):  
Technological Process ◽  
Theoretical Calculations ◽  
Fruit Trees ◽  
Polymer Materials ◽  
Operating Modes ◽  
Hydraulic Method ◽  
The Impact

The work describes a new technological process for weed destruction and tillage in the near-stem zones of fruit trees and covers the prospects for studying the hydraulic method of weed destruction. The quality of hydraulic tillage and weed destruction has been determined to be conditioned by the shape and the required pressure of the jet. The results of theoretical calculations and initial tests show that an automated stand is needed for nozzles’ testing and optimizing the operating modes of the hydraulic device. A working body and an automated stand have been designed to study the parameters of nozzles made of polymer materials and the impact of the working body on various weeds and soil surfaces.

scholarly journals A Simulation Model of Construction Projects Executed in Random Conditions with the Overlapping Construction Works

2021 ◽  
Vol 13 (11) ◽  
pp. 5795
Author(s):  
Sławomir Biruk ◽  
Łukasz Rzepecki
Keyword(s):  
Simulation Model ◽  
Technological Process ◽  
Construction Projects ◽  
Working Time ◽  
Simulation Studies ◽  
Construction Methods ◽  
The Impact ◽  
Construction Works

Reducing the duration of construction works requires additional organizational measures, such as selecting construction methods that assure a shorter realization time, engaging additional resources, working overtime, or allowing construction works to be performed simultaneously in the same working units. The simultaneous work of crews may affect the quality of works and the efficiency of construction processes. This article presents a simulation model aimed at assessing the impact of the overlap period on the extension of the working time of the crews and the reduction of a repetitive project’s duration in random conditions. The purpose of simulation studies is to provide construction managers with guidelines when deciding on the dates of starting the sequential technological process lines realized by specialized working crews, for sustainable scheduling and organization of construction projects.

scholarly journals The Influence of the Use of Polymer Lining within the Roller Press Gravity Feeder on Briquette Quality

Polymers ◽  
2020 ◽  
Vol 12 (11) ◽  
pp. 2489
Author(s):  
Michał Bembenek
Keyword(s):  
Molecular Weight ◽  
High Molecular Weight ◽  
Material Flow ◽  
Laboratory Tests ◽  
Polymer Materials ◽  
Roller Press ◽  
Fine Grained ◽  
The Impact ◽  
Ultra High Molecular Weight

When considering the operation of roller presses for the consolidation of fine-grained materials, the main problems are disturbances in the proper flow of the material and its bridging in gravity feeders. This is especially true for small and medium capacity presses, where the hoppers for dosing the material are narrow. This article presents innovative laboratory tests of the impact of using a polymer plate lining in the gravity feeder of a roller press. Polymer materials Polyacetal C (POM C) and Ultra-High-Molecular-Weight Polyethylene (UHMW-PE) were used for the tests. The influence of the use of plates on the material flow and quality of briquettes was investigated in comparison with the case where such plates were not used. The research showed an improvement in the flow of fine-grained materials in the feeder and an increase of the briquette strength indexes, as compared to those cases when polymer linings were not used in the feeder.

scholarly journals Increasing the life of plunger and barrel assembly of high pressure fuel pumps

2021 ◽  
Vol 282 ◽  
pp. 07023
Author(s):  
M.N. Salikhova ◽  
V.A. Aleksandrov ◽  
V.S. Kukhar ◽  
I.P. Galchak ◽  
A.M. Chudinov
Keyword(s):  
High Pressure ◽  
Radial Force ◽  
Theoretical Studies ◽  
Specific Pressure ◽  
Technological Parameters ◽  
Subsequent Performance ◽  
Plunger Pair ◽  
Operating Modes ◽  
The Impact

In order to identify the regularities of further increasing the efficiency of transport and technological machines, it is of interest to consider the issues of determining the impact of their design and technological parameters on the quality of running-in and the operability of fuel pumps. The article analyzes the influence of the initial operating modes and the lubricating medium on the quality of running-in and subsequent performance of high-pressure fuel pumps. On the basis of theoretical studies, equations were obtained to determine the unbalanced radial force acting on the plunger and fuel leaks in the plunger pair. These expressions make it possible to establish the dependence of the specific pressure in the plunger and barrel assembly both on the design and technological parameters of the pump.

scholarly journals FROM COCOA TO CHOCOLATE

2015 ◽  
Vol 5 (2) ◽  
pp. 45-45
Author(s):  
Dijana Miličević ◽  
Sanja Oručević Žuljević ◽  
Zahida Ademović
Keyword(s):  
Rheological Properties ◽  
Human Health ◽  
Technological Process ◽  
Subject Matter ◽  
Cocoa Beans ◽  
Quality Properties ◽  
Basic Quality ◽  
Basic Characteristics ◽  
The Impact

THE CONTENT OF THE BOOK: The book has 290 pages, and the content is divided into 10 chapters. In the introductory chapters written something about the origin of cocoa beans, its basic characteristics, and the impact on human health. In subsequent following chapters describes the technological process of production of chocolate harvesting, fermentation and drying of cocoa beans, through its preparations in terms in the sense of burning and shredding, the production of cocoa powder and chocolate mass from it, and chocolate and chocolate products. In the book are described rheological properties as a very important factor in the quality of chocolate products, and finally an overview of some types of chocolate, as well as the basic quality properties of chocolate. The book has a large number of pictures, diagrams and tables which are complemented content of book. The book will be published on the website and will be accessible to anyone who is interested in its subject matter.

scholarly journals EFFICIENCY OF TECHNOLOGICAL PROCESS OF FORESTRY AND DEGREE EFFECTS OF TECHNOLOGICAL AND NATURAL FACTORS

2017 ◽  
Vol 7 (3) ◽  
pp. 167-175
Author(s):  
Иван Гарус ◽  
Ivan Garus ◽  
Шуфан Янь ◽  
Shufan Yan'
Keyword(s):  
Technological Process ◽  
Climatic Factors ◽  
Technological Development ◽  
Average Diameter ◽  
Point Of View ◽  
Forest Environment ◽  
Operator Training ◽  
Machine Systems ◽  
The Impact

When implementing the technological process in the forest for logging operations, various factors influence, as well as taxation indicators such as (average diameter, height of the stand, reserve per hectare, availability of growth, completeness, etc.), natural climatic factors (Soil type carrying capacity of soils, depth of snow cover, etc.), degree of operator training, etc. One of the main tasks of rational justification of the technological process of cutting areas development is to find and combine controlled factors, at which performance indicators would be extreme. The most suitable variant of the technological development of the cutting area assumes what should be the intensity of logging, the layout of the cutting area, the number of loading points, and the productivity of harvesting machines. This task will be solved taking into account the influence of logging equipment and technology on the forest environment. The state of the stand left for growing after selective felling and its further development depends on the machine systems used in logging operations. The most important factor in the development of felling areas is the degree of intensity of felling. Since the quality of logging operations will depend on the method of cutting in the development of the cutting area (from the point of view of the impact on the natural environment, the soil cover, the left part of the stand, the adolescent).

scholarly journals Influence of working bodies of technical means on injury and quality of seed of grain crops

2020 ◽  
Vol 11 (3) ◽  
pp. 49-54
Author(s):  
D. A. Derevianko ◽  
◽  
V. M. Polishchuk ◽  
O. D. Derevianko ◽  
◽  
...  
Keyword(s):  
Technological Process ◽  
Theoretical Calculations ◽  
Structural Parameters ◽  
Experimental Studies ◽  
Grain Crops ◽  
Transportation Process ◽  
Working Bodies ◽  
The Relationship ◽  
Harmful Effects

Theoretical calculations and experimental studies show that during the technological process of transporting seeds by technical means, in particular ladle conveyors, macro- and especially microtrauma of grains occurs, which affects a decrease in quality indicators. Analysis of the studies shows that the structural parameters of the working bodies, the biological and physico-mechanical properties of the kernels, as well as the material for the manufacture or coating of the working elements, affect the trauma and quality of the seeds. Experimental data showed that microtrauma of winter wheat grains before transportation was in the range of 22,9- 23,5%, and after completion of the transportation process was 45,3-46,4%, that is, doubled. Further studies to improve the quality of seeds of grain crops, reduce the harmful effects of microorganisms on caryopsis and reduce macro- and microtrauma should be carried out in the relationship and the complex of biological and physico-mechanical features of the entire technological process.

scholarly journals The effect of blow flies (Diptera: Calliphoridae) on the size and weight of mangos (Mangifera indicaL.)

PeerJ ◽  
2016 ◽  
Vol 4 ◽  
pp. e2076 ◽  
Author(s):  
Shafqat Saeed ◽  
Muhammad Nadir Naqqash ◽  
Waqar Jaleel ◽  
Qamar Saeed ◽  
Fozia Ghouri
Keyword(s):  
Positive Impact ◽  
Fruit Trees ◽  
Mango Fruit ◽  
Blow Flies ◽  
Hand Pollination ◽  
Fruit Setting ◽  
Fruit Orchards ◽  
Pollination Methods ◽  
The Impact

Background:Pollination has a great effect on the yield of fruit trees. Blow flies are considered as an effective pollinator compared to hand pollination in fruit orchards. Therefore, this study was designed to evaluate the effect of different pollination methods in mango orchards.Methodology:The impact of pollination on quantity and quality of mango yield by blow flies was estimated by using three treatments, i.e., open pollinated trees, trees were covered by a net in the presence of blow flies for pollination, and trees were covered with a net but without insects.Results:The maximum number of flowers was recorded in irregular types of inflorescence, i.e., 434.80 flowers/inflorescence. Fruit setting (bud) was higher in open pollinated mango trees (i.e. 37.00/inflorescence) than enclosed pollination by blow flies (i.e. 22.34/inflorescence). The size of the mango fruit was the highest (5.06 mm) in open pollinated tree than those pollinated by blow flies (3.93 mm) and followed by without any pollinator (3.18 mm) at marble stage. We found that the maximum weight of mango fruit (201.19 g) was in open pollinated trees.Discussion:The results demonstrated that blow flies can be used as effective mango pollinators along with other flies and bees. The blow flies have shown a positive impact on the quality and quantity of mango. This study will be helpful in future and also applicable at farm level to use blow flies as pollinators that are cheap and easy to rear.

scholarly journals The Influence of Temperature Differences in Smoking Chamber and Furnace and Smoking Time on the Quality of Medium-Ground Sausages

Molecules ◽  
2020 ◽  
Vol 25 (23) ◽  
pp. 5515
Author(s):  
Paulina Duma-Kocan ◽  
Mariusz Rudy ◽  
Marian Gil ◽  
Renata Stanisławczyk
Keyword(s):  
Chemical Composition ◽  
Technological Process ◽  
Significant Influence ◽  
Influence Of Temperature ◽  
Research Material ◽  
Texture Parameters ◽  
The Impact

The aim of the work was to determine the impact of two variants (A and B) of smoking (differing in temperature values, furnace, top and bottom of the smoking chamber and the length of smoking time) in the sausage technological process carried out in a traditional smoking chamber with an indirect furnace. The research material consisted of medium-ground sausages: Country, Home and Bieszczady sausages. The research showed that, as the temperature in the smoking chamber and the smoking time changed, the following texture parameters decreased: cycle hardness 1 and 2, springiness, gumminess and chewiness. In addition, there were shown statistically significant differences (p < 0.05) in the chemical composition of Country sausage between the applied smoking variants. It was also found that the temperature of the furnace, upper and lower smoking chamber and the length of smoking time did not have a statistically significant influence on the share of red (a*) and yellow (b*) in the analysed sausages.

Use of an air curtain to counteract the headwind when spraying field crops

2020 ◽  
pp. 72-82
Author(s):  
Yu. G. Vozhyk ◽  
P. I. Vitrukh ◽  
Yu. V. Kosovets ◽  
V. I. Panasyuk
Keyword(s):  
Wind Speed ◽  
Negative Impact ◽  
Plant Protection ◽  
Theoretical Calculations ◽  
Plant Protection Products ◽  
Field Crop ◽  
Air Velocity ◽  
Air Curtain ◽  
Operating Modes

Annotation Purpose. Improving the efficiency of field crop spraying and saving plant protection products by developing adaptations to field crop sprayers that will minimize the negative impact of headwind on the quality of this process. Methods. Theoretical calculations, their analysis and experimental verification. Results. The structural diagram of the method and device to the sprayer to create an air curtain was substantiated, which provided an increase in the allowable wind speed during spraying up to 7 m/s. Conclusions. It is established that with the use of a fan with a flow rate of 6000 m3/h, full air pressure of 6000 Pa and a reserve power of 30 kW of a tractor 1.4 class on the drive of the fan device to the sprayer, the maximum permissible diameter of the nozzle to create an air curtain is 0.02 m, and the sprayer grip width is 18 m. With the above parameters and operating modes of the air curtain and air velocity in nozzles of 30 m/s the air curtain can increase the permissible wind speed during spraying up to 7 m/s. Keywords: toxic chemicals, spraying, sprayer device, wind, air curtain, parameters, operating modes.

scholarly journals MODERN PRODUCTION TRENDS OF FERMENTED MEAT PRODUCTS

2019 ◽  
Vol 13 (4) ◽  
Author(s):  
L. Vinnikova ◽  
V. Mudryk ◽  
L. Agunova
Keyword(s):  
Technological Process ◽  
Raw Materials ◽  
Reductase Activity ◽  
Meat Products ◽  
Starter Cultures ◽  
Scientific Publications ◽  
Sanitary Condition ◽  
Physical Processing ◽  
The Impact

The work aims to the generalization and analysis of the main problems of production of fermented meat products, which are reflected in scientific publications of the meat processing industry experts. The modern researches of scientists all over the world are aimed to the achievement of bio- and microbiological safety, structure formation, use of new kinds of raw materials, features of color formation, formation of sensory properties, increase of biological value of smoked and uncooked products. The work emphasizes that the quality of finished products and the stability of the technological process depends on the quality of raw materials, the properties of their own microbiota of raw materials and/or introduced starter cultures of microorganisms. The possibility of improving the sanitary condition of raw materials and reducing the impact of pathogenic microorganisms due to the use of ultrasound, hydrostatic high pressure, high-intensity pulsating electric field, cold plasma are described in the work. Also, in addition to physical processing methods, the use of competing microflora, extracts of spicy-aromatic plants, combining salt mixtures, packaging are effective. It is stated that the formation of the structure of the finished product depends on the parameters of the technological process, the activity of exo-endoenzymes and prescription composition. It is shown that the color of fermented meat products and their stability depend on the content of natural pigments and the conditions of their interaction with nitrites under the action of microorganisms with nitrite reductase activity and pH of the environment. The possibility of obtaining a characteristic pink-red color of meat products without the use of nitrites was noted. The results of investigations of the possibility of varying the organoleptic parameters of the finished product by modeling the ingredient composition and fermentation conditions are presented. The possibilities of creation of new types of fermented meat products of functional purpose by the introduction of ω-3 fatty acids, probiotics, macro-, microelements and more are described.

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