Articoli di riviste: "Sealing compounds"

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Vasilovskaya, Galina, Maria Berseneva, Nadezhda Klinduh e Irina Terekhova. "Sealing mastics for road surfacing in Siberian regions". E3S Web of Conferences 97 (2019): 06024. http://dx.doi.org/10.1051/e3sconf/20199706024.

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This paper provides the results of the studies of polymer-bitumen sealing compounds for sealing seams and cracks in asphalt con-crete road. The polymers used were waste from Krasnoyarsk factories (rubber-fabric and butyl-rubber crumbs) and Tomsk factories (polyethylene waste and atactic polypropylene). Here we formulate the basic require-ments for sealing compounds applied in the Siberian regions. An experi-ment has been carried out with the use of the planning method, we pre-pared the compounds and determined their basic properties, as well as plot-ted the isolines of the compounds’ properties depending on the proportion-ing of mineral powder and polymer waste. Based on the analysis of the iso-lines and comparing the properties with the requirements, we selected the optimal compositions of the prepared sealing compounds and defined their core indicators. As a result of the research, the mastic based on butyl-rubber crumbs was chosen as the one meeting all the requirements by all the indicators. This paper reflects the results of the test surveys on pouring cracks in the road surface of Krasnoyarsk. The developed sealing com-pound has been adopted in production on the roads of Krasnoyarsk Territo-ry.

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Ogar, P. M., V. S. Fedorov, A. S. Kozhevnikov e K. N. Figura. "Determination of contact sealing pressures at the stage of sealing compounds design". Systems. Methods. Technologies, n. 4(40) (2018): 7–12. http://dx.doi.org/10.18324/2077-5415-2018-4-7-12.

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Li, Lingshan, Mei Fan, Yan Xu, Liang Zhang, Yu Qian, Yongqing Tang, Jinsong Li, Jinsong Zhao, Siqi Yuan e Jun Liu. "Comparative Analysis of Volatile Flavor Compounds in Strongly Flavored Baijiu under Two Different Pit Cap Sealing Processes". Foods 12, n. 13 (1 luglio 2023): 2579. http://dx.doi.org/10.3390/foods12132579.

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The solid-state fermentation process of strongly flavored Baijiu is complicated by the co-fermentation of many different microorganisms in the fermentation pools. The traditional fermentation pools of strong flavor Baijiu are sealed with mud, and this sealed-pit mud is not easy to maintain; therefore, the pit cap is prone to cracks and to caving in. The destruction of the sealed-pit mud may lead to instability in the composition and an abundance of microorganisms in the fermentation process that results in fluctuations of product quality. Thus, the production method of replacing the mud cap with a new steel cap is gradually attracting the attention of scientific and technical workers in the industry. However, so far, there have been relatively few reports on the use of steel lids for sealing pits for fermentation and brewing. In this study, the volatile flavor components of 270 Baijiu samples from mud-sealing and steel-sealing pits of a Chinese Baijiu distillery were studied qualitatively and quantitatively using Gas Chromatography–Mass Spectrometry (Abbreviated as GC-MS). Our statistical methods included Hierarchical Cluster Analysis (Abbreviated as HCA), Principal Component Analysis (Abbreviated as PCA), and Discriminant Analysis (Abbreviated as DA). A statistical analysis was carried out on the yield of strongly flavored Baijiu, and we made a comprehensive evaluation of the Baijiu produced under the two pit-sealing modes with regard to flavor and economic efficiency. The yield of strong flavored Baijiu was 6.7% higher with steel-sealing pits compared with mud-sealing pits. Cluster analysis categorized the strongly flavored Baijiu samples into two categories initially: (1) samples produced using mud-sealing pits and (2) samples using steel-sealing pits. Our analysis also indicated that the 28 compounds used for quantification were selected correctly. Surprising to the experimental staff, the overall score for the steel-sealing pits was greater than that of the mud-sealing pits based on PCA. Using DA, the prediction results were 100% accurate. In summary, through a comparative analysis of the flavor and yield, which are the two main factors that affect the quality of Baijiu in a distillery, and systematic combination at both experimental and theoretical levels, the differences between the Baijiu production by steel-sealing and the traditional mud-sealing were clear. Regardless of the impact of age, the detectable flavor components of Baijiu from the mud-steeling pits were very consistent with those of the steel-sealing pits in terms of richness or concentration. However, steel-sealing pits were significantly superior to mud-sealing pits with respect to output, consistency in quality, and cost (human and economic) savings.

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Forney, Charles F., James P. Mattheis e Rodney K. Austin. "IDENTIFICATION OFVOLATILE COMPOUNDS RESPONSIBLE FOR OFF-ODORS PRODUCED BY BROCCOLI STORED IN ANAEROBIC CONDITIONS". HortScience 26, n. 6 (giugno 1991): 700G—701. http://dx.doi.org/10.21273/hortsci.26.6.700g.

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Broccoli (Brassica oleracea L., ltalica Group) produces severe off-odors when it is stored under anaerobic conditions which can develop in modified atmosphere packages. The compounds responsible for these off-odors, which render the broccoli unmarketable, were produced after sealing 50 g of fresh broccoli florets in glass pint jars held at 15C. Twenty-four hours after sealing oxygen concentration dropped to around 0.5% and remained at this concentration for 6 days. Volatile compounds found in the head space of the jars were identified using gas chromatography with flame photometric and mass spectroscopic detection. Volatile compounds produced were identified as methanethiol, hydrogen sulfide, dimethyl disulfide, acetaldehyde, acetone, ethanol, and ethyl acetate. Methanethiol was detected 48 hours after sealing and appears through olfactory evaluation to be the primary compound responsible for the objectionable odor.

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Hisiory, A. Case, e Michael R. Lake. "VOC Emission Controls for Can End Sealing Compounds". Journal of the Air Pollution Control Association 36, n. 12 (dicembre 1986): 1397–402. http://dx.doi.org/10.1080/00022470.1986.10466191.

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Telin, A. G., A. A. Politov, A. V. Kornilov, L. E. Lenchenkova, R. N. Yakubov e R. M. Safuanova. "PROCESSING OF NATURAL RENEWABLE MATERIALS INTO GROUTING COMPOUNDS FOR WATER SHUTOFF IN OIL WELLS". Petroleum Engineering 21, n. 3 (17 agosto 2023): 17–26. http://dx.doi.org/10.17122/ngdelo-2023-3-17-26.

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Water shutoff in oil wells operated in naturally fractured reservoirs is one of the most complex types of geological and technical operations in the oil industry related to repair and insulation works, the success rate of which does not exceed 35–60 %. In order to increase the efficiency of such operations, a set of sealing compositions based on the processing of natural materials, such as sand, peat, rice husk is proposed. Using the methods of mechanochemical activation, it was possible to dissolve sand in a low-concentrated alkali and obtain a sealing compound reinforced with undissolved sand particles by gelating the resulting sodium silicate. When combining mechanically activated sand and peat, a hybrid sealing material with the ultimate shear stress 27.7±1.2 Pa was obtained. The same approach made it possible to activate rice husks containing up to 20 % biogenic silicon dioxide and obtain a hybrid sealing material with the ultimate shear stress of 16.2 ± 0.6 Pa. This makes it possible to consider materials from natural and plant-renewable raw materials very promising for repair and insulation work.

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Deaconescu, Andrea, e Tudor Deaconescu. "Tribological Behavior of Hydraulic Cylinder Coaxial Sealing Systems Made from PTFE and PTFE Compounds". Polymers 12, n. 1 (7 gennaio 2020): 155. http://dx.doi.org/10.3390/polym12010155.

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Current trends concerning hydraulic cylinder sealing systems are aimed at decreasing energy consumption which can be materialized by minimizing leaks and reducing friction. The latest developments in the field of materials and sealing system geometries as well as modern simulation possibilities allow maximum performance levels of hydraulic cylinders. Reducing friction is possible by hydro-dynamic separation of the sliding and sealing points already at very low velocities and by using materials, such as plastomers, from polytetrafluoroethylene (PTFE) (virgin PTFE and filled PTFE). It is within this context that this paper discusses a theoretical and experimental study focused on the tribological behavior of coaxial sealing systems mounted on the pistons of hydraulic cylinders. It presents a methodology for the theoretical determination of the lubricant film thickness between the cylinder piston and the seal. The experimental installation used for measuring fluid film thickness is presented, and the results obtained under various working conditions are compared to the theoretical ones. For the analyzed working conditions related to pressure, speed, and temperature, the paper concludes with a set of criteria for the selection of the optimum seal material so as to maximize energy efficiency.

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Walker, F. J. "Effects of Bio-Fuels on Common Static Sealing Elastomers". Rubber Chemistry and Technology 82, n. 3 (1 luglio 2009): 369–78. http://dx.doi.org/10.5254/1.3548252.

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Abstract The purpose of this investigation was to explore the effects of bio-fuels on several common static sealing elastomers. This study explored ethanol-enriched gasoline and soy-based diesel. Exposed to these fuels were fifteen common static sealing elastomer compounds. These were comprised of eight FKM compounds, and two NBR compounds. In addition, other compositions were also included in the study. These comprised VMQ, FVMQ, AEM di-polymer, HNBR and a high temperature ACM. The percentage of ethanol enrichment was varied from zero to 100 percent. The bio-diesel section of this study examined comparative effects of conventional low-sulfur diesel, twenty percent soy diesel, and 100 percent soy diesel. Effects on conventional mechanical properties of hardness, tensile strength, elongation and volume change were measured.

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Rost, H. C. "Biofuel Compatibility of Sealing Materials at Low Temperatures". International Polymer Science and Technology 44, n. 11 (novembre 2017): 1–4. http://dx.doi.org/10.1177/0307174x1704401101.

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The combination of very good biofuel compatibility with excellent low-temperature properties is of major importance to the automotive industry. Changes in the regulatory framework and the tapping of new markets have increasingly led to new developments in this field. Parker has developed FKM compounds with TR10 values of −30°C, −35°C, −40°C and −45°C, which display only slight changes in physical properties upon storage in FAM B, E85 and KGS (VW first fill fuel). The sealing performance of these compounds at very low temperatures was investigated in compression set tests from −25°C down to −50°C.

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Gladkikh, S. N., E. N. Basharina, E. V. Vishnevskaya, T. A. Islent’eva e V. V. Mironovich. "Elastic transparent compounds for sealing elements of electro radio products". Polymer Science Series D 5, n. 1 (gennaio 2012): 38–41. http://dx.doi.org/10.1134/s1995421212010054.

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Pereira, Bruno, Paulo Lopes, Juliana Marques, Maria Pimenta, Cátia Alves, Isabel Roseira, Adélio Mendes e Miguel Cabral. "Sealing effectiveness of different types of closures towards volatile phenols and haloanisoles". OENO One 47, n. 2 (30 giugno 2013): 145. http://dx.doi.org/10.20870/oeno-one.2013.47.2.1545.

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Aim: To determine if aerial contamination can induce the migration of volatile compounds through wine closures after bottling.Methods and results: Bottled white wines sealed with cork stoppers (natural and microagglomerate), synthetic closures and screw caps were stored under an environment contaminated with three deuterium-labeled compounds : (d5)-2,4,6-trichloroanisole (d5-TCA), (d4)-4-ethylphenol (d4-E4P) and (d5)-4-ethylguaiacol (d5-E4G). Wines, closure sections (outer, middle and inner) and screw cap liner were assessed over time for the concentration of different compounds by solid phase microextraction-gas chromatography-mass spectrometry (SPME-GC-MS). The results collected during 30 months of storage showed that large amounts of all compounds were essentially retained in the outer portion of cylindrical closures, both cork and synthetic. However, these compounds were able to penetrate through synthetics and screw caps and contaminate the wine.Conclusion: Cork stoppers have proven to be an effective barrier to the migration of aerial volatile compounds such as d5-TCA, d4-E4P and d5-E4G, whereas permeable closures such as synthetic and screwcap saranex did allow the migration of those compounds into bottled wines.Significance and impact of the study: This study provides practical information about the sealing properties of different closures for a sound decision-making with regard to packaging. To the best of our knowledge, this is the first report of post-bottling aerial contamination via migration of volatile compounds through wine closures.

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Deaconescu, Andrea, e Tudor Deaconescu. "Optimum Design of Coaxial Hydraulic Sealing Systems Made from Polytetrafluoroethylene and Its Compounds". Coatings 14, n. 6 (5 giugno 2024): 723. http://dx.doi.org/10.3390/coatings14060723.

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Fluidic actuation systems are optimizable as to energy consumption by reducing the friction in the hydraulic cylinders. Polymeric materials with special antifriction properties and good resistance to hydraulic fluids can be deployed to enhance the performance of hydraulic cylinders. Small friction forces can also be ensured by facilitating the hydrodynamic separation of the elements of the friction tribosystem, namely the seal and sealed-off surface, respectively. The study presented in this paper analyzed the hydrodynamic separation phenomenon in hydraulic cylinders with coaxial sealing systems of the pistons. The process underlying the forming of the fluid film between the seal and its contact surface was considered and the formula for calculating film thickness was deduced. This paper presents graphs that describe the variation of the fluid film thickness versus the dimensional and material characteristics of the sealing systems. The study yielded recommendations as to the most adequate polymeric material to be used and the optimum dimensional characteristics of the seal.

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Boegelsack, Nadin, James Walker, Court D. Sandau, Dena W. McMartin, Jonathan M. Withey e Gwen O’Sullivan. "Cross-Contamination of Ignitable Liquid Residues on Wildfire Debris—Effects of Packaging and Storage on Detection and Characterization". Separations 11, n. 2 (13 febbraio 2024): 58. http://dx.doi.org/10.3390/separations11020058.

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Producing defensible data for legal proceedings requires strict monitoring of sample integrity. In fire debris analysis, various approved packaging and storage solutions are designed to achieve this by preventing cross-contamination. This study examines the efficiency of current practices at preventing cross-contamination in the presence of a sample matrix (charred wood) via analysis by comprehensive multidimensional gas chromatography coupled with time-of-flight mass spectrometry (GC×GC-ToF MS). The transfer of ignitable liquid residue (ILR) was assessed by comparing percentages of the target ILR area relative to the total chromatogram area and applying chemometric tools developed to detect cross-contamination. All practices reduced cross-contamination in comparison to faulty packaging. Individual practices varied in their performance. Nylon-based packaging performed best, whereas commercial polyethylene-based packaging performed worst due to interfering compounds emitted from the material and sealing mechanism. Heat-sealing was the best sealing mechanism when applied correctly, followed by press-fit connections, and lastly, adhesive sealing. Refrigerated storage offered several advantages, with elevated impact for polyethylene-based packaging and adhesive sealing mechanisms. Triple-layer packaging practices did not show significant benefits over double-layers. The recommended packaging approach based on these findings is mixed-material packaging (metal quart can in a heat-sealed nylon bag), offering advanced prevention of cross-contamination and practical advantages with continued refrigeration during transport.

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Müller, Julian, Rene Illek, Gordana Michos, Karsten Faust, Markus Hubert e Jörg Franke. "A System Embracing Observation of Different PTFE-Compounds in the Sealing Application of Rotary Manifolds". Applied Mechanics and Materials 805 (novembre 2015): 123–30. http://dx.doi.org/10.4028/www.scientific.net/amm.805.123.

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Due to the increase of product complexity, 5 axes machining centers are becoming more and more important. Rotary tables are usually chosen for the 4th and 5th axis. Additional hydraulic or pneumatic mounting clamps are often needed on these tables. The feeding of the required media is realized by a so-called rotary manifold. For this application, commonly several rotary seals are used to seal the transmitted media. Different sealing materials, based on the carrier polymer PTFE, have been examined during this research. In tribological model tests, friction and wear characteristics have been investigated during an oscillating movement under dry run conditions and equal load spectrums (surface pressure). The counter running surfaces were specific textured as a result of various machining processes to research the effects of possible micro-and macroscopic patterning on the sealing system. The tribological behavior of the analyzed combinations and the topography of the counter surfaces have been evaluated.

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Nguyen, Van Tuan, Quy Le Thu, Tuan Anh Nguyen, Quoc Cuong Ly, Ly Pham Thi, Ha Pham Thi e Thanh Dinh Thi Mai. "Arc Thermal Spray NiCr20 Alloy Coating: Fabrication, Sealant, Heat Treatment, Wear, and Corrosion Resistances". International Journal of Electrochemistry 2019 (27 gennaio 2019): 1–8. http://dx.doi.org/10.1155/2019/8796958.

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This study presents the effect of heat treatment on porosity, phase composition, microhardness, and wear and corrosion resistances of the thermal sprayed NiCr20 coating after sealing with aluminum phosphate. The annealing temperatures were varied in a range of 400 to 1000°C. The obtained results indicated the porosity of coating decreased with increasing the annealing temperature. After treatment at temperatures in range of 800-1000°C, more than 90% of initial pores in the coating were successfully filled with the sealants. The XRD data revealed not only the formation of new phases of other compounds, but also the interaction between coating and sealant. After heat treatment, wear resistance of coating was 12 times higher than that without heat treatment. The corrosion test in H2SO4 solution indicated that the presence of sealant in coatings increased their corrosion resistance. From these findings, application of these NiCr20 coatings to protect steel against wear and corrosion appears very promising.

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MELNIKOV, OLEG M. "IMPROVING SEALING ELEMENTS OF THE BEARING ASSEMBLY OF AGRICULTURAL MACHINERY". Agricultural engineering, n. 3 (2022): 68–72. http://dx.doi.org/10.26897/2687-1149-2022-3-68-72.

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At present, it is necessary to improve not only repair technologies, but also consider the possibility of using various modified materials to increase the post-repair reliability of agricultural machinery. One of the ways to improve the rubber seals of bearing assemblies is to modify them by adding organofluorine compounds to the rubber composition, which have a complex effect on rubber, improve its physical, mechanical, and tribological properties. To determine the modification effect of seals on friction and wear, the author tested joints consisting of a steel bushing with a diameter of 45 mm with a surface hardness of at least HRC32 and collars of three types: serial (GOST 8752-79); modified with alcohol-telomer (FS-1) and fluoroparaffin (FS-2) in the amount of one mass part of PS per 100 mass parts of rubber. The collar wear was determined by changing the width of the working edge, measured by DIP-6 with the optoelectronic measuring system NIIK-890. Bench tests showed that volumetric modification with organofluorine compounds improved the properties of rubber: the wear of modified seals decreased in 1.83…1.94 times compared to serial ones, friction coefficient decreased in 1.32…1.37 times

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Egorov, Evgeny N., Nikolay F. Ushmarin, Konstantin V. Efimov, Sergey I. Sandalov, Ivan S. Spiridonov e Nikolay I. Koltsov. "The influence of functional ingredients on the technological properties of water-swelling rubber sealing elements". Butlerov Communications 58, n. 6 (30 giugno 2019): 146–51. http://dx.doi.org/10.37952/roi-jbc-01/19-58-6-146.

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The article investigated the influence of the nature and content of coutchoucs, sevilens, vulcanizing groups, fillers, plasticizers, ingredients of directional action on the technological properties (plasticity, ring modulus, density, start time of vulcanization, stickiness) of two rubber mixtures. These indicators characterize the processability of rubber compounds in the manufacture of products from them. The study was conducted in order to select the basis of rubber compounds for the manufacture of the outer and inner layers of water-swellable sealing elements (WSSE). It has been established that rubber compounds for the outer layer based on butadiene-nitrile BNKS-18AMN, isoprene SKI-3 and ethylene-propylene SKEPT-40 coutchoucs, as well as the inner layer of WSSE based on butadiene-nitrile BNKS-18AMN, butadiene methylstyrene SKMS-30ARK and ethylene-propylene SKEPT-40 rubbers possess satisfactory technological properties. It was shown that these rubber mixtures which contain sevilen 11808-340, a vulcanizing group (sulfur + thiazole 2 MBS + guanid F), a combination of fillers (talc + grew 175 + Karelite MK), petroleum resin Sibplast, directional ingredients (vermiculite + needle punched cloth “Oksipan”), hydrosorption additives (polyacrylamide AK 639 + sodium polyacrylate), have improved technological properties. These rubber mixtures can be recommended as the basis for the manufacture of the outer and inner layers of water-swelling sealing elements for the oil and gas industry.

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KYDYRALIEV, A. SH, O. K. BEISENBAYEV, K. S. NADIROV e G. ZH BIMBETOVA. "OBTAINING ELASTOMERIC CORONOELECTRETES FOR SEALING UNITS OF OILFIELD EQUIPMENT". Neft i Gaz 129, n. 3 (15 giugno 2022): 84–96. http://dx.doi.org/10.37878/2708-0080/2022-3.07.

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The article discusses the issues of obtaining elastomeric coronoelectretes for sealing units of oilfield equipment. In the conditions of collecting and preparing oil in the fields, the issues of using products based on rubber compounds for sealing during the operation of equipment in direct contact with the borehole fluid, which is to a certain extent an aggressive environment, are relevant. The composition of a polymer elastomeric coronoelectret for sealing units of oil industry equipment has been developed. The composite is based on low-density polyethylene, butadiene - nitrile synthetic rubber of the BNKS-18AMN brand, ethylene copolymer with vinyl acetate (savylene 11104-030), technical gossypol, organic modifiers. The effect of additives on the electret properties of composites is shown. Based on experimental data, it was found that the resulting composite material based on modified low-density polyethylene, savylene, technical gossypol, organomodified layered silicates, butadiene-nitrile rubber in the electret state has sufficient resistance, and giving them an electret state additionally reduces the amount of their swelling in the conditions of production of borehole products.

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Gottmann, Jörg, David Müller, Anna Maria Becker, Jochen Vestner, Jens Schuster e Ulrich Fischer. "Improved sealing polymers and cleaning procedures to mitigate aroma carryover during bottling of aromatised and regular wines on the same filling line". OENO One 56, n. 4 (24 ottobre 2022): 41–54. http://dx.doi.org/10.20870/oeno-one.2022.56.4.5579.

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Bottling of aromatised wines and regular table wines often takes place on the same bottling line. Installed sealings in the bottling line absorb volatiles from aromatised wines and, due to inadequate cleaning, carryover occurs into the subsequently bottled regular wine. This unintentional carryover can lead to accusations of illegal flavouring of wine. To minimise the carryover risk, sealing materials that absorb less volatiles are beneficial. Incorporating kaolin and micro-cellulose into the ethylene propylene diene monomer rubber (EPDM) network decreased absorption of the critical α-ionone by 51 and 60 %, respectively.Besides the minimisation of the absorption, a performed cleaning can reduce aroma carryover. So far, knowledge about cleaning parameters that can increase cleaning efficiency is limited since cleaning usually focuses on surficial removal and prevents microbiological cross-contamination. An evaluation of the cleaning parameters, temperature, time and agents clearly revealed a high factor in the considered temperature. The highest cleaning efficiency was seen at 85 °C, whereas the cleaning additives such as citric acid, caustic soda, ozone or dissolved carbon dioxide had no impact. High proportions of the aroma compounds were removed from the polymer in the first 20 min at 85 °C, but none of the performed cleaning sequences was able to remove all compounds.

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Püttmann, Wilhelm, e Rolf Bracke. "Extractable organic compounds in the clay mineral sealing of a waste disposal site". Organic Geochemistry 23, n. 1 (gennaio 1995): 43–54. http://dx.doi.org/10.1016/0146-6380(94)00106-b.

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Fujiwara, Masahiro, Tsuyoshi Kitabayashi, Kumi Shiokawa e Takayo K. Moriuchi. "Sealing and reopening of micropores of mordenite and ZSM-5 by disilylbenzene compounds". Microporous and Mesoporous Materials 115, n. 3 (novembre 2008): 556–61. http://dx.doi.org/10.1016/j.micromeso.2008.02.034.

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Kim, Yoo Tack, e Jun Young Park. "Effect of Calcium Compounds on Mechanical Properties of Eco-Friendly Non-Cement Mortar". Materials Science Forum 804 (ottobre 2014): 71–74. http://dx.doi.org/10.4028/www.scientific.net/msf.804.71.

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Improvement in the mechanical properties of non-cement mortars using ASTM Class C fly ash (FA) containing high amounts of CaO produced from a fluidized bed-type boiler and blast furnace slag (BS) was studied. This type of FA has been used to carbonate non-cement mortar under supercritical conditions for CO2 fixation, because such mortars cannot be recycled and easily reclaimed owing to the presence of high amounts of CaO that may adversely affect their eco-friendliness because of the high volume expansibility of CaO. Because a substantial increase in the compressive strength was observed for the specimen containing 20% FA, two types of Ca compounds—CaO and Ca (OH)2—were added to the BS specimens to investigate the effects of Ca compounds on the mechanical properties of non-cement mortar specimens. Three types of curing methods—room temperature, room temperature with hermetic sealing, and high temperature with hermetic sealing—were used and the specimens were aged for 3, 7, and 28 days. Because both CaO and Ca (OH)2 enhance the compressive strength at the concentration corresponding to that in the FA, it is speculated that the amorphous materials in the BS is destroyed without adding any acid or reagents because of the increase in pH by the Ca compound present in the specimen. An increase in the specimen pH may affect the strength improvement because of ion elution and curing reaction. It is concluded that enhancement in the mechanical property by the addition of 20% FA to BS can be explained from the results obtained by adding Ca compounds.

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Kasi, Elangovan, e Mohan Ramakrishnan. "Studies on Fluorocarbon Elastomer Nanocomposites for Sealing Applications". Materiale Plastice 58, n. 4 (4 gennaio 2022): 171–78. http://dx.doi.org/10.37358/mp.21.4.5542.

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The usage of seals in several applications like aircraft engines is mostly made of Fluorocarbon (FKM) elastomer. They are coloured products that enable easier identification based on the applications. In such seals, fillers like carbon black cannot be added to reinforce and improvise the mechanical properties since carbon black does not make it possible to add colours. The properties after ageing are also very critical in sealing application, and they must also be improved. Also, Nanocomposites are the modern and growing trends in the field of polymers that show enormous changes in the properties of the polymers without affecting their basic properties. So, the need for improvisation of FKM seals and the concept of Nanocomposites can be merged to form FKM Nanocomposites with Nano clay and Nano silica as the fillers. The objective of this project is to improve the mechanical properties, better retention of properties after ageing and after fluid interaction of the FKM seals with the aid of Nanofillers. Different proportions of FKM nanocomposites were prepared using modified Nano Kaolin Clay & modified Montmorillonite clay (Cloisite grades). Various mechanical properties like tensile strength, tensile modulus, elongation at break, compression set and tear strength etc., were studied. The test results have shown good improvements while increasing the filler loading. This is helpful to manufacture seals of desired colours thereby avoiding the difficulties faced in the carbon black-filled FKM compounds.

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Spanheimer, Vanessa, Gamze Gül Jaber e Danka Katrakova-Krüger. "Ground Tire Rubber Particles as Substitute for Calcium Carbonate in an EPDM Sealing Compound". Polymers 15, n. 9 (3 maggio 2023): 2174. http://dx.doi.org/10.3390/polym15092174.

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Ground tire rubber (GTR) is a product obtained by grinding worn tire treads before retreading them or via the cryogenic or ambient temperature milling of end-of-life tires (ELTs). The aim of this study is to evaluate if calcium carbonate can be substituted by GTR and, if so, to what extent. Different types of ground tire rubber are incorporated in an EPDM (ethylene–propylene–diene–rubber) model compound as partial or complete substitutes of calcium carbonate. The raw compounds and the vulcanizates are characterized to identify the limits. In general, it is apparent that increasing amounts of GTR and larger particles degrade the mechanical properties. The GTR also influences the vulcanization kinetics by reducing the scorch time up to 50% and vulcanization time up to nearly 80%. This is significant for production processes. The compounds with one-third substitution with the smaller-particle-size GTR show mostly similar or even better properties than the reference.

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Andriasyan, Yu O., E. G. Nesterova, A. A. Popov, A. P. Bobrov e Yu G. Moskalev. "A New Chlorine-Containing Rubber for Compounds in the Sealing Layer of Radial Tyres". International Polymer Science and Technology 35, n. 3 (marzo 2008): 1–2. http://dx.doi.org/10.1177/0307174x0803500301.

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Абдулина, Ю., Y. Abdulina, С. Григорьев, S. Griroriev, П. Панфилов e P. Panfilov. "Estimates of the strength of the connection «enamel — plomb» and «dentin — plomb» in permanent teeth in middle age after etching gel containing Ag". Actual problems in dentistry 12, n. 1 (25 marzo 2016): 4–10. http://dx.doi.org/10.18481/2077-7566-2016-12-1-4-10.

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The summary The study of features of strength and microstructure of joints «enamel-filling» and «dentin-sealing» after the etching treatment agent containing Ag. Samples of tissues were fixed with adhesive composite material for mechanical testing in uniaxial compression. The study shows that the content of the etching agent, silver does not affect the bond strength of dentin with composite material. Metallographic investigation of the microstructure of the joints and the bordering regions of dentin showed the status of the border and its ability to suppress the growth of cracks. In the work by means of optical and scanning electron microscopes, microstructure of studied compounds affected dentine secondary caries in permanent teeth close to the border «dentin-sealing» after the etching treatment agent containing Ag. The presence in the etching agent nanocolloidal silver does not affect the adhesive strength of the boundary of the hard tissues of the tooth with a composite material and does not change the color of the hard tissues.

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Egorov, Evgeny N., Nikolay F. Ushmarin, Sergey I. Sandalov, Ivan S. Spiridonov e Nikolay I. Koltsov. "The influence of functional ingredients on the technological properties of water-oil-swelling rubber sealing elements". Butlerov Communications 57, n. 1 (31 gennaio 2019): 95–100. http://dx.doi.org/10.37952/roi-jbc-01/19-57-1-95.

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The article examines the influence of the nature and content of caoutchoucs, sevilen, vulcanizing group, fillers, plasticizers, directional ingredients on the technological properties (plasticity, annular modulus, density, start time of vulcanization, stickiness) of two rubber compounds. The study was conducted in order to select the basis of rubber mixtures for the manufacture of the outer and inner layers of water-oil-swellable sealing elements (SWOE) for the oil and gas extraction industry. It was established that the rubber mixture for the outer layer of SWOE on the basis of butadiene-nitrile BNKS-18AMN, isoprene SKI-3 and butadiene SKD caoutchoucs, and also the rubber mixture for the inner layer of SWOE on the basis of butadiene-nitrile BNKS-18AMH, butadiene-methyl styrene SKMS-30ARK and butadiene SKD caoutchoucs have satisfactory technological properties. It was shown that these rubber mixtures containing sevilen 11808-340, a vulcanizing group (sulfur + thiazole 2 MBS + guanid F), a combination of fillers (carbon black P 514 + grew 175 + talc + Karelit MK), petroleum resin "Sibplast", directional ingredients (vermiculite + needle punched cloth “Oxypan”), sorption additives (polyacrylamide AK 639 + sodium polyacrylate + perlite + reagent “Kometa-R” + modified silica gel), are characterized by improved technological properties. These rubber compounds can be recommended as the basis for the manufacture of the outer and inner layers of water-oil-swelling sealing elements.

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Handayani, H., M. I. Fathurrohman, A. Ramadhan e N. A. Sutisna. "Effect of Organomodified Bentonite/Silica Hybrid Filler Compound System on Mechanical Properties and Sealing Performance of NR/NBR Rubber Seal for LPG Tube Valve". Asian Journal of Chemistry 34, n. 11 (2022): 2879–86. http://dx.doi.org/10.14233/ajchem.2022.23881.

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Organomodified bentonite and silica were used as hybrid fillers in natural rubber (NR)/nitrile butadiene rubber (NBR) seal for liquified petroleum gas (LPG) tube valve compound to evaluate their interaction and influence on mechanical properties and sealing performance. In this work, the NR-organomodified bentonite were prepared by the in situ organomodified and latex compounding method with varying amounts of bentonite then applied in the silica-NR/NBR rubber seal compounds with mixing process held in two rolls open mill. Silanization reaction, Payne effect, curing characteristics, tensile properties, compression set, hardness, uniaxial compression and sealing performance were assessed. The study obtained that NR/NBR-silica/organomodified bentonite show improved silica dispersion physically, as analyzed by Payne effect. The presence of organomodified bentonite decreases the vulcanization reaction. The cure rate index, apparent crosslink density and hardness tend to decrease with addition of organomodified bentonite, while tensile strength and elongation at break are enhanced with increasing organomodified bentonite. With an appropriate amount of organomodified bentonite (organomodified bentonite below 4 phr), the introduction of organomodified bentonite enhances the elastic response of the material, as shown by increasing of tensile properties. The rubber seal’s sealing performance analysis revealed that B4 (4 phr organomodified bentonite) performed the best, with contact stress higher than the actual working pressure and Misses stress lower than the actual working pressure, making it difficult to crack.

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29

Macaluso, Monica, Nicola Mercanti, Giulio Scappaticci, Elena Lannocca, Linda Rossi, Luca Guidi, Paolo Tondello, Francesco Brazzarola e Angela Zinnai. "Sealing Wax and Bottles in Bags—A Paradigm Shift in Refined Olive Oil Packaging: Preliminary Results". Foods 12, n. 22 (17 novembre 2023): 4161. http://dx.doi.org/10.3390/foods12224161.

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Generally, olive oil possesses natural protection against oxidation due to antioxidant compounds such as phenols and tocopherols. However, in the case of refined olive oil, the refining process unavoidably reduces the presence of these compounds. Considering these considerations, the objective of this study was to address the issues related to the “tightness” of the cap used for packaging oil in SALOV, aiming to extend the product’s shelf life. The oil under investigation was packaged in 250 mL transparent glass bottles, each filled with either argon or air. Subsequently, the samples were divided into three groups: one group sealed with a conventional screw cap, another covered with a special protective bag, and a third one sealed with a wax cover directly on the cap. The storage period varied, during which the atmospheric conditions were monitored daily through both destructive and non-destructive analyses. The preliminary results indicate that alternative preservation techniques, such as the use of argon, sealing wax, and protective bags, can effectively enhance the shelf life of the oil and maintain its quality (reduce oxidation, preserve phenolic compounds, and reduce the degradation of pigments). Further research and development in this area could lead to the production of high-quality extra virgin olive oils with extended shelf life and improved sensory and nutritional properties.

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Tsuchihashi, Hitoshi, Munehiro Katagi, Mayumi Nishikawa, Michiaki Tatsuno, Hiroshi Nishioka, Akishi Nara, Etsuo Nishio e Chris Petty. "Determination of Methamphetamine and its Related Compounds Using Fourier Transform Raman Spectroscopy". Applied Spectroscopy 51, n. 12 (dicembre 1997): 1796–99. http://dx.doi.org/10.1366/0003702971939857.

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Fourier transform Raman spectroscopy (FT-Raman) is investigated as a simple and rapid method for the determination of the abused drug methamphetamine and its related compounds. Compounds can be reliably identified by using measurements made nondestructively and without the need for any sample preparation in around 1 min. The Raman spectrum of methamphetamine hydrochloride (MA) shows clear differences in spectra from a range of its related compounds such as amphetamine sulfate and ephedrine hydrochloride. These differences are adequate for spectral differentiation of the compounds. With the use of the FT-Raman technique, MA is also reliably identifiable to a detection limit of 1% (w/w) diluted in sodium chloride or water. FT-Raman spectra of MA were recorded through plastic packaging (polyethylene or polypropylene bags) typical of that used either by criminals for transportation or by law enforcement for containing and sealing evidence. Measurements could be made directly without removing the drug from the bag; excellent-quality spectra could be obtained with very little perturbation by the plastic bag.

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UNO, Kiyofumi, Kensaku ITO, Hiromi KITANO e Shigeyoshi YOSHIOKA. "Analysis of Stains on Surface of Polymer-coated Aluminum Panel Caused by Silicone Sealing Compounds." Journal of the Surface Finishing Society of Japan 48, n. 8 (1997): 815–19. http://dx.doi.org/10.4139/sfj.48.815.

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32

Fitzpatrick, Brian J., Thomas F. McGee e Phyllis M. Harnack. "Self-sealing and self-releasing technique (SSSR) for the crystal growth of II–VI compounds". Journal of Crystal Growth 78, n. 2 (novembre 1986): 242–48. http://dx.doi.org/10.1016/0022-0248(86)90059-x.

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33

Andreeva, R., e D. Stoychev. "Phosphate sealing improvement of the corrosion resistance of thin cerium oxides coatings electroless deposited on aluminium". Journal of Physics: Conference Series 2240, n. 1 (1 marzo 2022): 012001. http://dx.doi.org/10.1088/1742-6596/2240/1/012001.

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Abstract The corrosion-protective ability was investigated of electroless deposited ceria conversion coatings on substrate(s) of technically pure aluminium. By applying different electrochemical methods, a comparative study of the investigated samples was conducted regarding the effect of pre-treatment of the Al substrate and the type of phosphate post-treatment on the change of: E OCP values, monitored EOCP vs. time plot; course of i a transients at the Epit of Al, i.e., ia vs. time plot; Rp vs. time of exposure of the samples in a corrosion medium and connected with this change in the CR of the systems studied. The juxtaposition of the obtained results showed the order of stabilities of the investigated systems towards the appearance and development of pitting corrosion. The presented results can be connected with and explain the data obtained earlier about the calculated stoichiometry of the elements in the so-formed compounds in the surface layers ascertaining that they are built of phosphate and oxide compounds of Ce3+, Ce4+ and Al3+, as well as with the influence of the concentrations of Cu and Fe around them.

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Kultys, Beata, e Karolina Waląg. "Application of headspace for research volatile organic compounds emitted from building materials". E3S Web of Conferences 28 (2018): 01019. http://dx.doi.org/10.1051/e3sconf/20182801019.

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Headspace technique and gas chromatography method with mas detector has been used for the determination of volatile organic compounds (VOC) emitted from various building and finishing materials, such as sealing foams, mounting strips, paints, varnishes, floor coverings. The tests were carried out for different temperatures (in the temperature range of 60 to 180 °C) and the time of heated vials with tested materials inside. These tests were conducted to verify the possibility of use this method of determination the VOC emission. Interpretation of chromatograms and mass spectra allowed to identify the type of compounds emitted from the tested materials and the optimum time and temperature for each type of material was determined. The increase in heating temperature of the samples resulted in increase the type and number of identified compounds: for four materials the increase was in the whole temperature range, for others it was from 90 °C. On the other hand, emission from mineral wool was low in whole temperature range. 30-minutes heating of the samples was sufficient to identify emitted compounds for most of tested materials. Applying a longer time, i.e. 24 hours, significantly increased the sensitivity of the method.

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Ivanovs, Semjons, e Eduards Matisans. "ECOLOGICALLY SAFE TECHNOLOGIES OF GRASS FEED PRODUCTION". Environment. Technology. Resources. Proceedings of the International Scientific and Practical Conference 1 (20 giugno 2001): 36. http://dx.doi.org/10.17770/etr2001vol1.1969.

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The aim of the research was to find out the possibilities for reducing the prime cost of environmentally safe technologies fo the preparation of herbaceous fodder by improving technical means. During the recent years, on major individual and co? operative farms there is being introduced a perspective roll technology of processing wilted green grass with subsequent sealing of rolls m a flexible film. The advantages of the green grass processing technology with subsequent sealing of rolls in a flexible film are: - environmental safety o f the technology (exclusion of pollution with silo saps, absence o f odour nuisance, absence o f compounds m the feed that are detrimental to animals and formed during the common siloing, its low acidity); - considerably lower dependence of forage processing on weather conditions, complete mechanisation of engineering processes; - the forage can be processed in small quantities, and for its storage no specialised containers are needed, which is a valuable feature for small farms; - increased nutritive value and good gustative qualities providing a possibility of essential raising the yields of milk and its quality (retention of all nutrients and vitamins), insignificant losses of nutrients during the harvesting and storage period (not more than 10-15%).

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Díaz-Maroto, M. Consuelo, Marina Alarcón, Lucía Loarce, Ignacio J. Díaz-Maroto e M. Soledad Pérez-Coello. "Headspace Solid-Phase Microextraction: A Useful and Quick Tool for the Traceability and Quality Assessment of Wine Cork Stoppers". Applied Sciences 13, n. 9 (27 aprile 2023): 5451. http://dx.doi.org/10.3390/app13095451.

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Natural cork remains a favored option for sealing high-quality wine bottles, despite its high cost for wineries. The cork industry faces the challenge of certifying the quality and traceability of these corks, with physical–chemical characterization being a valuable tool in establishing these parameters. While cork taint compounds must be absent or in low concentrations, the volatile fraction of cork contains numerous compounds that, even in small amounts, can impact the wine’s final aroma. Moreover, these volatile compounds are indicative of the geographical origin of the cork planks used to make the stoppers. In this work, a total of 68 volatile compounds (alkanes, terpenes, benzenic compounds, aldehydes, ketones, acids, esters, alcohols and furanic and pyranic compounds) from natural corks of different qualities and origins were identified, using a fast and sensitive technique: headspace solid-phase microextraction coupled to gas chromatography–mass spectrometry (HS-SPME-GC-MS). Based on these volatile compounds, it was possible to establish differences between corks of different origins, although no discernible differences were detected in the samples of differing visual qualities, as this is a subjective parameter largely dependent on the cork’s external appearance. These findings show that the analysis of the volatile composition of corks via HS-SPME-GC-MS can be used as a quick tool for tracking their traceability and selecting the most appropriate parameters at each stage of processing to minimize the increase in unwanted compounds.

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37

Murtagian, G. R., V. Fanelli, J. A. Villasante, D. H. Johnson e H. A. Ernst. "Sealability of Stationary Metal-to-Metal Seals". Journal of Tribology 126, n. 3 (28 giugno 2004): 591–96. http://dx.doi.org/10.1115/1.1715103.

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The effectiveness of stationary metal-to-metal seals is investigated with respect to contact pressure and length, load history, and the use of sealing compounds. Laboratory cup and cone tests were carried out, and experimental results were used to develop a sealability criterion. A sealability parameter is proposed and a critical value for it was obtained from experiments. The criterion was validated through full-scale tests of tubular connections and FEA. This criterion can be used for the comparison, qualification and future performance improvements of different metal-to-metal seals, in particular those used in the petroleum industry.

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AKITOU, Tetsu, Mari KOBAYASHI, Keisuke TAKAHASHI e Toshinori KIMURA. "REACTION PRDUCTS OF PORTLAND CEMENT-BASED SEALING COMPOUNDS HARDENDE AT DEEP SEAFLOOR AT A 1900m DEPTH". Cement Science and Concrete Technology 75, n. 1 (31 marzo 2022): 247–54. http://dx.doi.org/10.14250/cement.75.247.

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39

Weiss, Armin. "About sealing of waste disposals by clays with special consideration of organic compounds in percolating water". Applied Clay Science 4, n. 2 (giugno 1989): 193–209. http://dx.doi.org/10.1016/0169-1317(89)90008-2.

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Villar, Margarita, Iván Pacheco, Octavio Merino, Marinela Contreras, Lourdes Mateos-Hernández, Eduardo Prado, Dina Karen Barros-Picanço et al. "Tick and Host Derived Compounds Detected in the Cement Complex Substance". Biomolecules 10, n. 4 (5 aprile 2020): 555. http://dx.doi.org/10.3390/biom10040555.

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Ticks are obligate hematophagous arthropods and vectors of pathogens affecting human and animal health worldwide. Cement is a complex protein polymerization substance secreted by ticks with antimicrobial properties and a possible role in host attachment, sealing the feeding lesion, facilitating feeding and pathogen transmission, and protection from host immune and inflammatory responses. The biochemical properties of tick cement during feeding have not been fully characterized. In this study, we characterized the proteome of Rhipicephalus microplus salivary glands (sialome) and cement (cementome) together with their physicochemical properties at different adult female parasitic stages. The results showed the combination of tick and host derived proteins and other biomolecules such as α-Gal in cement composition, which varied during the feeding process. We propose that these compounds may synergize in cement formation, solidification and maintenance to facilitate attachment, feeding, interference with host immune response and detachment. These results advanced our knowledge of the complex tick cement composition and suggested that tick and host derived compounds modulate cement properties throughout tick feeding.

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Ivanochkin, Pavel G., Dmitriy S. Manturov, Sergey A. Danilchenko, Ksenija I. Karpenko e Tatiana A. Ivanochkina. "Study on the Effect of the Sealers on the Steel Surface Layer Modified by Electrical Discharge Machining". Solid State Phenomena 316 (aprile 2021): 713–19. http://dx.doi.org/10.4028/www.scientific.net/ssp.316.713.

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The paper describes the influence of the composition of the sealer used to form a composite coating on the surface of a steel sample by electrical discharge machining along the sealing layer on the structure and properties of the coating. The object of this study is samples made of steel 45. All samples are treated by electrical discharge machining with the use of ПР-В3К (Stellite) hard alloy-based anode and modifying sealers, based on CrCNi, TiCNi, and non-stoichiometric W and Mo compounds. Besides, the paper presents the physical and mechanical properties of the obtained coatings, examined during a set of tribological tests. The conducted experiment demonstrated that the wear resistance of coated samples is higher, compared to coatless ones. The strong point of our study lies in functionality to employ sealers, based on the SHS-reagents and non-stoichiometric W and Mo compounds with ESA processing in friction units.

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Mitwalli, Heba, Rashed Alsahafi, Abdulrahman A. Balhaddad, Michael D. Weir, Hockin H. K. Xu e Mary Anne S. Melo. "Emerging Contact-Killing Antibacterial Strategies for Developing Anti-Biofilm Dental Polymeric Restorative Materials". Bioengineering 7, n. 3 (30 luglio 2020): 83. http://dx.doi.org/10.3390/bioengineering7030083.

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Polymeric materials are the first choice for restoring tooth cavities, bonding tooth-colored fillings, sealing root canal systems, and many other dental restorative applications. However, polymeric materials are highly susceptible to bacterial attachment and colonization, leading to dental diseases. Many approaches have been investigated to minimize the formation of biofilms over polymeric restorative materials and at the tooth/material interfaces. Among them, contact-killing compounds have shown promising results to inhibit dental biofilms. Contact-killing compounds can be immobilized within the polymer structure, delivering a long-lasting effect with no leaching or release, thus providing advantages compared to release-based materials. This review discusses cutting-edge research on the development of contact-killing compounds in dental restorative materials to target oral pathogens. Contact-killing compounds in resin composite restorations, dental adhesives, root canal sealers, denture-based materials, and crown cements have all demonstrated promising antibacterial properties. Contact-killing restorative materials have been found to effectively inhibit the growth and activities of several oral pathogens related to dental caries, periodontal diseases, endodontic, and fungal infections. Further laboratory optimization and clinical trials using translational models are needed to confirm the clinical applicability of this new generation of contact-killing dental restorative materials.

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Putri, Gustiarini Rika, Irna Ekawati, Pharmayeni, Haswan e Erwinsyah Sipahutar. "PENANGANAN PRODUK DAN PACKAGING IKAN DENGAN PENDEKATAN GOOD MANUFACTURING PRACTICES". Journal of Science and Social Development 2, n. 2 (31 dicembre 2019): 70–74. http://dx.doi.org/10.55732/jossd.v2i2.182.

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Fumigation is a method of processing or preserving by utilizing a combination of drying treatment and the application of natural chemical compounds from the combustion of natural fuels, so that the aroma and taste that is characteristic of smoked fish products and the color becomes golden or brown. Processing conditions can be improved by using the Good Manufacturing Process (GMP), standardizing starting from raw materials, supporting materials, processes to final products and applying the principles of good sanitation and hygiene. One of the applications of GMP in fish processing is good packaging of product, namely vacuum packaging. Vacuum packaging is a packaging method that removes air from the packaging before sealing / press. This method can be used manually or automatically such as inserting the product into a plastic vacuum bag, removing air from the plastic and sealing the plastic. Pesisir Selatan Regency is an area with vast marine potential, large fishery potential. Although there are many producers of dried fish, product handling is still inadequate. For this reason, as one form of community service from the ATI Padang Polytechnic community, a counseling and training was held on the Handling of Fish Products and Packaging with a Good Manufacturing Practices Approach in the Ampang Pulai Koto XI Tarusan.

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Khan, Sohail H. "Recent Advances in Role of Propolis as Natural Additive in Poultry Nutrition". Journal of Apicultural Science 61, n. 2 (1 dicembre 2017): 167–83. http://dx.doi.org/10.1515/jas-2017-0020.

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AbstractPropolis is a natural resinous mixture produced by honey bees from substances collected from parts of plants, buds and exudates. Due to its waxy nature and mechanical properties, bees use propolis in the construction and repair of their hives for sealing openings and cracks and smoothing out the internal walls and as a protective barrier against external invaders and weathering threats. Bees gather propolis from different plants, in the temperate climate zone mainly from poplar. About 300 compounds such as polyphenols, phenolic aldehydes, sequiterpene quinines, coumarins, amino acids, steroids and inorganic compounds have been identified in propolis samples. Several scientific studies have been focused on the biological activities of propolis and its functions as a health supplement in humans. It could have akin function in poultry. This review is focused on the current findings relating to chemical composition, as an antioxidant, on performance, immunity, intestinal flora and haematological parameter in domesticated poultry species (broiler chickens, laying hens, quail and duck).

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45

Moskvichev, A. N., A. A. Moskvichev e Y. E. Razov. "The use of anaerobic sealing compounds to reduce vibrational wear in the components and mechanisms of equipment". Stankoinstrument, n. 4 (2018): 68–73. http://dx.doi.org/10.22184/24999407.2018.13.04.68.73.

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46

Kokatev, A. N., N. M. Iakovleva, K. V. Stepanova, N. Yu Ershova e K. V. Belov. "Monitoring of properties of epoxy molding compounds used in electronics for protection and hermetic sealing of microcircuits". IOP Conference Series: Materials Science and Engineering 665 (29 ottobre 2019): 012006. http://dx.doi.org/10.1088/1757-899x/665/1/012006.

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47

Ksit, Barbara, e Roman Pilch. "Liquid plastic films as a solution in terms of tightness problems and roofs aesthetics improvement – review". Budownictwo i Architektura 18, n. 4 (18 gennaio 2020): 051–58. http://dx.doi.org/10.35784/bud-arch.802.

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Liquid plastic films are understood as single- or two- or multi-component polymer or polymer bitumen mixtures. Liquid plastic films must meet the requirements for waterproofing insulation, which means, among others, that they must protect the roof from mechanical damage and have resistance to weather conditions. Suitability for use as waterproofing must be confirmed by an ETA (European Technical Assessment) certificate. The article presents the advantages and disadvantages of waterproofing coatings. The application and division of sealing compounds with a brief description of individual solutions are presented. It was also pointed out that the roof aesthetics would be improved due to the use of renovation solutions in the form of plastic films.

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Vodenicharov, Vasil, e Richard Pasteka. "Advancements in Adult and Neonatal Breathing Simulation Using the xPUL^TM Electro-mechanical Lung Simulator". Current Directions in Biomedical Engineering 9, n. 2 (1 dicembre 2023): 27–30. http://dx.doi.org/10.1515/cdbme-2023-1208.

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Abstract Simulation is essential for healthcare professionals, students, and researchers, providing a safe environment for skill development and improved patient care. This paper presents enhancements to the xPULMTMelectro-mechanical lung simulator, enabling simulation of adult and neonatal breathing patterns. Hardware improvements include interchangeable flow sensors and additional temperature, humidity, volatile organic compounds (VOCs), and pressure sensors. The software redesign separates control and processing elements, enhancing performance. Measured parameters demonstrate expanded capabilities, such as increased airflow range and higher sampling frequency. Airtightness measurements show improved chamber sealing. Future developments aim to simulate neonatal breathing patterns and optimise software for high-frequency measurements. The enhanced xPULMTM simulator provides a realistic platform for simulating lung mechanics, benefiting respiratory medicine research and education.

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Gruska, Radosław Michał, Alina Kunicka-Styczyńska, Andrzej Jaśkiewicz, Andrzej Baryga, Stanisław Brzeziński e Beata Świącik. "Fourier Transform Mid-Infrared Spectroscopy (FT-MIR) as a Method of Identifying Contaminants in Sugar Beet Production Process—Case Studies". Molecules 28, n. 14 (20 luglio 2023): 5559. http://dx.doi.org/10.3390/molecules28145559.

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Food safety has received considerable attention in recent years. Methods for rapid identification of a variety contaminants in both the final product and the manufacturing process are constantly developing. This study used Fourier Transform Mid-Infrared Spectroscopy (FT-MIR) spectroscopy to identify various contaminants endangering white sugar production. It was demonstrated that inorganic compounds (calcium carbonate—CaCO3), plastic contaminants (polypropylene), and oily contaminants (compressor sealing and lubrication lubricant) can be identified with a high degree of precision. FT-MIR spectroscopy was proved to be a useful technique for detecting sugar contaminants rapidly and precisely even without the application of a sophisticated spectra analysis. Commercial databases of reference spectra usage significantly simplify and facilitate the application of this method.

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Hornig, R. "Comparison of Various CSR Methods regarding the Static Long-term Sealing Behaviour of AEM, ACM and HNBR Compounds". International Polymer Science and Technology 37, n. 11 (novembre 2010): 1–15. http://dx.doi.org/10.1177/0307174x1003701101.

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