Wyniki wyszukiwania - BazTech

1

PVA/pectin/ZnO nanocomposites as antibacterial compounds for root canal treatment

Safaei Mohsen, Ahmadi Ramin, Salmani Mobarakeh Mohammad, Sharifi Roohollah, Ling Shing Wong, Rathi Shraddha, Amina, Afroz Shaista

Polimery

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2025

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Vol. 70, nr 5

331--339

EN

Structure and antibacterial activity of PVA/pectin/ZnO nanocomposites were investigated. The Taguchi method was used to select the optimal composition of the composites, considering the effect of PVA, pectin and ZnO on the biocidal properties. Various methods were used to characterize composites, including FT-IR, XRD, FESEM, EDS, TEM, elemental mapping, and TGA. The strong antibacterial properties of PVA/pectin/ZnO and complete inhibition of Enterococcus faecalis biofilm development were confirmed. The developed nanocomposites can be used in various fields as antimicrobial agents.

PL

Zbadano strukturę i aktywność przeciwbakteryjną nanokompozytów PVA/pektyna/ ZnO. Do wytypowania optymalnego składu kompozytów stosowano metodę Taguchi, uwzględniającą wpływ PVA, pektyny i ZnO na właściwości biobójcze. Do charakterystyki kompozytów stosowano różne metody, w tym FT-IR, XRD, FESEM, EDS, TEM, mapowanie pierwiastków i TGA. Potwierdzono silne właściwości przeciwbakteryjne PVA/pektyna/ZnO i całkowite zahamowanie rozwoju biofilmu Enterococcus faecalis. Opracowane nanokompozyty mogą być stosowane w różnych dziedzinach jako środki przeciwdrobnoustrojowe.

2

Valorization of citrus fruit processing waste in order to obtain a natural plant sorbent for the removal of heavy metals

Bejanidze Irina, Davitadze Nazi, Tavdgiridze Vakhtang, Didmanidze Nato, Nakashidze Nunu, Jakeli Eteri

Ecological Engineering & Environmental Technology

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2025

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Vol. 26, iss. 4

34--49

EN

The efficiency of technology is determined by the amount of waste. The purpose of this work - valorization of citrus fruit processing waste in order to obtain a natural plant sorbent for the removal of heavy metals; is the processing of waste - citrus peels, after squeezing the juices from them, to obtain effective sorbents for the removal of heavy metals. At the same time, ecological problems are solved - the ecological situation in the country is improved (utilization of waste and heavy metals) and the economic one - the company receives a high profit without any significant additional costs for the production of the sorbent. In addition to its practical significance, the project has scientific significance: for the first time, a technological scheme has been developed for the production of pectin and Na+-pectate sorbents in liquid and solid form from citrus processing waste: lemon, tangerine, orange and pomelo; For the first time, pectin isolates were concentrated using the baromembrane method of membrane technology - ultrafiltration, and this reduced the consumption of pectin precipitant by 12 times; was identified for the first time by high-performance liquid chromatography composition of pectin and sorbent obtained on its basis. The laws of sorption of divalent metal ions by pectin polysaccharides: their complexing ability with heavy metals from 0.02 M CuSO4 · 5H2O, NiCl2 · 6H2O, CoCl2 · 6H2O, Pb (CH3COO) 2 · 3H2O methods were studied by potentiometry and conductometry. To determine the kinetics of heavy metal sorption by the obtained liquid sorbent, the resulting mixture was left for 1, 2, 4, 6, 8, 12 and 24 hours. The structure of the sorbent is confirmed by IR spectra It was established that ion exchange plays an important role in the process of complex formation. Also found: similarity of sorption isotherms of copper and lead ions, influence of metal nature on sorption capacity of corresponding pectin polysaccharides; sorption activity of pectin polysaccharides in relation to lead ions higher than that of copper; The possibility of applying the linear equation of Langmuir in the wide range of concentrations of the external solution, for the estimation of the maximum capacity of the sorbent.

3

Optimization and Characterization Pectin Extraction from Rosy-Pulped Pomelo Using Ethanol Precipitation Method

Huong Ta Thi, Trang Tran Y. Doan

Ecological Engineering & Environmental Technology

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2024

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Vol. 25, iss. 8

308--315

EN

The goal of this study is to use a simple approach to synthesize pectin from grapefruit peel, an agricultural waste common in tropical regions. Additionally, the study employed optimization techniques to identify the ideal conditions for the maximum extraction efficiency while also determining the importance of studying factors. Besides, extracted pectin characteristics are also presented in this research. Under several analysis, some chemical groups for pectin were presented in extracted pectin by Fourier transform infrared spectroscopy analysis (FTIR). For instance, C-H methyl groups at the peak 1442 cm-1; methyl ester groups C=O appears at the wavelength 1747 cm-1 and aliphatic C-H groups and hydroxyl groups. Furthermore, under three major conditions acid (%); temperature and time extraction, an optimization study was conducted to figure out the optimal conditions for pectin extraction efficiency. Under optimal conditions acid 10%; 77.5 °C and 80 mins is the favorable condition for obtaining pectin extraction efficiency. Basically, this study is the first one extracting pectin from rosy-pulp pomelo peel by sulfuric acid-ethanol precipitation method. This is a preliminary that lays the foundation for purifying extracted pectin from rosy-pulp pomelo, also solving this agricultural waste bring higher economic values.

4

Modification of the Process of Obtaining Pectin by the Methods of Membrane Technology

Davitadze Nazi

Journal of Ecological Engineering

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2023

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Vol. 24, nr 11

117--126

EN

The proposed approach to the processing of plant materials using membrane methods is new in the field of developing new methods for isolating pectin substances and obtaining not only pectin itself, but also new low-cost high-quality pectin-containing products. The studies were carried out on pressings obtained after squeezing juice from citrus fruits (Georgia): lemon (“Meer”), Washington-Navel orange variety, “Unshiu” mandarin and the largest citrus pomelo fruit (China). From the fruits harvested in April-December, the juice was squeezed out and from the remaining mass, which was crushed, by adding HCl (1:10) pectin isolates were obtained, which were concentrated by ultrafiltration. Soluble pectin was precipitated from the concentrated extract with ethyl alcohol, i.e. converted to an insoluble form. The resulting precipitate was thoroughly washed with alcohol and then dried at T = 55°C. The concentration of isolates was carried out by tangential filtration in dynamic mode on a UPL-06 unit, an AR-0.2 ultrafiltration separating apparatus was used as a membrane, which was located vertically in the unit and was a ready-made module with a filtration area of 2 m2; obtained on the basis of polyamide and phenylone – C 2-B hollow fibers VPU-15PA with a pore size of 500 A. Ultrafiltration was carried out in circulation mode to the maximum possible concentration of the extract. The dependence of the productivity of the process of purification-concentration of pectin extracts from citrus fruit waste without their morphological division, pressure, duration and filtration mode, type and term of fruit harvesting was studied. The work performed has shown that the use of semi-permeable membranes for concentrating pectin extracts allows: to a large extent to remove carbohydrates from the extract, to achieve partial discoloration of the pectin extract; ensure 100% retention of pectin substances by membranes; to achieve a high degree of concentration of the extract and made it possible to obtain a pectin preparation with a purity of 95%. The proposed technology using membrane technology makes it possible to obtain pectin with a purity of 95% or more by purifying it from ballast impurities at the stage of extract concentration.

5

Development of Technology for the Extraction of Natural Pectin from Juice Production Waste

Davitadze Nazi, Bejanidze Irina, Tsintsadze Maya

Ecological Engineering & Environmental Technology

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2023

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Vol. 24, iss. 5

117--130

EN

In the article, the questions of pectin extraction from citrus fruits are discussed. The research was carried out on the extracts obtained after squeezing the juice from citrus fruits: lemon (Georgian and Meer), Washington-Navel orange (Georgia and Turkey), Unshiu mandarin and the largest citrus fruit pomelo (China). Fruits collected in April-December were morphologically divided into flavedo, albedo, and tissue of fruit lobes, from which pectin isolates were obtained. The dependence of the production of isolates on the ratio of components of the hydromodule (acid: water), the type of acid (HCl, HNO3, H2SO4, H2C2O4 and C6 H8 O7), the duration of the process (1, 2, 3, 4, 5 and 24 hours) and the extraction temperature (20°) was investigated., 60°, 80°С), the type and time of fruit ripening, as well as the type of precipitation reagent pectin (AlCl3, CaCl2, 95% C2H5OH, isopropanol) and its concentration, duration of extraction (2h, 8h, 12h, 24h) and temperature (20, 40, 60, 70, 80°С). A technological scheme for obtaining pectin extracts was developed. Established: extraction of pectin depends on the type and time of fruit collection, temperature and duration of extraction, type of extractant; the ratio of water and acid in the hydromodule (Н2О : acid) should be 1:10; isolate should be extracted with HCl, H2SO4 or lemon acid; рН of the hydromodule of the isolate should be 1.8–2.0; Extraction of pectin should be carried out with 95% C2H5OH, during 24 hours, with a module of 1:3 at room temperature. Identification of pectin isolates and obtained samples was carried out by the method of high-efficiency liquid chromatography. Obtained: practically all samples contain pectin and galacturonic acid and do not contain polygalacturonic acid, which indicates the complete extraction of pectin.

6

Sodium alginate and pectin estimation in raft forming pharmaceuticals by high performance liquid chromatography method

Hanif Muhammad, Shah Shahid, Rasool Nasir, Abbas Ghulam, Saadullah Malik, Khan Sajid Mehmood, Ahmed Muhammad Masood, Abbas Nazar, Ashfaq Mehran, Iqbal Omeira

Acta Chromatographica

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2021

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Vol. 33, no. 2

127--133

EN

The high performance liquid chromatographic (HPLC) method was developed for the combined estimation of sodium alginate and pectin in raft forming pharmaceuticals on C18 column ZORBAX ODS (1.5 cm × 4.6 mm, 5 μm) with UV detection at 378 nm. The assay condition comprised of phosphate buffer pH 7.4 and methanol 60:40% v/v at a flow rate of 1.25 mL/min. The separation of sodium alginate and pectin with good resolution and a retention time less than 8 min was attained. The method was linear over a range of 200–800 μg/mL of sodium alginate and pectin. The regression values obtained from linearity curve of sodium alginate and pectin were 0.9993 and 0.9991, respectively. The retention time of sodium alginate and pectin was 3.931 and 7.470 min, respectively. The percent recovery of sodium alginate and pectin ranged from 94.2–98.5% and 92.1–98.4% respectively. The limit of detection (LOD) and limit of quantification (LOQ) of sodium alginate were found to be 2.443 and 3.129 μg/mL and the LOD and LOQ of pectin were 3.126 and 3.785 μg/mL, respectively. The resolution of sodium alginate and pectin was found in the range of 1.03–1.89 and 1.10–1.91, respectively. This method has been successfully applied to analyze the concentrations of sodium alginate and pectin in raft forming drug delivery systems.

7

Plant-derived rhamnogalacturonan-I’s modulate proinflammatory cytokine gene expression in neutrophils stimulated by E. coli LPS and P. gingivalis bacteria

Folkert J., Mieszkowska A., Burke B., Addison O., Gurzawska K.

Engineering of Biomaterials

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2018

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Vol. 21, no. 144

2--7

EN

Titanium dental implants often induce the foreign body immune response. The duration of the inflammatory process determines the initial stability and biocompatibility of the implant. The challenge for bone tissue engineering is to develop implant biocompatible and bioactive surface coatings that regulate the inflammatory response and enhance osseointegration. Pectins, plant-derived polysaccharides, have been shown to be potential candidates for surface coating due to their possible roles in improving osseointegration and bone healing. The aim of this study was to evaluate in vitro the effect of plant-derived pectin rhamnogalacturonan-I (RG-I) nanocoating on pro- and anti-inflammatory human polymorphonuclear leucocytes (PMN) responses to E. coli LPS or P. gingivalis bacteria. In this study unmodified RG-I and structurally modified RG-I from potato were examined. All in vitro studies were performed on tissue culture polystyrene surfaces (TCPS) or titanium (Ti) discs coated with unmodified and modified RG-Is. Changes in PMN gene expression occurred on both surfaces. The presence of RG-Is down-regulated proinflammatory genes, IL1B, IL8, TNFA. Our results clearly showed that pectin RG-I nanocoating decreased the level of proinflammatory genes expression in stimulated PMN and may therefore be considered as a potential candidate for modulation of the inflammatory response elicited by insertion of implants into living tissue.

8

Fabrication and physicochemical properties of pectin/chitosan scaffolds

Kulikouskaya V., Lazouskaya M., Agabekov V.

Engineering of Biomaterials

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2018

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Vol. 21, no. 146

2--7

EN

Scaffolds from chitosan and its combinations with other polymers are widely used for tissue engineering application. This is due to the favourable biological properties of chitosan such as antimicrobial activity, biocompatibility, biodegradability, cell adhesion and proliferation, etc. The aim of the study was the creation of 3D porous scaffolds based on pectin/chitosan polyelectrolyte complexes and study the influence of components ratio on their physico-chemical properties, as well as degradation behaviour in solutions modelling the media of the human body. Porous “sponge-like” polysaccharide films were produced using freeze-drying technique from gel-like pectin-chitosan polyelectrolyte complexes. The weight ratio of chitosan:pectin in complexes was varied in the range from 1:1 to 1:2. Obtained samples were characterized by infrared spectroscopy and scanning electron microscopy. It has been shown that pectin-chitosan films turned out to have sponge-like structure with highly interconnected pores with the size about 50-300 μm. It has been determined that all samples regardless of the chitosan:pectin ratio possess high swelling properties. The degradation profile of scaffolds in different media was studied. It has been determined that the largest weight loss is observed in water and reaches more than 80% after 1 day, while in NaCl and PBS solutions weight loss is approximately 50-60% after 25 days. For samples with different chitosan:pectin weight ratio, weight loss slightly rise with increasing amount of pectin. It has been shown that mesenchymal stem cells adhered to the surface of obtained pectin:chitosan porous scaffolds in viable state. Hence, it can be served as a potential material for tissue engineering applications.

9

Właściwości fizyczne żeli pektynowych zawierających glinkę kaolinową

Muszyński S., Kwaśniewska A., Sołowiej B., Tomczyk A., Leus A., Szymanek M., Siedliska K., Gładyszewska B.

Przemysł Chemiczny

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2017

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T. 96, nr 2

422--426

PL

Zaprezentowano wyniki eksperymentalnych badań cech fizycznych żeli otrzymanych z mieszanki pektyny z nanododatkiem w postaci gliny kaolinowej. Badania przeprowadzono dla 6 różnych kombinacji, wyznaczając podstawowe parametry fizyczne (gęstość, aktywność wody, barwa, zwilżalność) termiczne (analiza DSC) oraz reologiczne (profilowa analiza tekstury TPA). Stwierdzono istotny wpływ zarówno zawartości pektyny, jak i dodatku kaolinu. Wykonana analiza korelacji wykazała istnienie związku pomiędzy zmierzonymi parametrami fizycznymi a wyznaczonymi cechami TPA.

EN

Low-ester pectin was mixed with various amts. of kaolin clay to obtain hydrous gels. The addn. of clay resulted in an alteration of phys. parameters of gels, esp. d. and colour. Performed texture profile anal. revealed an increase of hardness, adhesiveness and flexibility of the kaolin-enriched gels.

10

Natural Fibres From the Bark of Mulberry Branches for Textile Application

Dong Z., Ding Z., Zhang S., Zhang Y., Fan H., Yang Y.

Fibres & Textiles in Eastern Europe

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2017

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Vol. 25, no. 3 (123)

20--25

EN

Fibers with low gum content were extracted from the bark of mulberry branches by a combination of bacteria and peroxide treatments. The bark of mulberry branches, with 30% cellulose, is a copious and inexpensive source of natural fibers. However, fibers extracted by microwave, enzyme or alkali had a high gum content (15.5% for hemicellulose and 8.6% for lignin), which rendered them difficult to be made into high- value textiles. In this research, strains with high polygalacturonase activities and subsequent hydrogen peroxide decreased the hemicellulose content to 2.5% and lignin content to 2.4%. Mulberry fibers in our study could be spun into yarns with a fineness of 18.2 tex. Compared to flax yarns, mulberry fiber yarns had a tenacity 20% higher, an elongation 18% higher and an unevenness 30% lower. Cotton/mulberry fiber fabrics had softer and smoother hand than cotton/flax fabrics. Overall, the fibers in our study show better potential for industrial textile applications than those in previous studies.

PL

Kora gałęzi morwy jest bogatym i niedrogim źródłem włókien naturalnych. W pracy przedstawiono proces otrzymywania włókien z kory morwy z wykorzystaniem szczepów bakteryjnych oraz nadtlenku wodoru, co zmniejszyło zawartość hemicelulozy do 2,5% i zawartości ligniny do 2,4%. W porównaniu do przędz lnianych, przędze z włókien morwy wykazywały o 20% wyższą wytrzymałość, o 18% wyższe wydłużenie i o 30% niższą nierównomierność. Tkaniny bawełniane z dodatkiem morwy miały bardziej miękki i gładszy chwyt, niż tkaniny bawełniane z dodatkiem lnu. Stwierdzono, że metoda pozyskiwania włókien z kory morwy przy zastosowaniu bakterii i nadtlenku wodoru może być stosowana do wyodrębniania włókien morwowych w celu produkcji wyrobów o wysokiej wartości i szerokim spektrum możliwości zastosowań przemysłowych.

11

Starch bioplastic film as an alternative food-packaging material

Jeyasubramanian K., Balachander R.

Journal of Achievements in Materials and Manufacturing Engineering

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2016

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Vol. 75, nr 2

78--84

EN

Purpose: To synthesize bioplastics on a small scale from starch available in potato and to study the characteristics of the same when pectin is blended with it. Design/methodology/approach: The bioplastics are fabricated manually using starch extracted from potato and glycerol. Pectin was blended to this combination to synthesize another set of bioplastic films. The characterization of the obtained films were done by FTIR spectroscopy, SEM analysis, water solubility test, water absorption test and biodegradability test. Findings: The synthesized films were found to be physically similar to the commercially available films. However on further study, it was found that the former could not provide adequate strength as compared to the latter though the former could still be used for light duty purposes. The advantage of the former over the latter was that it was found to be degradable. Research limitations/implications: Environment-friendly manufacture of the films on a large scale is yet to be studied upon. Economic and eco-friendly methods to improve the tensile strength of the bioplastics to bring it at par with the commercial plastic films are to be found out. Practical implications: The starch and starch-pectin blend films were found to be water soluble. However, they were also found to absorb water which could be implied as a disadvantage. The main objective of biodegradability was achieved. Originality/value: Though researches are going on in the field of biodegradable films, the addition of pectin to starch to improve the characteristics of degradable films is an area where more research has to be done. This paper inculcates the study of adding pectin to starch and the resulting changes in the characteristics of the starch film.

12

Ispolzovanie klukvy krupnoplodnoj (Oxycoccus Marcocarpus ait. per.) v piscevoj promyslennosti

Reszetnikov V. N., Kuhareva L. V., Alekseeva E. I., Ruban N. N., Spiridovic E. V.

Inżynieria i Aparatura Chemiczna

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2006

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Nr 1-2

68-69

13

Krioochronne właściwości pektyny i lecytyny w tkance mięśniowej drobiu w czasie zamrażalniczego przechowywania

Stodolnik L., Rosiński P., Grzegrzółka A.

Chłodnictwo : organ Naczelnej Organizacji Technicznej

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2004

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R. 39, nr 8

74-77

PL

Celem badań było określenie wpływu dodatku pektyny i lecytyny w stężeniu 0,25, 0,50 i 0,75% do zmielonej tkanki mięśniowej drobiu na zwiększenie zdolności wiązania soków komórkowych i zmiany konsystencji mięsa w czasie przechowywania w temperaturze -18°C. Określano wyciek cieplny, wyciek wymuszony i twardość tkanki mięśniowej. Zastosowanie pektyny do mięsa drobiowego już w stężeniu 0,25% istotnie zmniejszało wyciek cieplny i wymuszony. Zwiększenie zawartości pektyny do 0,50 i 0,75% podnosiło zdolność utrzymywania soków komórkowych bardziej niż 0,25%, ale nie proporcjonalnie do stężenia. Twardość mięsa zawierającego pektynę była większa niż farszu bez jej dodatku i zwiększała się po zamrażalniczym przechowywaniu, ale nie była ona proporcjonalna do stężenia dodatku. Dodatek lecytyny do mięsa ograniczał wyciek cieplny i wymuszony, ale w mniejszym stopniu niż pektyna, zastosowane w takich samych stężeniach. Lecytyna, w każdym analizowanym stężeniu, nie zmieniała twardości mięsa w czasie zamrażalniczego przechowywania w porównaniu z mięsem bez dodatków krioochronnych.

EN

The aim of this study was to determine the effect of pectin and lecithin addition in 0.25, 0.50 and 0.75% concentration to minced chicken meat tissue on increasing of water holding capacity and consistence changes of meat during storage at - 18°C. The analysis included: thermal and forced exudes as well as hardness of meat tissue. Addition of pectin to chicken meat in 0.25% concentration decreased essentially both thermal and forced exudes. Increase in pectin content up to 0.50 and 0.75% shifted up water holding capacity however not proportionally to cryoprotectants concentration. Hardness of meat with pectin added was greater than of mince without such addition and grew up after frozen storage, however was not proportional to the additive concentration. Addition of lecithin limited thermal and forced exudes to a lesser extend than pectin used in the same concentrations. Lecithin in all tested concentrations did not cause change in hardness of the meat during frozen storage in comparison with meat without cryoprotectants.