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Tytuł:
Colloidal Metal Surfaces as Biosensors of Biological Samples
Autorzy:
Tąta, A.
Gralec, B.
Proniewicz, E.
Powiązania:
https://bibliotekanauki.pl/articles/106973.pdf
Data publikacji:
2017
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
Tematy:
colloidal gold nanoparticles, AuNPs
colloidal silver nanoparticles, AgNPs
colloidal platinum nanoparticles, PtNPs
surface-enhanced Raman Scattering, SERS
bombesin, BN
Opis:
Colloidal solutions of silver (AgNPs), gold (AuNPs), and platinum nanoparticles (PtNps) obtained under controlled conditions in an aqueous media by chemical methods were used as effective biosensors of biological compounds such as bombesins (BN). The BN adsorption at the metal/aqueous interface was investigated by surface-enhanced Raman scattering (SERS). Briefly, the spectral pattern of BN in the silver, gold, and platinum sols is strongly influenced by the indole ring vibrations of L-tryptophan at position 8 of the amino acid sequence (Trp8). In addition, L-methionine (Met) at the C-terminus determines the BN adsorption, mainly onto the AuNPs and AgNPs surfaces.
Źródło:
Journal of Casting & Materials Engineering; 2017, 1, 1; 7-10
2543-9901
Pojawia się w:
Journal of Casting & Materials Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Silver nanoparticles – possible applications and threats
Autorzy:
Kędzierska, Marta
Miłowska, Katarzyna
Powiązania:
https://bibliotekanauki.pl/articles/1830658.pdf
Data publikacji:
2021-09-29
Wydawca:
Uniwersytet Łódzki. Wydawnictwo Uniwersytetu Łódzkiego
Tematy:
nanoparticles
nanosilver
colloidal silver
nanomedicine
nanomaterials
Opis:
Silver is known for its biocidal properties. This metal has been used for decorations and food preservation since ancient times and has also been used in medicine. Silver foil has been used to cover wounds and burns. In addition, silver solutions were created to help fight the microorganisms responsible for causing infections, which helped the wound healing process. Currently, to increase and optimize the properties of silver, it is used on a nanometric scale. Nanosilver, due to its expanded spectrum of properties, is used in many economic sectors, including in the production of disinfectants and food films, as well as in animal farms. Nanoparticles are also the basis of nanomedicine action. Creating new drug complexes with nanosilver and modifying the medical materials used in implantology or dentistry allow the lives of many people to be saved every day. In addition, nanosilver particles are commonly used as a specific disinfectant in the production of hospital materials: dressings, bandages, surgical masks, hospital clothing and shoes, and equipment. With the growing use of nanosilver, there are concerns about its harmful effects on living organisms, because not all its mechanisms of action are known. As is well known, the dose determines the toxicity of a given substance; the case is similar for nanosilver. However, is the dose providing antibacterial and antifungal properties non-toxic to animals and humans? This review presents a summary of the scientific research showing the scope of nanosilver activity and the resulting threats.
Źródło:
Acta Universitatis Lodziensis. Folia Biologica et Oecologica; 2021, 17; 14-31
1730-2366
2083-8484
Pojawia się w:
Acta Universitatis Lodziensis. Folia Biologica et Oecologica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Colloidal crystal cladded microfiber for refractive index sensing
Autorzy:
Yan, H. T.
Zhao, X Y
Zhang, Ch.
Zhen, Z Q
Li, Q Z
Cao, J X
Xia, L X
Powiązania:
https://bibliotekanauki.pl/articles/174902.pdf
Data publikacji:
2014
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
microfibers
colloidal crystals
refractive index sensing
Opis:
We investigate the evanescent field of a microfiber wrapped by colloidal crystals. The microfiber has the diameter of about 1 μm that is drawn from a single-mode fiber with an alcohol lamp. The colloidal spheres are further attached to the microfiber through thermal evaporation, then they self-assemble to crystal-like structures. The 400 nm, 590 nm, and 710 nm-diameter SiO2 colloidal spheres are used, respectively. The spectral responses are studied theoretically and experimentally, and the results agree with each other. It is revealed that the evanescent field of a microfiber could be modulated by the photonic band-gap of colloidal crystals. This characteristic is very useful in refractive index sensing for liquids.
Źródło:
Optica Applicata; 2014, 44, 2; 309-315
0078-5466
1899-7015
Pojawia się w:
Optica Applicata
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Electrospinning of Antimony Doped Tin Oxide Nanoparticle Dispersion for Transparent and Conductive Films
Autorzy:
Cho, Young-Sang
Han, Minho
Woo, Seung Hee
Powiązania:
https://bibliotekanauki.pl/articles/356048.pdf
Data publikacji:
2020
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
ATO nanoparticles
colloidal dispersion
electrospinning
transparent films
conductive film
Opis:
Stable dispersion of antimony-doped tin oxide nano-powder was prepared by wet attrition process by comminuting aggregated ATO nano-powder using the titanate coupling agent as a dispersant to form the chemisorbed layer on the particle surface. The feed solution of the ATO dispersion and PVP was prepared for electro-spun fibers on the glass substrate. The surface resistance of the fibrous ATO film after electrospinning for 30 minutes was in the order of 105 Ω/□, which is sufficient for anti-static coating. The optical transmittance of ATO fibers was confirmed by measuring the visible light transmittance.
Źródło:
Archives of Metallurgy and Materials; 2020, 65, 4; 1345-1350
1733-3490
Pojawia się w:
Archives of Metallurgy and Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Colloidal Silver Nanoparticles Enhance Bulb Yield and Alleviate the Adverse Effect of Saline Stress on Lily Plants
Autorzy:
Byczyńska, Andżelika
Zawadzińska, Agnieszka
Salachna, Piotr
Powiązania:
https://bibliotekanauki.pl/articles/24202903.pdf
Data publikacji:
2023
Wydawca:
Polskie Towarzystwo Inżynierii Ekologicznej
Tematy:
nanomaterials
environmental stress
soil salinity
plant growth
colloidal silver
Opis:
Salinity occurring in intensively used agricultural, industrialized, and urbanized areas is one of the main factors in soil degradation. The effect of silver nanoparticles (AgNPs) on plant growth under environmental stresses is still not fully understood. Two experiments were conducted on the response of Asiatic lilies to treatment with colloidal AgNPs. In Experiment I, the study aimed to evaluate the effect of treating 'Osasco' lily bulbs with colloidal AgNPs (0, 25, 50, 100, and 150 ppm) on growth, flowering, and bulb yield, as well as the production of bulblets. Compared with the control, the applied colloidal AgNPs at all concentrations caused an acceleration of flowering and an increase in bulb diameter and the fresh weight of the aboveground part of the plants and bulbs. In addition, treatment with colloidal AgNPs at concentrations of 100 and 150 ppm increased bulblets’ number and fresh weight. In Experiment II, the effects of colloidal AgNPs (100 ppm) and NaCl stress (600 mM) on the growth parameters, assimilation pigment content, and chemical composition of 'Bright Pixi' lily leaves were evaluated. As a result of the application of colloidal AgNPs, plants flowered faster and had increased height, petal width, fresh bulb weight, bulb diameter, and several scales in the bulb. Under NaCl stress, plants had reduced fresh weight of the aboveground part and bulb, bulb diameter, number of scales in a bulb, and contents of assimilation pigments, N, K, Ca, Cu, Mn and Zn. Colloidal AgNPs offset the adverse effects of salinity on bulb yield by increasing fresh bulb, bulb diameter, and the number of scales in lily bulbs. In conclusion, using colloidal AgNPs can contribute to developing new methods of bulbous plants production and an effective strategy to protect plants from ever-increasing land salinization.
Źródło:
Journal of Ecological Engineering; 2023, 24, 6; 338--347
2299-8993
Pojawia się w:
Journal of Ecological Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Dispersion of colloidal agglomerate in mesoscale modelled by a hybrid fluid particle model elastic properties of the rectangular crystalline phase of planar hard cyclic pentamers
Autorzy:
Dzwinel, W.
Yuen, D. A.
Powiązania:
https://bibliotekanauki.pl/articles/1965869.pdf
Data publikacji:
2001
Wydawca:
Politechnika Gdańska
Tematy:
fluid particle model
mesoscopic flow
colloidal agglomerate
fragmentation
agglomeration
Opis:
The dispersion of the agglomerating fluid process involving colloids has been investigated at the mesoscale level by a discrete particle approach - the hybrid fluid particle model (FPM). Dynamical processes occurring in the granulation of colloidal agglomerate in solvents are severely influenced by coupling between the dispersed microstructures and the global flow. On the mesoscale this coupling is further exacerbated by thermal fluctuations, particle-particle interactions between colloidal beds and hydrodynamic interactions between colloidal beds and the solvent. Using the method of FPM, we have tackled the problem of dispersion of a colloidal slab being accelerated in a long box filled with a fluid. Our results show that the average size of the agglomerated fragments decrease with increasing shearing rate gamma, according to the power-law A*gamma k, where k is around 2. For larger values of gamma, the mean size of the agglomerate S_avg increases slowly with gamma from the collisions between the aggregates and the longitudinal stretching induced by the flow. The proportionality constant A increases exponentially with the scaling factor of the attractive forces acting between the colloidal particles. The value of A shows a rather weak dependence on the solvent viscosity. However, A increases proportionally with the scaling factor of the colloid-solvent dissipative interactions. These results may be applied to enhance our understanding concerning the nonlinear complex interaction occurring in mesoscopic flows such as blood flow in small vessels.
Źródło:
TASK Quarterly. Scientific Bulletin of Academic Computer Centre in Gdansk; 2001, 5, 3; 355-371
1428-6394
Pojawia się w:
TASK Quarterly. Scientific Bulletin of Academic Computer Centre in Gdansk
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A simplified analysis of the effect of nano-asperities on particle-bubble interactions
Autorzy:
Drelich, J. W.
Powiązania:
https://bibliotekanauki.pl/articles/109482.pdf
Data publikacji:
2018
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
colloidal interactions
flotation
energy barrier
DLVO model
roughness effect
Opis:
The interactions of gas bubbles with particles having rough and heterogeneous surfaces are much more complex than the commonly used DLVO – based models predict. The effects of surface roughness on flotation and particle – bubble interactions have been reported many times in the past, although a clear understanding of their origins has been lacking. To explain differences in interactions for spherical hydrophobic particles, a theoretical analysis of the interaction potential was carried out for a model rough particle interacting with a bubble surface in an electrolyte solution in this study. The attractive hydrophobic interaction potential was added to repulsive retarded van der Waals and repulsive electrical double layer interaction potentials. The rough microscopic particles were modeled as spheres decorated with nano-sized asperities. Parameters that reflect common flotation separation systems were selected for testing this theoretical model and computation of the energy barrier applicable to particle – flat bubble surface interactions. It was found that hydrophobic asperities with a height of only several nanometers can reduce the repulsive interaction energy by an order of magnitude. Theoretical analysis also reveals that surface coverage of microscopic particles by nano-sized asperities is important as well.
Źródło:
Physicochemical Problems of Mineral Processing; 2018, 54, 1; 10-18
1643-1049
2084-4735
Pojawia się w:
Physicochemical Problems of Mineral Processing
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Improvement of Microstructure and Barrier Properties of Silicate Coatings on Low Carbon Steel by Incorporating Colloidal Nano-SiO2
Autorzy:
Majdi, M. R.
Danaee, I.
Zaarei, D.
Farzam, M.
Powiązania:
https://bibliotekanauki.pl/articles/355960.pdf
Data publikacji:
2020
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
colloidal nano-SiO2
silicate coating
corrosion
AFM
ATR-FTIR
Opis:
Silicate coatings have been considered as an alternative to toxic and carcinogenic other chemical treatments. In this paper, a strengthened silicate coating was formed on the surface of low carbon steel by dip immersion method. The modification and strengthening was done by loading colloidal nano-SiO2 into the film. The characterizations of nano-SiO2 were investigated by FESEM, TEM and FT-IR. The effects of nano contents (weight ratio) and drying temperatures on corrosion properties of silicate film were studied. Potentiodynamic polarization, electrochemical impedance spectroscopy and immersion tests have been used to study corrosion behavior of nano-loaded silicate films. Surface morphology, microstructure and its chemical composition were analyzed by means of FESEM, EDS, AFM, XRD, GIXRD, ATR-FTIR and Raman techniques. Results indicated that colloidal nano-SiO2 properly modified the silicate coatings and significantly improved the corrosion resistance and barrier property. Also drying temperature showed a considerable effect in silicate coating and higher corrosion resistance was obtained with 150°C curing.
Źródło:
Archives of Metallurgy and Materials; 2020, 65, 2; 627-638
1733-3490
Pojawia się w:
Archives of Metallurgy and Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Synteza i właściwości adsorpcyjne koloidalnie odwzorowanych nanoporowatych węgli otrzymanych z kopolimeru chlorku winylidenu i chlorku winylu (Saranu)
Synthesis and adsorption properties of colloid-templated nanoporous carbons obtained using vinylidene and vinyl chloride copolymer (Saran)
Autorzy:
Choma, J.
Jaroniec, M.
Zawiślak, A.
Górka, J.
Powiązania:
https://bibliotekanauki.pl/articles/236510.pdf
Data publikacji:
2009
Wydawca:
Polskie Zrzeszenie Inżynierów i Techników Sanitarnych
Tematy:
adsorpcja
synteza
krzemionka koloidalna
Saran
kopolimer
adsorption
synthesis
colloidal silica
copolymer
Opis:
W pracy zaproponowano prostą syntezę mikro- i mikro-mezoporowatego węgla z wykorzystaniem koloidalnej krzemionki o wymiarach ok. 24 nm i kopolimeru chlorku winylidenu i chlorku winylu (Saranu) jako prekursora węglowego. W celach porównawczych z samego kopolimeru, bez dodatku koloidalnej krzemionki, otrzymano całkowicie mikroporowaty materiał węglowy. Otrzymany z udziałem krzemionki koloidalnej węgiel mikro-mezoporowaty miał powierzchnią właściwą ok. 850 m2/g, natomiast węgiel mikroporowaty - ok. 1000 m2/g. Udział objętości mikro- i mezoporów stanowił po 50% całkowitej objętości porów węgla mikro-mezoporowatego, matomiast w wypadku węgla mikroporowatego udział mikroporów stanowił blisko 100% całkowitej objętości porów. O ile wymiar mikroporów w obu węglach wynosił ok. 1 nm, o tyle duże, jednorodne, sferyczne mezopory w węglu mikro-mezoporowatym miały wymiar ok. 25 nm, zgodny z wymiarem krzemionki koloidalnej użytej w procesie syntezy tego materiału. Pomiary adsorpcji azotu wykazały, że mezopory były połączone ze sobą i w związku z tym dostępne w procesie adsorpcji tego gazu. Ponadto wykazano, że dobrze rozwinięta mikroporowatość węgla powstała podczas procesu karbonizacji w wyniku termicznego rozkładu kopolimeru (Saranu). Wydaje się, że zaproponowaną metodę można wykorzystać do produkcji mikro-mezoporowatych węgli na skalę techniczną.
A simple strategy is proposed for the synthesis of microporous and micro-mesoporous carbons by using colloidal silica (approx. 24 nm in diameter; hard template) and the vinylidene and vinyl chloride copolymer (Saran) as a carbon precursor. For the purpose of comparison, microporous carbon was obtained from the copolymer alone, with no addition of colloidal silica. When colloidal silica was added, the micro-mesoporous carbon obtained via this route exhibited a specific surface area approaching 850 m2/g, whereas the microporous carbon had a surface area of approx. 1000 m2/g. The micropore and mesopore volumes accounted for about 50% each to the total pore volume of the micro-mesoporous carbon; as for the microporous carbon, the micropore volume was close to 100% of the total pore volume. In both the carbons, the size of micropores approached 1 nm. In the micro-mesoporous carbon the uniform and spherical mesopores were approx. 25 nm in size, which coincided with the size of the colloidal silica used for the synthesis of this material. Nitrogen adsorption measurements have shown that the mesopores were interconnected and accessible to the molecules of this gas in the course of the process. Moreover, it has been demonstrated that the well-developed microporosity was formed during carbonization due to the thermal decomposition of the copolymer (Saran). Apparently, the method proposed can be used for large-scale preparation of micro-mesoporous carbons.
Źródło:
Ochrona Środowiska; 2009, 31, 1; 3-7
1230-6169
Pojawia się w:
Ochrona Środowiska
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Research of Aggregatic Stability and Bactericidal Activities of Nanosilver Colloidal Solutions
Autorzy:
Yushchishina, Anna
Pasichnyk, Maria
Mitryasova, Olena
Koszelnik, Piotr
Gruca-Rokosz, Renata
Kida, Małgorzata
Powiązania:
https://bibliotekanauki.pl/articles/1811619.pdf
Data publikacji:
2020
Wydawca:
Politechnika Koszalińska. Wydawnictwo Uczelniane
Tematy:
colloidal solution
nanosilver
surface-active substances
SAS
aggregate resistance
bactericidal action
Opis:
The influence of SAS of different chemical nature on aggregate stability and bactericidal action of nano silver colloidal solutions is investigated. Colloidal solutions of silver were obtained by restoring the argentum nitrate agent in a neutral medium. With the help of spectrophotometric method, it has been proved that such solutions are characterized by high aggregate stability compared with the use of other traditional reducing agents. Anionic SAS (sodium dodecylsulfate and sulfanol) and nonionic SAS (OS-20) increase aggregate stability of nano silver solutions, while cationogenic SAS − alcamone promotes rapid coagulation and aggregation of nano silver particles. The study of bactericidal action of the solutions to the E.coli are showed that the nano silve colloidal solution with or without presence of OS-20 and alcamone completely inhibit the growth of colonies of E.coli, that is, it’s have high bactericidal properties.
Źródło:
Rocznik Ochrona Środowiska; 2020, Tom 22, cz. 1; 40-50
1506-218X
Pojawia się w:
Rocznik Ochrona Środowiska
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Radiation synthesis of poly(acrylic acid) nanogels for drug delivery applications – post-synthesis product colloidal stability
Autorzy:
Rurarz, Beata P.
Gibka, Natalia
Bukowczyk, Małgorzata
Kadłubowski, Sławomir
Ulański, Piotr
Powiązania:
https://bibliotekanauki.pl/articles/2055681.pdf
Data publikacji:
2021
Wydawca:
Instytut Chemii i Techniki Jądrowej
Tematy:
colloidal stability
freeze-drying
lyophilization
nanogels
poly(acrylic acid)
radiation synthesis
Opis:
Synthesis of polymer nanogels (NGs) for biomedical applications is considered to be a very promising application in radiation engineering. Under high-dose pulse irradiation of dilute aqueous polymer solution, reactive species generated by water radiolysis can create multiple radicals on each macromolecule and consequently induce intramolecular cross-linking of polymer chains, resulting in NG formation. The obtained products are free from harmful monomers, initiators, and cross-linking agents, which makes them potentially applicable for drug delivery applications. One of the biggest challenges in handling and use of nanoparticles, however, is the colloidal stability, when aqueous suspensions are stored for prolonged periods. Therefore, development of the best protocols for the particular nanocarrier storage is key. To address this need, we have performed the prospective study in which we systematically assessed the influence of various processing and storage scenarios feasible in our lab, on the colloidal stability of the radiation-synthesized poly(acrylic acid) (PAA) NG particles in suspension. This allowed us to choose the optimal way of handling the product after its synthesis. We confirmed that none of the strategies we used and tested are substantially detrimental to our product. Filtration with 0.2-m filters was proven sufficient for sample purification and prolonged storage in aqueous suspension did not exert a negative effect on the colloidal stability of particles suspension. We have also demonstrated that lyoprotectant- -free lyophilization was suitable for our polymer nanoparticles. This is an important fact for further application of particles as nanocarriers for biologically active compounds such as targeting ligands or therapeutic moieties.
Źródło:
Nukleonika; 2021, 66, 4; 179--186
0029-5922
1508-5791
Pojawia się w:
Nukleonika
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Transport cząstek koloidalnych z zaadsorbowanymi jonami arsenu przez mineralne złoże porowate
Transport of colloidal particles with arsenic ions adsorbed on the colloidal surfaces through mineral porous bed
Autorzy:
Wróbel, I.
Polowczyk, I.
Sadowski, Z.
Powiązania:
https://bibliotekanauki.pl/articles/1819759.pdf
Data publikacji:
2009
Wydawca:
Politechnika Koszalińska. Wydawnictwo Uczelniane
Tematy:
jony arsenu
złoża mineralne
cząstki koloidalne
colloidal particles
arsenic ions
minerals
Opis:
Obecność odpadów przemysłowych w środowisku naturalnym staje się coraz bardziej zauważalnym problemem w ochronie środowiska. Za główne źródło ich powstawania, uważa się przemysł wydobywczy i przetwórstwa kopalin. W wyniku prowadzenia procesów wzbogacania, bądź procesów hutniczych, powstają odpady deponowane na hałdach, które w znaczący sposób przyczyniają się do zanieczyszczeń wód gruntowych. Dzieje się tak w wyniku transportu trudno rozpuszczalnych zanieczyszczeń przez naturalny polimineralny ośrodek porowaty. Zjawisko to zostało zaliczone do głównych procesów mających istotny wpływ na zanieczyszczanie wód gruntowych.
The storage of insecure industrial waste, descended from mining and metallurgical industry, has an influence on the pollution of a ground and groundwater. It is a result of migration of toxic substances into the bed of soli. The weathering processes and hydrodynamic changes in soil causes the colloidal particles formation, which are effective contaminations carriers through mineral porous media. In this paper transport of colloidal particles: synthetic hematite and natural kaolin has been investigated. The porous medias were waste from both Szklary and Złoty Stok heaps. The aim of this work is to inspect the influence of arsenate ions on the behaviour of colloidal particles in porous bed. The investigations were conducted in two ionic strengths: 5ź10-3 M KCl and 5ź10-4 M KCl, at pH 9.2-11.6. Results showed that transport of colloidal hematite was facilitated, when arsenic ions were adsorbed onto the colloid particles. Additionally, the increase of mobility of hematite was caused by a decrease of ionic strength. In the case of kaolin transport, the results showed an increase of kaolin particles migration without arsenic ions. These behaviour of colloidal kaolin particles into mineral bed isexplained by different surface property of kaolin particles. Results of examinations on colloidal particles of hematite and kaolin transport through column with mineral bed show, that examined mobility is conditioned with physico-chemical proprieties of colloidal particles and materials of porous bed. Studied colloids, can influence pollution of underground waters in the areas of storing of studied industrial wastes. Results of conducted measurements show, that the process of examined colloidal particles transport is influenced by presence of adsorbed arsenic ions. It is the most perceptible phenomenon in the case of the colloidal hematite, particularly for porous medium built from materials taken from the southern side of heap in Szklary and heap in Złot Stok. Additionally, influence of ion strength on quantity of transported colloidal particles through the layer of porous mineral medium was observed. When ion strength was decreasing, the thickness of the double electric layer increases on colloidal particles. It has impact on decrease of attracting interactions among particles of colloid, and also between colloidal particle and grain of mineral bed. The opposite case was noted during investigations on transportation of colloidal particles of kaolin. Adsorption of arsenic ions by particles of kaolin causes decrease of their mobility. This causes stopping of migration of arsenic ions to underground waters. The similar result is obtained when ion strength is enlarged.
Źródło:
Rocznik Ochrona Środowiska; 2009, Tom 11; 1119-1130
1506-218X
Pojawia się w:
Rocznik Ochrona Środowiska
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Ocena skuteczności mycia linii brzeczki w oparciu o analizę suspensji koloidalnych w instalacjach CIP
An assessment of effectiveness of cleaning of a wort line on the basis of an analysis of colloidal suspensions in CIP installations
Autorzy:
Wawrzacz, B.
Powiązania:
https://bibliotekanauki.pl/articles/290791.pdf
Data publikacji:
2006
Wydawca:
Polskie Towarzystwo Inżynierii Rolniczej
Tematy:
suspensja koloidalna
mycie
CIP
linia brzeczki
colloidal suspensions
washing
wort line
Opis:
Przedyskutowano warunki procesowe programu mycia instalacji linii brzeczki w browarze. Oceniono właściwości chemiczne i fotooptyczne roztworów pobranych na kolejnych etapach mycia. Stwierdzono wytrącanie się bardzo drobnych cząstek w badanych roztworach. Oceniono tendencję tworzenia aglomeratów cząstek o rozdrobnieniu koloidalnym w roztworach myjących. Wyniki badań wskazują na potrzebę modyfikacji programów mycia instalacji CIP, poprzez wydłużenie czasu wszystkich etapów płukania tj. wstępnego, międzyfazowego i końcowego przy jednoczesnym obniżeniu stężenia substancji chemicznych stosowanych w myciu.
Process conditions of the program of washing of installation of wort line in a brewery were discussed. Chemical and photoptical properties of solutions taken at subsequent washing stages were assessed. Precipitation of very small particles was found in the analysed solutions. The tendency of creation of agglomerate particles with colloidal dispersion in washing solution was assessed. The results of the study indicate a need to modify the programs of installation washing with simultaneous decrease of concentration of chemicals used in washing.
Źródło:
Inżynieria Rolnicza; 2006, R. 10, nr 7(82), 7(82); 431-438
1429-7264
Pojawia się w:
Inżynieria Rolnicza
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Investigation of flocculation properties and floc structure of coal processing plant tailings in the presence of monovalent and divalent ions
Autorzy:
Gungoren, Can
Unver, Ilgin Kursun
Ozdemir, Orhan
Powiązania:
https://bibliotekanauki.pl/articles/1845206.pdf
Data publikacji:
2020
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
coal tailings
coagulation
flocculation
floc structure
colloidal particles
monovalent
divalent ions
Opis:
Low-rank coals are generally processed with wet methods including washing, flotation, etc. Fine-sized tailings of these processes are discharged to tailing ponds with a significant amount of associated water which contains a high amount of dissolved ions. These tailings should be dewatered employing coagulation/flocculation in terms of technological and environmental aspects. In this study, the coagulation/flocculation behavior of coal processing plant tailings obtained from Manisa, Turkey was investigated in the presence of monovalent (Na+, K+) and divalent (Mg2+, Ca2+) ions and an anionic flocculant (SPP-600). First, the coagulation properties of coal tailings were determined. Then, the flocculation experiments were carried out, and the turbidity values of the suspensions were measured. Moreover, the sizes of the flocs were determined using a laser diffraction particle size analyzer to analyze the strength of the flocs. The results of the coagulation experiments showed that while divalent ions were more effective at 10-1 mol/dm3, higher settling rate and lower turbidity values were obtained in the presence of monovalent ions at 1 mol/dm3 concentration. The optimum flocculant dosage was obtained as 150 g/Mg from the flocculation experiments. The floc size and strength measurements indicated that the larger flocs were obtained with Na+ than Ca2+ in the presence of the flocculant. The strongest flocs were obtained at 10-1 mol/dm3 Ca2+ + 150 g/Mg flocculant. It can be concluded from this study that the coagulation followed by the flocculation method can be employed to obtain fast flocculation behavior and low turbidity for the dewatering of coal tailings.
Źródło:
Physicochemical Problems of Mineral Processing; 2020, 56, 5; 747-758
1643-1049
2084-4735
Pojawia się w:
Physicochemical Problems of Mineral Processing
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Application of sol-gel process for preparation of functional materials
Autorzy:
Gaishun, V. E.
Demidenko, O. M.
Kosenok, Y. A.
Kovalenko, D. L.
Semchenko, A. V.
Strek, W.
Powiązania:
https://bibliotekanauki.pl/articles/385165.pdf
Data publikacji:
2009
Wydawca:
Sieć Badawcza Łukasiewicz - Przemysłowy Instytut Automatyki i Pomiarów
Tematy:
sol-gel
colored silica film
rust-proofing inorganic covers
colloidal nanosized silica
Opis:
A development of high-performance materials for electronics, optics, ceramics fabrication is restrained by traditional modes of their production. Basic technologies for materials include high-temperature physical and chemical processes and require special conditions to attain desired properties of final products. Advanced preparation methods for materials with new features are feasible on the basis of colloid-chemical processes and nanochemistry. In this respect the sol-to-gel transformation followed by solidification and chemical modification are of great interest to attain a variety of different functional properties of materials.
Źródło:
Journal of Automation Mobile Robotics and Intelligent Systems; 2009, 3, 4; 121-123
1897-8649
2080-2145
Pojawia się w:
Journal of Automation Mobile Robotics and Intelligent Systems
Dostawca treści:
Biblioteka Nauki
Artykuł
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