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Wyświetlanie 1-12 z 12
Tytuł:
The chemical cleaning of ceramic membrane used in UF
Autorzy:
Tomaszewska, M.
Białończyk, L.
Powiązania:
https://bibliotekanauki.pl/articles/779109.pdf
Data publikacji:
2012
Wydawca:
Zachodniopomorski Uniwersytet Technologiczny w Szczecinie. Wydawnictwo Uczelniane ZUT w Szczecinie
Tematy:
ultrafiltration
ceramic membrane
whey; broth
fouling
chemical cleaning
Opis:
Ultrafiltration (UF) is one of the membrane processes which is mostly used in the dairy industry for the separation and concentration of whey components or fermentation broth. Fouling of UF membranes in the food industry is primarily due to a deposition of microorganisms, proteins, fats and minerals on the membrane surface. Thus, cleaning of the membranes is an essential step of UF separation. The results from investigations of chemical cleaning of a ceramic UF membrane fouled by precipitation of whey components and yeast contained in the fermentation broth are presented. The effect of cleaning procedure on the degree of permeability restoration by the fouled membrane was studied. The results demonstrated that a combination of sodium hydroxide, phosphoric acid and sodium hypochlorite as a disinfectant could be successfully used to achieve an optimum recovery of the membrane properties.
Źródło:
Polish Journal of Chemical Technology; 2012, 14, 3; 105-109
1509-8117
1899-4741
Pojawia się w:
Polish Journal of Chemical Technology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Role of Crotalaria verrucosa L. extracts in synthesis of Zinc oxide nanoparticles
Autorzy:
Manokari, M.
Shekhawat, Mahipal S.
Powiązania:
https://bibliotekanauki.pl/articles/1182882.pdf
Data publikacji:
2016
Wydawca:
Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:
crotalaria verrucosa
zinc nitrate
broth solutions
surface plasmon resonance
Opis:
Green synthesis of metal (zinc) oxide nanoparticles is a fascinating subject in the field of nanobiotechnology. Nanoparticles using green plants are suitable for large scale biosynthesis at room temperature with affordable price and eco-friendly nature. The stable nanoparticles were synthesized using leaves, stem, roots, flowers, immature and mature seeds extracts of Crotalaria verrucosa. Zinc Nitrate hexahydrate [Zn(NO3)2•6H2O] was used as precursor material in this experiment. The formation of nanoparticles was monitored by visual color changes and UV-Visible spectrophotometric analysis. UV-Visible absorption peaks between 299-317 nm confirmed the presence of ZnO at nano-scale. The present technique confirmed that this plant species could be explored in the field of nanotechnology for human welfare.
Źródło:
World Scientific News; 2016, 53, 3; 230-240
2392-2192
Pojawia się w:
World Scientific News
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Separation and concentration of succinic adic from multicomponent aqueous solutions by nanofi ltration technique
Autorzy:
Antczak, J.
Regiec, J.
Prochaska, K.
Powiązania:
https://bibliotekanauki.pl/articles/778557.pdf
Data publikacji:
2014
Wydawca:
Zachodniopomorski Uniwersytet Technologiczny w Szczecinie. Wydawnictwo Uczelniane ZUT w Szczecinie
Tematy:
glycerol bioconversion
fermentation broth
succinic acid
nanofiltration
ceramic membrane
Opis:
This paper applies the determined suitability of nanofi ltration (NF) membrane separation for selective isolation and concentration of succinic acid from aqueous solutions which are post-fermentation multicomponent fl uids. The study analyzed the infl uence of concentration and the pH of the separated solutions on the effi ciency and selectivity of NF process that runs in a module equipped with a ceramic membrane. Moreover, the effect of applied transmembrane pressure on the retention of succinic acid and sodium succinate has been studied. The investigations have shown that in the used NF module the retention of succinic acid salt is equal almost 50% in the case of a three-component model solution, although the degree of retention depends on both the transmembrane pressure and the initial concentration of separated salt.
Źródło:
Polish Journal of Chemical Technology; 2014, 16, 2; 1-4
1509-8117
1899-4741
Pojawia się w:
Polish Journal of Chemical Technology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The effect of sonication and stirring on ultrafiltration of fermentation broth
Autorzy:
Lemmer, Balázs
Jákói, Zoltán
Gulyás, Nikolett
Kertész, Szabolcs
Beszédes, Sándor
László, Zsuzsanna
Hodúr, Cecilia
Powiązania:
https://bibliotekanauki.pl/articles/207543.pdf
Data publikacji:
2020
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
sonication
fermentation broth
membrane separation
sonifikacja
brzeczka fermentacyjna
separacja membranowa
Opis:
Membrane separation is a widely used technique whose main obstacle is membrane fouling, during which a solution or particles accumulate on the membrane surface or inside its pores. This phenomenon causes both reversible and irreversible flow resistances that can be minimized with complementary techniques such as sonication and/or stirring. The application of ultrasonic energy can increase the flux by breaking the concentration polarization and cake layer on the membrane surface without affecting the intrinsic permeability of the membrane. Our work focused on cellulase and β-glucosidase enzyme recovery through sonicated/stirred ultrafiltration from the real fermentation broth, at which the fermentation liquid was produced from tobacco plants. Membrane filtrations were carried out in a laboratory-grade batch ultrafiltration cell, extended with stirrer and ultrasound processor. The effects of stirring speed and ultrasound treatment were investigated on the membrane’s permeate flux efficiency and on the quality of recycled enzymes. Resistance values were calculated by the resistance-in-series model, as well as by Hermia’s analysis, to reveal deeper, process-related information. Our results revealed that enzymes could be efficiently separated from real fermentation broth. Furthermore, the enzyme activity test showed that neither stirred nor sonicated processes were detrimental to the enzyme activity.
Źródło:
Environment Protection Engineering; 2020, 46, 1; 49-62
0324-8828
Pojawia się w:
Environment Protection Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Analysis of the bacterial biofilm formation in different models of the in vitro culture
Autorzy:
Bogut, Agnieszka
Magryś, Agnieszka
Powiązania:
https://bibliotekanauki.pl/articles/2040254.pdf
Data publikacji:
2021-03-30
Wydawca:
Uniwersytet Rzeszowski. Wydawnictwo Uniwersytetu Rzeszowskiego
Tematy:
in vitro biofilm
microtiter plate assay
RPMI 1640
tryptic soy broth
Opis:
Introduction. Microtiter plate assay (MPA) remains one of workhorses of in vitro biofilm research but it requires optimization of experimental conditions to fulfill the biofilm formation requirements of different bacterial pathogens. Aim. The aim was to determine the effect of TSB and RPMI1640 culture media and selected culture variables (O2 vs. 5% CO2 , extended incubation time) on the biofilm production by bacteria commonly involved in biofilm-related infections: Enterococcus faecalis (EF), Escherichia coli (EC), Staphylococcus aureus (SA), Pseudomonas aeruginosa (PA), Klebsiella pneumoniae (KP). Material and methods. The investigation was performed using the MPA with crystal violet. Results. Statistically significant (p<0.05) increase in biofilm production between 24h and 72h time points was observed for EF (TSB o2, RPMIo2 and RPMIco2 ), EC (TSBo2 ) , SA (TSBo2 , TSBco2 ), KP (TSBo2 , TSBco2 ), PA (RPMIco2, TSBco2 ). The TSB caused a significantly greater stimulation of biofilm production compared to RPM1640. It outcompeted RPMI1640 irrespective of the atmospheric conditions for SA and KP and under aerobic conditions for EF. Conclusion. Although the TSB provided the most optimal conditions for biofilm production, the process was influenced by the strain type, atmospheric conditions and period of cultivation which limits the ability to design a single universal model of the in vitro biofilm investigation.
Źródło:
European Journal of Clinical and Experimental Medicine; 2021, 1; 40-45
2544-2406
2544-1361
Pojawia się w:
European Journal of Clinical and Experimental Medicine
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Composition of volatile flavor compounds from mackerel head broth and mackerel bone broth, Scomberomorus commerson (Lacepède, 1800)
Autorzy:
Pratama, Rusky Intan
Lana, Adan Prabhasworo
Rostini, Iis
Rizal, Achmad
Powiązania:
https://bibliotekanauki.pl/articles/1076690.pdf
Data publikacji:
2019
Wydawca:
Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:
Broth
Scomberomorus commerson
Solid Phase Microextraction
proximate
volatile flavor compounds
Opis:
Mackerel of Scomberomorus commerson (Lacepède, 1800) is a fish that has thick meat of a distinctive taste and is a favorite of Indonesian people. It is made into various types of processed seafood. The amount of edible flesh of the fish is 65%, meaning that the waste from the fish is 35%, including the head and bones. The purpose of this study was to determine the type and class of volatile compound components that can be drawn from mackerel head and fish bone, by making these into a broth. This study uses an experimental method by testing the composition of volatile flavor compounds and then undertaking proximate testing. The method of extracting volatile flavor compounds that was applied is Solid Phase Microextraction (SPME), while Gas Chromatography / Mass Spectrometry (GC / MS) was harnessed to identify the volatile flavor. Accordingly, 150 compounds were detected in the sample of mackerel head broth, as compared with 133 compounds in mackerel bone broth. The compounds that were detected are hydrocarbons, aldehydes, alcohols, ketones, organic compounds and others. That which has the largest proportion is pentadecane from the hydrocarbon group, with a value of 18,545%. The proximate analysis results showed that mackerel head broth samples had a 96.08% water content, 1.55% ash content, 0.28% fat content and 2.78% protein content, while samples of mackerel bone broth had a 96.69% water content, 1.54% ash content, 0.44% fat content and 1.84% protein content.
Źródło:
World News of Natural Sciences; 2019, 25; 199-219
2543-5426
Pojawia się w:
World News of Natural Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Odpowiedź autorów (23 stycznia 2020) na list do Redakcji dotyczący artykułu „rola środowiska szpitalnego i rąk personelu medycznego w szerzeniu się zakażeń Clostridioides (Clostridium) difficile”
Authors response (January 23, 2020) to the letter to the Editor concerning the paper “The role of hospital environment and the hands of medical staff in the transmission of the Clostridioides (Clostridium) difficile infection”
Autorzy:
Kabała, Monika
Aptekorz, Małgorzata
Martirosian, Gajane
Powiązania:
https://bibliotekanauki.pl/articles/2085453.pdf
Data publikacji:
2020-03-30
Wydawca:
Instytut Medycyny Pracy im. prof. dra Jerzego Nofera w Łodzi
Tematy:
zakażenia w opiece zdrowotnej
Clostridioides (Clostridium) difficile
spory
środowisko szpitalne
przenoszenie spor
C. diff Banana Broth
healthcare-associated infections
spores
hospital environment
transmission of spores
C diff Banana Broth
Źródło:
Medycyna Pracy; 2020, 71, 2; 257-258
0465-5893
2353-1339
Pojawia się w:
Medycyna Pracy
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Zastosowanie wysokosprawnej chromatografii cieczowej (HPLC) do oznaczania polioli w brzeczkach fermentacyjnych
The use of high performance liquid chromatography (HPLC) for determination of polyols in fermentation broth
Autorzy:
Drożdżyńska, A.
Czaczyk, K.
Pawlicka, J.
Powiązania:
https://bibliotekanauki.pl/articles/270671.pdf
Data publikacji:
2010
Wydawca:
Centralny Ośrodek Badawczo-Rozwojowy Aparatury Badawczej i Dydaktycznej, COBRABiD
Tematy:
chromatografia cieczowa
poliole
brzeczki fermentacyjne
liquid chromatography (HPLC)
polyols
fermentation broth
Opis:
Alkohole (etanol, butanol, 1,3-propanodiol, 2,3-butanodiol, glicerol), kwasy organiczne (kw. cytrynowy, kw. bursztynowy, kw. mlekowy, kw. propionowy, kw. masłowy), cukry (glukoza), a także acetoinę rozdzielano na kolumnie Aminex HPX-87H przy zastosowaniu dwóch detektorów - refraktometrycznego i UV-DAD pracujących w układzie szeregowym. Badano wpływ poszczególnych parametrów chromatograficznych na jakość rozdziału. Wyznaczono niektóre parametry walidacyjne dla zaproponowanej metody. Opracowana metoda pozwala na jakościową analizę wielu substancji w brzeczkach fermentacyjnych w szczególności, gdy niektóre z nich koeluują ze sobą.
Alcohols (ethanol, butanol, 1,3-propanediol, 2,3-butanediol, and glycerol), organic acids (citric acid, succinic acid, lactic acid, propionic acid, and butyric acid), sugar (glucose) and acetoin were separated on an Aminex HPX-87H column using two detectors: refractive index detector and UV-DAD detector. The influence of chromatographic parameters on chromatographic separation was analyzed. Some validation parameters for proposed method were determined.
Źródło:
Aparatura Badawcza i Dydaktyczna; 2010, 15, 4; 123-130
2392-1765
Pojawia się w:
Aparatura Badawcza i Dydaktyczna
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Smaki i zapachy dzieciństwa z perspektywy językowo-kulturowej (na podstawie wybranych polskich blogów kulinarnych)
Tastes of Childhood from a Linguistic and Cultural Perspective (Based on Culinary Blogs)
Autorzy:
Jóźwiak, Natalia
Powiązania:
https://bibliotekanauki.pl/articles/1044312.pdf
Data publikacji:
2020-09-23
Wydawca:
Uniwersytet im. Adama Mickiewicza w Poznaniu
Tematy:
linguistic and cultural picture
childhood
values
food
taste
smell
apple pie
broth
Opis:
The article attempts to reconstruct the linguistic and cultural image of childhood tastes in selected culinary blogs. The reconstruction is based on entries referring to two dishes most frequently mentioned in the context of childhood: broth and apple pie.
Źródło:
Poznańskie Studia Polonistyczne. Seria Językoznawcza; 2020, 27, 1; 115-128
1233-8672
2450-4939
Pojawia się w:
Poznańskie Studia Polonistyczne. Seria Językoznawcza
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Oczyszczanie 1,3-propanodiolu z brzeczki fermentacyjnej z zastosowaniem ekskluzji jonów
Separation of 1,3-propanediol from fermentation broth by ion exclusion
Autorzy:
Rukowicz, B
Miesiąc, I.
Alejski, K.
Powiązania:
https://bibliotekanauki.pl/articles/2072900.pdf
Data publikacji:
2014
Wydawca:
Stowarzyszenie Inżynierów i Techników Mechaników Polskich
Tematy:
1,3-propanodiol
brzeczka fermentacyjna
ekskluzja jonów
1,3-propanediol
fermentation broth
ion exclusion
Opis:
W pracy przedstawiono możliwość zastosowania ekskluzji jonów w procesie oczyszczania 1,3-propanodiolu z brzeczki fermentacyjnej. Badania przeprowadzono na kationicie w formie sodowej. Wstępnie odsoloną frakcję produktu uzyskano z ok. 50% wydajnością separacji 1,3-propanodiolu. Stopień odsolenia brzeczki wyniósł 80÷90%, a końcowe oczyszczenie i odbarwienie 1,3-propanodiolu przeprowadzono stosując wymianę jonową. W wyniku procesu otrzymano oczyszczony roztwór 1,3-propanodiolu o stężeniu 16,5 g/L.
Application of ion exclusion for the separation of 1,3-propanediol from fermentation broth was examined. The study was carried out on a cation exchange resin in the sodium form. The product fraction with the desalination degree of 80-90% and 50% separation yield of 1,3-propanediol we obtained. The final purification of 1,3-propanediol was carried out using the ion exchange. As a result of this process the purified solution of 1,3-propanediol (16.5 g/L) was obtained.
Źródło:
Inżynieria i Aparatura Chemiczna; 2014, 4; 288--289
0368-0827
Pojawia się w:
Inżynieria i Aparatura Chemiczna
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The effect of diets supplemented with fish broth and fish oil on the health of weaners
Autorzy:
Bakula, T.
Lis, Ł.
Iwaniuk, Z.
Ordyński, Z.
Powiązania:
https://bibliotekanauki.pl/articles/31425.pdf
Data publikacji:
2011
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
diet supplementation
fish broth
fish oil
animal health
weaner
polyunsaturated fatty acid
zinc
animal feeding
piglet
Opis:
The aim of this study was to determine the effect of fish-based feed materials, as a source of readily available protein contained in fish broth and essential polyunsaturated fatty acids (PUFAs) found in fish oil, on the health of piglets and rearing results. The experiment was conducted on a commercial pig fattening farm. The study involved a total of 80 weaners with an approximate body weight of 15 kg. The experiment was carried out over a period of 40 days. Feed samples were subjected to laboratory analyses. Blood samples were collected from experimental group animals to determine serum biochemical and immunological parameters. The body weight gains of weaners, mortality rates and average feed intake per animal were calculated for the entire experimental period. The addition of fish broth and fish oil significantly improved the n3:n6 fatty acid ratio in diets. The presence of EPA and DHA in the experimental diet could have had a positive health effect on piglets, comparable with that exerted by therapeutic doses of zinc often administered to pigs of this age group. During the experiment, feed conversion ratio (FCR) gain was considerably reduced in the experimental group, with similar daily gains in the control and experimental group.
Źródło:
Polish Journal of Veterinary Sciences; 2011, 14, 2
1505-1773
Pojawia się w:
Polish Journal of Veterinary Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Susceptibility testing of Aspergillus niger strains isolated from poultry to antifungal drugs - a comparative study of the disk diffusion, broth microdilution (M 38-A) and Etest methods
Autorzy:
Tokarzewski, S.
Ziolkowska, G.
Nowakiewicz, A.
Powiązania:
https://bibliotekanauki.pl/articles/32075.pdf
Data publikacji:
2012
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
susceptibility
Aspergillus niger
isolation
poultry
antifungal drug
disk diffusion
broth microdilution method
disc-diffusion method
Etest procedure
aspergillosis
fungal infection
respiratory tract
Opis:
The aim of this study was to determine the sensitivity of Aspergillus niger strains isolated from birds to available antifungal drugs using different in vitro assays - classical disk diffusion, Etest® and broth microdilution NCCLS/CLSI M 38-A. The study material consisted of about 2.000 swabs and samples from different species of birds. A. niger (n=10) was accounted for 6.81% of the total pool of strains isolated. Determinations were made for 13 antifungal drugs using the disk diffusion method. The A. niger exhibited high susceptibility to enilconazole, terbinafine, voriconazole, tioconazole and ketoconazole, low susceptibility to clotrimazole, miconazole and nystatin, and resistance to amphotericin B, itraconazole, pimaricin, fluconazole and 5-fluorocytosine. Minimum inhibitory concentration (MIC) was determined for 9 antifungal drugs using the micromethod of duplicate serial dilutions in a liquid medium. A. niger strains were most susceptible to enilconazole and voriconazole. MIC ranged from 0.0625 to 0.5 μg/ml for enilconazole, with MIC90-0.5 μg/ml and MIC50-0.125 μg/ml. The corresponding values for voriconazole were 0.25-1 μg/ml, 1 μg/ml and 0.5 μg/ml. MIC for amphotericin B and terbinafine ranged from 0.5 to 4 μg/ml, while the values for the remaining drugs were highly varied. MIC was measured by the gradient diffusion method using Etest® for 5 antifungal drugs: amphotericin B, fluconazole, itraconazole, ketoconazole and voriconazole. By far the highest susceptibility was obtained in the case of voriconazole, with MIC ranging from 0.0625 to 1 μg/ml. MIC for amphotericin B ranged from 0.25 to 4 μg/ml, for itraconazole and ketoconazole ranging from 0.5 to 16 μg/ml. Methods available for this purpose are not always applicable in field conditions. The present results indicate that the Etest® technique, due to its high percentage of agreement with the M 38-A microdilution method, should find application in medical and veterinary practice.
Źródło:
Polish Journal of Veterinary Sciences; 2012, 15, 1
1505-1773
Pojawia się w:
Polish Journal of Veterinary Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
    Wyświetlanie 1-12 z 12

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