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Tytuł:
Cellulase Treatment of Acerola Seeds and Its Effect on Physicochemical Properties and Antioxidant Potential of Dietary Fiber-Rich Cookies
Autorzy:
Tran, Van Nguyen
Dang, Diep Xuan Thao
Pham, Thi Kim Oanh
Tran, Thi Quynh Nhi
Ton, Nu Minh Nguyet
Tran, Thi Thu Tra
Le, Van Viet Man
Powiązania:
https://bibliotekanauki.pl/articles/48899277.pdf
Data publikacji:
2024-09-03
Wydawca:
Instytut Rozrodu Zwierząt i Badań Żywności Polskiej Akademii Nauk w Olsztynie
Tematy:
bakery product
cellulolysis
dimensional characteristics
Malpighia emarginata
proximate composition
textural analysis
Opis:
Acerola seeds are a by-product of the food industry, which is rich in dietary fiber and antioxidants. This study evaluated the effects of cellulase treatment conditions, including the initial moisture content, enzyme dose, and incubation time, on the insoluble, soluble, and total dietary fiber content of acerola seed powder (ASP). The blends of wheat flour with untreated and cellulase-treated ASP (0, 10, 15, 20, 25, and 30%, w/w) were then used to produce cookies. The suitable conditions for the enzymatic treatment were the initial moisture content of 6 g/g dry weight (DW), an enzyme dose of 10 U/g DW and incubation time of 90 min. The cookies produced from flour blends with ASP had higher dietary fiber, ascorbic acid and total phenolic contents, and antioxidant capacity, compared to the control cookies without ASP. Phytate content in the cookies obtained with the lowest level of fortification (10%, w/w) was similar to that in the control cookies. The use of cellulase-treated ASP resulted in a lower ratio of insoluble to soluble dietary fiber in the cookies compared to when the untreated ASP was used. In addition, the cookies with cellulase-treated ASP had lower hardness and higher fracturability values than those fortified with the untreated ASP. The overall acceptability of the cookies produced with ASP was higher or comparable to the control cookies. For the first time, the low-cost ASP was used to improve the nutritional quality of cookies. The treated ASP is a novel promising dietary fiber- and antioxidant-rich ingredient for cookie preparation.
Źródło:
Polish Journal of Food and Nutrition Sciences; 2024, 74, 3; 268-279
1230-0322
2083-6007
Pojawia się w:
Polish Journal of Food and Nutrition Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Impact of Sesame (Sesamum indicum L.) Oil Cake on Pasta Physicochemical Properties
Autorzy:
Al-Khamaiseh, Ashraf
Saleh, Mohammed I.
Powiązania:
https://bibliotekanauki.pl/articles/48899266.pdf
Data publikacji:
2024-08-08
Wydawca:
Instytut Rozrodu Zwierząt i Badań Żywności Polskiej Akademii Nauk w Olsztynie
Tematy:
pasta
sesame flour
rheological properties
cooking gain
cooking loss
Opis:
This study was carried out to evaluate the effects of sesame (Sesamum indicum L.) oil cake on pasta processing and the functional characteristics of the end product. The pasta produced from wheat flour fortified with 5, 7.5, 10, 12.5, and 15% (w/w) sesame oil cake showed a significant increase in total protein (i.e., ranging from 12.3 and 16.0 g/100 g), lipid (i.e., 3-fold) and crude fiber (i.e., 0.58 to 0.91 g/100 g) contents with the increasing addition of sesame oil cake. Consistograph tests showed that the pressure maximum decreased significantly from 267.2 kPa for the wheat flour dough (control) to 157.6 kPa upon the addition of 15% (w/w) sesame oil cake to wheat flour. Drop-in pressure after 250 and 450 s was lower for the control sample than for those containing 5, 7.5, 10, 12.5, and 15% (w/w) sesame oil cake. The elasticity value for the control dough was 500.1 Pa, and it was reduced to 392.3 Pa with the addition of 15% (w/w) sesame oil cake to wheat flour resulting also in a significant reduction in the extensibility. The pasta from the flour blend with 7.5% (w/w) sesame oil cake exhibited the highest cooking loss, at 5.40 g/100 g. Sensorial evaluation of the flavor and stickiness of pasta produced from the flour blends containing up to 10% (w/w) of sesame oil cake was satisfactory and recommended to open the door for industrial utilization of such valuable and nutritious by-products. Sesame components and gluten network interactions are believed to play a key role in modifying pasta’s functional characteristics and require more investigation.
Źródło:
Polish Journal of Food and Nutrition Sciences; 2024, 74, 3; 210-220
1230-0322
2083-6007
Pojawia się w:
Polish Journal of Food and Nutrition Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Physicochemical Properties, Antioxidant Capacity and Sensory Acceptability of Instant Rosehip Teas Prepared by Spray-Drying and Freeze-Drying Methods
Autorzy:
Baltaci, Cemalettin
Erkmen Bostanci, Dilara
Altintaş, Rahime
Dalkiran, Yusuf
Akdoğan, Arda
Okan, Onur T.
Powiązania:
https://bibliotekanauki.pl/articles/48899274.pdf
Data publikacji:
2024-08-22
Wydawca:
Instytut Rozrodu Zwierząt i Badań Żywności Polskiej Akademii Nauk w Olsztynie
Tematy:
antioxidants
Rosa canina
instant beverage
lyophilization
phenolics
soluble powder
Opis:
In this study, the physicochemical properties, antioxidant capacity, sensory properties, and phenolic and mineral profiles of instant rosehip teas prepared using spray-drying (SD) and freeze-drying (FD) were compared. The yield of instant tea produced using FD and SD was 23.75 and 21.25 g/100 g, respectively. The total color difference between the FD and SD tea was 50.74, with the SD sample exhibiting higher redness and yellowness. The FD tea was richer in ascorbic acid than SD tea (67.2 and 59.4 mg/100 g dry weight, DW, respectively). The mineral content ranged from 0.20 mg/kg DW (copper) to 2,837 mg/kg DW (potassium) in SD tea, and from 0.31 mg/kg DW (copper) to 3,083 mg/kg DW (potassium) in FD samples. The total phenolic content was 1,315 and 1,495 mg GAE/100 g DW of SD and FD samples, respectively. The antioxidant capacity of instant rosehip teas was determined as total antioxidant capacity, ferric reducing antioxidant power and DPPH radical scavenging activity. In all these assays, FD tea was found to have a higher antioxidant capacity. In the phenolic profile determined by liquid chromatography-tandem mass spectrometry (LC-MS/MS) technique, protocatechuic acid dominated in instant rosehip teas prepared using both methods. The main flavonoids identified were quercetin, quercitrin, hyperoside and luteolin 7-glucoside. Following the sensory analysis, the panelists have generally preferred the FD tea in terms of aroma and flavor, while opting for the SD tea in terms of appearance and color. In conclusion, although freeze-drying allowed obtaining a product with a higher antioxidant capacity and antioxidant content than spray-drying, both drying methods may be considered suitable for the production of instant rosehip teas and ensure obtaining a functional food product.
Źródło:
Polish Journal of Food and Nutrition Sciences; 2024, 74, 3; 244-254
1230-0322
2083-6007
Pojawia się w:
Polish Journal of Food and Nutrition Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Spontaneous Fermentation of Beetroot – Effect of Fermentation Time and Temperature and Slice Thickness on Leaven Quality
Autorzy:
Miszczak, Izabela
Tańska, Malgorzata
Rejmer, Wojciech
Konopka, Iwona
Zielińska, Magdalena
Powiązania:
https://bibliotekanauki.pl/articles/48899276.pdf
Data publikacji:
2024-08-30
Wydawca:
Instytut Rozrodu Zwierząt i Badań Żywności Polskiej Akademii Nauk w Olsztynie
Tematy:
lactic acid fermentation
Beta vulgaris L
physicochemical properties
bioactive compounds
color
Opis:
The aim of this study was to evaluate the influence of selected processing conditions of beetroot spontaneous fermentation, including slice thickness (2, 4, and 6 mm), temperature (15, 20, and 25oC) and fermentation time (1-15 days), on the physicochemical properties of the resulting leaven (total soluble solid content, turbidity, pH, titratable acidity, color parameters, and content of total carbohydrates, total phenolics, total betacyanins and total betaxanthins). All tested conditions had a significant impact on the properties of beet leaven. Among them, fermentation time and temperature were mostly decisive. Slice thickness was important only for short-time fermentation. The preferable pH below 4.1 was achieved between the 4th and 6th day of fermentation, depending on process temperature. Titratable acidity steadily increased and pH decreased throughout the fermentation process, with more pronounced changes observed at the highest temperature. The highest values of total soluble solids (7.25%) and turbidity (1,100 NTU) were noted on the 13th day of fermentation of the thinnest slices at lower temperatures (15oC and 20oC, respectively). The color of the leaven darkened with increasing fermentation time, but the changes in the b* parameter were the most notable. Changes in the content of bioactive compounds were dynamic during beetroot spontaneous fermentation, but higher temperatures promoted increased total phenolic content and total betaxanthin content in the leaven. The optimal fermentation conditions in terms of all tested leaven properties were determined at 6 mm, 20oC and 7 days for slice thickness, temperature and processing time, respectively.
Źródło:
Polish Journal of Food and Nutrition Sciences; 2024, 74, 3; 255-267
1230-0322
2083-6007
Pojawia się w:
Polish Journal of Food and Nutrition Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Activated biocarbons obtained from lignocellulosic precursors as potential adsorbents of ammonia
Autorzy:
Jedynak, Katarzyna
Charmas, Barbara
Powiązania:
https://bibliotekanauki.pl/articles/24085696.pdf
Data publikacji:
2023
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
activated biocarbon
various carbon precursors
physical activation
physicochemical properties
ammonia adsorption
Opis:
The investigated materials were new biocarbons: FC (Fir Cone), FS (Fir Sawdust), FB (Fir Bark), BS (Birch Sawdust), BB (Birch Bark), AS (Acacia Sawdust), AB (Acacia Bark), OS (Oak Sawdust), OB (Oak Bark), HS (Hornbeam Sawdust)) obtained via pyrolysis and CO2 activation of wood waste (lignocellulosic biomass). In order to study the influence of the carbon precursor on the physicochemical properties of biocarbons there were used the precursors: cones, sawdust, and bark of various tree species. The obtained adsorbents were characterized based on the results, of the N2 adsorption, scanning electron microscopy (SEM), elemental analysis (CHNS), thermogravimetry (TG), derivative thermogravimetry (DTG), and differential thermal analysis (DTA), Fourier Transform Infrared Spectroscopy FT-IR (ATR) and the Boehm’s titration method as well as pHpzc (the point of zero charge). The adsorption capacity and the temperature-programmed desorption (TPD) of ammonia were also studied. The obtained activated biocarbons were characterized by the large specific surface area (515 to 1286 m2/g) and the total pore volume (0.27 to 0.46 cm3/g) as well as the well-developed microporous structure (76 - 90%). The maximum NH3 adsorption capacity of the activated biocarbon was determined to be 2.93 mmol/g (FC (Fir Cone)). These results prove that the lignocellulosic precursors are appropriate for preparation of environmentally friendly and cost-effective biocarbons.
Źródło:
Physicochemical Problems of Mineral Processing; 2023, 59, 4; art. no. 169835
1643-1049
2084-4735
Pojawia się w:
Physicochemical Problems of Mineral Processing
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Analiza właściwości fizykochemicznych materiału z biomasy w formie pelletu z łupiny orzecha włoskiego
Analysis of Physicochemical Properties of Pellets Made from Walnut Shells
Autorzy:
Nabiałczyk, Michał
Musiał, Dorota
Bala-Litwiniak, Agnieszka
Lipiński, Tomasz
Nowacki, Krzysztof
Powiązania:
https://bibliotekanauki.pl/chapters/27323523.pdf
Data publikacji:
2023-12-14
Wydawca:
Politechnika Częstochowska. Wydawnictwo Politechniki Częstochowskiej
Tematy:
łupina orzecha włoskiego
materiały z biomasy
paliwa alternatywne
właściwości fizykochemiczne
alternative fuels
biomass materials
physicochemical properties
walnut shell
Opis:
W rozdziale zaprezentowano możliwość wykorzystania materiału z biomasy w formie łupiny orzecha włoskiego do produkcji paliwa stałego w postaci granulatu. Celem badania było wytworzenie pelletu i sprawdzenie jego właściwości fizykochemicznych. Przeprowadzone badania obejmują określenie zwartości popiołu, części lotnych, wilgoci, gęstości nasypowej oraz ciepła spalania wytworzonego paliwa. Otrzymane wyniki pozwoliły na ustalenie przydatności łupiny orzecha w przemyśle energetycznym i określenie jakości wytworzonego paliwa.
The chapter presents the possibility of using biomass material in the form of walnut shells for the production of solid fuel in the form of granules. The aim of the study was to produce a pellet and check its physicochemical properties. The tests carried out include the content of ash, volatile parts, moisture, bulk density and heat of combustion of the produced fuel. The obtained results made it possible to determine the usefulness of walnut shells in the energy industry and to determine the quality of the produced fuel.
Źródło:
Potencjał innowacyjny w inżynierii materiałowej i zarządzaniu produkcją; 367-374
9788371939457
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Effect of Dry, Vacuum, and Modified Atmosphere Ageing on Physicochemical Properties of Roe Deer Meat
Autorzy:
Kasałka-Czarna, Natalia
Biegańska-Marecik, Róża
Proch, Jędrzej
Orłowska, Aleksandra
Montowska, Magdalena
Powiązania:
https://bibliotekanauki.pl/articles/16538545.pdf
Data publikacji:
2023-05-25
Wydawca:
Instytut Rozrodu Zwierząt i Badań Żywności Polskiej Akademii Nauk w Olsztynie
Tematy:
roe deer
protein oxidation
lipid oxidation
vacuum
modified atmosphere
dry-ageing
Opis:
Consumers around the world are choosing sustainable and unprocessed foods. Roe deer meat, due to the natural origin, is a source of organic and healthy meat. The selection of suitable storage conditions and times plays an important role in a deterioration of the meat's functional and nutritional values. The knowledge about oxidation processes in roe deer meat stored and packed deploying different methods is limited. The main aim of this study was therefore to investigate the effect of storage method on the physicochemical properties of musculus longissimus thoracis et lumborum (LTL), musculus biceps femoris (BF), and musculus vastus lateralis (VL) of roe deer. The muscles were stored either dry (DRY-AGED), vacuum-packed (VAC), or packed under modified atmosphere (MAP) for 21 days. The quality of roe deer meat was assessed based on chemical composition, technological properties, pH values, water activity, colour, and oxidation processes of proteins and lipids. Roe deer meat had high protein (216.5–228.6 g/kg) and low fat content (17.1–25.8 g/kg). Both DRY-AGED and VAC contributed to improving meat tenderness during storage, while the Warner–Bratzler shear force of the MAP muscles increased. The high-oxygen conditions during MAP storage strongly induced the oxidation processes; an average increase of 1263% for thiobarbituric acid reactive substance (TBARS) level and 155% for protein carbonyl content on day 21. Vacuum packaging and dry-ageing are recommended methods for storing roe deer meat. The high oxygen atmosphere negatively affected the quality of this game species. It carries the risk of increased oxidation of proteins and lipids which may promote the formation of potentially detrimental compounds.
Źródło:
Polish Journal of Food and Nutrition Sciences; 2023, 73, 2; 175-186
1230-0322
2083-6007
Pojawia się w:
Polish Journal of Food and Nutrition Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Features of Refuse Derived Fuel in Poland – Physicochemical Properties and Availability of Refuse Derived Fuel
Autorzy:
Nowak, Martyna
Powiązania:
https://bibliotekanauki.pl/articles/24201786.pdf
Data publikacji:
2023
Wydawca:
Polskie Towarzystwo Inżynierii Ekologicznej
Tematy:
waste management
waste incineration
waste to energy
refuse derived fuel
Opis:
Refuse Derived Fuels are used as energy carrier mainly in cement plants; however, more and more often they are applied in power plants as a substitute for fossil fuels. In order to prepare a proper waste-to-energy investment, the availability of the fuel, as well as fuel properties should be determined. The article presented the amounts of generated RDF in Poland, number installation which produced RDF in 2019 and 2020 and amounts of incinerated RDF in cement and incineration plants. The amount of generated RDF is rather constant – about 2.5 million Mg/year. RDF is mainly incinerated in cement plants – about 1.5 million Mg/year. The article also presented general physicochemical analysis of several RDF samples and coal. Some of the RDF samples reached high energy parameters – low heating value up to 25 MJ/kg; however, the properties vary a lot, due to their heterogeneous character, technological process of their production and other factors. In practice, the requested parameters and amount of RDF are established and the RDF producer prepares and delivers the fuel according to the concluded contract.
Źródło:
Journal of Ecological Engineering; 2023, 24, 3; 1--9
2299-8993
Pojawia się w:
Journal of Ecological Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
FTIR fingerprint — testing a new representation of the binary fingerprint based on FTIR spectra in the prediction of physicochemical properties
Autorzy:
Tomaszewski, Kacper
Kurczab, Rafał
Powiązania:
https://bibliotekanauki.pl/articles/29521107.pdf
Data publikacji:
2023
Wydawca:
Akademia Tarnowska
Tematy:
binary fingerprint
FTIR spectroscopy
Savitzky-Golay filter
FEDS
prediction models
physicochemical properties
binarny odcisk palca
spektroskopia FTIR
filtr Savitzky'ego-Golaya
modele prognostyczne
właściwości fizykochemiczne
Opis:
The paper deals with the development of a new method for the generation of binary fingerprints based on the Savitzky-Golay (SG) algorithm and first-order derivatives of FTIR spectra, which are then used to create prediction models for selected the physicochemical properties of chemical compounds. Models based on the FEDS (Functionally- Enhanced Derivative Spectroscopy) transformation and raw spectra were used as a reference to determine whether the use of the SG filter and first-order derivatives was worth to further develop. The FTIR spectra of 103 compounds with theoretically determined values of logP, logD and logS were studied. The Tanimoto coefficient and correlation coefficient were used to compare the fingerprints obtained, while the root mean square error (RMSE) was used to assess the quality of the prediction models. Based on the results, it was found that the use of the SG filter and derivatives had a positive effect on the quality of the prediction models for logP and logS, and a negative effect on the quality of the models for logD, compared to the models based on original spectra and FEDS transformation.
Źródło:
Science, Technology and Innovation; 2023, 17, 1-2; 9-29
2544-9125
Pojawia się w:
Science, Technology and Innovation
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Microbiological Quality and Physicochemical Characteristics of Pork Livers Supplied by an Industrial Slaughterhouse
Autorzy:
Feliu-Alsina, Narcís
Saguer, Elena
Powiązania:
https://bibliotekanauki.pl/articles/16538541.pdf
Data publikacji:
2023-05-05
Wydawca:
Instytut Rozrodu Zwierząt i Badań Żywności Polskiej Akademii Nauk w Olsztynie
Tematy:
meat by-products
valorisation
pork liver
thermal properties
solubility
chemical composition
Opis:
Pork liver is a by-product generated daily in large quantities due to the high number of pigs slaughtered and its relatively high weight in relation to the carcass weight. However, it is not widely accepted by consumers for direct consumption due to its organoleptic properties. The present work aims to provide information of interest that may be useful for obtaining protein extracts from pork liver with potential as techno-functional ingredients. Specifically, the obtained results indicate that pork liver has a high protein content, with collagen representing only a small protein fraction and being poor in non-protein nitrogenous compounds. In addition, from the solubility profile obtained in the pH range from 4.8 to 8.5, high extraction yields can be expected at alkaline pH. However, and despite the high microbiological quality of pork livers properly collected and processed, their pH, water content and nutritional richness make them highly susceptible to microbiological spoilage.
Źródło:
Polish Journal of Food and Nutrition Sciences; 2023, 73, 2; 130-138
1230-0322
2083-6007
Pojawia się w:
Polish Journal of Food and Nutrition Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Physicochemical properties and NH3-SCR catalytic performance of intercalated layered aluminosilicates
Autorzy:
Szymaszek-Wawryca, Agnieszka
Díaz, Urbano
Samojeden, Bogdan
Motak, Monika
Powiązania:
https://bibliotekanauki.pl/articles/24085707.pdf
Data publikacji:
2023
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
bentonite
DeNOx
pillaring
iron
copper
Opis:
The representative of natural layered clays, bentonite, was modified according to two routes and tested as a new catalyst for selective catalytic reduction of nitrogen oxides with ammonia (NH3-SCR). The natural acid-activated clay was ion-exchanged with Na+ or remained in H-form and pillared with metal oxides. In order to limit the number of synthesis steps, iron as an active phase was introduced simultaneously with Al2O3 during the intercalation procedure. Additionally, the samples were doped with 0.5 wt% of copper to promote low-temperature activity. It was found that the performed modifications resulted in disorganization of the ordered layered arrangement of bentonite. Nevertheless, acid activation and pillaring improved structural and textural parameters. The results of catalytic tests indicated that the samples containing Fe2O3 pillars promoted with Cu exhibited the highest NO conversion of 85% at 250°C (H-Bent-AlFe-Cu) and 75% at 300°C (Na-Bent-AlFe-Cu). What is important, activity of the protonated samples in the high-temperature region was noticeably affected by the side reaction of ammonia oxidation, correlated with the production of NO and resulting in N2O emission during the process comparing to Na-Bentonite catalysts.
Źródło:
Physicochemical Problems of Mineral Processing; 2023, 59, 4; art. no. 171381
1643-1049
2084-4735
Pojawia się w:
Physicochemical Problems of Mineral Processing
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Physicochemical Properties, Antioxidant Capacity, and Consumer Acceptability of Ice Cream Incorporated with Avocado (Persea Americana Mill.) Pulp
Autorzy:
Moolwong, Jutamas
Klinthong, Worasaung
Chuacharoen, Thanida
Powiązania:
https://bibliotekanauki.pl/articles/16538556.pdf
Data publikacji:
2023-09-06
Wydawca:
Instytut Rozrodu Zwierząt i Badań Żywności Polskiej Akademii Nauk w Olsztynie
Tematy:
avocado pulp
fiber-rich ice cream
antioxidant capacity
textural property
Opis:
Avocado pulp is low in sugar contents but quite high in dietary fiber, nutrients, and phytochemicals with potential health benefits. In this study, the avocado pulp was incorporated into ice cream. The effects of replacing milk fat with avocado on the physical and chemical properties of ice cream and consumer acceptability were evaluated. Milk fat-based ingredients of the ice cream were partially replaced with avocado pulp at ratios of 10, 20, and 30% (w/w). All ice creams were subjected to physical and chemical analyses and were evaluated in sensory acceptability tests. Replacing milk fat with avocado pulp significantly reduced moisture content, protein, and fat content, while it increased the carbohydrate (3.70 to 7.91 g/100 g) and crude fiber content (0.39 to 1.38 g/100 g). A higher content of avocado pulp caused a reduction in overrun and retarded the melting rate due to the effect of high fiber content. Increased viscosity and hardness were observed. The ice cream with the highest avocado pulp content had approximately 3-fold higher total phenolic content determined by the Folin-Ciocalteau method and 2-fold higher antioxidant capacity evaluated as DPPH• and ABTS•+ scavenging activity, and ferric reducing antioxidant power compared to that of the control. Sensory evaluation showed the 20% (w/w) avocado pulp was the suitable ratio for incorporating in the ice cream, which showed a good level of overall acceptability. Thus, our results suggest the potential use of avocado pulp to replace milk fat in frozen dairy products.
Źródło:
Polish Journal of Food and Nutrition Sciences; 2023, 73, 3; 289-296
1230-0322
2083-6007
Pojawia się w:
Polish Journal of Food and Nutrition Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Physicochemical properties of flour and starch obtained from various quinoa varieties
Właściwości fizykochemiczne mąki i skrobi otrzymanych z różnych odmian komosy
Autorzy:
Rożnowski, J.
Przetaczek-Rożnowska, I.
Powiązania:
https://bibliotekanauki.pl/articles/29433476.pdf
Data publikacji:
2023
Wydawca:
Wydawnictwo Uniwersytetu Ekonomicznego we Wrocławiu
Źródło:
Nauki Inżynierskie i Technologie; 2023, 39; 1-13
2449-9773
2080-5985
Pojawia się w:
Nauki Inżynierskie i Technologie
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Physicochemical Properties of Marl and Travertine and their Thermally Modified Forms in the Perspective of Phosphorus Removal from Wastewater
Autorzy:
Gubernat, Sylwia
Masłoń, Adam
Czarnota, Joanna
Koszelnik, Piotr
Powiązania:
https://bibliotekanauki.pl/articles/24201764.pdf
Data publikacji:
2023
Wydawca:
Polskie Towarzystwo Inżynierii Ekologicznej
Tematy:
wastewater treatment
green chemistry
ecotechnology
reactive material
adsorption
phosphorus
Opis:
The paper presents physicochemical studies of nine reactive materials for removing phosphorus from wastewater and water. The materials under analysis are raw forms of marl and travertine along with their thermally treated forms at temperatures of 500 °C, 650 °C, 700 °C (travertine), 700 °C, 900 °C, 1000 °C (marl) and the commercial material Polonite®. The scope of the research included morphological analysis and elemental composition, specific surface area, pore volume and diameter, losses on ignition and the amount of elements leached from materials. The results of the research allowed assessing the impact of physicochemical properties and thermal modification on the efficiency of phosphorus binding by these materials. All the tested sorbents show the highest calcium content among the elements with the ability to bind phosphorus. The size of the specific surface does not determine the efficiency of phosphorus retention by the tested materials; therefore it is advisable to study the mechanism of its binding. The thermal modification process, along with the increase in the treatment temperature, improves the regularity of marl and travertine structures, which also manifests itself in increasing the efficiency of phosphorus removal.
Źródło:
Journal of Ecological Engineering; 2023, 24, 5; 56--65
2299-8993
Pojawia się w:
Journal of Ecological Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The experimental study of the effect of magnetically sensitive elastomers on oil recovery of reservoirs containing high-viscosity oils
Badania eksperymentalne wpływu wrażliwych magnetycznie elastomerów na wydobycie ze złóż rop naftowych o wysokiej lepkości
Autorzy:
Mustafayeva, Rena E.
Powiązania:
https://bibliotekanauki.pl/articles/31343979.pdf
Data publikacji:
2023
Wydawca:
Instytut Nafty i Gazu - Państwowy Instytut Badawczy
Tematy:
magnetic field
high-viscosity
silicone
oligomer
oil
polymer
physicochemical properties
pole magnetyczne
wysoka lepkość
silikon
olej
polimer
właściwości fizykochemiczne
Opis:
In world practice, low-viscosity oil accounts for the main share of production. As the development progresses, the share of high-viscosity oil in the total balance increases year on year. The growing unused reserves of high-viscosity oil oblige researchers to solve the issue of developing these reserves, which is an important task for the oil industry. Studies have been carried out to increase oil recovery during the development of oil reservoirs containing high-viscosity oil by pumping a solution of magnetically active polymer, namely silicone oligomer, the matrix of which contains 5–25% Fe+3 ions, treated with a constant transverse magnetic field with a strength of H = 51740 A/m. A mixture of 90% by weight of quartz sand and 10% by weight of bentonite clay, with a permeability of k = 1.4 D, was used as a reservoir model. The high-viscosity oil model consisted of St-45 aviation oil. A silicone oligomer of 159–360 brand was used as a matrix with an operating temperature range of 60°C to +300°C, into which particles of gamma-Fe2O3 Nano powder with a size of 0.5 nm are introduced, with a degree of filling of the matrix of 5–25% by volume of Fe. Magnetization saturation is 80 emu/g, residual magnetization is 460 emu/g, and coercive force is 670 Oh. Validation of the proposed method was carried out by physical modeling of the process of displacement of high-viscosity oil with a magnetic elastomer on a laboratory installation. The oil recovery coefficient was calculated according to a wellknown method. The use of magnetically sensitive polymer can be an effective method of developing heavy oil fields. For each heavy oil field, taking into account its specifics (reservoir properties of the rock, physicochemical properties of oil, etc.), an appropriate magnet active polymer is selected. As the experimental results show, the best indicator of the oil recovery coefficient is achieved at 65%, compared with 48% of recovery in the absence of magnetic field exposure.
W praktyce światowej główną część produkcji stanowią ropy o niskiej lepkości. W miarę postępu rozwoju udział rop o dużej lepkości w ogólnym bilansie rośnie z roku na rok. Rosnące niewykorzystane zasoby ropy naftowej o wysokiej lepkości obligują badaczy do rozwiązania kwestii zagospodarowania tych zasobów, co jest ważnym zadaniem dla przemysłu naftowego. W czasie zagospodarowania złóż ropy naftowej o dużej lepkości prowadzone były badania nad zwiększeniem wydobycia ropy poprzez tłoczenie roztworu magnetycznie aktywnego polimeru, jakim jest oligomer silikonowy, którego matryca zawiera 5–25% jonów Fe+3, poddanego działaniu stałego poprzecznego pola magnetycznego o natężeniu H = 51740 A/m. Jako model złoża zastosowano mieszaninę: 90% mas. piasku kwarcowego i 10% mas. glinki bentonitowej, o przepuszczalności k = 1,4 D. Modelem ropy o dużej lepkości był olej lotniczy St-45. Jako matrycę o zakresie temperatur pracy od 60°C do +300°C zastosowano oligomer silikonowy marki 159–360, do którego wprowadzone zostały cząsteczki nanoproszku gamma-Fe2O3 o rozmiarach 0,5 nm, a stopień wypełnienia matrycy jest w zakresie 5–25% obj. Fe. Nasycenie magnetyczne wynosi 80 emu/g, namagnesowanie szczątkowe wynosi 460 emu/g, a siła koercji wynosi 670 Oh. Walidację proponowanej metody przeprowadzono poprzez fizyczne modelowanie procesu wypierania oleju o dużej lepkości elastomerem magnetycznym w instalacji laboratoryjnej. Współczynnik odzysku oleju obliczono według znanej metody. Zastosowanie magnetycznie czułego polimeru może być skuteczną metodą zagospodarowania złóż ciężkich rop. Dla każdego złoża ciężkiej ropy naftowej, biorąc pod uwagę jego specyfikę (właściwości skały zbiornikowej, właściwości fizykochemiczne ropy itp.), dobierany jest odpowiedni polimer magnetycznie aktywny. Z eksperymentu wynika, że najlepszy współczynnik odzysku oleju osiągnięto na poziomie 65%, w porównaniu z 48% odzysku przy braku ekspozycji na pole magnetyczne.
Źródło:
Nafta-Gaz; 2023, 79, 2; 110-113
0867-8871
Pojawia się w:
Nafta-Gaz
Dostawca treści:
Biblioteka Nauki
Artykuł
Wyświetlanie 1-15 z 375

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