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Wyświetlanie 1-14 z 14
Tytuł:
Sprouts as potential sources of dietary antioxidants in human nutrition
Autorzy:
Zujko, M.E.
Terlikowska, K.M.
Zujko, K.
Paruk, A.
Witkowska, A.M.
Powiązania:
https://bibliotekanauki.pl/articles/1918350.pdf
Data publikacji:
2016
Wydawca:
Uniwersytet Medyczny w Białymstoku
Tematy:
Antioxidant potential
polyphenol
flavonoid
sprouts
Opis:
Purpose: The present study evaluates antioxidant activity, as well as polyphenol and flavonoid contents in common sprouts, available on the Polish market. The aim of this study was to extend our already published food databases. Materials and methods: Ten seed species from four plant families were analysed. Total polyphenol content of sprout extracts was determined using the Folin-Ciocalteau method. Total flavonoid content was assessed by the aluminium chloride colorimetric method. Total antioxidant status was measured using FRAP and ABTS methods. Results: The FRAP antioxidant potential was 0.60- 2.53 mmol TE (trolox equivalents)/100 g FM (fresh mass), and arranged in descending order it was: white mustard>cress>radish>broccoli>chickpea> sunflower>mung bean>wheat>green lentil>alfalfa), while the ABTS potential was 3.92-16.19 mmol TE/100 g FM (according to decreasing value: white mustard>green lentil>chickpea>sunflower>mung bean>cress> alfalfa>wheat> broccoli> radish). The polyphenol content was 160-774 mg GAE (gallic acid equivalents)/100 g FM, and flavonoid content 15-53 mg QE (quercetin equivalents)/100 g FM. Conclusion: Our results suggest that sprouts in comparison to other foods, despite small weight can be powerful sources of antioxidants. Special attention in human nutrition should be paid to white mustard sprouts as they are excellent source of polyphenol and flavonoid and are characterized by tremendous antioxidant activity.
Źródło:
Progress in Health Sciences; 2016, 6(2); 77-83
2083-1617
Pojawia się w:
Progress in Health Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Improving growth indices and productivity of phytochemical compounds in lemon balm (Melissa officinalis L.) through induced polyploidy
Autorzy:
Talei, D.
Fotokian, M.H.
Powiązania:
https://bibliotekanauki.pl/articles/2097129.pdf
Data publikacji:
2020
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
colchicine
flavonoid
lemon balm
physiological traits
rosmarinic acid
Opis:
The induction of polyploidy using mutagenic chemicals is one of the plant breeding methods to enhance the production of secondary metabolites. In the current research, to induce polyploidy in lemon balm (Melissa officinalis) plants, seeds were treated with different concentrations of colchicine for various exposure times. A factorial experiment was performed using a randomized complete block design with two factors: colchicine concentrations with four levels (control, 0.05%, 0.1%, and 0.2%) and exposure times with three levels (24, 48, and 72 h) and three replicates. The physiological and phytochemical traits of plants were measured at a 4–6 leave stage. The results indicated that different concentrations of colchicine had a significant effect on the chlorophyll a (Chl.a), chlorophyll b (Chl.b), carotenoid, phenol, flavonoid, and rosmarinic acid contents. The exposure times of colchicine also caused significant changes in Chl.a, Chl.b, carotenoid, phenol, flavonoid, and rosmarinic acid amounts (P # 0.01). Increasing the colchicine concentration significantly increased the physiological and phytochemical traits at 0.05% and 0.1% concentration in comparison to the control (P # 0.01). In contrast, the interaction of colchicine concentration and exposure time had a significant effect on Chl.a, Chl.b, carotenoid, and rosmarinic acid amounts. The findings of this study indicate that one of the effective methods in primary screening of polyploidy plants in the polyploidization breeding program is the estimation of the physiological changes, the contents of chlorophyll a and b, and the total amount of chlorophyll and secondary metabolites. Flow cytometry is recommended to be used for the accurate identification of the ploidy level in M. officinalis.
Źródło:
BioTechnologia. Journal of Biotechnology Computational Biology and Bionanotechnology; 2020, 101, 3; 215-226
0860-7796
Pojawia się w:
BioTechnologia. Journal of Biotechnology Computational Biology and Bionanotechnology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Green corrosion inhibitor for mild steel in 2 M HCl solution: Flavonoid extract of Erigeron floribundus
Autorzy:
Abeng, Fidelis Ebunta
Idim, Veronica David
Powiązania:
https://bibliotekanauki.pl/articles/1177856.pdf
Data publikacji:
2018
Wydawca:
Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:
Erigeron floribundus
Flavonoid
Green inhibitor
corrosion
mild steel
Opis:
The potential of flavonoid extract of Erigeron floribundus as green inhibitor for the corrosion of mild steel in 2 M HCl solution was studied using gasometric method. The results obtained, indicated that the extract is an adsorption inhibitor for the corrosion of mild steel. The inhibition efficiency of the inhibitor was found to increased with increase in concentration of the inhibitor. From the observed trend for the variation of inhibition efficiency with temperature and the range of value obtained from activation energy (16.16-3.02 KJmol-1), enthalpy (13.5-38.84 KJmol-1), entropy (-22.67 to 88.44 KJmol-1) and free energy (-4.23 to -2.61 KJmol-1), a chemical and physical adsorption mechanism is propose for the adsorption of the inhibitor on the mild steel surface. In addition, the adsorption is endothermic, spontaneous and is best described by Langmuir adsorption isotherm.
Źródło:
World Scientific News; 2018, 98; 89-99
2392-2192
Pojawia się w:
World Scientific News
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Physicochemical Characterization of Pomegranate (Punica Granatum L.) Native to Jordan During Different Maturity Stages: Color Evaluation Using the Cielab and Cielch Systems
Autorzy:
Pérez, Soraya Mercedes
Powiązania:
https://bibliotekanauki.pl/articles/1838280.pdf
Data publikacji:
2021
Wydawca:
Polskie Towarzystwo Inżynierii Ekologicznej
Tematy:
anthocyanin
antioxidant capacity
aril juice color
flavonoid
phenol
Opis:
Punica granatum L. study is interesting for the functional properties associated to its Phenolic compounds and high volumes of production of this fruit in Jordan. The pomegranate type "pale arils" from Abu Ziyad valley were evaluated during different stages between 20 to 140 days after full bloom, with techniques of chelation, colorimetry and spectrophotometry. The results show that the increasing of sphericity (0.79 to 0.91), size diameter (65.58 to 90.41 mm), juice yield (46.03 to 55.67%), arils mass (31.70 to 61.23%), TSS total soluble solids (11.01 to 16.80), pH (2.7 to 3.6) and anthocyanins (7.43 to 12.41 Cyannidine 3 glucoside/100 g) were associated with the decreasing of thickness of the rind (4.9 to 2.77 mm), TTA Titrable total acidity (3.5 to 1.1%), TPC Total phenolics (389.61 to 251.52 mg Gallic acid/100 g), flavonoids (0.73 to 0.40 mg Catechine/g), tannins (8940.11 to 3324.79 ppm), AA Antioxidant Activity (63.41 to 48.84%) and Ascorbic acid content (28.91 to 9.48 mg/100 g); presenting significant differences p≥0,5. The paleness of rind and arils is positively related to the anthocyanin content expressed by "a" and "C" color coordinates. The actual investigation demonstrates that high values TSS-pH, low content of tannins and TTA could be successfully indicators of maturity stages rather than the concentration of anthocyanins.
Źródło:
Journal of Ecological Engineering; 2021, 22, 6; 214-221
2299-8993
Pojawia się w:
Journal of Ecological Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Physicochemical Characterization of Pomegranate (Punica Granatum L.) Native to Jordan During Different Maturity Stages: Color Evaluation Using the Cielab and Cielch Systems
Autorzy:
Pérez, Soraya Mercedes
Powiązania:
https://bibliotekanauki.pl/articles/1838359.pdf
Data publikacji:
2021
Wydawca:
Polskie Towarzystwo Inżynierii Ekologicznej
Tematy:
anthocyanin
antioxidant capacity
aril juice color
flavonoid
phenol
Opis:
Punica granatum L. study is interesting for the functional properties associated to its Phenolic compounds and high volumes of production of this fruit in Jordan. The pomegranate type "pale arils" from Abu Ziyad valley were evaluated during different stages between 20 to 140 days after full bloom, with techniques of chelation, colorimetry and spectrophotometry. The results show that the increasing of sphericity (0.79 to 0.91), size diameter (65.58 to 90.41 mm), juice yield (46.03 to 55.67%), arils mass (31.70 to 61.23%), TSS total soluble solids (11.01 to 16.80), pH (2.7 to 3.6) and anthocyanins (7.43 to 12.41 Cyannidine 3 glucoside/100 g) were associated with the decreasing of thickness of the rind (4.9 to 2.77 mm), TTA Titrable total acidity (3.5 to 1.1%), TPC Total phenolics (389.61 to 251.52 mg Gallic acid/100 g), flavonoids (0.73 to 0.40 mg Catechine/g), tannins (8940.11 to 3324.79 ppm), AA Antioxidant Activity (63.41 to 48.84%) and Ascorbic acid content (28.91 to 9.48 mg/100 g); presenting significant differences p≥0,5. The paleness of rind and arils is positively related to the anthocyanin content expressed by "a" and "C" color coordinates. The actual investigation demonstrates that high values TSS-pH, low content of tannins and TTA could be successfully indicators of maturity stages rather than the concentration of anthocyanins.
Źródło:
Journal of Ecological Engineering; 2021, 22, 6; 214-221
2299-8993
Pojawia się w:
Journal of Ecological Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Total phenolic, flavonoid content and antioxidant capacity of stem bark, root, and leaves methanolic extract of Rhizophora mucronata Lam.
Autorzy:
Mulyani, Yeni
Syaputra, Nabil Dio
Dewi, Khoirunisa Candra
Lili, Walim
Agung, M. Untung Kurnia
Powiązania:
https://bibliotekanauki.pl/articles/1076655.pdf
Data publikacji:
2019
Wydawca:
Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:
Antioxidant
Flavonoid
Indramayu Regency
Phenolic
Rhizophora mucronata
Secondary metabolites
Opis:
The study was carried out to evaluate the phytochemical constituents, antioxidant activity and the content of total phenolic and flavonoid in the methanolic extract from stem bark, root, and leaves of Rhizophora mucronata from Karangsong, Indramayu Regency, West Java, Indonesia. The antioxidant activity was evaluated using 2,2-diphenyl-1-picrilhydrazyl (DPPH) assay. Total phenolic and flavonoid contents were determined according respectively to Folin-Ciocalteau method, and aluminium trichloride method. The methanol extract from stem bark of R. mucronata contained secondary metabolite such as phenolic, flavonoid, tannin and saponin. The stem bark of R. mucronata showed the highest phenolic and flavonoid content and possessed a higher antioxidant activity (IC50 84.80 µg·m/L) than that of root (IC50 166.95 µg·m/L) and leaves (IC50 90.51 µgmL1). Total phenolic and flavonoid content in the stem bark of R. mucronata were 131.91 ±1.7 mg gallic acid equivalents/g and 902 ±0.7 mg quercetin equivalents/g, respectively.
Źródło:
World News of Natural Sciences; 2019, 26; 118-127
2543-5426
Pojawia się w:
World News of Natural Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Sprouting Exert Significant Influence on the Antioxidant Activity in Selected Pulses (Black Gram, Cowpea, Desi Chickpea and Yellow Mustard)
Autorzy:
Khyade, Vitthalrao B.
Jagtap, Sharad G.
Powiązania:
https://bibliotekanauki.pl/articles/1190118.pdf
Data publikacji:
2016
Wydawca:
Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:
Ascorbic acid
β-carotene
DPPH
flavonoid
sprouts
total antioxidant activity
Opis:
Pulses are a vital source of plant-based proteins and amino acids for people around the globe and should be eaten as part of a healthy diet to address obesity, as well as to prevent and help manage chronic diseases such as diabetes, coronary conditions and cancer; they are also an important source of plant-based protein for animals. Pulses provide protein and fibre, as well as a significant source of vitamins and minerals, such as iron, zinc, folate, and magnesium, and consuming half a cup of beans or peas per day can enhance diet quality by increasing intakes of these nutrients. The present attempt deals with comparison antioxidant activities of various sprouts of selected pulses. The β-carotene, ascorbic acid, total antioxidant activity, total phenol and flavonoid content of black gram (Vigna mungo), cowpea (Vigna unguiculata), desi chickpea (Cicer arietinum), and yellow mustard (Brassica alba) seeds and their sprouts (48 h) were determined. The parameters selected reflect the antioxidant capacity with respect to the dietary antioxidants (β-carotene, ascorbic acid) which were noted to be highest in chickpea sprouts and black gram sprouts respectively. The highest antioxidant activity in terms of % DPPH inhibition (49.837 ± 0.61 % ) and flavonoid content ( 211.06 ± 8.17 mg/100g ) was observed in cowpea sprouts. The highest total phenol content was noted in yellow mustard sprouts (58.45 ±6.67 mg/100g). Inclusion of pulses in the diet is a healthy way to meet dietary recommendations and is associated with reduced risk of several chronic diseases including cancer. Long-term randomized controlled trials are needed to demonstrate the direct effects of pulses on the cancer like diseases.
Źródło:
World Scientific News; 2016, 35; 73-86
2392-2192
Pojawia się w:
World Scientific News
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Chemical Composition, Cytotoxic and Antioxidant Activities of Celosia trigyna L. Grown in Saudi Arabia
Autorzy:
El-Desouky, Samy
Abdelgawad, Ahmed
El-Hagrassi, Ali
Hawas, Usama
Kim, Young-Kyoon
Powiązania:
https://bibliotekanauki.pl/articles/895232.pdf
Data publikacji:
2019-08-30
Wydawca:
Polskie Towarzystwo Farmaceutyczne
Tematy:
GC-MS
antioxidant activity
cytotoxic activity
Celosia trigyna
flavonoid-glycosides
Opis:
The methanol extract of the aerial parts of Celosia trigyna (Amaranthaceae) was successively fractionated using n-hexane, dichloromethane, ethyl acetate and n-butanol. The cytotoxic activity of the obtained fractions was investigated using sulphorhodamine-B (SRB) assay against three carcinoma cell lines; breast adenocarcinoma (MCF-7), colorectal carcinoma (HCT-116) and hepatocellular carcinoma cells (HepG2). The dichloromethane fraction showed significant in vitro cytotoxic activities against the human cancer cell lines HCT-116 and HEP-G2 with IC50 values of 10.9 and 11.2 µg/mL, respectively, while all fractions revealed weak antioxidant activity using DPPH free radical scavenging method. The GC-MS analysis of the most cytotoxic dichloromethane fraction has resulted in the identification of 12 compounds. The main constituents were tetrahydroisoquinoline derivative (31.44%), 2,3-dimethylheptadecane (16.71%) and 3-octadecanone (15.56%). Moreover, the phytochemical study of the dichloromethane and n-butanol fractions led to the isolation and identification of five known compounds identified as β-amyrin acetate (1), acacetin 8-C-α-rhamnosyl-(1→2)-β-glucopyranoside (2), apigenin 8-C-α-rhamnosyl-(1→2)-β-glucopyranoside (3), quercetin 3-O-α-rhamnosyl-(1→6)-β-glucopyranoside (4) and 3-hydroxyglutaric acid (5).
Źródło:
Acta Poloniae Pharmaceutica - Drug Research; 2019, 76, 4; 691-699
0001-6837
2353-5288
Pojawia się w:
Acta Poloniae Pharmaceutica - Drug Research
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Studies on the antioxidant properties of extracts from the roots and shoots of two Scutellaria species in human blood plasma
Autorzy:
Grzegorczyk-Karolak, Izabela
Wysokińska, Halina
Olas, Beata
Powiązania:
https://bibliotekanauki.pl/articles/1039100.pdf
Data publikacji:
2015
Wydawca:
Polskie Towarzystwo Biochemiczne
Tematy:
antioxidant activity
flavonoid content
oxidative stress
Scutellaria alpina
Scutellaria altissima
Opis:
We determined the in vitro antioxidant activity of methanolic extracts from the shoots and roots of Scutellaria species (S. altissima and S. alpina) against the action of strong oxidants: hydrogen peroxide (H2O2) and H2O2+Fe2+ (donor of hydroxyl radicals) on plasma proteins and lipids. Lipid peroxidation in human plasma was measured by the level of thiobarbituric acid reactive species (TBARS). Protein oxidation was measured by quantitation of thiol group. We observed that the extracts (5-50 µg ml-1) containing phenolic compounds from both Scutellaria species distinctly reduced oxidation of lipids and proteins in human plasma treated with H2O2. These results also indicated that the extracts have a protective effect against oxidative damage to the human plasma lipids and proteins by induced hydroxyl radical. The main components of the plant materials analysed were flavonoids, present as aglycones (luteolin) or glycosides (cynaroside, baicalin, wogonoside). In all of the extracts, the phenylethanoid verbascoside was also found. The properties of the tested plant extracts were also compared with the action of a well characterised commercial antioxidative polyphenolic extract from the berries of Aronia melanocarpa (Aronox®). The comparative studies indicated that the analysed plant extracts were comparable to or even more effective in reducing the oxidation processes than the A. melanocarpa extract. The present study suggests that natural extracts from S. altissima and S. alpina have antioxidant activities and, therefore, may be beneficial in the prevention of diseases related to oxidant stress, such as cancer, cardiovascular, and inflammatory diseases.
Źródło:
Acta Biochimica Polonica; 2015, 62, 2; 253-258
0001-527X
Pojawia się w:
Acta Biochimica Polonica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Response of maize and black gram yield and water productivity to variations in canopy temperature and crop water stress index
Autorzy:
Khorsand, A.
Rezaverdinejad, V.
Asgarzadeh, H.
Heris, A.M.
Rahimi, A.
Besharat, S.
Powiązania:
https://bibliotekanauki.pl/articles/2082909.pdf
Data publikacji:
2020
Wydawca:
Polska Akademia Nauk. Instytut Agrofizyki PAN
Tematy:
canopy temperature
crop yield
CWSI
phenolic
and flavonoid compounds
water stress
Opis:
In order to evaluate the ability of the crop water stress index to estimate grain yield and water productivity of maize and black gram in the climatic conditions of Urmia (Iran), research was conducted under the conditions of single-row drip irrigation. This study was conducted in a randomized complete block design with four irrigation levels including 50 (I1), 75 (I2), 100 (I3) and 125 (I4) percent of the water requirements of the plants with three replications. The mean crop water stress index values for the I1, I2 and I3 treatments were 0.53, 0.44, and 0.28, respectively during the growth period of maize, and 0.37, 0.23, and 0.15 for black gram, respectively. In the present study, the correlation between the crop water stress index and the grain yield and also the water productivity of maize and black gram was high. According to the results, the highest grain yield for maize and black gram was obtained at crop water stress index values of 0.28 and 0.15, respectively. Therefore, these values are recommended for the irrigation scheduling of the plants. It should be noted that the maximum water productivity index for maize and black gram was obtained at crop water stress index values of 0.44 (I2) and 0.37 (I1), respectively, which are the values recommended for irrigation scheduling under restricted access to water.
Źródło:
International Agrophysics; 2020, 34, 3; 381-390
0236-8722
Pojawia się w:
International Agrophysics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Screening of phytochemical profile and antibacterial activity of various solvent extracts of marine algae Sargassum swartzii
Autorzy:
Sujatha, Ravi
Siva, Durairaj
Nawas, P. Mohideen Askar
Powiązania:
https://bibliotekanauki.pl/articles/1076470.pdf
Data publikacji:
2019
Wydawca:
Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:
Aeromonas hydrophila
Antibacterial activity
Pseudomonas aeruginosa
Sargassum swartzii
Total flavonoid
Total phenol
Opis:
The present study investigates phytochemical screening and antibacterial efficacy of various solvent extracts of marine algae such as Sargassum swartzii against some selected human and fish pathogenic bacteria. The brown seaweed Sargassum swartzii was collected from Kudankulam, Tirunelveli district, Tamil Nadu, India. Soxhlet extraction method was used to get the extracts of different solvents like aqueous, ethanol, methanol, acetone and were tested for their qualitative phytochemical screening using common standard tests. Quantitative phytochemical analysis such as total phenolic content and total flavonoid content of S. swartzii and antibacterial activity against human pathogens viz., Escherichia coli, Pseudomonas aeruginosa and Stephylococcus aureus and fish pathogens viz., Aeromonas hydrophila and Vibrio vulnificus bacteria using disc diffusion methods. Preliminary phytochemical screening of sixteen different chemical compounds were carried out. The maximum biochemical compounds were present in the ethanol extract and the minimum compounds were present in aqueous extract. The ethanol extract was significantly higher in phenolic content (15.35 ±2.61 mg of GAE/g) and the methanol extract was significantly higher in flavonoides content (26.92±7.14 mg of QE/g). In human pathogen the highest antibacterial activity was present in Pseudomonas aeruginosa (18.00±0.00mm) and the fish pathogen was significantly higher in Aeromonas hydrophila. The present study showed that the ethanol extract of marine brown seaweed Sargassum swartzii contains bio active constituents with highest antibacterial activity against human and fish pathogen.
Źródło:
World Scientific News; 2019, 115; 27-40
2392-2192
Pojawia się w:
World Scientific News
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Optical sensor of flavonoids based on liquid crystal
Optyczny czujnik flawonoidów bazujący na ciekłych kryształach
Autorzy:
Sushynskyi, Orest
Petrina, Romana
Gubriy, Zoriana
Khomyak, Semen
Mykytyuk, Zinoviy
Novikov, Volodymyr
Powiązania:
https://bibliotekanauki.pl/articles/408652.pdf
Data publikacji:
2019
Wydawca:
Politechnika Lubelska. Wydawnictwo Politechniki Lubelskiej
Tematy:
optical sensor
liquid crystal
flavonoid
quercetin
czujnik optyczny
ciekły kryształ
flawonoid
kwercetyna
Opis:
In order to solve the problems associated with the express registration of the presence of biologically active substances in callus biomass, we propose the use of cholesteric liquid crystal (CLC) with a spiral structure as a material of a sensitive element of optical sensor of flavonoids. Cholesteric liquid crystal BLO62 is proposed to use as a sensitive element. Spectral characteristics of alcohol solutions of flavonoids (20%, 40%, 70% and 90%) were obtained. The interaction of CLC with quercetin was analyzed. The scheme of the primary information signal converter is developed in which the current from the photodetector is transmitted to the developed signal converter. The device is implemented with the common use Atmega 328 microcontroller manufactured by Atmel. Speciality of this structural scheme is its flexibility and versatility, which makes it easy to reconfigure the parameters of the firmware for the registration of various types of investigated mediums.
Aby rozwiązać problemy związane z szybką analizą obecności substancji biologicznie czynnych w biomasie kalusa, proponujemy zastosowanie materiałów ciekłokrystalicznych o spiralnej strukturze supramolekularnej jako wrażliwego elementu czujnika optycznego flawonoidów. Proponuje się stosowanie cholesterycznego ciekłego kryształu BLO62 jako wrażliwego elementu. Uzyskano charakterystykę spektralną roztworów alkoholowych flawonoidów (20%, 40%, 70% i 90%). Przeanalizowano interakcję cholesterycznego ciekłego kryształu z kwercetyną. Opracowano schemat pierwotnego przetwornika sygnału, w którym prąd z fotodetektora jest przesyłany do opracowanego przetwornika sygnałów. Urządzenie jest realizowane na bazie mikrokontrolera Atmega32 Atmega 328. Cechą tego schematu strukturalnego jest jego elastyczność i wszechstronność, co ułatwia rekonfigurację parametrów oprogramowania do rejestracji różnych typów badanych substancji.
Źródło:
Informatyka, Automatyka, Pomiary w Gospodarce i Ochronie Środowiska; 2019, 9, 1; 61-64
2083-0157
2391-6761
Pojawia się w:
Informatyka, Automatyka, Pomiary w Gospodarce i Ochronie Środowiska
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Search for ecological methods to enlarge symbiotic nitrogen fixation efficiency by pea (Pisum sativum L.)
Poszukiwanie ekologicznych metod zwiększenia wydajności symbiotycznego wiązania azotu przez groch siewny (Pisum sativum L.)
Autorzy:
Podleśny, J.
Wielbo, J.
Podleśna, A.
Kidaj, D.
Perzyński, A.
Powiązania:
https://bibliotekanauki.pl/articles/336951.pdf
Data publikacji:
2015
Wydawca:
Sieć Badawcza Łukasiewicz - Przemysłowy Instytut Maszyn Rolniczych
Tematy:
pea
flavonoid preparation
seed dressing
nitrogenase
nodule
development of plant
groch siewny
preparat flawonoidowy
moczenie nasion
nitrogenazy
brodawki korzeniowe
rozwój roślin
Opis:
Conducted till now studies on symbiosis of papilionaceous plants and rhizobia discovered the genetic background of this phenomenon and allowed to identify numerous plant and bacteria metabolites involved in the process of starting of symbiosis and development of nodules. One of this compounds are flavonoids, recognised as signal particles participating in information exchange between a bacteria and a plant, affecting among others nodules formation on papilionaceous plants. These compounds are often submitted to processes which decrease their concentration on the way from a producer to a destined organism, they diffuse or break-up in the soil solution and are degraded by soil microorganisms. It can be then assumed that their insufficient amount is a cause of low efficient symbiosis, what considerably limits plant supply with nitrogen and decreases their yielding. An effect of use of flavonoid extract obtained from germinating seeds on ontogenesis, forming of physiological growth indexes and yielding of pea was evaluated in these studies. Application of a flavonoid preparation increased, among others, the number and weight of nodules and activity of nitrogenase, what in a consequence led to production of greater mass of vegetative and generative organs by pea plants.
Prowadzone dotychczas badania nad symbiozą roślin motylkowatych i rizobiów odkryły podłoże genetyczne tego zjawiska i pozwoliły na zidentyfikowanie licznych metabolitów roślinnych i bakteryjnych zaangażowanych w proces nawiązania symbiozy i rozwój brodawek korzeniowych. Jednym z takich związków sa flawonoidy, uznawane za cząstki sygnalne uczestniczące w wymianie informacji pomiędzy bakterią i rośliną, wpływające między innymi na powstawanie brodawek korzeniowych na roślinach motylkowatych. Związki te często podlegają procesom powodującym zmniejszenie ich stężenia na drodze od producenta do organizmu docelowego, dyfundują lub rozpadają się w roztworze glebowym oraz są degradowane przez mikroorganizmy glebowe. Można zatem przypuszczać, że niedostateczna ich ilość jest przyczyną mało wydajnej symbiozy, co znacznie ogranicza zaopatrzenie roślin w azot i zmniejsza ich plonowanie. W badaniach określano wpływ stosowania wyciągu flawonoidowego z kiełkujących nasion na ontogenezę, kształtowanie fizjologicznych wskaźników wzrostu oraz plonowanie grochu siewnego. Zastosowanie preparatu flawonoidowego zwiększyło między innymi liczbę i masę brodawek korzeniowych oraz aktywność nitrogenazy, co w konsekwencji prowadziło do wytwarzania większej masy organów wegetatywnych i generatywnych przez rośliny grochu siewnego.
Źródło:
Journal of Research and Applications in Agricultural Engineering; 2015, 60, 4; 67-70
1642-686X
2719-423X
Pojawia się w:
Journal of Research and Applications in Agricultural Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Application of green-extraction technique to evaluate of antioxidative capacity of wild population of fireweed (Epilobium angustifolium)
Autorzy:
Nowak, A.
Klimowicz, A.
Duchnik, W.
Kucharski, Ł.
Florkowska, K.
Muzykiewicz, A.
Wira, D.
Zielonka-Brzezicka, J.
Siedłowska, A.
Nadarzewska, K.
Powiązania:
https://bibliotekanauki.pl/articles/2048950.pdf
Data publikacji:
2019
Wydawca:
Instytut Włókien Naturalnych i Roślin Zielarskich
Tematy:
Epilobium angustifolium
antioxidant activity
total polyphenol content
green-extraction technique
total flavonoid content
aktywność antyoksydacyjna
ogólna zawartość polifenoli
ogólna zawartość flawonoidów
zielona metoda ekstrakcji
Opis:
Introduction: Fireweed (Epilobium angustifolium (L.) Holub) is a common weed growing on meadows, roadside and agricultural wasteland, creating vast, rapidly spreading fields. Objective: The aim of the study was to evaluate the antioxidant activity of extracts from fresh fireweed, harvested at three ripening stages. Methods: Analysis of antioxidative activity was carried out by DPPH, ABTS and FRAP methods. Total polyphenol and total flavonoid content were also determined. Plant material was extracted using ultrasound-assisted green extraction technique with methanol, ethanol and isopropanol at different concentrations and water. Results: The highest antioxidant activity evaluated by DPPH, ABTS and FRAP was found for the extracts prepared in 70% ethanol. The highest content of total polyphenols were observed in extracts in 70% ethanol, whereas the highest content of flavonoids extracts in undiluted methanol. Conclusion: Epilobium angustifolium harvested at fruit ripening stage seems to be a valuable source of antioxidants.
Źródło:
Herba Polonica; 2019, 65, 4; 18-30
0018-0599
Pojawia się w:
Herba Polonica
Dostawca treści:
Biblioteka Nauki
Artykuł
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