Wyniki wyszukiwania - Biblioteka Nauki

1

Ellagic acid in in vitro cultures of Rubus chamaemorus L.

100%

Thiem B. , Krawczyk A.

Herba Polonica

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2003

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tom 49

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nr 3-4

EN

This paper describes analysis of free and total (also liberated by hydrolysis) ellagic acid (EA) content in in vitro cultured Rubus chamaemorus and in leaves of intact plants as a control. The content of EA was determined by high performance liquid chromatography (HPLC). The analysis revealed that the content of free EA in the shoot cultures was only 2.6 X less than in intact leaves and that callus tissue is also able to synthetize small amounts of EA.

PL

W pracy opisano analizę zawartości wolnego i całkowitego (również uwolnionego po hydrolizie) kwasu elagowego w kulturach in vitro Rubus chamaemorus i kontrolnych liściach roślin ze stanu naturalnego. Zawartość kwasu oznaczano metodą wysokosprawnej chromatografii cieczowej (HPLC). Analizy wykazały, że ilość wolnego kwasu elagowego w kulturach pędów in vitro jest 2,6 razy mniejsza niż w liściach. W tkance kalusowej również zachodzi biosynteza śladowych ilości kwasu elagowego.

2

The inhibitory effect of ellagic acid on genotoxicity and mutagenicity induced by different doses of benzo[a]pyrene

100%

Gorski T. , Gorecka D. , Sikora M.

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nr 1

EN

Ellagic acid (EA), known as a naturally occurring plant phenol, has shown a significant influence on genotoxicity and mutagenicity induced by benzo(a)pyrene (B(a)P) in experiments with sister chromatid exchange (SCE) and Ames Salmonella typhimurium revertants. The maximum inhibitory effect of EA has been detected at low levels of B(a)P doses administered intraperitoneal to mice. The frequency of SCE per chromosome in bone marrow cells induced by B(a)P has been greatly lowered by EA at lower B(a)P doses than 0.5 mg/kg body weight of animals. The number of Ames typhimurium revertants has been reduced in the highest degree at about 10 μg of B(a)P per plate.

3

Quantitative determination of ellagic acid and gallic acid in Geum rivale L. and G. urbanum L.

86%

Owczarek A. , Olszewska M. A. , Gudej J.

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nr 2

4

Ellagic acid content in fruits of selected strawberry cultivars

86%

Bojarska J. E. , Zadernowski R. , Czaplicki S.

Polish Journal of Natural Sciences

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2011

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tom 26

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nr 2

EN

Ellagic acid is a biologically active compound, regarded as preventive against various diseases and demonstrates anticarcinogenic and antioxidant effects. In Poland, one of the five largest strawberry producers, the supply of these fruits is significant; therefore exploration of this subject and dissemination of the knowledge concerning their nutritional values and health-related properties is important. The aim of the study was to determine the content of ellagic acid in the most popular, selected strawberry cultivars in Poland. Fruits of the strawberry cultivars under examination differed significantly in ellagic acid content. The content of the analysed component ranged from 452.5 mg kg⁻¹ fresh weight (4,575.6 mg kg⁻¹ dry matter) in fruits of the ‘Heros’ cultivar to 1,193.8 mg kg⁻¹ fresh weight (14,215.0 mg kg⁻¹ d.m.) in fruits of the ‘Camarosa’ cultivar. The highly diversified content of ellagic acid in fruits of individual cultivars, grown in similar soil and weather conditions and subjected to the same agricultural treatments, indicates that the content of the analysed phenolic acid depends not only on the fruit species, but also on the cultivar.

PL

Kwas elagowy jest związkiem biologicznie aktywnym, uznanym za prewencyjny dla wielu chorób, wykazującym m.in. działanie antykancerogenne i antyoksydacyjne. W Polsce, należącej do pięciu największych producentów truskawek na świecie, podaż tych owoców jest znaczna, istotne jest więc zgłębianie i propagowanie wiedzy dotyczącej ich wartości odżywczych czy prozdrowotnych. Celem pracy było określenie zawartości kwasu elagowego w wybranych najpospolitszych w kraju odmianach truskawek. Owoce badanych odmian truskawek różniły się istotnie pod względem zawartości kwasu elagowego. Zawartość badanego składnika wynosiła od 452,5 mg kg⁻¹ św.m. (4575,6 mg kg⁻¹ s.m.), w owocach odmiany ‘Heros’ do 1193,8 mg kg⁻¹ św.m. (14215,0 mg kg⁻¹ s.m.), w owocach odmiany ‘Camarosa’. Wysoce zróżnicowane zawartości kwasu elagowego w owocach poszczególnych odmian, uprawianych w zbliżonych warunkach glebowo-klimatycznych i poddanych tym samym zabiegom agrotechnicznym, pozwalają domniemywać, iż zawartość badanego kwasu fenolowego jest zależna nie tylko od gatunku owoców, ale również od odmiany.

5

Analysis of gallic acid and ellagic acid in leaves of Elaeagnus angustifolia L. from different habitats and times in Xinjiang by HPLC with cluster analysis

86%

Sun Y. , Liu J. , Bayertai , Tang S. , Zhou X.

Acta Chromatographica

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2021

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tom Vol. 33, no. 2

195--201

EN

Objective: To determine the levels of gallic acid and ellagic acid by using high-performance liquid chromatography (HPLC) with R software hierarchical cluster analysisin Elaeagnus angustifolia L. gathered from different locations in Xinjiang. Methods: A chromatographic column Diamonsil C18 with a size of 4.63250 mm and 5 mm was used with methanol as A and 0.1% phosphoric acid aqueous solution as B as the mobile phase. The flow rate was 1 mL/min for the gradient elution and the injection volume was 5 mL. HPLC was performed with a detection wavelength of 260 nm and chromatographic column of 35 8C. In addition, R software hierarchical clustering method was used for studying the levels of gallic acid and ellagic acid in E. angustifolia L. from 10 areas. Results: Gallic acid and ellagic acid showed a good linear relationship between 7.375 and 236 mg/mL with a correlation coefficient of 0.9999, and between 3.625 and 116 mg/mL with a correlation coefficient of 0.9999 respectively. The average recovery values were 103.98 and 101.57%, and the Relative Standard Deviation (RSD) values were 1.92 and 1.47%. Conclusion: Differences in the levels of gallic acid and ellagic acid in E. angustifolia L. leaves from different areas in Xinjiang showed that both were the highest in Kuitun.

6

Ellagic acid content in selected wild species of fruit roses

72%

Karczmarz K. , Szmagara A. , Stefaniak E. A.

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2019

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tom 18

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nr 5

EN

Ellagic acid (EA) is a natural antioxidant, belonging to the group of polyphenolic compounds. It displays a broad spectrum of pro-health effects, ranging from the prevention of cancer to antiviral properties. It is present in many fruit from the rose family (Rosaceae): strawberries, raspberries, blackberries and walnuts as well as cranberries and grapes. The available literature states that the fruit of roses, in addition to their aesthetic and functional applications, also show therapeutic properties, which, among other things, are associated with a high content of polyphenols, including ellagic acid derivatives. The aim of this research was to determine the differences in the content of free ellagic acid in the fruit of selected rose species. The test material consisted of freeze-dried sublimation and ground fruit from the following species of roses: R. canina, R. moyesii, R. pendulina. The fruit was separated into two fractions: flesh and seeds. Quantitative analysis of free ellagic acid was carried out by spectrofluorimetry. The free EA was present both in the flesh and in the seeds of the studied species of roses. Its content in the mentioned fractions varied depending on the species. The flesh of R. pendulina was characterised by the highest level of EA in free form (247.72 μg·g–1 of dry weight). The seeds of R. moyesii proved to be the most abundant in free EA (105.69 μg·g–1 of dry weight).

7

High performance liquid chromatography of ellagic acid from the leaves of Rubus chamaemorus L

72%

Krawczyk A. , Thiem B. , Szkudlarek M.

Chemia Analityczna

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2003

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tom Vol. 48, No. 6

891-899

EN

Ellagic acid (EA) is an important compound of dietary food as an antioxidant and it has been reported to have beneficial effects on human health. Optimisation of sample preparation procedures and experimental conditions for the fast and simple determination of the free and the total EA content in cloudberry's (Rubus chamaemorus L.) leaves by means of high-performance liquid chromatography (HPLC) have been developed. For the first time the mixture of vitamin C and 5-tocopherol has been used to protect EA from the influence of oxygen and light and this combination of the two agents provided the best effect in comparison to other known antioxidants. The influence of time and temperature on EA yield in the hydrolysed sample has been also analysed. The HPLC conditions applied resulted in a satisfactory separation of EA standard solution as well as the studied sample. One determined high concentration of the free and the total EA amount in dried leaves of R. chamaemorus, 0.137 and 6.996 g on 100 g of dry mass.

PL

Kwas elagowy (KE) jest ważnym składnikiem zdrowej żywności ze względu na jego korzystne działanie jako przeciwutleniacza na zdrowie człowieka. W pracy opisano zoptymalizowaną procedurą przygotowywania próbek oraz niektórych analitycznych warunków stosowanych w wysokosprawnej chromatografii cieczowej (HPLC) do szybkiego i prostego oznaczania wolnego i całkowitego KE w liściach maliny moroszki (Rubus chamaemorus L.). Z szeregu wybranych przeciwutleniaczy zastosowanych do ochrony KE przed działaniem światła i tlenu, mieszanina witaminy C i 5-tokoferolu, użyta po raz pierwszy, dała najlepszy efekt. Badano również wpływ czasu i temperatury na wydajność KE w hy-drolizowanych próbkach. Opisane w pracy warunki HPLC pozwoliły na dobre rozdzielenie składników standardowego roztworu KE, jak również badanych próbek. Oznaczono wysoką zawartość wolnego i całkowitego KE w liściach R. chamaemorus, odpowiednio 0.137 i 6.996 g na lOOg suchej masy.

8

Ellagic acid protects against diabetic cardiomyopathy in rats by stimulating cardiac silent information regulator 1 signaling

72%

Altamimi J. Z. , Alfaris N. A. , Alshammari G. M. , Alagal R. I. , Aljabryn D. H. , Aldera H. , Alkhateeb M. A. , Yahya M. M.

Journal of Physiology and Pharmacology

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2020

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tom 71

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nr 6

9

Link between profiles of bioactive compounds present in strawberry fruits and leaves

72%

Horszwald A. , Carlen C. , Andlauer W.

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tom 61

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nr Suppl.1

10

Effect of tytanit and Biochikol 020 PC on phenolics composition of red raspberry (Rubus idaeus L.) cv. 'Polka' fruit

58%

Ochmian I. , Skupien K. , Grajkowski J.

Folia Universitatis Agriculturae Stetinensis. Agricultura, Alimentaria, Piscaria et Zootechnica

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2008

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tom 06

11

Comparison of field performance, fruit firmness, and nutritional value of yellow- and red-fruit Polish raspberry cultivars

58%

Ochmian I. , Skupien K.

Electronic Journal of Polish Agricultural Universities. Series: Horticulture

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2008

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tom 11

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nr 4

12

Rubus chamaemorus L. - a boreal plant rich in biologically active metabolites: a review

58%

Thiem B.

Biological Letters

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2003

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tom 40

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nr 1

13

Wartość biologiczna owoców truskawki uzyskanych w różnych systemach uprawy

36%

Krol K. , Swiderski A.

Zeszyty Problemowe Postępów Nauk Rolniczych

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2009

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tom 539

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nr 1

PL

Owoce odmiany ‘Elsanta’ z uprawy w substracie torfowym, w tunelu ogrzewanym i nieogrzewanym oraz w gruncie (kontrola) poddano analizom chemicznym. Badania wykonano w dwóch latach owocowania, w trzech cyklach uprawowych. W obu owocowaniach owoce z kontroli zawierały najwięcej ekstraktu (odpowiednio 9,34 i 9,26 Brix). W pierwszym owocowaniu kwasowość była najwyższa dla owoców z kontroli (1,07 g∙100 g-1 św.m.), a najniższa dla owoców z tunelu nieogrzewanego (0,80 g∙100 g-1 św.m.). W drugim roku plonowania nie było różnic w kwasowości owoców z tunelu nieogrzewanego i kontroli (odpowiednio 0,80 g∙100 g-1 św.m. i 0,81 g∙100 g-1 św.m.), a owoce z tunelu ogrzewanego miały wyższą kwasowość (0,88 g∙100 g-1 św.m.). Zawartość kwasu askorbinowego w obu latach owocowania była niższa dla owoców z kontroli (odpowiednio 68,90 i 60,10 mg∙100 g-1 św.m.). W pierwszym owocowaniu najwięcej kwasu askorbinowego zawierały owoce z tunelu ogrzewanego (78,08 mg∙100 g-1), a w drugim owocowaniu owoce z tunelu nieogrzewanego (76,93 mg∙100 g-1). Zawartość antocyjanów w pierwszym plonowaniu była największa dla owoców z tunelu nieogrzewanego (21,14 mg∙100 g-1), a w drugim owocowaniu dla owoców z tunelu ogrzewanego (18,62 mg∙100 g-1). Zawartość kwasu elagowego w pierwszym jak i drugim owocowaniu była najwyższa dla roślin z tunelu nieogrzewanego (odpowiednio 8,59 i 10,44 mg∙100 g-1).

EN

Strawberry fruits of ‘Elsanta’ cv. from cultivation on the peat substrate, in heated and unheated tunnels and in the soil (control), were tested for chemical composition. Investigations were conducted over two years of fruiting, in three series of cultivation. In both years the fruits cultivated in soil (control) contained the highest extract level (9.34 and 9.26 Brix, respectively). In the first year the fruits from soil cultivation showed the highest acidity (1.07 g∙100 g-1 FM) while the lowest - the fruits from unheated tunnel (0.80 g∙100 g-1 FM). No differences in acidity were found in second year for fruits from unheated tunnel and soil cultivation 0.80 g∙100 g-1 FM and 0.81 g∙100 g-1 FM, respectively), whereas the acidity of fruits from heated tunnel was higher (0.88 g∙100 g-1 FM). Ascorbic acid content in both fruiting years was lower for fruits from soil (respectively 68.90 and 60.10 mg∙100 g-1 FM). In the first year the highest level of ascorbic acid was found in fruits from heated tunnel (78.08 mg∙100 g-1) while in the second year for fruits from unheated tunnel (76.93 mg∙100 g-1). The highest anthocyanin content in first year was in unheated tunnel fruits (21.14 mg∙100 g-1) and in the second year for heated tunnel fruits (18.62 mg∙100 g-1). Elagic acid content in first and second years was the highest for unheated tunnel fruits (respectively 8.59 and 10.44 mg∙100 g-1 FM).