Wyniki wyszukiwania - AGRO

1

Content of phenolic, extractable and bound condensed tannins and their effect on in vitro gas production from browse leaves

100%

Rubanza C. D. K., Shem M. N., Otsyina R., Bakengesa S. S., Ichinohe T., Fujihara T.

Journal of Animal and Feed Sciences

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2005

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tom 14

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nr 1

2

Nanofiltration of cork wastewaters and their possible use in leather industry as tanning agents

86%

Geraldes V., Minhalma M., De P. M. N., Anil A., Ozgunay H., Bitlisli B. O., Sari O.

Polish Journal of Environmental Studies

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2009

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tom 18

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nr 3

353-357

Cork processing wastewater is a very complex mixture of vegetal extracts and has, among other natural compounds, a very high content of phenolic/tannic colloidal matter that is responsible for severe environmental problems. In the present work, the concentration of this wastewater by nanofiltration was investigated with the aim of producing a cork tannin concentrate to be utilized in tanning. Permeation results showed that the permeate fluxes are controlled by both osmotic pressure and fouling/gel layer phenomena, leading to a rapid decrease of permeate fluxes with the concentration factor. The rejection coefficients to organic matter were higher than 95%, indicating that nanofiltration has a very good ability to concentrate the tannins and produce a permeate stream depleted from organic matter. The cork tannin concentrate obtained by nanofiltration and evaporation had total solids concentration of 34.8 g/l. The skins tanned by this concentrate were effectively converted to leather with a shrinking temperature of 71℃ .

3

Winter diet variation and overlap of sympatric red deer and sika deer in Northeast China

72%

Zhong L., Zhang W., Yang M., Wu S., Zhi X., Zhang M.

Polish Journal of Ecology

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2019

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tom 67

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nr 4

4

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Phytochemical variability of coltsfoot (Tussilago farfara L.) in Poland

72%

Adamczak A., Buchwald W., Gryszczynska A.

Herba Polonica

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2012

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tom 58

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nr 4

Coltsfoot leaves are a traditional raw material, rich in polysaccharides and phenolics. The variability of the contents of these main compounds was determined, using plant material originated from 22 natural populations of Tussilago farfara L. growing in various regions of Poland. In the years 2008–2009, plants from each investigated population were collected in the Garden of Medicinal Plants in Plewiska near Poznań (Poland). Coltsfoot leaves were harvested in the middle of June and July of 2010, and then dried at room temperature. In these raw material we quantified swelling index (describing mucilage content) and spectrophotometrically: the amounts of total polyphenols, polyphenols unadsorbed on hide powder (non-tannin phenolics) and tannins (expressed as pyrogallol equivalent) as well as the sum of hydroxycinnamic acid derivatives (expressed as rosmarinic acid) and flavonoids (expressed as quercetin). The demonstrated results show the relatively high and balanced contents of the basic active compounds, especially flavonoids (0.7–1.3%) and polysaccharides (swelling index: 8.0–14.5). In addition, it was found that flavonoids and mucilage in coltsfoot leaves fluctuate in only a small range (V=11–13%), regardless of overshadow and the harvest time of raw material.

5

Widma absorpcyjne produktow reakcji waniliny z taninami z nasion roslin straczkowych

72%

Karamac M., Amarowicz R.

Bromatologia i Chemia Toksykologiczna

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2002

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tom 35

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nr 3

297-299

6

TEM investigation of tannins and chloroplast structure in needles of damaged silver fir trees [Abies alba Mill.]

72%

Bacic T., Ljubesic N., Uzarevic Z., Grgic L., Rosa J.

Acta Biologica Cracoviensia. Series Botanica

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2004

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tom 46

145-149

As part of investigations on the effect of air pollution on plant anatomy, we examined the condition of tannins and chloroplast structure in damaged fir trees (Abies alba Mill.) at Risnjak National Park. Two populations were chosen for needles sampling: one at the Risnjak site with trees having 20%, 45% and 85% damage, and the other at the Donja Dobra site (control locality) with relatively healthy trees having 5% to 10% damage. Current and previous-year needles were fixed with glutaraldehyde and osmium tetroxide, and then the condition or ultrastructure of tannins and chloroplasts were examined by transmission electron microscopy (TEM). The tannins were shown to be granular and arranged in thin or thick ribbons. The chloroplasts were first somewhat rounded and then round or irregular in shape, with reduced and swollen thylakoids, especially those of the grana, increased numbers of plastoglobuli, large lipid droplets/accumulations, and vesiculation of the cytoplasm. These symptoms were more frequent in previous-year than in current-year needles. All these alterations can be attributed to air pollution.

7

Meat quality in pigs fed mixtures with low-tannin faba bean

72%

Milczarek A., Osek M.

Annals of Warsaw University of Life Sciences - SGGW. Animal Science

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2017

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tom 56[1]

Meat quality in pigs fed mixtures with low-tannin faba bean. The aim of the study was to evaluate slaughter values of carcasses and meat (M. longissimus lumborum, M. semimembranosus) quality in pigs fed mixtures with faba beans. Research included 48 fatteners, which were divided into three feeding groups. Pigs in group I were fed mixtures in which extracted soybean meal was used as the only high-protein raw material, whereas animals in groups II and III were fed mixtures with 5/10% or 10/20% of low-tannin faba bean in grower/ finisher mixtures respectively. It was proved, that introduction of faba bean into mixtures increased of meatiness and loin “eye” area and decreased of carcass fatness. The significant increase in the share of the most valuable exogenous fatty acids (C18:2n-6, C18:3n-3) in muscles II and III groupswere found. The M. longissimus lumborum in pigs fed mixtures with faba beans were characterized by significantly better water holding capacity WHC (P ≤0.01).

8

Antiradical properties of extracts from roots, leaves and fruits of six Rumex L. species

72%

Wegiera M., Grabarczyk P., Baraniak B., Smolarz H. D.

Acta Biologica Cracoviensia. Series Botanica

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2011

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tom 53

|

nr 1

We used the DPPH method to assess in vitro the antiradical activity of extracts from the roots, leaves and fruits of six Rumex L. (dock) species. Data from preliminary screening indicated that all the tested extracts showed antioxidant properties. The degree of antiradical activity depended upon the plant part. Fruit extracts from R. hydrolapathum Huds., R. obtusifolius L. and R. confertus Willd. showed stronger antiradical properties than the other tested material. We also determined tannin content levels in the extracts and their correlation with antioxidant activity.

9

Phenolic constituents of fireweed (Epilobium angustifolium L.) herb

72%

El-Ansari M. A., Weglarz Z., Ali Kawashty S., Skiba A.

Annals of Warsaw Agricultural University. Horticulture (Landscape Architecture)

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2002

|

tom 23

10

Tissue localization of the condensed tannins in the leaves of the black cherry, Prunus serotina Ehrh.

72%

Halarewicz A.

Electronic Journal of Polish Agricultural Universities. Series Biology

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2011

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tom 14

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nr 4

11

Antioxidant properties of acetone extracts from selected fresh and dried spices

72%

Druzynska B., Wojda M.

Polish Journal of Food and Nutrition Sciences

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2007

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tom 57

|

nr 2[A]

47-51

The purpose of the study was to determine antioxidant properties of acetone extracts from selected fresh and dried spices. Three spices have been examined: garlic, oregano and rosemary. Preparations were obtained by the extraction of polyphenols with a 70% acetone solution. The contents of total polyphenols and total catechin were determined in the study. The ability of total polyphenols contained in the obtained extracts to chelate Fe(II) ions was examined, too. The antioxidant properties of the examined extracts were assayed with three methods: against stable, synthetic DPPH radicals, cation-radicals ABTS and against hydroxyl radicals. On the basis of findings it turned out that condensed tannins are a dominant group of polyphenols in oregano, rosemary and fresh garlic. Granular garlic contained a higher level of catechins than tannins. All preparations of fresh spices dispalyed the ability to chelate iron ions. All extracts had antioxidant properties against synthetic radicals, with the exception of garlic preparation which did not inhibit hydroxyl radicals. Extracts of fresh spices demonstrated better antioxidant properties.

12

Wodoodporne tworzywa drzewne zaklejane zywicami garbnikowymi

72%

W O.

Biuletyn Informacyjny Ośrodka Badawczo-Rozwojowego Przemysłu Płyt Drewnopochodnych w Czarnej Wodzie

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2006

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tom 46

|

nr 1-2

81-84

13

Antioxidant activity of extract of shea nut meal and its fractions

72%

Janiak M., Penkacik K., Urbalewicz A., Amarowicz R.

Polish Journal of Food and Nutrition Sciences

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2011

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tom 61

|

nr Suppl.1

14

Morphological and chemical variability within the population of common avens (Geum urbanum L.)

72%

Kuczerenko A., Krawczyk M., Przybyl J. L., Geszprych A., Angielczyk M., Baczek K., Weglarz Z.

Herba Polonica

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2011

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tom 57

|

nr 2

The aim of the study was an ex situ evaluation of morphological and chemical variability within the population of common avens. Plant height, number of shoots, stage of generative development (number of flower buds, flowers, and fruits), as well as weight of herb and underground organs were determined. In the raw materials total content of tannins and content of particular phenolic compounds identified by HPLC was determined. In underground organs also content of eugenol – the dominant constituent of essential oil was assessed. High diversity of morphological traits (especially weight of herb and underground organs) and the content of determined compounds (especially in herb) was found. Above- and underground organs differed in the composition and content of phenolic compounds. Underground organs were characterised by higher content of flavan-3-ols, but they did not contain chlorogenic acid, which was the dominant phenolic compound in herb.

15

Dynamics of phenolic compounds in leaves of Fragaria ananassa Duch. after treatment with different forms of chitosan

72%

Subin O. V., Likhanov A. F., Sereda O. V., Klyuvadenko A. A., Melnychuk M. D.

BioTechnologia. Journal of Biotechnology Computational Biology and Bionanotechnology

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2020

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tom 101

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nr 3

16

Quebracho tannin-hyperbranched polyglycerol blends as adhesives for wood bonding

72%

Andruszkiewicz M., Maminski M.

Annals of Warsaw University of Life Sciences - SGGW. Forestry and Wood Technology

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2012

|

tom 77

Quebracho tannin - hyperbranched polyglycerol blends as adhesives for wood bonding. Applicability of tannin-hyperbranched polyglycerol blends cured with hexamine in wood bonding was investigated. Adhesive performance of the systems was examined. It was shown that strengths of adhesive joints exceeded that of the substrate, therefore it was concluded that hyperbranched polyglycerols might be effective components of tannic adhesives.

17

Intraruminal administration of two doses of quebracho tannins to sheep: effect on rumen degradation and total tract digestibility, faecal recovery and toxicity

72%

Hervas G., Frutos P., Ramos G., Giraldez F. J., Mantecon A. R.

Journal of Animal and Feed Sciences

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2004

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tom 13

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nr 1

18

Antioxidant properties of different fruit seeds and peels

72%

Duda-Chodak A., Tarko T.

Acta Scientiarum Polonorum. Technologia Alimentaria

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2007

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tom 06

|

nr 3

The objective of the investigations performed was to assess the antioxidant properties of the seeds and peels of selected fruits. The antioxidant activity as well as total polyphenol and tannin content were determined. The results obtained revealed essential diversities of the analysed parameters among the material examined. The peels were characterized by higher ability to scavenge free radicals and higher polyphenols concentration than the seeds, particularly those of citrus fruits imported to Poland. The highest antioxidant activity was observed in the peels of the Šampion cultivar of apples and white grapes, and in the seeds of the Idared cultivar apples and oranges. Tannins play a meaningful role as antioxidants in grape, apple and goosberry fruits. The peels and seeds of various fruits, which are waste products in fruit and vegetable industry, may be a potential source of antioxidants

19

Content of phenolics and tannins in leaves and pods of some Acacia and Dichrostachys species and effects on in vitro digestibility

72%

Rubanza C. D. K., Shem M. N., Otsyina R., Nishino N., Ichinohe T., Fujihara T.

Journal of Animal and Feed Sciences

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2003

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tom 12

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nr 3

20

Sterols in the herb and rhizomes from Comarum palustre L.

72%

Sokolowska-Wozniak A., Krzaczek T., Bialopiotrowicz L., Gawdzik J., Mardarowicz M.

Herba Polonica

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2002

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tom 48

|

nr 4

The fraction of sterols acetates from the herb and rhizomes from C. palustre have been isolated in the typical way from petroleum ether extract. By means of the weight method the total amounts of sterols was determined in herb (0.1192%), in rhizomes (0.0517%). The mixture of sterols acetates was investigated by capillary gas chromatography GC MS techniques. Stigmasterol, β-sitosterol, campesterol and ergosterol were identified in both fractions. Stigmasterol and β-sitosterol were the predominant sterol components in analysed raw materials from C. palustre.

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