Wyniki wyszukiwania - AGRO

1

Studies of trace element content in selected medical herbs

100%

Mezyk Z., Wiackowski S. K.

Polish Journal of Environmental Studies

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1999

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tom 08

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nr 2

2

The diversified content of heavy metals in the landscape catenae of the ground moraine in the Mazurian Lakeland

100%

Smolczynski S., Sowinski P., Orzechowski M.

Polish Journal of Soil Science

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2004

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tom 37

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nr 2

The research was conducted on two catenae representing a hilly ground moraine landscape, diversified in terms of size, slope and exploitation, located in the Mazurian Lakeland. Total content of Mn, Zn, Cu, Cd, Pb, Ni, Cr was determined in the soils of the catenae examined. The increase in the content of the heavy metals determined was found in the direction of the central part of the depression. The research indicated that hydrogenic soils of depressions within moraines were the location for the accumulation of heavy metals in the young glacial landscape. No soils were found to have been polluted with heavy metals. Only cadmium exceeded the threshold of its natural content (1 mg kg-1).

3

The content of some antinutritional factors in new varieties of faba bean and pea seeds

100%

Kasprowicz M., Frankiewicz A.

Polish Journal of Natural Sciences

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2003

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tom 14

4

The effect of the content of organic carbon in the soil on the chemical composition of the soil solution

100%

Rutkowska B., Szulc W., Labetowicz J.

Polish Journal of Soil Science

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2004

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tom 37

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nr 2

On the basis of 136 soil samples collected from an area of Poland, the effect of the content of organic carbon in the soil on the chemical composition of soil solution was analyzed. With an increase of organic carbon content in the soil, a significant increase of calcium and to a lesser extent of magnesium, bicarbonates and phosphates in the soil solution was observed. No correlation was noted between the organic carbon soil content and the concentration of aluminium in the soil solution. The contents of organic matter in the soil influenced the concentrations of microelements in the soil solution more than the macroelements content in this soil. The concentrations of manganese, iron, zinc and copper were positively correlated, the concentration of molybdenum was negatively correlated and the concentration of boron did not show any relationship with the soils content of organic carbon.

5

Changes in iron(II) and iron(III) content in a solution of humic acids during coagulation by means of monomeric iron(III) salts

86%

Libecki B., Dziejowski J.

Polish Journal of Environmental Studies

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2010

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tom 19

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nr 5

This study discusses the results of laboratory analyses investigating the chemical coagulation of a model of humic acid solution with the use of monomeric iron(III) salts – chloride and sulfate – in a standard coagulation test environment. The objective of the study was to determine changes in iron compound concentrations in the tested solution as a result of coagulation. The following parameters were analyzed in solution samples: changes in COD, colour, turbidity, suspended solids, pH, and streaming potential in relation to the applied coagulant dose. The content of total iron (Fetotal) and iron(II) was determined in solution samples after coagulation. The lowest Fetotal concentrations were observed following the use of optimal coagulant doses, and higher doses led to a repeated increase in total iron levels. In purified solution samples, iron(III) was partially reduced to iron(II) with an 8-42% share of Fetotal, depending on salt type and the applied dose.

6

Macro- and microelements content in the sward depending on soil chemical composition

86%

Czyz H., Niedzwiecki E., Trzaskos M., Protasowicki M.

Folia Universitatis Agriculturae Stetinensis. Agricultura

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1999

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tom 80

7

The impact of different fertilization and cropping systems on soil organic matter [SOM] content and quality in Lithuania

86%

Slepetiene A., Buciene A., Huttmann S., Beyer L., Pingpank K.

Zeszyty Naukowe Akademii Rolniczej w Krakowie. Sesja Naukowa

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2001

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tom 77

8

The content and composition of essential oils and fatty acids obtained from the fruits of angelica [Archangelica officinalis Hoffm.]

86%

Wolski T., Najda A., Ludwiczuk A.

Herba Polonica

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2003

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tom 49

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nr 3-4

The aim of this work was the analysis of essential oil from fruits of Archangelica officinalis received from Central Station of Seed Production in Bydgoszcz, and essential oil compounds occurring in fruits extracts. Essential oil was obtained as a result of steam water distillation and solvent extraction was done with hexane and methylene chloride. Analysis of essential oil compounds was done by using GC/MS method. The major components of essential oil are monocyclic terpenes (a- and ß-phellandrene, a-pinene and p-cymene) and sesquiterpenes (a-humulene, germacrene D, a-zingiberene, ß-farnezene). The most important compound of extracts from angelica fruits is ß-phellandrene. The percentage content of ß-phellandrene in essential oil fraction occurring in hexane extract was 64.3%, and in methylene chloride extract 38.0%. The aim of this work was also chromatographic analysis of fatty acids. GC analysis showed, that the major compound was oleic acid (18:1).

9

Content and localisation of heavy metals in thalli of hemerophilous lichens

86%

Baranowska-Bosiacka I., Pienkowski P., Bosiacka B.

Polish Journal of Environmental Studies

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2001

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tom 10

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nr 4

For the purpose of this work an epiphytic lichen species, Hypogymnia physodes (L.)Nyl., was used. Thalli of the lichen were treated with solutions of nitrate salts of heavy metals, including Zn(NO3)(2), Cu(NO3)(2), Pb(NO3)(2), and Cd(NO3)(2). To simulate the acid rain impact, pH of the metal mixture was lowered to pH 4, using Na2S2O5. Content of heavy metals was determined after a standard UV mineralization method (water solution) and burning method (in temperature 450 degreesC- thalli), using a Microcomputer Voltage-ammeter Analyser (MAW). After two months exposure of the lichen to the mixture of heavy metal nitrates it was ascertained that there was an increase of accumulation of Zn, Pb, Cu, and Cd in the thalli; a decrease of thalli pH caused increased uptake of toxic elements by the lichen; Pb and Cd remained mainly on the surface of the thalli and in the cell walls, whilst Zn and Cu penetrated to the protoplast.

10

Qualitative analysis and estimation of content of phenolic acids from fruit of Hacquetia epipactis [Scop] DC. by chromatographic methods

86%

Bartnik M., Stolarczyk A., Glowniak P., Burczyk J., Glowniak K.

Herba Polonica

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2003

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tom 49

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nr 3-4

Hacquetia epipactis (Scop.) DC. (Umbelliferae) is the only species of the genus Hacquetia growing mainly in Poland. In presented work extracts from fruits of this plant were investigated on the presence of phenolic acids. Free phenolic acid fractions and fractions obtained from the acid and alkaline hydrolyses were analysed by 2D TLC on cellulose layers. Chromatograms were observed in UV light (366 nm) before and after treatment with ammonia vapour and in daylight after derivatisation with 3% FeCI3 or diazotized sulphanilic acid. RP-HPLC analysis was performed using mobile phase methanol-water (20:80) with 1% acetic acid (v/v). Before HPLC samples had been purified using SPE method. The contents of phenolic acids in extract from fruits of Hacquetia (in ng/g of dry mass) were as follows: 47.69 - caffeic, 34.00 - p-coumaric, 15.35 - protocatechuic, 9.03 - p-hydroxybenzoic, 7.31 - ferulic and 6.22 - vanillic acid.

11

The ecological estimation of health-resort Wisla for heavy metals

86%

Nowak B., Koziol T.

Polish Journal of Environmental Studies

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1995

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tom 04

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nr 4

In this work an attempt has been made to determine the quality of atmospheric air and soil polluted by different emission sources (i.e. motorways, railways, coal fuel combustion in house furnaces, long-term range emission from Třinec, Czechoslovakia) in Wisła. The 180 air samples and 60 soil samples were collected in different zones in Wisła. In Wisła there are two linear emission sources: a motorway (average street traffic volume 324 vehicles/h) and a railway, which is in the centre of Wisła. Some parameters which characterise atmospheric air and soil quality were calculated. Investigation of the heavy metal content in air and soil was carried out in a residual area (coal fuel combustion) and in a "clean" area near Wisła (only long-term emissions from Czechoslovakia). The possible hazardous effects on the town's population are discussed.

12

The content of lipids and essential fatty acids in chicken bones

86%

Dolegowska B., Machoy Z., Chlubek D.

Natural Sciences

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2001

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tom 09

13

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Effect of the method and term of foliar nutrition with urea solution and a multiple fertilizer on nitrogen and dry mass content maize

86%

Kruczek A.

Acta Agrophysica

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2003

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tom 85

14

Content of carbon, nitrogen and selected heavy metals in composts

86%

Gondek K.

Journal of Elementology

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2007

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tom 12

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nr 1

Chemical composition of composts depends on a number of factors, including a type of composted waste and composting technology. This study was conducted to determine concentrations of carbon, nitrogen and selected heavy metals in composts manufactured from various waste substances and using different technologies. Organic carbon content in the composts depended on a type of composted waste - the smallest quantities were found in the compost of municipal waste. Organic matter transformations occurring during composting probably led to a systematic decline of the soluble organic compound amounts. The share of soluble carbon in the total concentration did not exceed 35% of the analysed composts. The composts based on plant waste were more abundant in nitrogen and the share of nitrogen extracted with sodium pyrophosphate and sodium base did not exceed 40%. Analysis of fractional composition of humus compounds of the composts revealed higher content of humic acid carbon in relation to fulvic acid carbon. The proportion of non-hydrolysing carbon in these materials was on average over 70%. The content of the most mobile heavy metal forms in the composts was low and implied that these elements occurred in a form less available to plants.

15

Content of cis9trans11 C18:2 acid [CLA] and trans isomers of C18:1 acid in yoghurts and bioyoghurts

86%

Paszczyk B., Zegarska Z., Borejszo Z.

Polish Journal of Food and Nutrition Sciences

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2006

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tom 15/56

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nr Spec.Issue 1

The research was aimed at comparing contents of cis9trans11 C18:2 acid (CLA) and trans isomers of C18:1 acid in commercial yoghurts and bioyoghurts as well as acquiring information whether CLA concentration in yoghurts and bioyoghurts differs from that in the initial material. Determinations were carried out with the method of gas chromatography using a 100-m capillary column with CP Sil 88 phase. Investigations demonstrated that in commercial yoghurts and bioyoghurts analysed the content of cis9trans11 C18:2 acid (CLA) and the total content of trans isomers of C18:1 acid were alike. The mean content of CLA in fat isolated from the yoghurts examined ranged from 0.41% to 0.43% of the total fatty acid composition, whereas in fat extracted from the bioyoghurts under study it ranged from 0.41% to 0.44%. The total content of trans isomers of C18:1 acid in yoghurts oscillated between 1.66% and 2.34% of the total fatty acid composition, and that in the bioyoghurts – between 1.95% and 2.91%. The content of cis9trans11 C18:2 acid in the total fatty acid composition of fat obtained from raw bulk milk examined did not differ from its content in fermented drinks produced from that milk. The mean content of CLA in fat of the yoghurts accounted for 0.53%, whereas that in fat of milk they were produced from – for 0.52%. Fat of the bioyoghurts analysed was characterised by a slightly lower content of cis9trans11 C18:2 acid as compared to the raw material. The mean content of trans isomers of C18:1 acid reached 2.25% in yoghurts, 2.00% in bioyoghurts and 2.13% of the total fatty acid composition in raw milk.

16

Contents of ginkgoflavonoglycosides and macronutrients in leaves of maidenhair tree [Ginkgo biloba L.]

86%

Korszun S., Golcz A.

Herba Polonica

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2006

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tom 52

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nr 4

Contents of ginkgoflavonoglycosides and macronutrients were analysed in leaves of maidenhair trees, collected from one- and two-year-old shoots, at four dates in 2002, from a field plantation established from a selected biotype. Gingkoflavonoglycoside contents were always higher in leaves collected from one-year-old shoots and ranged from 1.28% (30 August) to 1.54% (15 July). The highest contents of nitrogen, calcium and magnesium were recorded in leaves from one-year-old shoots, while that of potassium was higher in leaves collected from one-year-old shoots. Phosphorus content in July and mid-August was similar in one- and two-year-old leaves. In the third decade of August, especially in leaves collected from one-year-old shoots, phosphorus content was the lowest, amounting to 0.20%.

17

Influence of cultivation period, cultivar and usable part on content of chlorophylls and volatile oils in dill [Anethum graveolens L.]

86%

Lisiewska Z., Slupski J., Korus A.

Electronic Journal of Polish Agricultural Universities. Series Food Science and Technology

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2001

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tom 04

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nr 2

The investigation was carried out on the usable parts of dill plants, cultivars Amat, Ambrozja, and Lukullus, grown from spring to autumn. Dill seeds were sown on 10th April, 10th May, 10th June, 10th July, and 10th August 2000. Harvesting was conducted when the dill plants reached the height of 25-cm i.e. after 36-45 days, depending on the cultivar and period of cultivation. The content of chlorophyll a, chlorophyll b, total chlorophylls, and volatile oils was determined in the leafy part and in leaves with petioles of dill.

18

Content of essential oil obtained from flower heads of Echinacea purpurea L. and identification of selected components

86%

Holla M., Vaverkova S., Farkas P., Tekel J.

Herba Polonica

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2005

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tom 51

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nr 3-4

Hydrodistilled essential oil from flower heads of Echinacea purpurea (L.) Moench cultivated in Slovakia was analyzed by GC/MS method. Seventy-two components were identified and determined. As a result of studying the content and composition of the essential oil obtained from flower heads of E. purpurea it was established that the content of the essential oil was 1.85% (vAv) of the weight of dry material. The main components in the studied samples were palmitic acid, a-pinene, germacrene-D, ß-pinene, and a-phelandrene. The main components of the analyzed oil were palmitic acid (8.3%), nerolidol (6.6%), a-pinene (5.1%), germacrene-D (4.8%), a-phelandrene (4.3%), and ß-pinene (4.1%).

19

Effect of interaction of parental components on the content of protein and amino acids in triticale grain

86%

Stankiewicz C., Gruszecka D., Stec E., Mitrus J., Walo P., Kamecki M.

Electronic Journal of Polish Agricultural Universities. Series Agronomy

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2003

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tom 06

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nr 2

The research defined the effect of parent components of rye, Donar cultivar, and wheat cultivars, Aurora and Liwilla, on the content of total protein and protein amino acid composition of grain of primary forms of octoploid triticale (♀Aurora x ♂Donar, ♀Liwilla x ♂Donar). There was also determined the effect of crossing of the octoploid triticale forms obtained with hexaploid triticale CZR142/79 on the chemical characteristics (qualitative). The results obtained showed that primary forms of octoploid triticale contained more protein in grain than the parent plants. It can give a potential in further breeding work of giving high-protein high-starch cultivars. Both forms of octoploid triticale showed a higher level of lysine. Also the marked amino acids show that the biological value protein of triticale Liwilla x Donar was more similar to wheat protein, which points to a considerable effect of components derived from the basic form on the nutritional value.

20

Evaluation of heavy metals contents in spices and herbs available on the Polish market

86%

Krejpcio Z., Krol E., Sionkowski S.

Polish Journal of Environmental Studies

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2007

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tom 16

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nr 1

Herbs and spices are sources of many bioactive compounds that can improve the taste of foods as well as influence digestion and metabolism processes. They can also contain some undesirable components that can be harmful, e.g. micotoxins, pesticides, heavy metals, and polycyclic carbohydrates residues. The objective of this study was to determine Pb, Cd, Zn, and Cu contents in the most popular spices and herbs used in Polish cuisine. The content of these metals was assayed by the AAS method. The results were compared with the safety standards established by the National Ministry of Health. Excessive amounts of Pb were found in 40% of basil, 42% of cinnamon, 25% of savory and 6% of dried onion samples. Increased levels of Cd were detected in 20% of basil, 25% of savory and 42% of cinnamon samples. Zn and Cu levels in all herbs and spices were within the safe limits.

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