Search results

1

Influence of Chemical Composition on Porosity in Aluminium Alloys

100%

Kucharčík L., Brůna M., Sládek A.

Archives of Foundry Engineering

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2014

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issue 2

2

Seasonal changes in nitrogen fractions in the Antarctic krill (Euphausia superba Dana), Part 1. Basic nitrogen fractions

100%

Kołakowski E., Kołakowski E.

Polish Polar Research

|

1987

|

vol. 8

|

issue 2

3

Changes in the properties of pig manure slurry

100%

Kowalski Z., Makara A., Fijorek K.

Acta Biochimica Polonica

|

2013

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vol. 60

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issue 4

845-850

EN

The paper presents the results of analyses of samples of manure from a pig farm located near Piła, Poland performed between June 2011 and May 2012 using a single sampling system. The statistical analyses of the average content of chemical and biological oxide demands, nitrogen, phosphorus, potassium, calcium and dry mass in the slurry in various seasons allowed us to draw conclusions concerning the changes in the chemical composition of the manure in specific seasons and to determine the correlations between the chemical parameters. The average content of N, BOD, P, and dry mass content tended to decrease systematically from the spring until the winter. The highest correlation coefficient, which indicates significant interdependency among the variables tested, was consistently found for COD and BOD, whereas the smallest correlation coefficient was found consistently for K and Ca and once for Ca and N.

4

Hydrochemical characteristics of a spring snowmelt flood in the Upper Wieprz River basin (Roztocze region) in year 2006

88%

Chmiel S., Maciejewska E., Michalczyk Z., Chmiel S., Maciejewska E., Michalczyk Z.

Journal of Water and Land Development

|

2009

|

issue 13B

5

Skład chemiczny i mineralny Szkła Pustyni Libijskiej: badania wstępne z wykorzystaniem mikroskopu skaningowego (SEM) oraz mikrosondy elektronowej (EMPA)

75%

Szopa K., Brachaniec T., Szczyrba M.

Acta Societatis Metheoriticae Polonorum

|

2015

|

vol. 6

103-106

EN

In this study, fragment of the Libyan Desert Glass was investigated by using scanning electron microscope (SEM) and electron microprobe (EMP). The analyses reveal two differ areas in chemistry. the first one is homogenous in composition, but the second one is slightly enriched in Ti, and Fe content. During SEM and EMP observation, a relict of primary minerals was noted as a cracked zircon crystals.

6

The Effect of Different Sowing Rate, Foliar Fertilization and Chemical Composition on the Mechanical Properties of Narrow-Leaved Lupine Seeds (Lupinus angustifolius L.)

75%

Kuźniar P., Jarecki W., Sosnowski S., Bobrecka-Jamro D., Matłok N., Migut D.

Teka Commission of Motorization and Power Industry in Agriculture

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2016

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vol. 16

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issue 4

7

Preliminary determination of the suitability of slags resulting from coal gasification as a pozzolanic raw material

75%

Mazurkiewicz M., Tkaczewska E., Pomykała R., Uliasz-Bocheńczyk A., Mazurkiewicz M., Tkaczewska E., Pomykała R., Uliasz-Bocheńczyk A.

Gospodarka Surowcami Mineralnymi

|

2012

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vol. 28

|

issue 4

8

Chemical profile and antibacterial activity of essential oils from leaves and fruits of Gaultheria procumbens L. cultivated in Poland

75%

Magiera A., Sienkiewicz M., Olszewska M., Kicel A., Michel P.

Acta Poloniae Pharmaceutica - Drug Research

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2019

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vol. 76

|

issue 1

93-102

EN

Essential oils (EOs) of Gaultheria procumbens were obtained by hydrodistillation with the yield of 1.30% ± 0.05 (v/dw) for leaves and 2.68% ± 0.08 (v/dw) for fruits. The GC-FID/MS analysis led to the identification of 64 volatile components, among which 27 were found in leaf EO, 49 in fruit EO, and 59 analytes were detected for the first time in G. procumbens. Methyl salicylate, which is known as a potent anti-inflammatory agent, was the dominant component making up to 97.5% and 99.8% of the total fruit and leaf EOs, respectively. The remaining volatiles of the leaves included mainly monoterpenes (α-pinene, β-pinene, limonene), methyl-o-anisate, massoilactone, spiro[4,5]decane-1-one, and aliphatic alcohols (heptan-2-ol, octan-1-ol), while the fruit EO contained apart from the dominant aliphatic and aromatic alcohols (benzyl alcohol, heptan-2-ol, p-cymen-7-ol) also carboxylic acids (3-hydroxyphenylacetic acid, heptanoic acid, octanoic acid) and aldehydes (hexanal, furfural, pent-4-enal). The antibacterial activity of the EOs was evaluated using a microdilution broth method against twelve reference strains, as well as clinical and environmental isolates. Differences between activity parameters of both EOs were not statistically significant (p > 0.05) for most tested bacteria. On the other hand, both EOs were significantly more effective against Gram-negative (MIC, 8.2-10.0 mg/mL) than Gram-positive bacteria (MIC, 13.5-16.7 mg/mL). Leaves and especially fruits of G. procumbens cultivated in Poland were proved valuable sources of methyl salicylate-rich EOs of moderate antibacterial activity, which, therefore, could partly explain the traditional use of the plant materials and the EOs in the treatment of bacterial infections-related inflammatory disorders.

9

Comparison of Cupola Furnace and Blast Furnace Slags with Respect to Possibilities of Their Utilization

75%

Pribulová A., Futáš P., Petrík J., Pokusová M., Brzeziński M., Jakubski J.

Archives of Metallurgy and Materials

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2018

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vol. 63

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issue 4

10

Właściwości prozdrowotne melisy lekarskiej (Melissa officinalis L.)

75%

Połumackanycz M., Wesołowski M., Viapiana A.

Farmacja Polska

|

2020

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vol. 75

|

issue 12

659-663

EN

More than 20.000 plant species are used in various traditional medicines around the world, and are considered as potential reservoirs for discovery of new drugs. One of these plants is Melissa officinalis L., commonly known as lemon balm, belongs to the family of Lamiaceae. For more than 2000 years, fragrant leaves of this plant have been widely used in cooking to add flavor to dishes. Moreover, lemon balm has also been used for the treatment of various mental diseases [1], migraines, digestion and cardiovascular problems [2], and sleeping aid [3]. Medicinal properties of Melissa officinalis L. Were first introduced by Dioscorides, the father of pharmacology, in De Materia Medica. Since them, medicinal properties of this plant were mentioned in many other medical books including Canon of Medicine by Avicenna. Melissa officinalis L. is listed in several pharmacopeias including European Pharmacopeia, British Herbal Pharmacopeia and Iranian Herbal Pharmacopeia. Modern studies demonstrated that Melissa officinalis L. has several biological properties including hypoglycemic, antioxidant, hypolipidemic, anticancer, antidepressant, antimicrobial, anxiolytic, anti-inflammatory, antinociceptive and spasmolytic properties. Melissa officinalis L. owes its biological properties to the chemical composition. The main active constituents of lemon balm are volatile compounds, terpenes, phenolic acids and flavonoids, while hydrocxycinnamic acids, commonly expressed as rosmarinic acid, are biomarkers of quality control according to World Health Organization (WHO) monographs on medicinal plants. Therefore, this study aimed to provide a summary on the botanical characterization, traditional use, chemical composition and pharmacological properties of Melissa officinalis L. Modern pharmacological studies have validated many traditional uses of lemon balm. The data showed in this study reviewed that Melissa officinalis L. is a potential source for the treatment of a wild range of civilization diseases.

PL

Na świecie ponad 20 000 różnych gatunków roślin jest stosowanych w medycynie tradycyjnej, a ponadto stanowią one cenny składnik wielu współczesnych leków ziołowych. Jedną z takich roślin jest melisa lekarska (Melissa officinalis L.), powszechnie znana, należąca do rodziny jasnotowatych (Lamiaceae). Od ponad 2000 lat liście melisy, ze względu na swój zapach, są stosowane jako przyprawa do potraw. Poza tym, melisa jest także stosowana we wspomaganiu leczenia chorób psychicznych [1], migren, zaburzeń układu trawiennego, układu krążenia [2] czy problemów z zasypianiem [3]. Po raz pierwszy właściwości prozdrowotne melisy lekarskiej opisał Dioskurydes w słynnej księdze De Materia Medica. Od tego czasu roślina ta zaczęła być opisywana w wielu innych książkach, jak np. w Kanonie Medycyny, napisanym przez perskiego lekarza Awicennę. Obecnie prowadzone badania naukowe wykazały szereg właściwości prozdrowotnych melisy lekarskiej, jak chociażby jej właściwości przeciwutleniające, przeciwdepresyjne, uspokajające, przeciwzapalne czy spazmolityczne. Właściwości te melisa zawdzięcza swemu składowi chemicznemu. Głównymi składnikami aktywnymi melisy są związki lotne, terpeny, kwasy fenolowe i flawonoidy. Według monografii Światowej Organizacji Zdrowia kwas rozmarynowy jest biomarkerem wskazującym na jakość tego surowca. Celem niniejszej pracy było przedstawienie charakterystyki botanicznej, zastosowania, składu chemicznego oraz właściwości farmakologicznych melisy lekarskiej. Współczesne badania farmakologiczne potwierdzają zastosowanie melisy lekarskiej w medycynie ludowej. Przegląd danych literaturowych potwierdza, iż melisa lekarska jest potencjalnym źródłem wspomagającym leczenie wielu chorób cywilizacyjnych.

11

Groundwater property and composition variability under long-term irrigated area of Wonji Plain, Ethiopia

75%

Dinka M. O.

Journal of Water and Land Development

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2019

|

issue 41

12

Chemical characteristics of dust from cement kilns

75%

Uliasz-Bocheńczyk A.

Gospodarka Surowcami Mineralnymi

|

2019

|

vol. 35

|

issue 2

13

Texture and geochemistry of surface horizons of Arctic soils from a non-glaciated catchment, SW Spitsbergen

75%

Szymański W., Siwek J., Waścińska J., Wojtuń B.

Polish Polar Research

|

2016

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vol. 37

|

issue 3

14

Mineralization of penguin excrements in the Admiralty Bay region (King George Island, South Shetland Islands, Antarctica)

75%

Pietr S. J., Tatur A., Myrcha A., Pietr S. J., Tatur A., Myrcha A.

Polish Polar Research

|

1983

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vol. 4

|

issue 1-4

15

Odżywcze i prozdrowotne właściwości ziarna owsa i przetworów owsianych

63%

Zarzecka K., Gugała M., Mystkowska I., Baranowska A., Sikorska A., Zarzecka M.

Kosmos

|

2018

|

vol. 67

|

issue 2

409-414

PL

W pracy przedstawiono krótką historię uprawy owsa, charakterystykę botaniczną, skład chemiczny ziarna, wartość odżywczą i prozdrowotną oraz wielostronne wykorzystanie. Owies i jego produkty są cennym źródłem wielu bioaktywnych składników odżywczych i substancji, takich jak: białka, lipidy, składniki mineralne, witaminy, błonnik pokarmowy, beta-glukany, polifenole. Owies jest zbożem o prozdrowotnym działaniu na organizm człowieka. Zdaniem żywieniowców i lekarzy, produkty owsiane mogą stanowić cenne uzupełnienie diety, zwłaszcza u osób z chorobami, takimi jak: zaburzenia czynności przewodu pokarmowego, miażdżyca, nadciśnienie, nadwaga czy obniżona sprawność psychofizyczna.

EN

The article presents a brief history of oat cultivation, botanical characteristic of the plant, chemical composition of its grain, nutritional and pro-health values and multi-purpose utilization. Oat and oat products are precious source of many bioactive nutrients components and substances such as: proteins, lipids, mineral compounds, vitamins, dietary fibre, beta-glucans, polyphenols. Oat is a health promoting grain for the human body. Nutritionists and physicians believe that oat products may be a beneficial diet supplement highly recommended for people suffering from such diseases as: gastrointestinal track disorders, atherosclerosis, hypertension, overweight and reduced psychophysical efficiency.

16

Production of Spindle Palm Petiole Fiber Reinforced High Density Polyethyele Composites

63%

Nneka E. L., Monday O., Nnaemeka O. B., Uzoma E. R.

|

EN

The work is on the production of spindle palm petiole fiber reinforced high density polyethylene (HDPE) composites. The Spindle Palm Petiole Fiber (SPPF) and HDPE composites were produced using injection molding machine. SPPF were characterized to determine their chemical compositions. Central Composite Design (CCD) was applied as an optimization tool of RSM for cellulose and tensile strength. The chemical composition of the SPPF is cellulose (65%), hemicelluloses (17.1%) and lignin (14.1%). Surface modifications of the fiber enhanced the properties of the fiber. Quadratic model adequately described the relationship between percentage cellulose yield and variables: chemical concentration, mass/volume ratio and time. The cellulose content at optimal level is 60.3% at 3.5wt% concentration, 4g/l mass/volume ratio and time of 16hr. Also for the composite, the quadratic model described the relationship between tensile strength and temperature, fiber/polymer ratio and time. The optimum tensile strength of 42.0 Mpa was obtained at fiber/polymer ratio of 29wt%, temperature of 172 °C and time of 10 min. Water absorbed by the untreated fiber was high compared to the chemically treated fiber. The chemical treatment created a better interfacial bonding of SPPF/HDPE and this could be responsible for the observations.

17

Ocena składu i zastosowanie olejków eterycznych z rodzaju centaurea l.

63%

Józefczyk A., Kowalska J.

Kosmos

|

2018

|

vol. 67

|

issue 2

319-334

PL

Centaurea L. jest jednym z liczniejszych (czwartym, co do wielkości) rodzajów rodziny Asteraceae, należącym do grupy roślin okrytonasiennych (kwiatowych). Morfologia i chemizm tego rodzaju, wciąż jeszcze nie są dobrze poznane. Obejmuje on najczęściej wieloletnie, ale również roczne i dwuletnie gatunki roślin trawiastych i krzewinek. Rośliny z rodzaju Centaurea L. występują głównie w obszarze Morza Śródziemnego i Zachodniej Azji. Rodzaj ten jest jednym z najbogatszych pod względem występowania gatunków endemicznych. Szczególnie dużą liczbę gatunków Centaurea L. spotkać możemy w Turcji, głównie w południowo-zachodniej, centralnej i wschodniej części kraju. Badania etnofarmakologiczne tego rodzaju wykazały, że duża liczba tych roślin jest w wielu krajach używana w medycynie ludowej do leczenia różnych dolegliwości. W niniejszej pracy przedstawiono przegląd olejków eterycznych pozyskiwanych z wybranych 50 gatunków roślin rodzaju Centaurea L., ze szczególnym uwzględnieniem ich składu i związków dominujących. Opisano właściwości olejków, na podstawie których wnioskować można potencjalne ich wykorzystanie w lecznictwie, przemyśle kosmetycznym czy spożywczym.

EN

Centaurea L. is one of a more numerous genus of the Asteraceae family, ranked among the group of Angiosperm plants (flowering plants), morphology and chemical composition of which are still not well known. Most often it includes long-term plant species, but also annual and two-year species of Graminaceous plants and shrubs. Plants from the Centaurea L. genus are found mainly in an area of the Mediterranean Sea and Western Asia. This genus is one of the richest in terms of occurrence of endemic species. Particularly large amounts of Centaurea L. species live in Turkey, mainly in south-west, central and of eastern part of the country. Ethnopharmacological examinations of the genus showed that a substantial amount of these plants in many countries is being used in the folk medicine for curing various ailments. In this paper essential oils acquired from 50 chosen species of the Centaurea L. plants are described, with particular reference to their chemical composition and properties important from the point of view of their possible application in health care, cosmetics and food industries.

18

Chemism of some species of Antarctic macroalgae of the genera Adenocystis, Himantothallus, Leptosomia and Monostroma

63%

Czerpak R., Mical A., Gutkowski R., Siegień I., Jackiewicz I., Czerpak R., Mical A., Gutkowski R., Siegień I., Jackiewicz I.

Polish Polar Research

|

1981

|

vol. 2

|

issue 3-4

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Influence of Chemical Composition on Porosity in Aluminium Alloys

Seasonal changes in nitrogen fractions in the Antarctic krill (Euphausia superba Dana), Part 1. Basic nitrogen fractions

Changes in the properties of pig manure slurry

Hydrochemical characteristics of a spring snowmelt flood in the Upper Wieprz River basin (Roztocze region) in year 2006

Skład chemiczny i mineralny Szkła Pustyni Libijskiej: badania wstępne z wykorzystaniem mikroskopu skaningowego (SEM) oraz mikrosondy elektronowej (EMPA)

The Effect of Different Sowing Rate, Foliar Fertilization and Chemical Composition on the Mechanical Properties of Narrow-Leaved Lupine Seeds (Lupinus angustifolius L.)

Preliminary determination of the suitability of slags resulting from coal gasification as a pozzolanic raw material

Chemical profile and antibacterial activity of essential oils from leaves and fruits of Gaultheria procumbens L. cultivated in Poland

Comparison of Cupola Furnace and Blast Furnace Slags with Respect to Possibilities of Their Utilization

Właściwości prozdrowotne melisy lekarskiej (Melissa officinalis L.)

Groundwater property and composition variability under long-term irrigated area of Wonji Plain, Ethiopia

Chemical characteristics of dust from cement kilns

Texture and geochemistry of surface horizons of Arctic soils from a non-glaciated catchment, SW Spitsbergen

Mineralization of penguin excrements in the Admiralty Bay region (King George Island, South Shetland Islands, Antarctica)

Odżywcze i prozdrowotne właściwości ziarna owsa i przetworów owsianych

Production of Spindle Palm Petiole Fiber Reinforced High Density Polyethyele Composites

Ocena składu i zastosowanie olejków eterycznych z rodzaju centaurea l.

Chemism of some species of Antarctic macroalgae of the genera Adenocystis, Himantothallus, Leptosomia and Monostroma