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1

Kryteria identyfikacji gatunkowej zębiełków fauny krajowej

100%
Michalak I.
Przegląd Zoologiczny
|
1989
|
tom 33
|
nr 2
2

Growth and postnatal development of the European water shrew

100%
Michalak I.
Acta Theriologica
|
1987
|
tom 32
|
nr 11-20
3

Nietypowe gniazdo sroki, Pica pica (L.)

100%
Michalak I.
Przegląd Zoologiczny
|
1988
|
tom 32
|
nr 1
4

Behaviour of young Neomys fodiens in captivity

100%
Michalak I.
Acta Theriologica
|
1988
|
tom 33
|
nr 26-43
5

Porownanie procesu biosorpcji i bioakumulacji mikroelementow przez makroalge Vaucheria sessilis

63%
Michalak I., Chojnacka K.
Biotechnologia
|
2010
|
nr 1
132-146
6
Artykuł dostępny w postaci pełnego tekstu - kliknij by otworzyć plik
Content available

The potential usefulness of a new generation of agro-products based on raw materials of biological origin

63%
Michalak I., Chojnacka K.
Acta Scientiarum Polonorum. Hortorum Cultus
|
2016
|
tom 15
|
nr 6
The article discusses the possibility of the use of algal products, obtained by different methods – extraction (traditional solvent extraction, supercritical fluid extraction, extraction assisted by microwave) and homogenization, in the cultivation of plants. Algal extracts were discussed for their use as potential plant growth biostimulants and the homogenates as formulations for seed treatment. The work is focused on the possibility of using primarily macroalgae from the Baltic Sea basin (in many seaside resorts constitute a waste due to eutrophication) as raw material for the extraction/homogenization. Examples of the research (laboratory – germination tests and field trials) on the impact of algal preparations on the plant growth were presented. Literature data indicate that the algae based products increase the content of micro-, macroelements, chlorophyll in the cultivated plants, as well as their length and weight. Therefore, in the future, they may complement the range of products available on the market.
7

Effects of local Industry on heavy metals content in human hair

51%
Chojnacka K., Saeid A., Michalak I., Mikulewicz M.
Polish Journal of Environmental Studies
|
2012
|
tom 21
|
nr 6
In the present work hair mineral analysis of 110 individuals was carried out to determine environmental exposure based on the distance from a subject’s residence to a pollutant source. The subjects were asked to fill in a questionnaire concerning their place of living in the city of Wrocław (lower Silesia, Poland), which was divided in 12 sectors. The content of minerals in hair was determined by ICP-OES and ICP-MS technique in a laboratory certified by the Polish Centre for Accreditation and ILAC-MRA (No. AB 696). The results were elaborated statistically. Each person served as the experimental unit. Post-hoc comparisons were made by Tukey's test and the Spjotvoll/Stolin test. Results were considered significantly different when p<0.1. The differences in the content of As were statistically significant between IV-V regions (p=0.0182), IV-VII (p=0.0720), and IV-XII (p=0.0586). In the case of Cd, statistically significant differences were found between II and XII region (p=0.0377). Hair has been found to be a valuable indicator of environmental pollution in Wrocław. The highest content of Al was found in sector VII, As – IV, Cd – II, Hg – VIII, Ni – V, and Pb – IX. The explanation could be the vicinity to a heat and power generating plant and a non-ferrous metals plant or other industrial units, as well as interactions between elements in a human organism. Additionally, statistically significant differences between Ni content (p=0.0591) in hair of males and females were found. These results showed that hair mineral content reflected exposure to elements from the environment.
8

The effect of chair characteristics and treatments on mineral composition of scalp hair

51%
Chojnacka K., Michalak I., Saeid A., Mikulewicz M.
Polish Journal of Environmental Studies
|
2012
|
tom 21
|
nr 5
In the present work, the effects of hair type (weak/strong, greasy/normal/dry, presence of dandruff) and cosmetic treatments (using hair dryer, anti-dandruff shampoos) on hair mineral composition was discussed. The application of hair mineral analysis was exemplified by identification of exposure to elements from deodorants. Hair was sampled from 155 individuals who were asked to fill out a questionnaire. The elemental composition of hair was determined by ICP-OES (macroelements and major microelements) and ICP-MS (minor microelements, toxic elements, and other trace elements). Mercury was analyzed by AAS Mercury Analyzer. The results were elaborated statistically by Statistica 8.0. Statistical significance of differences was detennined by U Mann-Whitney test (p<0.05, p<0.1). For elements, the content of which differed between the groups, the reference ranges were elaborated, as were values within the 10th and 90th percentiles. Healthy and strong hair not dried with a dryer contained statistically significantly more K and La and less Co and Ca than destroyed, weak, dried hair and hair with dandruff. In hair with dandruff, statistically higher levels of Hg were found. The results of hair mineral analysis showed that Zn and Se were deposited on hair cuticle exogenously from medicated anti-dandruff shampoo from active ingredients. This technique was used to assess dermal exposure from deodorants. Individuals who used stiff, which contains the compound Zr as antiperspirant, contained 3 to 5 times higher levels of this element than those who used deo roll-on or spray, respectively.
9

Research on mercury levels in scalp hair

51%
Michalak I., Chojnacka K., Saeid A., Mikulewicz M.
Polish Journal of Environmental Studies
|
2014
|
tom 23
|
nr 3
The aim of the present work was to evaluate the mercury content in hair of inhabitants of Wrocław, in southwestern Poland. On the basis of a questionnaire and analysis of hair by atomic absorption spectroscopy, it was possible to indicate the sources of mercury exposure. The mean mercury level in hair of the whole population (n=321) was 0.203±0.181 mg·kg⁻¹. The content of mercury in hair of subjects who consumed fish exceeded the upper limit of reference value, which was 0.397 mg·kg⁻¹. Subjects who declared consumption of fish, honey, and mouldy cheese, contained statistically more mercury: 60.5%, 35.4%, and 37.8%, respectively, than those who did not eat these types of food. It was noticed that there was no effect from the place of residence, the presence of pollution emitters, gender, age, weight, height, presence of amalgam fillings, hair dyeing, and smoking cigarettes on mercury content in hair.
10

Densities and habitats of the Tawny Pipit Anthus campestris in the Wielkopolska region [W Poland]

51%
Grzybek J., Michalak I., Osiejuk T. S., Tryjanowski P.
Acta Ornithologica
|
2008
|
tom 43
|
nr 2
221-225
The material was collected in a large plot (100 km2) in west-central Poland in 2004-2005. The average density was 85.5 breeding pairs/100 km2 and was similar during both years of the study. The vegetation structure (visibility of the territory surroundings, and height and density of the under-storey vegetation) was described for 82 pipit territories in 2004, and for 33 additional territories in 2005. The same information on habitat variables was collected in randomly selected localities. Tawny Pipits use nesting sites with very short vegetation and with a high number of areas free of vegetation or only covered with dry mosses. The available data on the Tawny Pipit's habitat in different European localities show that the species is able to occupy a much wider range of habitats. Destruction of habitats, for example, for the construction of a new motorway, influenced pipit numbers and distribution in the study area; even so, the studied population remains the densest and most stable in the geographical range of the species. Although the study area contains Tawny Pipits and other interesting species from a conservation point of view, protection of the land may be very difficult owing to changes in habitats that are being destroyed both by infrastructure investments, and also by the financial support farmers receive from the European Union, which allows them to cultivate more land and thus destroy bird habitats.
11

Co-composting of algae and effect of the compost on germination and growth of Lepidium sativum

51%
Michalak I., Tuhy L., Chojnacka K.
Polish Journal of Environmental Studies
|
2016
|
tom 25
|
nr 3
In order to obtain a value-added product from the removal and processing of waste algal biomass, it is essential to elaborate on cost-effective methods of their utilization. Composting appears to be one of the methods of obtaining a natural fertilizer. This paper demonstrates the results of a study where the biomass of seaweed (Fucus sp.) has been co-composted with ecological hay, grass, sawdust, and spent mushroom substrate for three months. The utilitarian properties of the new natural products (compost and compost extract) were examined in germination tests on Lepidium sativum. Three groups were compared: the control group treated with distilled water, and two experimental groups: one treated with seaweed extract and the other fertilized with algal compost. Results showed that the addition of compost and compost extract contributed to the increase in plant length and mass. Moreover, the biomass fertilized with new products was rich in micro- and macroelements (in particular B, Fe, Cu, Zn, Ca, K, S). Utilization of algal biomass for agricultural and horticultural purposes could be benefi cial for environmental protection in that it might help remove waste biomass from coastal areas and from the point of view of the economy by resulting in the production of value-added natural fertilizers and biostimulants (extracts). The latter could help reduce the use of chemical fertilizers and could help to improve physicochemical properties of the soil, thus producing an enhanced seed yield.
12

Obserwacje puszczyka mszarnego (Strix nebulosa) w Puszczy Białowieskiej

45%
Lontkowski J., Michalak I., Skoczynska J., Walankiewicz W., Walencik J.
Notatki Ornitologiczne
|
1989
|
tom 30
|
nr 3-4
13
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Content available

Incidence of abnormalities in temporomandibular joints in a population of 1,100 urban and rural patients lacking teeth and other parafunctions in 2003-2008. An international problem

39%
Michalak M., Paulo M., Bozyk A., Zadrozny L., Wysokinska-Miszczuk J., Michalak I., Borowicz J.
Annals of Agricultural and Environmental Medicine
|
2013
|
tom 20
|
nr 1
Introduction and objective. A hectic lifestyle and everyday stress are direct causes of parafunctions. The objective of the presented study was to examine the relation of sleep disorders, distant pain symptoms, symptoms of pathological tooth wear in rural and urban patients with parafunctions. Materials and methods. The patient group consisted of 836 women and 274 men aged 9-82, and divided into groups taking into account the following criteria: number of patients in certain age groups, number of women and men, place of residence, presence of missing teeth problem, presence of occlusal and non-occlusal parafunctions, symptoms of tooth wear, distant pain symptoms, and sleep disorders. Results. 354 (31.89%) of the patients came from the rural environment. Distant pain symptoms were more frequent in patients performing parafunctions than in those who did not perform parafunctions (n = 1110, RR = 1.10, CI = from 1.04 to 1.16). Sleep disorders were more frequent in patients performing parafunctions than in those who do not perform parafunctions (n = 1110, RR = 1.06, CI = from 1.00 to 1.12). Symptoms of pathological tooth wear were more frequent in patients performing parafunctions than in those who did not perform parafunctions (n = 1110, RR = 1.08, CI = from 1.02 to 1.13). Conclusions. It is extremely important (as it is international problem) to introduce prophylactic care to prevent the occurrence of parafunctional activity in patients from the rural environment. Parafunctions, therefore, should be taken into account in the diagnosing procedure of such disorders and pathological symptoms as pathological tooth wear, sleep disorders, cervicalgia, neck myalgia, shoulder girdle myalgia, and dorsalgia.
14

Biomonitoring release of elements from water pipes using hair mineral analysis

39%
Chojnacka K., Mikulewicz M., Michalak I., Saeid A., Gorecka H., Gorecki H.
Polish Journal of Environmental Studies
|
2011
|
tom 20
|
nr 6
This paper reports the results of a biomonitoring study of exposure to elements released by water pipes by hair mineral analysis with the consideration of gender. Hair of a population of 117 students living in an urban area in Poland was analyzed for the content of elements by ICP-OES (macroelements) and ICP-MS (micro-, toxic and other trace elements). The participants were grouped according to the material of which water pipes in their households were made (steel, copper, plastic). The population was of uniform age (21-22 years). The mean values and standard deviations of the content of 34 elements were reported for the whole population as well as for other populations and the subgroups. The mean level of the following elements was higher: As, Ba, Bi, Ca, Na, and lower: Hg. Statistically significant differences between the subpopulations for which the grouping variable was the type of tap water pipes were found for the following elements: Fe, Mn, Na, Ti (release order: plastic>steel>copper), Mg (copper>plastic>steel), Ni (plastic>copper>steel). The composition of water (from the same water purification station), from pipes made of different materials: steel, copper and plastic was determined. The release of elements to water was confirmed. The results of biomonitoring study by hair mineral analysis were compared with multielemental analysis of water. Plastic pipes were found to release the highest quantities of elements, which was confirmed by both a biomonitoring study and direct analysis of water: Ni, Ti, Al, Hg, Sn, Mo, Li, Ag, Cu, Sr, B. For copper pipelines both types of analyses showed release of: Ag, Cu, Si, As, and in steel: Zr and Zn. Elements, the level of which depended on sex, were indicated. The content of elements in hair and also the effect of gender were compared with other populations reported in the literature. Additionally, ratios between elements in the present and in various groups were investigated. It was found that the content of alkaline earth metals (Ba, Ca, and Mg) was statistically significantly higher in hair of females than males in almost all the groups. The release of elements with gender as additional grouping variable was confirmed for Ag and As, which were eluted in the highest amounts from copper plumbing, Mn and Si from plastic pipes. Hair of males seemed more appropriate for a biomonitoring study since more statistically significant differences were confirmed. This can be explained with the cosmetic treatment of hair by females.
15
Artykuł dostępny w postaci pełnego tekstu - kliknij by otworzyć plik
Content available

Oznaczanie zawartości azotynów i azotanów w niektórych warzywach krajowych

27%
Lemieszek-Chodorowska K., Michalak I., Pukorska W., Lisowska W., Kotlarek J., Cywinska M., Kula H., Mazurkiewicz K., Jarysz M., Kosinska K., Modrzejewska H., Kujawska T.
Roczniki Państwowego Zakładu Higieny
|
1972
|
tom 23
|
nr 5
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