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Tytuł:
Immunotherapy with interleukin-2: a study based on mathematical modeling
Autorzy:
Banerjee, S.
Powiązania:
https://bibliotekanauki.pl/articles/907902.pdf
Data publikacji:
2008
Wydawca:
Uniwersytet Zielonogórski. Oficyna Wydawnicza
Tematy:
komórka
efektor
nowotwór
opóźnienie czasowe
interleukina
effector cells
tumor cells
interleukin-2
discrete time delay
Opis:
The role of interleukin-2 (IL-2) in tumor dynamics is illustrated through mathematical modeling, using delay differential equations with a discrete time delay (a modified version of the Kirshner-Panetta model). Theoretical analysis gives an expression for the discrete time delay and the length of the time delay to preserve stability. Numerical analysis shows that interleukin-2 alone can cause the tumor cell population to regress.
Źródło:
International Journal of Applied Mathematics and Computer Science; 2008, 18, 3; 389-398
1641-876X
2083-8492
Pojawia się w:
International Journal of Applied Mathematics and Computer Science
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Implications of global warming on changing trends in crop productivity - a review
Autorzy:
Banerjee, S.
Banerjee, P.
Mukhopadhayay, A.
Powiązania:
https://bibliotekanauki.pl/articles/11606.pdf
Data publikacji:
2014
Wydawca:
Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:
global warming
climate change
trend
crop productivity
carbon dioxide
weather parameter
Opis:
Evidence of changes in weather parameters like ambient temperature, precipitation, wind flow, etc., are prominently visible across the world. These changes have been reported to effect global crop yield. This review compiles both direct and indirect effects of climate change on global crop productivity with highlights on existing local and global scenarios. As a conclusion, it may be stated that thorough understanding of agricultural techniques and analysis of global change factors is highly essential for achieving sustainable agricultural yield over the upcoming years.
Źródło:
International Letters of Natural Sciences; 2014, 06
2300-9675
Pojawia się w:
International Letters of Natural Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Seismic and non-seismic soft-sediment deformation structures in the Proterozoic Bhander Limestone, central India
Autorzy:
Sarkar, S.
Choudhuri, A.
Banerjee, S.
Van Loon, A. J.
Bose, P. K.
Powiązania:
https://bibliotekanauki.pl/articles/94668.pdf
Data publikacji:
2014
Wydawca:
Uniwersytet im. Adama Mickiewicza w Poznaniu
Tematy:
seismites
soft-sediment deformation structures
basin subsidence
Proterozoic
India
sejsmity
struktury deformacji
osady miękkie
proterozoik
Indie
Opis:
Numerous soft-sediment deformation structures occur within the Proterozoic Bhander Limestone of an intracratonic sag basin in a 750 m long section along the Thomas River, near Maihar, central India. Part of these deformation structures have most probably a non-seismic origin, but other structures are interpreted as resulting from earthquake-induced shocks. These seismic structures are concentrated in a 60 cm thick interval, which is interpreted as three stacked seismites. These three seismites are traceable over the entire length of the section. They divide the sedimentary succession in a lower part (including the seismites) deposited in a hypersaline lagoon, and an upper open-marine (shelf) part. Most of the soft-sediment deformations outside the seismite interval occur in a lagoonal intraclastic and muddy facies association. The SSDS within the seismite interval show a lateral continuity. They record simultaneous fluidisation and liquefaction. The bases of each of the three composing seismite bands are defined by small-scale shear folds, probably recording an earthquake and aftershocks. The presence of the three seismite bands at the boundary between the lagoonal and the overlying open-marine oolitic facies association suggests that the seismic event also triggered basin subsidence.
Źródło:
Geologos; 2014, 20, 2; 89-103
1426-8981
2080-6574
Pojawia się w:
Geologos
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Design and Evaluation of the Thermal Properties of Di-, Tri- and Tetra-Azido-Esters
Autorzy:
Kumar, S.
Kumar, A.
Yamajala, K. D. B.
Gaur, P.
Kumar, D.
Banerjee, S.
Powiązania:
https://bibliotekanauki.pl/articles/358266.pdf
Data publikacji:
2017
Wydawca:
Sieć Badawcza Łukasiewicz - Instytut Przemysłu Organicznego
Tematy:
azido-esters
energetic plasticizers
DFT
contact angle
Opis:
A group of polycyclic and aliphatic azido-esters (as energetic plasticizers) have been synthesized by simple synthetic routes and their molecular structures were confirmed by spectroscopic techniques. In addition, their thermal and rheological properties have been determined utilizing DSC, TGA, viscosity, and contact angle. Computational studies of these plasticizers have been performed by means of DFT (B3LYP/6-31G*) to estimate possible stable structures, energies, heat of formation, bond dissociation energies, IR and NMR spectra etc. Their compatibility with glycidyl azide polymer (GAP) binder was studied to explore their applicability in propellants. All of these molecules are novel and have been synthesized with the possibility of scale up.
Źródło:
Central European Journal of Energetic Materials; 2017, 14, 4; 844-860
1733-7178
Pojawia się w:
Central European Journal of Energetic Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The future of infrared spectroscopy in biosciences: In vitro, time-resolved, and 3D
Autorzy:
Chen, Hsiang-Hsin
Bobroff, V.
Delugin, M.
Pineau, R.
Noreen, Razia
Seydou, Yao
Banerjee, S.
Chatterjee, J.
Javerzat, S.
Petibois, C.
Powiązania:
https://bibliotekanauki.pl/articles/1065164.pdf
Data publikacji:
2016-02
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
87.10.Ca
Opis:
Infrared (IR) spectroscopy is at the cross-roads, with the requirement to compete with cutting-edge technologies in biosciences, mostly based on analytical performances dealing with the super-resolutions: time, lateral/spatial, and contrast. IR microscopy is diffraction limited in most cases, thus not accessing to high lateral/spatial resolutions. Additionally, it has a poor signal-to-noise ratio on a single scan, thus requiring long-lasting acquisitions that are not suitable to analyze ns-lasting biochemical events. However, it is unique because it provides a broad global chemical information of the sample contents. It is also unique because it does not require heavy sample preparation nor labeling and can be coupled to other techniques (multimodality). Finally, it is again unique because it provides quantitative measurements, thus suitable for 1D to 4D data exploitation procedures. This short review shows that IR spectroscopy will be certainly subjected to a second century of innovations, maintaining its influence in the panorama of cutting-edge analytical techniques.
Źródło:
Acta Physica Polonica A; 2016, 129, 2; 255-259
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Studies on Isotope Shift Exponent and Pressure Coefficient for Extended Superconductors within BCS Formalism
Autorzy:
Banerjee, B.
Roy, S.
Powiązania:
https://bibliotekanauki.pl/articles/1808029.pdf
Data publikacji:
2009-05
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
74.20.+f
74.25.Bt
74.25.Ha
Opis:
A tight-binding model comprising a hopping and an attractive interaction term was considered for high temperature superconductors. Explicit calculations on the effects of isotopic substitution of atoms and application of pressure on the transition temperatures were made in this work. Exact analytical expressions for the isotope-shift exponent (α) and pressure coefficient $(γ_P)$ of transition temperature $(T_C)$ considering the isotopic mass and pressure dependence of the hopping and attractive interaction strengths from a minimal model describing superconductivity were obtained. Theoretical predictions for α and $γ_P$ with proper choice of parameters are found to be qualitatively consistent with the results of the experiments of high $T_C$ oxides. The results depend on the band dispersion chosen.
Źródło:
Acta Physica Polonica A; 2009, 115, 5; 914-919
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Effect of Blending Methodologies on Cotton Mélange Yarn Quality
Wpływ metod mieszania na jakość melanżowych przędz bawełnianych
Autorzy:
Ray, S.
Ghosh, A.
Banerjee, D.
Powiązania:
https://bibliotekanauki.pl/articles/233799.pdf
Data publikacji:
2018
Wydawca:
Sieć Badawcza Łukasiewicz - Instytut Biopolimerów i Włókien Chemicznych
Tematy:
blow room blending
draw frame blending
fibre breakage
melange yarn
shade depth
yarn quality
mieszanie
rozdmuchiwanie
przeciąganie
łamanie włókien
przędza melanżowa
głębokość odcienia
jakość przędzy
Opis:
Fibre of dyed mélange yarn is becoming an emerging product in the field of textiles. The quality of mélange yarn is largely influenced by the types of blending methodologies. There exists hardly any reported work where the effect of blending methods on cotton mélange yarn quality has been studied. The purpose of this paper is to investigate the effect of blending methodologies on the properties of cotton mélange spun yarn. Dyed and grey cotton fibre components were mixed at the blow room and draw frame stages separately to produce mélange yarns with three different shade depths (%). Better yarn quality with respect to yarn evenness, imperfections, tenacity, elongation at break and hairiness index was achieved with the draw frame blending methodology as compared to the blow room blending methodology. The mélange yarn quality deteriorates with an increase in shade depth (%) for both blending methodologies.
Włókna z barwionej przędzy melanżowej stają się obecnie znaczącym produktem w obszarze produkcji tekstyliów. Na jakość przędzy melanżowej w dużej mierze wpływają rodzaje metod mieszania. Niewiele jest doniesień na temat wpływu metody mieszania na jakość przędz bawełnianych. Celem artykułu było zbadanie wpływu metod mieszania na właściwości przędzionej przędzy z mieszanki bawełny. Włókna bawełniane mieszano tak, aby wytworzyć melanżowe włókna o trzech różnych głębokościach odcieni (%). Oceniono jakość przędzy w odniesieniu do równomierności przędzy, niedoskonałości, wytrzymałości na rozciąganie, wydłużenia przy zerwaniu i wskaźnika włochatości. Stwierdzono, że jakość przędzy melanżowej pogarsza się wraz ze wzrostem głębi koloru (%) niezależnie od wybranej metody mieszania.
Źródło:
Fibres & Textiles in Eastern Europe; 2018, 5 (131); 41-46
1230-3666
2300-7354
Pojawia się w:
Fibres & Textiles in Eastern Europe
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Dose- and time-dependent micronucleus induction in peripheral erythrocytes of catfish, Heteropneustes fossilis (Bloch) by zinc
Autorzy:
Talapatra, S.N.
Banerjee, P.
Mukhopadhyay, A.
Powiązania:
https://bibliotekanauki.pl/articles/11433.pdf
Data publikacji:
2014
Wydawca:
Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:
micronucleus
peripheral blood
erythrocyte
catfish
Heteropneustes fossilis
zinc
genotoxicity
Opis:
As far as the detection of metal genotoxicity in fish is concerned, micronucleus (MN) test is considered an extremely suitable measure. In this study, frequencies of micronucleated erythrocytes were scored in peripheral blood of catfish, Heteropneustes fossilis (bloch) after acute in-vivo exposure of zinc at different concentrations (5, 10 and 30 ppm) in the laboratory condition. These three concentrations of zinc were tested at different durations such as 24h, 48h, 72h and 96h respectively. Highly significant (P < 0.001) increased values were obtained for MN frequencies in the peripheral erythrocytes of exposed fishes compared to control groups of fishes. These results confirm that dose- and time-dependent micronucleation in the peripheral erythrocytes of fish after short-term exposure to zinc could provide valuable information regarding zinc containing effluent quality and also help in genetic biomonitoring with this test model. In this context safe concentration of zinc vis-a-vis genotoxicity range could be evaluated for future studies.
Źródło:
International Letters of Natural Sciences; 2014, 04
2300-9675
Pojawia się w:
International Letters of Natural Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Socio-environmental survey of an ecologically important hamlet of Darjeeling district, West Bengal, India
Autorzy:
Bhattacharya, S.
Ghosh, G.
Banerjee, T.
Goswami, S.
Das, P.
Powiązania:
https://bibliotekanauki.pl/articles/11842.pdf
Data publikacji:
2015
Wydawca:
Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:
socio-environmental survey
ecologically important hamlet
management
biodiversity
environment
Darjeeling district
West Bengal
India
Opis:
Forest cover in hills is essential to maintain environmental, economic and ecological balances. North Bengal accounts for 3,086 sq km (26 %) of the 11,876 sq km area of classified forests in the state, and for nearly 5,000 sq km (40 %) of all land under tree cover. Upper Chatakpur is one of the emerging ecotourism spots of north Bengal, located at an altitude of 7887 feet in Darjeeling district. It is a 180 years old ethnic village with 19 houses and a population of about 89, and at an altitude of 7887 ft. It is about 8 km. from Sonada (26° 57' N, 88° 16' E), 22 km. from Darjeeling (26° 2' N, 88° 15' E) and 72 km. from Siliguri (26° 42' N, 88° 25' E). Upper Chatakpur Village situated within Senchal Wildlife Sanctuary, Darjeeling. The sanctuary with an area of 38.88 sq. km has an elevation of 1500-2600 m. The survey work was done in December, 2014 by visiting upper Chatakpur village and the primary data were gathered through field survey and direct contact with common people and authorized centers of the region. Surveys on the topography, demography, agriculture, livestock, water management, education, culture, health, waste management, transport, biodiversity, human animal conflict were done in this area. Medicinal plant diversity was studied in the village area and information was gathered from the local forest department centre. Information regarding the transport system was collected from the local transport office and syndicate. Census report was collected from the Sonada Panchayat Office. Health and education information was collected from the local primary school and the local sub health centre. Information on sustainable agricultural practices and waste management policies is collected through surveys in the village houses and agricultural fields. Biodiversity of Senchal Wildlife Sanctuary was documented by visiting the forest areas. Pictorial documentation was done in every phase of study. In spite of getting so much attention in the recent time, the village is not adequately developed. There is an urgent need for implementing sustainable management systems in the areas for the betterment of the socio-environmental structures. Some of the possible management strategies have been suggested for maintaining the social, environmental, economic and ecological balance of the region.
Źródło:
International Letters of Natural Sciences; 2015, 06
2300-9675
Pojawia się w:
International Letters of Natural Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Behavioural toxicology of midge larvae Chironomous sp. after acute in situ exposure of different industrial effluents and drinking water
Autorzy:
Bhunia, D.
Sarkar, S.
Banerjee, K.
Nandy, A.
Talapatra, S.N.
Powiązania:
https://bibliotekanauki.pl/articles/11385.pdf
Data publikacji:
2014
Wydawca:
Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:
behavioural activity
toxicology
midge
larva
Chironomus
in situ exposure
industrial effluent
drinking water
Opis:
Behavioural activities in relation to toxicological aspects involve behavioural changes of aquatic organisms under the exposure of a contaminant. The present study aims to know behavioural activities of midge larvae Chironomus sp. at the in-situ acute exposure of different chemicals containing wastewater viz. lead-acid battery industrial effluent, mixed industrial effluent and fresh tap water (chlorinated) as drinking water in comparison to control (dechlorinated) water sample (aged tap water). The Chironomus larvae were kept in three different experimental chambers (perforated wall test vessels) with the exposure of different water samples. These samples were made with no dilution, 50 % dilution, 2.5 % dilution and control water sample. The behavioral activities for larvae of Chironomus sp. were measured at 0h, 2h, 24h and 48 h in in-situ condition. The behavioral activities viz. crawling, looping, ventilation, paralyses and subsequently death of the larvae were recorded in the field condition. A significant differences (P < 0.05, P < 0.01 and P< 0.001) were observed with increasing time of exposure while in few cases the data were increased without significance level. It was recorded that after exhibiting behavioural activities viz. crawling, looping, ventilation and paralyses finally all species were died 100 % of the population in lead acid battery effluent following both 24h and 48hr exposure. In addition, death of larvae were 70 % in mixed industrial effluent and 50 % in fresh tap water (chlorinated) after 48h exposure as compared to control sample water. In conclusion, the present results indicate that the larvae of Chironomous sp. are suitable indicators in the evaluation of the effluent quality in the studied stream, potential to know by behavioural toxicological study for heavy metals and organic pollution. Although it is a preliminary observation by assessing behavioural toxicology but future study in relation to biochemical and genetic damage of Chironomous larvae with the exposure of toxic water samples will provide bigger view.
Źródło:
International Letters of Natural Sciences; 2014, 14
2300-9675
Pojawia się w:
International Letters of Natural Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A study on the occurrence of Asian open bill stork, Anastomus oscitans in particular tree species at Nature Park, Kolkata, India
Autorzy:
Das, A.
Sarkar, S.
Banerjee, K.
Nandy, A.
Talapatra, S.N.
Swarnakar, S.
Powiązania:
https://bibliotekanauki.pl/articles/11152.pdf
Data publikacji:
2014
Wydawca:
Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Opis:
The trees support many bird and animal species while the survival of urban-dwelling species e.g. bird species dominate over others. This particular Nature park in Kolkata is the habitat of birds and fish species suggesting a better environment for food chain maintenance. The Asian open bill stork, Anastomus oscitans among other bird species is a common and provides ecosystem health indicator. The present study aims to understand the occurrence and population nos. of Asian open bill stork on particular tree species surrounding wetlands at Nature Park, Kolkata, India. Our results clearly indicate that a total population of this bird species having 671 nos. on the particular trees but not in all other available trees in the study area. In conclusion, present research emphasizes a novel occurrence and higher population of the A. oscitans being observed on the basis of the presence of particular tree species, though no attempt has been made on physico-chemical properties of present water and microclimate within the park. Therefore, further research planning should be oriented considering the physico-chemical impacts as well as local microenvironment along with human interaction as visitors in such a way so that these barriers cannot affect nesting and breeding of those species as eco-indicator. Also further relevant research is needed to emphasize on the conservation of these specific tree species to increase population of Asian open bill stork, A. oscitans in Nature park.
Źródło:
International Letters of Natural Sciences; 2014, 22
2300-9675
Pojawia się w:
International Letters of Natural Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Biomonitoring of river Ganga bank by identifying mollusc species as an indicator
Autorzy:
Gupta, K.
Nandy, A.
Banerjee, K.
Talapatra, S.N.
Powiązania:
https://bibliotekanauki.pl/articles/10869.pdf
Data publikacji:
2015
Wydawca:
Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Opis:
The present study deals with biomonitoring to know mollusc species as an indicator. In the present study, presence, absence and abundance of particular gastropod and bivalve species were identified in the different banks of river Ganga. The study was carried out at two experimental sites, Sodepur (Exp-1) and Khardah (Exp-2), West Bengal, India as the area exhibits a major sewage water outfall in the river compared with upstream control site, Kalyani (Cont-1) and downstream control site, Batanagar (Cont-1). The present biomonitoring shows qualitatively and quantitatively that in experimental no mollusc species were observed near the wastewater discharge area into the bank of river Ganga at Khardah while both sites of the sewage discharge area into the bank of river Ganga at Sodepur particular gastropod Bellamya sp. were observed when compared to control area. The highest variety and total nos of gastropods and bivalves (280 nos) were recorded in the upstream at Kalyani and lowest variety and total nos of only gastropods (150 nos) were recorded in the downstream at Batanagar. The present biomonitoring work was a preliminary observation to know sensitive and tolerant or accumulator mollusc species in the bank of river Ganga from a stretch of Kalyani (upstream) to Batanagar (downstream) in between urban wastewater discharge area (Sodepur and Khardah). Further researches must be relevant in relation to biomarker assessment with the physico-chemical factors and stress tolerant detoxification mechanism of particular mollusc species.
Źródło:
International Letters of Natural Sciences; 2015, 37
2300-9675
Pojawia się w:
International Letters of Natural Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Impact of geoenvironmental hazards on ground water and human health: the mechanism and management
Wpływ geośrodowiskowych zagrożeń na wody gruntowe i zdrowie ludzkie: mechanizm i zarządzanie
Autorzy:
Sarkar, M.
Manna, S.
Banerjee, A.
Pramanick, P. P.
Powiązania:
https://bibliotekanauki.pl/articles/1826184.pdf
Data publikacji:
2004
Wydawca:
Politechnika Koszalińska. Wydawnictwo Uczelniane
Tematy:
wody gruntowe
zagrożenia geośrodowiskowe
zanieczyszczenie wód guntowych
Opis:
Management and protection of the ground water is most important, since ground water is considered as the most precious resource in the earth. Once this vital resource is contaminated it will cause several ecological disturbances. In recent years the large-scale occurrence of ground water contamination by some inorganic pollutants like arsenic and fluoride and the associated human sufferings is a threat of this millennium. The severity, magnitude and spread of such problem over the world have reached at an alarming stage (1,2). The source of contamination of ground water is primarily geogenic in origin, with some anthropogenic activities accelerating the problem. The actual mechanism of leaching of the contaminants from the parent minerals to the aquifers is not understood. Still it is clear that indiscriminate use of ground water definitely aggravate the problem. It is estimated that at least sixty four million people in the world are suffering from fluoride related health problem (3) and more than four million people in India, in the state of West Bengal alone (4) are developed the symptom of arsenic toxicity. Both arsenic and fluoride are widely distributed throughout the earth's crust and are introduced into ground water through the dissolution of minerals and ores as well as a result of erosion from local rocks. Industrial effluents also contribute arsenic and fluoride to water in some areas. Arsenic and fluoride are also used commercially, e.g., in alloying agents and wood preservatives. Combustion of fossil fuels is a source of the contaminations in the environment through disperses atmospheric deposition. Arsenic and fluoride from water, sediment, soil and rocks can concentrate in living organisms. Among the different sources of contaminations the pollution of ground water through geological sources are very crucial. The complex pathway and mobilization pattern make the situation very critical. Fluoride and Arsenic poisoning can be prevented or at least minimized by use of alternative water sources and treated water after removal of fluoride and arsenic. Surface water, rainwater and fluoride/arsenic free ground water can be considered as alternative water sources. Among the conventional removal techniques precipitation, adsorption, ion exchange, electrolysis and reverse osmosis can be used. In our laboratory we tested some low cost waste material (viz. fly ash from thermal power plant) and natural material (laterite, the widely available clay in India) for the removal of arsenic and fluoride from contaminated drinking water.
Ostatnie sprawozdania pokazują, że około 26 krajów jest dotkniętych problemem zanieczyszczenia wód gruntowych arsenem, wśród których cztery kraje południowo azjatyckie: Bangladesz, Indie (Zachodni Bengal), Chiny i Tajwan są najbardziej zagrożone. Obecnie w 29 krajach na świecie występuje problem zanieczyszczenia wód gruntowych fluorem pochodzącym tylko ze źródeł geośrodowiskowych. Wpływ na zdrowie przypadku obu tych zanieczyszczeń jest bardzo poważny, a skutki są nieodwracalne i praktycznie nie istnieje żadna kuracji mogąca wyleczyć zakażone osoby. W Indiach bardzo duża populacja cierpi z powodu zatrucia arsenem i fluorem. Ostatnie badania przeprowadzone przez UNICEF wskazują, że co najmniej 213 okręgów w 18 stanach (w tym cztery okręgi Zachodniego Bengalu), jest dotknięte tym problemem. Skala problemu zanieczyszczenia arsenem w Zachodnim Bengalu jest bardzo poważna w dziewięciu okręgach z pośród osiemnastu. Średnia wysokiego stężenia arsenu jest 4,5 razy przekracza wartość tolerowaną przez ludzkie ciało (0,05 mg/L, norma w Indiach). W niektórych miejscach wartość ta przekroczona jest nawet siedmiokrotnie. Najwyższe oznaczone stężenie fluoru w wodzie gruntowej w Zachodnim Bengalu wynosiło 19 mg/L (maksymalna dopuszczalna wartość wg WHO to 0,5 mg/). Największe stężenie fluoru w wodzie gruntowej w Indiach oznaczono w miejscowości Haryana i wynosiło ponad 84 mg/L. Nasze badania we wsiach Nashipur, Bhabanandapur, Nowapara, Chakatla, Junidpur w dzielnicy Rampurhat, okręgu Birbhum, Zachodni Bengal pokazują największe stężenie fluoru wynoszące 16,0 mg/L (prawie 16 razy większe niż granicę dopuszczalną przez WHO). Na terenie badań prawie 90% dzieci w grupie wiekowej poniżej 15 lat posiada rozwinięte symptom fluorozy dentystycznej. W typowych badaniach około 21 000 próbek włosów, paznokci, naskórka i moczu (tylko metabolity arsenu zostały zmierzone) mieszkańców terenów skażonych arsenem zostało zanalizowanych na zawartość arsenu. Około 10÷15% z tych próbek pochodzi od ludzi mających uszkodzenia skóry spowodowane przez arsen. 56%, 80% i 87% z analizowanych próbek zawiera arsen we włosach, paznokciach i moczu w ilościach przekraczających poziom normalnym / toksyczny (włosy).
Źródło:
Rocznik Ochrona Środowiska; 2004, Tom 6; 51-62
1506-218X
Pojawia się w:
Rocznik Ochrona Środowiska
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Effect of increasing graded doses of formaldehyde on human embryonic kidney cells
Autorzy:
Banerjee, A.
Dholey, M.
Mukherjee, S.
Maji, B.K.
Powiązania:
https://bibliotekanauki.pl/articles/1918635.pdf
Data publikacji:
2018-06-18
Wydawca:
Uniwersytet Medyczny w Białymstoku
Tematy:
Formaldehyde
human embryonic kidney cells
high and low dose
Opis:
Purpose: In the present study, we aimed to identify the effect of three increasing doses of most widely preservative, formaldehyde (FA) on the urinary system using human embryonic kidney cells (HEK-293) in vitro. Materials and methods: The HEK-293 cells were grown in Dulbecco’s Modified Eagle medium (DMEM, Gibco, USA) supplemented with 10% of fetal bovine serum, 100 IU/ml penicillin and 100 μg/ml of streptomycin (Gibco, USA) using 25cm2 flasks (Nunc, Denmark), in a CO2 incubator (Heal Force) at 37°C are treated with 19 % formaldehyde in DMEM supplemented with 10% of fetal bovine serum to yield final concentrations of 0.05 μl/ml, 0.1 μl/ml, 0.5 μl/ml and 1.0 μl/mlof 19% FA. Results: The result showed that statistically significant dose dependent decrease in cell viability of HEK-293 cells with exposure to increasing concentration of FA (0.05 μl/ml, 0.1 μl/ml, 0.5 μl/ml and 1.0 μl/ml) on MTT assay. Extremely huge dose dependent DNA damage with a dose dependent up regulation of mRNA expression of pro-apoptotic iNOS and TNF- gene was observed when HEK-293 cells are treated with the increasing concentration of FA. In addition, the protein expression levels of Bcl-2 and Bax revealed that increasing concentration of FA on HEK-293 cells down regulated the anti-apoptotic Bcl-2 and up regulated pro-apoptotic Bax gene. Conclusions: Our result indicates that, high dose of FA is more dangerous than the low dose on HEK-293 cells with cellular damage.
Źródło:
Progress in Health Sciences; 2018, 8(1); 36-45
2083-1617
Pojawia się w:
Progress in Health Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Can physical training minimize the gender differences in lung capacity of trained tennis players aged 14-17 years old?
Autorzy:
Pandit, N.
Banik, S.
Prasad, S.K.
Majumdar, P.
Banerjee, O.
Bandyopadhyay, A.
Powiązania:
https://bibliotekanauki.pl/articles/1795.pdf
Data publikacji:
2018
Wydawca:
Uniwersytet Opolski. Instytut Nauk o Zdrowiu
Tematy:
male
female
lung capacity
sport
tennis player
gender difference
physical training
tennis
Opis:
Background: This study was based on gender differences in male and female trained tennis players. Aim of the study: The aim of this study was to determine the extent that physical training could minimize the gender differences in lung capacities in trained tennis players aged 14–17 years. Material and methods: The participants were ten male and seven female lawn tennis players, with a mean ± standard deviation (SD) age of 15.5 ± 1.27 and 14.43 ± 1.13 years, respectively. Physical characteristics and lung volumes were measured on the same day for each participant. Data were presented as mean ± SD, and Student’s t-test to compare the measured variables was performed. Results: Differences between genders were insignificant in terms of age (years), weight (kg), body fat (%), lean body mass (kg) and chest circumference (cm). However, height (cm), and W/H ratio were significantly (p < 0.05) higher in male tennis players in comparison to female players. Insignificant differences were found for TV (L), SVC (L), FVC (L), FEV1 (L), FEV1/FVC (%), FEF25-75% (L/s), PEF (L/s) and MVV (L/min). The only significant difference (p < 0.05) in lung function measures between male and female trained tennis players was for PIF (L/s). Conclusions: Male tennis players were taller than female tennis players of same age range, which might be advantageous for males while playing. Insignificant differences between male and female players in the various lung variables measured indicated that the influence of height and gender differences could be minimized by proper training during puberty. A significantly higher PIF in male players indicated stronger and more powerful inspiratory muscle activity compared with female tennis players.
Źródło:
Medical Science Pulse; 2018, 12, 2
2544-1558
2544-1620
Pojawia się w:
Medical Science Pulse
Dostawca treści:
Biblioteka Nauki
Artykuł
Wyświetlanie 1-15 z 17

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