Wyniki wyszukiwania

1

Artykuł dostępny w postaci pełnego tekstu - kliknij by otworzyć plik

Physiological responses of the eustigmatophycean Nannochloropsis salina to aqueous diesel fuel pollution

100%

Nagwa Gamal-El-Din Mohammady, Chen Y.-C., Abd-El-Ruhman Aly El-Mahdy, Mohammad R. F.

Oceanologia

|

2005

|

tom 47

|

nr 1

The marine eustigmatophycean microalga Nannochloropsis (Monallantus) salina Hibberd was cultivated in a batch culture in the presence of various concentrations (0, 25, 50, 75 and 100%) of an aqueous extract of diesel fuel oil in order to assess the influence of the pollutant on the growth and certain physiological responses of the microalga. The growth data revealed a significant negative effect of the various pollutant concentrations on the algal cell number (p≤0.05). However, at the midlogarithmic growth phase (day 8), the algal cells were analysed for chlorophyll a, β-glucan, amino acid pool, C/N ratio and elemental composition. According to our results, N. salina was significantly affected by the pollution with regard to the different physiological parameters examined, and this significance may be negative, positive or variable. The effect of the pollutant on cellular β-glucan and the total amount of amino acids was negative;h owever, the composition of the cellular amino acid pool remained unaffected. A positive effect of the pollutant on cellular chl a and the C/N ratio was observed. In addition, the pollutant showed variable effects on the composition of different elements, as shown by energy-dispersive X-ray microanalysis. Also, an existence correlation between different elements was statistically reported.

2

Temperature dependence of the dielectric properties of blood

86%

Bielinska I., Terlecki J.

Folia Histochemica et Cytobiologica

|

1985

|

tom 23

|

nr 1-2

3

Effect of vesicular arbuscular mycorrhiza Glomus fasciculatum on the growth and physiological response in Sesamum indicum L.

86%

Robinson J. P., Nithya K., Ramya R., Karthikbalan B., Kripa K.

International Letters of Natural Sciences

|

2014

|

tom 18

Plant growth and physiological response of sesame (Sesamum indicum L.) were studied in controlled environment using normal soil and indigenous Vesicular-arbuscular mycorrhiza (VAM) fungi treated soil. The seedlings of Zea mays were inoculated with Giguspora species of VAM (Glomus fasiculatum) and the inoculum was multiplied with help of Zeamays seed bed. Sesame seeds were then inoculated into the bed and it was found that the plant height, shoots lengths, roots, biomass of shoot and roots were considerably increased in the mycorrhizal plants. The effect of VAM infection was assessed in pot experiment. In this comparative study, specific mycorrhizal fungi had consistent effects on various growth parameters such as the number of leaves, number of roots, shoot length, biomass of shoot and roots and biochemical parameters were observed at various time intervals by statistical analysis using two way ANOVA, it was confined with mycorrhizal and non-mycorrhizal infected plants. It was found that the ability of isolates to maintain the plant growth effectively in the case of mycorrhizal seedlings shows a maximum absorbtion of 0.77 ±0.2, shoot length is about 8.34 ±0.2, count of root and leaves are about 8.10 ±0.3, 5.6 ±0.3 respectively under mycorrhizal infection in 30days of analysis and had a positive effect on the growth at all intervals. Biochemical analysis were carried out to estimate the total chlorophyll, chrophyll A, chlorophyll B and Carotenoids contents and it was analyzed to be 9 ±0.5 mg/g, 8.3 ±0.5 mg/g, 3.6 ±0.5 mg/g, 4 ±0.3 mg/g respectively. At the 30th day of analysis for the mycorrhizal plants, it was found to be high in mycorrhizal seedlings which shows the symbiosis had improved the nutrient uptake of cultivated plants. Nevertheless G. fasiculatum was found to be the most efficient fungus and exhibited the highest levels of mycorrhizal colonization, as well as the greatest stimulation of physiological parameters.

4

Exercise-induced physiological response to effort and its effect on the welfare of sport horses

86%

Rowicka A.

|

2013

|

tom 31

|

nr 1

5

Effect of mild psychological stress on physiological responses to exercise in men

86%

Kaciuba-Uscilko H., Porta S., Nazar K., Tonderska M., Titow-Stupnicka E., Ziemba A. W., Chwalbinska-Moneta J.

Journal of Physiology and Pharmacology

|

1994

|

tom 45

|

nr 3

6

Physiological and antioxidant responses of Mentha pulegium (Pennyroyal) to salt stress

72%

Oueslati S., Karray-Bouraoui N., Attia H., Rabhi M., Ksouri R., Lachaal M.

Acta Physiologiae Plantarum

|

2010

|

tom 32

|

nr 2

Mentha pulegium L. is a medicinal and aromatic plant belonging to the Labiatae family present in the humid to the arid bioclimatic regions of Tunisia. We studied the effect of different salt concentrations on plant growth, mineral composition and antioxidant responses. Physiological and biochemical parameters were assessed in the plant organs after 2 weeks of salt treatment with 25, 50, 75 and 100 mM NaCl. Results showed that, growth was reduced even by 25 mM, and salt effect was more pronounced in shoots (leaves and stems) than in roots. This growth decrease was accompanied by a restriction in tissue hydration and K⁺ uptake, as well as an increase in Na⁺ levels in all organs. Considering the response of antioxidant enzymes to salt, leaves and roots reacted differently to saline conditions. Leaf and root guaiacol peroxidase activity showed an increase by different concentration of NaCl, but superoxide dismutase activity in the same organs showed a slight modification in NaCl-treated leaves and roots. Moreover, polyphenol contents and antioxidant activity were analysed in M. pulegium leaves and roots under salt constraint. The analysis showed an increase of total polyphenol content (2.41–8.17 mg gallic acid equivalent g⁻¹ dry weight) in leaves. However, methanol extract of leaves at 100 mM NaCl displayed the highest DPPH scavenging ability with the lowest IC₅₀ value (0.27 µg ml⁻¹) in comparison with control which exhibited IC₅₀ equal to 0.79 µg ml⁻¹ .

7

Physiological responses of energy crops to drought

72%

Choluj D., Podyma K., Rotocki M.

Acta Physiologiae Plantarum

|

2007

|

tom 29

|

nr 1 Suppl.

8

Physiological and biochemical responses of salt-tolerant and salt-sensitive wheat and bean cultivars to salinity

72%

Radi A. A., Farghaly F. A., Hamada A. M.

Journal of Biology and Earth Sciences

|

2013

|

tom 03

|

nr 1

9

Photosynthetic and physiological responses of Swida hemsleyi [C.K. Schneid. et Wangerin] Sojak [Cornaceae] subjected to enhanced UV-B radiation and to nitrogen supply

72%

Yao X., Liu Q.

Polish Journal of Ecology

|

2009

|

tom 57

|

nr 3

483-494

Atmospheric ozone remains depleted which in turn leads to the increase of UV-B radiation reaching the surface of the earth and in the same time more and more nitrogen will be imported into the terrestrial ecosystems through nitrogen deposition. These two factors will operate simultaneously. The photosynthetic and physiological responses of deciduous broad leaved species Swida hemsleyi occurring commonly at 1350–3700 m a.s.l. subjected to enhanced UV-B and to nitrogen supply were studied. The experimental design included two levels of UV-B treatments (ambient UV-B, 11.02 KJ m⁻² day⁻¹ and enhanced UV-B, 14.33 KJ m⁻² day⁻¹) and two nitrogen levels (without supplemental nitrogen supply and with supplemental nitrogen supply). An experiment was conducted in open semi-field condition in Maoxian Ecological Station of Chinese Academy of Sciences, Sichuan province, China at 1820 m a.s.l. Enhanced UV-B caused a marked decline in growth parameters, net photosynthetic rate, stomatal conductance to water vapour, chlorophyll pigments, whereas it induced an increase in rate of reactive oxygen species (ROS) production and ROS accumulation and malondialdehyde (MDA) content. Enhanced UV-B also induced an increase in leaf thickness and antioxidant compounds content, such as carotenoids and proline content. On the other hand, nitrogen supply caused an increase in some growth parameters, chlorophyll pigments and antioxidant compounds, and reduced ROS accumulation. However, nitrogen supply did not affect MDA content under enhanced UV-B, though it increased antioxidant compounds content and reduced the rate of ROS production and ROS accumulation. These results implied that enhanced UV-B brought harmful effects on Swida hemsleyi seedlings and supplemental nitrogen supply could alleviate the adverse effects of UV-B radiation on plants to some extent.

10

Biochemical and physiological responses of Eruca sativa Mill. to selected nutrient conditions

72%

Hanaka A., Dresler S., Nurzynska-Wierdak R.

Acta Scientiarum Polonorum. Hortorum Cultus

|

2016

|

tom 15

|

nr 4

The present study deals with biochemical and physiological methods for assessment of the optimal nutrient supply for the growth and development of garden rocket (Eruca sativa Mill.), edible vegetable. Two nitrate (0.3; 0.6 g N dm⁻³ of medium) and three potassium doses (0.3; 0.6; 0.9 g K dm⁻³ of medium) in the form of sulphate or chloride were examined. At the higher nitrate dose and the sulphate form of potassium the intense green colour of leaves, higher content of nitrates, flavonoids, L-ascorbic acid and lower carbohydrates content correlated with elevated growth parameters, e.g. the number of leaves and partially plant fresh weight. The proline and anthocyanin contents weakly diversified the nutrient supply. Despite the lack of modification in the photosynthetic pigment concentration, the chlorophyll fluorescence parameters were significantly improved when the higher nitrate dose accompanied the sulphate form of potassium (higher values of fluorescence decrease, maximum quantum efficiency of PSII photochemistry in the dark-adapted state, photochemical quenching and lower values of the fraction of absorbed light energy not used for photochemistry). The biochemical and photosynthetic parameters corresponding to the morphological characteristics (leaf colour, number of leaves and plant fresh weight) indicated that better nutrient conditions were provided to plants under the combined fertilization of the higher nitrate dose and the sulphate form of potassium.

11

Temperature distribution in rheumatoid hand after standard infrared treatment

72%

Rutkowski R., Straburzynska-Lupa A., Korman P., Romanowski W., Raglewska P., Konarska A., Gizinska M., Hurnik E., Czubaszewski L.

Trends in Sport Sciences

|

2013

|

tom 20

|

nr 1

Introduction. Comprehensive therapy of rheumatoid arthritis (RA), apart from pharmacological treatment, also necessitates an implementation of specialized procedures aimed at improving the mobility, stamina and strength of affected joints. Physical treatments used for the rehabilitation of patients with RA are most often related to thermal stimuli and change the temperature of the tissues. Each change of that kind is linked to the adequate vascular reaction and the changes in blood circulation within the affected area. Aim of the Study. The aim of this present study was to examine vascular changes in rheumatoid hand occurring as a physiological response to the mild thermal stimulus being applied, accounting for individual differences in its progress. Material and Methods. The research embraced 32 patients aged 54.9 ± 6.8 with diagnosed RA according to the standards of American College of Rheumatology. For physical therapy a conventional infrared lamp emitting A, B, C waves with a red colour filter was used. The area under treatment was the dorsal side of the hand. Each subject had eight thermographic pictures taken at the pre-defined time intervals: before the application, immediately after the application, and 5, 15, 30, 45, 60 and 120 minutes after the application. Results. The results were shown in a form of graphic reaction progress of the heated and unheated (contralateral) hand. Average static temperatures of both hands did not show any differences (31.8 ± 1.7°C – heated hand; 31.9 ± 1.8°C – unheated hand). Maximum temperature was obtained immediately following the IR lamp application: 35.0 ± 1.2°C for the heated hand and 32.2 ± 2.1°C for the unheated one. Among all analyzed diagrams showing reaction progress following IR application, four individual groups with the most similar results were formed. Conclusions. For all the patients in the study, a comparable decrease in tissue temperature initially increased by IR application was noted within the next 45 minutes following the application. No subject observed any undesirable reactions.

12

Physiological response of the small intestine and caecum of rats to saccharose substitution with fructooligosaccharides in diets with a different content of protein, fat and cholesterol

58%

Wroblewska M., Juskiewicz J., Brzuzan L., Zdunczyk Z.

Polish Journal of Natural Sciences. Supplement

|

2006

|

tom 03

593-600

13

Role of antioxidant enzymes in amelioration of water deficit and waterlogging stresses on Vigna sinensis plants

58%

El-Enany A. E., Al-Anazi A. D., Dief N., Al-Taisan W. A.

Journal of Biology and Earth Sciences

|

2013

|

tom 03

|

nr 1

14

The differences in physiological responses, ultrastructure changes, and Na plus subcellular distribution under salt stress among the barley genotypes differing in salt tolerance

58%

Jabeen Z., Hussain N., Han Y., Shah M. J., Zeng F., Zeng J., Zhang G.

Acta Physiologiae Plantarum

|

2014

|

tom 36

|

nr 09

Plants adopt several strategies to maintain cellular ion homeostasis, including physiological, biochemical, cellular, subcellular, and molecular mechanisms for fighting against salt stress. We investigated the responses of tolerant Tibetan wild barley (XZ16), tolerant (CM72) and sensitive (Gairdner) barley cultivars at physiological, cellular, and molecular levels. The results revealed that salinity induced a significantly greater reduction in total root length, surface area, diameter, and total volume in Gairdner than in CM72 and XZ16. Analysis of gene expression using quantitative RT-PCR showed that transcripts of vacuolar H⁺-ATPase and inorganic pyrophosphatase (HvHVA/68 and HvHVP1) were more abundant in leaves and roots of XZ16 and CM72 than those of Gairdner. Observation of electron microscopy detected the difference in the damage of leaf and root ultrastructure among the three genotypes under salt stress, with XZ16 and Gairdner being least and most affected, respectively. Subcellular study showed that a primary strategy to protect the cytosol against sodium toxicity was compartmentalization of sodium ions into soluble fraction (vacuoles). Gairdner showed drastically stronger sodium-specific fluorescence visualized by CoroNa-Green, a sodium-specific fluorophore, than CM72 and XZ16.

15

Physiological response of in vitro cultured Magnolia sp. to nutrient medium composition

58%

Sokolov R. S., Atanassova B. Y., Iakimova E. T.

Journal of Horticultural Research

|

2014

|

tom 22

|

nr 1

16

Physiological activity of common osier (Salix viminalis L.) under copper-induced stress conditions

58%

Malinowska K., Wrobel J.

Acta Agrophysica

|

2015

|

tom 22

|

nr 2

The study examined the influence of copper salt at concentrations ranging from 50 to 250 mg dm-3 on the physiological reaction of the Bjor and Jorr varieties of common osier. The content of assimilation pigments, the intensity of CO2 assimilation, transpiration, stomatal conductance for CO2 and water vapour, coefficients of the relative water content and water saturation deficit were determined. The intensity of CO2 assimilation, transpiration and the assimilation pigment content in the tested common osier cultivars varied with relation to the copper salt dose in the medium. A decrease in the intensity of the tested physiological parameters was found together with an increase in the copper salt dose in the medium. CO2 assimilation and transpiration of the Bjor and Jorr osier was significantly limited by the stomata. The addition of copper salts to the medium resulted in an increase in the water saturation deficit in leaves of the tested common osier varieties.

17

Physiologic, metabolic and mediator responses in posttrauma ards and sepsis; is oxygen debt a critical initiating factor?

58%

Siegel J. H.

Journal of Physiology and Pharmacology

|

1997

|

tom 48

|

nr 4

18

Physiological responses of the germinated seeds to the toxic activity of copper

58%

Grzesik M., Romanowska-Duda Z.

Biological Letters

|

2005

|

tom 42

|

nr 2 Spec.Vol.

19

Effects of zearalenone and product Toxy-Nil Plus Dry on physiological responses of boar semen

58%

Kutra J., Siukscius A., Urbsys A., Pileckas V., Nainiene R., Mankeviciene A.

Medycyna Weterynaryjna

|

2006

|

tom 62

|

nr 01

The aim of the present study was to determine the effects of the mycotoxin zearalenone as well as the detoxicating product Toxy-Nil Plus Dry (TNPD) on the quality of boar semen. Thirteen Lithuanian White boars, 10 months of age and weighing 150 to 155 kg were used in the experiment and allotted to three groups. Every boar was offered 6 kg of compound feed containing 78% of barley meal and 22% of protein-vitamin-mineral premix (PVMP). Boars in the experimental groups were given feed containing zearalenone (0.57 mg/ /kg) for 32 days and detoxicated (1 kg TNPD per 1000 kg of feed) feeds. In a week following the administration of zearalenone-containing feeds to the boars, the volume of ejaculation had decreased by 40.8 % (P < 0.005) compared with the control group. The lowest initial spermatozoa motility in the semen collected during intoxication was determined in the group of boars receiving zearalenone-containing feed (3.9 ± 1.79 points, P = 0.01). On replacement of the contaminated feed, the motility of spermatozoa recovered within a week and amounted to 7.0 ± 0.55 points. The negative effect of TNPD on spermatozoa was noted during the recovery period. The total quantity of pathologic spermatozoa in a corresponding experimental group increased to 33.2 ± 8.75% compared with 21.7 ± 8.27% (P < 0.05) in the pre-experimental period. The study indicated that the investigated level of zaeralenone in feed negatively affects the reproductive performance of boars. The unhealthy effect of zearalenone may be significantly reduced by treating contaminated feeds with TNPD.

20

Effects of genetic group x ambient temperature interactions on performance and physiological responses of Naked-neck chickens and their F1 crosses with Lohmann White and New Hampshire laying hens

51%

Melesse A., Maak S., von Lengerken G.

Journal of Animal and Feed Sciences

|

2011

|

tom 20

|

nr 4

Ograniczanie wyników

Physiological responses of the eustigmatophycean Nannochloropsis salina to aqueous diesel fuel pollution

Temperature dependence of the dielectric properties of blood

Effect of vesicular arbuscular mycorrhiza Glomus fasciculatum on the growth and physiological response in Sesamum indicum L.

Exercise-induced physiological response to effort and its effect on the welfare of sport horses

Effect of mild psychological stress on physiological responses to exercise in men

Physiological and antioxidant responses of Mentha pulegium (Pennyroyal) to salt stress

Physiological responses of energy crops to drought

Physiological and biochemical responses of salt-tolerant and salt-sensitive wheat and bean cultivars to salinity

Photosynthetic and physiological responses of Swida hemsleyi [C.K. Schneid. et Wangerin] Sojak [Cornaceae] subjected to enhanced UV-B radiation and to nitrogen supply

Biochemical and physiological responses of Eruca sativa Mill. to selected nutrient conditions

Temperature distribution in rheumatoid hand after standard infrared treatment

Physiological response of the small intestine and caecum of rats to saccharose substitution with fructooligosaccharides in diets with a different content of protein, fat and cholesterol

Role of antioxidant enzymes in amelioration of water deficit and waterlogging stresses on Vigna sinensis plants

The differences in physiological responses, ultrastructure changes, and Na plus subcellular distribution under salt stress among the barley genotypes differing in salt tolerance

Physiological response of in vitro cultured Magnolia sp. to nutrient medium composition

Physiological activity of common osier (Salix viminalis L.) under copper-induced stress conditions

Physiologic, metabolic and mediator responses in posttrauma ards and sepsis; is oxygen debt a critical initiating factor?

Physiological responses of the germinated seeds to the toxic activity of copper

Effects of zearalenone and product Toxy-Nil Plus Dry on physiological responses of boar semen

Effects of genetic group x ambient temperature interactions on performance and physiological responses of Naked-neck chickens and their F1 crosses with Lohmann White and New Hampshire laying hens