Wyniki wyszukiwania - AGRO

1

Dynamics of the submembrane contractile system in caffeine-derived protoplasmic droplets of Physarum polycephalum

100%

Kolodziejczyk J., Grebecki A.

Acta Protozoologica

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1989

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tom 28

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nr 1

2

Effect of caffeine on spermatogenesis in Chara vulgaris L.

100%

Jaros K., Maszewski J.

Acta Biologica Cracoviensia. Series Botanica et Zoologia. Supplement

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1997

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tom 39

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nr 1

3

The pinocytosis in the thermic hyalospheres of amoeba proteus and caffeine-induced microplasmodia of physarum polycephalum

86%

Grebecki A., Kolodziejczyk J., Kwiatkowska E. M.

Postępy Biologii Komórki

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1989

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tom 16

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nr 1

4

Influence of grinding on chemical composition of coffee brew and spent coffee extracts

86%

Monente C., Bravo J., Paz de Pena M., Cid C.

Polish Journal of Food and Nutrition Sciences

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2011

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tom 61

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nr Suppl.1

5

The ultrastructure of the chicken embryonal cornea and lens after caffeine administration

86%

Kujawa-Hadrys M., Tosik D., Bartel H.

Acta Biologica Cracoviensia. Series Botanica. Supplement

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2008

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tom 50

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nr 1

6

The authenticity of the selected coffee brands available on Tricity market

86%

Dmowski P., Smiechowska M., Pawlowska S.

Towaroznawcze Problemy Jakości. Polskie Towarzystwo Towaroznawcze

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2018

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nr 3

7

Mitotic activity as an early symptom of flower evocation in Pharbitis nil Chois

86%

Czaplewska J., Kopcewicz J.

Acta Physiologiae Plantarum

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1994

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tom 16

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nr 1

8

Effect of caffeine on the development of prothallia and antheridia in Anemia phyllitidis

86%

Ambrozek A., Maszewski J., Kazmierczak A.

Acta Biologica Cracoviensia. Series Botanica et Zoologia. Supplement

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1997

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tom 39

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nr 1

9

Artykuł dostępny w postaci pełnego tekstu - kliknij by otworzyć plik

Inhibitory effect of caffeine on diploidization and sporulation in fisson yeast Schizosaccharomyces pombe

86%

Bien M., Lachowicz T. M., Orlowska-Matuszewska G.

Polish Journal of Food and Nutrition Sciences

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1993

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tom 02

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nr 3

10

Inhibition study of adenosine deaminase by caffeine using spectroscopy and isothermal titration calorimetry

86%

Saboury A. A., Divsalar A., Ataie G., Amanlou M., Moosavi-Movahedi A. A., Hakimelahi G. H.

Acta Biochimica Polonica

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2003

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tom 50

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nr 3

Kinetic and thermodynamic studies were made on the effect of caffeine on the activity of adenosine deaminase in 50 mM sodium phosphate buffer, pH 7.5, using UV spectrophotometry and isothermal titration calorimetry (ITC). An uncompetitive inhibition was observed for caffeine. A graphical fitting method was used for determination of binding constant and enthalpy of inhibitor binding by using isothermal titration microcalorimetry data. The dissociation-binding constant is equal to 350 uM by the microcalorimetry method, which agrees well with the value of 342 uM for the inhibition constant that was obtained from the spectroscopy method. Positive dependence of caffeine binding on temperature indicates a hydrophobic interaction.

11

Influence of some psychotropic drugs on the ethanol elimination by the isolated liver of rats chronically fed with ethanol

72%

Rajtar G., Kleinrok Z.

Acta Physiologica Polonica

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1990

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tom 41

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nr 7

Rajtar G. and Kleinrok Z.: Influence of some psychotropic drugs on the ethanol elimination by the isolated liver of rats chronically fed with ethanol. Acta Physiol. Pol. During a 4-week period the rats received ethanol (EtOH), as their only drinking fluid, in a concentration ranging from 6% to 20%. In the period of 72 hours after EtOH withdrawal the rats received diazepam (DZP), imipramine (IMI) or caffeine (CAFF) i.p. twice a day in a 12-hours interval. In the experiments carried out on the livers isolated from these rats, we observed the diminution of the rate of EtOH elimination from the perfusate by the livers of DZP and IMI treated rats. CAFF did not change the rate of EtOH elimination.

12

Zawartosc kofeiny w wybranych napojach kawowych w proszku

72%

Bialas M., Luczak H., Przygonski K.

Bromatologia i Chemia Toksykologiczna

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2009

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tom 42

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nr 3

426-430

13

RP-HPLC and transcript profile indicate increased leaf caffeine in Coffea canephora plants by light

72%

Kumar A., Simmi P. S., Naik G. K., Giridhar P.

Journal of Biology and Earth Sciences

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2015

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tom 05

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nr 1

14

School pupils and university students surveyed for drinking beverages containing caffeine

72%

Gornicka M., Pierzynowska J., Kaniewska E., Kossakowska K., Wozniak A.

Roczniki Państwowego Zakładu Higieny

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2014

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tom 65

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nr 2

Background. Caffeine is a commonly found ingredient in many beverages. Its main dietary source is coffee, cola drinks and in recent years, energy drinks. Objectives. To compare the consumption of drinks containing caffeine (coffee, colas and energy drinks) and the reasons and circumstances under which they were drunk by middle school (junior high school) pupils and university students. Material and methods. Surveyed subjects were 90 middle school pupils from Warsaw and Kutno together with 100 students attending the Warsaw University of Life Sciences (SGGW). A questionnaire, designed by the authors, was used to determine the amounts, frequency and the reasons or circumstances in which coffee, colas and energy drinks were consumed. Statistics used, consisted of the Mann-Whitney U and Chi-square (χ2) tests, with significance taken as α ≤ 0.05. Results. Cola drinks were found to be the most popularly consumed beverages containing caffeine; 97% pupils and 93% students. Coffee was however drunk twice less by pupils compared to students, whilst similar amounts of energy drinks were consumed by both groups; respectively 48% and 53%. Gender differences were observed for the energy drinks with young men drinking the most. Coffee and energy drink consumption also rose with age by respectively 39% and 57%. The mean caffeine intake in pupils and students were respectively estimated to be 141 and 163 mg/day(d). The reasons why these beverages were drunk varied, from drinking coffee to keeping awake and drinking cola because of its good taste. Pupils also drank energy drinks due to its taste but students because of improved mental performance and in staying awake. Conclusions. Drinking caffeine containing drinks by adolescents can be very variable and comes from many different sources. Thus, its intakes may be very high and so require monitoring, particularly for the youngest. Further observational studies are needed to assess the consumption of energy drinks in relation to physical activity.

15

Use of X-ray microprobe to diagnose bone tissue demineralization after caffeine administration

72%

Tomaszewski M., Olchowik G., Tomaszewska M., Burdan F.

Folia Histochemica et Cytobiologica

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2012

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tom 50

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nr 3

16

The effects of short-time caffeine administration on skeleton development in Wistar rats

72%

Burdan F., Madej B., Wojtowicz Z., Maciejewski R., Radzikowska E.

Folia Morphologica

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2000

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tom 59

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nr 2

17

Effect of hydrocolloids on perception of bitterness and astringency in model system

72%

Troszynska A., Narolewska O., Wolejszo A.

Polish Journal of Food and Nutrition Sciences

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2007

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tom 57

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nr 3[A]

The influence of food gums (guar, xanthan, arabic) and carboxymethylcellulose (CMC) on bitterness and astringency of caffeine and tannic acid has been studied. The study was performed in critical concentrations (c*) for particular hydrocolloids as well as for values above and below c*. The ability of hydrocolloids to reduce the astringency and bitterness was evaluated using the method of taste indicator and expressed as a percentage of unreduced sensation. The results indicated that the ability of hydrocolloids to mask the astringency and bitterness was differential and depended both on the concentration and the type of the hydrocolloids used. CMC indicated the highest ability to mask bitterness and astringency among the hydrocolloids. It was found that the ability of these polymers to reduce the astringency was increasing above the c* concentrations.

18

Methylxanthines [caffeine, pentoxifylline and theophylline] decrease the mutagenic effect of daunomycin, doxorubicin and mitoxantrone

72%

Piosik J., Gwizdek-Wisniewska A., Ulanowska K., Ochocinski J., Czyz A., Wegrzyn G.

Acta Biochimica Polonica

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2005

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tom 52

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nr 4

Previously performed experiments showed that methylxanthines, especially caffeine, may protect cells against cytostatic or cytotoxic effects of several aromatic compounds. One of the proposed mechanisms of this protection is based on stacking interactions between π electron systems of polycyclic aromatic molecules. In this work, we demonstrate that caffeine and other methylxanthines - pentoxifylline and theophylline - significantly decrease mutagenicity of the anticancer aromatic drugs daunomycin, doxorubicin and mitoxantrone. The spectrophotometric titration of these aromatic compounds by methylxanthines indicated formation of mixed aggregates. The concentrations of free active forms of the drugs decreased when the concentrations of methylxanthines increased in the mixture. Therefore, likely methylxanthines may play a role of scavengers of the free active forms of daunomycin, doxorubicin and mitoxantrone.

19

A histological and immunohistochemical study of beta cells in streptozotocin diabetic rats treated with caffeine

58%

Abunasef S. K., Amin H. A., Abdel-Hamid G. A.

Folia Histochemica et Cytobiologica

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2014

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tom 52

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nr 1

20

Kawa - charakterystyka i znaczenie zdrowotne

58%

Kolanowski W.

Żywność, Żywienie a Zdrowie

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1998

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tom 07

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nr 3

305-309

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