Wyniki wyszukiwania - AGRO

1

Artykuł dostępny w postaci pełnego tekstu - kliknij by otworzyć plik

Calcium ions in the pig pineal gland - an ultracytochemical study

100%

Lewczuk B., Bulc M., Prusik M., Przybylska-Gornowicz B.

Journal of Elementology

|

2007

|

tom 12

|

nr 4

335-346

The aim of the study was to analyze the distribution of calcium ions in the pig pineal gland at the level of electron microscopy. The investigations were performed on the pineals obtained immediately after slaughter (performed between 11:30 and 12:00 a.m.) from 4-month-old gilts. The fixation procedures were conducted with the use of pyroantimonate, which reacted with calcium ions and formed electron dense precipitates. The precipitates were found both in the intercellular spaces and in cells - pinealocytes, gial cells, endothelial cells and fibroblasts. The precipitates were much more numerous in the intercellular spaces than in the cells. Amount and distribution of precipitates differed significantly between pinealocytes, therefore two types of cells were distinguished. The first type of pinealocytes included cells containing a small or moderate amount of precipitates. They were usually characterized by light or dark cytoplasm and large variability in number and structure of dense bodies. Pinealocytes classified to the second type possessed large or very large content of precipitates. These cells were characterized by electron dense cytoplasm and showed the presence of numerous dense bodies. In both types of pinealocytes, precipitates were present in the nucleus and in the cytoplasm. In nuclei, precipitates were numerous in nucleoplasma and rather infrequently noted between membranes of the nuclear envelope. In the cytoplasm deposits were found in mitochondria, vesicles and cisterns of smooth endoplasmic reticulum, in the Golgi apparatus and in cytosol. The amount of precipitates in glial cells, endothelial cells and fibrocytes was lower than in pinealocytes.

2

Proton and calcium ion transport across lipid membranes modified with LHCII complex

100%

Iwaszko E., Wardak A., Krupa Z., Gruszecki W. I.

Polish Journal of Natural Sciences. Supplement

|

2003

|

tom 01

3

Role of the apoplast in Ca2plus metabolism during the pollen-pistil interaction

100%

Lenartowska M., Jaworski K., Lenartowski R., Niedojadlo J., Smolinski D. J., Wrobel B., Bednarska E.

Polish Journal of Natural Sciences. Supplement

|

2003

|

tom 01

4

Selective precipitation of calcium ions by N,N-naphthaloylhydroxylamine - a cytochemical approach

86%

Sobota A., Fabczak S., Skoczylas B.

Acta Protozoologica

|

1988

|

tom 27

|

nr 2

5

Distribution of calcium ions in Sium latifolium root cells affected by moderate water deficit

86%

Sobol M. A., Kordyum E. L.

Acta Physiologiae Plantarum

|

2007

|

tom 29

|

nr 1 Suppl.

6

Motor response of intact cells Fabrea salina and its fragments towards K/Ca factor in external medium

86%

Kubalski A., Lopatowska A., Dryl S.

Acta Protozoologica

|

1988

|

tom 27

|

nr 1

7

Interaction of amphiphiles with model lipid membranes by 1H-NMR

86%

Rozycka-Roszak B., Walkowiak U.

Biophysics of Membrane Transport

|

1994

|

tom 12

|

nr 2

8

Topography of the changes of free calcium ions due to steroid hormone action on human spermatozoa

86%

Kotwicka M., Warchol J. B., Filipiak K.

Folia Histochemica et Cytobiologica

|

1997

|

tom 35

|

nr 2

9

Calcium in pollen-pistil interaction in Petunia hybrida Hort. I. Localization of Ca2 ions in mature pollen grain using pyroantimonate and autoradiographic methods

86%

Bednarska E., Butowt R.

Folia Histochemica et Cytobiologica

|

1994

|

tom 32

|

nr 4

10

Ca2 ions mediate the photophobic response in Blepharisma and Stentor

86%

Fabczak S., Fabczak H., Song P. S.

Acta Protozoologica

|

1994

|

tom 33

|

nr 2

11

Calcium in pollen-pistil interaction in Petunia hybrida Hort. III. Localization of Ca2 ions and Ca2-ATPase in pollinated pistil

86%

Bednarska E., Butowt R.

Folia Histochemica et Cytobiologica

|

1995

|

tom 33

|

nr 2

12

Influence of amphiphilic anionic and cationic mixture on calcium ion desorption from lecithin liposomes. II. Computer simulation

86%

Kubica K., Fogt A., Kuczera J.

Polish Journal of Environmental Studies

|

1994

|

tom 03

|

nr 4

The cellular automaton method was used to simulate the process of ion desorption from the surface of lipid membranes modified with a mixture of cationic and anionic amphiphile molecules. Three models were devised to analyze the influence of anionic long-chain and cationic long-chain compounds, and a mixture of anionic short chain and cationic long chain compounds on bipositive ion desorption. The obtained results are compared with experimental results. These models show the significance of some hypotheses on the role of temporal complexes of the alkylsulphonate anion and calcium ion, of readsorption of calcium ions, and of different methods of molecular aggregation on the kinetics of calcium desorption.

13

The effect of simultaneous application of chlorocholine chloride [CCC] and calcium ions on accumulation of pectic substances fraction in the seedlings of winter wheat

86%

Szynal J.

Applied Biology Communications. Lublin Scientific Center

|

1993

|

tom 03

|

nr 3-4

14

Protective effect of Ca2plus ions on wall polysaccharides of Scenedesmus obliquus [Turp.] Kutz. cells treated with heavy metals

86%

Adam M. S., Abdel-Basset R., Issa A. A.

Acta Hydrobiologica

|

1997

|

tom 39

|

nr 3-4

S. obliquus cultures were subjected to various heavy metals (Cd, Co, Ni and Mn) in the presence or absence of calcium. Ca2+ increased the cell number (unicells or coenobia). Amounts of cell wall polysaccharides and soluble sugars were increased by the heavy metals used and decreased when Ca2+ was added, this perhaps being due to or resulting from inhibited cell division which did not allow the wall components to decrease by being distributed among daughter cells.

15

Distribution of calcified concretions and calcium ions in the pig pineal gland

86%

Lewczuk B., Przybylska B., Wyrzykowski Z.

Folia Histochemica et Cytobiologica

|

1994

|

tom 32

|

nr 4

16

Stability of reconstituted casein systems against calcium ions, high temperature and ethanol

86%

Minkiewicz P., Dziuba J., Darewicz M., Mioduszewska H.

Polish Journal of Natural Sciences

|

2002

|

tom 10

17

Calcium in pollen-pistil interaction in Petunia hybrida Hort. II. Localization of Ca2 ions and Ca2 -ATPase in unpollinated pistil

86%

Bednarska E., Butowt R.

Folia Histochemica et Cytobiologica

|

1995

|

tom 33

|

nr 1

18

The effect of flordimex and calcium ions on the metabolism of carotenoids in seedling of Triticale var. Grado

86%

Sykut A.

Applied Biology Communications. Lublin Scientific Center

|

1993

|

tom 03

|

nr 3-4

19

Visualization of binding sites of calcium and its analogue - cadmium in Acanthamoeba cells

72%

Przelecka A., Ban D. D.

Acta Protozoologica

|

1988

|

tom 27

|

nr 2

20

Biochemistry of magnesium

72%

Pasternak K., Kocot J., Horecka A.

Journal of Elementology

|

2010

|

tom 15

|

nr 3

601-616

Magnesium is essential for biochemical functions of cells. Since Mg2+ has a relatively low ionic radius in proportion to the size of the nucleus (0.86 versus 1.14 f A for Ca2+), it shows exceptional biochemical activity. Due to its physicochemical properties, intracellular magnesium can bind to the nucleus, ribosomes, cell membranes or macromolecules occurring in the cell’s cytosol. It is indispensable for the nucleus to function as a whole and for the maintenance of physical stability as well as aggregation of rybosomes into polysomes able to initiate protein synthesis. Mg2+ can also act as a cofactor for ribonucleic acid enzymes (ribozymes) capable of specifically recognizing and cleaving the target mRNA. As an essential cofactor in NER, BER, MMR processes, Mg2+ is required for the removal of DNA damage. An activator of over 300 different enzymes, magnesium participates in many metabolic processes, such as glycolysis, Krebs cycle, β-oxidation or ion transport across cell membranes. Mg2+ plays a key role in the regulation of functions of mitochondria, including the control of their volume, composition of ions and ATP production.

Ograniczanie wyników