Wyniki wyszukiwania - AGRO

1

Prediction of protein secondary structure by neural networks: encoding short and long range patterns of amino acid packing

100%

Vieth M., Kolinski A., Skolnick J., Sikorski A.

Acta Biochimica Polonica

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1992

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tom 39

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nr 4

À complex, cascaded neural network designed to predict the secondary structure of globular proteins has been developed. Information about the local buried-unburied pattern and the average tendency of the particular types of amino acids to be buried inside the globule were used. Nonspecific information about long distance contact maps was also employed. These modifications result in a noticeable improvement (3 - 9%) of prediction accuracy. The best result for the average success ratio for the testing set of nonhomologous proteins was 68.3% (with corresponding Matthews' coefficients, C

2

Amino acid composition of human hair melanoproteins

100%

Wiewiora A., Buszman E.

Acta Biochimica Polonica

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1992

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tom 39

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nr 1

3

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Effect of herbicides on the course of ammonification in soil

88%

Kucharski J., Bacmaga M., Wyszkowska J.

Journal of Elementology

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2009

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tom 14

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nr 3

477-487

A laboratory experiment has been performed to determine the effect of soil pollution with the herbicides: Harpun 500 SC, Faworyt 300 SL, Akord 180 OF and Mocarz 75 WG on the course of ammonification. The soil material for the experiment consisted of loamy sand of pH 6.5. The experiment comprised five replications. Soil samples in particular objects were polluted with the herbicides at rates corresponding to the dose recommended by the manufacturer: 0 – control, 1 – a dose recommended by the producer, and the rates 50-, 100-, 150- and 200-fold higher than the recommended dose. Next, nitrogen was introduced to soil in the form of L-aspartic acid, DL-alanine, L-arginine and urea in the amounts of 0 and 300 mg N kg-1 soil. Having been thoroughly mixed with the additional substances, the soil was brought to moisture equal 60% capillary water capacity and incubated for 12, 24, 36 and 48 hours at 25oC. The study has demonstrated that the course of ammonification depended on the type and rate of a herbicide added to soil, type of an organic compound undergoing ammonification and duration of the trial. L-arginine was ammonified most rapidly, while ammonification of L-aspartic acid lasted the longest. Among the tested herbicides, the strongest inhibitory effect on ammonification process was produced by Mocarz 75 WG, which continued to exert negative influence on mineralisation of organic substances for 36 hours. The other preparations did not have such a considerable effect on the quantities of ammonified nitrogen.

4

Chemical composition and nutritional characteristics of several cereal grain

88%

Kowieska A., Lubowicki R., Jaskowska I.

Acta Scientiarum Polonorum. Zootechnica

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2011

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tom 10

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nr 2

An analysis chemical composition of 33 samples of five cereal grains harvested in oneyear led to a conclusion that the greatest variations and statistically significant differences (P≤0.01) among cereals existed in their content of crude protein, crude fibre and the following fractions of dietary fibre: NDF,ADF, TDF, IDF and SDF.Analyzed winter wheat and winter rye varieties differ significantly (P≤0.01) from other cereal grains in their content of magnesium, potassium, sodium, phosphorus, manganese, zinc and show a statistically significant difference (P≤0.05) in the content of calcium and copper. The average total content of amino acids was highest in wheat and lowest in winter barley. Lysine was found to be the first amino acid limiting (CS) the quality of protein in all analyzed varieties of cereal grains, with the exception of rye, while tryptophan was found to be such an amino acid for animals (WE). The high content of essential amino acids (EAA) was reflected in EAAI, which forWH ranged from 71% (spring barley) to 84% (winter triticale), and forWE from 51% (winter barley) to 60% (winter triticale).

5

Effect of aminoacids on the fungicidal activity of quaternary ammonium salts

88%

Piatkowski J., Swiatek M.

Acta Mycologica

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2010

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tom 45

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nr 2

Amphipatic compounds exhibit an antimicrobial action both on bacteria and fungi. It is caused by a penetrative property of hydrophobic carbon chain of the compuound into a plasma membrane as well as by additional interaction of membrane elements and a hydrophilic amphipathic compound head. Bactericidal and fungicidal activity of this compound strongly depends on chemical environmental factors. In general, microorganisms are not as sensitive in a full medium as in a minimal one and the level of sensitivity rises when the amphipatic compounds are presend in destilled water. Similarly, the sensitivity is stronger in fluid than on solid medium. Our researches revealed however that some aminoacids, although they are complex organic compounds, increase the microbial sensitivity to some tested compound. This efect depends on a microorganism and on a kind of compound. The highest hipersensitivity has been observed against yeast-like fungi when arginine was a cooperating aminoacid. The effect concerns Trichosporon but not E.coli, not occurs in relation to SDS, quaternary ammonium salt IA, and bisammonium salts. Certainly the effect exhibit QAS, which have simple composition of hydrophilic „head” consisting only of methyl group, attaching to alkilic chain possessing keton group, build of 14 or 16 carbon atoms.

6

The amino acids composition and contents of some vitamins in fungal mycelia growne medium containing lignosulphonates

88%

Wojtas-Wasilewska M., Luterek J., Rogalski J., Leonowicz A.

Applied Biology Communications. Lublin Scientific Center

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1992

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tom 02

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nr 5

7

The impact of the amino-acid sequence on the specificity of copper[II] interactions with peptides having nonco-ordinating side-chains

88%

Bal W., Dyba M., Kozlowski H.

Acta Biochimica Polonica

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1997

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tom 44

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nr 3

The review presents specific interactions that occur in complexes of Cu(ll) ions with peptides composed only of amino acids with nonco-ordinating side chains. Three classes of such peptides are discussed. The first type (NSFRY analogues) is characterised by the presence of a specific combination of bulky and aromatic residues, leading to a formation of multiple weak interactions around Cu(II) that result in an extremely high stability of complexes. The second class is composed of complexes of vasopressins and oxytocins, achieving superstability through a pre-conformation in the peptide molecule. The third group are oligopeptides containing one or two proline residues. These peptides form exotic macrochelate loops with Cu(ll) in a result of the break-point effect of Pro residues. Particular emphasis in the review was given to stability constants of complexes, compared to oligoglycine or oligoalanine peptides.

88%

Janiak A., Plucinski T., Kupryszewski G., Cierniewski C. S.

Acta Biochimica Polonica

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1993

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tom 40

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nr 4

Congenitally abnormal fibrinogens with impaired fibrin monomer polymerization have been described to contain single amino-acid substitutions localized in certain positions of the γ275-330peptide region. To evaluate the role of the amino-acid sequence in the vicinity of Arg 275 in fibrin monomer polymerization, the peptide fragment corresponding to γ268-282was synthesized and used to obtain peptide-specific antibodies. These antibodies, when purified immunochemically on the immobilized peptide, bound to the intact fibrinogen and fibrin monomers with the same binding affinity. However, they did not recognize the Y268-282epitopes on the denatured and reduced fibrinogen molecules. The lack of influence of antipeptide antibodies on fibrin monomer polymerization indicates that the γ268-282peptide is not directly involved in the structure of the polymerization site in the D domain of fibrinogen. It is suggested that substitution of Arg275either by His or Cys in abnormal fibrinogens results probably in conformational changes which disturb a proper orientation of the polymerization site and reduce its expression.

15

Changes in proline level in response to osmotic stress and exogenous amino acids in Raphanus sativus L. seedlings

88%

Khanna S., Rai V. K.

Acta Physiologiae Plantarum

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1998

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tom 20

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nr 4

The changes in endogenous proline levels of Raphanus sativus L. seedlings was monitored in presence of exogenous amino acids in normal and osmotically stressed seedlings. In unstressed seedlings, proline uptake was detected only at higher (1 mM) concentration of applied L-proline. however, proline uptake was promoted at all (1 µM to 1000 µM) concentrations of applied L-proline under osmotic stress conditions. Amongst other exogenous amino acids, L-leucine, L-glutamic acid, L-alanine, and L-histidine enhanced endogenous levels of proline, while exogenous hydorxyproline and γ-amino butyric acid reduced it.

16

Factors influencing the development of population of the rumen ciliates Anoplodinium denticulatum in vitro

75%

Michalowski T., Landa I., Muszynski P.

Acta Protozoologica

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1989

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tom 28

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nr 3-4

17

75%

Sikorska A., Gugala M., Zarzecka K.

Acta Scientiarum Polonorum. Agricultura

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2020

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tom 19

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nr 1

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