Temat: Enzyme - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Genetic variability in selected Polish population of Dreissena polymorpha [Pallas] [Bivalvia; Dreissenidae]
Autorzy:: Zielinski, R
Soroka, M
Wachowiak-Zielinska, M
Powiązania:: https://bibliotekanauki.pl/articles/2047704.pdf
Data publikacji:: 1996
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: genetic variability
Polska
Bivalvia
Dreissena polymorpha
enzyme polymorphism
population
Dreissenidae
Opis:: Genetic variability of a selected population of Dreissena polymorpha, an invasive species playing a significant role in aquatic ecosystems, was studied. Starch gel electrophoresis was used to analyse 8 enzymatic loci in 200 individuals collected from 20 sites in a lake. The population was found to have 75.0% of polymorphic loci, 2.8 alleles per locus, 3.5 alleles per polymorphic locus, 0.393 coefficient of expected heterozygosity, and 149 genotypes. Zebra mussel clumps were strongly polymorphic; almost every individual had a different genotype. The high polymorphism observed in the D. polymorpha clumps had most likely resulted from external cross-fertilisation and the presence of free-swimming veliger larvae as well as from a considerable heterozygosity of individual bivalves. Genetic variability of the population studied was found to be similar to that of populations inhabiting other Western Pomeranian lakes, including both highly polluted ones and those formed as recently as about 40 years ago. This provides evidence for a mass colonisation of freshwater reservoirs effected by very polymorphic parent populations of D. polymorpha. The literature data on North American zebra mussel populations which invaded that continent about 10 years ago show them to be polymorphic, too, but not as much as European ones.
Źródło:: Journal of Applied Genetics; 1996, 37, 1; 105-120
1234-1983
Pojawia się w:: Journal of Applied Genetics
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: Morphological and enzymatic variability and adaptation of zig-zag clover [Trifolium medium L.]
Autorzy:: Bulinska-Radomska, Z
Powiązania:: https://bibliotekanauki.pl/articles/2043605.pdf
Data publikacji:: 1999
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: zig-zag clover
Polska
enzyme variability
adaptation
morphological variability
Trifolium medium
climate
Źródło:: Journal of Applied Genetics; 1999, 40, 4; 293-304
1234-1983
Pojawia się w:: Journal of Applied Genetics
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 3.

Tytuł:: Leucocyte acid phosphatase and selected haematological indices in BLV infected cows
Autorzy:: Kaczmarczyk, E
Czarnik, U.
Bojarojc, B.
Walawski, K.
Powiązania:: https://bibliotekanauki.pl/articles/2043884.pdf
Data publikacji:: 1999
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: hematological index
cow
polymorphism
blood leucocyte
acid phosphatase
cattle
lysosomal enzyme
leucocyte
enzootic bovine leukemia
Źródło:: Journal of Applied Genetics; 1999, 40, 2; 93-101
1234-1983
Pojawia się w:: Journal of Applied Genetics
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 4.

Tytuł:: Genetic variation and population structure of three Trifolium species
Autorzy:: Bulinska-Radomska, Z
Powiązania:: https://bibliotekanauki.pl/articles/2047280.pdf
Data publikacji:: 1996
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: Trifolium montanum
enzyme
population structure
Trifolium fragiferum
Trifolium campestre
polymorphic locus
Trifolium
genetic variation
Opis:: Three diploid Trifolium (Fabaceae) species, T. campestre, T.fragiferum and T. montanum, were electrophoretically assayed to elucidate the range and organization of genetic variation in relation to the mating system, reproduction mode and longevity of the species. T. campestre is an annual self-pollinated species. T.fragiferum and T. montanum are cross-pollinated perennials. The former species reproduces both sexually and vegetatively, whereas the latter relies solely on sexual reproduction. Several populations of each species collected throughout Poland were surveyed for 15 enzymes. The measures of variation included: proportion of polymorphic loci per population, average number of alleles per locus, average gene diversity (He) and genetic distance (D). To describe the organization of diversity in each species, total genetic variation per locus (Ht) was calculated and partitioned into intra-(Hs) and inter-(Dst) populational components. Both cross-pollinated species had more polymorphic loci, higher numbers of alleles per locus and higher level of diversity than self-pollinated T. campestre. Most of genetic variation of the latter species was allocated among populations unlike in T.fragiferum and T. montanum.
Źródło:: Journal of Applied Genetics; 1996, 37, 2; 153-160
1234-1983
Pojawia się w:: Journal of Applied Genetics
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 5.

Tytuł:: Different mutations in Polish patients with HPRT deficiency - the Lesch-Nyhan and Kelley-Seegmiller syndromes
Autorzy:: Popowska, E
Sulek, A.
Kubalska, J.
Pronicka, E.
Jezewska, M.
Trembacz, H.
Goryluk-Kozakiewicz, B.
Krajewska-Walasek, M.
Powiązania:: https://bibliotekanauki.pl/articles/2044455.pdf
Data publikacji:: 1998
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: deletion
Lesch Nyhan syndrome
Kelley-Seegmiller syndrome
hypoxanthine-guanine phosphoribosyltransferase deficiency
enzyme activity
Polish patient
point mutation
Opis:: Five families with the Lesch-Nyhan syndrome (LNS) and two families with the Kelley-Seegmiller syndrome (KSS) were studied. Seven different mutations were identified. Two transitions, C526→ T (Prol76Ser) and G481→A (Ala161Thr), in patients with a milder form of hypoxanthine-guanine phosphoribo-syltransferase (HPRT) deficiency were detected. In patients with the Lesch-Nyhan syndrome two transitions, G569→A (Glyl90Glu) and C508→T (Arg170Ter), two transversions, C222→A (Phe74Leu) and C482→A (Ala161Glu), and a deletion of seven nucleotides (from A394 to G400) were observed. All except two of the identified mutations are novel. The C222→A substitution in exon III is located within one of the clusters of hot spots of the HPRT gene and has been previously described in four unrelated patients. The other recurrent mutation C508→T in exon VII has been reported in eight families.
Źródło:: Journal of Applied Genetics; 1998, 39, 1; 103-111
1234-1983
Pojawia się w:: Journal of Applied Genetics
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 6.

Tytuł:: Estimation of induced mutation rates of four esterase genes in barley [Hordeum vulgare L.]
Autorzy:: Kucharska, M
Maluszynski, M.
Powiązania:: https://bibliotekanauki.pl/articles/2044884.pdf
Data publikacji:: 1998
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: mutation frequency
isoenzyme
barley
hybrid
mutagen
enzyme system
plant morphology
mutant
Hordeum vulgare
esterase
estimation
seed
Opis:: Induced mutation rate of barley esterase loci has been estimated. Results suggested that about 3% of investigated M₁ spikes had seeds which gave rise to M₂ seedlings mutated in one of four esterase loci. M₁ plants were obtained after chemical treatment of seeds from two spring barley cultivars Aramir and Bielik. The majority of mutants were reconfirmed in the М₃ generation.
Źródło:: Journal of Applied Genetics; 1998, 39, 2; 141-145
1234-1983
Pojawia się w:: Journal of Applied Genetics
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 7.

Tytuł:: Genetic regulation of alpha-amylase synthesis in rye [Secale cereale L.] grain
Autorzy:: Masojc, P
Stojalowski, S
Lapinski, M
Miazga, D
Powiązania:: https://bibliotekanauki.pl/articles/2047279.pdf
Data publikacji:: 1996
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: enzyme synthesis
activity
chromosome
rye
Secale cereale
crossing
alpha-amylase
sprouting line
duplicate gene
addition line
genetic regulation
Opis:: Genetic analysis of two rye interline crosses and a set of wheat/rye chromosomal addition lines was performed to reveal the mechanism underlying wide variation range of alpha-amylase activity in sound grain. The long arm of chromosome 6R was found to be responsible for increased enzyme synthesis during late stages of triticale grain maturation. Only nuclear genes seemed to control alpha-amylase activity, as reciprocal crosses between rye lines showed no maternal effects. Low enzyme activity showed complete dominance over high level of its synthesis. Segregation ratios, observed in F₂ and BC₁ crosses, indicated that recessive alleles at two independent duplicative loci underlie intensive alpha-amylase production.
Źródło:: Journal of Applied Genetics; 1996, 37, 2; 141-152
1234-1983
Pojawia się w:: Journal of Applied Genetics
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 8.

Tytuł:: Ornithine transcarbamylase gene mutations and genotype-phenotype correlation in Polish patients with hyperammonemia type 2
Autorzy:: Popowska, E
Ciara, E.
Rokicki, D.
Pronicka, E.
Powiązania:: https://bibliotekanauki.pl/articles/2043869.pdf
Data publikacji:: 1999
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: metabolic disease
genotype-phenotype correlation
polymorphism
patient
Polska
ornithine transcarbamylase
urea cycle
child
hyperammonemia type 2
mitochondrial enzyme
gene mutation
Źródło:: Journal of Applied Genetics; 1999, 40, 1; 43-52
1234-1983
Pojawia się w:: Journal of Applied Genetics
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 9.

Tytuł:: Plant height and yield components of inbred isogenic and F1 hybrid Rht dwarf wheats
Autorzy:: Flintham, J E
Gale, M.D.
Powiązania:: https://bibliotekanauki.pl/articles/2044459.pdf
Data publikacji:: 1998
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: chemical hybridizing agent
F1 hybrid
wheat
plant height
grain yield
hybrid genotype
heterosis
alpha-amylase
enzyme activity
breeding programme
yield component
Rht allele
Opis:: Single and double-gene Rhtl, Rht2, Rht3, Rht1 + Rht2 and Rht3 + Rht2 isogenic lines of wheat in four parental rht varieties were grown in drilled yield trials at four sites in 1989. The same lines were also grown in 1988 together with hybrid genotypes from CHA (chemical hybridising agent) F₁ production plots. In the inbred lines shorter than one metre, Rht alleles reduced total shoot biomass by shortening the straw; mass of straw per unit plant height was unaffected. Highest grain yield was obtained from plant heights between 70 and 100 cm. The Rht genotype achieving this stature varied according to parent varietal height. The hybrids grown allowed comparisons between intra- and inter-varietal crosses over a range of Rht genotypes. In F₁ hybrids positive heterosis was observed for plant height, grain yield and mean grain weight. Highest yields were obtained from inter-varietal hybrids carrying one, two or three doses of Rht1 or Rht2 or one dose of Rht3. An Rht3lrht hybrid showed resistance to premature α-amylase production during grain ripening.
Źródło:: Journal of Applied Genetics; 1998, 39, 1; 73-83
1234-1983
Pojawia się w:: Journal of Applied Genetics
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 10.

Tytuł:: Analysis of chromosome aberrations, sister chromatid exchanges [SCE] and cell division kinetics in human lymphocytes exposed in vitro to new monophosphates of pyrimidine acyclonucleosides
Autorzy:: Ferenc, T
Rutkowski, M.
Bratkowska, W.
Hubner, H.
Draminski, M.
Powiązania:: https://bibliotekanauki.pl/articles/2044452.pdf
Data publikacji:: 1998
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: statistical analysis
chromatid gap
chromosome number
enzyme activity
chromosome aberration
in vitro
chromosome gap
pyrimidine
phosphorylase
acyclonucleoside monophosphate
human lymphocyte
sister chromatid exchange
cell division
Opis:: Five newly synthesised monophosphates of two pyrimidine acyclonucleoside series, namely 1-N-[(2’-hydroxy)ethoxymethyl] and l-N-[(l’,3’-dihydroxy)- 2’-propoxymethyl] derivatives of 5- and 5,6-alkylated uracils were tested in vitro for chromosome aberrations and sister chromatid exchanges (SCE). Metaphase plates were obtained via microculture of human lymphocytes from heparinized peripheral blood. The compounds were tested in doses: 10, 20, 40, 80 and 150 µg per mL of culture. The tested compounds induced mainly chromatid gaps, less frequently chromosome gaps. A low number of mitoses with chromatid and chromosome breaks, acentric fragments, dicentric chromosomes and exchange figures were also observed. The tested compounds in doses: 40, 80 and 150 µg per mL, doubled or tripled the percentage of cells with chromatid gaps and chromosome gaps as compared to the control. The percentage o cells with aberrations (excluding gaps) induced by the tested compounds in all doses did not exceed 2%. The tested compounds induced a higher number of SCE per cell but less than double frequency as compared to the control. SCE frequencies and replication index (RI) values varied depending on the examined compounds. For the highest dose of the tested compounds (150 µg per mL) a significant decrease in RI values was observed for l-N-[(2’-hydroxy)ethoxymethyl]-5,6-tetramethyleneuracil monophosphate and for l-N-[(2’-hydroxy)ethoxymethyl]-5,6-dimethyluracil monophosphate. So far, the results have indicated potential clastogenicity of all the tested compounds except acycloguanosine monophosphate.
Źródło:: Journal of Applied Genetics; 1998, 39, 1; 113-127
1234-1983
Pojawia się w:: Journal of Applied Genetics
Dostawca treści:: Biblioteka Nauki