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1

Amino acid - induced insulin release from the perfused rat pancreas. The influence of phenylalanine and tyrosine

100%
Mackowiak P.
Acta Physiologica Polonica
|
1990
|
tom 41
|
nr 7
Maćkowiak P.: Amino acid-induced insulin release from the perfused irat pancreas. The influence of phenylalanine and tyrosine. Acta physiol, pol. The effects of L or D phenylalanine and L tyrosine on insulin release from the perfused rat pancreas were investigated. It was found that in the presence of D-glucose, all three amino-acids stimulate insulin secretion. After L-Phe had been removed from perfusate in the presence or absence of L-Tyr, the secondary rise of insulin release (an “off response”) was noticed. This phenomenon did not follow to either D-Phe or L-Tyr.
2

Influence of near infrared radiation (NIR) on structure of phenylalanine

100%
Olsztynska-Janus S., Komorowska M.
Current Topics in Biophysics. Supplement
|
2011
|
tom 34
|
nr A: Posters
3

Human polymorphonuclear leukocytes aminopeptidases

84%
Vitale L., Grdisa M., Wrischer M.
Folia Histochemica et Cytobiologica
|
1986
|
tom 24
|
nr 2
4
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Angiotensin II - derived peptides devoid of phenylalanine in position 8 have full psychotropic activity of the parent hormone

84%
Holy Z., Braszko J., Kupryszewski G., Witczuk B., Wisniewski K.
Journal of Physiology and Pharmacology
|
1992
|
tom 43
|
nr 2
In this work we compared in rats the influence of heptapeptide 1-7-angiotensin II, hexapeptide 2-7-angiotensin II, pentapeptide 3-7-angiotensin II and angiotensin II on motility, stereotypy, learning of conditioned avoidance responses and recall of passive avoidance behaviour allowing to avoid aversive stimulation. The 4 peptides administered 15 min before the experiment, tended to increase the number of crossings, rearings and bar approaches in open field, significantly accelerated acquisition of conditioned avoidance responses and improved recall of the passive avoidance. All the peptides applied immediately before the experiment intensified stereotypy evoked by apomorphine in the dose 1 mg/kg and amphetamine in the dose 6.5 mg/kg given intraperitoneally. These results show full psychotropic activity of the examined fragments of angiotensin II, comparable with the activity of the parent octapeptide. Our previous hypothesis that the Val-Tyr-Ile-His-Pro fragment of angiotensin II is responsible for the psychotropic activity evoked by angiotensins in rats is thus confirmed.
5

A quantitative bacterial micro-assay for rapid detection of serum phenylalanine in dry blood-spots: Application in phenylketonuria screening

84%
Vallian S., Moeini H.
Journal of Applied Genetics
|
2006
|
tom 47
|
nr 1
Phenylketonuria is an inherited metabolic disease, which is characterized by increased level of serum phenylalanine (Phe). The quantitative measurement of Phe in the serum is necessary to confirm the disease, and to distinguish phenylketonuria from other forms of hyperphenylalaninemia. In this study, we report a rapid and inexpensive micro-assay for simultaneous detection and quantitative measurement of serum Phe in dry blood-spots. Analysis of the standard curve showed a broad linear Phe range of 120-1800 µmol L⁻¹. Application of this method in conjunction with the standard Guthrie bacterial inhibition assay and high-pressure liquid chromatography in analyzing 34 samples from phenylketonuria patients and control samples produced comparable results, with the regression equation of Y= 0.994X + 0.996. The advantage of this method over the Guthrie bacterial inhibition assay is its ability to measure the serum Phe quantitatively without false positive results. The method was successfully applied to dried blood-spots as well as serum and whole blood samples. The cost per sample is about 20-50 US cents, which is much less than those of high-pressure liquid chromatography and enzymatic commercial kits. The method can be automated, which is suitable for neonatal and mass phenylketonuria screening, especially in developing countries, where funding is a limiting factor.
6

Comparative studies on the activities of chitinase, beta-1,3-glucanase, peroxidase and phenylalanine ammonia lyase in the leaves of triticale and wheat infected with Stagonospora nodorum

84%
Rybka K., Arseniuk E., Wisniewska J., Raczynska-Bojanowska K.
Acta Physiologiae Plantarum
|
1998
|
tom 20
|
nr 1
The activities of chitinase, β-1,3-glucanase, peroxidase and phenylalanine ammonia lyase, constitutive and induced by Stagonospora nodorum were examined in the 10 – 14 day old seedlings of three triticale and two wheat cultivars under controlled environmental conditions and in flag leaves of two triticale cultivars in the field. Two S. nodorum isolates of different virulence were used. Both the constitutive and induced activities in triticale and wheat depended on genotype and in triticale the effect of growth conditions was also evidenced. The constitutive activities of chitinase, β-1,3-glucanase and peroxidase were several fold lower in flag triticale leaves in plants from the field than in the seedlings, growing under controlled conditions, but induction in the infected flag leaves was significantly more pronounced. In triticale genotypic differences in the response to infection were revealed only upon inoculation by S. nodorum isolate of higher virulence. The enzymatic activities increased several fold during successive days after the infection except for phenylalanine ammonia lyase. Induction of this enzyme was only transient and the activity decreased 48 or 96 h after infection when the activities of other enzymes were rising. In flag leaves in the field this activity was differentiated only after infection with more a virulent strain. A tendency appeared in triticale seedlings for association of the resistance to the pathogen with lower enzymatic constitutive activities. This relationship became more evident in triticale infected by S. nodorum and may imply that although the investigated enzymes are certainly involved in general, non-specific defense mechanism, they do not decide on the resistance to pathogen at least in the early stages of infection and cooperate with other factors in the complex pathogen-plant interaction. One can also assume that the enzymatic activities are associated with severity of infection rather than resistance to pathogen.
7

Phenylalanine ammonia lyase production by gamma irradiated and analog-resistant mutants of Rhodotorula glutinis

84%
El-Batal A. I., Abo-State M. A., Shihab A.
Acta Microbiologica Polonica
|
2000
|
tom 49
|
nr 1
8

Application of HPLC and GC-MS to quantification of phenylalanine in chosen kinds of food for particular nutritional uses

84%
Piecyk M., Srama A., Bzducha A., Obiedzinski M.
Acta Scientiarum Polonorum. Technologia Alimentaria
|
2007
|
tom 06
|
nr 2
The aim of the work was the estimation of HPLC and GC/MS methods usefulness for the quantitative determination of phenylalanine in low protein cereal products (LPP). LPP products from two different producers (A and B), and related traditional products were investigated. The protein content was analysed with Kiejdahl method and the phenylalanine concentration was measured with high performance liquid chromatography (HPLC) coupled with UV detector (UV = 214 nm) and by the method of gas chromatography connected with mass spectrometry (GC/MS) using the ‘EZ:faast’ amino acid test (Phenomenex). The content of the amino acid was analysed after acid hydrolysis (6 M HCl, time: 24 and 48 h, temperature 110°C). The content of protein was determined higher than the producer’s declaration for all products of the producer B and some of the producer A. The higher protein content did not influence the concentration of phenylalanine detected with HPLC. Phenylalanine level was found below the declaration of the producer in most of the products. In most cases, there was no significant influence of the hydrolysis time on the quantity of the analysed phenylalanine
9
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Insulin-secretional effect of exogenic amino acids in rabbits

84%
Mackowiak P., Nogowski L., Nowak K. W.
Journal of Physiology and Pharmacology
|
1993
|
tom 44
|
nr 4
10
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Content available

Beyond sequence similarity – the curious case of GW/WG protein domain

67%
Karlowski W. M.
BioTechnologia. Journal of Biotechnology Computational Biology and Bionanotechnology
|
2011
|
tom 92
|
nr 4
11

Ocena zapotrzebowania krow mlecznych na fenyloalanine. Czesc II. Wplyw rosnacych dwunastniczych infuzji fenyloalaniny na wykorzystanie aminokwasow niezbednych przez gruczol mlekowy

67%
Pisulewski P. M., Rulquin H., Massy A.
Acta Agraria et Silvestria. Series Zootechnica
|
2000
|
tom 38
81-92
12

Ocena zapotrzebowania krow mlecznych na fenyloalanine. Czesc I. Wplyw rosnacych dwunastniczych infuzji fenyloalaniny na wydajnosc i sklad mleka krow

67%
Pisulewski P. M., Rulquin H., Massy A.
Acta Agraria et Silvestria. Series Zootechnica
|
2000
|
tom 38
67-79
13
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Content available

The directed enzymatic casein hydrolysis

67%
Idziak J., Moszczynski P.
Polish Journal of Food and Nutrition Sciences
|
1993
|
tom 02
|
nr 1
14

Changes in phenylalanine ammonia-lyase activity and phenolics content and composition in leaves of winter oilseed rape plants, affected by low temperature

67%
Solecka D.
Biological Bulletin of Poznań. Supplement
|
1997
|
tom 34
15

Immunosuppressive activity of some peptides related to cycloamanide A [CyA A] and to the active fragment of a peptide immunomodulator from ovine colostrum

67%
Bolewska-Pedyczak E., Wieczorek Z., Zimecki M., Siemion I. Z.
Archivum Immunologiae et Therapiae Experimentalis
|
1993
|
tom 41
|
nr 5-6
16
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Content available

Chromatograficzny rozdzial izomerow tyrozyny. O-tyrozyna jako produkt radiacyjnej hydroksylacji fenyloalaniny i wskaznik napromieniowania zywnosci

43%
Zegota A., Zegota H.
Żywność Technologia Jakość
|
1997
|
tom 04
|
nr 4
36-44
17

Wlasciwosci chemiczne i biologiczne glukozynolanow rzepaku

43%
Rakowska M.
Biuletyn Instytutu Hodowli i Aklimatyzacji Roślin
|
1997
|
nr 201
373-384
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