Results 181 to 190 of about 32,576 (231)
Some of the next articles are maybe not open access.
Uptake of putrescine by Tetrahymena
Zeitschrift f�r Zellforschung und Mikroskopische Anatomie, 1971The uptake of the diamine 3H-putrescine by Tetrahymena pyriformis GL was studied in cultures which were synchronized by heat shocks. An inverse correlation was found between the uptake of putrescine and the acid stability of DNA, but there was also a parallelism between putrescine uptake and the intracellular amount of putrescine. There was no evidence
B, Holm, H, Emanuelsson
openaire +2 more sources
Amperometric flow injection determination of putrescine and putrescine oxidase
Analytica Chimica Acta, 1998Abstract Flow injection methods for sensitive, accurate and rapid determination of diamines, mainly putrescine (PUT) and cadaverine (CAD), and diamine oxidase (DAO) are described. Putrescine determination is based on an immobilized enzyme reactor (IER) loaded with putrescine oxidase and amperometric detection of the produced hydrogen peroxide at a ...
Sayed A.M Marzouk +6 more
openaire +1 more source
Putrescine transport in human platelets
Biochimica et Biophysica Acta (BBA) - Biomembranes, 1985Putrescine transport has been studied in human platelets. The uptake of putrescine is saturable and appears to be an energy-dependent process, since it is inhibited by the uncoupler 2,4-dinitrophenol and low temperature. The evidence presented suggests that the uptake process is complex and may be dependent upon pH gradient, membrane potential, and ...
S G, Nadler, M T, Takahashi
openaire +2 more sources
Putrescine and spermidine transport in Leishmania
Molecular and Biochemical Parasitology, 2000The transport of putrescine and spermidine into Leishmnania donovani promastigotes and Leishmania mexicana promastigotes and amastigotes has been characterised. Polyamine transport was shown to be saturable and temperature-sensitive for both developmental stages of Leishmania.
M, Basselin, G H, Coombs, M P, Barrett
openaire +2 more sources
An enzymatic-isotopic microassay for putrescine
Biochimica et Biophysica Acta (BBA) - General Subjects, 1973Abstract A highly sensitive enzymatic isotopic microassay procedure for the measurement of putrescine (1,4-diaminobutane) is described. The method depends on the enhancement by putrescine of the decarboxylation of S- adenosyl - L -[carboxy- 14 C ] methionine by baker's yeast (Saccharomyces cerevisiae) S- adenosyl - L ...
S I, Harik, G W, Pasternak, S H, Snyder
openaire +2 more sources
Plant Science, 1995
Exogenous spermidine applied to maize seedlings through the roots increases the endogenous putrescine titer of primary roots during the first hour of treatment. The putrescine increase was due neither to a transfer from bound and conjugated pools into the free form nor to de novo synthesis.
Massimo Zacchini, R Federico
exaly +4 more sources
Exogenous spermidine applied to maize seedlings through the roots increases the endogenous putrescine titer of primary roots during the first hour of treatment. The putrescine increase was due neither to a transfer from bound and conjugated pools into the free form nor to de novo synthesis.
Massimo Zacchini, R Federico
exaly +4 more sources
Metabolism of putrescine in the pregnant rat
Acta Physiologica Scandinavica, 1981The in vivo metabolism of14C‐putrescine injected to rats before, during and after pregnancy was studied. Within 30 min of the administration of the isotope 9–12% of the injected radioactivity was recorded as14CO2in the expired air and after 5 h 60% was expired.
A C, Andersson, S, Henningsson
openaire +2 more sources
Is Putrescine an Essential Nutrient for Avians?
Nutrition Reviews, 2009Putrescine addition to a complete crystalline amino acid diet elicited a growth response in young chicks, suggesting that putrescine may be an essential nutrient in avians. However, high dietary putrescine levels can depress weight gain.
openaire +2 more sources
Putrescine Bisamides from Aglaia gigantea
Journal of Natural Products, 2007Phytochemical analysis of the leaves of Aglaia gigantea collected in Vietnam yielded three cinnamoyl putrescine bisamide derivatives, which included the known compound dasyclamide ( 1), as well as two new natural products, gigantamide A ( 2) and grandiamide D ( 3). In this study, the structure of dasyclamide ( 1) was confirmed by X-ray crystallography.
Duong, Tu Ngoc +8 more
openaire +4 more sources