The 17-membered macrocyclic spermine alkaloid protoverbine (8-phenyl-1,5,9,13-tetra azacycloheptadecan-6-one) was isolated From the aerial part of verbascum speciosum. The natural polyamines are ubiquitous bases reported to have several important functions in animals, plants and microorganisms. They are involved in processes of transcription and translation in protein synthesis and influence gr...

The lyophilized venom of the spider Paracoelotes birulai (Araneidae: Amaurobiidae) has been analyzed. A no. of acylpolyamines were found and sepd. By online coupled high-performance liq. chromatog. and atm.-pressure chem.-ionization mass spectrometry, the structures of the three most abundant compds. PB 490 (N-(16-guanidino-4-hydroxy-4,8,12-triazahexadecyl)-2-(4-hydroxyindol-3-yl)acetamide), PB...

in order to study the effect of pre and postharvest polyamines spraying on increasing vase life of alstroemeria (alstroemeriaaurantica cv.sukari), an experimental was conducted on completely randomized factorial design with two types polyamines (putrescine, spermine) in four levels (zero, five, 10, 15 and 20 mg/l). results showed that, 20 mg/l of putrescine and spermine treatments increased vas...

adenosine deaminase is an aminohydrolase (ec 3.5.4.4) which participates in the purine metabolism where it degrades either adenosine or 2'-deoxyadenosine producing inosine or 2'-deoxyinosine, respectively. the enzyme contains a parallel alpha/beta -barrel motif with eight central beta strands and eight peripheral alpha helices. ada is located both in the cytosol and on the cell membrane. since ...

The macrocyclic complexes of biological importance with power transition metals are synthesized by template methodology leading to the formation of the complex [MLX] X2; where L is macrocyclic ligand derived from 3,4-diaminotoluene, 2,4-thiazolidinedione, M=Cr (III) and Fe(III) X is Cl-, CH3COO- or NO3_.Characterisation of these complexes are through with the assistance of elemental analyses(CH...

this study was performed to investigate the effect of putrescine and spermine on some physiological and biochemical characteristics and antioxidant enzymes activity of peach (prunus persica cv. alberta) and almond (prunus dulcis cv. rabi) seedlings under water deficit. the first factor was water regime at two levels (80% or 50% of soil available water), and the second factor was polyamine treat...

The precise analysis of redox chemistry of MN4-based macrocyclic complexes is of great importance because of stabilization of unusual oxidation states of metal ions by macrocyclic ligand and thus have various applications in biochemistry, electrochemistry, electrocatalysis, pharmaceuticals etc. In this work, MN4-macrocyclic complexes of Co (II) and Ni(II) transition metal ...

Investigation was done to find out the effect of different polyamines viz., spermine and spermidine (5, 10, 20 mg/l) biostimulants 2 % Novel (banana pseudostem sap) 2% cow urine as foliar spray on growth parameters rose var. Top Secret.
 Plant height, number branches leaves were found be significantly higher with biostimulants. Maximum plant height in plants treated mg/l while maximum sper...

For some porphyrinoids, such as orangarin and amethyrin, the main route of macrocyclic pi-circulation is different from the main macrocyclic conjugation pathway predicted by porphyrin chemists. Our analytical theory of ring-current diamagnetism allows us to predict the main macrocyclic conjugation pathway from the ring current distribution. We can now interpret macrocyclic aromaticity and macro...