Effect Of Cyclohexylamine Research Articles

Effect of spermine and cyclohexylamine on in vitro pollen germination and tube growth in Helianthus annuus

Naturally occurring polyamines (PA) are known to play a key role in growth and development of plants and animals. However, the role of these polycations in the development and germination of the pollen grain is not well understood. The effect of different concentrations of spermine (Spm) on pollen tube growth in Helianthus annuus was investigated. Spermine treatments in the 10−7 to 10−5 M range stimulated pollen tube growth starting in the first 15 min of the incubation period, while 10−4 M Spm treatment resulted in inhibition of pollen tube elongation. The effect of cyclohexylamine (CHA), an inhibitor of Spm synthesis on pollen tube growth and germination percentage was also studied. Cyclohexylamine in the 0.5 × 10−3 M to the 1.5 × 10−3 M range inhibited pollen tube elongation. The relationship of B deficiency, excess B and PA effect on pollen germination and pollen tube growth were also investigated. Key words: Polyamines, pollen, cyclohexylamine, boron

Effects of cyclohexylamine and norspermidine on powdery mildew infection of spring barley

The spermidine synthase inhibitor cyclohexylamine (CHA) and the spermidine analogue norspermidine were evaluated against powdery mildew infection of spring barley in field trials over a 2-year period. Both compounds reduced mildew infection as effectively as a commercial fungicide, a mixture of flutriafol and carbendazim. Percentage disease reduction afforded by CHA and norspermidine in year 1 ranged from 32% to 67% at the final assessment and from 52% to 77% in year 2 of the study, when compared with plants from untreated plots. No difference was observed in the disease control conferred by 1.0 mM concentrations of the compounds and 5.0 mM applications, the optimum dose being less than 5.0 mM. No significant differences in final yield were obtained, comparing the treated crop with the untreated control. Although reductions in disease were apparent, additional environmental factors may have prevented a subsequent crop yield response.

Putrescine decreases exploration of a black and white maze

The effect of putrescine and cyclohexylamine on rat cortical polyamine concentration and on behavior in a black and white maze was studied. The levels of polyamines in brain cortex were determined 15 min, 2, 4, and 6 hours after injection of putrescine (200 or 400 mg/kg) or cyclohexylamine (380 mg/kg). Putrescine concentration increased 6-fold 15 min after injection of putrescine followed by a decline during the next 6 hours. Cyclohexylamine increased putrescine concentration doubling it 4 hours after injection. Spermidine and spermine concentrations did not change after either putrescine or cyclohexylamine injection. Behavior was studied in the Greek cross maze which provides the choice to enter either white or black compartments. Putrescine 200 mg/kg decreased entries into white but not black compartments, while putrescine 400 mg/kg decreased entries into both. The effect of cyclohexylamine was similar to putrescine 400 mg/kg. The behavioral effect of each treatment was independent of the time between injection and testing for up to 6 hours, while the levels of putrescine changed during the same period. Therefore, behavior was not directly related to total cortical putrescine.

Effects of cyclohexylamine on the fertility of male rats

Cyclohexylamine (CHA) was tested for possible dominant lethal mutations in male rats. Female rats were mated with CHA-treated males and were then examined for the number of corpora lutea, total number of implantations and the number of implantations regarded as early deaths. The results showed significant pre-implantation loss in females mated during wk 1 and 2 after intraperitoneal treatment of the males with 100 or 300 mg CHA/kg. The number of early deaths was not significant. An average of 35% of the ova flushed 48 hr after insemination from the oviducts of females mated with CHA-treated males showed no cleavage and did not exhibit two pronuclei. This indicated that fertilization had not occurred. It is concluded that the pre-implantation loss in females mated with CHA-treated males results from some mechanism other than that of dominant lethal mutation.

Effects of cyclohexylamine on rat fertility.

Des rats mâles traites oralement avec du sulfate de cyclohexylamine (220 mg/kg/jour) ont ete accouples a des femelles traitees ou non avec du sulfate de cyclohexylamine. Dans les 2 cas, il y a eu des descendants moins nombreux que chez les controles. Les resultats suggerent que l'effet est transmis par les mâles traites et est, peut-etre, cause par un dommage genetique exprime avant l'implantation de l'embryon.

Corrosion Studies of Aluminum-Brass Condenser Tube Material

Abstract Frequent condenser tube failure in thermal power stations in India prompted this study on the effects of cyclohexylamine, morpholine, and ammonia on the corrosion rate and polarization behavior of aluminum-brass. The corrosion rate of aluminum-brass exposed to steam condensate containing high concentrations of the neutralizing substances is nearly five times greater than that observed in condensate containing no addition agent. The potential and polarization behavior indicates that at high concentrations of amines, anodic depolarization occurs, giving rise to increased corrosion rate.