اکرم صداقت

In this study, the effects of drought, fertilization, wounding and bending treatments were investigated on the content and composition of wood lignin in two-year-old eucalyptus seedlings (Eucalyptus camaldulensis). Results showed that drought-induced xylem had the highest concentration of lignin and guaiacyl (G) units and the lowest amount of hydroxyphenyl (H) and syringyl (S) units as well as the lowest S/G ratio compared with other treatments. In contrast, the lowest concentration of lignin and G units and the highest amount of S units and the highest S/G ratio were observed in fertilization treatment. Due to this treatment, H units increased. After wounding, lignin concentration did not change significantly compared with the control treatment and only slightly decreased. However, as a result of this treatment, G units increased significantly and H and S units and S/G ratio decreased. The most important chemical change observed in bending treatment was a sharp increase in H units and a decrease in guaiacyl and syringyl and an increase in the S/G ratio. Overall, it can be concluded that the chemistry of xylem is altered to give the plant the best ability to withstand environmental stresses. Guaiacyl lignin has a more protective role, and increased H lignin is associated with increased growth rate or increased stem flexibility.

The polar and non-polar extractives of Ziziphus spina chrisiti wood were investigated using acetone and ethanol solvents with soxhlet extractor. The extracted portions were further analysed and characterized by GC/MS technique. Results have shown that dinormal-octyl phethalate was the most component of ethanol extracted portion with abundancy of 25.40% and phethalic acid-2-hexyl ester with 2.94% in case of acetone extracted components. Waxes as the most abundance extractives of ziziphus wood were mainly extracted with ethanol and among them dotheriacoanthan was the main component.

Introduction &

Wound healing is the process of repairing following injury to the skin and other soft tissues. Following injury, inflammatory response occurs and the cells below the dermis begin to increase collagen production, later on, the epithelial tissue is regenerated. Royal jelly (RJ) is a bee product. There are many reports on pharmacological activity of RJ on experimented animals. The purpose of this study was to investigate the effect of RJ on the induction of wound healing of sterile incision in Balb/C mice.

In this experimental study which was conducted at Shahr-e-kord University of Medical Sciences in 60 female Balb/C mice (8 weeks old) were selected. The mice were anesthetized with ether. The dorsal fur of the animals was shaved and sterilized with alcohol, and then a longitudinal para vertebral full thickness incision of 10mm long was made. The animals were then divided into six equal groups. In group one (negative control), nothing was applied to the wound. Group 2 (positive control) was treated with nitrofurazon ointment, group 3 was treated with RJ 200 mg/kg daily, group 4 was treated with RJ 200 mg/kg every two days, group 5 was treated with RJ 300 mg/kg daily, group 6 treated with RJ 300 mg/kg every two days. Royal jelly was topically used on the wounds. The wound length was measured with vernier capilar every two days until the complete healing was occurred. The data were analyzed with SPSS version 11.5 using Kruscal Walis tests.

There was a significant difference between groups 1, 2 with the other groups (p< 0.015). RJ promoted wound healing activity significantly in group 3, 5 compared to negative and positive control groups. There was no significant difference between the dosage of 200mg/kg with 300 mg/kg of RJ (p>0.015).

The results of this study indicated that daily application of RJ possesses betters wound healing effects than nitrofurazon.