جستجوی مقالات مرتبط با کلیدواژه « restoration » در نشریات گروه « زیست شناسی »

Prolongation of wound healing time can be led to chronic infections. Therefor, to achieve infection preventive methods to accelerate of wound improvement process is one of essential needs of Human. In this study, the effects of methanolic extract of Holothuria leucospilota was investigated on restoration of created wound in rat skin.  Methanolic extracts of collected sea cucumber from depth of 10 to 15 meters was prepared by rotary. The amount of  0.5 and 1 gr of obtained extraction were added to base ointment. In continuing, 40 rats (average mean of 185±5 gr) were divided into 4 groups which included control, sham (base cream), 0.5% ointment and 1% ointment. Wound (diameter of 6±1 mm) was created on rats’ skin by punch biopsy.  Each group were treated (1ml) with prepared concentrations ointment during 13 days. On days of 0, 4, 7, 10 and 13, the wound improvement process was investigated and the diameter of the wounds was measured. According to results, accelerate the wound recovery process was more obvious in treated groups with 0.5% and 1% ointment compared to control and sham groups. Also, there was significant different between treated group with 1%, sham and control during days of 7, 10, 13 (P<0.05).

The aim of this study was determining the physiological and morphological responses of two-year-old common ash (Fraxinus excelsior L.) seedlings to flooding stress. For this purpose¡ seedlings of common ash were examined in a completely randomized design for 102 days under continuous flooding¡ temporary flooding treatment (for 60 and 42 days drainage¡ respectively) and control. Stomatal conductance¡ transpiration¡ and photosynthesis rate were progressively decreased by flooding while all seedlings survived at the end of flooding. Also¡ flooded plants were able to adequately recover their physiological activities. In addition¡ height¡ root length¡ leaf area¡ and biomass accumulation of seedlings decreased under flooding conditions (particularly in continuous flooding). Diameter growth on the other hand¡ increased in seedlings subjected to temporary flooding. Overall¡ the results showed that two-year-old seedlings of F. excelsior had a suitable response to flooding stress until day 60. After 42 days drainage¡ the physiological characteristics of the seedlings were recovered. Generally¡ on the basis of the findings in this research¡ it is expected that F. excelsior can be used for the purpose of restoration of lowlands and wood production in areas subjected to periodic flooding.