Search Results

You are looking at 1 - 5 of 5 items for

  • Author or Editor: M. Amri x
Clear All Modify Search

Abstract  

Instrumental neutron activation analysis has been applied to analyze 23 bone samples obtained from Libyan patient aged (3–80) years for the study of the concentration levels of trace elements Ba, Br, Ca, Fe, Sr and Zn and their concentration pattems regarding to the age and sex of the patients.

Restricted access

Background and aims

In this study, we aimed to investigate the effects of 10 weeks of high-intensity interval training (HIIT) and endurance training (END) on irisin, betatrophin, insulin, fasting blood glucose (FBG) concentrations, and lipid profiles in diabetic rats.

Methods

Twenty-four Wistar rats (weight: 200–250 g) were randomly assigned into four groups as follows: (1) control (Cnt), (2) diabetic (Dibt), (3) diabetic HIIT (Dibt-HIIT), and (4) diabetic END (Dibt-END). For inducing diabetes, after 12 h of food starvation, nicotinamide (120 mg/kg) and streptozotocin (STZ; 65 mg/kg) were intraperitoneally injected. The diabetic training groups received 10 weeks of HIIT or END training following the induction of diabetes. Twenty-four hours following the last training session, blood serum samples were collected for evaluating the concentration of irisin, betatrophin, and insulin hormones through enzyme-linked immunosorbent assay.

Results

FBG and lipid profiles were measured by biochemical kits. A significant increase in the serum concentration of irisin (p < 0.05), betatrophin (p < 0.05), and insulin (p < 0.001) and significant decrease in the FBG (P < 0.01) and lipid profiles (p < 0.01) were observed in the Dibt-HIIT group compared to the Dibt-END group. In addition, irisin revealed a significant positive association with betatrophin and insulin values in diabetic training groups (p < 0.01).

Conclusions

It seems that HIIT leads to a more extensive improvement in diabetic conditions compared to the END training. Therefore, HIIT appears to be an important time-efficient approach for the treatment of type 2 diabetes.

Restricted access

Orobanche foetida is an important new agricultural problem in Tunisia. It has been recently observed on vetch in Morocco showing increased risk of spread. In order to control this new parasite, field trials were conducted during two crop seasons to examine the effect of sowing date on O. foetida infection by using resistant and susceptible faba bean cultivars. The results demonstrated that late sowing reduced significantly the number and the dry weight of emerged O. foetida shoots for the resistant Najeh cultivar but not for the susceptible Badi cultivar. Late sowing (December) also reduced the number of underground tubercles for both cultivars. With December sowing, some attachments reached emergence stage for Badi but not for Najeh showing a delay in the growth of O. foetida on the resistant cultivar. Seed yield increased significantly on late sowing especially for the resistant Najeh cultivar which produces a much higher seed yield than the susceptible Badi cultivar. This can be explained by the reduced number and dry weight of O. foetida attachments and a slight decrease in shoot dry weight of the resistant cultivar. Combining both resistant cultivar with late sowing could be a useful tool as part of an integrated strategy to control O. foetida in Tunisia.

Restricted access

Aim

To investigate the effects of 3-month-long specific training program on biochemical status, oxidative and antioxidant responses in elite karatekas.

Methods

Twenty male karatekas [BMI: 21.9 ± 2.4 (kg/m2)] participated in this study. They performed a 3-month specific training to prepare for an international competition. We measured selected biochemical parameters, the oxidative and antioxidant responses before (T0) and after 3 months of intense karate training (T1).

Results

We found significant increases in catalase activity (26.3% ± 21.3%, p < 0.0005), superoxide dismutase activity (15.9% ± 28.8%, p < 0.05), and a significant decrease in malondialdehyde levels (17.2% ± 13.7%, p < 0.0005) after 3 months of karate training. Moreover, the athletes’ biochemical status was significantly improved at T1 compared with T0 (for the majority of parameters, p < 0.0005).

Conclusions

The specific training program improves the prooxidant–antioxidant balance of elite karate athletes. It could be recommended for athletes having similar physical fitness level.

Restricted access

The chemical composition, phytotoxic and antifungal activities of the essential oils isolated by hydrodistillation from the aerial parts of Tunisian thyme were evaluated. In order to find best results, different variables (i.e. provenance and phase of plant development) were considered. The chemical composition analysed by gas chromatography/mass spectrometry (GC/MS) revealed variability among provenances displaying interesting chemotypes and that carvacrol (63–84%), limonene (5–10%), δ-terpinene (0–7%), and β-myrcene (0–7%) were the main components. Antifungal ability of Thymus capitatus essential oils was tested by disc agar diffusion against five phytopathogenic fungi: Fusarium avenaceum, F. culmorum, Microdochium nivale var. nivale, Alternaria sp., and Bipolaris sorokiniana. High antifungal activity was observed for the essential oil isolated at the post-flowering development phase for the Bekalta provenance. There was no difference in the antifungal activities of oils isolated at the flowering phase from the other provenances. Thyme essential oils showed high level of weed-killer activity as well against Sinapis arvensis.

Restricted access