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Medenine, Tunisia

Jamila Z.,Arid Lands Institute | Mohamed N.,Arid Lands Institute
Vegetos | Year: 2011

Paper embodies the effects of one experimental decapitation frequency on production of bulbs at the end of life cycle of the four accessions of Allium roseum from Tunisia. Allium roseum accessions allocated highest number of bulbs in decapitated plants and lowest in the control plants. Therefore, the accession 22 (El Fjé) and 27 (Bir Ali) maintained a similar total bulbs production as the control also when decapitated. In contrast, accession 28 (Lemaya) showed a good tolerance to decapitation by the highest mean number of bulbs produced. The decapitation treatment had a significant effect on total bulbs, medium and big size of bulbs in all the accessions studies. However, the accession showed significant effect on the number of small and medium bulbs produced by the four accessions of Allium roseum and did not show effect on the number of big bulbs. The interaction between defoliation and accession revealed no significant effect on total, small and big bulbs, but had significant effect on medium size of bulbs produced in all the accessions. Source

Fatnassi M.,Arid Lands Institute | Padalino B.,University of Bari | Monaco D.,University of Bari | Aube L.,University of Rennes 1 | And 3 more authors.
Tropical Animal Health and Production | Year: 2014

Camel management has been changing in recent years from an extensive to a semi-intensive or intensive system, particularly for breeding bulls and dairy dromedary camels. Captivity may affect animal welfare, and low libido is the major complaint for housed breeding bulls. Since welfare status could also affect reproductive performance, the aim of this study was to evaluate different management practices on behavior, particularly on sexual behavior, and to identify some behavioral needs of male dromedary camels reared for semen collection. The effects of the following management systems on their behavior were compared: (i) traditional: housing in a single stall for 24 h (H24), (ii) housing in a single stall for 23 h with 1 h free in the paddock (H23), and (iii) housing in a single stall for 22 h and 30 min with 1 h paddock time and 30 min exposure to a female camel herd (ExF). During the trial, blood cortisol concentrations were assessed and camels were filmed daily for 30 min in the mornings and during a female passage in the evenings. Videos were analyzed in order to fill out a focal sampling ethogram and to score sexual behavior. As a result, there were no differences between the H24 and H23 systems, whereas ExF had a significant positive impact on their sexual behavior score and behavioral repertoire, further reducing cortisol levels. Overall, it seems that male dromedary camel welfare status improves when their behavioral needs for social interaction and movement are satisfied. © 2014 Springer Science+Business Media Dordrecht. Source

Fatnassi M.,Arid Lands Institute | Hammadi M.,Arid Lands Institute | Khorchani T.,Arid Lands Institute
Emirates Journal of Food and Agriculture | Year: 2013

This study aimed to evaluate the effect of temperature (-20°C, + 4°C, room temperature) and storage time (7, 15, 107 and 173 days) of feces on progesterone concentration in camel (Camelus dromedarius). Plasma and feces were collected from 10 pregnant and one non-pregnant camels. Extraction of fecal metabolites of progesterone was performed with methanol and petroleum ether. The analytical validation was provided by internal quality control (IQC) and the success of the validation tests (sensitivity, precision, recovery and parallelism). In comparison to the value found in the day of collection, the mean concentration of progesterone in feces which was frozen or dried at room temperature showed no significant difference after 7 and 15 days. A significant increase was found for fecal samples stored at + 4°C. After 107 and 173 days, freezing is inadequate condition of storage because the fecal progestagen concentrations vary significantly. However, drying feces at ambient temperature maintained stable progestagen concentrations. Therefore, results indicated that drying feces is a reliable method, independent from an electric power source and the freezing equipment. Source

Mighri H.,Arid Lands Institute | Akrout A.,Arid Lands Institute | Neffati M.,Arid Lands Institute
Journal of Medicinal Plant Research | Year: 2011

The main objective of this study is to estimate the essential oil (EO) yield of Artemisia herba-alba through biomass prediction. EO yield dependent in both the biomass production and its EO content, was determined from the recovered biomass after harvest of the upper half of plant tuft. The bio-volume parameter of twenty cultivated individuals of A. herba-alba were estimated four times during four years from height and diameters measurements. In the first harvest, after one year of establishment, several individuals appeared more productive than others. Thus, the canopy diameters of the plant tuft and the bio-volume recorded little significant relationship with the EO yield (R 2 = 0.47 and 0.57, respectively). Harvesting the upper half of plant tuft, the spherical volume model developed by the regenerated material of the same individuals resulted in a high correlation between the EO yield and both the mean diameter (R 2 = 0.61 to 0.62) and the bio-volume (R 2 = 0.66 to 0.83). © 2011 Academic Journals. Source

Hajlaoui H.,University of Monastir | Mighri H.,Arid Lands Institute | Aouni M.,University of Monastir | Gharsallah N.,University of Sfax | And 2 more authors.
Microbial Pathogenesis | Year: 2016

This study investigated the chemical composition and evaluated the antioxidant, antimicrobial, cytotoxic and anti-acetylcholinesterase properties of Tunisian Origanum majorana essential oil. The findings showed that the oil exhibited high activity, particularly in terms of reducing power and β-Carotene bleaching, inducing higher IC50 values than BHT. The oil showed an important antimicrobial activity against 25 bacterial and fungal strains. In fact, the IZ, MIC and MBC values recorded for the bacterial strains were in the range of 8 ± 0-18.33 ± 0.57 mm, 0.097-3.125 and 0.39-6.25 mg/mL, respectively. The IZ, MIC and MFC values of the fungal strains varied between 11±0-28 ± 0 mm, 0.058-0.468 mg/mL and 0.234-1.875 mg/mL, respectively. A low cytotoxic effect was observed against cancer (Hep-2 and HT29) and continuous cell lineage (Vero), with CC50 values ranging from 13.73 to 85.63 mg/mL. The oil was also evaluated for anti-acetylcholinesterase effects, which showed that it exhibited significant activity with IC50 values reaching 150.33 ± 2.02 μg/mL. © 2016 Elsevier Ltd. Source

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