In vitro Assessment of Health-Promoting Benefits of Sheep ‘Testouri’ Cheese

This study aimed to produce probiotic ‘Testouri’, traditional Tunisian sheep cheese, by direct-to-vat inoculum of probiotic adjuncts. The potential of Testouri sheep cheeses was evaluated by an assessment of gross composition and proteolytic, antibacterial, antidiabetic and antioxidant activities during storage at 4 8C for 28 days. Results highlighted that no significant differences were observed in compositional parameters of the samples at day 0. Probiotic counts in cheeses remained at 8 log CFU g1 during storage. Probiotic cheeses exhibited measurable antibacterial activities with the maximum value (diameter of 12 ± 0.07 mm) on Staphylococcus aureus strain. Also, a-glucosidase and a-amylase inhibitions ranged from 42 ± 0.77 to 58 ± 0.88% and 20 ± 0.9 to 47 ± 1.3%, respectively, during storage. Additionally, cheeses inoculated with probiotics exhibited significant increases in proteolytic and antioxidant activities compared to the control sample. Therefore, Testouri cheese can be considered a good carrier of probiotics and can be promoted for commercial uses

Development and characterisation of functional cultured buttermilk fortified with flaxseed

Abstract Cultured buttermilk is a dairy beverage with a high nutritive value. In the current study, functional cultured buttermilk was formulated using probiotic Lactobacillus plantarum and flaxseed fortification to improve the potential health benefits. The cultured buttermilk samples were analysed for pH, lactic acidity, colour, phase separation, viscosity, microbiology and sensory properties. The results showed non-significant changes in acidity and pH. However, flaxseed fortification decreased phase separation and increased viscosity of buttermilks. In addition, a significant difference in colour attributes was revealed between samples. Sensory characteristics of cultured buttermilks were acceptable to produce a functional food

Oral HPV infection and MHC class II deficiency (A study of two cases with atypical outcome)

<p>Abstract</p> <p>Background</p> <p>Major histocompatibility complex class II deficiency, also referred to as bare lymphocyte syndrome is a rare primary Immunodeficiency disorder characterized by a profondly deficient human leukocyte antigen class II expression and a lack of cellular and humoral immune responses to foreign antigens. Clinical manifestations include extreme susceptibility to viral, bacterial, and fungal infections. The infections begin in the first year of life and involve usually the respiratory system and the gastrointestinal tract. Severe malabsorption with failure to thrive ensues, often leading to death in early childhood. Bone marrow transplantation is the curative treatment.</p> <p>Case reports</p> <p>Here we report two cases with a late outcome MHC class II deficiency. They had a long term history of recurrent bronchopulmonary and gastrointestinal infections. Bone marrow transplantation could not be performed because no compatible donor had been identified. At the age of 12 years, they developed oral papillomatous lesions related to HPV (human papillomavirus). The diagnosis of HPV infection was done by histological examination. HPV typing performed on the tissue obtained at biopsy showed HPV type 6. The lesions were partially removed after two months of laser treatment.</p> <p>Conclusions</p> <p>Viral infections are common in patients with MHC class II and remain the main cause of death. Besides warts caused by HPV infection do not exhibit a propensity for malignant transformation; they can cause great psychosocial morbidity.</p

The effects of business ethics and corporate social responsibility on intellectual capital voluntary disclosure

Purpose: This study aims to examine the potential effect that business ethics (BE) in general and corporate social responsibility (CSR) more specifically can exert on the voluntary disclosure (VD) of intellectual capital (IC) for the ethically most engaged firms in the world. Design/methodology/approach: The research design is based on an inductive approach. As part of the global quantitative investigation, the authors have analyzed the impact of BE and CSR on the transparent communication of the IC. The data under analysis have been investigated using multiple linear regression. Findings: Based on a sample of 83 enterprises emerging as the most ethical companies in the world, the results have revealed that the adoption of ethical and socially responsible approach is positively associated with the extent of VD about IC. This finding may help attenuating the asymmetry of information and the conflict of interest potentially arising with corporate partners. Hence, IC-VD may stand as an evidence of ethical and socially responsible behaviors. Practical implications: Global and national regulators and policymakers can be involved by these results when setting social reporting standards because they suggest that institutional and/or cultural factors affect top management's social reporting behavior in the publication of the IC information. Social implications: Direct and indirect stakeholders, if supported by ethical and socially responsible behaviors of the company, could assess more in detail the quality of the disclosed information concerning the IC. Originality/value: Most of the studies that have been conducted in this field have examined the effect of BE and CSR on the firm's overall transparency, neglecting their potential effect on IC disclosure. This study is designed to fill in this gap through testing the impact of ethical and socially responsible approaches specifically on IC-VD

Ownership structure and technological innovation: an investigation of Tunisian agri-food companies

Purpose - The aim of this study is to investigate potential relationships between the corporate governance system and the innovation development process, with a specific focus on the agri-food sector in the Tunisian context.Design/methodology/approach - Most studies on innovation management have shown the collective nature of the innovation process, resulting from the multiple interactions that can be established between various actors, internal and external to the enterprise perimeter, which is increasingly digitally open, especially in the COVID-19 era. More specifically, the implementation of an innovation strategy is a risky issue for businesses, most of all when considering its financial requirements and impacts, and thus, appropriate management plays a relevant role in this respect.Findings - Statistical tests, operated on a sample of 80 Tunisian companies, show that the style of management and the concentration of ownership exert significant influence on the dynamism of technological innovation in the agri-food sector.Originality/value - The involvement and the commitment of institutional investors can contribute to stimulate the innovation process in the agri-food sector, providing related implications with significant impact, at the scientific and managerial level

Performance improvement of a novel combined water turbine

Nowadays, industrials and researchers are looking for renewable energy resources due to the increase of energy demand. Recently, the ability of combined turbines in harnessing energy from water current has increased their renewed interest. However, there still exist a big knowledge gap to select the optimal design of these turbines. In this paper, systematic studies of stand-alone helical Savonius and delta bladed Darrieus turbines were carried out using experimental methods as a precursor to analyze their roles in hybrid configuration. By varying the attachment angle, two hybrid configurations were tested experimentally. Using the optimal attachment angle, six hybrid configurations were investigated numerically based on the commercial software ANSYS FLUENT 17.0. From one configuration to another, only the design of the Savonius turbine was changed. The maximum power coefficient is found to be equal to 0.191 at tip-speed ratio of 0.63 using a helical bladed Savonius turbine with twist angle of 90°. However, the maximum power coefficient reaches 0.232 using a delta bladed Savonius turbine with the same twist angle. This optimization of the novel combined water turbine could be a solution to enhance the generated power

Chemical composition and functional properties of gum exudates from the trunk of the almond tree (Prunus dulcis)

The physicochemical components and functional properties of the gum exudates from the trunk of the almond tree (Prunus dulcis) have been investigated, along with the emulsification and foaming properties. The gum exudates are composed on dry weight basis by 2.45% of proteins, 0.85% of fats and 92.36% of carbohydrates. The latter consist of arabinose, xylitol, galactose and uronic acid (46.8 : 10.9 : 35.5 : 6.0 mass ratio) with traces of rhamnose, mannose and glucose. Moreover, gum exudates are rich in minerals, such as sodium, potassium, magnesium, calcium and iron. The emulsifying capacity was studied for a 20% w/w olive oil in water emulsion as a function of gum concentration (from 3% to 12% w/w in the aqueous phase) as well as pH levels (from 3.0 to 10.0). The most stable and homogeneous emulsion was prepared with an 8% w/w aqueous almond gum solution at a pH between 5.0 and 8.0. In particular, for the same formulation, the emulsion processed by high pressure homogenization (5 passes at 200 MPa) resulted to be extremely stable under accelerated ageing, exhibiting no significant change in droplet size distribution for 14 days at 55 degrees C. All the tested systems exhibited an extremely low foaming capacity

A Comparative Study on Physicochemical, Rheological and Surface Tension Properties of Tunisian Jujube (Zizyphus lotus L.) Seed and Vegetable Oils

The physicochemical, rheological, surface tension and emulsifying properties of Tunisian jujube (Zizyphus lotus L.) seed oil were investigated and compared with six edible vegetable oils ( olive, corn, soybean, sunflower, groundnut and rapeseed). These results showed that total phospholipids and total tocopherols contents were significantly higher (P < 0.05) in jujube seed oil than those in edible vegetable oils. It was also shown that all oil samples exhibited Newtonian behaviors at shear rate ranged from 10 to 1000 s-1 and the highest viscosity eta was observed in jujube seed oil, followed by olive, rapeseed, groundnut, corn, soybean and sunflower oils. In addition, the interfacial tension value of jujube seed oil was significantly lower (17.56 mN/m) than the corresponding of edible vegetable oils. The emulsions were prepared with different type of oil samples and they were kept for 60 days under 4, 30 and 55 degrees C for stability test. Our results showed that mean droplet size d4,3 of jujube seed oil emulsion was significantly smaller ( P < 0.05) than those of vegetable oils studied. Moreover, jujube seed oil emulsions were stable for 2 months with an average diameter of 213.34 nm. According to the results, jujube seed oil has rheological, interfacial tension, and emulsifying properties that may become interesting for specific applications in several segments of food, cosmetic, pharmaceutical and agrichemical industries