Touhami Khorchani

Touhami Khorchani
Institut des Régions Arides | IRA · Livestock and Wildlife Laboratory

PhD

About

170
Publications
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1,597
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Publications

Publications (170)
Article
Full-text available
An edible coating was developed using gelatin extracted from the skin of gray triggerfish (Balistes capriscus) and applied to the fillet of the smooth‐hound shark (Mustelus mustelus). Moringa oleifera leaf extract was added to gelatin coating solution to improve its preservative properties. The phenolic profiles and antioxidant and antibacterial ac...
Article
Full-text available
Gelatin is a natural polymer that can be derived from collagen through hydrolysis. It most extensively used in diverse fields, mainly in pharmaceuticals and therapeutic. Herein Gelatin was newly extracted from camel (Camelus dromedarius) skin and irradiated with gamma rays from 60 Co source. Gelatin was optimized and characterization and functional...
Article
Full-text available
The efficacy of camel milk to treat diabetes has been shown recently, especially in experimental animals and in patients with diabetes type 1 (T1DM), whereas studies on patients with type 2 diabetes mellitus (T2DM) are limited. In this clinical trial, 60 patients with T2DM who used oral antidiabetic drugs were assigned into two groups; group 1 rece...
Article
Full-text available
Research on bioactive compounds derived from medicinal plants is still topical and their applications are of interest to food industry, phytopharmacy and cosmetics. The present study deals with the phenolic compounds profile and antioxidant activities of Moringa oleifera Lam. leaves. Therefore, this work is a contribution to study the potential of...
Article
Full-text available
Astragalus gombo Coss. & Dur L. Ex-Bunge is an endemic species of Algerian arid and semi-arid regions, however, is commonly used in traditional medi-cines. The aerial part was extracted by 80/20 methanol/water and water. The first crude extract was fractionated by ethyl acetate, n-butanol and methanol. LC-ESI-MS analysis revealed 25 compounds among...
Chapter
The aim of this work is to study the effect of lactation stage and camel farming system on microbiological, physicochemical parameters, and identification of lactic acid bacteria (LAB) of camel milk. Samples were collected from four camels in semi-intensive system and four camels in intensive system. Microbiological and physicochemical parameters w...
Article
Background: The shelf life of meat products can be increased by adding synthetic antioxidants. These antioxidants have long been used, but their safety has recently come into dispute due to a suspected carcinogenic potential. This is why meat technologies have extracted new natural antioxidants from spices and herbs, which are the best alternatives...
Article
L’objectif de ce travail est la détermination de la composition chimique et de la digestibilité in vitro des graines de deux variétés (Lathyrus Sativus) de gesse, à fleurs blanche et violette, en comparaison avec le concentré commercial. Les analyses de la composition chimique de la gesse ont porté sur la matière sèche (MS), la matière minérale (MM...
Chapter
Colostrum is an important source of nutrients and immune factors for the newborn. The nutrient profile and immunological composition of colostrum vary from species to species. The composition and characteristics of the colostrum of human, cows, and goats have been the subject of several studies. The study of the characteristics of camel colostrum i...
Chapter
This research was conducted aiming to improve the coagulation abilities of camel milk using an enzymatic extract from the Kaolin Layer (EKL) of chicken gizzards as a substitute to commercial rennet. The crude extract was prepared by dissolving dry Kaolin layer powder on a mixture of Nacl/CaCO3. The milk clotting activity (MCA) of the crude extract...
Article
Full-text available
Scrapie is a fatal prion disease. It belongs to transmissible spongiform encephalopathies (TSEs), and occurs in sheep and goats. Similarly, to ovine species, the prion protein gene (PRNP) plays a major role in conferring resistance or susceptibility to TSE in goats. This study assesses the variability of PRNP in native and crossed-breed goat popula...
Article
Full-text available
This research aimed to prospect latex fractions from Ficus carica for new plant peptidases with milk-clotting activities of camel milk, for use as rennet alternatives. Latex fractions, extracted from the fig tree (Ficus carica), show proteolytic and milk-clotting activity. The enzymatic preparation was obtained by fractionation of latex from fig tr...
Article
Full-text available
Effects of two different management systems on male dromedary camel hormones, behaviors, and semen parameters were documented. Camels ( n =6) were tested under two management systems: (i) housed in single boxes with 1-h freedom (H23); (ii) exposed to females for 17 h (from 3.30 p.m. to 8.30 a.m.) and then housed (ConExF). Blood was collected every...
Article
Full-text available
The transformation of camel milk into cheese is an operation considered very delicate because of several difficulties encountered in achieving coagulation. The present study aims to improve coagulation abilities of camel milk using enzyme extracts from pineapple, kiwi, and ginger. Our results concerning the characterization of the enzymatic extract...
Article
Full-text available
In this paper, we focus on the camelid nanobodies as a revolutionary therapy that can guide efforts to discover new drugs for Coronavirus disease (COVID-19). The small size property makes nanobodies capable of penetrating efficiently into tissues and recognizing cryptic antigens. Strong antigen affinity and stability in the gastrointestinal tract a...
Article
Full-text available
This study aimed to determine the physicochemical properties and antioxidant activities of dromedary skim colostrum and milk powder produced by freeze-drying. Results of the study showed that skim colostrum powder possessed higher protein content compared to milk powder whereas this latter had greater lactose and ash content. The analysis of minera...
Article
Full-text available
This study aimed to investigate the milk production potential and the impact of nongenetic factors on milk yield and composition of Tunisian dromedary camels. Milk recording and sampling were carried out at monthly intervals over complete lactation for 3 years from 95 camels reared in intensive and semi-intensive systems. The overall means of daily...
Article
Full-text available
Background: Diarrhea caused by Escherichia coli is a major cause of morbidity and mortality in young animals. Few treatment options are available, mainly antibiotic therapy increasingly limited by resistance to commonly used drugs. Objectives: The aim of this work was to develop immunotherapy based on the use of camel VHH antibody fragments, or...
Article
This work intended to compare dromedary yogurt’s characteristics obtained by a co-fermentation process with plant (carob powder) or autochthonous bacteria (Enterococcus faecium and Streptococcus macedonicus). For this reason, the ultrafiltration process (UF) is applied to increase the rate of total solids in dromedary milk within the margin needed...
Article
This work aimed to identify autochthonous lactic acid bacteria (LAB) from spontaneously fermented dromedary milk and explore their technological and probiotic properties in vitro. Analysis of the strains by 16S rDNA gene sequencing revealed four strains as Enterococcus faecalis, one strain as Enterococcus faecium, one strain as Lactococcus lactis,...
Article
Full-text available
Research background. Milk protein hydrolysates have received particular attention due to their health-promoting effects. Dromedary milk differs from the milk of other dairy animals in the composition and structure of its protein components, which give it unique properties. Whole dromedary milk proteins and their enzymatic hydrolysates have not rece...
Article
Healthy animals can constitute a reservoir for Escherichia coli potentially dangerous for humans. Our objectives were to investigate virulence genes in E. coli isolated from healthy animals in southern Tunisia and to determine their resistance to antimicrobials of high importance in humans and animals. 126 fecal samples were collected from healthy...
Article
This study aimed to investigate the impact of management system and lactation stage on camel milk fatty acid (FA) composition, with emphasis on odd and branched-chain FA (OBCFA), conjugated linoleic acids (CLA), and trans-FA (TFA). Milk samples were collected from thirteen camels managed under intensive and semi-intensive systems at early, mid, and...
Article
Full-text available
Comparative study of functional properties, radical scavenging and antimicrobial activities of dromedary whey protein and casein hydrolysates was investigated. Dromedary protein hydrolysates were prepared by treatment with digestive proteases (pepsin and pancreatin) and by the proteolytic system of two lactic acid bacteria (Streptococcus thermophil...
Article
Context The food security of Tunisia is dependent on utilising all of its resources effectively to feed the population. Rangelands used for grazing are subject to continuous degradation, which reduces the availability of feeds to livestock. In the oasis regions, this constraint is attenuated by the systematic use of various by-products of the palm...
Article
Full-text available
This research was conducted to follow our previous research to evaluate the antidiabetic effect of coagulum from camel milk in alloxan diabetic dogs. Diabetes was induced by intravenous injection of alloxan (65 mg/kg bodyweight). The effects of camel milk on diabetic dogs were investigated by observing changes in the glycometabolic index (fasting b...
Chapter
Colostrum is an important source of nutrients and immune factors for the newborn. The nutrient profile and immunological composition of colostrum vary from species to species. The composition and characteristics of the colostrum of human, cows, and goats have been the subject of several studies. The study of the characteristics of camel colostrum i...
Chapter
This chapter aimed to report the strategies and technologies for camel milk preservation. Raw camel milk is easily spoiled owing to its nutrient content, which provides an ideal substrate for the development of microorganisms. Several traditional methods have been conducted in order to increase the shelf life of camel milk including fumigation of m...
Article
This work investigated the antioxidant activities of dromedary colostrum proteins before and after hydrolysis by pepsin, trypsin, α‐chymotrypsin, pancreatin and papain. The enzymatic hydrolysis affected the degrees of hydrolysis, electrophoretic profiles, molecular weight distribution and hydrophobic/hydrophilic properties of the generated peptides...
Article
Full-text available
The valorization of natural resources in small ruminants feeding can reduce the cost of feed and produce good meat quality. The objective was to evaluate the effects of local feed resources on the physico‐chemical aspects, the sensorial characteristics and the fatty acid profile of goat kid's meat. Twenty‐six kids are divided in three groups (avera...
Article
ABSTRACT The aim of this study was to explore the antibacterial peptides derived from dromedary lactoferrin (LFc). The LFc was purified from colostrum using a batch procedure with a cation exchange chromatography support and was hydrolyzed with pepsin to generate peptic digest. This peptic digest was fractionated by cation exchange chromatography,...
Article
Full-text available
The current research paper addresses the hypothesis that management system (grazing vs. stabling) and/or stage of lactation (early- to late-lactation) can influence the lactation performance and milk fatty acid (MFA) profile in dromedary camels. The results obtained revealed that milk and protein yields of stabled camels were higher, while milk fat...
Article
Full-text available
This study was conducted to assess the physicochemical and microbiological status of camel milk from different production systems (intensive, semi-intensive, extensive) and to monitor its quality during the different stages of lactation. Lactic Acid Bacteria (LAB) was also isolated and identified from milk samples from the different production syst...
Article
In Africa, the Cape hare (Lepus capensis) population is under threat from multiple stresses. For its efficient conservation planning, it is crucial to provide comprehensive information on various ecological aspects. To this end, we assessed the dietary composition of the Cape hare in relation to food availability in the North Sahara Desert. The inv...
Preprint
Full-text available
Face to the climatic factors variability and in order to manage seasonal and prolonged droughts, the breeders developed several strategies in southern Tunisia. To ensure their animal feed, they benefit from the favourable seasons to stock reserves by harvesting and drying some local feed such as: spontaneous plant species as natural hay locally kno...
Article
Understanding the effect of habitat characteristics on the distribution of threatened species are fundamental in conservation planning and management. Here, we explore the spatial distribution pattern of display site by the North African Houbara Bustard Chlamydotis undulata undulata males. For this purpose, we examined 81 sites in an area of 255 km...
Article
Understanding herbivore foraging behaviour is crucial for adequate wildlife management decisions. This study assessed the diet composition of free-ranging addax antelope (Addax nasomaculatus (de Blainville, 1816)). Samples collected during the spring season were analyzed using microhistological procedures along with n-alkanes and long-chain alcohol...
Article
Full-text available
Behaviour and diet composition are critical elements in conservation biology within the scope of reintroduction programs. Here we focused on addax (Addax nasomaculatus), a Critically Endangered antelope species, in the Jbil National Park, Tunisia. In this study, we advanced the hypothesis that season, day period, sex and social structure have an ef...
Preprint
Full-text available
Le présent travail vise à une estimation de la digestibilité in vivo des certaines ressources alimentaires locales dans le Sud Tunisien (Khortane, feuilles d'olivier séchées et le Stipa tenacissima en utilisant la méthode des cendres insolubles dans l'acide chlorhydrique «AIA». Quinze(15) chèvres de la population locale (âge moyen = 4 ans et un poi...
Article
Physicochemical and sensory properties of fermented dromedary milk (FDM) and cow milk (FCM) by Enterococcus faecium (W1) or Streptococcus macedonicus (W2), two potent acidifying strains isolated from spontaneous FDM, were assessed and compared. The acidity variation was more pronounced in FDM than in FCM, while FCM showed higher viscosity than that...
Poster
Full-text available
This poster presentation dealt with the fermentation of dromedary (Camelus dromedarius) milk by Lactococcus lactis subsp. cremoris and Streptococcus macedonicus as a potential alternative of cow milk.
Article
This study outlines the importance of integrating spotlighting data and occupancy modelling to estimate the spatial occupancy, abundance and habitat preferences of Cape hares Lepus capensis in southern Tunisia. Exploring the spatial distribution pattern of this species is problematic because of its nocturnal and secretive behaviour. In order to ove...
Article
Full-text available
Background Daily rhythmicity has been observed for a number of hormonal and behavioral variables in mammals. It can be entrained by several external factors, such as light-dark cycle and scheduled feeding. In dromedary camels, daily rhythmicity has been documented only for melatonin secretion and body temperature. In this study, the daily rhythmici...
Data
Camel stable Boxes where the camels were kept.
Data
Diurnality indices for the six behavioral states Each bar indicates the diurnality index for each behavior. The dashed line indicates the theoretical separation between nocturnal and diurnal pattern.
Data
Results of the Cosinor analysis
Article
Full-text available
Les ressources alimentaires locales sont bien valorisées dans l'alimentation animale, même si elles n'ont pas d'effet significatif sur les notes de conformation et sur les mensurations linéaires des carcasses des chevreaux. L'éleveur oriente son choix vers l'aliment le moins coûteux et le plus disponible. Résumé : La valorisation des ressources fou...
Article
Global warming is among the most serious environmental challenges facing ecosystems worldwide, due to rising temperatures and altered precipitation regimes. The North African Sahara Desert is considered to be one of the areas most affected by climate change, which will probably lead to the likely retraction of the Mediterranean ecosystem and an inc...
Article
Full-text available
The main objective of this study was to demonstrate the effect of seminal plasma ovulation inducing factor (OIF) on ovulation in female camels. Seminal plasma was fractionated using gel filtration chromato graphy, and two protein peaks were obtained and analysed by western blotting. The effect of the bioactive protein fraction (OIF/β-NGF) was teste...
Article
Full-text available
The effect of prolificacy on mother-young mutual recognition is still largely unknown in sheep. The aim of the present study was to investigate the ability of prolific ewes to develop an exclusive bond with their neonate and to recognize each other from alien subjects. Observations were performed on 11 D'man and 16 Romanov ewes with, respectively,...
Conference Paper
Full-text available
The objective of this work is to formulate a starter lactic seen application camel milk to prepare fermented product yoghurt. Lactic acid bacteria isolated from camel milk has different characterization tests and selection: morphological study, catalase test, gram stain, use of citrate, acidifying power, lipolytic power and proteolytic power. These...
Article
This study was conducted to determine the prevalence of virulence genes, serogroups, antimicrobial resistance and phylogenetic groups of Escherichia coli strains isolated from diarrheic and healthy camel calves in Tunisia. From 120 fecal samples (62 healthy and 58 diarrheic camel calves aged less than 3 months), 70 E. coli isolates (53 from diarrhe...
Article
Native genetic resource of goats is a pivotal source for meat and milk in southern Tunisia. Feeding is one of the most important activities of goat husbandry. Perceptions on the role of native feed resources for growth and carcass characteristics have not been well studied. Therefore, the present study was designed to help understand and to compare...
Article
Full-text available
This work aims to delimitate and to characterize the pastoral zones of the Dhahar rangelands that promote the camel’s Krafft disease using field investigations with breeders and the geographical information systems in order to establish the map of these zones. The main results show that zones with high risk are characterized by rocky soils with cal...
Article
Full-text available
The camel industry uses traditional (i.e., iron brands and ear tags) and modern (i.e., microchips) identification (ID) systems without having performance results of reference. Previously ironbranded (n = 45; 1 yr) and microchipped (n = 59; 7 yr) camels showed problems of healing (8.6% of brands) and reading (only 42.9% of brands and 69.5% of microc...
Article
Full-text available
This study aimed to test the effects of the three management systems on the behavioral repertoire and particularly on the incidence of stereotypical behavior in restrained camels. Five male camels were tested under the following management systems: (i) unexposed, housing in a single box (Unexpo); (ii) continuous exposure, exposed continuously to fe...
Article
Full-text available
This study aims to determine the relationship between internal and external udder and teat measurements and evaluate their correlation with milk yield and milk partitioning in the udder of dromedary camels. Six Maghrebi camels reared under intensive conditions were monitored at early, middle, and late lactation. Udder measurements included udder de...
Article
Full-text available
Twenty lines of pearl millet ( Pennisetum glaucum L.) used for the production of grain and fodder were evaluated at the Institute of Arid Regions in Médenine, Tunisia. The evaluation work based on nutritive value was carried out in order to be able to group together these lines according to their nutrient richness. The following aspects of the leav...
Article
Full-text available
Un travail d’évaluation de la qualité du fourrage a été effectué sur vingt lignées de mil (Pennisetum glaucum L.) de la collection de l’Institut des Régions Arides de Médenine en Tunisie. L’objectif était de regrouper ces lignées selon leurs richesses en éléments nutritifs. Les analyses suivantes ont été effectuées sur les feuilles, les tiges et la...
Article
Ejaculates from five clinically healthy dromedary camels (Camelus dromedarius) were used to evaluate the effects of different enzymatic treatments (Amylase, Papain, Spermfluid®) on liquefaction and seminal parameters. After collection, ejaculates were divided into 5 aliquots: (1) kept undiluted (control); or diluted 1:1 with: (2) Tris-Citrate-Fruct...
Article
Full-text available
An experiment was conducted to find out the nutritive value of different cuts of goat carcass. Meat samples were obtained from goat kids in Tunisia. Twenty-six indigenous kids were divided into three groups: oat hay (control), dried olive leaves + dried Stipa tenacissima, and grass hay. The cuts were the shoulder, chest, and leg of each goat carcas...