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STUDY ON MILK STIMULATION INTERVAL IN CAMEL USING THE NOMADIC TRADITIONAL METHOD

Sat, 01 Dec 2012 00:00:00 GMT

Titre: STUDY ON MILK STIMULATION INTERVAL IN CAMEL USING THE NOMADIC TRADITIONAL METHOD Auteur(s): EISA Mohamed Osman; ABU NIKHAILA Abd Elmoneim Mukhtar; ABD EL MAJID Ali Mohamed; ABDEL MONIEM Mahmoud Ali El hag Résumé: 16 she-camels were chosen from a large herd of camel belonging to the Lahween tribe in Eastern Sudan. The breed is known locally as (Arabi-Lahwee). This study was thus initiated to identify the actual time needed to stimulate the milk let-down reflex by introduction of the calf and to investigate on the effect of parity orders, dams body weight and time of milking on milk stimulation interval. Neither parity order, body weight groups nor day hours (morning and evening) not showed any sig. impact on milk stimulation interval (MSI). For the 3rd, 4th and 5th parity orders MSI was 116.4+21.5, 127.0+42.8 and 109.8+7.7 seconds, respectively (means 116.3+12.7 seconds). Body weight groups scored 113.8+18.2 and 118.9+18.9 seconds for <500 and >500 kg, respectively, and at morning and evening time reported 68.1+5.4 and 70.9+73 seconds, respectively as MSI. Milk yield (MY) (912+119.6 ml), milking duration (MD) (78.2+4.2 sec.), udder measurements including size, depth, circumference, teat length and diameter showed negative and non-sig. correlation with MSI. While body weight (517.9+19.3 kg) was positively and sig. (P < 0.05) correlated and milk flow rate (11.7+1.3 ml/sec) reported positive and non-sig. correlation with MSI. Sig. (P<0.01) variations in the measurements of the udder depth, circumference, size, teat length and teat diameter before and after milking were observed. Description: Algerian Journal of Arid And Environment (AJAE)

ETUDE COMPARATIVE DE LA PRODUCTION D’ÉTHANOL BRUT À PARTIR DE TROIS VARIÉTÉS DE DATTES COMMUNES (DEGLA BEIDA, TACHERWIT ET HAMRAYA) REPARTIES DANS LES DIFFÉRENTES CLASSES DE DATTES (MOLLE, DEMI-MOLLE ET SÈCHE) DE LA CUVETTE DE OUARGLA (SAHARA SEPTENTRIONAL EST ALGÉRIEN)

Sat, 01 Dec 2012 00:00:00 GMT

Titre: ETUDE COMPARATIVE DE LA PRODUCTION D’ÉTHANOL BRUT À PARTIR DE TROIS VARIÉTÉS DE DATTES COMMUNES (DEGLA BEIDA, TACHERWIT ET HAMRAYA) REPARTIES DANS LES DIFFÉRENTES CLASSES DE DATTES (MOLLE, DEMI-MOLLE ET SÈCHE) DE LA CUVETTE DE OUARGLA (SAHARA SEPTENTRIONAL EST ALGÉRIEN) Auteur(s): OULD EL HADJ Mohamed Didi; CHEICK Mohamed; HAMDI Wassila; SAYAH Zineb; BOUAZIZ Sabrina Résumé: The production of alcool from the three varieties of common dates (Degla Beida, Tacherwit and Hamraya) divided according to three categories of dates (dry, semi-soft and soft) for the Ouargla basin has been studied. The total sugar amount of the must of these different cultivars is 11,00+0,21 of sugar for Hamraya (soft), 11,3+0,12% of sugar for Tacherwit (semi-soft) and 11,60+0,26% of sugar for Degla Beida (dry). After fermentation through the yeast Saccharomyces cerevisiae these solutions titrate 7,8+1,3° to 9,5+1,61° of brut alcohol. The return in alcohol is respectively of 81,82+4,50% for the dry variety, for the semi-soft variety and 70,90+3,69% for the soft variety. The dates effect is fonction of the sugar nature wich have à notable action on the evolution of rapport coproduced alcohol consumed sugar. The more the date is rich of saccharose, the more it’s but alcohol production is hight. Nevertheless, the griding dates during the preparation amount is indispensable for good yieldin alcohol. Description: Algerian Journal of Arid And Environment (AJAE)

CARACTÉRISATIONS PHYSICO-CHIMIQUE, ENVIRONNEMENTALE ET ÉNERGÉTIQUE DE LA BIOMÉTHANISATION INDUSTRIELLE AVICOLE EN TUNISIE SEMI-ARIDE

Sat, 01 Dec 2012 00:00:00 GMT

Titre: CARACTÉRISATIONS PHYSICO-CHIMIQUE, ENVIRONNEMENTALE ET ÉNERGÉTIQUE DE LA BIOMÉTHANISATION INDUSTRIELLE AVICOLE EN TUNISIE SEMI-ARIDE Auteur(s): M’SADAK Youssef; ZOGHLAMI Rahma Inès Résumé: This investigation, undertaken in Context Tunisian Semi-arid is to evaluate the methane fermentation applied to biomass poultry, established at the pilot industrial digester in Hammam Sousse (Sousse Governorate). Monitoring the digester, with a useful capacity of 300 m3, focused, firstly, on the determination of the characteristics of the poultry effluent by the analysis of two physic-chemical parameters (pH and Dry Matter: DM) and two environmental parameters (Suspended Solids: SS and Biological Oxygen Demand: BOD5), and secondly, on the energy evaluation of qualitative productivity (biomethane composition and calorific value) of produced biogas.This investigation has identified some observations which can reveal principally: - the best records of remediation, about SS and DBO5, are observed at tailings pond of the studied installation. - the interest in the use of the biogas produced conditioning was confirmed by comparing the results before and after treatment as well as on the biomethane content (CH4%) than on the lower calorific value (PCI). - the biomethanation installation requires some consolidations, generally considered better for the remediation of droppings poultry, improved energy productivity and better agronomic recovery of solid and liquid generated waste. Description: Algerian Journal of Arid And Environment (AJAE)

PARAMÈTRES ÉCOLOGIQUES DES RONGEURS RECENSÉS DANS UN MILIEU SEMI ARIDE À DJELFA (ALGÉRIE)

Sat, 01 Dec 2012 00:00:00 GMT

Titre: PARAMÈTRES ÉCOLOGIQUES DES RONGEURS RECENSÉS DANS UN MILIEU SEMI ARIDE À DJELFA (ALGÉRIE) Auteur(s): SOUTTOU Karim; SEKOUR Makhlouf; GOUISSEM Kheira; GUEZOUL Omar; DOUMANDJI Salaheddine; DENYS Christiane Résumé: Trapping conducted in farmland area at Taâdmit from the July 9, 2009 until March 9, 2010 totaled 925 nights traps. This trap has captured 80 individuals. The total number of species recorded was 8 species which are divided between two families, Muridae with that of two subfamilies and of Dipodidae. The subfamily Gerbillinae is best represented, comprising the genus Gerbillus with species Gerbillus campestris, Gerbillus nanus (4; 5%) and Gerbillus gerbillus (8.8%). The genus Meriones is represented by one species Meriones shawii which best represented among all the species recorded with 55 individuals (68.8 %). While the Murinae are represented by Mus musculus (6.3%) and Mus spretus (5%). The family of Dipodidae is represented by Jaculus orientalis (4%). Description: Algerian Journal of Arid And Environment (AJAE)