Rumen ciliate protozoal fauna of native sheep, friesian cattle and dromedary camel in Libya.     

H M Selim  S Imai  A K el Sheik  H Attia  E Okamoto  E Miyagawa  Y Maede 《The Journal of veterinary medical science / the Japanese Society of Veterinary Science》1999,61(3):303-305

Rumen ciliate species and composition were surveyed on the native sheep, Friesian-cattle and dromedary (one-humped) camels kept in Libya. As a result of survey, 5 genera including 14 species with 5 formae in native sheep, 9 genera including 27 species with 6 formae in Friesian-cattle and 6 genera including 13 species and 7 formae in dromedary camels were identified. All of the ciliate species and their percentage composition detected from the Libyan sheep and cattle in this examination were similar to those found from corresponding animals in the other countries. Libyan camels lacked some peculiar ciliate species found from camels in the other countries, but had many cosmopolitan species common with those in the domestic ruminants, suggesting that ciliate faunae of camel are easily affected by the other domestic ruminants kept together. The ciliate density was estimated as 105/ml in every host species.  相似文献   

Death and Transfiguration of a Triple Junction in the South Atlantic     

M Ligi  E Bonatti  G Bortoluzzi  G Carrara  P Fabretti  D Penitenti  D Gilod  AA Peyve  S Skolotnev  N Turko 《Science (New York, N.Y.)》1997,276(5310):243-245

Three major lithospheric plates-Antarctic, South American, and African-meet in the South Atlantic near Bouvet Island where the Mid-Atlantic Ridge (MAR), the Southwest Indian Ridge (SWIR), and the American Antarctic Ridge converge toward a fast evolving triple junction. A major magmatic pulse has recently built a new, swollen segment of the SWIR (Spiess Ridge) that is propagating toward the MAR at a rate of 4 to 5 centimeters per year, disrupting a former ridge-ridge-ridge (RRR) triple junction. A new triple junction will be established about 70 kilometers to the north when the propagating SWIR/Spiess segment will impact with the MAR, probably within the next 1 million years. The American Antarctic Ridge will take advantage of the MAR/SWIR duel by capturing an approximately 70-kilometer stretch of MAR, whereas the Antarctic plate will increase its size.  相似文献   

An Analysis of Hiker Preparedness: A Survey of Hiker Habits in New Hampshire     

Ryan C. Mason  Selim Suner  Kenneth A. Williams 《The Forestry Chronicle》2013,24(3):221-227

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Protective efficacy of H5 inactivated vaccines in meat turkey poults after challenge with Egyptian variant highly pathogenic avian influenza H5N1 virus     

Kilany WH  Abdelwhab EM  Arafa AS  Selim A  Safwat M  Nawar AA  Erfan AM  Hassan MK  Aly MM  Hafez HM 《Veterinary microbiology》2011,150(1-2):28-34

In contrast to chickens, there is a paucity of information on the potency of H5 vaccines to protect turkeys against the highly pathogenic avian influenza (HPAI) H5N1 virus infections. In this study, 4 groups, 10 turkey poults each, were vaccinated at seven days old with one of H5N2 or H5N1 commercial vaccines or one of two prepared H5N1 vaccines from a local Egyptian variant HPAI H5N1 (EGYvar/H5N1) strain. At 35 days age, all vaccinated and 10 non vaccinated birds were challenged intranasal with 10(6) EID(50)/0.1 ml of EGYvar/H5N1. All vaccines used in this study were immunogenic in turkeys. There was no cross reaction between the commercial vaccines and the Egyptian variant H5N1 antigen as obtained by the hemagglutination inhibition test. Birds vaccinated with H5N2 vaccine were died, while other H5N1 vaccinated groups have had 20-40% mortality. The highest virus excretion was found in non-vaccinated infected and H5N2 vaccinated birds. Eleven peculiar amino acid substitutions in H5 protein of the variant strain were existed neither in the vaccine strains nor in the earliest H5N1 virus introduced into Egypt in 2006. In conclusion, single vaccination at seven days old is inadequate for protection of meat turkeys against variant HPAI H5N1 challenge and multi-dose vaccination at older age is recommended. For the foreseeable future, continuous evaluation of the current vaccines in H5N1 endemic countries in the face of virus evolution is a paramount challenge to mitigate the socio-economic impact of the virus.  相似文献   

Protective and curative efficacy of prothioconazole against isolates of Mycosphaerella graminicola differing in their in vitro sensitivity to DMI fungicides     

Jean Sanssené  Sameh Selim  Céline Roisin‐Fichter  Lynda Djerroud  Caroline Deweer  Patrice Halama 《Pest management science》2011,67(9):1134-1140

BACKGROUND: Septoria leaf blotch is the most important disease of wheat in Europe. To control this disease, fungicides of the 14α‐demethylase inhibitor group (DMIs) have been widely used for more than 20 years. However, resistance towards DMIs has increased rather quickly in recent years. The objective of this study was to evaluate, on plants and under controlled conditions, the protective and curative efficacy of the DMI fungicide prothioconazole against three current isolates of M. graminicola, chosen to belong to different DMI‐resistant phenotypes. Fungicide efficacy was assessed by visual symptoms and by quantitative real‐time polymerase chain reaction (PCR). RESULTS: With a protective fungicide application, prothioconazole was always effective against each isolate. This was in accordance with the EC₅₀ results. However, curative efficacy differed between the isolates. It remained at a good level, between 60 and 70% against one isolate, whereas it was strongly affected by late applications from 7 days post‐inoculation with the two other isolates. CONCLUSION: A protective application of prothioconazole in wheat crops could be the best strategy to keep a high efficacy against Septoria leaf blotch. Copyright © 2011 Society of Chemical Industry  相似文献   

Seroprevalence of bovine leukemia virus in cattle,buffalo, and camel in Egypt     

Selim  Abdelfattah  Marawan  Marawan A.  Ali  Abdel-Fattah  Manaa  Eman  AbouelGhaut  Hassab Allah 《Tropical animal health and production》2020,52(3):1207-1210

Tropical Animal Health and Production - Bovine leukemia virus (BLV) is the causative agent of enzootic bovine leukosis. It causes significant economic losses associated with losses due to slaughter...  相似文献   

Physical characteristics of cherry (Prunus avium) varieties and shape analysis with the elliptic Fourier method     

Demir  Bünyamin  Sayıncı  Bahadır  Elkıran  Selim 《Erwerbs-Obstbau》2022,64(2):171-181

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Haloarchaea as Cell Factories to Produce Bioplastics     

Lorena Sim-Cabrera  Salvador García-Chumillas  Nashwa Hagagy  Amna Saddiq  Hend Tag  Samy Selim  Hamada AbdElgawad  Alejandro Arribas Agüero  Fuensanta Monz Snchez  Vernica Cnovas  Carmen Pire  Rosa María Martínez-Espinosa 《Marine drugs》2021,19(3)

Plastic pollution is a worldwide concern causing the death of animals (mainly aquatic fauna) and environmental deterioration. Plastic recycling is, in most cases, difficult or even impossible. For this reason, new research lines are emerging to identify highly biodegradable bioplastics or plastic formulations that are more environmentally friendly than current ones. In this context, microbes, capable of synthesizing bioplastics, were revealed to be good models to design strategies in which microorganisms can be used as cell factories. Recently, special interest has been paid to haloarchaea due to the capability of some species to produce significant concentrations of polyhydroxyalkanoate (PHA), polyhydroxybutyrate (PHB), and polyhydroxyvalerate (PHV) when growing under a specific nutritional status. The growth of those microorganisms at the pilot or industrial scale offers several advantages compared to that of other microbes that are bioplastic producers. This review summarizes the state of the art of bioplastic production and the most recent findings regarding the production of bioplastics by halophilic microorganisms with special emphasis on haloarchaea. Some protocols to produce/analyze bioplastics are highlighted here to shed light on the potential use of haloarchaea at the industrial scale to produce valuable products, thus minimizing environmental pollution by plastics made from petroleum.  相似文献   

Antibacterial activity of Ludwigia adscendens     

Ahmed F  Selim MS  Shilpi JA 《Fitoterapia》2005,76(5):473-475

Methanolic extract of whole plants of Ludwigia adscendens was studied for its antibacterial activity. The extract showed a broad spectrum of antibacterial activity against all the bacteria tested except Stapylococcus aureus.  相似文献   

Gas-liquid chromatographic determination of dehydroacetic acid in squash and wine     

D H Daniels  C R Warner  S Selim  F L Joe 《Journal of the Association of Official Analytical Chemists》1983,66(4):893-896

A gas-liquid chromatographic procedure has been developed for the determination of the preservative dehydroacetic acid (DHA) in frozen cut squash and white wine. The cleanup procedure uses the acidic character of DHA to enhance separation from interfering substances. Recoveries were 93-104% from squash fortified at 30, 65, and 130 ppm and 96-99% from wine fortified at 50, 100, and 200 ppm. The method can be used to establish that the amount of DHA used in squash does not exceed the permissible level of 65 ppm.  相似文献