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801.
802.
C P Blanc 《Archives de l'Institut Pasteur de Tunis》1979,56(1-2):57-65
The four species of the g. Acanthodactylus Wieg., 1834 occuring in Tunisia are quite individualized by their biometrical relations which, moreover, allow to bring out their relationships. The size of the upper quarter in our sampling oppose two groups of two species each one. The distribution of the ratio between the length of the body and that of the tail place apart A. boskianus from the three other species in a more marked way for adults of both sexes than for juveniles. 相似文献
803.
Protein and energy needs for maintenance and growth of Nile tilapia (Oreochromis niloticus) 总被引:1,自引:1,他引:0
S. J. Kaushik T. Doudet F. Médale P. Aguirre D. Blanc 《Zeitschrift fur angewandte Ichthyologie》1995,11(3-4):290-296
A trial was undertaken with juvenile Nile tilapia fed graded levels of dietary protein (0–35% DP) over 7 weeks (28°C). Measurements of nitrogen and energy utilization were made using data on ADC, comparative carcass analyses, nitrogen excretion and oxygen uptake. Data indicate that the daily protein intake for maximum N gain was c. 12 g/kg/d and the maintenance protein requirements were about of 2g/kg/d. The optimal DP/DE ratio was found to be 18mg/kJ. Differences were observed in the data on endogenous nitrogen and energy utilization depending on the dietary treatments as well as on the criteria used. 相似文献
804.
A variety of autotrophic, sulfur- and hydrogen-oxidizing thermophilic bacteria were isolated from thermogenic composts at
temperatures of 60–80° C. All were penicillin G sensitive, which proves that they belong to the Bacteria domain. The obligately
autotrophic, non-spore-forming strains were gram-negative rods growing at 60–80°C, with an optimum at 70–75°C, but only under
microaerophilic conditions (5 kPa oxygen). These strains had similar DNA G+C content (34.7–37.6 mol%) and showed a high DNA:DNA
homology (70–87%) with Hydrogenobacter strains isolated from geothermal areas. The facultatively autotrophic strains isolated from hot composts were gram-variable
rods that formed spherical and terminal endospores, except for one strain. The strains grew at 55–75° C, with an optimum at
65–70° C. These bacteria were able to grow heterotrophically, or autotrophically with hydrogen; however, they oxidized thiosulfate
under mixotrophic growth conditions (e.g. pyruvate or hydrogen plus thiosulfate). These strains had similar DNA G+C content
(60–64 mol%) to and high DNA:DNA homology (> 75%) with the reference strain of Bacillus schlegelii. This is the first report of thermogenic composts as habitats of thermophilic sulfur- and hydrogen-oxidizing bacteria, which
to date have been known only from geothermal manifestations. This contrasts with the generally held belief that thermogenic
composts at temperatures above 60° C support only a very low diversity of obligatory heterotrophic thermophiles related to
Bacillus stearothermophilus.
Received: 20 July 1995 / Accepted: 25 September 1995 相似文献
805.
Cédric Blanc Steve J. Charette Sara Mattei Laurence Aubry Ewan W. Smith Pierre Cosson François Letourneur 《Traffic (Copenhagen, Denmark)》2009,10(2):161-171
Sorting of ubiquitinated proteins to multivesicular bodies (MVBs) in mammalian cells relies on proteins with a Vps27/Hrs/STAM (VHS) domain. Here, we show that the amoeba Dictyostelium presents only one protein with a VHS domain: DdTom1. We demonstrate that the VHS domain of DdTom1 is followed by a Golgi-localized, γ-ear-containing, ADP-ribosylation-factor-binding and Tom1 (GAT) domain that binds ubiquitin, and by a non-conserved C-terminal domain that can recruit clathrin, EGFr pathway substrate 15 and tumor susceptibility gene 101, a component of the MVB biogenesis machinery [endosomal complexes required for transport (ESCRT) complexes]. Both VHS and GAT domains interact with phospholipids and therefore could ensure the recruitment of DdTom1 to endosomal membranes. We propose that DdTom1 participates in an ancestral ESCRT-0 complex implicated in the sorting of ubiquitinated proteins into MVBs. 相似文献
806.
The Tropical managed Forests Observatory: a research network addressing the future of tropical logged forests
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Plinio Sist Ervan Rutishauser Marielos Peña-Claros Alexander Shenkin Bruno Hérault Lilian Blanc Christopher Baraloto Fidèle Baya Fabrice Benedet Katia Emidio da Silva Laurent Descroix Joice Nunes Ferreira Sylvie Gourlet-Fleury Marcelino Carneiro Guedes Ismail Bin Harun Riina Jalonen Milton Kanashiro Haruni Krisnawati Mrigesh Kshatriya Philippa Lincoln Lucas Mazzei Vincent Medjibé Robert Nasi Marcus Vinicius N. d'Oliveira Luis C. de Oliveira Nicolas Picard Stephan Pietsch Michelle Pinard Hari Priyadi Francis. E. Putz Ken Rodney Vivien Rossi Anand Roopsind Ademir Roberto Ruschel Nur Hajar Zamah Shari Cintia Rodrigues de Souza Farida Herry Susanty Eleneide Doff Sotta Marisol Toledo Edson Vidal Thales A.P. West Verginia Wortel Toshihiro Yamada 《应用植被学》2015,18(1):171-174
While attention on logging in the tropics has been increasing, studies on the long-term effects of silviculture on forest dynamics and ecology remain scare and spatially limited. Indeed, most of our knowledge on tropical forests arises from studies carried out in undisturbed tropical forests. This bias is problematic given that logged and disturbed tropical forests are now covering a larger area than the so-called primary forests. A new network of permanent sample plots in logged forests, the Tropical managed Forests Observatory (TmFO), aims to fill this gap by providing unprecedented opportunities to examine long-term data on the resilience of logged tropical forests at regional and global scales. TmFO currently includes 24 experimental sites distributed across three tropical regions, with a total of 490 permanent plots and 921 ha of forest inventories. 相似文献
807.
808.
The lower Senonian of Central Aquitaine includes few calcareous algae, alone green algae, while the upper Senonian admits nothing but numerous red algae.A new species has been discovered (Lithothamnium villaegranis n. sp.). Solenomeris, generally frequent in the Paleocene deposits, has been identified in the maestrichtian levels. 相似文献
809.
810.
Contrary to other unisexual vertebrates except a little-known fossorial snake, the Indo-Pacific anthropophilous, parthenogenetic lacertilian Lipododactylus lugubris is vastly more widespread than its bisexual relatives. At the same time, it shows negligible enzyme polymorphism and low overall heterozygosity in its usual diploid condition, which suggests the possibility that hybridization did not intervene when thelytoky was brought about. Clones are in much higher proportion among the sympatric triploids, but they too have a low relative heterozygosity, compounded by gene dosage restriction since no more than two out of the three alleles have been found expressed at any locus. Isozyme data suggest an origin of the complex in South East Asia, which conclusion is substantiated by the presence of a bisexual sibling species in the Philippine Islands. 相似文献