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81.
Xiao-Yu Geng Ming-Ke Wang Jin-Hong Chen Liang Xiao Ji-Shun Yang 《World journal of biological chemistry》2023,14(1):1-12
The marine environment can be extremely dangerous, and the harm caused by marine organisms when they contact the human body can be especially harmful, even deadly. Contact includes stings, bites, wounds, and consumption as food. In this article, the characteristics of the common marine biological injuries are summarized, the major marine organisms causing damage in China’s marine waters are described, and injury prevention and treatment methods are discussed. 相似文献
82.
Jean Vacelet Benoît Verdenal Guy Perinet 《Biology of the cell / under the auspices of the European Cell Biology Organization》1988,62(2):189-198
Lepidocrocite (γ FeOOH) granules are frequently found in the spongin fibers of some horny sponges. The granules also contain calcite and a small amount of goethite (α FeOOH). In the genus Spongia, the amount of iron is highly variable according to the habitat and to the age of the fiber. Some indications about the skeletal growth and structure can be inferred from the distribution of the biominerals and the arrangement of the crystallites: i.e. (1) Mineralization is a slow process in comparison with fiber formation; (2) Secondary connective fibers may have a discontinuous growth; (3) The collagen microfibrils display a definite arrangement in the successive spongin layers; (4) Although spongin is a collagen highly resistant in vitro to enzymatic digestion, the sponge is able to perform remodeling of its skeleton through autodigestion of the fibers. 相似文献
83.
84.
85.
Marine Pseudoalteromonas species are associated with higher organisms and produce biologically active extracellular agents 总被引:12,自引:0,他引:12
The newly established genus Pseudoalteromonas contains numerous marine species which synthesize biologically active molecules. The production of a range of compounds which are active against a variety of target organisms appears to be a unique characteristic for this genus and may greatly benefit Pseudoalteromonas cells in their competition for nutrients and colonization of surfaces. Species of Pseudoalteromonas are generally found in association with marine eukaryotes and display anti-bacterial, bacteriolytic, agarolytic and algicidal activities. Moreover, several Pseudoalteromonas isolates specifically prevent the settlement of common fouling organisms. While a wide range of inhibitory extracellular agents are produced, compounds promoting the survival of other marine organisms living in the vicinity of Pseudoalteromonas species have also been found. 相似文献
86.
在大鳞Lizamacrolepis鳃上检获到鲻鱼虫属1新种,小钩鲻鱼虫,新种LigophorushamulosusPan&Zhang,sp.nov.。以其后吸器两对中央大钩的形态结构以及背、腹中央大钩量度上的差异,背联结片的结构和交接器形态结构不同而区别于LigophorusimitansEuzet&Suriano,1977。 相似文献
87.
Significance of Na+ in the fish pathogen, Vibrio anguillarum, under energy depleted condition 总被引:2,自引:0,他引:2
Vibrio anguillarum kills various kinds of fish over salinities ranging from seawater to freshwater. In this study, we investigated the role of Na(+) in V. anguillarum, especially under energy-depleted conditions such as in natural seawater. V. angustum S14, which is a typical marine vibrio, was used for comparison. V. anguillarum only required Na(+) for starvation-survival, but in contrast, V. angustum S14 always required Na(+) for both growth and starvation-survival. In marine vibrios, Na(+) is used in the Na(+)-dependent respiratory chain that produces the sodium motive force (SMF) across the cell membrane. It has been considered that marine vibrios always need a SMF produced by Na(+), however in the case of V. anguillarum, the SMF is not required for growth, but becomes more important for starvation-survival. 相似文献
88.
Jost C Lawrence CA Campolongo F van de Bund W Hill S DeAngelis DL 《Theoretical population biology》2004,66(1):37-51
Recognition of the microbial loop as an important part of aquatic ecosystems disrupted the notion of simple linear food chains. However, current research suggests that even the microbial loop paradigm is a gross simplification of microbial interactions due to the presence of mixotrophs-organisms that both photosynthesize and graze. We present a simple food web model with four trophic species, three of them arranged in a food chain (nutrients-autotrophs-herbivores) and the fourth as a mixotroph with links to both the nutrients and the autotrophs. This model is used to study the general implications of inclusion of the mixotrophic link in microbial food webs and the specific predictions for a parameterization that describes open ocean mixed layer plankton dynamics. The analysis indicates that the system parameters reside in a region of the parameter space where the dynamics converge to a stable equilibrium rather than displaying periodic or chaotic solutions. However, convergence requires weeks to months, suggesting that the system would never reach equilibrium in the ocean due to alteration of the physical forcing regime. Most importantly, the mixotrophic grazing link seems to stabilize the system in this region of the parameter space, particularly when nutrient recycling feedback loops are included. 相似文献
89.
90.
A 24 kb plasmid, pBFp1, encoding mercury resistance was previously isolated from a marine biofilm. Isolation and sequencing of a 4280 bp DNA fragment containing the plasmid replicon (rep-pBFp1) revealed a putative open reading frame encoding a RepA protein and an oriV-like region containing an A+T rich sub-region, iterons, and DnaA boxes. Sequence comparisons showed significant similarities to the incW plasmid pSa both for the RepA amino acid sequence and in the iteron DNA sequence. Plasmid pBFp1 was also shown to be incompatible with pSa in standard incompatibility testing. A probe from the repA gene of pBFp1 was further made and tested on a collection of plasmids exogenously isolated from marine habitats in a previous study. 相似文献