OXYGEN POISONING IN THE ANNELID<i>TUBIFEX TUBIFEX</i>I. RESPONSE TO OXYGEN EXPOSURE

Walker, Joanne G.

doi:10.2307/1540205

Cited by 16 publications

(10 citation statements)

References 26 publications

(22 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…We use "aggregation" to refer to the growth of these domains from individual worms. The biological function of this aggregation is to minimize exposure to dissolved oxygen, high levels of which are poisonous to tubifex [31]. The worms cling together by entanglement, which is aided by small bristles on their bodies [32].…”

mentioning

confidence: 99%

Phase Separation by Entanglement of Active Polymerlike Worms

et al. 2020

View full text Add to dashboard Cite

We investigate the aggregation and phase separation of thin, living T. tubifex worms that behave as active polymers. Randomly dispersed active worms spontaneously aggregate to form compact, highly entangled blobs, a process similar to polymer phase separation, and for which we observe power-law growth kinetics. We find that the phase separation of active polymerlike worms does not occur through Ostwald ripening, but through active motion and coalescence of the phase domains. Interestingly, the growth mechanism differs from conventional growth by droplet coalescence: the diffusion constant characterizing the random motion of a worm blob is independent of its size, a phenomenon that can be explained from the fact that the active random motion arises from the worms at the surface of the blob. This leads to a fundamentally different phase-separation mechanism that may be unique to active polymers.

show abstract

mentioning

confidence: 99%

Phase Separation by Entanglement of Active Polymerlike Worms

et al. 2020

View full text Add to dashboard Cite

show abstract

“…T. tnbife.v was exposed to four atmospheres absolute oxygen pressure by the procedures described previously (Walker, 1970). The water used in this study both for worm exposures and for preparation of reagents was tap water which had passed through activated charcoal filters and to which 0.05 g disodium dihydrogen ethylenediamine tetraacetic acid (versene, Hach Chemical Co.) per liter was then added.…”

Section: Methodsmentioning

confidence: 99%

“…

MATERIALS AND METHODST.

…”

mentioning

confidence: 99%

OXYGEN POISONING IN THE ANNELIDTUBIFEX TUBIFEX. II. OSMOTIC PROTECTION

Walker¹

1971

The Biological Bulletin

Self Cite

View full text Add to dashboard Cite

Walker (1970) studied the effects of hyperbaric oxygen on Tnbife.v titbifc.r, an Annelid normally living' in environments with extremely low oxygen tensions. These animals were killed by exposure to four atmospheres absolute oxygen pressure for 15 hours but recovered from exposures of up to eight hours or when longer exposures were interrupted by a sufficient interval at atmospheric conditions (Walker, 1970). In the present study the ability of various agents to modify the toxic effects of oxygen on T. tnbife.v has been investigated. MATERIALS AND METHODST. tnbife.v was exposed to four atmospheres absolute oxygen pressure by the procedures described previously (Walker, 1970). The water used in this study both for worm exposures and for preparation of reagents was tap water which had passed through activated charcoal filters and to which 0.05 g disodium dihydrogen ethylenediamine tetraacetic acid (versene, Hach Chemical Co.) per liter was then added.

show abstract

“…The Tubifex ingests sediment particles and feeds on fine organic matter [19]. It can live in a wide variety of aquatic environments, ranging from pure undernourished water to hypereutrophic water [20], and can survive in a heavily polluted environment [21]. Higher organisms, such as fish, feed on Tubifex, and therefore, the sediment-related pollutants get transferred easily to higher trophic levels through the food chain [22,23].…”

Section: Introductionmentioning

confidence: 99%

Effects of Dufulin on Oxidative Stress and Metabolomic Profile of Tubifex

Zhu

Yang

et al. 2021

Metabolites

View full text Add to dashboard Cite

Dufulin is a highly effective antiviral pesticide used in plants. In this study, a seven-day experiment was conducted to evaluate the effects of Dufulin at five different concentrations (1 × 10−4, 1 × 10−3, 1 × 10−2, 0.1, and 1 mg/L) on Tubifex. LC-MS-based metabolome analysis detected a total of 5356 features in positive and 9110 features in negative, of which 41 showed significant changes and were identified as differential metabolites. Four metabolic pathways were selected for further study. Detailed analysis revealed that Dufulin exposure affected the urea cycle of Tubifex, probably via argininosuccinate lyase (ASL) inhibition. It also affected the fatty acid metabolism, leading to changes in the concentration of free fatty acids in Tubifex. Furthermore, the changes in metabolites after exposure to Dufulin at 1 × 10−2 mg/L were different from those at the other concentrations.

show abstract

OXYGEN POISONING IN THE ANNELIDTUBIFEX TUBIFEXI. RESPONSE TO OXYGEN EXPOSURE

Cited by 16 publications

References 26 publications

Phase Separation by Entanglement of Active Polymerlike Worms

Phase Separation by Entanglement of Active Polymerlike Worms

OXYGEN POISONING IN THE ANNELIDTUBIFEX TUBIFEX. II. OSMOTIC PROTECTION

Effects of Dufulin on Oxidative Stress and Metabolomic Profile of Tubifex

Contact Info

Product

Resources

About