High Tolerance and Delayed Responses of Daphnia magna to Neonicotinoid Insecticide Imidacloprid: Toxicokinetic and Toxicodynamic Modeling

Huizhen Li; Qingjun Zhang; Hang Su; Jing You; Wen-Xiong Wang

doi:10.1021/acs.est.0c05664

Toxicity assessments with Daphnia magna of Guadipyr, a new neonicotinoid insecticide and studies of its effect on acetylcholinesterase (AChE), glutathione S-transferase (GST), catalase (CAT) and chitobiase activities

Ecotoxicology and Environmental Safety ◽

10.1016/j.ecoenv.2013.09.013 ◽

2013 ◽

Vol 98 ◽

pp. 339-344 ◽

Cited By ~ 31

Author(s):

Suzhen Qi ◽

Chen Wang ◽

Xiaofeng Chen ◽

Zhaohai Qin ◽

Xuefeng Li ◽

...

Keyword(s):

Daphnia Magna ◽

Glutathione S Transferase ◽

Neonicotinoid Insecticide

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Effects of neonicotinoid insecticide formulations and their components on Daphnia magna – the role of active ingredients and co-formulants

International Journal of Environmental & Analytical Chemistry ◽

10.1080/03067319.2017.1363196 ◽

2017 ◽

Vol 97 (9) ◽

pp. 885-900 ◽

Cited By ~ 11

Author(s):

Eszter Takács ◽

Szandra Klátyik ◽

Mária Mörtl ◽

Gergely Rácz ◽

Krisztina Kovács ◽

...

Keyword(s):

Daphnia Magna ◽

Active Ingredients ◽

Neonicotinoid Insecticide

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Membrane-bound vesicles associated with the microvilli in the midgut of the freshwater microcrustacean, Daphnia magna

Proceedings, annual meeting, Electron Microscopy Society of America ◽

10.1017/s0424820100076135 ◽

1983 ◽

Vol 41 ◽

pp. 480-481

Author(s):

Patricia L. Jansma

Keyword(s):

Daphnia Magna ◽

Intestinal Epithelial Cells ◽

Uranyl Acetate ◽

Intestinal Epithelial ◽

Chlamydomonas Reinhardii ◽

Thin Sections ◽

Saturated Water ◽

Cacodylate Buffer ◽

Membrane Bound ◽

Ethanol Series

The presence of the membrane bound vesicles or blebs on the intestinal epithelial cells has been demonstrated in a variety of vertebrates such as chicks, piglets, hamsters, and humans. The only invertebrates shown to have these microvillar blebs are two species of f1ies. While investigating the digestive processes of the freshwater microcrustacean, Daphnia magna, the presence of these microvillar blebs was noticed.Daphnia magna fed in a suspension of axenically grown green alga, Chlamydomonas reinhardii for one hour were narcotized with CO2 saturated water. The intestinal tracts were excised in 2% glutaraldehyde in 0.2 M cacodyl ate buffer and then placed in fresh 2% glutaraldehyde for one hour. After rinsing in 0.1 M cacodylate buffer, the sample was postfixed in 2% OsO4, dehydrated with a graded ethanol series, infiltrated and embedded with Epon-Araldite. Thin sections were stained with uranyl acetate and Reynolds lead citrate before viewing with the Philips EM 200.

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Computer Reconstruction of the Cellular Architecture of the Daphnia Magna Optic Ganglion

Proceedings, annual meeting, Electron Microscopy Society of America ◽

10.1017/s0424820100115043 ◽

1975 ◽

Vol 33 ◽

pp. 284-285

Author(s):

E. R. Macagno ◽

C. Levinthal

Keyword(s):

Daphnia Magna ◽

Genetic Background ◽

Compound Eye ◽

Synaptic Connectivity ◽

Serial Sections ◽

Cross Sectional ◽

Small Crustacean ◽

Optic Ganglion ◽

Structural Invariance ◽

High Degree

The optic ganglion of Daphnia Magna, a small crustacean that reproduces parthenogenetically contains about three hundred neurons: 110 neurons in the Lamina or anterior region and about 190 neurons in the Medulla or posterior region. The ganglion lies in the midplane of the organism and shows a high degree of left-right symmetry in its structures. The Lamina neurons form the first projection of the visual output from 176 retinula cells in the compound eye. In order to answer questions about structural invariance under constant genetic background, we have begun to reconstruct in detail the morphology and synaptic connectivity of various neurons in this ganglion from electron micrographs of serial sections (1). The ganglion is sectioned in a dorso-ventra1 direction so as to minimize the cross-sectional area photographed in each section. This area is about 60 μm x 120 μm, and hence most of the ganglion fit in a single 70 mm micrograph at the lowest magnification (685x) available on our Zeiss EM9-S.

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Social representations of human rights violations: Further evidence

Swiss Journal of Psychology ◽

10.1024//1421-0185.60.2.89 ◽

2001 ◽

Vol 60 (2) ◽

pp. 89-98 ◽

Cited By ~ 10

Author(s):

Alain Clémence ◽

Thierry Devos ◽

Willem Doise

Keyword(s):

Cluster Analysis ◽

Human Rights ◽

Costa Rica ◽

Young People ◽

Social Representations ◽

Social Reality ◽

Questionnaire Study ◽

Human Rights Violations ◽

High Tolerance ◽

Individual Actions

Social representations of human rights violations were investigated in a questionnaire study conducted in five countries (Costa Rica, France, Italy, Romania, and Switzerland) (N = 1239 young people). We were able to show that respondents organize their understanding of human rights violations in similar ways across nations. At the same time, systematic variations characterized opinions about human rights violations, and the structure of these variations was similar across national contexts. Differences in definitions of human rights violations were identified by a cluster analysis. A broader definition was related to critical attitudes toward governmental and institutional abuses of power, whereas a more restricted definition was rooted in a fatalistic conception of social reality, approval of social regulations, and greater tolerance for institutional infringements of privacy. An atypical definition was anchored either in a strong rejection of social regulations or in a strong condemnation of immoral individual actions linked with a high tolerance for governmental interference. These findings support the idea that contrasting definitions of human rights coexist and that these definitions are underpinned by a set of beliefs regarding the relationships between individuals and institutions.

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High tolerance of progressive elastic compression in peripheral arterial disease

VASA ◽

10.1024/0301-1526/a000799 ◽

2019 ◽

Vol 48 (5) ◽

pp. 413-417 ◽

Cited By ~ 2

Author(s):

Serge Couzan ◽

Jean-François Pouget ◽

Claire Le Hello ◽

Céline Chapelle ◽

Silvy Laporte ◽

...

Keyword(s):

Venous Insufficiency ◽

Ankle Brachial Index ◽

Arterial Disease ◽

Return Flow ◽

High Tolerance ◽

Compression Stockings ◽

Short Term ◽

Poor Tolerance ◽

The Mean ◽

Peripheral Arterial

Summary. Background: Theoretically progressive compression stockings, which produce a higher compression at the calf than at the ankle level, improve venous return flow without exacerbating peripheral arterial insufficiency (PAD). We aimed to evaluate the short-term tolerance of elastic progressive compression stockings on peripheral arterial vascularisation in patients with symptomatic PAD and associated mild venous insufficiency. Patients and methods: Monocentric, prospective, open pilot study of 18 patients (acceptability study, 6 x 6 plan) evaluating the short-term tolerance of progressive compression stockings (18 ± 2 mmHg at calf and 8 ± 2 mmHg at ankle level) in patients with PAD (ankle brachial index ABI > 0.60 < 0.75) and chronic venous insufficiency (C1s–C4 stages of the CEAP classification). Day 15 tolerance was evaluated by a composite primary criteria comprising: no decrease > 15 % of ABI on each side, no decrease > 15 % of toe brachial index (TBI) on each side and no decrease > 25 % of the number of active plantar flexions performed while standing. Results: The proportion of men was 77.8 %, mean age was 77.3 ± 7.5 years and no patient were diabetic. At inclusion, the mean low ABI was 0.60 ± 0.04 and the mean high ABI was 0.77 ± 0.18. The mean low TBI was 0.32 ± 0.09 and the mean high TBI 0.46 ± 0.15. The mean number of active standing plantar flexions was 33.0 ± 5.0. The majority of the patients were classified in CEAP C2s and C3 classes (class 2: 16.7 %, class C2s: 27.8 %, class C3: 44.4 %, class C4: 5.6 % and class C4s: 5.6 %). Poor tolerance occurred in no patient. By day 30, no patient had worsening of their arterial and venous symptoms. No adverse events occurred during the study. Conclusions: These results suggest a high tolerance of progressive elastic stockings (18 ± 2 mmHg at calf and 8 ± 2 mmHg at ankle level) in symptomatic PAD.

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