نتایج جستجو برای: toxic level

تعداد نتایج: 1149508  

Journal: :International Journal of Current Microbiology and Applied Sciences 2018

Journal: :Annual review of entomology 2015
Reed M Johnson

Insecticides are chemicals used to kill insects, so it is unsurprising that many insecticides have the potential to harm honey bees (Apis mellifera). However, bees are exposed to a great variety of other potentially toxic chemicals, including flavonoids and alkaloids that are produced by plants; mycotoxins produced by fungi; antimicrobials and acaricides that are introduced by beekeepers; and f...

Journal: :Mathematical biosciences and engineering : MBE 2013
Zhilan Feng Wenzhang Huang Donald L DeAngelis

Spatially homogeneous (ODE) and reaction-diffusion models for plant-herbivore interactions with toxin-determined functional response are analyzed. The models include two plant species that have different levels of toxicity. The plant species with a higher level of toxicity is assumed to be less preferred by the herbivore and to have a relatively lower intrinsic growth rate than the less toxic p...

2009
Nikhil Agarwal Chanont Banternghansa Linda T.M. Bui

We examine the effect of toxic exposure on U.S. infant and fetal mortality rates between 1989 and 2002 from toxic pollution released by facilities reporting to the Toxic Release Inventory (TRI). Unlike previous studies, we control for toxic pollution from mobile sources and from non-TRI reporting facilities. We find significant adverse effects of TRI exposure on infant mortality. There is evide...

Journal: :The Journal of antimicrobial chemotherapy 1996
M Viluksela P J Vainio R K Tuominen

Cytotoxicity of erythromycin base, erythromycin estolate, erythromycin-11,12-cyclic carbonate, roxithromycin, clarithromycin and azithromycin was compared in cultured human non-malignant Chang liver cells using reduction of 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyl tetrazolium bromide and cellular protein concentration as end points of toxicity. Erythromycin estolate was the most toxic macrolid...

Journal: :Bioinformatics 2010
Jungsoo Gim Ho-Shik Kim Junil Kim Minsoo Choi Jeong-Rae Kim Yeun-Jun Chung Kwang-Hyun Cho

MOTIVATION Viewing a cellular system as a collection of interacting parts can lead to new insights into the complex cellular behavior. In this study, we have investigated aryl hydrocarbon receptor (AhR) signal transduction pathway from such a system-level perspective. AhR detects various xenobiotics, such as drugs or endocrine disruptors (e.g. dioxin), and mediates transcriptional regulation of...

Journal: :The Ceylon medical journal 2009
W K B Kasun Fernando P L Ariyananda

In many countries, paracetamol ranks at the top of all known poisoning agents implicated in accidental or intentional poisoning [1]. In general, liver injury caused by drugs is known to be either type A “dose dependent” (intrinsic toxicity) or type B idiosyncratic. Perhaps with the exception of single high dose of drug induced liver injury, most drug induced liver injury (DILI) cases evaluated ...

Journal: :Environmental Health Perspectives 1987
B A Fowler

The intracellular compartmentation of essential and toxic metals is of intense scientific interest because of its potential for adding to our understanding of both normal homeostatic mechanisms for metals and of the mechanisms which underlie metal-induced cell injury. High-affinity metal-binding proteins, lysosomes, and precipitates such as inclusion bodies or concretions, play major roles in t...

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