A photoluminescent nanocrystal-based signaling protocol highly sensitive to nerve agents and highly toxic organophosphate pesticides.
نویسندگان
چکیده
A photoluminescent II-VI group semiconductor nanocrystal (NC)-based signaling platform composed of thioglycolic acid capped CdS NCs and acetylcholinesterase-acetylthiocholine enzyme catalytic reaction system was developed that was shown to be highly sensitive to nerve agents and toxic organophosphate pesticides with detection limits down to sub-nM levels. This new sensing protocol does not require troublesome conjugation of biomacromolecules onto the surface of NCs.
منابع مشابه
Highly sensitive and selective amperometric microbial biosensor for direct determination of p-nitrophenyl-substituted organophosphate nerve agents.
We report herein a whole cell-based amperometric biosensor for highly selective, highly sensitive, direct, single-step, rapid, and cost-effective determination of organophosphate pesticides with a p-nitrophenyl substituent. The biosensor was comprised of a p-nitrophenol degrader, Pseudomonas putida JS444, genetically engineered to express organophosphorus hydrolase (OPH) on the cell surface imm...
متن کاملمسمومیت با عوامل شیمیایی جنگی اعصاب
Introduction: Organophosphorous (OP) chemical warfare nerve agents are similar to OP pesticides in their structure and toxic mechanisms.. These agents mainly sarin and tabun were used during Iran-Iraq war with high mortalities. Sarin was also used as chemical terrorism in Matsomoto and Tokyo metro in 1994 and 1995, respectively with high morbidity and mortality. Since these lethal agents are st...
متن کاملFe3O4 magnetic nanoparticle peroxidase mimetic-based colorimetric assay for the rapid detection of organophosphorus pesticide and nerve agent.
Rapid and sensitive detection methods are in urgent demand for the screening of extensively used organophosphorus pesticides and highly toxic nerve agents for their neurotoxicity. In this study, we developed a novel Fe(3)O(4) magnetic nanoparticle (MNP) peroxidase mimetic-based colorimetric method for the rapid detection of organophosphorus pesticides and nerve agents. The detection assay is co...
متن کاملNew method for retrospective detection of exposure to organophosphorus anticholinesterases: application to alleged sarin victims of Japanese terrorists.
With regard to detection of exposure to anticholinesterase, the presently used methods have the disadvantage that they cannot detect either low-level exposures with certainty or the structure of the agent and the extent of poisoning. In principle, organophosphate-inhibited butyrylcholinesterase in human plasma is the most persistent and abundant source for biomonitoring of exposure to organopho...
متن کاملAssessing protection against OP pesticides and nerve agents provided by wild-type HuPON1 purified from Trichoplusia ni larvae or induced via adenoviral infection.
Human paraoxonase-1 (HuPON1) has been proposed as a catalytic bioscavenger of organophosphorus (OP) pesticides and nerve agents. We assessed the potential of this enzyme to protect against OP poisoning using two different paradigms. First, recombinant HuPON1 purified from cabbage loopers (iPON1; Trichoplusia ni) was administered to guinea pigs, followed by exposure to at least 2 times the media...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
عنوان ژورنال:
- The Analyst
دوره 134 10 شماره
صفحات -
تاریخ انتشار 2009