toxicity of various silver nanoparticles compared to silver ions in the ponto-caspian amphipod pontogammarus maeoticus (sowinsky, 1894)

نویسندگان
چکیده

according to the increased probability of the presence of nanomaterials in the aquatic ecosystems, the present study examined the toxicity of three engineered silver nanoparticles (agnps) as well as silver ions in the pontogammarus maeoticus, a brackish water benthic organism living in the littoral zone of the caspian sea. the animals were acutely exposed to different concentrations of two commercially prepared colloidal forms and a freshly prepared suspension of silver nanoparticles, plus agno3 during 48 hr. the number of mortalities was assessed and lethal concentration values ​​were calculated using the epa probit analysis program. according to median lethal concentrations (lc50), the order of sensitivity of this amphipod to tested silver compounds was as: previously prepared agnps colloids > freshly prepared agnps suspension > agno3. also the signs of nanoparticle accumulation were evident between the pereopods and pleopods of this gammarid; this accumulation could be one of the reasons for the higher toxicity of silver nanoparticles in comparison with silver ions in p. maeoticus. more acute and chronic studies are needed to understand the various aspects of nano-silver toxicity on amphipods in different salinities.

برای دانلود باید عضویت طلایی داشته باشید

برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

منابع مشابه

Toxicity of various silver nanoparticles compared to silver ions in the Ponto-Caspian amphipod Pontogammarus maeoticus (Sowinsky, 1894)

According to the increased probability of the presence of nanomaterials in the aquatic ecosystems, the present study examined the toxicity of three engineered silver nanoparticles (AgNPs) as well as silver ions in the Pontogammarus maeoticus, a brackish water benthic organism living in the littoral zone of the Caspian Sea. The animals were acutely exposed to different concentrations of two comm...

متن کامل

Toxicity of various silver nanoparticles compared to silver ions in Daphnia magna

BACKGROUND To better understand the potential ecotoxicological impacts of silver nanoparticles released into freshwater environments, the Daphnia magna 48-hour immobilization test was used. METHODS The toxicities of silver nitrate, two types of colloidal silver nanoparticles, and a suspension of silver nanoparticles were assessed and compared using standard OECD guidelines. Also, the swimming...

متن کامل

Comparative study of lethal concentration 50 (LC50) of silver nanoparticles and silver nitrate in Caspian Sea gammarus (Pontogammarus maeoticus)

Silver nanoparticles are widely used in various sciences and industries. Widespread use of silver nanoparticles has caused entrance of it to the aquatic environment through Wastewater, so it is necessary to investigate the effects of silver nanoparticles on various aquatic organisms. The present study investigated the lethal concentration and bioaccumulation of silver nanoparticles and its comp...

متن کامل

Comparative study of lethal concentration 50 (LC50) of silver nanoparticles and silver nitrate in Caspian Sea gammarus (Pontogammarus maeoticus)

Silver nanoparticles are widely used in various sciences and industries. Widespread use of silver nanoparticles has caused entrance of it to the aquatic environment through Wastewater, so it is necessary to investigate the effects of silver nanoparticles on various aquatic organisms. The present study investigated the lethal concentration and bioaccumulation of silver nanoparticles and its comp...

متن کامل

بیان پروتئین شوک حرارتی Hsp70 تحت استرس دمایی در پونتوگاماروس دریای خزر (Pontogammarus maeoticus, Sowinsky 1894)

چکیده پروتئین­های شوک حرارتی جزء خانواده بزرگی از پروتئین­های وابسته به تنش و قابل القاء با استرس می‌باشد و موجودات زنده را از نوسانات موقتی شرایط زیست­محیطی حفاظت می نمایند و سبب پایداری سایر پروتئین‌ها در موجود زنده می­گردند. پونتوگاماروس دریای خزر (Pontogammarus maeoticus) از فراوان­ترین آمفی پودهای سواحل جنوبی دریای خزر است. در این تحقیق، حضور پروتئین‌های شوک حرارتی در پونتوگاماروس دریای خ...

متن کامل

In Vivo Toxicity of Silver Nanoparticles and Silver Ions in Zebrafish (Danio rerio)

The influence of water chemistry on characterised polyvinyl pyrrolidone- (PVP-) coated silver nanoparticles (81 nm) was investigated. NaCl solution series of 100-800 mg L(-1) lead to initial and temporal increase in nanoparticles size, but agglomeration was limited. pH variation (5-8) had only minor influence on the hydrodynamic particle size. Acute toxicity of nanosivler to zebrafish (Danio re...

متن کامل

منابع من

با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید


عنوان ژورنال:
caspian journal of enviromental sciences

جلد ۱۴، شماره ۱، صفحات ۲۵-۳۲

میزبانی شده توسط پلتفرم ابری doprax.com

copyright © 2015-2023