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https://www.readbyqxmd.com/read/28738572/sequential-determination-of-nickel-and-cadmium-in-tobacco-molasses-and-refill-solutions-for-e-cigarettes-samples-by-molecular-fluorescence
#1
María Carolina Talio, Magdalena Alesso, Mariano Acosta, Verónica S Wills, Liliana P Fernández
In this work, a new procedure was developed for separation and preconcentration of nickel(II) and cadmium(II) in several and varied tobacco samples. Tobacco samples were selected considering the main products consumed by segments of the population, in particular the age (youth) and lifestyle of the consumer. To guarantee representative samples, a randomized strategy of sampling was used. In the first step, a chemofiltration on nylon membrane is carried out employing eosin (Eo) and carbon nanotubes dispersed in sodium dodecylsulfate (SDS) solution (phosphate buffer pH 7)...
November 1, 2017: Talanta
https://www.readbyqxmd.com/read/28738286/emodin-suppresses-cadmium-induced-osteoporosis-by-inhibiting-osteoclast-formation
#2
Xiao Chen, Shuai Ren, Guoying Zhu, Zhongqiu Wang, Xiaolin Wen
Environmental level of cadmium (Cd) exposure can induce bone loss. Emodin, a naturally compound found in Asian herbal medicines, could influence osteoblast/osteoclast differentiation. However, the effects of emodin on Cd-induced bone damage are not clarified. The aim of this study was to investigate the role of emodin on Cd-induced osteoporosis. Sprague-Dawley male rats were divided into three groups which were given 0mg/L, 50mg Cd/L and 50mg Cd/L plus emodin (50mg/kg body weight). Bone histological investigation, microCT analysis, metabolic biomarker determination and immunohistochemical staining were performed at the 12th week...
July 18, 2017: Environmental Toxicology and Pharmacology
https://www.readbyqxmd.com/read/28738198/stability-of-cognitive-development-during-the-first-five-years-of-life-in-relation-to-heavy-metal-concentrations-in-umbilical-cord-blood-mothers-and-children-s-environmental-health-moceh-birth-cohort-study
#3
Hyungmin Lee, Hyewon Park, Eunhee Ha, Yun-Chul Hong, Mina Ha, Hyesook Park, Bung-Nyun Kim, Soo-Jeong Lee, Kyung Yeon Lee, Ja Hyeong Kim, Kyoung Sook Jeong, Yangho Kim
The objective of this study was to investigate stability of cognitive development during the first five years of life in relation to heavy metal concentrations in umbilical cord blood in Korean children. This research is part of the Mothers' and Children's Environmental Health (MOCEH) study, a multi-center prospective birth cohort study of pregnant women in Korea who were recruited from 2006 to 2010. We analyzed the complete follow-up data of children who were 5years-old in 2016. We measured lead, mercury, and cadmium levels in the umbilical cord blood of 251 children, and analyzed them, for whom neurodevelopmental data were available...
July 20, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28737682/cadmium-handling-toxicity-and-molecular-targets-involved-during-pregnancy-lessons-from-experimental-models
#4
REVIEW
Tania Jacobo-Estrada, Mitzi Santoyo-Sánchez, Frank Thévenod, Olivier Barbier
Even decades after the discovery of Cadmium (Cd) toxicity, research on this heavy metal is still a hot topic in scientific literature: as we wrote this review, more than 1440 scientific articles had been published and listed by the PubMed.gov website during 2017. Cadmium is one of the most common and harmful heavy metals present in our environment. Since pregnancy is a very particular physiological condition that could impact and modify essential pathways involved in the handling of Cd, the prenatal life is a critical stage for exposure to this non-essential element...
July 22, 2017: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/28735537/a-versatile-tetrablock-copolymer-scaffold-for-hierarchical-colloidal-nanoparticle-assemblies-synthesis-characterization-and-molecular-dynamics-simulations
#5
Gema Marcelo, Fraser P Burns, Tânia Ribeiro, José M Gaspar Martinho, M Pilar Tarazona, Enrique Saiz, Matthew G Moffitt, Jose Paulo Sequeira Farinha
A unique combination of molecular dynamics simulations and detailed multi-angle light scattering size exclusion chromatography (SEC-MALS) analysis is used to provide important a priori insights into the solution self-assembly of a well-defined and symmetric tetrablock copolymer with two acrylic acid outer blocks, two polystyrene inner blocks and a trithiocarbonate (TTC) central group, prepared by reversible addition-fragmentation chain transfer (RAFT) polymerization. SEC-MALS experiments show that the copolymer forms aggregates in both tetrahydrofuran (THF) and N-dimethylformamide (DMF), even in the presence of different salts, but not in 1,4-dioxane (dioxane)...
July 22, 2017: Langmuir: the ACS Journal of Surfaces and Colloids
https://www.readbyqxmd.com/read/28735157/effects-of-adhesions-of-amorphous-fe-and-al-hydroxides-on-surface-charge-and-adsorption-of-k-and-cd-2-on-rice-roots
#6
Zhao-Dong Liu, Hai-Cui Wang, Qin Zhou, Ren-Kou Xu
Iron (Fe) and aluminum (Al) hydroxides in variable charge soils attached to rice roots may affect surface-charge properties and subsequently the adsorption and uptake of nutrients and toxic metals by the roots. Adhesion of amorphous Fe and Al hydroxides onto rice roots and their effects on zeta potential of roots and adsorption of potassium (K(+)) and cadmium (Cd(2+)) by roots were investigated. Rice roots adsorbed more Al hydroxide than Fe hydroxide because of the greater positive charge on Al hydroxide. Adhesion of Fe and Al hydroxides decreased the negative charge on rice roots, and a greater effect of the Al hydroxide...
July 20, 2017: Ecotoxicology and Environmental Safety
https://www.readbyqxmd.com/read/28734265/decreased-lung-function-with-mediation-of-blood-parameters-linked-to-e-waste-lead-and-cadmium-exposure-in-preschool-children
#7
Xiang Zeng, Xijin Xu, H Marike Boezen, Judith M Vonk, Weidong Wu, Xia Huo
Blood lead (Pb) and cadmium (Cd) levels have been associated with lower lung function in adults and smokers, but whether this also holds for children from electronic waste (e-waste) recycling areas is still unknown. To investigate the contribution of blood heavy metals and lung function levels, and the relationship among living area, the blood parameter levels, and the lung function levels, a total of 206 preschool children from Guiyu (exposed area), and Haojiang and Xiashan (reference areas) were recruited and required to undergo blood tests and lung function tests during the study period...
July 19, 2017: Environmental Pollution
https://www.readbyqxmd.com/read/28734223/differential-effects-of-citric-acid-on-cadmium-uptake-and-accumulation-between-tall-fescue-and-kentucky-bluegrass
#8
ShuTing Wang, Qin Dong, ZhaoLong Wang
Organic acids play an important role in cadmium availability, uptake, translocation, and detoxification. A sand culture experiment was designed to investigate the effects of citric acid on Cd uptake, translocation, and accumulation in tall fescue and Kentucky bluegrass. The results showed that two grass species presented different Cd chemical forms, organic acid components and amount in roots. The dormant Cd accumulated in roots of tall fescue was the pectate- and protein- integrated form, which contributed by 84...
July 19, 2017: Ecotoxicology and Environmental Safety
https://www.readbyqxmd.com/read/28734219/acute-toxicity-of-cadmium-in-anisops-sardeus-heteroptera-notonectidae-effects-on-adult-and-nymphal-survival-and-swimming-behavior
#9
Chongtham Memtombi Chanu, Susmita Gupta, Abhik Gupta
Adult female and male, and final instar nymph of Anisops sardeus (Heteroptera: Notonectidae) were exposed to graded concentrations of cadmium in 96h static-with-renewal acute toxicity tests, which were conducted in dry (March) and wet (May-June) seasons. The 96h LC50 values for instar V nymph, adult female and male were found to be 0.9, 0.59 and 0.51mgL(-1) Cd, respectively, in wet season, while these were 26.7 and 20.2mgL(-1) Cd for adult female and male, respectively, in dry season. Adult males were most sensitive to Cd, followed by females in both seasons, while highest tolerance in wet season was observed in instar V nymph...
July 19, 2017: Ecotoxicology and Environmental Safety
https://www.readbyqxmd.com/read/28734213/enhanced-cadmium-phytoremediation-of-glycine-max-l-through-bioaugmentation-of-cadmium-resistant-bacteria-assisted-by-biostimulation
#10
Pongsarun Rojjanateeranaj, Chirawee Sangthong, Benjaphorn Prapagdee
This study examined the potential of three strains of cadmium-resistant bacteria, including Micrococcus sp., Pseudomonas sp. and Arthrobacter sp., to promote root elongation of Glycine max L. seedlings, soil cadmium solubility and cadmium phytoremediation in G. max L. planted in soil highly polluted with cadmium with and without nutrient biostimulation. Micrococcus sp. promoted root length in G. max L. seedlings under toxic cadmium conditions. Soil inoculation with Arthrobacter sp. increased the bioavailable fraction of soil cadmium, particularly in soil amended with a C:N ratio of 20:1...
July 17, 2017: Chemosphere
https://www.readbyqxmd.com/read/28732994/sonocatalytic-degradation-of-methylene-blue-by-a-novel-graphene-quantum-dots-anchored-cdse-nanocatalyst
#11
Saeed Sajjadi, Alireza Khataee, Mehdi Kamali
Cadmium selenide/graphene quantum dots (CdSe/GQDs) nanocatalyst with small band gap energy and a large specific surface area was produced via a facile three-step sonochemical-hydrothermal process. The features of the as-prepared CdSe, GQDs and CdSe/GQDs samples were characterized by photoluminescence spectroscopy (PL), scanning electron microscopy (SEM), energy dispersive X-ray (EDX), X-ray diffraction (XRD), Fourier transformed infrared (FT-IR), diffuse-reflectance spectrophotometer (DRS), and Brunauer-Emmett-Teller (BET) analysis...
November 2017: Ultrasonics Sonochemistry
https://www.readbyqxmd.com/read/28732951/application-of-ultrasonically-modified-cloud-point-extraction-method-for-simultaneous-enrichment-of-cadmium-and-lead-in-sera-of-different-types-of-gallstone-patients
#12
Mustafa Khan, Tasneem Gul Kazi, Hasan Imran Afridi, Muhammad Bilal, Asma Akhtar, Naeem Ullah, Sabir Khan, Sehrish Talpur
A novel and greener ultrasonically assisted/modified cloud point extraction procedure for the simultaneous preconcentration of lead and cadmium in serum samples of different types of gallstone patients was developed. The chelates of the under study metals, formerly formed with 8-hydroxyquinoline, were extracted in the micelles of a nonionic surfactant prior to analysis by flame atomic absorption spectrometer (FAAS). After the arrival of the cloud point, the critical micellar mass produced was homogenously dispersed in the aqueous phase with the help of ultrasound energy...
November 2017: Ultrasonics Sonochemistry
https://www.readbyqxmd.com/read/28732297/influence-of-environmental-conditions-on-the-toxicokinetics-of-cadmium-in-the-marine-copepod-acartia-tonsa
#13
Maria D Pavlaki, Rui G Morgado, Cornelis A M van Gestel, Ricardo Calado, Amadeu M V M Soares, Susana Loureiro
mMarine and estuarine ecosystems are highly productive areas that often act as a final sink for several pollutants, such as cadmium. Environmental conditions in these habitats can affect metal speciation, as well as its uptake and depuration by living organisms. The aim of this study was to assess cadmium uptake and depuration rates in the euryhaline calanoid copepod Acartia tonsa under different pH, salinity and temperature conditions. Cadmium speciation did not vary with changing pH or temperature, but varied with salinity...
July 18, 2017: Ecotoxicology and Environmental Safety
https://www.readbyqxmd.com/read/28732062/a-drosophila-model-for-toxicogenomics-genetic-variation-in-susceptibility-to-heavy-metal-exposure
#14
Shanshan Zhou, Sarah E Luoma, Genevieve E St Armour, Esha Thakkar, Trudy F C Mackay, Robert R H Anholt
The genetic factors that give rise to variation in susceptibility to environmental toxins remain largely unexplored. Studies on genetic variation in susceptibility to environmental toxins are challenging in human populations, due to the variety of clinical symptoms and difficulty in determining which symptoms causally result from toxic exposure; uncontrolled environments, often with exposure to multiple toxicants; and difficulty in relating phenotypic effect size to toxic dose, especially when symptoms become manifest with a substantial time lag...
July 21, 2017: PLoS Genetics
https://www.readbyqxmd.com/read/28731302/lead-ii-binding-in-metallothioneins
#15
Daisy L Wong, Maureen E Merrifield-MacRae, Martin J Stillman
Heavy metal exposure has long been associated with metallothionein (MT) regulation and its functions. MT is a ubiquitous, cysteine-rich protein that is involved in homeostatic metal response for the essential metals zinc and copper, as well as detoxification of heavy metals; the most commonly proposed being cadmium. MT binds in vivo to a number of metals in addition to zinc, cadmium and copper, such as bismuth. In vitro, metallation with a wide range of metals (especially mercury, arsenic, and lead) has been reported using a variety of analytical methods...
April 10, 2017: Metal Ions in Life Sciences
https://www.readbyqxmd.com/read/28731301/lead-ii-complexes-of-amino-acids-peptides-and-other-related-ligands-of-biological-interest
#16
Etelka Farkas, Péter Buglyó
Lead(II) forms (NH2,COO-)-chelated mono- and bis-complexes with simple amino acids, while mono-complexes with pH-dependent coordination modes exist with simple dipeptides. These mostly hemidirected complexes have moderate stability. While a weak interaction of side chain imidazole and carboxylate in lead(II)-aminoacidato complexes is found, the thiolate group has an exceptionally high affinity to this metal ion. For example, tridentate (NH2,COO-,S-)-coordination of penicillamine (Pen) and cysteine (Cys) results in an extremely strong interaction with lead(II), but, owing to the sterical effect of the 6s2 pair, a second ligand is not able to coordinate in the above mentioned tridentate way...
April 10, 2017: Metal Ions in Life Sciences
https://www.readbyqxmd.com/read/28730363/leaching-of-cu-cd-pb-and-phosphorus-and-their-availability-in-the-phosphate-amended-contaminated-soils-under-simulated-acid-rain
#17
Hongbiao Cui, Shiwen Zhang, Ruyan Li, Qitao Yi, Xuebo Zheng, Youbiao Hu, Jing Zhou
Phosphate amendments have been used to immobilize heavy metal-contaminated soils. However, phosphate amendments contain large amounts of phosphorus, which could leach out to potentially contaminate groundwater and surface water. A laboratory column leaching experiment was designed to study the effects of simulated acid rain (SAR) on the potential release of copper (Cu), lead (Pb), cadmium (Cd), and phosphorus (P), and their availability after immobilizing with hydroxyapatite (HAP) and potassium dihydrogen phosphate (PDP)...
July 20, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/28730330/effect-of-the-phosphogypsum-amendment-of-saline-and-agricultural-soils-on-growth-productivity-and-antioxidant-enzyme-activities-of-tomato-solanum-lycopersicum-l
#18
Mariem Smaoui-Jardak, Walid Kriaa, Mohamed Maalej, Mohamed Zouari, Lotfi Kamoun, Wassim Trabelsi, Ferjani Ben Abdallah, Nada Elloumi
The objective of this study was to investigate the effects of phosphogypsum (PG) amendment on the physiochemical proprieties of saline and agricultural soils along with the growth, productivity and antioxidant enzyme activities of tomato plants ( Solanum lycopersicum L.) grown on the amended soils under controlled conditions. Obtained results showed that the amendment of saline soil (H) by PG induced a decrease in pH as well as in electrical conductivity. However, for the non saline soil (MC), there was a decrease in pH associated with an increase in electrical conductivity...
July 20, 2017: Ecotoxicology
https://www.readbyqxmd.com/read/28728354/spatial-assessment-of-potential-ecological-risk-of-soil-heavy-metals-from-informal-e-waste-recycling-in-ghana
#19
Vincent Nartey Kyere, Klaus Greve, Sampson Atiemo, James Hawkins Ephraim
The rapidly increasing annual global volumes and the inherently valuable fractions of e-waste have created an avenue for individuals in Agbogbloshie, Accra, Ghana to make a living by utilizing unconventional, uncontrolled, primitive and crude procedures to recycle and recover valuable metals from these wastes. The current form of recycling procedures releases hazardous fractions such as heavy metals into the soils posing a significant risk to ecology and human health. 132 soil samples based on 100 m grid intervals were collected using handheld GPS and analyzed for Cadmium (Cd), chromium (Cr), copper (Cu), mercury (Hg), lead (Pb) and zinc (Zn) heavy metals...
July 10, 2017: Environmental Health and Toxicology
https://www.readbyqxmd.com/read/28728120/cadmium-and-high-temperature-effects-on-brain-and-behaviour-of-lymantria-dispar-l-caterpillars-originating-from-polluted-and-less-polluted-forests
#20
Vesna Perić-Mataruga, Branka Petković, Larisa Ilijin, Marija Mrdaković, Slađana Dronjak Čučaković, Dajana Todorović, Milena Vlahović
Insects brain as a part of nervous system is the first-line of fast stress response that integrate stress signals to regulate all aspects of insect physiology and behaviour. The cadmium (Cd) bioaccumulation factor (BF), activity of the neurotoxicity biomarker acetylcholinesterase (AChE), dopamine content, expression and amount of Hsp70 in the brain and locomotor activity were evaluated in the 4th instar of Lymantria dispar L. caterpillars fed a Cd supplemented diet and reared in an optimal temperature regime (23 °C) and/or exposed to high temperature (28 °C)...
July 11, 2017: Chemosphere
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