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https://www.readbyqxmd.com/read/28081489/protective-effect-of-chitosan-on-photosynthesis-and-antioxidative-defense-system-in-edible-rape-brassica-rapa-l-in-the-presence-of-cadmium
#1
Haiying Zong, Song Liu, Ronge Xing, Xiaolin Chen, Pengcheng Li
Chitosan (CTS) induces plant tolerance against several abiotic stresses, including salinity and drought exposure. However, the role of CTS in cadmium (Cd)-induced stress amelioration is largely unknown. In the present study, a hydroponic pot experiment was conducted to study the roles of CTS with different molecular weight (Mw) (10kDa,5kDa and 1kDa) in alleviating Cd toxicity in edible rape (Brassica rapa L .). The results showed that Cd stress significantly decreased plant growth, leaf chlorophyll contents and increased the malondialdehyde (MDA) level in rape leaves...
January 9, 2017: Ecotoxicology and Environmental Safety
https://www.readbyqxmd.com/read/28081365/visualizing-arsenate-reactions-and-encapsulation-in-a-single-zero-valent-iron-nanoparticle
#2
Lan Ling, Wei-Xian Zhang
A nanostructure-based mechanism is presented on the enrichment, separation and immobilization of arsenic with nanoscale Zero-Valent Iron (nZVI). The As-Fe reactions are studied with Spherical Aberration Corrected Scanning Transmission Electron Microscopy (Cs-STEM). Near atomic-resolution (<1 nm3) electron tomography discovers a thin continuous layer (23±3 Å) of elemental arsenic sandwiched between the iron oxide shell and the zero-valent iron core. This points to a unique mechanism of nano-encapsulation and proves that the outer layer, especially the Fe(0)/oxide interface is the edge of the As-Fe reactions...
January 12, 2017: Environmental Science & Technology
https://www.readbyqxmd.com/read/28078494/erratum-to-effect-of-taurine-supplementation-on-hepatic-metabolism-and-alleviation-of-cadmium-toxicity-and-bioaccumulation-in-a-marine-teleost-red-sea-bream-pagrus-major
#3
Takeshi Hano, Katsutoshi Ito, Kumiko Kono, Mana Ito, Nobuyuki Ohkubo, Kazuhiko Mochida
No abstract text is available yet for this article.
January 11, 2017: Fish Physiology and Biochemistry
https://www.readbyqxmd.com/read/28076652/estimation-of-benchmark-dose-of-lifetime-cadmium-intake-for-adverse-renal-effects-using-hybrid-approach-in-inhabitants-of-an-environmentally-exposed-river-basin-in-japan
#4
Keiko Kubo, Kazuhiro Nogawa, Teruhiko Kido, Muneko Nishijo, Hideaki Nakagawa, Yasushi Suwazono
The aim of this study is to estimate the reference level of lifetime cadmium intake (LCd) as the benchmark doses (BMDs) and their 95% lower confidence limits (BMDLs) for various renal effects by applying a hybrid approach. The participants comprised 3,013 (1,362 men and 1,651 women) and 278 (129 men and 149 women) inhabitants of the Cd-polluted and nonpolluted areas, respectively, in the environmentally exposed Kakehashi River basin. Glucose, protein, aminonitrogen, metallothionein, and β2 -microglobulin in urine were measured as indicators of renal dysfunction...
January 11, 2017: Risk Analysis: An Official Publication of the Society for Risk Analysis
https://www.readbyqxmd.com/read/28075368/critical-windows-of-prenatal-exposure-to-cadmium-and-size-at-birth
#5
Lu Cheng, Bin Zhang, Tongzhang Zheng, Jie Hu, Aifen Zhou, Bryan A Bassig, Wei Xia, David A Savitz, Stephen Buka, Chao Xiong, Joseph M Braun, Yaqi Zhang, Yanqiu Zhou, Xinyun Pan, Chuansha Wu, Youjie Wang, Zhengmin Qian, Aimin Yang, Megan E Romano, Kunchong Shi, Shunqing Xu, Yuanyuan Li
Prenatal cadmium (Cd) exposure has been associated with adverse birth outcomes, but the findings of previous studies are inconsistent. We measured Cd concentrations in urine samples at or near 13, 24, and 35 gestational weeks from 282 women in Wuhan, China. We used generalized estimating equation models to assess the associations between maternal creatinine adjusted urinary Cd concentrations at each trimester and birth size. A significant inverse association was observed between higher maternal Cd levels measured during the 1st trimester and birth size in girls...
January 9, 2017: International Journal of Environmental Research and Public Health
https://www.readbyqxmd.com/read/28075044/population-impacts-in-white-sucker-catostomus-commersonii-exposed-to-oil-sands-derived-contaminants-in-the-athabasca-river
#6
Collin J Arens, Jennifer C Arens, Natacha S Hogan, Richard J Kavanagh, Fabrice Berrue, Glen J Van Der Kraak, Michael R van den Heuvel
Biological and chemical endpoints were measured in White Sucker collected downstream of Athabasca oil sands developments and compared with those at Calling Lake, a reference location upstream of the Athabasca oil sands deposit. Naphthenic acid concentrations were also measured at 14 sites in the Athabasca River watershed. Concentrations of naphthenic acids were elevated in tributaries adjacent to oil sands mining developments. Tributary naphthenic acid profiles were more similar to aged oil sands process water than samples from the Athabasca River, suggesting an influence of tailings in the tributaries...
January 11, 2017: Environmental Toxicology and Chemistry
https://www.readbyqxmd.com/read/28074912/influences-of-calcium-silicate-on-chemical-forms-and-subcellular-distribution-of-cadmium-in-amaranthus-hypochondriacus-l
#7
Huanping Lu, Zhian Li, Jingtao Wu, Yong Shen, Yingwen Li, Bi Zou, Yetao Tang, Ping Zhuang
A pot experiment was conducted to investigate the effects of calcium silicate (CS) on the subcellular distribution and chemical forms of cadmium (Cd) in grain amaranths (Amaranthus hypochondriacus L. Cv. 'K112') grown in a Cd contaminated soil. Results showed that the dry weight and the photosynthetic pigments contents in grain amaranths increased significantly with the increasing doses of CS treatments, with the highest value found for the treatment of CS3 (1.65 g/kg). Compared with the control, application of CS4 (3...
January 11, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28074369/mitigating-cadmium-accumulation-in-greenhouse-lettuce-production-using-biochar
#8
Ruilun Zheng, Guoxin Sun, Cui Li, Brian J Reid, Zubin Xie, Bo Zhang, Qinghai Wang
Greenhouse experiments were conducted to investigate the influence of rice straw biochar (RSB) on soil cadmium (Cd) availability and accumulation in lettuce. The RSB was applied either in bands or broadcast in the test site of four greenhouses with soil Cd concentrations ranging from 1.70-3.14 μg g(-1). Biochar doses applied in bands were half of those broadcast. The Cd levels in the shoots of lettuce were observed to be reduced by up to 57% with increasing RSB application rate (0, 6, 12, 18 t ha(-1))...
January 10, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/28074227/heavy-metals-in-liver-and-brain-of-waterfowl-from-the-evros-delta-greece
#9
Maria Aloupi, Asimina Karagianni, Savas Kazantzidis, Triantaphyllos Akriotis
The concentrations of six heavy metals (cadmium [Cd], chromium [Cr], copper [Cu], manganese [Mn], lead [Pb], and zinc [Zn]) were determined in liver and brain of nine species of waterfowl from the Evros Delta, one of the most important wetlands in Greece, to assess metal contamination and potential risk to waterfowl. Significant differences among species were found for hepatic Cr, Cu, Pb, and Zn; the highest levels of all metals were found in liver of mute swans. Cd increased significantly with age in both organs of wigeon; some differences were also observed between males and females of the same species...
January 10, 2017: Archives of Environmental Contamination and Toxicology
https://www.readbyqxmd.com/read/28073984/transcription-factors-pverf15-and-pvmtf-1-form-a-cadmium-stress-transcriptional-pathway
#10
Tingting Lin, Wanning Yang, Wen Lu, Ying Wang, Xiaoting Qi
In plants, cadmium (Cd)-responsive transcription factors are key downstream effectors of Cd stress transcriptional pathways, which are capable of converging Cd stress signals through triggering the expression of Cd-detoxification genes. However, the upstream transcriptional regulatory pathways that modulate their responses to Cd are less clear. Previously, we identified a bean (Phaseolus vulgaris) metal response element-binding transcription factor1 (PvMTF-1) that responds to Cd and confers Cd tolerance in planta...
January 10, 2017: Plant Physiology
https://www.readbyqxmd.com/read/28072849/analysis-of-the-importance-of-oxides-and-clays-in-cd-cr-cu-ni-pb-and-zn-adsorption-and-retention-with-regression-trees
#11
Juan José González-Costa, Manuel Joaquín Reigosa, José María Matías, Emma Fernández-Covelo
This study determines the influence of the different soil components and of the cation-exchange capacity on the adsorption and retention of different heavy metals: cadmium, chromium, copper, nickel, lead and zinc. In order to do so, regression models were created through decision trees and the importance of soil components was assessed. Used variables were: humified organic matter, specific cation-exchange capacity, percentages of sand and silt, proportions of Mn, Fe and Al oxides and hematite, and the proportion of quartz, plagioclase and mica, and the proportions of the different clays: kaolinite, vermiculite, gibbsite and chlorite...
2017: PloS One
https://www.readbyqxmd.com/read/28071525/additive-toxic-effect-of-deltamethrin-and-cadmium-on-hepatic-hematological-and-immunological-parameters-in-mice
#12
Hasibur Rehman, Al Thbiani Aziz, Shalini Saggu, Adam L VanWert, Nahla Zidan, Sundeep Saggu
Exposure to natural and man-made environmental toxins concurrently can pose a greater threat to multiple organs. In the present work, we investigated interactions between deltamethrin (DM) and cadmium (Cd), whose mechanisms of action in humans are poorly understood. Albino mice were randomly divided into four groups, each containing six mice: saline as control, DM-treated, cadmium chloride (CdCl2)-treated, and CdCl2 plus DM treated. After 2 weeks of treatment biochemical and hematological effects, total leukocyte count (TLC), differential leukocyte count, humoral-mediated immune responses, and histopathological studies were conducted...
January 1, 2017: Toxicology and Industrial Health
https://www.readbyqxmd.com/read/28070927/lead-sulfide-selenide-quantum-dots-and-gold-copper-alloy-nanoparticles-augment-light-harvesting-of-solar-cells
#13
Aparajita Das, Melepurath Deepa, Partha Ghosal
Lead-sulfide-selenide (PbSSe) quantum dots (QDs) and gold-copper (AuCu) alloy nanoparticles (NPs) are incorporated in a cadmium sulfide (CdS)/titanium oxide (TiO2) photoanode for the first time for enhanced conversion of solar energy to electricity. PbSSe QDs with a band gap of 1.02 eV, extend the light harvesting range of the photoanode from visible to the near infrared region. The conduction band (CB) edge of PbSSe QDs is wedged between the CBs of TiO2 and CdS; this additional level coupled with a good electrical conductivity of the dots facilitate charge transport and collection, for a high power conversion efficiency (PCE) of 4...
January 10, 2017: Chemphyschem: a European Journal of Chemical Physics and Physical Chemistry
https://www.readbyqxmd.com/read/28070864/factors-that-affect-the-content-of-cadmium-nickel-copper-and-zinc-in-tissues-of-the-knee-joint
#14
Wojciech Roczniak, Barbara Brodziak-Dopierała, Elżbieta Cipora, Agata Jakóbik-Kolon, Joanna Kluczka, Magdalena Babuśka-Roczniak
Osteoarthritis causes the degradation of the articular cartilage and periarticular bones. Trace elements influence the growth, development and condition of the bone tissue. Changes to the mineral composition of the bone tissue can cause degenerative changes and fractures. The aim of the research was to determine the content of cadmium (Cd), nickel (Ni), copper (Cu) and zinc (Zn) in the tibia, the femur and the meniscus in men and women who underwent a knee replacement surgery. Samples were collected from 50 patients, including 36 women and 14 men...
January 9, 2017: Biological Trace Element Research
https://www.readbyqxmd.com/read/28070103/a-pilot-study-for-construction-of-a-new-cadmium-sensing-yeast-strain-carrying-a-reporter-plasmid-with-the-jlp1-promoter
#15
Sayoko Ito-Harashima, Yui Mizutani, Motoshi Nishimura, Hyo Jeong Kim, Yeo Jin Kim, Hyun Soo Kim, Ji Hye Bae, Preeyaporn Koedrith, Masanobu Kawanishi, Young Rok Seo, Takashi Yagi
Cadmium contamination still occurs in some parts of the world, and its concentrations in the environment are monitored in most countries due to its adverse effects on human health. We herein established yeast (Saccharomyces cerevisiae) reporter assay strains carrying plasmids with the yeast JLP1, SEO1, and CUP1 promoters connected to the bacterial lacZ reporter gene. The strain carrying the high-copy number pESC-JLP1-lacZ reporter plasmid was more responsive to cadmium than strains with other reporter plasmids...
2017: Journal of Toxicological Sciences
https://www.readbyqxmd.com/read/28068760/a-laboratory-scale-microbial-food-chain-to-study-bioaccumulation-biomagnification-and-ecotoxicity-of-cadmium-telluride-quantum-dots
#16
Govind Sharan Gupta, Ashutosh Kumar, Violet Aileen Senapati, Alok Kumar Pandey, Rishi Shanker, Alok Dhawan
The increasing applications of engineered nanomaterials (ENMs) in consumer products warrant a careful evaluation of their trophic transfer and consequent ecological impact. In the present study, a laboratory scale aquatic microbial food chain was established using bacteria (Escherichia coli) as a prey and ciliated protozoan (Paramecium caudatum) as a predator organism to determine the impact of cadmium telluride quantum dots (CdTe QDs). We observed that 29% of bacterivory potential of Paramecium was lost, including a ~12 h of delay in doubling time on exposure to 25 mg/L of CdTe QD (~4 nm) as compared to control...
January 9, 2017: Environmental Science & Technology
https://www.readbyqxmd.com/read/28064415/alleviation-mechanisms-of-selenium-on-cadmium-spiked-neutrophil-injury-to-chicken
#17
Siran Tan, Qianru Chi, Tianqi Liu, Zhepeng Sun, Yahong Min, Ziwei Zhang, Shu Li
To determine the negative effects of cadmium (Cd) exposure and the protective role of selenium (Se) on Cd-spiked neutrophils of chicken, forty-eight 28-day-old Isa Brown male chickens were divided randomly into four groups. Group I (control group) was fed with the basic diet containing 0.2 mg/kg Se. Group II (Se-treated group) was fed with the basic diet supplemented with Na2SeO3, and the total Se content was 2 mg/kg. Group III (Se/Cd-treated group) was fed with the basic diet supplemented with Na2SeO3; the total Se content was 2 mg/kg and supplemented with 150 mg/kg CdCl2...
January 7, 2017: Biological Trace Element Research
https://www.readbyqxmd.com/read/28063893/a-plasmid-encoded-dsba-homologue-is-a-growth-phase-regulated-thioredoxin
#18
Amada Díaz-Magaña, Martha P Chávez-Moctezuma, Jesús Campos-García, Martha I Ramírez-Díaz, Carlos Cervantes
The Pseudomonas aeruginosa plasmid pUM505 contains in a pathogenicity island the dsbA2 gene, which encodes a product with similarity to DsbA protein disulfide isomerases, enzymes that catalyze formation and isomerization of disulfide bonds in protein cysteine residues. Using transcriptional fusions, it was found that dsbA2 gene promoter is activated during the stationary phase, suggesting that DsbA2 protein may be required for adaptive changes that occur during this stage of bacterial growth. Transfer of the pUM505 dsbA2 gene to a cadmium-sensitive P...
January 4, 2017: Plasmid
https://www.readbyqxmd.com/read/28063819/toxicological-interactions-of-silver-nanoparticles-and-non-essential-metals-in-human-hepatocarcinoma-cell-line
#19
Renata Rank Miranda, Arandi Ginane Bezerra, Ciro Alberto Oliveira Ribeiro, Marco Antônio Ferreira Randi, Carmen Lúcia Voigt, Lilian Skytte, Kaare Lund Rasmussen, Frank Kjeldsen, Francisco Filipak Neto
Toxicological interaction represents a challenge to toxicology, particularly for novel contaminants. There are no data whether silver nanoparticles (AgNPs), present in a wide variety of products, can interact and modulate the toxicity of ubiquitous contaminants, such as nonessential metals. In the current study, we investigated the toxicological interactions of AgNP (size=1-2nm; zeta potential=-23mV), cadmium and mercury in human hepatoma HepG2 cells. The results indicated that the co-exposures led to toxicological interactions, with AgNP+Cd being more toxic than AgNP+Hg...
January 4, 2017: Toxicology in Vitro: An International Journal Published in Association with BIBRA
https://www.readbyqxmd.com/read/28063409/tinospora-cordifolia-extract-attenuates-cadmium-induced-biochemical-and-histological-alterations-in-the-heart-of-male-wistar-rats
#20
Lohanathan Bharathi Priya, Rathinasamy Baskaran, Pitchai Elangovan, Velumani Dhivya, Chih-Yang Huang, Viswanadha Vijaya Padma
Persistence of cadmium (Cd) in the environment causes serious ecological problems. Tinospora cordifolia is a medicinal herb used in Ayurveda for treating various metabolic disorders and toxic conditions. The present study investigates the protective effect of T. cordifolia stem methanolic extract (TCME) on a heavy metal, Cd-induced cardiotoxicity in male Wistar rats. Male albino Wistar rats were divided into four groups (n=6). The animals after treatment for 28days with Cd and TCME were analysed for biochemical and histological changes in the serum and heart tissues...
January 4, 2017: Biomedicine & Pharmacotherapy, Biomédecine & Pharmacothérapie
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