keyword
MENU ▼
Read by QxMD icon Read
search

chromium

keyword
https://www.readbyqxmd.com/read/28222184/ecological-and-human-health-risks-associated-with-abandoned-gold-mine-tailings-contaminated-soil
#1
Veronica Mpode Ngole-Jeme, Peter Fantke
Gold mining is a major source of metal and metalloid emissions into the environment. Studies were carried out in Krugersdorp, South Africa, to evaluate the ecological and human health risks associated with exposure to metals and metalloids in mine tailings contaminated soils. Concentrations of arsenic (As), cadmium (Cd), chromium (Cr), cobalt (Co), copper (Cu), lead (Pb), manganese (Mn), nickel (Ni), and zinc (Zn) in soil samples from the area varied with the highest contamination factors (expressed as ratio of metal or metalloid concentration in the tailings contaminated soil to that of the control site) observed for As (3...
2017: PloS One
https://www.readbyqxmd.com/read/28218537/siderophore-and-organic-acid-promoted-dissolution-and-transformation-of-cr-iii-fe-iii-oxy-hydroxides
#2
Emily M Saad, Jingying Sun, Shuo Chen, Olaf J Borkiewicz, Mengqiang Zhu, Owen W Duckworth, Yuanzhi Tang
The role of microbial activities on the transformation of chromium (Cr) remediation products has generally been overlooked. This study investigated the stability of Cr(III)-Fe(III)-(oxy)hydroxides, common Cr(VI) remediation products, with a range of compositions in the presence of common microbial exudates, siderophores and small organic acids. In the presence of a representative siderophore, desferrioxamine B (DFOB), iron (Fe) was released at higher rates and to greater extents relative to Cr from all solid phases...
February 20, 2017: Environmental Science & Technology
https://www.readbyqxmd.com/read/28218517/selective-metallization-induced-by-laser-activation-fabricating-metallized-patterns-on-polymer-via-metal-oxide-composite
#3
Jihai Zhang, Tao Zhou, Liang Wen
Recently, the metallization on polymer substrates has been paid more attention due to its outstanding properties of both plastics and metals. In this study, the metal oxide composite of copper-chromium oxide (CuO•Cr2O3) was incorporated into the polymer matrix to design a good laser direct structuring (LDS) material, and the well-defined copper pattern (thickness =10 μm) was successfully fabricated through selective metallization based on 1064 nm near-infrared (NIR) pulsed laser activation and electroless copper plating...
February 20, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28218450/chromium-iv-exposure-via-src-ras-signaling-promotes-cell-transformation
#4
Suthakar Ganapathy, Ping Li, Jean Lafontant, Rui Xiong, Tianqi Yu, Guojun Zhang, Changyan Chen
Hexavalent chromium [Cr(VI)] is a well-known environment carcinogen. The exposure of Cr(VI) through contaminated soil, air particles and drinking water is a strong concern for the public health worldwide. While many studies have been done, it remains unclear which intracellular molecules transduce Cr(VI)-mediated carcinogenic signaling in cells to promote cancer. In this study, we demonstrated that upon Cr(VI) treatment, the intracellular receptor src was activated, which further upregulated Ras activity, leading to the augmentation of ROS and onset of ER stress in human lung epithelial BEAS-2B or keratinocytes...
February 20, 2017: Molecular Carcinogenesis
https://www.readbyqxmd.com/read/28218371/adverse-reaction-to-metal-debris-in-a-consecutive-series-of-durom%C3%A2-hip-resurfacing-pseudotumour-incidence-and-metal-ion-concentration
#5
Albrecht Hartmann, Jan-Dirk Kieback, Jörg Lützner, Klaus-Peter Günther, Jens Goronzy
INTRODUCTION: The aim of this study was to evaluate the incidence of adverse reactions to metal debris (ARMD) in a consecutive series of DUROM™ Hip Resurfacing Arthroplasty (HRA) at mid-term follow-up. METHODS: Between October 2003 and March 2007 a total of 134 consecutive DUROM™ HRA in 121 patients were performed at our institution. Follow-up could be obtained in 101 unrevised patients (83%) at a mean time of 8.51 ± 0.97 years postoperatively and included patient-related outcome measurement, plain radiographs, MARS-MRI as well as whole blood metal ion assessment...
February 8, 2017: Hip International: the Journal of Clinical and Experimental Research on Hip Pathology and Therapy
https://www.readbyqxmd.com/read/28217898/metal-induced-changes-in-trivalent-chromium-resistant-alcaligenes-faecalis-vitsim2
#6
Shiny C Matilda, Chittibabu Shanthi
The changes induced in bacterial strains under stress conditions provide an insight into metal resistance strategies. Trivalent chromium resistant bacterium were isolated and identified by 16S rRNA gene sequencing and designated as Alcaligenes faecalis VITSIM2. The growth pattern was monitored. The organism also showed resistance to copper, cadmium, and certain antibiotics. The differentially expressed proteins in SDS PAGE were identified by mass spectrometry as flagellin and 50S ribosomal L36 protein. The morphological changes were identified by scanning electron microscopy...
February 20, 2017: Journal of Basic Microbiology
https://www.readbyqxmd.com/read/28217831/blood-metal-ion-concentrations-in-metal-on-metal-total-hip-arthroplasty
#7
Tadahiko Ohtsuru, Yuji Morita, Yasuaki Murata, Shuji Shimamoto, Yutaro Munakata, Yoshiharu Kato
INTRODUCTION: The hip placement with a metal-on-metal (MOM) bearing has been used for both surface replacement and total hip arthroplasty (THA). Use of MOM bearing for hip replacement reduces the wear compared to conventional bearings. METHODS: We prospectively assessed 30 patients who underwent unilateral MOM THA. A control group of 30 patients who underwent metal-on-polyethylene THA using the implants as the other group, except for bearing, were accessed. Blood samples were collected preoperatively and at 3- , 6- , 9- , 12- , 15- , 18- , and 24-month intervals...
February 20, 2017: European Journal of Orthopaedic Surgery & Traumatology: Orthopédie Traumatologie
https://www.readbyqxmd.com/read/28216949/in-vitro-evaluation-of-bioremediation-capacity-of-a-commercial-probiotic-bacillus-coagulans-for-chromium-vi-and-lead-ii-toxicity
#8
Pranoti Belapurkar, Pragya Goyal, Anand Kar
INTRODUCTION: The bioaccumulation of heavy metals including chromium (VI) (Cr (VI)) and lead (II) (Pb (II)) causes fatal toxicity in humans. Some naturally occurring bacterial genera such as Bacillus and Pseudomonas help in bioremediation of these heavy metals and some of the species of Bacillus are proven probiotics. However, no study has been conducted on Bacillus coagulans, which is a proven probiotic species of genus Bacillus. OBJECTIVES: The primary objective of the present study was to assess the potential of a proven probiotic, B...
October 2016: Journal of Pharmacy & Bioallied Sciences
https://www.readbyqxmd.com/read/28216891/effects-of-potassium-sulfate-k2so4-on-the-element-contents-polyphenol-content-antioxidant-and-antimicrobial-activities-of-milk-thistle-silybum-marianum
#9
Gulsum Yaldiz
BACKGROUND: Silybum marianum L. (Milk thistle) is native to the Mediterranean basin and is now widespread throughout the world. It's sprout is used as a herbal medicine for the treatment of liver disease for centuries. The seeds of milk thistle contain silymarin, an isomeric mixture of flavonolignans [silybin, silychristin, and silydianin]. Silymarin acts as a strong anti-hepatotoxic. OBJECTIVES: The objective of this study was to evaluate the influences of potassium sulfate [K2SO4] fertilizer doses on polyphenol content, some nutrient elements, antioxidant and antimicrobial activities of milk thistle at experimental fields of Ordu University in Turkey...
January 2017: Pharmacognosy Magazine
https://www.readbyqxmd.com/read/28215505/the-aging-micromechanisms-of-alumina-matrix-composite-amc-used-in-total-hip-arthroplasty
#10
Shinji Horie, Yasuhito Takahashi, Takaaki Shishido, Toshinori Masaoka, Toshiyuki Tateiwa, Kengo Yamamoto
BACKGROUND: The aim of the present study is to simulate and better understand the long-term interplay between alumina matrix composite (AMC) femoral head and aqueous environment. In particular, we focused on clarifying the role of alumina grains on zirconia phase stability and mechanical equilibrium in AMC head during aging processes in a clinically-relevant time frame. METHODS: The tested AMC head consists of an alumina matrix (82 vol.%) reinforced by yttria-stabilized zirconia (17 vol...
February 16, 2017: Journal of Orthopaedic Science: Official Journal of the Japanese Orthopaedic Association
https://www.readbyqxmd.com/read/28214935/promotive-role-of-5-aminolevulinic-acid-on-chromium-induced-morphological-photosynthetic-and-oxidative-changes-in-cauliflower-brassica-oleracea-botrytis-l
#11
Rehan Ahmad, Shafaqat Ali, Fakhir Hannan, Muhammad Rizwan, Muhammad Iqbal, Zaidul Hassan, Nudrat Aisha Akram, Saliha Maqbool, Farhat Abbas
Chromium (Cr) is among the most toxic pollutants in the environment that adversely affect the living organisms and physiological processes in different plants. The present study investigated the effect of 15 mg L(-1) of 5-aminolevulinic acid (ALA) on morpho-physiological attributes of cauliflower (Brassica oleracea botrytis L.) under different Cr concentrations (0, 10, 100, and 200 μM) in the growth medium. The results showed that Cr stress decreased the growth, biomass, photosynthetic, and gas exchange parameters...
February 18, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/28213250/novel-electroanalytical-method-based-on-the-electrostriction-phenomenon-and-its-application-to-determination-of-cr-vi-by-the-flow-injection-technique
#12
Marcin Wieczorek, Jolanta Kochana, Paweł Knihnicki, Karolina Wapiennik, Paweł Kościelniak
The electrostriction phenomenon is observed in membranes of thickness in the nanometer range, e.g. bilayer lipid membranes or self-assembled monolayers. Strong electrical field of 105-106V/cm in intensity appears when applying the potential lower than 1V to these membranes. Electrostatic forces change the dimensions of a dielectric, hence the membrane compression and decrease in thickness are observed. As a result, increase in the membrane capacitance is recorded. The presented work covers development and application of a new analytical method based on the innovative capacitance-to-frequency conversion method and flow technique...
May 1, 2017: Talanta
https://www.readbyqxmd.com/read/28210896/maximum-availability-and-mineralogical-control-of-chromium-released-from-aod-slag
#13
Junguo Li, Bao Liu, Yanan Zeng, Ziming Wang, Zhiyuan Gao
AOD (argon oxygen decarburization) slag is the by-product in the stainless steel refining process. Chromium existing in AOD slag can leach out and probably poses a serious threat to the environment. To assess the leaching toxicity of chromium released from AOD slag, the temperature-dependent maximum availability leaching test was performed. To determine the controlling mineralogical phases of chromium released from AOD slag, a Visual MINTEQ simulation was established based on Vminteq30 and the FactSage 7.0 database...
March 2017: Environmental Monitoring and Assessment
https://www.readbyqxmd.com/read/28209214/effects-of-concentrate-type-and-chromium-propionate-on-insulin-sensitivity-productive-and-reproductive-parameters-of-lactating-dairy-cows-consuming-excessive-energy
#14
T Leiva, R F Cooke, A P Brandão, U Pardelli, R O Rodrigues, F N Corrá, J L M Vasconcelos
This experiment compared insulin sensitivity parameters, milk production and reproductive outcomes in lactating dairy cows consuming excessive energy, and receiving in a 2×2 factorial arrangement design: (1) concentrate based on ground corn (CRN; n=13) or citrus pulp (PLP; n=13), and (2) supplemented (n=14) or not (n=12) with 2.5 g/day of chromium (Cr)-propionate. During the experiment (day 0 to 182), 26 multiparous, non-pregnant, lactating Gir×Holstein cows (initial days in milk=80±2) were offered corn silage for ad libitum consumption, and individually received concentrate formulated to allow diets to provide 160% of their daily requirements of net energy for lactation...
March 2017: Animal: An International Journal of Animal Bioscience
https://www.readbyqxmd.com/read/28207305/heavy-metal-presence-in-two-different-types-of-ice-cream-artisanal-ice-cream-italian-gelato-and-industrial-ice-cream
#15
D Conficoni, L Alberghini, E Bissacco, M Ferioli, V Giaccone
Ice cream, a popular product worldwide, is usually a milk-based product with other types of ingredients (fruit, eggs, cocoa, dried fruit, additives, and others). Different materials are used to obtain the desired taste, texture, consistency, and appearance of the final product. This study surveyed ice cream products available in Italy for heavy metals (lead, cadmium, chromium, tin, and arsenic). The differences between artisanal and industrial ice cream were also investigated because of the importance in the Italian diet and the diffusion of this ready-to-eat food...
February 16, 2017: Journal of Food Protection
https://www.readbyqxmd.com/read/28204952/a-preliminary-report-of-indigenous-fungal-isolates-from-contaminated-municipal-solid-waste-site-in-india
#16
Abhishek Kumar Awasthi, Akhilesh Kumar Pandey, Jamaluddin Khan
Municipal solid waste (MSW) containing harmful substances is a major concern in waste management and can cause adverse effects on diversity of fungi in soil. The main objective was to evaluate the fungal diversity inhabiting in the soil nearby MSW disposal site. The fungal strains were isolated in potato dextrose agar (PDA), media at temperatures 28 ± 1 °C by using standard serial dilution pour plate method, and appeared fungal colonies identified based on morphological characteristics. The overall most fungal diversity was found in soil sample collected from S5, followed by S4, S3, S1, and least in S2 site...
February 15, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/28203049/medium-term-review-of-the-asr-implant-system-a-single-surgeon-series
#17
M Curtin, E Murphy, C Bryan, D Jadaan, M Jadaan, D Bergin, C G Murphy, W Curtin
INTRODUCTION: Both ASR hip resurfacings and stemmed ASR XL arthroplasties have failed at high rates in several published series. We assessed a single surgeon series of these arthroplasties looking to identify factors associated with their failure. METHODS: All surgeries were performed by one surgeon. Patients were evaluated clinically, radiologically and with serial cobalt and chromium ion analysis. RESULTS: 274 implants were analysed - 152 ASR resurfacings and 122 ASR XL implants...
June 2017: Journal of Orthopaedics
https://www.readbyqxmd.com/read/28201937/selenium-methionine-and-chromium-methionine-supplementation-of-sheep-around-parturition-impacts-on-dam-and-offspring-performance
#18
Amir Mousaie, Reza Valizadeh, Mahmoud Chamsaz
To examine the effects of maternal energy restriction along with selenium-methionine (Se-Met) and chromium-methionine (Cr-Met) supplementation on performance of pregnant sheep and their offspring, the following treatments were allotted randomly to 40 multiparous Baluchi ewes (53.9 ± 1.15 kg of body weight [BW]) from 5 weeks prior to 5 weeks after parturition: (1) Control diet (60% and 100% of NRC energy requirements in pre- and post-partum, respectively); (2) Control diet plus 5 mg Se-Met/kg dry matter (DM); (3) Control diet plus 3 mg Cr-Met/kg DM and (4) Control diet plus 5 mg Se-Met and 3 mg Cr-Met/kg DM (Se-Cr-Met) of concentrate diet...
April 2017: Archives of Animal Nutrition
https://www.readbyqxmd.com/read/28198621/theoretical-investigation-of-the-gas-phase-reaction-of-cro-with-propane
#19
Jennifer E Beck, Timothy J Dudley
Transition metal oxide cations (e.g., MO(+)) have been shown to oxidize small alkanes in the gas-phase. The chromium oxide cation is of particular interest because it is more reactive than oxides of earlier transition metals but is more selective than oxides of later transition metals. The reaction of CrO(+) with propane has been shown to produce a number of products: propanol, propene, ethene, and hydrogen. Few theoretical studies exist for reactions of simple transition metal oxide cations with larger alkanes...
February 15, 2017: Journal of Physical Chemistry. A
https://www.readbyqxmd.com/read/28197942/influences-of-chromium-and-cadmium-on-the-development-of-black-soldier-fly-larvae
#20
Qiao Gao, Xiaoyun Wang, Wanqiang Wang, Chaoliang Lei, Fen Zhu
The black soldier fly Hermetia illucens is a good candidate for waste management. The harvested insects are rich in protein and have the potential to be used in animal feed. However, people are wary about heavy metals in waste. Therefore, it is necessary to understand how the uptake of heavy metals could affect H. illucens and where and to what extent metals are accumulated by the black soldier fly. Based on these considerations, developmental parameters were investigated in the different life stages of H. illucens fed an increasing concentration gradient of cadmium (Cd) and chromium (Cr); additionally, Cd and Cr distribution in the body parts of H...
February 14, 2017: Environmental Science and Pollution Research International
keyword
keyword
51494
1
2
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read
×

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"