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https://www.readbyqxmd.com/read/28809623/how-to-choose-between-the-implant-materials-steel-and-titanium-in-orthopedic-trauma-surgery-part-2-biological-aspects
#1
S M Perren, P Regazzoni, A A Fernandez
BIOLOGICAL ASPECTS OF STEEL AND TITANIUM AS IMPLANT MATERIAL IN ORTHOPEDIC TRAUMA SURGERY The following case from the ICUC database, where a titanium plate was implanted into a flourishing infection, represents the clinical experience leading to preferring titanium over steel. (Fig. 1) (6). Current opinions regarding biological aspects of implant function. The "street" opinions regarding the biological aspects of the use of steel versus titanium as a surgical trauma implant material differ widely. Statements of opinion leaders range from "I do not see any difference in the biological behavior between steel and titanium in clinical application" to "I successfully use titanium implants in infected areas in a situation where steel would act as foreign body "sustaining" infection...
2017: Acta Chirurgiae Orthopaedicae et Traumatologiae Cechoslovaca
https://www.readbyqxmd.com/read/28797572/hyperosmolar-metabolic-acidosis-in-burn-patients-exposed-to-glycol-based-topical-antimicrobials-a-systematic-review
#2
REVIEW
Tom Leibson, Paige Davies, Cheri Nickel, Gideon Koren
BACKGROUND: The well documented susceptibility of burn patients to acquired infections via damaged skin mandates application of antimicrobial agents. These agents are dissolved in various vehicles that augment skin absorption thus allowing greater efficacy. Polyethylene glycol (PEG) and Propylene glycol (PropG) are among the most commonly used vehicles, and both have been used in numerous medications and cosmetic products over the past few decades. Rarely, burn patients treated with agents containing these glycols present with a life threatening systemic toxidrome of hyperosmolar metabolic acidosis...
August 7, 2017: Burns: Journal of the International Society for Burn Injuries
https://www.readbyqxmd.com/read/28777958/in-situ-synthesis-of-3d-ga-on-titanium-wire-as-a-binder-free-electrode-for-electro-fenton-removing-of-edta-ni
#3
Shulong Wen, Zhuyu Niu, Zhen Zhang, Lianghao Li, Yuancai Chen
Ethylenediaminetetraacetic acid (EDTA) could form stable complexes with toxic metals such as nickel due to its strong chelation. The three-dimensional (3D) macroporous graphene aerogels (GA), which was in-situ assembled by reduced graphene oxide (rGO) sheets on titanium wire as binder-free electrode, was presented as cathode for the degradation of EDTA-Ni in Electro-Fenton process. The X-ray diffraction (XRD), Scanning Electron Microscopy (SEM), Transmission Electron Microscope (TEM) and Brunauer-Emmett-Teller (BET) results indicated 3D GA formed three dimensional architecture with large and homogenous macropore structure and surface area...
July 8, 2017: Journal of Hazardous Materials
https://www.readbyqxmd.com/read/28771346/structural-and-crystallographic-information-from-61-ni-solid-state-nmr-spectroscopy-diamagnetic-nickel-compounds
#4
Peter Werhun, David L Bryce
Despite the significance of nickel compounds, NMR spectroscopy of the active nickel isotope (61)Ni remains a largely unexplored field. While nickel(0) compounds have been studied by (61)Ni NMR in solution, solid-state experiments have been limited to Knight shift studies of nickel metal and nickel intermetallics. In conjunction with an NMR study of their ligands and (61)Ni relativistic computations, the first (61)Ni solid-state NMR (SSNMR) spectra of diamagnetic compounds are reported here. Specifically, bis(1,5-cyclooctadiene)nickel(0) [Ni(cod)2], tetrakis(triphenylphosphite)nickel(0) [Ni[P(OPh)3]4], and tetrakis(triphenylphosphine)nickel(0) [Ni(PPh3)4] were studied...
August 3, 2017: Inorganic Chemistry
https://www.readbyqxmd.com/read/28771169/effects-of-metal-micro-and-nano-particles-on-hascs-an-in-vitro-model
#5
Silvia Palombella, Cristina Pirrone, Federica Rossi, Ilaria Armenia, Mario Cherubino, Luigi Valdatta, Mario Raspanti, Giovanni Bernardini, Rosalba Gornati
As the knowledge about the interferences of nanomaterials on human staminal cells are scarce and contradictory, we undertook a comparative multidisciplinary study based on the size effect of zero-valent iron, cobalt, and nickel microparticles (MPs) and nanoparticles (NPs) using human adipose stem cells (hASCs) as a model, and evaluating cytotoxicity, morphology, cellular uptake, and gene expression. Our results suggested that the medium did not influence the cell sensitivity but, surprisingly, the iron microparticles (FeMPs) resulted in being toxic...
August 3, 2017: Nanomaterials
https://www.readbyqxmd.com/read/28769906/effect-of-nickel-and-cobalt-on-methanogenic-enrichment-cultures-and-role-of-biogenic-sulfide-in-metal-toxicity-attenuation
#6
Lara M Paulo, Javier Ramiro-Garcia, Simon van Mourik, Alfons J M Stams, Diana Z Sousa
Metals play an important role in microbial metabolism by acting as cofactors for many enzymes. Supplementation of biological processes with metals may result in improved performance, but high metal concentrations are often toxic to microorganisms. In this work, methanogenic enrichment cultures growing on H2/CO2 or acetate were supplemented with trace concentrations of nickel (Ni) and cobalt (Co), but no significant increase in methane production was observed in most of the tested conditions. However, high concentrations of these metals were detrimental to methanogenic activity of the cultures...
2017: Frontiers in Microbiology
https://www.readbyqxmd.com/read/28762312/cadmium-organ-toxicity-and-therapeutic-approaches-a-review-on-brain-kidney-and-testis-damage
#7
Mariagrazia Rinaldi, Antonio Micali, Herbert Marini, Elena Bianca Adamo, Domenico Puzzolo, Antonina Pisani, Vincenzo Trichilo, Domenica Altavilla, Francesco Squadrito, Letteria Minutoli
BACKGROUND: Cadmium (Cd) is a heavy metal particularly hazardous for human health, as it is highly diffused and, therefore, a ubiquitous environmental toxicant. In fact, in the general population, the main sources of exposure are food, cigarette smoking, inhalation of ambient air, drinking water, contaminated soil or dust. Furthermore, an occupational exposure usually involves human during mining, fume inhalation or manufacturing nickel-cadmium battery, electroplating and paint pigments that utilize Cd...
August 1, 2017: Current Medicinal Chemistry
https://www.readbyqxmd.com/read/28757588/complexation-based-detection-of-nickel-ii-at-a-graphene-chelate-probe-in-the-presence-of-cobalt-and-zinc-by-adsorptive-stripping-voltammetry
#8
Keagan Pokpas, Nazeem Jahed, Priscilla G Baker, Emmanuel I Iwuoha
The adsorptive stripping voltammetric detection of nickel and cobalt in water samples at metal film electrodes has been extensively studied. In this work, a novel, environmentally friendly, metal-free electrochemical probe was constructed for the ultra-trace determination of Ni(2+) in water samples by Adsorptive Cathodic Stripping Voltammetry (AdCSV). The electrochemical platform is based on the adsorptive accumulation of Ni(2+) ions directly onto a glassy carbon electrode (GCE) modified with dimethylglyoxime (DMG) as chelating agent and a Nafion-graphene (NGr) nanocomposite to enhance electrode sensitivity...
July 25, 2017: Sensors
https://www.readbyqxmd.com/read/28753974/a-noncontact-dibutyl-phthalate-sensor-based-on-a-wireless-electrodeless-qcm-d-modified-with-nano-structured-nickel-hydroxide
#9
Daqi Chen, Xiyang Sun, Kaihuan Zhang, Guokang Fan, You Wang, Guang Li, Ruifen Hu
Dibutyl phthalate (DBP) is a widely used plasticizer which has been found to be a reproductive and developmental toxicant and ubiquitously existing in the air. A highly sensitive method for DBP monitoring in the environment is urgently needed. A DBP sensor based on a homemade wireless-electrodeless quartz crystal microbalance with dissipation (QCM-D) coated with nano-structured nickel hydroxide is presented. With the noncontact configuration, the sensing system could work at a higher resonance frequency (the 3rd overtone) and the response of the system was even more stable compared with a conventional quartz crystal microbalance (QCM)...
July 21, 2017: Sensors
https://www.readbyqxmd.com/read/28751028/toxic-metals-biomonitoring-based-on-prey-predator-interactions-and-environmental-forensics-techniques-a-study-at-the-romanian-ukraine-cross-border-of-the-black-sea
#10
Stefan-Adrian Strungaru, Mircea Nicoara, Carmen Teodosiu, Dragos Micu, Gabriel Plavan
Marine cross-border areas are ideal for monitoring pollutants so as to increase ecosystems protection. This study was conducted at the Romanian-Ukraine border of the Black Sea to reveal evidence of contamination with toxic metals based on biomonitoring of: cadmium, lead, total chromium, nickel and copper at different water depths and prey-predator interactions, combined with environmental forensics techniques of biological sampling and separation in witnesses size groups. The species used were Mytilus galloprovincialis L...
July 25, 2017: Marine Pollution Bulletin
https://www.readbyqxmd.com/read/28748734/biochemical-alterations-induced-by-nickel-oxide-nanoparticles-in-female-wistar-albino-rats-after-acute-oral-exposure
#11
Naresh Dumala, Bhanuramya Mangalampalli, Kalyan Kamal Srinivasa Sarika, Paramjit Grover
CONTEXT: Nickel oxide (NiO) nanoparticles (NPs) with appropriate surface chemistry have been widely used for their potential new applications in biomedical industry. Increased usage of these NPs, enhances the chance of exposure of personnel involved in the work place. OBJECTIVE: This study was designed to assess the ability of NiO NPs to cause biochemical alterations post-acute oral exposure in female Wistar rats. MATERIALS AND METHODS: Rats were administered with 125, 250, and 500 mg/kg doses of NiO NPs for haematological, biochemical and histopathological studies...
July 27, 2017: Biomarkers: Biochemical Indicators of Exposure, Response, and Susceptibility to Chemicals
https://www.readbyqxmd.com/read/28733784/environmental-impact-of-coal-mining-and-coal-seam-gas-production-on-surface-water-quality-in-the-sydney-basin-australia
#12
A Ali, V Strezov, P Davies, I Wright
The extraction of coal and coal seam gas (CSG) will generate produced water that, if not adequately treated, will pollute surface and groundwater systems. In Australia, the discharge of produced water from coal mining and related activities is regulated by the state environment agency through a pollution licence. This licence sets the discharge limits for a range of analytes to protect the environment into which the produced water is discharged. This study reports on the impact of produced water from coal mine activities located within or discharging into high conservation environments, such as National Parks, in the outer region of Sydney, Australia...
August 2017: Environmental Monitoring and Assessment
https://www.readbyqxmd.com/read/28726228/microwave-irradiation-and-citric-acid-assisted-seed-germination-and-phytoextraction-of-nickel-ni-by-brassica-napus-l-morpho-physiological-and-biochemical-alterations-under-ni-stress
#13
Mujahid Farid, Shafaqat Ali, Muhammad Rizwan, Rashid Saeed, Hafiz Muhammad Tauqeer, Rasham Sallah-Ud-Din, Ahmed Azam, Nighat Raza
The complex bio-geochemistry of soil allows pollutant to persist for a longer period of time which further decreased the fertility and natural composition of land. Nickel, an inorganic pollutant, coming from a wide range of industrial and manufacturing units possesses serious threat to soil degradation and crop productivity around the world. The present study was carried to evaluate the combined role of microwave irradiation (MR) and citric acid (CA) on the phytoextraction potential of Brassica napus L. under Ni stress...
July 20, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/28716727/systematic-review-and-meta-analysis-links-autism-and-toxic-metals-and-highlights-the-impact-of-country-development-status-higher-blood-and-erythrocyte-levels-for-mercury-and-lead-and-higher-hair-antimony-cadmium-lead-and-mercury
#14
REVIEW
Amene Saghazadeh, Nima Rezaei
BACKGROUND: Autism spectrum disorder (ASD) is a heterogeneous neurodevelopmental disorder that affects cognitive and higher cognitive functions. Increasing prevalence of ASD and high rates of related comorbidities has caused serious health loss and placed an onerous burden on the supporting families, caregivers, and health care services. Heavy metals are among environmental factors that may contribute to ASD. However, due to inconsistencies across studies, it is still hard to explain the association between ASD and toxic metals...
July 14, 2017: Progress in Neuro-psychopharmacology & Biological Psychiatry
https://www.readbyqxmd.com/read/28712078/effects-based-spatial-assessment-of-contaminated-estuarine-sediments-from-bear-creek-baltimore-harbor-md-usa
#15
Sharon E Hartzell, Michael A Unger, Beth L McGee, Lance T Yonkos
Estuarine sediments in regions with prolonged histories of industrial activity are often laden to significant depths with complex contaminant mixtures, including trace metals and persistent organic pollutants. Given the complexity of assessing risks from multi-contaminant exposures, the direct measurement of impacts to biological receptors is central to characterizing contaminated sediment sites. Though biological consequences are less commonly assessed at depth, laboratory-based toxicity testing of subsurface sediments can be used to delineate the scope of contamination at impacted sites...
July 15, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/28712076/nickel-stressed-responses-of-rice-in-ni-subcellular-distribution-antioxidant-production-and-osmolyte-accumulation
#16
Muhammad Rizwan, Muhammad Imtiaz, Zhihua Dai, Sajid Mehmood, Muhammad Adeel, Jinchang Liu, Shuxin Tu
Nickel has been found a key pollutant in farmlands of central and south China, and understanding of Ni toxicity in rice is of great significance in safety production of rice and remediation of Ni polluted paddy soils. The present study aimed to investigate the uptake and subcellular distribution of Ni, antioxidant production, and osmolyte accumulation of rice (Oryza sativa L., cv. yangliangyou 6) plants exposed to excessive Ni concentrations to gain an insight into Ni-induced phytotoxicity. Results revealed that exposure of rice seedlings to high Ni concentrations resulted a decline in root and shoot lengths and fresh weight (FW) and dry weight (DW) of rice plants, which are in connection with the depletion of the contents of photosynthetic pigments...
July 15, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/28711835/synergistic-green-extraction-of-nickel-ions-from-electroplating-waste-via-mixtures-of-chelating-and-organophosphorus-carrier
#17
Raja Norimie Raja Sulaiman, Norasikin Othman
The discharge of electroplating waste containing nickel ions has led to environmental issues owing to the toxicity problem mainly to the aquatic organisms and humans. Liquid-liquid extraction offers a great potential treatment for nickel removal with several advantages of simple, high efficiency and high separation factor. In this study, a green synergistic liquid-liquid extraction of nickel ions from electroplating waste solution using chelating oxime (LIX63) and organophosphorus (D2EHPA) carriers individually as well as their synergistic mixture has been studied...
June 27, 2017: Journal of Hazardous Materials
https://www.readbyqxmd.com/read/28711828/thioglycolate-based-task-specific-ionic-liquids-metal-extraction-abilities-vs-acute-algal-toxicity
#18
Sonja Platzer, Raphlin Leyma, Sara Wolske, Wolfgang Kandioller, Esther Heid, Christian Schröder, Michael Schagerl, Regina Krachler, Franz Jirsa, Bernhard K Keppler
We studied the extraction behavior of two thioglycolate-based ionic liquids (ILs), for heavy metals from aqueous solutions; substances of interest were methyltrioctylammonium S-hexyl thioglycolate [N1888][C6SAc] and methyltrioctylphosphonium S-hexyl thioglycolate [P1888][C6SAc]. Theses ILs previously have shown very good extraction abilities towards cadmium and copper, therefore we investigated time-dependent metal removal experiments with aqueous solutions of cobalt(II), nickel(II) and zinc(II). The highest distribution ratio (RIL/Water) was determined for zinc (RIL/Water=2000)...
June 23, 2017: Journal of Hazardous Materials
https://www.readbyqxmd.com/read/28704691/inhibition-in-fertilisation-of-coral-gametes-following-exposure-to-nickel-and-copper
#19
Francesca Gissi, Jenny Stauber, Amanda Reichelt-Brushett, Peter L Harrison, Dianne F Jolley
The mining and production of nickel in tropical regions have the potential to impact on ecologically valuable tropical marine ecosystems. Currently, few data exist to assess the risks of nickel exposure to tropical ecosystems and to derive ecologically relevant water quality guidelines. In particular, data are lacking for keystone species such as scleractinian corals, which create the complex structural reef habitats that support many other marine species. As part of a larger study developing risk assessment tools for nickel in the tropical Asia-Pacific region, we investigated the toxicity of nickel on fertilisation success in three species of scleractinian corals: Acropora aspera, Acropora digitifera and Platygyra daedalea...
July 10, 2017: Ecotoxicology and Environmental Safety
https://www.readbyqxmd.com/read/28690165/p53-mapkapk-2-and-caspases-regulate-nickel-oxide-nanoparticles-induce-cell-death-and-cytogenetic-anomalies-in-rats
#20
Quaiser Saquib, Sabry M Attia, Sabiha M Ansari, Abdullah Al-Salim, Mohammad Faisal, Abdulrahman A Alatar, Javed Musarrat, Xiaowei Zhang, Abdulaziz A Al-Khedhairy
The unique properties of nickel oxide nanoparticles (NiO-NPs) distinguish it from traditional nickel containing materials, and enable its industrial application as an advanced nanomaterial. Despite the benefits, the in vivo toxicological studies on NiO-NPs have been mainly focused on its pulmonary pathology. However, NiO-NPs exposure via oral route and its subsequent toxic effects in exposed animals are still lacking. Hence, we evaluated the NiO-NPs oral toxicity in male Wistar rats. NiO-NPs induced significant increase in chromosomal aberrations (CAs), micronuclei (MN) formation and, DNA damage in rats...
July 6, 2017: International Journal of Biological Macromolecules
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