keyword
https://read.qxmd.com/read/38530479/biodeterioration-of-polyethylene-by-bacillus-cereus-and-rhodococcus-equi-isolated-from-soil
#21
JOURNAL ARTICLE
Xinbei Liu, Xusheng Dong, Dandan Wang, Zhihong Xie
Polyethylene (PE), a non-biodegradable plastic, is widely used in agriculture as a mulch material, which causes serious plastic pollution when it is discarded. Recent studies have described the biodeterioration of PE by bacteria, but it is difficult for a single bacterial species to effectively degrade PE plastic. We isolated two strains with PE-degrading ability, Bacillus cereus (E1) and Rhodococcus equi (E3), from the soil attached to plastic waste on the south side of Mount Tai, China, using a medium with PE plastic as the only carbon source...
March 26, 2024: International Microbiology: the Official Journal of the Spanish Society for Microbiology
https://read.qxmd.com/read/38530013/the-influence-of-frequency-volume-and-viscosity-on-the-ultrasonic-atomization-threshold-of-sessile-droplets
#22
JOURNAL ARTICLE
Josué Meneses-Díaz, Yolanda Vargas-Hernández, Eduardo Cancino-Jaque, Luis Gaete-Garretón
In this research, we present a study on the atomization threshold (ATh) of sessile droplets, analyzing its relationship with the excitation frequency fexc (55-48 kHz), droplet volume Vdrop (1-100 μl), and droplet viscosity μ (1-6 mPa⋅s). The investigation focused on the atomization thresholds using ultrasonic excitation of distilled water droplets and water- polyethylene glycol (PEG)-8000 mixtures deposited on vibrating surfaces. The obtained results are compared with previously reported theoretical models...
March 1, 2024: Journal of the Acoustical Society of America
https://read.qxmd.com/read/38529883/long-term-follow-up-of-total-hip-arthroplasty-using-polyethylene-ceramic-composite-sandwich-liner
#23
JOURNAL ARTICLE
Daniel Rodríguez-Pérez, Thiago Carnaval, Marcos-Del-Carmen Rodríguez, Antonio Coscujuela-Maña, José-Luis Agulló, Sebastián Videla
INTRODUCTION: Ceramic-on-ceramic bearings have been widely used since their introduction in the 1970s. First-generation ceramics have very high fracture (breakage) rates. To overcome this, in the 1990s, modular cotyloid insert designs were developed, consisting of a ceramic and polyethylene composite (sandwich-type) liner; however, high implant fracture rates were observed in the medium term. We aimed to estimate the cumulative incidences of revision surgery (implant failure) and implant failure due to fractures, survival rates (time-to-revision surgery and time-to-fracture), and the long-term clinical and radiological outcomes in our series...
March 26, 2024: Hip International: the Journal of Clinical and Experimental Research on Hip Pathology and Therapy
https://read.qxmd.com/read/38529757/supramolecular-complexation-of-c-60-with-branched-polyethylene
#24
JOURNAL ARTICLE
Adam A Pollit, Garima Garg, M Nazir Tahir, Audithya Nyayachavadi, Peng Xiang, Eric Landry, Amer Ebied, Simon Rondeau-Gagné
Fullerene C60 is a ubiquitous material for application in organic electronics and nanotechnology, due to its desirable optoelectronic properties including good molecular orbital alignment with electron-rich donor materials, as well as high and isotropic charge carrier mobility. However, C60 possesses two limitations that hinder its integration into large-scale devices: (1) poor solubility in common organic solvents leading to expensive device processing, and (2) poor optical absorbance in the visible portion of the spectrum...
March 26, 2024: Physical Chemistry Chemical Physics: PCCP
https://read.qxmd.com/read/38528920/recent-advances-in-microbial-and-enzymatic-engineering-for-the-biodegradation-of-micro-and-nanoplastics
#25
REVIEW
Jaewon Choi, Hongbin Kim, Yu-Rim Ahn, Minse Kim, Seona Yu, Nanhyeon Kim, Su Yeon Lim, Jeong-Ann Park, Suk-Jin Ha, Kwang Suk Lim, Hyun-Ouk Kim
This review examines the escalating issue of plastic pollution, specifically highlighting the detrimental effects on the environment and human health caused by microplastics and nanoplastics. The extensive use of synthetic polymers such as polyethylene (PE), polyethylene terephthalate (PET), and polystyrene (PS) has raised significant environmental concerns because of their long-lasting and non-degradable characteristics. This review delves into the role of enzymatic and microbial strategies in breaking down these polymers, showcasing recent advancements in the field...
March 20, 2024: RSC Advances
https://read.qxmd.com/read/38528095/effects-of-prenatal-thc-vapor-exposure-on-body-weight-glucose-metabolism-and-feeding-behaviors-in-chow-and-high-fat-diet-fed-rats
#26
JOURNAL ARTICLE
Catherine Hume, Samantha L Baglot, Lucia Javorcikova, Savannah H M Lightfoot, Jessica Scheufen, Matthew N Hill
BACKGROUND: 4-20% of people report using cannabis during pregnancy, thereby it is essential to assess the associated risks. There is some evidence that prenatal cannabis exposure (PCE) may be associated with increased risk for developing of obesity and diabetes later in life, however this has not been well explored under controlled conditions. The aim of this study was to use a translational THC vapor model in rodents to characterize the effects of PCE on adiposity, glucose metabolism, and feeding patterns in adulthood, with focus on potential sex differences...
March 25, 2024: International Journal of Obesity
https://read.qxmd.com/read/38527681/polyethylene-glycol-crosslinked-modified-chitosan-halloysite-nanotube-composite-aerogel-microspheres-for-efficient-adsorption-of-melanoidin
#27
JOURNAL ARTICLE
Zhaoyang Wang, Zhikun Lv, Qianyu Su, Xinyu Lai, Zhi Huang, Kai Li, Ligao Deng, Jianbin Li
Melanoidins are widely present in molasses wastewater and are dark-colored macromolecules that are hazardous to the environment. Currently, adsorption methods can effectively remove melanoidins from wastewater. However, existing adsorbents have shown unsatisfactory removal efficiency for melanoidins, making practical application challenging. Polyethylene glycol crosslinked modified chitosan/halloysite nanotube composite aerogel microspheres (PCAM@HNTs) were developed as a highly efficient adsorbent for melanoidins...
March 23, 2024: International Journal of Biological Macromolecules
https://read.qxmd.com/read/38527586/combined-effects-of-polyethylene-microplastics-and-carbendazim-on-eisenia-fetida-a-comprehensive-ecotoxicological-study
#28
JOURNAL ARTICLE
Krishna Gautam, Shreya Dwivedi, Rahul Verma, Beena Vamadevan, Satyakam Patnaik, Sadasivam Anbumani
Microplastic (MP) pollution is becoming an emerging environmental concern across aquatic and terrestrial ecosystems. Plastic mulching and the use of pesticides in agriculture can lead to microplastics and agrochemicals in soil, which can result in unintended exposure to non-target organisms. The combined toxicity of multiple stressors represents a significant paradigm shift within the field of ecotoxicology, and its exploration within terrestrial ecosystems involving microplastics is still relatively limited...
March 23, 2024: Environmental Pollution
https://read.qxmd.com/read/38527583/identification-and-quantification-of-microplastics-in-salts-by-complementary-approaches-using-pyrolysis-gas-chromatography-quadrupole-time-of-flight-mass-spectrometry-py-gc-qtofms-and-laser-direct-infrared-ldir-chemical-imaging-analysis
#29
JOURNAL ARTICLE
Hongying Gao, Heng Wang, Yuchao Wang, Yi Lin, Jianbo Yan, Heqing Shen
Microplastics (MPs) and nanoplastics (NPs) have been suspected as contaminants in various foodstuffs, including salts, all over the world. Regarding the different sizes and polymer types, the mass concentrations of actual plastic particles in salt are not very clear. The purpose of this study is to develop a scalable method for qualitative and quantitative analysis of MPs and NPs by using Pyrolysis Gas Chromatography Quadrupole-Time of Flight mass spectrometry (Py-GC/QTOFMS) to detect their mass concentrations in salt samples...
March 23, 2024: Environmental Pollution
https://read.qxmd.com/read/38527581/biomonitoring-of-microplastics-anthropogenic-microfibres-and-glass-retroreflective-beads-by-marine-macroalgae
#30
JOURNAL ARTICLE
Cerys Rimmer, Jodie Fisher, Andrew Turner
Microplastics and other microscopic debris are a concern in the coastal environment but measurements in the water column and sediment are often problematic and rely on non-standardised and highly variable methodologies. To this end, we explore the potential of different species of temperate-cold marine macroalgae as passive biomonitors of anthropogenic microparticles at three contrasting locations in southwest England. Specifically, fronds from samples of fucoids and Ulva lactuca (n = 9 in total, and three from each location) have been sectioned and analysed directly under a microscope and anthropogenic microparticles counted and subsequently characterised for chemical composition...
March 23, 2024: Environmental Pollution
https://read.qxmd.com/read/38525513/peculiar-reaction-of-oxidized-zirconium-from-a-total-knee-arthroplasty-prosthesis-a-case-report
#31
JOURNAL ARTICLE
Jong Keun Seon, Khairul Anwar Ayob, Myung Giun Noh, Hong Yeol Yang
Oxidized zirconium (OxiniumTM) prostheses, made up of a metallic alloy of zirconium with a ceramic surface formed by oxidizing the outer layer, were developed as an alternative bearing surface to reduce polyethylene wear and decrease failure of total knee arthroplasty (TKA). We report a unique catastrophic failure of an Oxinium TKA with consequent accelerated wear and severe metallosis. Intraoperatively, we observed extensive wear grooving of the femoral component with exposure of the underlying silver layers and the complete wear of polyethylene on the medial side...
January 2024: Acta Orthopaedica et Traumatologica Turcica
https://read.qxmd.com/read/38525136/pulmonary-toxicity-assessment-of-polypropylene-polystyrene-and-polyethylene-microplastic-fragments-in-mice
#32
JOURNAL ARTICLE
Isaac Kwabena Danso, Jong-Hwan Woo, Seung Hoon Baek, Kilsoo Kim, Kyuhong Lee
UNLABELLED: Polypropylene (PP), polystyrene (PS), and polyethylene (PE) plastics are commonly used in household items such as electronic housings, food packaging, bottles, bags, toys, and roofing membranes. The presence of inhalable microplastics in indoor air has become a topic of concern as many people spent extended periods of time indoors during the COVID-19 pandemic lockdown restrictions, however, the toxic effects on the respiratory system are not properly understood. We examined the toxicity of PP, PS, and PE microplastic fragments in the pulmonary system of C57BL/6 mice...
April 2024: Toxicological Research
https://read.qxmd.com/read/38524880/a-novel-dna-aptamer-probe-recognizing-castration-resistant-prostate-cancer-in-vitro-and-in-vivo-based-on-cell-selex
#33
JOURNAL ARTICLE
Jinman Zhong, Duoduo Liu, Quanxin Yang, Jianke Ding, Xin Chen
BACKGROUND: Early recognition of castration-resistant state is of significance for timely adjustment of treatment regimens and improvement of prognosis. PURPOSE: This study aims to screen new aptamers CRda8 and CRda21 which recognize castration resistant prostate cancer (CRPC) cells with high affinity and specificity by SELEX technology. METHODS: The enrichment of specific aptamer candidates was monitored by flow cytometric analysis. The affinity and specificity of aptamer candidates were evaluated by flow cytometry and immunofluorescence assay...
2024: Drug Design, Development and Therapy
https://read.qxmd.com/read/38524440/tensile-strength-statistics-and-fracture-mechanism-of-ultrahigh-molecular-weight-polyethylene-fibers-on-the-weibull-distribution
#34
JOURNAL ARTICLE
Jinyou Ding, Gonglin Chen, Wei Huang, Jinlong Cheng, Ting Li, Chunzu Cheng, Jigang Xu
To study the distribution of ultrahigh molecular weight polyethylene fiber (UHMWPE) strength, three groups of UHMWPE fibers were spun by the gel spinning method, which was undrafted raw fibers (with high strain at break) and fibers with different prespinning and postspinning draw ratios. It is found that even when the strain at break (εb ) > 46%, the tensile strength of the fiber still obeys the Weibull distribution. The draw ratio has a great influence on the distribution of fiber strength, especially the draw ratios of the spinneret in the prespinning process...
March 19, 2024: ACS Omega
https://read.qxmd.com/read/38523704/engineering-lnps-with-polysarcosine-lipids-for-mrna-delivery
#35
JOURNAL ARTICLE
Diana D Kang, Xucheng Hou, Leiming Wang, Yonger Xue, Haoyuan Li, Yichen Zhong, Siyu Wang, Binbin Deng, David W McComb, Yizhou Dong
Since the approval of the lipid nanoparticles (LNP)-mRNA vaccines against the SARS-CoV-2 virus, there has been an increased interest in the delivery of mRNA through LNPs. However, current LNP formulations contain PEG lipids, which can stimulate the generation of anti-PEG antibodies. The presence of these antibodies can potentially cause adverse reactions and reduce therapeutic efficacy after administration. Given the widespread deployment of the COVID-19 vaccines, the increased exposure to PEG may necessitate the evaluation of alternative LNP formulations without PEG components...
July 2024: Bioactive Materials
https://read.qxmd.com/read/38523641/research-progress-on-the-pegylation-of-therapeutic-proteins-and-peptides-tpps
#36
REVIEW
Chunxiao Li, Ting Li, Xinya Tian, Wei An, Zhenlong Wang, Bing Han, Hui Tao, Jinquan Wang, Xiumin Wang
With the rapid advancement of genetic and protein engineering, proteins and peptides have emerged as promising drug molecules for therapeutic applications. Consequently, there has been a growing interest in the field of chemical modification technology to address challenges associated with their clinical use, including rapid clearance from circulation, immunogenicity, physical and chemical instabilities (such as aggregation, adsorption, deamination, clipping, oxidation, etc.), and enzymatic degradation. Polyethylene glycol (PEG) modification offers an effective solution to these issues due to its favorable properties...
2024: Frontiers in Pharmacology
https://read.qxmd.com/read/38522540/quantitative-analysis-of-microplastics-in-water-environments-based-on-raman-spectroscopy-and-convolutional-neural-network
#37
JOURNAL ARTICLE
Yinlong Luo, Wei Su, Mir Fazle Rabbi, Qihang Wan, Dewen Xu, Zhenfeng Wang, Shusheng Liu, Xiaobin Xu, Jian Wu
With the increasing interest in microplastics (MPs) pollutants, quantitative analysis of MPs in water environment is an important issue. Vibrational spectroscopy, represented by Raman spectroscopy, is widely used in MP detection because they can provide unique fingerprint characteristics of chemical components of MPs, but it is difficult to provide quantitative information. In this paper, an ingenious method for quantitative analysis of MPs in water environment by combining Raman spectroscopy and convolutional neural network (CNN) is proposed...
March 22, 2024: Science of the Total Environment
https://read.qxmd.com/read/38522197/plant-growth-promoting-bacteria-improve-the-cd-phytoremediation-efficiency-of-soils-contaminated-with-pe-cd-complex-pollution-by-influencing-the-rhizosphere-microbiome-of-sorghum
#38
JOURNAL ARTICLE
Yong-Qi Liu, Yan Chen, Yu-Ying Li, Chuan-Yu Ding, Bai-Lian Li, Hui Han, Zhao-Jin Chen
Composite pollution by microplastics and heavy metals poses a potential threat to the soilplant system and has received increasing attention. Plant growth-promoting bacteria (PGPB) have good application potential for the remediation of combined microplastic and heavy metal pollution, but few related studies exist. The present study employed a pot experiment to investigate the effects of inoculation with the PGPB Bacillus sp. SL-413 and Enterobacter sp. VY-1 on sorghum growth and Cd accumulation under conditions of combined cadmium (Cd) and polyethylene (PE) pollution...
March 20, 2024: Journal of Hazardous Materials
https://read.qxmd.com/read/38522178/controlling-spatial-distribution-of-functional-lipids-in-a-supported-lipid-bilayer-prepared-from-vesicles
#39
JOURNAL ARTICLE
Hyun-Su Lee, Ye Chan Kim, Zhicheng Wang, Jacob S Brenner, Vladimir R Muzykantov, Jacob W Myerson, Russell J Composto
Conjugating biomolecules, such as antibodies, to bioconjugate moieties on lipid surfaces is a powerful tool for engineering the surface of diverse biomaterials, including cells and nanoparticles. We developed supported lipid bilayers (SLBs) presenting well-defined spatial distributions of functional moieties as models for precisely engineered functional biomolecular-lipid surfaces. We used quartz crystal microbalance with dissipation (QCM-D) and atomic force microscopy (AFM) to determine how vesicles containing a mixture of 1,2-dipalmitoyl-sn-glycero-3-phosphatidylcholine (DPPC) and 1,2-distearoyl-sn-glycero-3-phosphoethanolamine-N-[azido(polyethylene glycol)-2000] (DSPE-PEG-N3 ) form SLBs as a function of the lipid phase transition temperature (Tm )...
March 11, 2024: Journal of Colloid and Interface Science
https://read.qxmd.com/read/38522160/upcycle-polyethylene-terephthalate-waste-by-photoreforming-bifunction-of-pt-cocatalyst
#40
JOURNAL ARTICLE
Xiaochi Han, Ming Jiang, Huaxing Li, Rongjie Li, Nashwan H M Sulaiman, Tao Zhang, Hongjiao Li, Lirong Zheng, Jiake Wei, Lirong He, Xuemei Zhou
Upcycle polyethylene terephthalate (PET) waste by photoreforming (PR) is a sustainable and green approach to tackle environmental problems but with challenges to obtain valuable oxidation products and high purity hydrogen simultaneously. Noble metal cocatalysts are essential to enhance the overall PR reaction efficacy. In this work, TiO2 nanotubes (TiO2 NTs) decorated with single Pt atoms (Pt1 /TiO2 ) or Pt nanoparticles (PtNPs /TiO2 ) are used in the photoreforming reaction (in one batch), and the oxidation products from ethylene glycol (EG, hydrolysed product of PET) in liquid phase and hydrogen are detected...
March 13, 2024: Journal of Colloid and Interface Science
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