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Plant hyperaccumulators: a state-of-the-art review on mechanism of heavy metal transport and sequestration.

Soils contaminated with heavy metals (HMs) pose severe consequences to living organisms, primarily affecting human health. During the past two decades, researchers have focused on hyperaccumulator plant species to augment the cleanup efforts of contaminated soils. Plants are continually exposed to HMs in the environment since they are sessile organisms. Plants that do not hyperaccumulate metals are vulnerable to high metal concentrations. Their root vacuoles create complexes with metal ligands as a detoxifying approach. On the other hand, metal-hyperaccumulating plants have evolved internal re…

Synthesis, characterization, and anticancer evaluation of nano-sized schiff base metal chelates.

Nano-sized bivalent metal chelates of thiophene-thiol Schiff's base Zn(II), Cu(II), Ni(II), and Co(II) were investigated by spectroscopic methods and quantum mechanical calculations. These chelates adopt the overall formula [M(TTSB)2], given that TTSB = [4-methyl-2-((E)-((2-(((E)-thiophen-2-ylmethylene)amino)phenyl)imino)methyl)-benzenethiol] (C19H16N2S2), M = Cu(II), Ni(II), Co(II), and Zn(II). Quantum chemical calculations were used to supplement the experimental investigations. The [Zn(TTSB)2] chelate with a small energy gap value ∆E (0.900 eV) is more reactive than all other chelates, acco

Гибридные композитные соединения с оксидами металлов: всеобъемлющий обзор синтеза и многофункциональных видов применения.

В ряде передовых технологий может использоваться разнообразное семейство композитных полимерных (CP) составов с особыми физико-химическими свойствами (MO x). В настоящем исследовании представлен всеобъемлющий обзор комплексных подходов к этим гибридным композитным материалам с уделением особого внимания синергической интеграции оксидов металлов с ХП в целях укрепления их структурной основы, а также их электрических и каталитических свойств. Изучается многофункциональное применение этих материалов, в частности в таких областях, как биомедицинское зондирование, энергосберегающие модули и техноло

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… Less conduction than metals. … Thick polymer films may make it harder to reach the metal sites, even though coating polymers on transition metal NPs can improve the intrinsic activity and electrode conductivity of metal nanoparticles. …

Growth of the metal-organic framework ZIF-67 on cellulosic substrates for triboelectric nanogenerators.

Metal-organic frameworks (MOFs) are porous crystalline materials with a metal ion coordinated to a ligand molecule. Recently, MOFs are being explored extensively for energy harvesting via triboelectrification. However, the majority of MOFs are brittle and hard to grow, thus leading to poor device stability and flexibility. Herein, the growth of ZIF-67 MOF is achieved on a cellulosic filter paper (CFP) and cotton fabric (CF) separately to use as the active layer in a TENG. The grown ZIF-67 MOFs were used for the fabrication of CFP-TENG and CF-TENG in vertical contact separation mode. The CF-TEN

Honey varieties vs metal and pesticide content - literature review and own research.

INTRODUCTION AND OBJECTIVE: Although monofloral honeys are regarded as more valuable than multifloral types, they lack a clear uniform definition in European countries concerning the proportions of predominant pollen types. In addition, honey contains various secondary plant metabolites, enzymes and co-enzymes, which provide health-promoting properties; however, it can also accumulate heavy metals and pesticide residues. REVIEW METHODS: A literature review was performed using the databases PubMed, Google Scholar concerning the content of metals in the soil, flower and bee pollen in varietal h…

Transformative metal-ligand nanocoating for dual antibacterial and antithrombotic functionality in hemodialysis catheters.

Hemodialysis catheters are life-saving for end-stage renal disease patients but suffer from catheter-related bloodstream infections and thrombosis, which impair device function and threaten patient survival. Although functional coatings have been employed to mitigate some of these complications, the development of coatings that simultaneously exhibit both antibacterial and antithrombotic properties remains a significant challenge. To address these issues, we developed a PDA/Hep/Cu nanocomposite coating through sequential metal-ligand coordination, polymerization, and covalent immobilization. B

Metal-phenolic networks immobilized on Zein nanoparticles as an emerging photothermal sterilization for foods.

Bacterial-mediated food spoilage poses global challenges to food safety and waste. While biocompatible metal-phenolic network (MPN)-based photothermal platforms offer a promising alternative to conventional high-temperature sterilization, their pH-responsive disassembly significantly compromises effectiveness in acidic foods. To address this challenge, we developed a photothermal antibacterial nanoplatform composing of all-natural materials by covalently immobilizing epigallocatechin gallate (EGCG)/Fe3+ networks onto zein nanoparticles (ZEF). This design ensures pH-stable photothermal performa

A trace metal cleaning protocol for laboratory equipment to enhance the repeatability of methanotroph cultures.

Microbial metabolism relies on metal-dependent enzymes, making trace metal contamination in liquid cultures a critical factor in biotechnolo … atment combining ultrapure water with an acid wash and sonication steps was applied to remove trace metals from labware and culture vessels.•Based on a series of batch cultures, the efficiency of the "trace metal free" protocol treatment was demonstrated by the improvement in repeatability of both growth on methane and formate yield (Y formate/methane) p …

Implications of non-native metal substitution in carbonic anhydrase - engineered enzymes and models.

The enzyme carbonic anhydrase has been intensely studied over decades as a means to understand the role of zinc in hydrating CO2. The natura … bonic anhydrase enzymes. Furthermore, the effects of zinc-substitution by other relevant transition metals in both the naturally occurring enzymes and model systems has been reported. It has been observed that some other transition metal ions in the active site of carbonic anhydrase and its models can also accomplish similar activity, established by vari …

Advances in chemistry of CALF-20, a metal-organic framework for industrial gas applications.

The metal-organic framework CALF-20 is a super-stable adsorbent utilised for carbon dioxide capture and storage in cement plants. Furthermore, recent findings suggest its potential for various gas-related applications. In this brief review, we summarise ten years of research on CALF-20, emphasising its historical background and key findings. We discuss its flexibility, stability, processability, and tunability, detailing how these properties contribute to advancements in CALF-20 chemistry. We believe that this information will provide a better understanding of CALF-20 and assist in evaluating

Architecting Metal-Organic Frameworks at Molecular Level toward Direct Air Capture.

Escalating carbon dioxide (CO2) emissions have intensified the greenhouse effect, posing a significant long-term threat to environmental sustainability. Direct air capture (DAC) has emerged as a promising approach to achieving a net-zero carbon future, which offers several practical advantages, such as independence from specific CO2 emission sources, economic feasibility, flexible deployment, and minimal risk of CO2 leakage. The design and optimization of DAC sorbents are crucial for accelerating industrial adoption. Metal-organic frameworks (MOFs), with high structural order and tunable pore

Associations between plasma and urinary heavy metal concentrations and the risk of prostate cancer.

Prostate cancer is a leading cause of morbidity and mortality worldwide, with incidence rates projected to double between 2020 and 2040. This growing health challenge highlights the need for improved diagnostic strategies and risk assessment tools to better understand disease etiology and progression. Among environmental factors, heavy metals have been implicated in inflammation and carcinogenesis, yet their specific role in prostate disease remains insufficiently explored. This novel study analyses the relationship between heavy metal concentrations in plasma and urine of patients with benign…

Electroactive taxa stabilise a metal overdosed syntrophic propionate oxidising methanogenic consortia.

Propionate oxidation is a critical yet rate-limiting step in anaerobic digestion (AD), vulnerable to disruption by metal toxicity. Electroactive bacteria facilitating extracellular electron transfer (EET) may mitigate such toxicities; yet mechanisms remain unclear. This study hypothesized that ethanol feed electroactive taxa mitigate continuous metal overdosing stress by augmenting propionate oxidation and methanogenesis. Duplicate expanded granular sludge bed (EGSB) reactors were operated under two regimes (i) propionate enrichment (PE) or, (ii) with propionate plus ethanol enrichment (EE). A

Infrared-Light-Driven CO2 Reduction Realized by a Charge-Asymmetrical Metallic Conductor.

Until now, there has been a paradox in the utilization of infrared (IR) light, which carries a significant amount of solar energy (around 50% of the spectrum), for carbon dioxide (CO2) photoreduction. Given this, we propose a metallic conductor with charge-asymmetrical active sites, which realizes IR-driven CO2 reduction into C2 fuels using water as the reducing agent. Taking the CuInS2 nanosheets as an example, their metallic nature is verified by valence-band X-ray photoelectron spectroscopy and theoretical calculations, which enable IR light absorption. Their charge-asymmetrical active site

Edge-Functionalized Metal-Free Polyphthalocyanine Networks for Efficient Photocatalytic H2O2 Production.

Hydrogen peroxide (H2O2) is a green oxidant with wide applications, but its industrial production via the anthraquinone process is energy-intensive and environmentally harmful. Photocatalytic H2O2 generation from water and oxygen under visible light offers a sustainable alternative, although current systems suffer from poor light absorption and fast charge recombination. Here, we report a molecular engineering strategy to enhance the photocatalytic H2O2 generation of phthalocyanine-based covalent polymers (PPc) by introducing naphthyl groups at the polymer edge. The resulting PPc-n shows a 2.7

Discovery of triazole derivatives for biofilm disruption, anti-inflammation and metal ion chelation.

In the face of bacterial hazards to human health and resistance to multiple antibiotics, there is an urgent need to develop new antibiotics … emoval capacity showed that the synthesised triazole derivatives have high capacity to remove heavy metals Pb2+, Cd2+, Ca2+, Mg2+, Fe3+,Cr3+ and Al3+ in the range of 42%-60%.

Heteroatomic Sites on Carbon: Thermal CO2 Activation and Transformation by Metal-Free Catalysis.

Due to high thermal stability, the selective cleavage of the CO bond in CO2, catalyzed by heterogeneous catalysts, is quite challenging, especially in thermal catalytic areas. For the first time, metal-free active sites for thermal CO2 activation and transformation are constructed on the nanocarbon surface in this work. The potential H-assisted cleavage of the activated CO bond to produce CO on the metal-free catalyst is predicted and further confirmed by its reduction using silane as a hydrogen resource. With in situ infrared spectroscopy and theoretical calculations, the evolution process

Confinement-Driven Aggregate Formation of Photoacids within Porous Metal-Organic Frameworks.

Structurally driven properties of hybrid materials are a fascinating feature of metal-organic framework (MOF) materials that can serve as hosts for various responsive dye molecules. In particular, the formation of aggregates and the related shift of the emission of fluorophors can be tuned as a function of pore confinement. In this work, the fluorosolvatochromic methylated photoacid tris(2,2,2-trifluoroethyl) 8-methoxypyrene-1,3,6-trisulfonate (MePhos) and the free photoacid tris(2,2,2-trifluoroethyl) 8-hydroxypyrene-1,3,6-trisulfonate (Phos) were inserted into various MOF scaffolds, and the r

Nano CrGeTe3: Topological Hall Effect in the Metallic State under High Pressure.

INTRODUCTION: Mammalian bites are usually caused by dogs, cats, or humans, and are more prevalent in children (especially boys) than in adults. Animal bites are usually caused by the person's pet and, in children, frequently involve the face. Human bites tend to occur in children as a result of playing or fighting, while in adults they are usually the result of physical or sexual abuse. Mixed aerobe and anaerobe infection is the most common type of infection, and can occur in up to half of human bites. METHODS AND OUTCOMES: We conducted a systematic review and aimed to answer the following cl

Purification of vegetable oils from acrylamide pollutants using metal-organic frameworks.

Acrylamide is a chemical compound that can form in certain foods during high-temperature cooking processes like frying, roasting, and baking. The presence of acrylamide in used cooking oil has environmental impact; therefore, the purification of used oils may reduce the environmental risks. Nowadays, biochar, a porous carbonaceous material derived from biomass pyrolysis can added to crystalline porous materials called metal-organic framework (MOF), these combination lead to fantastic properties for adsorption of contaminants. Here, ZIF-8@Biocharas adsorbents were synthesized for purification o