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Direct air capture (DAC) has attracted increasing interest and investment over the past few years. There are a fast-growing number of companies that entered the field and demonstrated DAC carbon removal setups and potential. However, current DAC methods are still based on solid absorbents or alkali solutions approaches which have low capture efficiency and low energy efficiency. This highlight proposed a promising CO2 capture technology, an electric energy driven closed-loop system for the direct removal of CO2 from ambient air which are based on two individual technologies: Polyam-N-Cu hybrid system promoted CO2 capture with ocean as anthropogenic CO2 sink and a chloride-mediated electrochemical pH swing system to remove CO2 from oceanwater.

Abstract Background In addition to the widespread use of antibiotics in healthcare settings, the current COVID-19 pandemic has escalated the emergence of antibiotic resistance. Nosocomial infections among hospitalized patients is a leading site for such resistant microbial colonization due to prolonged use of invasive devices and antibiotics in therapies. Invasive medical devices, especially catheters, are prone to infections that could accelerate the development of resistant microbes. Often, catheters - particularly urinary catheters - are prone to high infection rates. Antibiotic-coated catheters can reduce infection rates and although commercially available, are limited in efficacy and choices. Methods Herein, a novel and facile method to fabricate PMDS-based biomaterial for the development of antimicrobial eluting catheters is presented. Silicone based organic polymer polydimethylsiloxane (PDMS) was used to prepare a biomaterial containing novel polymeric imidazolium antimicrobial compound. Results It was found that the PDMS-based biomaterials could eradicate microbial colonization even after 60 days in culture with continuous microbial challenge, be recycled over multiple uses, stored at room temperature for long-term usage and importantly is biocompatible. Conclusion The PDMS-based biomaterial displayed biocidal functionality on microbes of clinical origin, which form major threats in hospital acquired infections. Graphical Abstract

Calcium carbide (CaC2) is a sustainable source of acetylene which plays an important role in organic synthesis due to its active triple bonds and terminal protons. Solid CaC2 has several advantages over acetylene gas such as easy handling, convenient storage and transportation. The CaC2 is considered as a safer and more convenient source of acetylene. The chemistry of the CaC2 is not confined to its use as a source of acetylene and its applications are not limited to the known reactions of acetylene. With the CaC2 chemistry being actively developing recently, it may eventually lead to the development of new transformations of alkyne chemistry. Herein, this mini review is focused on the synthesis and application of the CaC2 in biomass transformations.

Direct air capture (DAC) has attracted increasing interest and investment over the past few years. There are a fast-growing number of companies that entered the field and demonstrated DAC carbon removal setups and potential. However, current DAC methods are still based on solid absorbents or alkali solutions approaches which have low capture efficiency and low energy efficiency. This highlight proposed a promising CO2 capture technology, an electric energy driven closed-loop system for the direct removal of CO2 from ambient air which are based on two individual technologies: Polyam-N-Cu hybrid system promoted CO2 capture with ocean as anthropogenic CO2 sink and a chloride-mediated electrochemical pH swing system to remove CO2 from oceanwater. [ABSTRACT FROM AUTHOR]

5-Hydroxymethylfurfural (HMF) has been known as a product from hexose dehydration for over 100 years and is considered to be one of the most promising platform molecules that can be converted into a variety of interesting chemicals. HMF, together with furfural and 2,5-furandicarboxylic acid (FDCA) are derivatives of furan compounds, which were listed as the top 10 value-added bio-based chemicals by the US Department of Energy. The great and increasing interest in the production of furan derivatives from biomass resources is due to the great potential of furan derivatives as feedstock for bulk chemicals and fuels. HMF can be synthesized by dehydration of all types of C6 carbohydrates, including monomeric and polymeric carbohydrates, such as fructose, glucose, sucrose, starch, inulin, cellulose, and raw biomass. Numerous improvements and milestones have been made in the dehydration process during the past 130 years. The big challenge for the process of HMF production is its suitability for industrial scale yet being cost efficient. This perspective article will review the HMF development timeline, focusing on the important events, landmark contributions, engineering and practical challenges of HMF production. [ABSTRACT FROM AUTHOR]