Bacteriostatic Effect of Extracts from 10 Kinds of Traditional Chinese Medicinal Materials and Garlic on Pectobacterium chrysanthemi

Pectobacterium chrysanthemi is one of the main pathogens of soft rot disease of Amorphophallus konjac.The bacteriostatic effect of extracts from 10 kinds of traditional Chinese medicine and garlic on Pectobacterium chrysanthemi was studied in this experiment.The results showed that the extracts of Coptis chinensis,garlic,Scutellaria baicalensis,Mume Fructus and Bupleurum had significant bacteriostatic effect.Among them,Coptis chinensis and garlic had the best bacteriostatic effect on Pectobacterium chrysanthemi,and the diameter of inhibition zone was 2.27 and 2.19 cm,respectively,followed by Scutellaria baicalensis,with the diameter of inhibition zone of 1.68 cm.The extracts of Coptis chinensis,Scutellaria baicalensis and garlic with good bacteriostatic effect were diluted by double dilution method,and the bacteriostatic effect was determined.The results showed that 2-fold dilution of Coptis chinensis and 2-fold and 4-fold dilution of Scutellaria baicalensis had significant bacteriostatic effect,but the bacteriostatic effect of garlic extract was not obvious after dilution.

Artificial photosynthesis bringing new vigor into plastic wastes

The accumulation of plastic wastes in landfills and the environment threatens our environment and public health,while leading to the loss of potential carbon resources.The urgent necessary lies in developing an energy-saving and environmentally benign approach to upgrade plastic into value-added chemicals.Artificial photosynthesis holds the ability to realize plastic upcycling by using endless solar energy under mild conditions,but remains in the initial stage for plastic upgrading.In this review,we aim to look critically at the photocatalytic conversion of plastic wastes from the perspective of resource reutilization.To begin with,we present the emerging conversion routes for plastic wastes and highlight the advantages of artificial photosynthesis for processing plastic wastes.By parsing photocatalytic plastic conversion process,we demonstrate the currently available routes for processing plastic,including plastic photodegradation,tandem decomposition of plastic and CO_(2) reduction,selective plastic oxidation,as well as photoreforming of plastic.This review concludes with a personal perspective for potential advances and emerging challenges in photocatalytic plastic conversion.

Central nervous system injury meets nanoceria:opportunities and challenges

Central nervous system(CNS)injury,induced by ischemic/hemorrhagic or traumatic damage,is one of the most common causes of death and long-term disability worldwide.Reactive oxygen and nitrogen species(RONS)resulting in oxidative/nitrosative stress play a critical role in the pathological cascade of molecular events after CNS injury.Therefore,by targeting RONS,antioxidant therapies have been intensively explored in previous studies.However,traditional antioxidants have achieved limited success thus far,and the development of new antioxidants to achieve highly effective RONS modulation in CNS injury still remains a great challenge.With the rapid development of nanotechnology,novel nanomaterials provided promising opportunities to address this challenge.Within these,nanoceria has gained much attention due to its regenerative and excellent RONS elimination capability.To promote its practical application,it is important to know what has been done and what has yet to be done.This review aims to present the opportunities and challenges of nanoceria in treating CNS injury.The physicochemical properties of nanoceria and its interaction with RONS are described.The applications of nanoceria for stroke and neurotrauma treatment are summarized.The possible directions for future application of nanoceria in CNS injury treatment are proposed.