Mapping the Late-Holocene Glacial Geomorphology and Glacier Surface Types in the Mt. Harajoriha, Central Tian Shan

Alpine glaciers in the central Tian Shan are an important indicator of climate change and also the freshwater tower for the transboundary countries in Central Asia. Knowledge about the glacier dynamics in the late Holocene, such as the Little Ice Age, and surface zones is still limited. In this study, two headwater basins, the Xiata and the Muzart basins, in the Harajoriha Mountain Range in northwestern China were selected to investigate the glacial landforms and glacier surface types using a combination of geomorphological mapping and remote sensing analysis. Several types of glacial landforms including glacial valleys, moraine complexes, moraine ridges, and trimlines were identified and manually digitized based on the 30 m Shuttle Radar Topography Mission (SRTM) digital elevation model, 10 m Sentinel-2 satellite imagery, and high-resolution images from Google Earth. In addition, an effective automated mapping algorithm was applied to the modern glaciers from a Landsat 8 scene using its optical and thermal bands to classify glacier facies, i.e. ice, snow, and slush zone, and supraglacial debris cover. Field trip to the forelands of the Aerqialeteer Glacier in the Xiata basin allowed detailed mapping of the proglacial environment and provided field checks for the mapping with GPS tracks and panoramic photos. Through this fused approach, the mapping results showed a combination of different sets of information connecting the glacier retreat since the late Holocene to contemporary glacier properties. They will be of particular value for future chronological reconstruction of past glacial events and for understanding how surface characteristics play a role in the heterogeneity of glacier responses to climate change.

绿色农业产业创新实践的持续之道——“外部环境-基层策略”视角下的案例研究

以往政策创新的研究大多聚焦于政策发明阶段,多元主体的互动关系以及利益结构如何影响政策执行及可持续发展的问题尚缺乏深入探讨。论文基于“外部环境-基层策略”的分析框架,探讨了一个创新的绿色农业产业项目从理念到实践并得以持续发展的两种机制:产业引领机制和压力应对机制,分析了地方政府如何运用多元策略建构起有利于绿色农业发展的外部环境条件。作为能动者的地方政府积极从宏观制度中选择有利于产业发展的要素,通过体制保障、产业政策、项目包装、品牌打造等一系列引领机制,形塑了产业发展的外部环境。进入产业创新后期,随着外部环境的动态演进,地方政府随之进行适应性调整以化解新兴产业领域的不确定性与多元风险,促使产业发展始终朝着政策预期目标演进,由此建构的压力应对机制是绿色农业产业得以持续落地的关键。

Reducing dielectric confinement effect in ionic covalent organic nanosheets to promote the visible-light-driven hydrogen evolution

Ultra-thin two-dimensional(2D)organic semiconductors are promising candidates for photocatalysts because of the short charge diffusion pathway and favorable exposure of active sites plus the versatile architecture.Nonetheless,the inherent dielectric confinement of 2D materials will induce a strong exciton effect hampering the charge separation.Herein,we demonstrated an effective way to reduce the dielectric confinement effect of 2D ionic covalent organic nanosheets(iCONs)by tailoring the functional group via molecular engineering.Three ultra-thin CONs with different functional groups and the same ionic moieties were synthesized through Schiff base condensation between ionic amino monomer triaminoguanidinium chloride(TG)and aldehyde linkers.The integration of the hydroxyl group was found to significantly increase the dielectric constant by enhancing the polarizability of ionic moieties,and thus reduced the dielectric confinement and the corresponding exciton binding energy(E_(b)).The champion hydroxyl-functional iCON exhibited promoted exciton dissociation and in turn a high photocatalytic hydrogen production rate under visible-light irradiation.This work provided insights into the rationalization of the dielectric confinement effect of low-dimensional photocatalysts.

Association between Adiponectin and Metabolic Syndrome in Older Adults from Major Cities of China

Objective To investigate the association between adiponectin and metabolic syndrome （MetS） and related diseases in older adults from major cities of China. Methods A total of 2 049 adults at the age of 60-96 years from18 major cities of China were enrolled in the study. Plasma adiponectin and insulin concentrations were measured. Insulin resistance was assessed by homeostasis model assessment of insulin resistance （HOMA-IR）. The definitions proposed by International Diabetes Federation （IDF） and American Heart Association/National Heart, Lung, and Blood/nstitute （AHA/NLHBI） were used to identify MetS. Results The adiponectin concentration increased with the advance of age and was higher in women than in men. The sex specific adiponectin concentration was inversely correlated with body mass index （BMI）, waist circumference, diastolic blood pressure, triglycerides, glucose and fasting blood insulin, and positively correlated with HDL-C （P〈0.001）. The adiponectin concentration decreased with increasing MetS components. Compared with the 4th sex-specific adiponectin quartile, the odds ratio （OR） for prevalent MetS-IDF and MetS-AHA/NLHBI in subjects of the 1st quartile group was 3.25 （95% CI： 2.24, 4.71） and 3.21 （95% CI： 2.26, 4.55）, respectively. The association was independent of age, sex, life-style factors, medication, family history of chronic diseases, BMI, and HOMA-IR, The OR for MetS was much higher than those of MetS components and its related diseases. Conclusion Adiponectin is strongly associated with MetS independent of insulin resistance and obesity in older adults from major cities in China. The adiponectin concentration is a useful predictor for the risk of MetS.

PTEN基因甲基化及其表达异常与胃癌的关系(英文)

Objective:To probe into the relationships between PTEN gene expression,the promoter methylation and gastric cancer and its clinical pathological specific features.Methods:We analyzed the PTEN gene promoter methylation and mRNA expression status in gastric cancer tissues and its adjacent normal tissues by methylation specific PCR(MSP) and reverse transcription-polymerase chain reaction(RT-PCR) techniques.Results:PTEN promoters in 48.2%(27/56) gastric cancer tissues and 3.6(2/56) adjacent normal tissues were methylated and the PTEN promoter methylation rate in carcinoma tissues was obviously higher(P < 0.05).Of the 2 cases where the adjacent gastric tissues were methylated,the gastric cancer tissues were both methylated.Of the 29 gastric cancers with lymph node metastasis,19 had their PTEN gene promoters methylated and the PTEN gene promoter methylation in cases with lymph node metastasis was obviously higher than that without lymph node metastasis(P < 0.05).RT-PCR result showed that no expression of PTEN mRNA existed in any of the methylated gastric cancer tissues.Conclusion:The expression loss of PTEN gene mRNA in gastric cancers is related to their promoter methylation and might be one of the reasons for the generation,development and metastasis of gastric cancers.

Key progresses of MOE key laboratory of macromolecular synthesis and functionalization in 2021

In 2021,The MOE Key Laboratory of Macromolecular Synthesis and Functionalization in Zhejiang University had achieved several important results.First,a series of versatile organoboron catalysts were synthesized for ring-opening(co)polymerizations.Second,a catalyst-free polycondensation mechanism was proposed for the production of polyesters with high molecular weights.Third,a co-assembly method that can fabricate films and coatings with controllable structures and properties on various substrates was demonstrated,providing a platform for the construction of novel surface coatings.Forth,facile methods for producing high-productivity poly(propylene carbonate)and semicrystalline polyester have been discovered.And linear non-conjugated polyesters exhibiting yellow-green clusteroluminescence were developed for the first time.Fifth,a supramolecular prodrug nano-assembly strategy has been developed for reactive nitrogen species potentiated chemotherapy.Sixth,a series of tough and stiff supramolecular hydrogels with shape memory properties have been used for information encryption.Seventh,reversible fusion and fission of wet-spun graphene oxide fibers has been successfully achieved.Eighth,three non-conjugated polypeptides were synthesized and the mechanism of clusteroluminescence was studied.Ninth,a series of conducting covalent organic frameworks with high electrical conductivity and carrier mobility have been used as high-performance chemiresistor,electrocatalyst,and organic field-effect transistor.Tenth,the exploration of non-fused electron acceptors,and their photostable mechanism are exemplified for developing high-performance,low-cost and eco-friendly polymer solar cells.Finally,gel-grown long-range ordering bulk-heterojunctions has achieved improved X-ray detector performance.

Discrimination of 11 Chinese Materia Medica from <i>Umbelliferae</i>by Electronic Nose

In this paper, electronic nose (E-nose) was used to discriminate the 11 Chinese Materia Medica (CMM) from Umbelliferae by the difference of their odors. The E-nose generated data were analyzed by discriminant function analysis (DFA) and the responses of 18 sensors of E-nose were evaluated by CA analysis. Results showed that a rapid evaluation of complex response of the samples could be obtained, in combination with DFA, SQC and the CA analysis of the E-nose was given better results in the recognition values of the odor of the 11 CMM. All the 11 CMM could be distinguished by E-nose coupled with DFA, sensor 2, 3, 4, 5, 11, 13 and 15 were found to be able to better discriminate between the CMM samples. The CMM from Umbelliferae produced from different areas and processed with different methods could be distinguished by the E-nose, too. The results of the similarity of fingerprints of the E-nose are fitted with the TCM records about the property (yaoxing), channel tropism (guijing), function and usage of the CMM. The E-nose is a technology that can reflect the holistic odor of a CMM and is relevant to the TCM doctor’s practical identification. The odor of CMM can be expressed by objective data instead of subjective sense by human nose. Based on the sensor`s intensity of E-nose, the fingerprint of a CMM can be established, too. Although the E-nose has so many advantages, only use E-nose technology is not enough to control the quality of a CMM. It must be combined with the other macroscopic discriminating technology, such as the E-tongue, the E-eye, to have a holistic evaluation of a CMM.

Progress of high-flux hemodialysis in clinical application, complications and treatment

Hemodialysis is the main method of clinical renal replacement therapy, and its effectiveness and safety have been widely confirmed. High-flux hemodialysis, as a constantly updating new mode in the field of blood purification, has effectively improved the efficiency of hemodialysis and reduced the incidence of hemodialysis complications. High-flux hemodialysis has been widely used in clinical practice, and mainly plays its role through adsorption, convection and dispersion. High-flux hemodialysis has some advantages not possessed by conventional hemodialysis, including protecting injured renal function, reducing the incidence of cardiovascular complications in hemodialysis patients, improving the patients' nutritional status, reducing the occurrence of renal osteopathy and delaying the occurrence time of dialysis-associated amyloidosis. However, high-flux hemodialysis also has some limitations, such as the elimination of drugs and nutrients, and the backfiltration caused by increased pressure on the dialysis membrane and dialysate side. In this review, the related progress of high-flux hemodialysis in clinical application, mechanism, complications and treatment are discussed in order to provide a reference for its more rational clinical use.

Marker gene excision in transgenic Brassica napus via Agrobacterium-mediated Cre/lox transient expression system

Oilseed rape(Brassica napus L.)is one of the most important oil crops in the world.However,study on marker-free transgene of B.napus for bio-safety purpose is limited in this allotetraploid crop.In order to advance marker gene excision research,a newly designed Cre/lox system combining crossing and auto-excision strategy was introduced into B.napus.The system consists of 2 sets of independent vectors including pC35 Spro::T7 RP carrying T7 RNA polymerase and pCT7 pro::Cre carrying T7 promoter respectively.After hybridization of 2 according types of transgenic B.napus,marker gene would be removed as T7 RNA polymerase facilitate T7 promoter to promote Cre gene expression.Totally 52 and 46 positive To transgenic lines of these 2 vectors were obtained after identification by PCR and test trip.T1 plants from 3 T0 positive pC35 Spro::T7 RP lines and 2 T0 positive pC35 Spro::T7 RP lines were identified as single copy according to segregation ratio and were chosen for crossing.However,expression of CP4 EPSPS(glyphosate resistance gene)and OXY(bromoxynil resistance gene)were not found in F1 progeny,which proved that the excision was not complete.The possible reasons for our limited success were investigated and detailed analyses were performed.Although this system is not applicable for generating transgenic B.napus free from selectable marker gene,it provided valuable experience and clue for further improvement of this technique.Many other advantages and further improvement will be progressed in future work.

NMR-based metabolomics pro!le analysis in understanding metabolic variations of Bra LTP1-overexpressing Brassica napus

BraLTP1 is an important member of lipid transfer protein family in Brassica napus.The aim of current study was to detect, classify and follow variations in metabolite profiling of B. napus with overexpression of BraLTP1. In this study, metabolic change in leaves of BraLTP1-overexpressing B. napus plants (BraLTP1-22) and negative control (BraLTP1-22N) was investigated using nuclear magnetic resonance (NMR). Statistical strategy of principle component analysis (PCA) was performed to identify related difference metabolites. PCA score plots indicated not only high reproducibility of various treatments, but also significant difference of metabolite levels between different treatments. PCA loading plots indicated main responsible metabolites and a total of 50 metabolites were quantitatively determined. A wide range of metabolites were detected due to BraLTP1 overexpression,including biosynthesis and metabolism of sugars, amino acids, ammoniums compounds and organic acids. Furthermore, concentrations of 17 amino acids were determined for other set of samples by amino acids component analysis assay. The link between metabolite variations and phenotype were also discussed in BraLTP1-overexpressing B. napus.This work will help to gain insight into BraLTP1 function in B. napus in metabolism.

Effects of non-procedural factors in Brassica napus genetic transformation

Rapeseed (Brassica napus) is the second largest oil crop in the world. However, transformation efficiency of rapeseed still needs to be improved. To evaluate non-procedural factors (e.g. explants, section of explant, marker genes and number of exogenous genes) effects on transformation efficiency, 6-day-old hypocotyl explants from in vitro grown seedlings were co-cultivated with Agrobacterium strain GV3101 harboring a binary vector using optimized transformation procedure. Results showed that normal maturing variety ‘Zhongshuang 6 (ZS6)’ had the highest overall capacity to produce rooted shoots among 5 common varieties and 6 early maturing varieties, with green callus induction rate 81.45% and shoot regeneration rate 21.66%. Early maturing variety 14M645 has relatively high regeneration rate (4.69%) and one of the shortest growth periods (107.54 d). Data showed that choosing neomycin phosphotransferase II gene (NPTII) as selectable marker led to the best transformation rate (17.38%). Selecting upper hypocotyl segments near cotyledon as explant provided the higest transformation efficiency, with regeneration rate of 25.59% when using NPTII as selectable marker and 22.19% for Bar. B. napus transformed with single gene showed higher transformation frequency than vectors with multiple genes,highlighting difficulty of multiple gene transformation. This work helped to further improve genetic transformation of B. napus by optimizing factors that impact transformation efficiency,and it would ultimately improve research in transgenic B. napus varieties with commercial potential.

LC-MS based secondary metabolic profile of BraLTP2 overexpressing Brassica napus

BraLTP2 is an important member of lipid transfer protein family, and its molecular biology function in Brassica napus(B. napus) had been explored by prerious study. However, affection of BraLTP2 on secondary metabolites is still not clear. In this study, we investigated difference of leaf secondary metabolite profiling between BraLTP2 overexpressing B. napus and wild type. Liquid chromatography tandem mass spectrometry(LC-MS) was utilized. Wide range of secondary metabolites was found in BraLTP2 overexpressing plants. A total of 100 secondary metabolites were determined, 42 of which had significant differences, including flavonoids, phenylpropanoids and phenolamides. These results were in accordance with significant increasing trichomes of overexpressing BraLTP2 plants, which might produce and store secondary metabolites. Partial least squares discriminant analysis(PLS-DA) was performed to identify difference of secondary metabolites. PLS-DA score plots showed high reproducibility of each treatment. Significant changes were found between transformed and wild type. Permutation test validates the reliability rigorously. Furthermore, overexpressing of BraLTP2 led to seed germination improvement during the first 48 h under oxidation stress. Increased oxidation resistance of transgenic B. napus was in accordance with the significant variations of phenylpropanoids, phenylpropanoids and phenolamides.

Purification and Molecular Identification of an Antifungal Peptide from the Hemolymph of Musca domestica （housefly）

Antibacterial and antifungal peptides found in houseflies （Musca domestica） in large number are indispensable components of its immune defense mechanism. In this study the anterior tip of the larvae of housefly was cut off with a pair of fine scissors and hemolymph was collected and exuded in an ice-cold test tube. From the hemolymph an antifungal substance was isolated by solid-phase extraction combined with reverse phase-high performance liquid chromotography （RP-HPLC） and named as Musca domestica antifungal peptide-1 （MAF-1）. Sodium dodecyl sulphate-polyacrylamide gel electrophoresis （SDS-PAGE） showed its molecular weight was 17 kDa. UV absorption spectra revealed that this antifungal substance possessed the characteristics of protein peptides. Analysis by fingerprint-identification and tandem mass spectrometry suggested MAF-I was an unknown protein. Edman degradation identified the sequence of 30 amino acids of its N-terminal which matched no peptide in the MASCOT search database, indicating MAF-1 was a novel insect antifungal peptide. Mass spectrometry showed the precise molecular weight of MAF-1 was 17203.384 Da. Its isoelectric point was acidic.

Catheterization via direct cannulation of superior vena cava for a hemodialysis patient with an original dysfunctional catheter on the left internal jugular vein

Establishing a long-term vascular access in patients exhibiting vascular access exhaustion is challenging. In this study, we reported a case of a direct catheterization in the superior vena cava of a hemodialysis patient with vascular access exhaustion and original dysfunctional catheter inserted via the left internal jugular vein. The direct catheterization was performed with cuffed tunnel catheter （CUFF） and guided by digital subtraction angiography （DSA） and multidetector computedtomography venography （MDCTV）. The DSA and MDCTV results revealed an occlusion in the right innominate vein and thromboses in the left innominate, right internal jugular, subclavian, and femoral veins. The distal end of the superior vena cava was localized clearly by the original CUFF under DSA. Directed at the distal end of the superior vena cava, a 0.5-cm secondary puncture was introduced below the lateral head of the sternocleidomastoid muscle via the right neck area. This study is one of the few reports regarding direct catheterization of CUFF via the superior vena cava of a patient with vascular access exhaustion and CUFF dysfunction on the left internal jugular vein. We believe that our study can provide a new alternative for inserting central venous catheter for such patient.

Kidney fibrosis:from mechanisms to therapeutic medicines

Chronic kidney disease (CKD) is estimated to affect 10–14% of global population. Kidney fibrosis, characterized by excessiveextracellular matrix deposition leading to scarring, is a hallmark manifestation in different progressive CKD;However, at present noantifibrotic therapies against CKD exist. Kidney fibrosis is identified by tubule atrophy, interstitial chronic inflammation andfibrogenesis, glomerulosclerosis, and vascular rarefaction. Fibrotic niche, where organ fibrosis initiates, is a complex interplaybetween injured parenchyma (like tubular cells) and multiple non-parenchymal cell lineages (immune and mesenchymal cells)located spatially within scarring areas. Although the mechanisms of kidney fibrosis are complicated due to the kinds of cellsinvolved, with the help of single-cell technology, many key questions have been explored, such as what kind of renal tubules areprofibrotic, where myofibroblasts originate, which immune cells are involved, and how cells communicate with each other. Inaddition, genetics and epigenetics are deeper mechanisms that regulate kidney fibrosis. And the reversible nature of epigeneticchanges including DNA methylation, RNA interference, and chromatin remodeling, gives an opportunity to stop or reverse kidneyfibrosis by therapeutic strategies. More marketed (e.g., RAS blockage, SGLT2 inhibitors) have been developed to delay CKDprogression in recent years. Furthermore, a better understanding of renal fibrosis is also favored to discover biomarkers of fibroticinjury. In the review, we update recent advances in the mechanism of renal fibrosis and summarize novel biomarkers andantifibrotic treatment for CKD.

High cut-off membranes in patients requiring renal replacement therapy:a systematic review and meta-analysis

Background:Whether high cut-off(HCO)membranes are more effective than high-flux(HF)membranes in patients requiring renal replacement therapy(RRT)remains controversial.The aim of this systematic review was to investigate the efficacy of HCO membranes regarding the clearance of inflammation-related mediators,β2-microglobulin and urea;albumin loss;and all-cause mortality in patients requiring RRT.Methods:We searched all relevant studies on PubMed,Embase,Web of Science,the Cochrane Library,and China National Knowledge Infrastructure,with no language or publication year restrictions.Two reviewers independently selected studies and extracted data using a prespecified extraction instrument.Only randomized controlled trials(RCTs)were included.Summary estimates of standardized mean differences(SMDs)or weighted mean differences(WMDs)and risk ratios(RRs)were obtained by fixed-effects or random-effects models.Sensitivity analyses and subgroup analyses were performed to determine the source of heterogeneity.Results:Nineteen RCTs involving 710 participants were included in this systematic review.Compared with HF membranes,HCO membranes were more effective in reducing the plasma level of interleukin-6(IL-6)(SMD-0.25,95%confidence interval(CI)-0.48 to-0.01,P=0.04,I 2=63.8%);however,no difference was observed in the clearance of tumor necrosis factor-α(TNF-α)(SMD 0.03,95%CI-0.27 to 0.33,P=0.84,I 2=4.3%),IL-10(SMD 0.22,95%CI-0.12 to 0.55,P=0.21,I 2=0.0%),or urea(WMD-0.27,95%CI-2.77 to 2.23,P=0.83,I 2=19.6%).In addition,a more significant reduction ratio ofβ2-microglobulin(WMD 14.8,95%CI 3.78 to 25.82,P=0.01,I 2=88.3%)and a more obvious loss of albumin(WMD-0.25,95%CI-0.35 to-0.16,P<0.01,I 2=40.8%)could be observed with the treatment of HCO membranes.For all-cause mortality,there was no difference between the two groups(risk ratio[RR]1.10,95%CI 0.87 to 1.40,P=0.43,I 2=0.0%).Conclusions:Compared with HF membranes,HCO membranes might have additional benefits on the clearance of IL-6 andβ2-microglobulin but not on TNF-α,IL-10,and urea.Albumin loss is more serious with the treatment of HCO membranes.There was no difference in all-cause mortality between HCO and HF membranes.Further larger high-quality RCTs are needed to strengthen the effects of HCO membranes.

In-situ polarization of covalent organic frameworks in seawater enables enhanced photocatalytic hydrogen evolution under visiblelight irradiation

Photocatalytic hydrogen(H_(2))production from seawater over a photocatalyst is of great significance for the utilization of the earth’s abundant seawater resources and the storage of inexhaustible solar energy with low-energy density.However,the designation of efficient photocatalytic systems by using seawater usually suffers from activation decline when replacing pure water with seawater.Herein,we synthesized threeβ-ketoenamine-linked covalent organic frameworks(COFs),demonstrating their promotion in the photocatalytic decomposition of seawater relative to pure water under visible-light irradiation.The target COFs were synthesized via a microwave assisted solvothermal method by using 1,3,5-triformylphloroglucinol(Tp)as the aldehyde monomer to react with diamino units with different numbers of benzene rings.By surveying the building blocks,the constructed COF with a high density ofβ-ketoenamine units exhibited the so far highest photocatalytic H_(2) evolution rate(41.3 mmol·g^(−1)·h^(−1))in seawater,about 1.66 times higher than that in pure water.Theβ-ketoenamine units allowed the in-situ polarization of the COF framework through the adsorption of metal salts when proceeding with the photocatalytic H_(2) production in seawater.This polarization effect significantly increases the dielectric constant of the organic semiconductor to lower exciton dissociation energy and thus enhances the charge separation and transfer to promote the H_(2) photoproduction in seawater.

Butyrate acts as a G-protein-coupled receptor ligand that prevents high glucose-induced amyloidogenesis in N2a cells through the protein kinase B/glycogen synthase kinase-3β pathway

To the Editor:Alzheimer’s disease(AD)and type 2 diabetes mellitus(T2DM)are major causes of morbidity and mortality in older individuals,and their epidemiological link generates substantial challenges for the management of these devastating diseases.Abnormal glucose metabolism,accompanied by inhibition of the protein kinase B(Akt)/glycogen synthase kinase-3b(GSK-3b)signaling pathway,is a key factor in amyloid precursor protein(APP)accumulation and amyloid b(Ab)formation in neuronal cells.[1-3]Therefore,activation of the Akt/GSK-3b pathway may be a promising target for AD treatment.

Orthosteric ligand selectivity and allosteric probe dependence at Hydroxycarboxylic acid receptor HCAR2

Hydroxycarboxylic acid receptor 2(HCAR2),a member of Class A G-protein-coupled receptor(GPCR)family,plays a pivotal role in anti-lipolytic and anti-inflammatory effects,establishing it as a significant therapeutic target for treating dyslipidemia and inflammatory diseases.

Epidemiological Evaluation of Bacillus cereus-Induced Foodborne Outbreaks — China, 2010–2020

Introduction:Bacillus cereus(B.cereus)is a common gram-positive bacterium that contaminates starch-rich food and can cause outbreaks of foodborne diseases.This study describes characteristics of outbreaks caused by B.cereus in China during 2010–2020 and explore the possible reasons for changes in the number of outbreaks over time.Results of this analysis can efficiently help guide and allocate public resources to prevent B.cereus caused foodborne diseases.Methods:Descriptive statistical methods were used to analysis the data on B.cereus outbreaks in China during this period.The data were identified,reported at all levels in China through National Foodborne Disease Outbreak Surveillance System.Results:From 2010 to 2020,a total of 419 foodborne outbreaks prompted by B.cereus were reported in China,leading to 7,892 cases,2,786 hospital admissions,and 5 fatalities.The bulk of the outbreaks were recorded in the summer,primarily between May and September.The most recurrent food vehicle was linked with rice or flour-based products,notably those made with rice or fried rice.School canteens bore the brunt of the B.cereus outbreaks.In multifactor outbreaks,food contamination was identified as the most common culprit;while in instances where only one factor contributed,improper storage was most frequently implicated.Conclusion:The prevalence of B.cereus outbreaks remained relatively consistent throughout the studied period.Understanding the types of foods,causative factors,and contributing elements leading to B.cereus outbreaks can help inform prevention strategies for foodborne illnesses.The majority of outbreaks were associated with rice-or flour-based foods in school canteens,suggesting contamination and improper storage during food preparation.Consequently,it is essential to prioritize continuous education for canteen staff on food safety,efficacious management,and proper practices.The implementation of comprehensive guidelines,encompassing multiple critical aspects,can potentially reduce the occurrence of B.cereus outbreaks.