Internal migration is highly valued due to its increasingly acknowledged potential for social and economic development. However, despite its significant contribution to the development of towns and cities, it has led ...Internal migration is highly valued due to its increasingly acknowledged potential for social and economic development. However, despite its significant contribution to the development of towns and cities, it has led to the deterioration of many ecosystems globally. Lake Bosomtwe, a natural Lake in Ghana and one of the six major meteoritic lakes in the world is affected by land cover changes caused by the rising effects of migration, population expansion, and urbanization, owing to the development of tourist facilities on the lakeshore. This study investigated land cover change trajectories using a post-classification comparison approach and identified the factors influencing alteration in the Lake Bosomtwe Basin. Using Landsat imagery, an integrated approach of remote sensing, geographical information systems (GIS), and statistical analysis was successfully employed to analyze the land cover change of the basin. The findings show that over the 17 years, the basin’s forest cover decreased significantly by 16.02%, indicating that population expansion significantly affects changes in land cover. Ultimately, this study will raise the awareness of stakeholders, decision-makers, policy-makers, government, and non-governmental agencies to evaluate land use development patterns, optimize land use structures, and provide a reference for the formulation of sustainable development policies to promote the sustainable development of the ecological environment.展开更多
Deciduous oaks(Quercus spp.)are distributed from subalpine to tropical regions in the northern hemi-sphere and have important roles as carbon sinks and in climate change mitigation.Determining variations in plant func...Deciduous oaks(Quercus spp.)are distributed from subalpine to tropical regions in the northern hemi-sphere and have important roles as carbon sinks and in climate change mitigation.Determining variations in plant functional traits at multiple biological levels and linking them to environmental variables across geographical ranges is important for forecasting range-shifts of broadly-distrib-uted species under climate change.We sampled leaves of five deciduous Quercus spp.covering approximately 20°of latitude(~21°N-41°N)and 20 longitude(~99°E-119°E)across China and measured 12 plant functional traits at different biological levels.The traits varied distinctively,either within each biological level or among different levels driven by climatic and edaphic variables.Traits at the organ level were significantly correlated with those at the cellular and tissue levels,while traits at the whole-plant level only correlated with those at the tissue level.The Quercus species responded to changing environments by regulating stomatal size,leaf thickness and the palisade mesophyll thickness to leaf thickness ratios with contrasting degree of effect to adjust the whole-plant functioning,i.e.,intrinsic water use efficiency(iWUE),carbon supply and nitrogen availability.The results suggest that these deciduous Quercus spp.will maintain vigour by increasing iWUE when subjected to large temperature changes and insufficient moisture,and by accu-mulating leaf non-structural carbohydrates under drought conditions.The findings provide new insights into the inher-ent variation and trait coordination of widely distributed tree species in the context of climate change.展开更多
With the increasing awareness of privacy protection and the improvement of relevant laws,federal learning has gradually become a new choice for cross-agency and cross-device machine learning.In order to solve the prob...With the increasing awareness of privacy protection and the improvement of relevant laws,federal learning has gradually become a new choice for cross-agency and cross-device machine learning.In order to solve the problems of privacy leakage,high computational overhead and high traffic in some federated learning schemes,this paper proposes amultiplicative double privacymask algorithm which is convenient for homomorphic addition aggregation.The combination of homomorphic encryption and secret sharing ensures that the server cannot compromise user privacy from the private gradient uploaded by the participants.At the same time,the proposed TQRR(Top-Q-Random-R)gradient selection algorithm is used to filter the gradient of encryption and upload efficiently,which reduces the computing overhead of 51.78%and the traffic of 64.87%on the premise of ensuring the accuracy of themodel,whichmakes the framework of privacy protection federated learning lighter to adapt to more miniaturized federated learning terminals.展开更多
Resource recycling science and engineering is a new interdisciplinary subject.In order to meet the needs of the development of the circular economy,it is highly necessary to improve students’innovative abilities and ...Resource recycling science and engineering is a new interdisciplinary subject.In order to meet the needs of the development of the circular economy,it is highly necessary to improve students’innovative abilities and practical skills.This paper analyzes the problems existing in the practical teaching of this major and puts forward some approaches to the construction of practical teaching of resource-based major from the aspects of content system construction of practical teaching of resource recycling major,deep cooperation between schools and enterprises,construction of dual-teacher teams,and integration teaching of industry-university-research competition.It has effectively improved the training quality of applied talents in the resource recycling major.展开更多
Nocturnal enuresis(NE)is a common disease in children,commonly known as bedwetting.The International Children's Continence Society(ICCS)defines intermittent urinary incontinence during nighttime sleep in children ...Nocturnal enuresis(NE)is a common disease in children,commonly known as bedwetting.The International Children's Continence Society(ICCS)defines intermittent urinary incontinence during nighttime sleep in children aged 5 and above as enuresis.Enuresis can be divided into two types:primary nocturnal enuresis(PNE)and secondary nocturnal enuresis(SNE).PNE refers to nocturnal urinary control ability that has never been achieved for more than 6 months in children aged 5 and above with enuresis;SNE refers to the recurrence of enuresis symptoms after a period of more than 6 months of continuous nocturnal urinary control ability.SNE is relatively rare in clinical practice and is often caused by sudden stress events or other diseases such as snoring.Its pathogenesis and treatment are different from PNE.PNE is a multifactorial disease related to genetics,and its pathogenesis is not fully understood.There are not many research and review articles on its pathogenesis.In recent years,there has been significant progress in the epidemiology and pathogenesis of PNE.The following is a summary.展开更多
Background: Colibacillosis caused by enterotoxigenic Escherichia coil (E. coil} results in economic losses in the poultry industry. Antibiotics are usually used to control colibacillosis, however, E. coli has varyin...Background: Colibacillosis caused by enterotoxigenic Escherichia coil (E. coil} results in economic losses in the poultry industry. Antibiotics are usually used to control colibacillosis, however, E. coli has varying degrees of resistance to different antibiotics. Therefore the use of probiotics is becoming accepted as an alternative to antibiotics. In this study, we evaluated the effects of Clostfidium butyricum (C. butyficum) on growth performance, immune response, intestinal barrier function, and digestive enzyme activity in broiler chickens challenged with Eschefichia coli (E. coil) K88. Methods: The chickens were randomly divided into four treatment groups for 28 days. Negative control treatment (NC) consisted of birds fed a basal diet without E. coil K88 challenge and positive control treatment (PC) consisted of birds fed a basal diet and challenged with E. coil K88. C. buO/ricum probiotic treatment (CB) consisted of birds fed a diet containing 2 x 107 cfu C. buO/ricum/kg of diet and challenged with E. coil K88. Colistin sulfate antibiotic treatment (CS) consisted of birds fed a diet containing 20 mg colistin sulfate/kg of diet and challenged with E. coil K88. Results: The body weight (BW) and average day gain (ADG) in the broilers of CB group were higher (P 〈 0.05) than the broilers in the PC group overall except the ADG in the 14-21 d post-challenge. The birds in CB treatment had higher (P 〈 0.05) concentration of tumor necrosis factor-a (TNF-a) at 3 and 7 d post-challenge, and higher (P 〈 0.05) concentration of interleukin-4 (IL-4) at 14 d post-challenge than those in the PC treatment group. The concentration of serum endotoxin in CB birds was lower (P 〈 0.05) at 21 d post-challenge, and the concentrations of serum diamine oxidase in CB birds were lower (P 〈 0.05) at 14 and 21 d post-challenge than in PC birds. Birds in CB treatment group had higher (P 〈 0.05) jejunum villi height than those in PC, NC, or CS treatment at 7, 14, and 21 d post-challenge. In comparison to PC birds, the CB birds had lower (P 〈 0.05) jejunum crypt depth during the whole experiment. The birds in CB or CS treatment group had higher (P 〈 0.05) activities of amylase and protease at 3, 7, and 14 d post-challenge, and higher (P 〈 0.05) activity of lipase at 3, 7 d post-challenge than PC birds.展开更多
Objective:To investigate the situation of anaplasmosis in Yiyuan county.Shandong Province. Methods:A total of 26 blood samples from febrile patients suspected of anaplasmosis,48 blood samples from healthy farmers,8 fr...Objective:To investigate the situation of anaplasmosis in Yiyuan county.Shandong Province. Methods:A total of 26 blood samples from febrile patients suspected of anaplasmosis,48 blood samples from healthy farmers,8 from dogs,and 10 from goats and 170 ticks were collected in the same area during 2005-2007,and detected by serological and molecular methods.Results: Eight confirmed cases and 6 probable cases were determined using serologic and molecular methods.The seroprevalence of Anaplasma phagocytophilum(A.phagocytophilum) was 26.7% in healthy cases.Nine out of 10 sheep samples and 7 out of 8 dog samples reacted positively to the A.phagocytophilum antigen.PCR amplification and sequencing of the 16SrRNA of,4. phagocytophilum gene showed that some samples from patients,goats and ticks were 100% identical.The seroprevalence of Rickettsia typhi was 22.9%,Orientia tsutsugamushi 6.3%, Rickettsia sibirica 27.1%,Coxiella burnetii 18.8%,Bartonella henselae 31.3%,and Borrelia burgdorferi 41.6%.Conclusions:It is important to make differential diagnosis of febrile patients and to apply treatment with specific antibiotics.It is needed to enforce essential prevention and control measures including tick control and to improve sanitation conditions.展开更多
Proteases are important molecules that are involved in many physiological and pathological processes of the human body,such as growth,apoptosis and metastasis cancer cells.They are potential targets in cancer diagnosi...Proteases are important molecules that are involved in many physiological and pathological processes of the human body,such as growth,apoptosis and metastasis cancer cells.They are potential targets in cancer diagnosis and biotherapy.In this study,we analyzed the salivary protease spectrum of patients with oral squamous cell carcinoma (OSCC),oral benign masses and chronic periodontitis,as well as that of health,using human protease array kits,enzyme-linked immunosorbent assay,western blot and immunofluorescence.The salivary protease spectrum was found to be associated with oral diseases.For example,the saliva of patients with OSCC contained increased numbers of proteases than those of other oral diseases and health.The levels of matrix metalloproteinase (MMP)-1,MMP-2,MMP-10,MMP-12,A disintegrin and metalloprotease (ADAM)9,A disintegrin and metalloprotease with thrombospondin type 13 motifs (ADAMST13),cathepsin V and kallikrein 5 in the saliva of patients with OSCC were significantly increased compared with those of other groups.Taking MMP-1,cathepsin V,kallikrein 5 and ADAM9 as biomarkers of OSCC,cutoff values were199,11.34,9.29 and 202.55 pg·mL?1,respectively.From the area under the curve,sensitivity and specificity,the combination of cathepsin V/kallikrein5/ADAM9 was an optimal biomarker for diagnosing OSCC.Thus,analysis of the salivary protease spectrum may be an innovative and cost-efficient approach to evaluating the health status of the oral cavity.Specifically,increases in cathepsin V,kallikrein 5 and ADAM9 may be useful biomarkers in the screening and diagnosis of OSCC.展开更多
Targeted genotyping is an extremely powerful approach for the detection of known genetic variations that are biologically or clinically important.However,for non-model organisms,large-scale target geno-typing in a cos...Targeted genotyping is an extremely powerful approach for the detection of known genetic variations that are biologically or clinically important.However,for non-model organisms,large-scale target geno-typing in a cost-effective manner remains a major challenge.To address this issue,we present an ultrahigh-multiplex,in-solution probe array-based high-throughput diverse marker genotyping(HD-Marker)approach that is capable of targeted genotyping of up to 86000 loci,with coverage of the whole gene repertoire,in what is a 27-fold and six-fold multiplex increase in comparison with the conventional Illumina GoldenGate and original HD-Marker assays,respectively.We perform extensive analyses of var-ious ultrahigh-multiplex levels of HD-Marker(30 k-plex,56 k-plex,and 86 k-plex)and show the power and excellent performance of the proposed method with an extremely high capture rate(about 96%)and genotyping accuracy(about 96%).With great advantages in terms of cost(as low as 0.0006 USD per geno-type)and high technical flexibility,HD-Marker is a highly efficient and powerful tool with broad appli-cation potential for genetic,ecological,and evolutionary studies of non-model organisms.展开更多
Avermectins are a new class of macrocyclic lactones derived from mycelia of the soil actinomycete, and are used as effective agricultural pesticides and antiparasitic agents. However, run-off from crops treated with a...Avermectins are a new class of macrocyclic lactones derived from mycelia of the soil actinomycete, and are used as effective agricultural pesticides and antiparasitic agents. However, run-off from crops treated with avermectins may contaminate various bodies of water, and accumulated to certain concentrations to impact the development of aquatic animals. Here, we tested the genotoxicity of three avermectins (abamectin, ABM; ivermectin, IVM; and emamectin benzoate, EMB) on Polypedates megacephalus tadpoles by the alkaline single-cell gel electrophoresis assay. Tadpoles were treated for 48 h in the laboratory with different concentrations of these three agents, 0.006, 0.012, 0.018, 0.024, 0.030 mg/L for ABM, 0.003, 0.006, 0.009, 0.012, 0.015 mg/L for IVM and 0.04, 0.06, 0.08, 0.10, 0.12 mg/L for EMB, and then measured their DNA damage by the Comet assay tail factor %. The concentrations of resulted in highly significant increases in DNA damage of the tadpoles were found above the concentration threshold of 0.012 mg/ L ABM, 0.003 mg/L IVM and 0.06 mg/L EMB and linear correlations between the intensity of DNA damage and the concentrations of these three avermectins. Our results showed clearly that avermectins caused dose dependent DNA damage on amphibian tadpoles, and there might be a control on the misuse of avermectins.展开更多
Elemental sulfur has been used as a traditional Chinese medicine to treat the late-onset hypogonadism and impotence without a clarified mechanism for many hundreds of years.In the present study,mice were received sulf...Elemental sulfur has been used as a traditional Chinese medicine to treat the late-onset hypogonadism and impotence without a clarified mechanism for many hundreds of years.In the present study,mice were received sulfur or distilled water for 35 days by daily intragastric gavage at a dose of 250 mg/kg body weight.Then,the serum testosterone level and genes associated with testicular testosterone biosynthesis(TTB)were detected.The gut microbiota was also analyzed by 16S rRNA gene sequencing.Serum testosterone level was significantly increased by 291.1%in sulfur-treated mice.The H2S levels in serum and feces were significantly increased.The expression of genes associated with TTB including StAR,p450c17,3β-HSD,and P450scc in testes were significantly upregulated by Sulfur and NaHS,suggesting that sulfur promotes TTB depending on H2S.In addition,sulfur increased the diversity of gut microbiota and the abundance of several bacteria associated with sulfur metabolism,including genus Prevotella,which might be positively associated with serum level of testosterone in boys.Five pathways including bile secretion,carotenoid biosynthesis,lipid biosynthesis proteins,propanoate metabolism,and biosynthesis of type II polyketide products,were identified to associate with sulfur.Together,our results suggested that sulfur upregulated testicular testosterone biosynthesis via H2S,which was associated with alteration of gut microbiota in mice.Our study highlights a mechanism for the treatment of late-onset hypogonadism and impotence by sulfur.展开更多
The immune response of a biomaterial determines its osteoinductive effect.Although the mechanisms by which some immune cells promote regeneration have been revealed,the biomaterial-induced immune response is a dynamic...The immune response of a biomaterial determines its osteoinductive effect.Although the mechanisms by which some immune cells promote regeneration have been revealed,the biomaterial-induced immune response is a dynamic process involving multiple cells.Currently,it is challenging to accurately regulate the innate and adaptive immune responses to promote osteoinduction in biomaterials.Herein,we investigated the roles of macrophages and dendritic cells(DCs)during the osteoinduction of biphasic calcium phosphate(BCP)scaffolds.We found that osteoinductive BCP directed M2 macrophage polarization and inhibited DC maturation,resulting in low T cell response and efficient osteogenesis.Accordingly,a dual-targeting nano-in-micro scaffold(BCP loaded with gold nanocage,BCP-GNC)was designed to regulate the immune responses of macrophages and DCs.Through a dual-wavelength photosensitive switch,BCP-GNC releases interleukin-4 in the early stage of osteoinduction to target M2 macrophages and then releases dexamethasone in the later stage to target immature DCs,creating a desirable inflammatory environment for osteogenesis.This study demonstrates that biomaterials developed to have specific regulatory capacities for immune cells can be used to control the early inflammatory responses of implanted materials and induce osteogenesis.展开更多
Paper mulberry (Broussonetia papyrifera) is one of multifunctional species in agroforestry systems as well as one of traditional forages in many countries of Asia. Fully expanded tender leaves of B. papyrifera wildly ...Paper mulberry (Broussonetia papyrifera) is one of multifunctional species in agroforestry systems as well as one of traditional forages in many countries of Asia. Fully expanded tender leaves of B. papyrifera wildly growing under two traffic densities (a high traffic loads bearing more than 1000 vehicles per hour, HT;and a relatively clear section with almost no traffic loads, NT) were collected for carbohydrates, amino acids and phytohormones analysis. Leaves exposed to traffic pollutants were revealed to have significant lower amounts of carbohydrates and total amino acids than those growing at relatively clear environment. The levels of abscisic acid in the leaves significantly increased, while gib-berellin acid, indoleaetic acid, and zeatin riboside in the leaves significantly decreased, with the traffic densities. The results indicated that the contents of carbohydrates, amino acids and phytohormones in the leaves of B. papyrifera could be adversely affected by traffic pollution. Variations of the leaf biochemistries of B. papyrifera exposed to traffic pollutants implied that B. papyrifera could physiologically regulate itself to adapt or resist traffic stress.展开更多
Based on wave interference,a methodology to realize the total transmission phenomenon of SH0 waves is proposed in this paper.After a systematical theoretical investigation,an exact frequency of a flat plate consisting...Based on wave interference,a methodology to realize the total transmission phenomenon of SH0 waves is proposed in this paper.After a systematical theoretical investigation,an exact frequency of a flat plate consisting of another medium with finite length,is obtained,which is furthermore exemplified by the finite element method.This frequency is the same as the classical Fabry-Perot condition and dependent on the thickness of the material.It has been revealed that an SH0 wave,with its wavelength equal to twice of the length of another medium,can totally transmit across the medium without reflection.Especially when the impedance changes in a specific range,the energy of transmitted waves can keep in a high level,which is frequency-independent.Not limited by a flat plate,the Fabry-Perot condition is also suitable for a scraggy plate when the thickness variation is relatively small.Finally,using the transfer matrix method,the wave propagation in a plate with multiple layers is quantitatively investigated,and the frequency analysis for total transmission is carried out.The methodology,as well as the design scheme proposed,is achievable and artificially controllable,which opens a new prospect for the wave control and final applications in aeronautics and astronautics.展开更多
Objective:We investigated the correlations between cyclin-dependent kinase 4/6(CDK4/6)levels and human papillomavirus(HPV)infection state in head and neck squamous cell cancer(HNSCC).The aim was to explore the potenti...Objective:We investigated the correlations between cyclin-dependent kinase 4/6(CDK4/6)levels and human papillomavirus(HPV)infection state in head and neck squamous cell cancer(HNSCC).The aim was to explore the potential value of CDK4/6 inhibitors in the treatment of HNSCC.Methods:Multiomic sequencing data for HNSCC were obtained from The Cancer Genome Atlas(TCGA),and the mRNA levels and copy number variations(CNVs)of CDK4 and CDK6 were strictly analyzed.Overall survival(OS)curves were produced using the Kaplan-Meier method,and survival differences between groups were assessed by the log-rank test.Next,gene set enrichment analysis(GSEA)was applied to interrogate CDK4/6-associated molecular pathways in HPV-positive(HPV+)and HPV-negative(HPV-)HNSCC.Last,lymphoid cell infiltrates in each type of HNSCC were explored,and the correlations between CDK4/6 expression and lymphoid infiltrates were explored by Tumor Immune Estimation Resource(TIMER)analysis.Results:Overexpression of either CDK6 or CDK4 was not a relevant factor for OS in HPV-HNSCC(CDK6:top 40%vs.bottom 40%,P=0.885;CDK4:top 40%vs.bottom 40%,P=0.267).In HPV+HNSCC,CDK6 but not CDK4 was a relevant factor for OS(CDK6:top 40%vs.bottom 40%,P=0.002;CDK4:top 40%vs.bottom 40%,P=0.452).GSEA found that overexpressed CDK6 in HPV+HNSCC inhibited pathways involved in the tumor immune response,suggesting its roles in antitumor immunity.TIMER analysis results revealed that CDK6 but not CDK4 accumulation was negatively correlated with the number of tumor-infiltrating lymphocytes specific for HPV+HNSCC,which led to tumor response suppression.Conclusions:CDK6,but not CDK4,is a poor prognostic marker specific in HPV+HNSCC patients.Overexpressed CDK6 might stimulate tumor progression by suppressing lymphocytes infiltration independent of its kinase activity.Only abrogating its kinase activity using current CDK4/6 inhibitors was not enough to block its tumor promotion function.展开更多
There was a mistake in affiliation a,the correct one should be“MOE Key Laboratory of Marine Genetics and Breeding and Sars-Fang Center,Ocean University of China,Qingdao 266003,China”as updated above;Affiliations c a...There was a mistake in affiliation a,the correct one should be“MOE Key Laboratory of Marine Genetics and Breeding and Sars-Fang Center,Ocean University of China,Qingdao 266003,China”as updated above;Affiliations c and d should be reversed:Affiliation c should be“Laboratory for Marine Fisheries Science and Food Production Processes,Pilot Qingdao National Laboratory for Marine Science and Technology,Qingdao 266237,China,”and the affiliation d should be“Laboratory of Tropical Marine Germplasm Resources and Breeding Engineering,Sanya Oceanographic Institution,Ocean University of China,Sanya 572000,China.”展开更多
With the advent of advanced sequencing technologies,non-coding RNAs(ncRNAs)are increasingly pivotal and play highly regulated roles in the modulation of diverse aspects of plant growth and stress response.This include...With the advent of advanced sequencing technologies,non-coding RNAs(ncRNAs)are increasingly pivotal and play highly regulated roles in the modulation of diverse aspects of plant growth and stress response.This includes a spectrum of ncRNA classes,ranging from small RNAs to long non-coding RNAs(lncRNAs).Notably,among these,lncRNAs emerge as significant and intricate components within the broader ncRNA regulatory networks.Here,we categorize ncRNAs based on their length and structure into small RNAs,medium-sized ncRNAs,lncRNAs,and circle RNAs.Furthermore,the review delves into the detailed biosynthesis and origin of these ncRNAs.Subsequently,we emphasize the diverse regulatory mechanisms employed by lncRNAs that are located at various gene regions of coding genes,embodying promoters,5’UTRs,introns,exons,and 3’UTR regions.Furthermore,we elucidate these regulatory modes through one or two concrete examples.Besides,lncRNAs have emerged as novel central components that participate in phase separation processes.Moreover,we illustrate the coordinated regulatory mechanisms among lncRNAs,miRNAs,and siRNAs with a particular emphasis on the central role of lncRNAs in serving as sponges,precursors,spliceosome,stabilization,scaffolds,or interaction factors to bridge interactions with other ncRNAs.The review also sheds light on the intriguing possibility that some ncRNAs may encode functional micropeptides.Therefore,the review underscores the emergent roles of ncRNAs as potent regulatory factors that significantly enrich the regulatory network governing plant growth,development,and responses to environmental stimuli.There are yet-to-be-discovered roles of ncRNAs waiting for us to explore.展开更多
文摘Internal migration is highly valued due to its increasingly acknowledged potential for social and economic development. However, despite its significant contribution to the development of towns and cities, it has led to the deterioration of many ecosystems globally. Lake Bosomtwe, a natural Lake in Ghana and one of the six major meteoritic lakes in the world is affected by land cover changes caused by the rising effects of migration, population expansion, and urbanization, owing to the development of tourist facilities on the lakeshore. This study investigated land cover change trajectories using a post-classification comparison approach and identified the factors influencing alteration in the Lake Bosomtwe Basin. Using Landsat imagery, an integrated approach of remote sensing, geographical information systems (GIS), and statistical analysis was successfully employed to analyze the land cover change of the basin. The findings show that over the 17 years, the basin’s forest cover decreased significantly by 16.02%, indicating that population expansion significantly affects changes in land cover. Ultimately, this study will raise the awareness of stakeholders, decision-makers, policy-makers, government, and non-governmental agencies to evaluate land use development patterns, optimize land use structures, and provide a reference for the formulation of sustainable development policies to promote the sustainable development of the ecological environment.
基金supported by the Key Area Research and Development Program of Guangdong Province(2022B1111230001)theScience and Technology Foundation of Guangxi Zhuang Autonomous Region(Guike AD23026080)+1 种基金the National Natural Science Founda tion of China(No.42071065)Natural Science Foundation of US(No.2021898).
文摘Deciduous oaks(Quercus spp.)are distributed from subalpine to tropical regions in the northern hemi-sphere and have important roles as carbon sinks and in climate change mitigation.Determining variations in plant functional traits at multiple biological levels and linking them to environmental variables across geographical ranges is important for forecasting range-shifts of broadly-distrib-uted species under climate change.We sampled leaves of five deciduous Quercus spp.covering approximately 20°of latitude(~21°N-41°N)and 20 longitude(~99°E-119°E)across China and measured 12 plant functional traits at different biological levels.The traits varied distinctively,either within each biological level or among different levels driven by climatic and edaphic variables.Traits at the organ level were significantly correlated with those at the cellular and tissue levels,while traits at the whole-plant level only correlated with those at the tissue level.The Quercus species responded to changing environments by regulating stomatal size,leaf thickness and the palisade mesophyll thickness to leaf thickness ratios with contrasting degree of effect to adjust the whole-plant functioning,i.e.,intrinsic water use efficiency(iWUE),carbon supply and nitrogen availability.The results suggest that these deciduous Quercus spp.will maintain vigour by increasing iWUE when subjected to large temperature changes and insufficient moisture,and by accu-mulating leaf non-structural carbohydrates under drought conditions.The findings provide new insights into the inher-ent variation and trait coordination of widely distributed tree species in the context of climate change.
基金supported by the National Natural Science Foundation of China(Grant Nos.62172436,62102452)the National Key Research and Development Program of China(2023YFB3106100,2021YFB3100100)the Natural Science Foundation of Shaanxi Province(2023-JC-YB-584).
文摘With the increasing awareness of privacy protection and the improvement of relevant laws,federal learning has gradually become a new choice for cross-agency and cross-device machine learning.In order to solve the problems of privacy leakage,high computational overhead and high traffic in some federated learning schemes,this paper proposes amultiplicative double privacymask algorithm which is convenient for homomorphic addition aggregation.The combination of homomorphic encryption and secret sharing ensures that the server cannot compromise user privacy from the private gradient uploaded by the participants.At the same time,the proposed TQRR(Top-Q-Random-R)gradient selection algorithm is used to filter the gradient of encryption and upload efficiently,which reduces the computing overhead of 51.78%and the traffic of 64.87%on the premise of ensuring the accuracy of themodel,whichmakes the framework of privacy protection federated learning lighter to adapt to more miniaturized federated learning terminals.
基金Shandong Province Undergraduate Teaching Reform Research Project(M2023241)Teaching and Research Project of Shandong Agricultural Engineering College(20XJNKY06,22XJKTY08,23XJSZZ01)+1 种基金Education and Scientific Research Planning Project of Shandong Provincial Education Development Promotion Association(JCHKT2024164)Jinan City School Integration Development Strategy Project(JNSX2023086)。
文摘Resource recycling science and engineering is a new interdisciplinary subject.In order to meet the needs of the development of the circular economy,it is highly necessary to improve students’innovative abilities and practical skills.This paper analyzes the problems existing in the practical teaching of this major and puts forward some approaches to the construction of practical teaching of resource-based major from the aspects of content system construction of practical teaching of resource recycling major,deep cooperation between schools and enterprises,construction of dual-teacher teams,and integration teaching of industry-university-research competition.It has effectively improved the training quality of applied talents in the resource recycling major.
文摘Nocturnal enuresis(NE)is a common disease in children,commonly known as bedwetting.The International Children's Continence Society(ICCS)defines intermittent urinary incontinence during nighttime sleep in children aged 5 and above as enuresis.Enuresis can be divided into two types:primary nocturnal enuresis(PNE)and secondary nocturnal enuresis(SNE).PNE refers to nocturnal urinary control ability that has never been achieved for more than 6 months in children aged 5 and above with enuresis;SNE refers to the recurrence of enuresis symptoms after a period of more than 6 months of continuous nocturnal urinary control ability.SNE is relatively rare in clinical practice and is often caused by sudden stress events or other diseases such as snoring.Its pathogenesis and treatment are different from PNE.PNE is a multifactorial disease related to genetics,and its pathogenesis is not fully understood.There are not many research and review articles on its pathogenesis.In recent years,there has been significant progress in the epidemiology and pathogenesis of PNE.The following is a summary.
基金supported by the International Cooperation Project of Zhejiang Province(No.2012C14031)Innovative Research Team Program of Zhejiang Province(No.2011R50025)
文摘Background: Colibacillosis caused by enterotoxigenic Escherichia coil (E. coil} results in economic losses in the poultry industry. Antibiotics are usually used to control colibacillosis, however, E. coli has varying degrees of resistance to different antibiotics. Therefore the use of probiotics is becoming accepted as an alternative to antibiotics. In this study, we evaluated the effects of Clostfidium butyricum (C. butyficum) on growth performance, immune response, intestinal barrier function, and digestive enzyme activity in broiler chickens challenged with Eschefichia coli (E. coil) K88. Methods: The chickens were randomly divided into four treatment groups for 28 days. Negative control treatment (NC) consisted of birds fed a basal diet without E. coil K88 challenge and positive control treatment (PC) consisted of birds fed a basal diet and challenged with E. coil K88. C. buO/ricum probiotic treatment (CB) consisted of birds fed a diet containing 2 x 107 cfu C. buO/ricum/kg of diet and challenged with E. coil K88. Colistin sulfate antibiotic treatment (CS) consisted of birds fed a diet containing 20 mg colistin sulfate/kg of diet and challenged with E. coil K88. Results: The body weight (BW) and average day gain (ADG) in the broilers of CB group were higher (P 〈 0.05) than the broilers in the PC group overall except the ADG in the 14-21 d post-challenge. The birds in CB treatment had higher (P 〈 0.05) concentration of tumor necrosis factor-a (TNF-a) at 3 and 7 d post-challenge, and higher (P 〈 0.05) concentration of interleukin-4 (IL-4) at 14 d post-challenge than those in the PC treatment group. The concentration of serum endotoxin in CB birds was lower (P 〈 0.05) at 21 d post-challenge, and the concentrations of serum diamine oxidase in CB birds were lower (P 〈 0.05) at 14 and 21 d post-challenge than in PC birds. Birds in CB treatment group had higher (P 〈 0.05) jejunum villi height than those in PC, NC, or CS treatment at 7, 14, and 21 d post-challenge. In comparison to PC birds, the CB birds had lower (P 〈 0.05) jejunum crypt depth during the whole experiment. The birds in CB or CS treatment group had higher (P 〈 0.05) activities of amylase and protease at 3, 7, and 14 d post-challenge, and higher (P 〈 0.05) activity of lipase at 3, 7 d post-challenge than PC birds.
基金supported by the National Basic Research Program of China(973 Program) 2010CB530200(2010CB530206)the National Natural Science Foundation of China(No.30771854)National Key Science and Technology Projects of China(Project No.2008ZX10004-008)
文摘Objective:To investigate the situation of anaplasmosis in Yiyuan county.Shandong Province. Methods:A total of 26 blood samples from febrile patients suspected of anaplasmosis,48 blood samples from healthy farmers,8 from dogs,and 10 from goats and 170 ticks were collected in the same area during 2005-2007,and detected by serological and molecular methods.Results: Eight confirmed cases and 6 probable cases were determined using serologic and molecular methods.The seroprevalence of Anaplasma phagocytophilum(A.phagocytophilum) was 26.7% in healthy cases.Nine out of 10 sheep samples and 7 out of 8 dog samples reacted positively to the A.phagocytophilum antigen.PCR amplification and sequencing of the 16SrRNA of,4. phagocytophilum gene showed that some samples from patients,goats and ticks were 100% identical.The seroprevalence of Rickettsia typhi was 22.9%,Orientia tsutsugamushi 6.3%, Rickettsia sibirica 27.1%,Coxiella burnetii 18.8%,Bartonella henselae 31.3%,and Borrelia burgdorferi 41.6%.Conclusions:It is important to make differential diagnosis of febrile patients and to apply treatment with specific antibiotics.It is needed to enforce essential prevention and control measures including tick control and to improve sanitation conditions.
基金the National Natural Science Foundation of China (No. 81372892,81621062, 81520108009)111 Project of MOE China (B14038)+1 种基金the Open Foundation (SKLOD201601, SKLOD2016OF01) from the State Key Laboratory of Oral Disease Sichuan University and for the financial supportSichuan Province Science and Technology Innovation Team Program (JCPT 2011–9)
文摘Proteases are important molecules that are involved in many physiological and pathological processes of the human body,such as growth,apoptosis and metastasis cancer cells.They are potential targets in cancer diagnosis and biotherapy.In this study,we analyzed the salivary protease spectrum of patients with oral squamous cell carcinoma (OSCC),oral benign masses and chronic periodontitis,as well as that of health,using human protease array kits,enzyme-linked immunosorbent assay,western blot and immunofluorescence.The salivary protease spectrum was found to be associated with oral diseases.For example,the saliva of patients with OSCC contained increased numbers of proteases than those of other oral diseases and health.The levels of matrix metalloproteinase (MMP)-1,MMP-2,MMP-10,MMP-12,A disintegrin and metalloprotease (ADAM)9,A disintegrin and metalloprotease with thrombospondin type 13 motifs (ADAMST13),cathepsin V and kallikrein 5 in the saliva of patients with OSCC were significantly increased compared with those of other groups.Taking MMP-1,cathepsin V,kallikrein 5 and ADAM9 as biomarkers of OSCC,cutoff values were199,11.34,9.29 and 202.55 pg·mL?1,respectively.From the area under the curve,sensitivity and specificity,the combination of cathepsin V/kallikrein5/ADAM9 was an optimal biomarker for diagnosing OSCC.Thus,analysis of the salivary protease spectrum may be an innovative and cost-efficient approach to evaluating the health status of the oral cavity.Specifically,increases in cathepsin V,kallikrein 5 and ADAM9 may be useful biomarkers in the screening and diagnosis of OSCC.
基金the grant support from National Natural Science Foundation of China (32130107, 32002446 and 32102778)Project of Sanya Yazhouwan Science and Technology City Management Foundation (SKJC-KJ-2019KY01)+1 种基金China Agriculture Research System of MOF and MARATaishan Scholar Project Fund of Shandong Province of China
文摘Targeted genotyping is an extremely powerful approach for the detection of known genetic variations that are biologically or clinically important.However,for non-model organisms,large-scale target geno-typing in a cost-effective manner remains a major challenge.To address this issue,we present an ultrahigh-multiplex,in-solution probe array-based high-throughput diverse marker genotyping(HD-Marker)approach that is capable of targeted genotyping of up to 86000 loci,with coverage of the whole gene repertoire,in what is a 27-fold and six-fold multiplex increase in comparison with the conventional Illumina GoldenGate and original HD-Marker assays,respectively.We perform extensive analyses of var-ious ultrahigh-multiplex levels of HD-Marker(30 k-plex,56 k-plex,and 86 k-plex)and show the power and excellent performance of the proposed method with an extremely high capture rate(about 96%)and genotyping accuracy(about 96%).With great advantages in terms of cost(as low as 0.0006 USD per geno-type)and high technical flexibility,HD-Marker is a highly efficient and powerful tool with broad appli-cation potential for genetic,ecological,and evolutionary studies of non-model organisms.
基金granted by the Natural Science Foundation of Fujian, China (2015J01124)
文摘Avermectins are a new class of macrocyclic lactones derived from mycelia of the soil actinomycete, and are used as effective agricultural pesticides and antiparasitic agents. However, run-off from crops treated with avermectins may contaminate various bodies of water, and accumulated to certain concentrations to impact the development of aquatic animals. Here, we tested the genotoxicity of three avermectins (abamectin, ABM; ivermectin, IVM; and emamectin benzoate, EMB) on Polypedates megacephalus tadpoles by the alkaline single-cell gel electrophoresis assay. Tadpoles were treated for 48 h in the laboratory with different concentrations of these three agents, 0.006, 0.012, 0.018, 0.024, 0.030 mg/L for ABM, 0.003, 0.006, 0.009, 0.012, 0.015 mg/L for IVM and 0.04, 0.06, 0.08, 0.10, 0.12 mg/L for EMB, and then measured their DNA damage by the Comet assay tail factor %. The concentrations of resulted in highly significant increases in DNA damage of the tadpoles were found above the concentration threshold of 0.012 mg/ L ABM, 0.003 mg/L IVM and 0.06 mg/L EMB and linear correlations between the intensity of DNA damage and the concentrations of these three avermectins. Our results showed clearly that avermectins caused dose dependent DNA damage on amphibian tadpoles, and there might be a control on the misuse of avermectins.
基金the National Natural Science Foundation of China(grant numbers 81571495,81971443)Innovation-Oriented Science and Technology Grant from NHC Key Laboratory of Reproduction Regulation(CX2017-7)Science and Technology Climbing Fund of SIPPR(PD2017-3).
文摘Elemental sulfur has been used as a traditional Chinese medicine to treat the late-onset hypogonadism and impotence without a clarified mechanism for many hundreds of years.In the present study,mice were received sulfur or distilled water for 35 days by daily intragastric gavage at a dose of 250 mg/kg body weight.Then,the serum testosterone level and genes associated with testicular testosterone biosynthesis(TTB)were detected.The gut microbiota was also analyzed by 16S rRNA gene sequencing.Serum testosterone level was significantly increased by 291.1%in sulfur-treated mice.The H2S levels in serum and feces were significantly increased.The expression of genes associated with TTB including StAR,p450c17,3β-HSD,and P450scc in testes were significantly upregulated by Sulfur and NaHS,suggesting that sulfur promotes TTB depending on H2S.In addition,sulfur increased the diversity of gut microbiota and the abundance of several bacteria associated with sulfur metabolism,including genus Prevotella,which might be positively associated with serum level of testosterone in boys.Five pathways including bile secretion,carotenoid biosynthesis,lipid biosynthesis proteins,propanoate metabolism,and biosynthesis of type II polyketide products,were identified to associate with sulfur.Together,our results suggested that sulfur upregulated testicular testosterone biosynthesis via H2S,which was associated with alteration of gut microbiota in mice.Our study highlights a mechanism for the treatment of late-onset hypogonadism and impotence by sulfur.
基金supported by the National Key R&D Program of China(2018YFC1105300)the National Natural Science Foundation of China(81771050,81700931,81901017)+1 种基金the Special Fund for Technical Innovation of Hubei Province(2017AHB046)the Natural Science Foundation of Hubei Province(2017CFA025).
文摘The immune response of a biomaterial determines its osteoinductive effect.Although the mechanisms by which some immune cells promote regeneration have been revealed,the biomaterial-induced immune response is a dynamic process involving multiple cells.Currently,it is challenging to accurately regulate the innate and adaptive immune responses to promote osteoinduction in biomaterials.Herein,we investigated the roles of macrophages and dendritic cells(DCs)during the osteoinduction of biphasic calcium phosphate(BCP)scaffolds.We found that osteoinductive BCP directed M2 macrophage polarization and inhibited DC maturation,resulting in low T cell response and efficient osteogenesis.Accordingly,a dual-targeting nano-in-micro scaffold(BCP loaded with gold nanocage,BCP-GNC)was designed to regulate the immune responses of macrophages and DCs.Through a dual-wavelength photosensitive switch,BCP-GNC releases interleukin-4 in the early stage of osteoinduction to target M2 macrophages and then releases dexamethasone in the later stage to target immature DCs,creating a desirable inflammatory environment for osteogenesis.This study demonstrates that biomaterials developed to have specific regulatory capacities for immune cells can be used to control the early inflammatory responses of implanted materials and induce osteogenesis.
文摘Paper mulberry (Broussonetia papyrifera) is one of multifunctional species in agroforestry systems as well as one of traditional forages in many countries of Asia. Fully expanded tender leaves of B. papyrifera wildly growing under two traffic densities (a high traffic loads bearing more than 1000 vehicles per hour, HT;and a relatively clear section with almost no traffic loads, NT) were collected for carbohydrates, amino acids and phytohormones analysis. Leaves exposed to traffic pollutants were revealed to have significant lower amounts of carbohydrates and total amino acids than those growing at relatively clear environment. The levels of abscisic acid in the leaves significantly increased, while gib-berellin acid, indoleaetic acid, and zeatin riboside in the leaves significantly decreased, with the traffic densities. The results indicated that the contents of carbohydrates, amino acids and phytohormones in the leaves of B. papyrifera could be adversely affected by traffic pollution. Variations of the leaf biochemistries of B. papyrifera exposed to traffic pollutants implied that B. papyrifera could physiologically regulate itself to adapt or resist traffic stress.
基金National Natural Science Foundation of China(Nos.51408481,51808439)Central University’s special research funding special fund cross-disciplinary project(xj2017174)Natural Science Foundation Research Program of Shaanxi Province-Youth Talents Project(2013JQ7003).
文摘Based on wave interference,a methodology to realize the total transmission phenomenon of SH0 waves is proposed in this paper.After a systematical theoretical investigation,an exact frequency of a flat plate consisting of another medium with finite length,is obtained,which is furthermore exemplified by the finite element method.This frequency is the same as the classical Fabry-Perot condition and dependent on the thickness of the material.It has been revealed that an SH0 wave,with its wavelength equal to twice of the length of another medium,can totally transmit across the medium without reflection.Especially when the impedance changes in a specific range,the energy of transmitted waves can keep in a high level,which is frequency-independent.Not limited by a flat plate,the Fabry-Perot condition is also suitable for a scraggy plate when the thickness variation is relatively small.Finally,using the transfer matrix method,the wave propagation in a plate with multiple layers is quantitatively investigated,and the frequency analysis for total transmission is carried out.The methodology,as well as the design scheme proposed,is achievable and artificially controllable,which opens a new prospect for the wave control and final applications in aeronautics and astronautics.
基金supported by the Beijing Municipal Science and Technology Commission (No. Z171100001017127)the Fund for National Natural Science Foundation of China (No. 81472186)
文摘Objective:We investigated the correlations between cyclin-dependent kinase 4/6(CDK4/6)levels and human papillomavirus(HPV)infection state in head and neck squamous cell cancer(HNSCC).The aim was to explore the potential value of CDK4/6 inhibitors in the treatment of HNSCC.Methods:Multiomic sequencing data for HNSCC were obtained from The Cancer Genome Atlas(TCGA),and the mRNA levels and copy number variations(CNVs)of CDK4 and CDK6 were strictly analyzed.Overall survival(OS)curves were produced using the Kaplan-Meier method,and survival differences between groups were assessed by the log-rank test.Next,gene set enrichment analysis(GSEA)was applied to interrogate CDK4/6-associated molecular pathways in HPV-positive(HPV+)and HPV-negative(HPV-)HNSCC.Last,lymphoid cell infiltrates in each type of HNSCC were explored,and the correlations between CDK4/6 expression and lymphoid infiltrates were explored by Tumor Immune Estimation Resource(TIMER)analysis.Results:Overexpression of either CDK6 or CDK4 was not a relevant factor for OS in HPV-HNSCC(CDK6:top 40%vs.bottom 40%,P=0.885;CDK4:top 40%vs.bottom 40%,P=0.267).In HPV+HNSCC,CDK6 but not CDK4 was a relevant factor for OS(CDK6:top 40%vs.bottom 40%,P=0.002;CDK4:top 40%vs.bottom 40%,P=0.452).GSEA found that overexpressed CDK6 in HPV+HNSCC inhibited pathways involved in the tumor immune response,suggesting its roles in antitumor immunity.TIMER analysis results revealed that CDK6 but not CDK4 accumulation was negatively correlated with the number of tumor-infiltrating lymphocytes specific for HPV+HNSCC,which led to tumor response suppression.Conclusions:CDK6,but not CDK4,is a poor prognostic marker specific in HPV+HNSCC patients.Overexpressed CDK6 might stimulate tumor progression by suppressing lymphocytes infiltration independent of its kinase activity.Only abrogating its kinase activity using current CDK4/6 inhibitors was not enough to block its tumor promotion function.
文摘There was a mistake in affiliation a,the correct one should be“MOE Key Laboratory of Marine Genetics and Breeding and Sars-Fang Center,Ocean University of China,Qingdao 266003,China”as updated above;Affiliations c and d should be reversed:Affiliation c should be“Laboratory for Marine Fisheries Science and Food Production Processes,Pilot Qingdao National Laboratory for Marine Science and Technology,Qingdao 266237,China,”and the affiliation d should be“Laboratory of Tropical Marine Germplasm Resources and Breeding Engineering,Sanya Oceanographic Institution,Ocean University of China,Sanya 572000,China.”
基金This review was supported by the National Key Research and Development Program of China(Grant No.2022YFD2100101)the National Natural Science Foundation of China to G.Z.(Grant No.32302623)+1 种基金the Joint NSFC-ISF Research Program(Grant No.32061143022)the National Natural Sciences Foundation of China(Grant No.32172639).
文摘With the advent of advanced sequencing technologies,non-coding RNAs(ncRNAs)are increasingly pivotal and play highly regulated roles in the modulation of diverse aspects of plant growth and stress response.This includes a spectrum of ncRNA classes,ranging from small RNAs to long non-coding RNAs(lncRNAs).Notably,among these,lncRNAs emerge as significant and intricate components within the broader ncRNA regulatory networks.Here,we categorize ncRNAs based on their length and structure into small RNAs,medium-sized ncRNAs,lncRNAs,and circle RNAs.Furthermore,the review delves into the detailed biosynthesis and origin of these ncRNAs.Subsequently,we emphasize the diverse regulatory mechanisms employed by lncRNAs that are located at various gene regions of coding genes,embodying promoters,5’UTRs,introns,exons,and 3’UTR regions.Furthermore,we elucidate these regulatory modes through one or two concrete examples.Besides,lncRNAs have emerged as novel central components that participate in phase separation processes.Moreover,we illustrate the coordinated regulatory mechanisms among lncRNAs,miRNAs,and siRNAs with a particular emphasis on the central role of lncRNAs in serving as sponges,precursors,spliceosome,stabilization,scaffolds,or interaction factors to bridge interactions with other ncRNAs.The review also sheds light on the intriguing possibility that some ncRNAs may encode functional micropeptides.Therefore,the review underscores the emergent roles of ncRNAs as potent regulatory factors that significantly enrich the regulatory network governing plant growth,development,and responses to environmental stimuli.There are yet-to-be-discovered roles of ncRNAs waiting for us to explore.