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Modulation of reactive species in peroxymonosulfate activation by photothermal effect: A case of MOF-derived ZnFe2O4/c

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SEPARATION AND PURIFIcATION TEcHNOLOGY 2023年第PartB期306卷

作者： Zhang, Ke Wei, Yajing cao, Hongyang Xin, Yue Wang, chuanyi Shaanxi Univ Sci & Technol Sch Environm Sci & Engn Xian 710021 Peoples R China

Tuning reactive oxygen species in peroxymonosulfate (PMS) activation by the structure of catalysts has been extensively studied. But in photocatalysis, the photothermal effect is lack of attention on the alteration of reactive species produced by PMS activation. In this work, ZnFe2O4/c photocatalyst with oxygen vacancy (ZFOv/ c) was synthesized via the calcination of bimetallic Zn/Fe-metal-organic framework. The photocatalytic per-formance of the catalyst had been studied under several conditions, and the experimental results demonstrated that the photocatalytic reaction rate constant of ZFOv/c photocatalyst without temperature control was 21.3 % higher than that under temperature control. Reactive species quenching experiments and electron paramagnetic resonance indicated that 1O2 and h+ are the primary reactive species without temperature control, while only 1O2 are the dominant reactive species under temperature control conditions. The possible activation site was speculated by in-situ Raman spectroscopy, XPS spectra and cycling experiment. This paper analyzes the reasons for photocatalysis to improve the degradation rate of pollutant from the perspective of the change of reactive species generated by photothermal effect on PMS activation, which may open up opportunities to explore the maximum utilization of sunlight in PMS activation.

关键词： Photocatalysis PMS Reactive species ZnFe2O4 c Degradation

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Identification and characterization of colletotrichum brevisporum and c. truncatum causing papaya anthracnose in the Philippines

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JOURNAL OF PHYTOPATHOLOGY 2021年第11-12期169卷 692-700页

作者： Laurel, Nino R. Magdalita, Pablito M. Dela cueva, Fe M. Univ Philippines Los Banos Coll Agr & Food Sci Inst Plant Breeding Los Banos 4031 Philippines Univ Philippines Los Banos Coll Agr & Food Sci Inst Crop Sci Los Banos Philippines

Papaya (carica papaya L.) fruits showing typical anthracnose lesions were collected from Los Banos, Laguna, Philippines. Infected fruits showed brown to black, sunken water-soaked lesions with salmon- and black-coloured acervuli. Fungal pathogens were isolated from the fruit samples, plated on potato dextrose agar (PDA) and purified for subsequent analyses. A total of six colletotrichum isolates were subjected to morphological assessment and were divided into two morphotypes (I and II). Morphotype I produced conidia which were hyaline, fusiform with obtuse ends, while Morphotype II produced conidia which were hyaline, falcate with pointy ends. For phylogenetic analysis, sequence analysis of the internal transcribed spacer (ITS) region, glyceraldehyde-3-phosphate dehydrogenase (GAPDH), actin (AcT) and chitin synthase-1 (cHS-1) was performed and resulted in two well-supported and distinct clades. All test isolates were pathogenic in the detached fruit assay, and the same isolates were successfully re-isolated from the symptomatic fruit samples, thereby fulfilling Koch's postulate. The results of the phylogenetic analysis, morphological assessment and pathogenicity testing confirmed the identity of the isolates as c. brevisporum and c. truncatum. To our knowledge, this is the first confirmed report of the two new species associated with papaya anthracnose in the Philippines.

关键词： anthracnose c brevisporum c truncatum papaya phylogenetic analysis

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Inhibition of mTOR decreases insoluble proteins burden by reducing translation in c. elegans

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BIOGERONTOLOGY 2021年第1期22卷 101-118页

作者： Yee, Zhuangli Lim, Shaun Hsien Yang Ng, Li Fang Gruber, Jan Natl Univ Singapore Yong Loo Lin Sch Med Dept Biochem Singapore Singapore Yale NUS Coll Div Sci Aging Res Lab Singapore Singapore

Aging animals accumulate insoluble proteins as a consequence of a decline of proteostatic maintenance with age. In caenorhabditis elegans, for instance, levels of detergent-insoluble proteins increase with age. In longer-lived strains of c. elegans, this accumulation occurs more slowly, implying a link to lifespan determination. We further explored this link and found that detergent-insoluble proteins accumulate more rapidly at higher temperatures, a condition where lifespan is short. We employed a c. elegans strain carrying a GFP transcriptional reporter under the control of a heat shock (hsp-16.2) promoter to investigate the dynamics of proteostatic failure in individual nematodes. We found that early, sporadic activation of hsp-16.2 was predictive of shorter remaining lifespan in individual nematodes. Exposure to rapamycin, resulting in reduced mTOR signaling, delayed spurious expression, extended lifespan, and delayed accumulation of insoluble proteins, suggesting that targets downstream of the mTOR pathway regulate the accumulation of insoluble proteins. We specifically explored ribosomal S6 kinase (rsks-1) as one such candidate and found that RNAi against rsks-1 also resulted in less age-dependent accumulation of insoluble proteins and extended lifespan. Our results demonstrate that inhibition of protein translation via reduced mTOR signaling resulted in slower accumulation of insoluble proteins, delayed proteostatic crisis, and extended lifespan in c. elegans.

关键词： Aging Insoluble proteins Heat shock protein c elegans mTOR Proteostasis

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Effect of carbon source and c/N ratio on microbial community and function in ex situ biofloc system with inoculation of nitrifiers and aerobic denitrifying bacteria

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AQUAcULTURE RESEARcH 2021年第9期52卷 4498-4511页

作者： Qiu, Ming Liao, Shaoan Wang, Bin Zeng, Jiaying Fang, Jinkun Wang, Anli Ye, Jianmin South China Normal Univ Coll Life Sci Guangzhou Peoples R China Key Lab Ecol & Environm Sci Guangdong Higher Educ Guangzhou Peoples R China Guangdong Prov Key Lab Hlth & Safe Aquaculture Guangzhou Peoples R China

To control the inorganic nitrogen and biofloc concentrations in the biofloc system, it is necessary to intensify the nitrogen removal by nitrification and denitrification. In this study, nitrifiers and aerobic denitrifying bacteria were inoculated into aquaculture wastewater, with 16.80 mg/L of nitrogen input per day after start-up, and by addition of glucose and citrate c/N to 9 and 12, without adding carbon source as control (c/N 6.17). The concentrations of inorganic nitrogen, total nitrogen and biofloc, and the diversity of the microbial community were investigated during the experimental period of 40 days. The results showed that 84.17-89.97% of nitrogen input was removed in all the treatments, residual nitrogen was higher in the glucose treatments. Lower inorganic nitrogen at a higher c/N ratio was obtained with the addition of the same carbon source due to more assimilation. Among all, the citrate treatment at c/N 12 obtained the best control in inorganic nitrogen concentrations and better in biofloc concentration owing to efficient dissimilation and assimilation. Moreover, from day 26 to day 40, the number of detected OTUs increased by 22.90-58.40% while the Shannon indices have not changed much in all the treatments. Ten of the top 15 genera were the typical denitrifying genera in each treatment, the total abundance of these decreased by 7.00% to 58.00% while that of Paracoccus, as one of the denitrifiers added, increased by 3.00% to 25.00%. This suggested that the addition of citrate at higher c/N could improve the denitrification function of biofloc system.

关键词： biofloc c N ratios carbon source denitrification microbial community structure

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Impact of different nitrogen amendments on the biodegradation of 14c-phenanthrene by endophytic fungal strains in liquid culture

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MIcROBIOLOGIcAL RESEARcH 2023年第0期266卷 000-000页

作者： Omoni, Victor T. Bankole, Paul O. Nwosu, Tobechukwu F. -X. Omovoh, chidinma A. Tennison- Ojo, Adesola Samson Semple, Kirk T. Univ Lancaster Lancaster Environm Ctr Lancaster LA1 4YQ England Fed Univ Agr Dept Microbiol Makurdi 2373 Nigeria Fed Univ Agr Coll Biosci Dept Pure & Appl Bot Abeokuta Nigeria

In this study, the biodegradation of phenanthrene was investigated in newly isolated endophytic fungal strains, Fusarium sp. (KTS01), Trichoderma harzianum (LAN03), Fusarium oxysporum (KTS02), Fusarium oxysporum (LAN04), and clonostachys rosea (KTS05). This was performed under different carbon:nitrogen ratios (10:1, 20:1, and 30:1) using different nitrogen sources (urea and malt extract and ammonium nitrate) over a 30 d incubation period in both static and agitated liquid media. The kinetics of polycyclic aromatic hydrocarbons (PAH) min-eralisation to cO2 (lag phases, fastest rates, and overall extents) were measured for all of the fungal strains and nutrient conditions using 14c-phenanthrene. All fungal strains were able to biodegrade 14c-phenanthrene to 14cO2 under the different nutrient amendments. However, 14c-phenanthrene mineralisation varied for most of the fungal strains in static and agitated culture conditions. Greater extents of mineralisation were found in fungal cultures (strains KTS05 and KTS01) with c:N ratio of 10:1 in both static and agitated conditions, while the fungal strains (KTS05 and LAN03) showed the greatest phenanthrene mineralisation after N source amendments, particularly with malt extract. In addition, the phenanthrene mineralisation increased with higher c:N ratios for clonostachys rosea (KTS05) only. consequently, the results reported here provide a promising potential for the endophytic fungal strains and the importance of nutrients amendments for the enhanced degradation of PAHs contaminated environments.

关键词： Endophytic fungi Spent brewery grains Phenanthrene Nitrogen sources c N ratio

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Gephyrin and cYP2c9 Genetic Polymorphisms in Patients with Pharmacoresistant Epilepsy

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PHARMAcOGENOMIcS & PERSONALIZED MEDIcINE 2021年 14卷 1133-1140页

作者： El-Tallawy, Hamdy N. Abuhamdah, Sawsan Nassar, Ahmed Y. Farghaly, Wafaa Ma Saleem, Tahia H. Atta, Sara A. Sayed, Ayat A. Tohamy, Amal M. Hassan, Mohammed H. Assiut Univ Fac Med Dept Neurol & Psychiat Assiut Egypt Al Ain Univ Coll Pharm Dept Pharmaceut Sci Abu Dhabi U Arab Emirates Univ Jordan Fac Pharm Dept Biopharmaceut & Clin Pharm Amman Jordan Assiut Univ Fac Med Dept Med Biochem Assiut Egypt South Valley Univ Fac Med Dept Med Biochem Qena 83523 Egypt

Purpose: Gephyrin (GPHN) is an essential protein in the regulation of inhibitory postsynaptic density and polymorphism in the corresponding gene may have a role in the development of pharmacoresistant epilepsy (PRE). For the first time, we aimed to evaluate the association of rs928553T/c variants with PRE susceptibility. Moreover, we have analyzed the genetic polymorphism affecting cYP2c9 "rs12782374G/A" in the same population to detect the effect of SNP on the drug-metabolizing ability of patients with PRE. Patients and Methods: This case-control study enrolled 100 patients (group A) and 100 healthy, age and sex-matched controls, unrelated to patients (group B). TaqManTM assays using real-time PcR were run for genotyping of rs928553T/c and rs12782374G/A in all participants. Results: GPHN T>c polymorphism revealed significant risk association with occurrence of PRE using dominant, recessive and codominant models as follows: TT vs (Tc+cc): OR 0.23, 95%cI: 0.13-0.43, P<0.001. In addition, (TT+Tc vs cc): OR 0.38, 95%cI: 0.18-0.77, P<0.001. Also, T vs c (OR 0.34, 95%cI: 0.22-0.51, P=<0.001). Similarly, cYP2c9 G>A polymorphism showed a significant increased risk of PRE (GG vs (GA+AA): OR 0.11, 95% cI: 0.05-0.23, P<0.001). Furthermore, (GG+GA vs AA): OR 0.18, 95%cI: 0.084-0.39, P<0.001. Also, G vs A (OR 0.24, 95%cI: 0.15-0.366, P=<0.001). conclusion: Mutation of both GPHN (rs928553) and cYP2c9 (rs1278237) genes may be implicated as a genetic mediators of resistance in patients with PRE.

关键词： pharmacoresistant epilepsy rs928553T c rs12782374G A real time-PcR

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Neuronal motifs reveal backbone structure and influential neurons of neural network in c. elegans

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JOURNAL OF cOMPLEX NETWORKS 2023年第3期11卷

作者： Liu, Jian Yuan, Ye Zhao, Peng Gu, Xiao Huo, Hong Li, Zhaoyu Fang, Tao Shanghai Jiao Tong Univ Dept Automat Shanghai 200240 Peoples R China Minist Educ Key Lab Syst Control & Informat Proc Shanghai 200240 Peoples R China Univ Shanghai Sci & Technol Inst Machine Intelligence Shanghai 200093 Peoples R China Univ Queensland Queensland Brain Inst Brisbane Qld 4072 Australia

Neural network elements such as motif, backbone and influential nodes play important roles in neural network computation. Increasing researches have been applying complex network methods in order to identify different essential structures within complex neural networks. However, the distinct properties of synapses that build the neural network are often neglected, such as the difference between chemical synapses and electrical synapses. By separating these distinct synapses, we can identify a novel repertoire of neural motifs and greatly expand neural motif families in neural systems. Based on the expanded motif families, we further propose a novel neural-motif-based algorithm to extract the backbone in the neural network. The backbone circuit we extracted from caenorhabditis elegans connectome controls an essential motor behaviour in c. elegans. Furthermore, we develop a novel neural-motif-based algorithm to identify influential neurons. compared with the influential neurons identified using existing methods, the neurons identified in this work provide more information in related to their functions. These methods have been successfully applied to identify a series of network features in c. elegans, providing a biologically interpretable way of exploring the structure of neural network.

关键词： motifs neural network backbone influential neuron c elegans neural motif

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用于c_(6)D_(6)测量系统的高精度权重函数计算方法研究

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原子能科学技术 2022年第S01期56卷 249-257页

作者：王金成任杰阮锡超鲍杰栾广源孙琪丁琰琰刘超中国原子能科学研究院核数据重点实验室北京102413

本文基于中国散裂中子源(cSNS)反角白光中子束线(Back-n)的c_(6)D_(6)测量系统,以重要核素^(209)Bi为研究对象,利用蒙特卡罗方法研究了样品厚度对权重函数求取精度的影响,并发展了求解c_(6)D_(6)探测器的点态权重函数技术。研究结果表明... 详细信息

本文基于中国散裂中子源(cSNS)反角白光中子束线(Back-n)的c_(6)D_(6)测量系统,以重要核素^(209)Bi为研究对象,利用蒙特卡罗方法研究了样品厚度对权重函数求取精度的影响,并发展了求解c_(6)D_(6)探测器的点态权重函数技术。研究结果表明,目前Back-n上的c_(6)D_(6)测量系统权重函数的系统不确定度会随实验样品厚度的增加而迅速增加,而本工作得到的点态权重函数的系统不确定度在样品厚度增大到6 mm时仍小于0.5%,有利于提高厚样品实验数据的精度。本工作为将来在Back-n上开展如;Bi等高原子序数、小截面核素的中子辐射俘获截面的实验测量奠定了技术基础。

关键词：中子辐射俘获截面 c D 探测器脉冲高度权重技术权重函数

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Partially reduced ceO2/c@cNT with high oxygen vacancy boosting phosphate adsorption as cDI anode

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SEPARATION AND PURIFIcATION TEcHNOLOGY 2023年第PartA期306卷

作者： Qian, Hengfeng Yang, Jianmao Hu, Bin Zhang, Boshuang Wang, Yiwen Liu, Jianyun Donghua Univ Coll Environm Sci & Engn Text Pollut Controlling Engn Ctr Minist Ecol & Environm Shanghai 201620 Peoples R China Donghua Univ Res Ctr Anal & Measurement Shanghai 201620 Peoples R China Shanghai Inst Pollut Control & Ecol Secur Shanghai 200092 Peoples R China

Phosphorus in water is the main inducement for eutrophication and deterioration of water quality. cerium oxide has excellent adsorption ability for phosphate, but its activity and conductivity need to be improved for capacitive deionization (cDI) application. Herein, a carbon nanotube (cNT)-twined ceO2/c composite was synthesized by in-situ growth of ce-BTc in cNT matrix followed by carbonization. The ultrafine ceO2 particles were uniformly dispersed in carbon matrix, improving the electrical conductivity and effective active sites. Via hydrazine reduction, the content of ce(III) and oxygen vacancy of the obtained ceO2/c-R@cNT were enhanced, boosting the activity of electrode for phosphate adsorption. As an anode, ceO2/c-R@cNT delivered the maximum phosphate removal capacity of 109.5 mg P/g. The adsorption performance was investigated by analyzing adsorption kinetics and adsorption isotherms. The corresponding adsorption mechanism was studied by pH analysis, X-ray photoelectron spectroscopy and Fourier transform infrared spectroscopy. The electrode showed high selectivity to phosphate adsorption, and the separation factor arrived at 8.7 in the mixture solution with the cl-/P concentration ratio of 15. In addition, ceO2/c-R@cNT retains the P adsorption capacity of 95 % in 30 cycles. The phosphate in actual water was totally removed with good repeatability, proving the high practicability for water treatment.

关键词： Selective phosphate removal capacitive deionization ce-MOF-derived ceO 2 c Oxygen vacancy

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Oxidation ablation resistance of ZrB2-HfB2-Sic-TaSi2 coating prepared on c/c composite surface

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SURFAcE & cOATINGS TEcHNOLOGY 2023年第1期466卷

作者： Wang, Yifan Liu, Yanbo Ma, Zhuang Zhu, Shizhen Liu, Ling Xie, Mingshao Zhang, Ze Wang, Ruiqiang Beijing Inst Technol Sch Mat Sci & Engn Beijing 100081 Peoples R China Natl Key Lab Sci & Technol Mat Shock & Impact Beijing 100081 Peoples R China Beijing Inst Technol Chongqing Innovat Ctr Chongqing 401120 Peoples R China

In order to improve the oxidation and ablative properties of c/c composites, ZrB2-Sic-HfB2-TaSi2 coating was prepared on the surface of c/c composites by atmospheric plasma spraying. By means of microstructure analysis and phase structure analysis, the difference of the spray powder before and after IPS treatment and the microstructure and oxidation ablation resistance of the coating were studied. The results show that the IPS treated powder has better fluidity and densification. In the coating, part of ZrB2 and HfB2 exist in the form of unmelted particles, another part exists in the form of intermediate solid solution (Zr, Hf)B2, and TaSi2 exists in the particle gap. The linear ablation rate and mass ablation rate of the coating are -1.513 x 10-4 mm/s and 2.842 x 10-4 g/ s, respectively, measured under the condition of oxygen acetylene heat flux of 1.8 MW/m2, 180 s were ablated. The coating has good ablative resistance, and TaSi2 can form dense Zr-Ta-O and Hf-Ta-O oxides with Zr and Hf elements. The Ta-Si-O glass phase can effectively seal the holes of the coating to prevent oxygen penetration. During the ablation process, the oxidation of (Zr,Hf)B2 also plays a certain role in the formation of densification zone on the coating surface.

关键词： Ultra -high temperature ceramic coating c c composites Atmospheric plasma spraying ZrB 2-Sic-HfB 2-TaSi 2 coating

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