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Effects of Chlorine Dioxide Gas on Postharvest Physiology and Storage Quality of Green Bell Pepper (Capsicum frutescens ***)

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Agricultural Sciences in China 2007年第2期6卷 214-219页

作者： DU Jin-hua FU mao-run LI miao-miao XIA Wei College of Food Science and Engineering Shandong Agricultural University Taian 271018 P.R. China

The effects of treatment of chlorine dioxide （C1Oz） gas on postharvest physiology and preservation quality of green bell peppers were studied. Green bell peppers were collected in bags and treated with 0, 5, 10, 20, and 50 mg L^-1 ClO2 gas at 10±0.5℃ for over 40 d, and the changes in postharvest physiology and preservation quality of the peppers were evaluated during the storage. The inhibition of rot of the peppers was observed for all the tested ClO2 gas treatments. The rot rates of the treated samples were 50% lesser than those of the control after day 40 of storage. The highest inhibitory effect was obtained after 50 mg L^-1 ClO2 gas treatment, where the peppers did not decay until day 30 and showed only one-fourth of the rot rate of the control at day 40 of storage. The respiratory activity of the peppers was significantly （P〈0.05） inhibited by 20 and 50 mg L^-1 ClO2 treatments, whereas no significant effects on respiratory activity were observed with 5 and 10 mg L^-1 ClO2 treatments （P〉0.05）. Except for 50 mg L^-1 ClO2, malondialdenyde （MDA） contents in the peppers treated with 5, 10, or 20 mg L^-1 ClO2 were not significantly （P〉0.05） different from those in the control. Degradation of chlorophyll in the peppers was delayed by 5 mg L-1ClO2, but promoted by 10, 20, or 50 mg L^-1 ClO2. The vitamin C content, titratable acidity, and total soluble solids of the peppers treated by all the tested ClO2 gas did not significantly change during the storage. The results suggested that ClO2 gas treatment effectively delayed the postharvest physiological transformation of green peppers, inhibited decay and respiration, maintained some nutritional and sensory quality, and retarded MDA accumulation.

关键词： green bell pepper (Capsicum frutescens L. var. Longrum) chlorine dioxide gas post-harvest physiology,storage quality

Low Ca diet leads to increased Ca retention by changing the gut flora and ileal pH value in laying hens

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Animal Nutrition 2023年第2期13卷 270-281页

作者： Sha Jiang Xinyu Zou miao mao Mi Zhang Wenjun Tu Meilan Jin Joint International Research Laboratory of Animal Health and Animal Food Safety College of Veterinary MedicineSouthwest UniversityChongqing400715China Immunology Research Center Medical Research InstituteSouthwest UniversityChongqing402460China Laboratory Animal Center Southwest UniversityChongqing400715China

Osteoporosis is a common degenerative metabolic bone disease in caged laying *** egg production mobilizing large amounts of Ca from bone for eggshell formation,consequently leading to Ca deficiency,has been recognized as a critical factor causing osteoporosis in commercial laying *** aim of this study was to examine the effect of Ca deficiency on the function of the gut microbiotaebone axis and related egg production traits and bone health in laying ***-four 48-week-old laying hens were fed a control diet(Control,3.72%)or a low Ca diet(LC,2.04%)for 60 d(n=12).Compared to the Control hens,the LC hens had higher levels of alkaline phosphatase and tartrate resistant acid phosphatase(P<0.05)with lower bone strength,eggshell thickness,and eggshell strength(P<0.05).In addition,the LC hens had higher plasma estradiol concentrations,while having lower concentrations of interleukin-1(IL-1)and *** LC hens also had a lower pH value in the ileum with an increased Ca *** principal co-ordinates analysis showed significantly separate cecal microbiota populations between the Control and LC *** Prevotellaceae_UCG-001,Subdoligranulum,Peptococcus,and Eubacterium_hallii_group(P<0.05)were higher,while the CHKC1001 and Sutterella(P<0.05)were lower at the genus level in the LC *** addition,Prevotellaceae_UCG-001,Subdoligranulum and Eubacter-ium_hallii_group had a negative correlation,while Sutterella was positively correlated with ileal pH *** transcriptome analysis revealed that the low Ca diet caused 20 and 31 genes to be signifi-cantly up-and down-regulated,*** gene expressions of cystic fibrosis transmembrane conductance regulator,solute carrier family 26 member 3 of the anion exchangers,and mitogen-activated protein kinase 12 of pro-inflammatory factors were lower in the LC birds,which was corre-lated with the lower ileal pH *** results suggest that the hens with low Ca diet-induced osteoporosis have an incr

关键词： Low Ca diet Ca retention Microbiota Transcriptional profiling Hen

Effect of ground stress on hydraulic fracturing of methane well

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Journal of China University of Mining and Technology 2008年第2期18卷 204-209页

作者： DU Chun-zhi mao Xian-biao miao Xie-xing WANG Peng School of Sciences China University of Mining ＆ Technology Xuzhou Jiangsu 221008 China

Most of the coal reservoirs in China are of low-permeability, so hydraulic fracturing is widely used to improve the per- meability in the extraction of gas by ground drilling. The ground stress around the well was analyzed by using theory of elasticity. The pressure when the well fractured is formulated and the effect of ground stress on pressure is discussed. The effect of ground-stress-differences on hydraulic fracturing was analyzed by using the numerical software RFPA2D-Flow in reference to the tectonic stress in Jincheng coal area. The results show that: 1) the position where initial fracture appears is random and fracture branches emerge when the fractures expand if ground stresses in any two directions within a horizontal plane are equal; 2) other- wise, the fractures expand in general along the direction of maximum ground stress and the critical pressure decreases with in- creasing ground-stress-differences and 3) the preferred well-disposition pattern is diamond shaped. The preferred well spacing is 250 m×300 m. This study can provide a reference for the design of wells.

关键词： ground stress hydraulic fracturing breakdown pressure RFPA^2D-Flow design of wells

生长的“望亭”——临海靖江山共富风貌驿设计

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浙江建筑 2024年第1期41卷 23-28页

作者：毛淼姚开明郑佳晟章阳李姝浙江省建筑设计研究院浙江杭州310006

以临海市靖江山共富风貌驿设计为例,通过对各地现代“驿站”的建设及设计情况的分析,结合项目基地自身特性及需求,阐述了功能梳理、建构营造、空间组织等设计要素在“驿站”设计中的实践,可为同类型小微型公共服务设施设计提供参考。

关键词：共富风貌驿建构形式公共服务设施微型建筑设计

A combined evaluation of the characteristics and antibiotic resistance induction potential of antibiotic wastewater during the treatment process

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Journal of Environmental Sciences 2024年第4期138卷 626-636页

作者： Sun miao Yanyan Zhang Cong Men Yiou mao Jiane Zuo State Key Joint Laboratory of Environment Simulation and Pollution Control School of EnvironmentTsinghua UniversityBeijing 100084China School of Energy and Environmental Engineering Beijing Key Laboratory of Resource-Oriented Treatment of Industrial PollutantsUniversity of Science and Technology BeijingBeijing 100083China High School Affiliated to Renmin University of China Beijing 100080China Tsinghua Shenzhen International Graduate School Shenzhen 518055China

Antibiotic wastewater contains a variety of pollutant stressors that can induce and promote antibiotic resistance(AR)when released into the *** these substances are mostly in concentrations lower than those known to induce AR individually,it is possible that antibiotic wastewater discharge might still promote the AR transmission risk via additive or synergistic ***,the comprehensive effect of antibiotic wastewater on AR development has rarely been evaluated,and its treatment efficiency remains ***,samples were collected from different stages of a cephalosporin production wastewater treatment plant,and the potential AR induction effect of their chemical mixtures was explored through the exposure of the antibiotic-sensitive Escherichia coli K12 *** with raw cephalosporin production wastewater significantly promoted mutation rates(3.6×10^(3)-9.3×10^(3)-fold)and minimum inhibition concentrations(6.0-6.7-fold)of *** against ampicillin and *** may be attributed to the inhibition effect and oxidative stress of cephalosporin wastewater on *** AR induction effect of cephalosporin wastewater decreased after the coagulation sedimentation treatment and was completely removed after the full treatment process.A Pearson correlation analysis revealed that the reduction in the AR induction effect had a strong positive correlation with the removal of organics and biological *** indicates that the antibiotic wastewater treatment had a collaborative processing effect of conventional pollutants,toxicity,and the AR induction *** study illustrates the potential AR transmission risk of antibiotic wastewater and highlights the need for its adequate treatment.

关键词： Antibiotic wastewater treatment plant Antibiotic resistance Antibiotic resistance induction effect Correlation analysis Biological toxicity

Atomically constructing a van der Waals heterostructure of CrTe_(2)/Bi_(2)Te_(3) by molecular beam epitaxy

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Materials Futures 2023年第2期2卷 1-7页

作者： Jin-Hua Nie Rui Li mao-Peng miao Ying-Shuang Fu Wenhao Zhang School of Physics and Wuhan National High Magnetic Field Center Huazhong University of Science and TechnologyWuhan 430074People’s Republic of China

A 2D heterostructure with proximity coupling of magnetism and topology can provide enthralling prospects for hosting new quantum states and exotic properties that are relevant to next-generation spintronic ***,we synthesize a delicate van der Waals(vdW)heterostructure of CrTe_(2)/Bi_(2)Te_(3) at the atomic scale via molecular beam ***-temperature scanning tunneling microscopy/spectroscopy measurements are utilized to characterize the geometric and electronic properties of the CrTe_(2)/Bi_(2)Te_(3) heterostructure with a compressed vdW *** structural analysis reveals complex interfacial structures with diversiform step heights and intriguing moiré*** formation of the interface is ascribed to the embedded characteristics of CrTe_(2) and Bi_(2)Te_(3) by sharing Te atomic layer upon interfacing,showing intercoupled features of electronic structure for CrTe_(2) and Bi_(2)Te_(3).Our study demonstrates a possible approach to construct artificial heterostructures with different types of ordered states,which may be of use for achieving tunable interfacial Dzyaloshinsky–Moriya interactions and tailoring the functional building blocks in low dimensions.

关键词： molecular beam epitaxy scanning tunneling microscopy/spectroscopy 2D heterostructure interfacial structures

Pharmaceutical applications of framework nucleic acids

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Acta Pharmaceutica Sinica B 2022年第1期12卷 76-91页

作者： Liang Chen Jie Zhang Zhun Lin Ziyan Zhang miao mao Jiacheng Wu Qian Li Yuanqing Zhang Chunhai Fan School of Pharmaceutical Sciences Sun Yat-sen UniversityGuangzhou 510006China School of Chemistry and Chemical Engineering Frontiers Science Center for Transformative Molecules and National Center for Translational MedicineShanghai Jiao Tong UniversityShanghai 200240China Institute of Molecular Medicine Shanghai Key Laboratory for Nucleic Acids Chemistry and NanomedicineRenji HospitalSchool of MedicineShanghai Jiao Tong UniversityShanghai 200127China

DNA is a biological polymer that encodes and stores genetic information in all living organism. Particularly, the precise nucleobase pairing inside DNA is exploited for the self-assembling of nanostructures with defined size, shape and functionality. These DNA nanostructures are known as framework nucleic acids(FNAs) for their skeleton-like features. Recently, FNAs have been explored in various fields ranging from physics, chemistry to biology. In this review, we mainly focus on the recent progress of FNAs in a pharmaceutical perspective. We summarize the advantages and applications of FNAs for drug discovery, drug delivery and drug analysis. We further discuss the drawbacks of FNAs and provide an outlook on the pharmaceutical research direction of FNAs in the future.

关键词： DNA nanotechnology Self-assembly Framework nucleic acids DNA nanostructures Drug discovery Therapeutic molecules Drug delivery Drug analysis

面向工业气源中COS水解转化的催化剂研究进展

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应用化工 2024年第2期53卷 474-478,488页

作者：王晋斌时培祥赵彬武蒙蒙苗茂谦吕永康上官炬秦志峰太原理工大学省部共建煤基能源清洁高效利用国家重点实验室山西太原030024 太原理工大学化学工程与技术学院山西太原030024 太原理工大学安全与应急管理工程学院山西太原030024 山西浙大新材料与化工研究院山西太原030000

综述了COS水解催化剂载体与活性组分对其催化性能的调控作用、水解机理以及工业气氛中影响催化剂催化活性因素的研究现状。研究发现:氧化铝基复合载体负载碱金属活性组分所制备的COS水解催化剂能更好的提高催化剂的活性与稳定性,COS水... 详细信息

综述了COS水解催化剂载体与活性组分对其催化性能的调控作用、水解机理以及工业气氛中影响催化剂催化活性因素的研究现状。研究发现:氧化铝基复合载体负载碱金属活性组分所制备的COS水解催化剂能更好的提高催化剂的活性与稳定性,COS水解反应具有明显的碱催化特征,工业气氛中的CO_(2)与O_(2)气氛浓度对水解催化剂的抗氧耐酸性能有较大的影响,单质硫的生成和/或催化剂表面的硫酸盐化是催化剂失活的主要原因。通过对催化剂失活因素分析,定向调控催化剂的组成与结构制备高活性及高抗氧耐酸性能的新型COS水解催化剂与基于工业气源及水解热力学动力学条件优选下的水解催化反应工艺参数相结合来延长催化剂的寿命是未来的发展趋势。

关键词：羰基硫(COS) 负载型水解催化剂三氧化二铝载体水解机理失活机理

One-step viscoelastic agent technique for ICL V4c implantation for myopia

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International Journal of Ophthalmology(English edition) 2021年第9期14卷 1359-1364页

作者： Hua-mao miao Feng Zhao Ling-Ling Niu Jing Zhao Xiao-Ying Wang Xing-Tao Zhou Department of Ophthalmology Eye and ENT Hospital of Fudan UniversityNHC Key Laboratory of Myopia(Fudan University)Research Center of Ophthalmology and OptometryShanghai 200031China Shanghai Engineering Research Center of Laser and Autostereoscopic 3D for Vision Care(20DZ2255000) Shanghai 200031China Shuguang Hospital Affiliated to Shanghai University of Traditional Chinese Medicine Shanghai 200021China

AIM:To investigate the safety and efficacy of using a onestep viscoelastic agent technique for posterior chamber phakic implantable collamer lens with a central hole(ICL V4 c)implantation for myopia ***:The one-step viscoelastic agent technique for ICL V4 c implantation was used in 100 eyes of 52 *** outcomes,intraocular pressure(IOP),corneal endothelial cell,and corneal densitometry values were evaluated at 1 d,1 wk,1 and 3 mo ***:All the surgeries were *** corrected distance visual acuity was lost after 3 *** was 16.12±3.18 mm Hg before surgery,and 14.74±3.08 mm Hg at 1d and 14.50±2.56 mm Hg at 3 mo after surgery(P0.05).The corneal densitometry values of the central 2 mm and 2 to 6 mm areas showed similar *** surgery,the values significantly increased at 1 d,then decreased to the preoperative values at 1 wk,and then continued to decrease at 3 mo(P<0.05).CONCLUSION:The one-step viscoelastic agent technique for ICL V4c implantation is found to be safe and effective for myopia correction and causes little disturbance to the cornea.

关键词： phakic intraocular lens V4c viscoelastic agent myopia intraocular pressure corneal endothelial cell corneal densitometry