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Effect of lactic acid bacteria and propionic acid on conservation characteristics,aerobic stability and in vitro gas production kinetics and digestibility of whole-crop corn based total mixed ration silage

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Journal of Integrative Agriculture 2017年第7期16卷 1592-1600页

作者： CHEN Lei YUAN Xian-jun LI jun-feng WANG Si-ran dong Zhi-hao shao Tao Institute of Ensiling and Processing of Grass Nanjing Agricultural UniversityNanjing 210095P.R.China

This study was conducted to evaluate the effect of lactic acid bacteria and propionic acid on the fermentation quality, aer- obic stability and in vitro gas production kinetics and digestibility of whole-crop corn based totalmixed ration （TMR） silage. Total mixed ration was ensiled with four treatments：（1） no additives （control）; （2） an inoculant （Lactobacillus plantarum）（L）; （3） propionicacid （P）; （4） propionic acid＋lactic acid bacteria （PL）. All treatments were ensiled in laboratory-scale silos for 45 days, and then subjected to an aerobic stability test for12 days. Further, four TMR silages were incubated in vitro with buffered rumen fluid to study in vitro gas production kinetics and digestibility. The results indicated that all TMR silages had good fermentation characteristics with low pH （〈3.80） and ammonia nitrogen （NH3-N） contents, and high lactic acid contents as well as Flieg points. Addition of L further improved TMR silage quality with more lactic acid production. Addition of P and PL decreased lactic acid and NH3-N contents of TMR silage compared to the control （P〈0.05）. After 12 days aerobic exposure, P and PL silages remained stable, but L and the control silages deteriorated as indicated by a reduction in lactic acid and an increase in pH, and numbers of yeast. Compared to the control, addition of L had no effects on TMR silage in terms of 72 h cumulative gas production, in vitro dry matter digestibility, metabolizable energy, net energy for lactation and short chain fatty acids, whereas addition of PL significantly （P〈0.05） increased them. L silage had higher （P〈0.05） in vitro neutral detergent fiber digestibility than the control silage. The results of our study suggested that TMR silage prepared with whole-crop corn can be well preserved with or without additives. Furthermore, the findings of this study suggested that propionic acid is compatible with lactic acid bacteria inoculants, and when used together, although they reduced lactic acid prod

关键词： lactic acid bacteria propionic acid fermentation quality aerobic stability in vitro digestibility total mixed rationsilage

Effects of Molecular Weight on the Crystallization and Melting Behaviors of Poly(L-lactide)

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Chinese Journal of Polymer Science 2016年第1期34卷 69-76页

作者： Sheng Xiang shao jun 李杲边新超 Li-dong Feng Xue-si Chen Feng-qi Liu shao-yong Huang Key Laboratory of Polymer Ecomaterials Changchun Institute of Applied Chemistry Chinese Academy of Sciences University of Chinese Academy of Sciences College of Chemistry and Chemical Engineering Jiangxi Normal University College of Chemistry Jilin University

In this study, a series of monodispersed poly（L-lactide）（PLLA） were synthesized by the ring-opening polymerization with Schiff base aluminum catalyst, and the effects of the number-average molecular weight（Mn） on the crystallization and melting behaviors of PLLA were investigated by differential scanning calorimetry（DSC） and wide-angle X-ray diffraction（WAXD）. The total crystallization rate of PLLA was Mn-dependent, which reached the maximum value for PLLA with Mn of 18.6 kg/mol. In addition, when Mn of PLLA was 18.6 kg/mol, the melting enthalpy（ΔHm） showed a maximum value（87.1 J/g）, which was the highest reported value till now. The critical temperature for change of crystal formation from ？-form to ？-form crystals increased in the isothermal crystallization process with Mn increasing. In the reheating procedure, high-Mn PLLA demonstrated a small exothermal peak prior to the dominant melting peak, corresponding to crystal transition from ？- to ？-form, but low-Mn PLLA didn＇t show the peak of crystal transition. These different crystallization and melting behaviors were attributed to the different chain mobility of PLLA with different Mn.

关键词： Poly(L-lactide) Crystallization behavior Melting behavior Crystal transition

Establishment and industrial practice of high-temperature process evaluation system in sintering

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Journal of Iron and Steel Research International 2018年第9期25卷 910-922页

作者： Yuan-dong Pei Sheng-li Wu Xiao-jing shao Zhi-xing Zhao Gang An Ze-jun Ma Wei-dong Zhang School of Metallurgical and Ecological Engineering University of Science and Technology BeijingBeijing 100083 China Shougang Research Institute of Technology Beijing 100043China Beijing Key Laboratory of Green Recyclable Process for Iron and Steel Production Technology Beijing 100043 China Shougang Jingtang Integrated Iron and Steel Co. Ltd.Tangshan 063200 Hebei China

The behaviors of typical iron ores at high temperature were observed by confocal scanning laser microscopy. Four critical temperature points and liquid flow velocity at high temperatures of iron ores were obtained and the temperature points contain temperature at which sample starts to shrink, temperature at which the initial liquid phase forms, temperature at which a lot of liquid forms and temperature at which liquid consolidation ends. Under the same CaO to Fe203 ratio, the liquid phase fluidity of iron ore fines of Carajas （IOC） is good. However, under the same basicity, as the content of SiO2 in IOC is low, the liquid phase fluidity of IOC is much smaller than that of Yandi fine. After analysis of the initial formation and development of the liquid phase and the final consolidation process, the high-temperature process evaluation system （HTPES for short） of iron ore was established. The idea of ＂dense ore matching fusible ore＂ instead of ＂relatively fusible ore＂ was proposed based on the results of HTPES and applied in ore matching of a sinter plant from Shougang Jingtang. The use of IOC （13-18%） instead of standard sintering fines （SSF） improved liquid phase fluidity and ensured the sinter quality. Furthermore, the use of IOC fine （18-23%） with Hainan fine （0-2%） instead of SSF, a mixture of hematite and Marra Mamba ore and concentrates guaranteed the quality of sinter ore through improving fluidity, in the meantime reducing ore matching costs. With the establishment and application of HTPES, the sinter plant has achieved good economic benefits under the premise of ensuring the quality of sinter ore.

关键词： Sinter Iron ore In situ observation Fluidity Evaluation Industrial practice

Flow Uniformity of Roller-Type Quenching Machine

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Journal of Iron and Steel Research International 2010年第7期17卷 24-27页

作者： ZHU dong-mei LIU Guo-yong ZHANG shao-jun LI Mou-wei School of Mechanical Engineering University of Science and Technology Beijing Beijing 100083 China

Three-dimensional finite element flow field model of spraying pipe of roller-type quenching machine is *** flow field with different structural parameters is *** grouping the nozzles,the spraying uniformity is analyzed under the conditions of different water inlet pipe diameter,different water inlet pipe distance,nozzle diameter and nozzle *** the spraying intensity absolute deviation and relative deviation are computed under different *** effect of different structural parameters on cooling uniformity is *** results provide theoretical basis for improving production quality and optimizing cooling device design.

关键词： roller-type quenching machine uniform cooling structural parameter

Lung cancer from a focal bulla into thin-walled adenocarcinoma with ground glass opacity—an observation for more than 10 years:A case report

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World Journal of Clinical Cases 2020年第11期8卷 2312-2317页

作者： Shu-Shi Meng shao-dong Wang Yuan-Yuan Zhang jun Wang Department of Thoracic Surgery Peking University People’s HospitalBeijing 100044China Department of Pathology Peking University People’s HospitalBeijing 100044China

BACKGROUND Thin-walled lung cancer manifests as a cystic lesion,mostly *** is often misdiagnosed as a benign lesion in clinical practice,thus delaying the diagnosis and surgical *** natural course is rarely recorded and observed;thus,the pathogenesis and diagnosis need to be clarified and *** SUMMARY A 66-year-old man developed a mass in the upper lobe of the right lung and a small,thin-walled cavity in the lower lobe of the right lung in *** right upper lobe mass was confirmed to be adenocarcinoma after *** cavity diameter increased from 11 mm to 31 mm over 10 years,and a ground glass opacity lesion appeared around the bulla on computed tomography.A second operation confirmed that the lesion was lepidic predominant *** we report a rare case of lung cancer developing from a focal bulla to a thinwalled adenocarcinoma for more than 10 years and confirm that the check-valve mechanism explains the *** Solitary thin-walled lung adenocarcinoma is a rare tumor in terms of its clinical manifestations,pathogenesis,and disease *** check-valve mechanism can explain the cause of thin-walled lung *** follow-up and accurate imaging are necessary.

关键词： Thin-walled lung cancer Observation The check-valve mechanism Case report

Regularization of mathematical model for chip flow angle catastrophe

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Advances in Manufacturing 2021年第4期9卷 568-579页

作者： shao-Nan Zhang dong-dong Cheng Liang-Shan Xiong School of Mechanical Science and Engineering Huazhong University of Science and TechnologyWuhan 430074People’s Republic of China

The chip flow angle(CFA)catastrophe in double-edged cutting results in a significant reduction in the cutting force,which can benefit the ***,established potential functions(i.e.,cutting power calculation functions)of mathematical models for the CFA catastrophe are presented in the form of transcendental functions with two control parameters and one state parameter,which are extremely complex.A method is proposed herein to realize the regularization of the potential functions and establish mathematical models in a standard form and with complete content for the CFA *** this method,the potential function of the CFA catastrophe is expanded into a k-order Taylor polynomial at each midpoint of N end-to-end equally partitioned intervals of the state parameter using the Taylor function provided in *** potential function after piecewise Taylor expansion is transformed into the same form as the potential function of the standard cusp catastrophe model by truncating the first five terms of the Taylor polynomial and eliminating the third-order term of the state parameter with elementary ***,the regularization of potential function is ***,the regularization of equilibrium surface and bifurcation set can be realized based on the conclusions of the catastrophe *** errors of the potential function,equilibrium surface,and bifurcation set are defined to evaluate the effectiveness of this regularization *** problem of calculating regularization errors is regarded as an optimization ***‘‘simulannealbnd’’function provided in MATLAB is used to solve the *** the proposed method,the regularization of a mathematical model for the CFA catastrophe established by the predecessor is completed;a mathematical model(i.e.,standard cusp catastrophe model)in a standard form and with complete content for the CFA catastrophe is established;and the corresponding regularization errors

关键词： Chip flow angle(CFA)catastrophe Mathematical model Regularization Potential function Catastrophe theory Cusp catastrophe model

Development of Single-Molecule Magnets

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Chinese Journal of Chemistry 2020年第9期38卷 1005-1018页

作者： dong shao Xin-Yi Wang State Key Laboratory of Coordination Chemistry Collaborative Innovation Center of Advanced MicrostructuresSchool of Chemistry and Chemical EngineeringNanjing UniversityNanjingJiangsu 210023China

Single-molecule magnets(SMMs)are paramagnetic molecules that can be magnetized below a certain temperature and have potential applications in high-density information storage,magnetic-qubits,spintronic devices,*** discovery of the first SMM,Mn12,opened a new era of molecular magnetism and promoted collaborative researches between chemists and physicists for their exotic quantum as well as classical magnetic *** the recent past,great efforts have been madefto develop strategies for constructing new SMMs with high energy barriers(Ueff)and blocking temperatures(Tb), resulting in great and fast development of *** this concise review,we highlight the main synthetic approaches and representative results in the design and synthesis of high *** hope to give the readers a basic understanding of SMMs and a snapshot of the representative researches on SMMs from a perspective of synthetic chemists.

关键词： properties. magnets constructing

AN ANISOTROPIC NONCONFORMING FINITE ELEMENT WITH SOME SUPERCONVERGENCE RESULTS

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Journal of Computational Mathematics 2005年第3期23卷 261-274页

作者： dong-yangShi Shi-pengMao shao-chunChen DepartmentofMathematics ZhengzhouUniversityZhenzhou450052China

The main aim of this paper is to study the error estimates of a nonconforming finite element with some superconvergence results under anisotropic meshes. The anisotropic interpolation error and consistency error estimates are obtained by using some novel approaches and techniques, respectively. Furthermore, the superclose and a superconvergence estimate on the central points of elements are also obtained without the regularity assumption and quasi-uniform assumption requirement on the meshes. Finally, a numerical test is carried out, which coincides with our theoretical analysis.

关键词： anisotropic meshes nonconforming finite element interpolation error andconsistency error estimates superclose superconvergence

THREE DIMENSION QUASI-WILSON ELEMENT FOR FLAT HEXAHEDRON MESHES

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Journal of Computational Mathematics 2004年第2期22卷 178-187页

作者： shao-chunChen dong-yangShi Guo-biaoRen DepartmentofMathematics ZhengzhouUniversityZhengzhou450002China

The well known Wilson's brick is only convergent for regular cuboid meshes. In this paper a quasi-Wilson element of three dimension is presented which is convergent for any hexahedron meshes. Meanwhile the element is ... 详细信息

关键词： Anisotropic convergence Nonconforming element Three dimension Quasi-Wilson element