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枯草芽孢杆菌复合制剂对蛋鸡生产性能和肠道菌群的影响

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饲料研究 2024年第15期47卷 34-39页

作者：付强郭时金王建军程立坤赵修报姜忠兴付石军山东省滨州畜牧兽医研究院山东滨州256600 山东绿都生物科技有限公司山东滨州256600

试验旨在探究枯草芽孢杆菌复合制剂对蛋鸡生产性能和肠道菌群的影响。选取30只500日龄体重相近的蛋鸡随机分为2组,每组3个重复,每个重复5只蛋鸡。CK组(对照组)饲喂玉米-豆粕基础饲粮,T组在基础饲粮中添加1 g/kg枯草芽孢杆菌复合制剂。... 详细信息

试验旨在探究枯草芽孢杆菌复合制剂对蛋鸡生产性能和肠道菌群的影响。选取30只500日龄体重相近的蛋鸡随机分为2组,每组3个重复,每个重复5只蛋鸡。CK组(对照组)饲喂玉米-豆粕基础饲粮,T组在基础饲粮中添加1 g/kg枯草芽孢杆菌复合制剂。试验期70 d。结果显示,与CK组相比,T组料蛋比显著降低(P<0.05);在门水平,十二指肠厚壁菌门相对丰度极显著增加(P<0.01),回肠放线菌门相对丰度显著增加(P<0.05),盲肠变形菌门相对丰度极显著降低(P<0.01);在属水平,十二指肠乳杆菌属相对丰度极显著增加(P<0.01),棒状杆菌属丰度极显著降低(P<0.01),回肠肠球菌属和卡多维亚氏菌(Aeriscardovia)相对丰度显著或极显著增加(P<0.05或P<0.01),盲肠理研菌科相对丰度显著增加(P<0.05)。β多样性分析显示,十二指肠和回肠菌群结构具有一定的相似性,且与盲肠菌群结构不同。研究表明,添加枯草芽孢杆菌复合制剂可促进乳酸菌、Aeriscardovia生长,优化了肠道菌群结构,提高了饲料利用率。

关键词：枯草芽孢杆菌复合制剂蛋鸡生长性能肠道菌群高通量测序菌群多样性

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抗弯曲杆菌益生菌在家禽生产中的研究进展

饲料研究 2024年第4期47卷 162-165页

作者：王敬茹李书光付石军滨州市滨城区农业农村综合服务中心山东滨州256600 山东省滨州畜牧兽医研究院山东滨州256600

弯曲杆菌属能够黏附在不同的宿主表面,具有生物膜形成能力,并且对不同宿主的侵袭性高,在外部环境中的存活能力强。在饲粮中添加益生菌可预防机体感染弯曲杆菌。益生菌能够提高宿主肠道有益微生物的数量,对抗病原体在肠道中的定植,并通... 详细信息

弯曲杆菌属能够黏附在不同的宿主表面,具有生物膜形成能力,并且对不同宿主的侵袭性高,在外部环境中的存活能力强。在饲粮中添加益生菌可预防机体感染弯曲杆菌。益生菌能够提高宿主肠道有益微生物的数量,对抗病原体在肠道中的定植,并通过产生短链脂肪酸发挥益生效果。益生菌还可减轻肠道炎症,从而降低弯曲杆菌感染宿主病程的严重程度。文章总结了抗弯曲杆菌益生菌在家禽生产中的研究成果,探讨了抗弯曲杆菌益生菌的抗菌机制,为抗弯曲杆菌的生产实践研究提供参考。

关键词：益生菌弯曲杆菌家禽

Preparation and Rheological Characterization of Long Chain Branching Polyglycolide

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Chinese Journal of Polymer Science 2024年第8期42卷 1177-1184页

作者： Wei-Lin Liu Ming-fu Lyu Heng-Yuan Zhang Jian-Ye Liu shi-jun Zhang Beijing University of Chemical Technology Beijing 100029China SINOPEC(Beijing)Research Institute of Chemical Industry Co. Ltd.Beijing 100013China

The long chain branching(LCB)polyglycolide(PGA)was successfully prepared by the successive reactions of the terminal hydroxyl groups of PGA with triglycidyl isocyanurate(TGIC)and pyromellitic dianhydride(PMDA).The influence of LCB produced by functional group reaction on rheological and crystallization behavior was studied and discussed through linear rheology,uniaxial elongation and DSC(differential scanning calorimetry).The much higher viscosity and the more notable strain hardening behavior of modified PGA indicates the LCB with high degree of entanglements are *** melt strength of PGA is finally improved greatly and can make su re that the supercritical CO_(2)foaming can be carried out successfully.

关键词： Polyglycolide(PGA) Long chain branching(LCB) Rheology

Chemical Composition, Pharmacological Effects and Clinical Applications of Cinobufacini

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Chinese Journal of Integrative Medicine 2024年第4期30卷 366-378页

作者： ZUO Qian XU Ding-qiao YUE shi-jun fu Rui-jia TANG Yu-ping Key Laboratory of Shaanxi Administration of Traditional Chinese Medicine for TCM Compatibility Shaanxi University of Chinese MedicineXi'an(712046)China

Chinese medicine cinobufacini is an extract from the dried skin of Bufo bufo gargarizans Cantor,with active ingredients of bufadienolides and indole *** further research and clinical applications,it is found that cinobufacini alone or in combination with other therapeutic methods can play an anti-tumor role by controlling proliferation of tumor cells,promoting apoptosis,inhibiting formation of tumor neovascularization,reversing multidrug resistance,and regulating immune response;it also has the functions of relieving cancer pain and regulating immune *** this paper,the chemical composition,pharmacological effects,clinical applications,and adverse reactions of cinobufacini are ***,the extraction of monomer components of cinobufacini,the relationship between different mechanisms,and the causes of adverse reactions need to be further ***,high-quality clinical studies should be conducted.

关键词： cinobufacini chemical composition Chinese medicine pharmacological effect clinical application adverse effect

A fuzzy Trust Management Mechanism with Dynamic Behavior Monitoring for Wireless Sensor Networks

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China Communications 2024年第5期21卷 177-189页

作者： fu shiming Zhang Ping shi Xuehong School of Artificial Intelligence Chongqing University of EducationChongqing 400065China School of Communications and Information Engineering Chongqing University of Posts and TelecommunicationsChongqing 400065China

Traditional wireless sensor networks(WSNs)are typically deployed in remote and hostile environments for information *** wireless communication methods adopted by sensor nodes may make the network highly vulnerable to various *** encryption and authentication mechanisms cannot prevent attacks launched by internal malicious *** trust-based security mechanism is usually adopted to solve this problem in ***,the behavioral evidence used for trust estimation presents some uncertainties due to the open wireless medium and the inexpensive sensor ***,how to efficiently collect behavioral evidences are rarely *** address these issues,in this paper,we present a trust management mechanism based on fuzzy logic and a cloud ***,a type-II fuzzy logic system is used to preprocess the behavioral evidences and alleviate ***,the cloud model is introduced to estimate the trust values for sensor ***,a dynamic behavior monitoring protocol is proposed to provide a balance between energy conservation and safety *** results demonstrate that our trust management mechanism can effectively protect the network from internal malicious attacks while enhancing the energy efficiency of behavior monitoring.

关键词： behavior monitoring cloud fuzzy trust wireless sensor networks

Distributed Optimal Formation Control for Unmanned Surface Vessels by a Regularized Game-Based Approach

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IEEE/CAA Journal of Automatica Sinica 2024年第1期11卷 276-278页

作者： jun shi Maojiao Ye the School of Automation Nanjing University of Science and TechnologyNanjing 210094China IEEE

Dear Editor,This letter explores optimal formation control for a network of unmanned surface vessels(USVs).By designing an individual objective function for each USV,the optimal formation problem is transformed into a noncooperative *** this game theoretic framework,the optimal formation is achieved by seeking the Nash equilibrium of the regularized game.A modular structure consisting of a distributed Nash equilibrium seeker and a regulator is proposed.

关键词： Regular seeking optimal

Genetic Variation of Inbred Lines of Maize Detected by SSR Markers

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Agricultural Sciences in China 2001年第1期 14-20页

作者： LI Xin-hai fu jun-hua ZHANG shi-huang YUAN Li-xing LI Ming-shun The Institute of Crop Breeding and Cultivation Chinese Academy of Agoriculturas Sciences Key Laboratory of Crop Breeding and Cultivation Ministry of Agriculture Beijing 100081 The Institute of Crop Breeding and Cultivation Chinese Academy of Agoriculturas Sciences Key Laboratory of Crop Breeding and Cultivation Ministry of Agriculture Beijing 100081 The Institute of Crop Breeding and Cultivation Chinese Academy of Agoriculturas Sciences Key Laboratory of Crop Breeding and Cultivation Ministry of Agriculture Beijing 100081 The Institute of Crop Breeding and Cultivation Chinese Academy of Agoriculturas Sciences Key Laboratory of Crop Breeding and Cultivation Ministry of Agriculture Beijing 100081 The Institute of Crop Breeding and Cultivation Chinese Academy of Agoriculturas Sciences Key Laboratory of Crop Breeding and Cultivation Ministry of Agriculture Beijing 100081

Simple sequence repeats (SSRs) were used to detect genetic variation among 21 maize(Zea mays L. ) inbred lines. Forty-three SSR primers selected from 69 primers gave stable amplification profiles, which could be clearly resolved on 3% Metaphor agarose gel, and produced 127 polymorphic amplified *** average number of alleles per SSR locus was 2.95 with a range from 2 to 7. The polymorphism information content (PIC) for the SSR loci varied from 0.172 to 0.753 with an average of 0.511. Genetic similarities among the 21 lines ranged from 0.480 between the combination of Zhongzi451 vs. K12 up to 0.768 between CA156 vs. Ye478. The cluster analysis showed that 21 inbred lines could be classified into two distinct clusters with several subclusters, which corresponded to the heterotic groups determined by their pedigree *** SSR primers, which had high level of polymorphism, could allow a rapid and efficient identification of 21 inbreds. Consequently, SSR markers could be used for measuring genetic variation of maize inbred lines and assigning them to heterotic groups.

关键词： Maize Simple sequence repeats Genetic variation Heterotic groups Polymorphism information content

Survey on performance of vertical slot and nature-like fishways at Angu hydropower station, Southwest China

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Water Science and Engineering 2024年第1期17卷 83-91页

作者： jun-jian Sun Jia-yue shi Qi Zhang Xiao-tao shi jun-jun Tan PowerChina Huadong Engineering Corporation Limited Hangzhou 311122China Hubei International Science and Technology Cooperation Base of Fish Passage China Three Gorges UniversityYichang 443002China

To restore dam-blocked natural fish migratory passages,a growing number of artificial fishways have been built in water conservancy and hydropower projects in *** Angu hydropower station involved diverse important fish habitats in the lower reaches of the Daduhe River in Southwest ***,a vertical slot fishway(VSF)and a nature-like fishway(NLF)were built near the backwater area of the reservoir to connect the upstream and downstream *** and aquatic ecological surveys were conducted after the completion of the project to estimate the fish passing effect of the two *** results indicated that both fishways were in effective operation and could maintain the desired hydrodynamic conditions and be used by several local fish *** the survey,149 fish from 15 species and 111 fish from 17 species were captured by the traps in the VSF and NLF,respectively,while 1263 fish from 27 species were found in the downstream *** species captured in the VSF were not found in the NLF,and vice versa,which implied the different preferences of ***,3789 signals including 2099 upward ones and 1690 downward ones were monitored with an ultrasonic fish detector at the inlet of the *** findings revealed the characteristics of fish species observed in and near the fishways and provided valuable insights into the different fish passing capabilities of VSFandNLF.

关键词： Vertical slot fishway Nature-like fishway Aguatic ecological survey Fishwaymonitoring Statistical analysis

Oxidation resistant low-alloyed Ti alloys with good ductility

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Rare Metals 2024年第8期43卷 3921-3936页

作者： Meng Li Zhang-Zhi shi jun-Yi Xu fu-Zhi Dai Xiang-Min Li Zi-Lin Li Lu-Ning Wang Beijing Advanced Innovation Center for Materials Genome Engineering State Key Laboratory for Advance Metals and MaterialsSchool of Materials Science and EngineeringUniversity of Science and Technology BeijingBeijingBeijing 100083China Institute of Materials Intelligent Technology Liaoning Academy of MaterialsShenyang 110004China

Oxidation resistance enhancement of pure Ti often comes at the cost of reduced ductility,which is frequently the problem through alloying with sole Al,Si,W,Mo and *** overcome the short coming of single element alloying,this paper proposes a multi-element low-alloying strategy to take advantage of synergistic effects and resolve the conflict between oxidation resistance and *** demonstrates that the addition of a small quantity of Ta(0.51wt%)can boost both oxidation resistance and ductility in comparison to pure ***,the combined addition of a small amount(0.54 wt%)of Ta,Nb and Si not only preserves good ductility of pure Ti,but also reduces mass gains to 14%-67%of pure Ti during 100 h oxidation at 650-850℃in *** indicates even better oxidation resistance than that obtained through the use of Ta,Nb,or Nb+Ta *** Ta+Nb+Si alloying creates an oxide layer that is less porous and more resistant to stratification and ***,a 3-μm N-rich layer can form in the Ti substrate beneath the oxide scale,in which phase transformation generates coherent Ti_(2)N with(0001)_(Ti)as the habit plane,with N atoms prefers to diffuse along■than along[0001]_(Ti).The completely transformed Ti_(2)N region or partially transformed Ti+Ti_(2)N region can effectively impede oxygen ***,the multielement low-alloying strategy is promising for enhancing both oxidation resistance and mechanical properties of metallic materials in the future.

关键词： Ti alloys Multi-element Co-alloying Oxidation resistance Mechanical properties