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Chinese Science Bulletin 1991年第5期36卷 404-408页

作者：吴季辉林治焕 Institute of Biophysics Academia Sinica Beijing 100080 PRC Institute of Biophysics Academia Sinica Beijing 100080 PRC The membrane-bound H~+-ATPase of E. coil consisted of two parts: F_1 and F_0. Purified εsubunit of F_1 strongly inhibited F_1 but showed no inhibitory effect in reconstituted F_1F_0. In 1987 G. B. Cox et al. isolated a mutant of εsubunit and two partial revertants Their experiments showed that F_1F_0 complex was still formed in the mutant. The hydrolytic activity and transmembrane proton transfer ability were all impaired in the mutant

The membrane-bound H+-ATPase of E. coil consisted of two parts: f1 and f0. Purified ε subunit of f1 strongly inhibited f1 but showed no inhibitory effect in reconstituted f1f0. In 1987, G. B. Cox et al. isolated a mutant of ε subunit, and two partial revertants, Their experiments showed that f1f0 complex was still formed in the mutant. The hydrolytic activity and transmembrane proton transfer ability were all impaired in the

关键词： Escherichia coli f1f0 εsubunit mutation.

Snapshot imaging of ultrashort electron bunches

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Light(Science & Applications) 2024年第7期13卷 1226-1228页

作者： Andreas Döpp Ludwig-Maximilian-Universität München Am Coulombwall 185748GarchingGermany Max Planck Institut für Quantenoptik Hans-Kopfermann-Strasse 1Garching85748Germany

New measurements combine spatial and temporal information from optical transition radiation to estimate the three-dimensional structure of electron bunches from a laser wakefield accelerator.

关键词： ultrashort Snapshot electron

Structure and immunomodulatory activity of Lentinus edodes polysaccharides modified by probiotic fermentation

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food Science and Human Wellness 2024年第1期13卷 421-433页

作者： Jingjing Liang Meina Zhang Xiaohan Li Yuan Yue Xiaowei Wang Mengzhen Han Tianli Yue Zhouli Wang Zhenpeng Gao College of food Science and Engineering Northwest A&F UniversityYangling 712100China Xi'an GaoXin No.1 High School Xi'an 710065China

Plant-based fermentations provide an untapped source for novel biotechnological *** this study,a probiotic named Lactobacillus fermentum 21828 was introduced to ferment Lentinus *** were extracted from fermented and non-fermented *** and purified via DEAE-52 and Sephadex *** components designated f-LEP-2a and Nf-LEP-2a were analyzed by fT-IR,HPGPC,HPAEC,SEM,GC-MS and *** results revealed that probiotic fermentation increased the molecular weight from 1.16×10^(4) Da to 1.87×10^(4) Da and altered the proportions of glucose,galactose and mannose,in which glucose increased from 45.94%to 48.16%.Methylation analysis and NMR spectra indicated that f-LEP-2a and Nf-LEP-2a had similar linkage ***,their immunomodulatory activities were evaluated with immunosuppressive ***-LEP and f-LEP improved immune organ indices,immunoglobulin(Ig G and Ig M)and cytokines concentrations;restored the antioxidation capacity of liver;and maintained the balance of gut microbiota.f-LEP displayed better moderating effects on the spleen index,immunoglobulin,cytokines and the diversity of gut microbiota than Nf-LEP(200,400 mg/kg).Our study provides an efficient and environment-friendly way for the structural modification of polysaccharides,which helps to enhance their biological activity and promote their wide application in food,medicine and other fields.

关键词： Lentinus edodes polysaccharide Lactobacillus fermentum fermentation Structural analysis Immunoregulatory activity Nuclear magnetic resonance

Discovery potential of the Glashow resonance in an air shower neutrino telescope

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Chinese Physics C 2024年第8期48卷 266-275页

作者： Guo-Yuan Huang School of Mathematics and Physics China University of GeosciencesWuhan 430074China Max-Planck-Institut für Kernphysik Saupfercheckweg 169117 HeidelbergGermany

The in-ice or in-water Cherenkov neutrino telescope,such as IceCube,has already proved its power in measuring the Glashow resonance by searching for the bump around E_(ν)=6.3PeV arising from the W-boson *** are many proposals for the next few decades for observations of cosmic tau neutrinos with extensive air showers,also known as tau neutrino *** air shower telescope is,in principle,sensitive to the Glashow resonance via the channel W→τν_(τ)followed by the tau decay in the air(e.g.,TAMBO,which has a geometric area of approximately 500km^(2)).Using a thorough numerical analysis,we find that the discovery significance can be up to 90%with a TAMBO-like setup if PeV neutrinos primarily originate from neutron decays,considering the flux parameters measured by IceCube as the *** presence of new physics affecting the neutrino flavor composition can also increase the ***,if ultrahigh-energy neutrinos are dominantly produced from meson decays,it will be statistically difficult for an advanced proposal such as TAMBO to discriminate the Glashow resonance induced byν¯e from the intrinsicντ/ν¯_(τ)*** have identified several limitations for such advanced telescopes,in comparison with the in-ice or in-water telescope,when measuring resonances:(i)a suppressed branching ratio of 11%for the decay W→τν_(τ);(ii)the smearing effect and reduced acceptance because the daughter neutrino takes away(y)∼75%of the energy from the W decay;and(iii)a large attenuation effect for Earth-skimming neutrinos with the resonance.

关键词： Ultrahigh-energy neutrinos Neutrino telescopes Glashow resonance

Reversion of multidrug resistance of human gastric cancer SGC7901/DDP cells by E2f-1 gene silencing

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China Medical Abstracts(Internal Medicine) 2014年第2期31卷 108-109页

作者：廉超 Dept Gastro & Gland Surg 1st Affil HospGuangxi Med Univ

Objective To investigate the effects of E2f-1 gene silencing on multidrug resistance of human gastric cancer SGC7901/DDP cells and its possible *** Gastric cancer SGC7901/DDP cells were seeded in 6 well plates and div... 详细信息

关键词： silencing blank adriamycin declined suppression maximal indirectly chemotherapy finally

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本田的f1之路

汽车与运动 2006年第8期 166-169页

作者：李晓非 Honda f1 Media

Honda不仅仅是世界上最大的发动机制造商,还是一家参与了几乎所有国际汽车运动项目的汽车公司。Honda一直把参加前沿竞赛作为其高科技产品的最终实验场。

关键词： f1

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f1后视镜

汽车杂志 2006年第5期 176-177页

“以空气力学的观点来说。事实上我们不应该在车身上设置后视镜，”McLaren车队设计工程师Steve Talbot承认一对后视镜也占有影响空气力学的关键性。但生命对f1而言非常宝贵。但后视镜的技术提升至今仍然是McLaren车队设法解决的问题之一。

关键词：后视镜 McLaren 空气力学 Steve 设计工程师技术提升车队车身

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巴纳维亚555项目颠覆f1赛车速度历史

汽车与运动 2006年第9期 134-137页

作者：金涛本田f1车队

一直以来,f1圈内流传着这么一句经典疑问:f1赛车的终极速度到底有多快?设想一下,如果f1车队把赛车尾翼摘除,并给赛车提供一条足够长的直道,那这样的赛车又能够达到多快的速度?

关键词：赛车项目小组刷新速度挑战发动机速度冲击当地时间终极速度盐滩历史

A Survey on Sensor-and Communication-Based Issues of Autonomous UAVs

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Computer Modeling in Engineering & Sciences 2024年第2期138卷 1019-1050页

作者： Pavlo Mykytyn Marcin Brzozowski Zoya Dyka Peter Langendoerfer IHP-Leibniz-Institut für Innovative Mikroelektronik Wireless SystemsFrankfurt(Oder)15236Germany BTU Cottbus-Senftenberg Faculty 1:MINTCottbus03046German

The application field for Unmanned Aerial Vehicle (UAV) technology and its adoption rate have been increasingsteadily in the past years. Decreasing cost of commercial drones has enabled their use at a scale broader thanever before. However, increasing the complexity of UAVs and decreasing the cost, both contribute to a lack ofimplemented securitymeasures and raise new security and safety concerns. for instance, the issue of implausible ortampered UAV sensor measurements is barely addressed in the current research literature and thus, requires moreattention from the research community. The goal of this survey is to extensively review state-of-the-art literatureregarding common sensor- and communication-based vulnerabilities, existing threats, and active or passive cyberattacksagainst UAVs, as well as shed light on the research gaps in the literature. In this work, we describe theUnmanned Aerial System (UAS) architecture to point out the origination sources for security and safety *** the coverage and completeness of each related research work in a comprehensive comparison table as wellas classify the threats, vulnerabilities and cyber-attacks into sensor-based and communication-based ***, for each individual cyber-attack, we describe existing countermeasures or detectionmechanisms andprovide a list of requirements to ensureUAV’s security and *** also address the problem of implausible sensormeasurements and introduce the idea of a plausibility check for sensor data. By doing so, we discover additionalmeasures to improve security and safety and report on a research niche that is not well represented in the currentresearch literature.

关键词： Unmanned aerial vehicle unmanned aerial system cyber security and privacy drone swarm security vulnerabilities cyber-threats cyber-attacks plausibility check

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星条旗下的f1故事美国大奖赛的历史档案

汽车之友 2021年第12期 82-85页

作者：钱俊(文/图) 无不详 f1车队 fIA

虽然拼热度,f1很难与本土化的“跑圈赛事”——IndyCar和NASCAR相提并论,但在赛车世界头牌71年的历史里,“美国大奖赛(United States Grand Prix)”共41次办赛,f1仅13年缺席造访世界国土面积第四大的国家。四月中,f1宣布将在弗罗里达州... 详细信息

虽然拼热度,f1很难与本土化的“跑圈赛事”——IndyCar和NASCAR相提并论,但在赛车世界头牌71年的历史里,“美国大奖赛(United States Grand Prix)”共41次办赛,f1仅13年缺席造访世界国土面积第四大的国家。四月中,f1宣布将在弗罗里达州的“美国最富裕城市”——迈阿密举办“美国第二站”。《汽车之友》·冲程带您回顾f1在美国的历史。

关键词：历史档案国土面积大奖赛迈阿密本土化赛事