广谱乳酸菌细菌素enterocin LM-2对低温切片火腿的防腐保鲜效果(英文)

为考察广谱乳酸菌细菌素enterocin LM-2对低温切片火腿的防腐保鲜效果,并探讨其在低温肉制品防腐保鲜中的应用可行性。本研究在不添加任何化学防腐剂的前提下,分别添加80、320、1280AU/g enterocin LM-2处理低温切片火腿,分析不同浓度细菌素处理前后样品中微生物数量、理化指标以及感官特性的变化。结果发现:细菌素enterocin LM-2的添加可明显延长低温切片火腿的货架期,有效减少贮藏过程中挥发性盐基氮的生成及脂肪氧化程度,并保持产品原有色泽、气味、质构等感官特性。综合微生物和理化特性分析结果,确定添加1280AU/g enterocin LM-2的处理组防腐效果最好,可将低温切片火腿的货架期延长至49d。这些结果都显示出乳酸菌细菌素enterocin LM-2有作为天然生物防腐剂应用于低温肉制品防腐保鲜中的巨大应用潜力。

Technology Improvement for the High Reliability LM-2F Launch Vehicle

The Long March 2 F(LM-2F) launch vehicle, the only launch vehicle designed for manned space flight in China, successfully launched the Tiangong 2 space laboratory and the Shenzhou 11 manned spaceship into orbits in 2016 respectively. In this study, it introduces the technological improvements for enhancing the reliability of the LM-2F launch vehicle in the aspects of general technology, control system, manufacture and ground support system. The LM-2F launch vehicle will continue to provide more contributions to the Chinese Space Station Project with its high reliability and 100% success rate.

LM-2C Successfully Launched Yaogan 30-01 Satellites

The LM-2C launch vehicle lifted off from the Xichang Satellite Launch Center with the Yaogan 30-01 satellites （3 satel- lites with one rocket） at 12：21 Beijing time on September 29. The satellites en- tered their preset orbits. It was the 25 I st flight of the LM series launch vehicle.

DFH-3F2 Successfully Launched by the LM-3A

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LM-2D Launched SaudiSat 5A & SaudiSat 5B Successfully

At 12:12 Beijing time on December7th,2018,SaudiSat 5A&SaudiSat 5B were successfully launched into the predicted orbit onboard a LM-2D Launch Vehicle from Jiuquan Satellite Launch Center(JSLC),along with 10 piggyback satellites.

Chinese LM-2C Launch Vehicle

Developed on the basis of the LM-2, the LM-2C was designed to launch China’s indigenous recoverable satellite. It can be used to launch a large satellite into low orbit. The LM-2C is a two-stage liquid launch vehicle updated on the basis of a long-range rocket.

Preliminary Debris Mitigation Design Of LM-2C 2nd Stage Propulsion System

After satellite deployment, the second stage of a LM-2C launch vehicle performing a SSO mission has an orbital life of over 50 years. It is therefore necessary to vent the residual propellants in the 2nd stage to avoid debris-generating in-orbit explosion. Based on the characteristics of LM-2C, several concepts have been proposed. After detailed evaluation of these concepts, the method to drain the residual propellants through the main valves of the main engine has been selected.

DSP Birds Will Be Launched on LM-2C

China's LM-2C launch vehicle, well reputed for its 20 successes in a row, will be used to launch a pairof satellites for the Double Star Project (DSP) designed to study the effects of the Sun on the Earth's environment.

LM-3B Successfully Launched Communications Technology Test Satellite 2

At 23:18 Beijing time on January 5,a LM-3B carrier rocket lifted off from the Xichang Satellite Launch Center,sending a communication technology test satellite into its preset orbit.This successful launch was a good start for China’s launch missions in 2017.The Communications Technology Test Satellite 2 was developed by the Shanghai Academy of Spaceflight Technology.It is a next-generation telecom-

CBERS-2 to Be Launched on LM-4B

China National Space Administration (CNSA) announced on 30 July 2003 that tests on the CBERS-2 hadbeen completed and now the satellite is ready for launch within the year together with another microsat Chuangxin-1 (CX-1, Chuangxin means 'innovation') developed by the Chinese Academy of

LM-3A Successfully Launched the FY-2F Satellite

China successfully launched the meteorological satellite FY-2F into space at 8:56 a.m.on January 13 from the Xichang Satellite Launch Center.Developed and produced by the Shanghai Academy of Spaceflight Technology (SAST),a subsidiary of the

LM-2C Used in SJ-9A/B Mission

At 11:25 a.m. on October 14, China successfully sent the SJ-9A/B satellites into their preset transfer orbits with one LM-2C launch vehicle from the Taiyuan Satellite Launch Center. The LM-2C launch vehicle used for the mission was manufactured by China Academy of Launch Vehicle Technology (CALT) of China Aerospace Science and Technology Corporation (CASC). The launch marked the 169th launch of the Long March series launch vehicle. The launch vehicle used for the mission differs not much

LM-2C Series Launch Vehicles

On December 30, 2003, a LM-2C/SM launch vehicle was launched from Xichang Satellite Launch Center (XSLC), successfully sending TC-1 satellite into orbit. The satellite is the first one of the two scientific satellites known as Double Star. The operation orbit of the satellite is the highest compared with China's other satellites ever launched.

LM-2F: A Great Launch Vehicle for China's Manned Spaceflight

The LM-2F launch vehicle is China's first launch carrier developed for China's Manned Space Program,which is one of the most important parts of the Program.It is developed from the LM-2E launch vehicle,with addition of two new systems,an escape system and a fault detection system.

LM-2D Successfully Launched Land Survey Satellites

LM-2D carrier rockets placed two land survey satellites into their preset orbits from the Jiuquan Satellite Launch Center at 12：11 Beijing time on December 3 and 12：14 Beijing time on December 23 respectively.The missions were the 257th and the 259th flights of the LM series launch vehicle respectively.The two land survey satellites were developed by DFH Satellite Co.,Ltd.under the China Academy of Space Technology（CAST）.

LM-2C Sent Yaogan 13 into Space

The Yaogan 13 remote sensing satellite was launched into orbit from the Taiyuan Satellite Launch Center on November 30 on a LM-2C launch vehicle.Developed by SAST,the satellite will be used for scientific experiments,land survey,crop yield assessment and disaster monitoring.

LM-2C Launched Two Sets of Yaogan 30 Satellites

LM-2C launch vehicles launched two sets of Yaogan 30 satellites from the Xichang Satellite Launch Center respectively on November 25 and December 26.The second one was the last launch mission carried out by CASC in 2017.LM-2C was developed by the China Academy of Launch Vehicle Technology.It is the only one among the LM series launch vehicle that can conduct flight missions from the three inland launch sites.

LM-2D Delivered Chuangxin 1-03 and Shiyan Satellite 4 into Preset Orbit

Two experimental satellites, Chuangxin 1-03 and Shiyan Satellite 4, were put into orbit on a LM-2D launch vehicle from the Jiuquan Satellite Launch Center (JSLC) in northwest China's Gansu Province on November 20.

China Launches First Ever Nano-satellite

China successfully launched two scientific satellites, including a nano-satellite for the first time, heralding a breakthrough in space technology. A LM-2C rocket carrying Nano-Satellite I (NS-1), which weighs just 25kg and an Experiment Satellite I, weighing 204kg blasted off at 11:59 p.m. on April 18,