首页 | 本学科首页   官方微博 | 高级检索  
相似文献
 共查询到10条相似文献,搜索用时 492 毫秒
1.
XAFS Study on Solid State Amorphization of Alloys by Mechanical Alloying   总被引:2,自引:0,他引:2  
IntroductionMechanicalalloying(MA)ofelementalpowdermixtureandmechanicalmilling (MM )ofinter metallicpowderhavebeensuccessfullyemployedinrecentyearsasamethodforsynthesizingamor phousandnano crystallinealloys[1~ 3 ] .XAFSmethodwassuccessfullyusedforunderstandi…  相似文献   

2.
InthisnoteLdenotesacompletelydistributivelatticewithanorder reversinginvolution .Forlatticetheoreticconceptswereferto [1 ].AnL fuzzytopologyonasetXisasubsetΔ LXwhichisclosedwithrespecttofiniteinfsandarbitrarysups.ΔiscalledstratifiedifΔcontainsalltheconsta…  相似文献   

3.
IntroductionPolyhydroxyalkanoates(PHAs)areafamilyofbiopolyestersynthesizedbymanybacteria[1,2 ] .AmongPHAs ,polyhydroxybutyrateorPHBisthemostcommonmember[3] .AttemptshavebeenmadetodevelopcommercialfermentationprocessesfortheproductionofPHAs[4 7] .Biopol,acommerci…  相似文献   

4.
Chitin ,whichmainlyconsistsof β(1→4 ) 2 acetamido 2 deoxy D glucopyranosestructuralunits ,isoneofthemostabundantformsofcarbohydratefoundinnature[1] .Recentdevelopmentshaveenabledtheuseofchitinandchitosaninvastlydiversefieldsrangingfromthemedicineandchemicali…  相似文献   

5.
YANG Yi 《清华大学学报》1999,4(3):1528-1531
IntroductionAminoacylase (N acylaminoacidamidohydrolase .EC 3.5.1.14 ) ,whichexistsinmammaliankidneysandmicroorganisms ,catalyzesthereversiblehydrolysisofL acylaminoacids[1] .Theenzymeisdimericwitharelativemolecularwassof86 0 0 0 ,containingoneZn2 ionpersubunitwhichis…  相似文献   

6.
ByapplyingahighdegreeofH2 -dilution ,nanocrystallinegermanium (nc -Ge :H)andsilicon (nc -si:H)canbegrownbyplasma -enhancedchemicalvapordeposition (PECVD)fromGeH4[1] .Majordifferences,however ,existbetweentheplasmainduceddepositionofger maniumandsilliconreflectinglar…  相似文献   

7.
IntelligentToolFailureMonitoringforMachiningProcesses¥WanJun,ZhaoFan,WuXieqhao,CatFuzhi万军,赵凡,伍星浩,蔡复之(DepartmentofPrecisionIns...  相似文献   

8.
LaboratoryAnimalMaintainedbyDepartmentOfLab .Animal,HealthScienceCenter,PekingUniversity品系名称(Strain)等级(Quality)遗传类别(Type)备注(Remark)MiceK .M 1、2远交LACA 1、2远交BALB/C 1、2、3近交C57BL/ 6J 1、2近交DBA/ 2 2近交ICR 3远交BXSB 2远交红斑狼疮模型Scid 3近交T、B联合缺陷小鼠NudeMiceICR nu 3远交T细胞缺陷裸小鼠BALB/C nu 3远交T细胞缺…  相似文献   

9.
ApplicationofCellularNeuralNetworkstoMapRecognition(Ⅰ)¥WuXinyu(DepartmentofBasicCources,NanjingInstituteofPostsandTelecommuni...  相似文献   

10.
Theabrasionresistanceofyarnsisveryimportantforthedownstreamprocessingandend use ;manyresearchworkscon cernedaboutthisaspecthavebeendone[1~ 17] .Although ,becauseofthedifferenceinstructuresandproperties ,thebehavioroftheabrasionresistanceofdifferentyarnsisdif…  相似文献   

设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号