简介:WiththeaidofMullin-Rota'ssubstitutionrule,weshowthattheSheffertypedifferentialoperatorstogetherwiththedeltaoperatorsDandDcouldbeusedtoconstructapairofexpansionformulasthatimplyawidevarietyofsummationformulasinthediscreteanalysisandcombinatorics.Aconvergencetheoremisestablishedforafruitfulsourceformulathatimpliesmorethan20notedclassicalfomulasandidentitiesasconsequences.Numerousnewformulasarealsopresentedasillustrativeexamples.Finally,itisshownthatakindofliftingprocesscanbeusedtoproducecertainchainsof(∞m)degreeformulasform≥3withm≡1(mod2)andm≡1(mod3),respectively.
简介:benzothiazole衍生物的新系列被设计并且综合。最新综合的混合物对Escherichiacoli,葡萄球菌aureus和杆菌仙影拳为他们的抗菌剂活动被屏蔽。混合物6j和6o对E显示出最高的活动。coli和S。aureus。这些混合物的抗真菌的活动也对Candidaalbicans和曲霉属菌fumigatus被测试293。混合物4c,4g和6j对C展出了最高的活动。albicans。另外,混合物4a和6j对A显示了有希望的活动。fumigatus293。而混合物4a,6j和6p显示出中等活动,一样的混合物对ChromobacteriumviolaceumATCC12472为他们的察觉到antiquorum活动被检验。在里面综合混合物测试的vitrocytotoxicity对颈的癌症(Hela)和肾成纤维细胞癌症(COS-7)房间被执行线。结果显示所有测试混合物有IC50价值>50 ;对两根房间线的mol/L。分子的性质,毒性,药相似,和药获得混合物4a-c,5a,6g,h,6j,6l,6o和7c的侧面,d也被估计。
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简介:Dryseparationofironmineralfromlow-gradecoal-serieskaolininHubeiProvinceofChinawasinvestigated.ThestructureandchemicalcompositionofthekaolinoreweredeterminedbyX-raydiffraction(XRD)andX-rayFluorescence(XRF)analyses.Thenarrowparticlesizerangeclassification,drymagneticseparationandcalcinationwerecarriedouttoevaluatetheparticlesizedistribution,andtherelationbetweenthecontentofironandthewhiteness.Experimentalresultsrevealedthatthehighestcontentofiron(3.70%)inkaolinorewasintheparticlesizerangefrom60to74μm,andpyritewasthemainoccurrenceofironinthekaolinore.Drymagneticseparationshowedthattheremovalrateofironinkaolinorecouldbeincreasedobviouslyaftercalcination,andtherateofironremovalwas60%intheparticlesizerangefrom60to74μm.Aspyritecanbetransformedintohematitethroughcalcination,thermodynamicstudiesandXRDanalysisshowedthatthemaximumcontentofhematitewasobtainedat900℃,whichwouldbemorebeneficialtomagneticseparation.
简介:Inthispaper,weshowthatnewmodifieddoublecosinetrigonometricsumsintroducedin[1]areinappropriate,theclassofdoublesequencesJdintroducedthereisunusableforsuchsumsandconsequentlytheresultsobtainedinitarecompletelyincorrect.WehereintroduceappropriatemodifieddoublecosinetrigonometricsumsmakingtheclassJdusableconsideringaparticulardoublecosinetrigonometricseries.