On the Application of Fuzzy Decision Theory in Chemotherapy

1IntreductionTheliteratUreonmulti-Criteriondecisionmaking(MCDM)problemshas~tremendouslyintherecentpast.TwomajorareashaveevolvedwhiChbothconcentrateondecisionmakingwithseveralcriteria:multiobjectivedecisionmaking(MODM)andmulti-attributedecisionmaking(MADM).TheformerconcentratesoncontinuousdecisionspaceandthelatterfocusesonproblemswithdiscreteSPace.FuzzysettheoryhascontributedtoMODMproblemsaswellastheMADMProblems.ThegeneralMODMproblemcanbedeft.edLllasfollows:Twostagescangenerallybe…     

微藻生物技术新进展

微藻生物技术是较新的生物技术领域之一。藻的生物技术本质上与农业相同,即利用光合成机制生产生物量,用作食物、饲料、化学药品和能源。 培养微藻作生物量的主要优点为: 1.藻是很有效的生物系统,是以太阳能通过光合成生产有机化合物的。     

FT Ⅰ, a novel positive myeloid-lineage-specific transcription regulatory element within the mouse myeloperoxidase gene enhancer, En 1

INTanDUCTI0NMyeloidcelldifferentiati0n,inwhichmultip0tentialprogenitorcellsarec0nvertedint00neofthesixmaturedifferentiatedcells,i.e.,erythr0cytes,platelets(megakary-ocytes),macr0phages,neutr0phils,e0sinophilsandbas0phils,involvestemporalre-gulati0nofexpression0fanumberoflineage-anddifferentiationstage-specificgenes.Understandingthedevel0pmentalspecificationoflineageaJswellasmaturationstageassociatedpatterns0fgeneexpressioninmyel0idcelldifferentiationrequiresanin-sightintothecontrol0findivid…     

玫瑰茄光周期反应的研究

来源于泰国、中美洲、塞内加尔、印度和埃及的五个玫瑰茄品系,在光周期为8、16和24小时的人工气候室内生长。通过短日照和连续光照诱导开花证实,所有品系均为双光周期。各品系在花、果发育和由短日照转变到长日照后持续地成花诱导中显出差异。短日照和连续光照产生的生理效应和形态效应均不同。在每个叶腋的两个成对芽中,左芽在光周期为8和24小时成花,在光周期16小时保持休眠;右芽在8小时保持休眠,在16小时发育成营养枝,而在24小时发育成花枝。作者讨论了这些资料对亚热带条件下玫瑰茄育种和栽培的重要意义。     

微生态制剂在胃肠道疾病中的临床应用

微生态制剂(microbial ecological agents, MEA)是利用益生菌及其代谢产物而制成的一种药物制剂。MEA主要是通过补充有益的微生物来重建人体肠道内的菌群平衡,以治疗多种胃肠道疾病。现就近年来MEA在胃肠道中的作用机制,以及在防治炎症性肠病、与抗生素相关的腹泻、幽门螺杆菌感染和慢性肝病等疾病中的临床应用作一概述,为更好地开发和利用MEA治疗疾病奠定基础。     

固定化氧化亚铁硫杆菌培养条件对黄铁矾沉淀的影响

以聚乙烯醇-海藻酸钠复合材料为载体,Ca(NO3)2为交联剂对氧化亚铁硫杆菌进行包埋固定化。该固定化细胞的连续培养技术可以用于处理H2S、SO2,为了减少减少固定化细胞培养过程中带来许多不利效应的黄铁矾沉淀 (NH4Fe3(SO4)2(OH)6）,采取了改变初始pH值和目前普遍采用的9K培养基中的(NH4)2SO4浓度,K2HPO4浓度三种方法。结果显示：在三种方法中,降低(NH4)2SO4浓度是比较可行的一种方法,当(NH4)2SO4从3.0 g/L降低到0.5g/L,Fe2+氧化速率几乎没有受到影响,沉淀形成速率却减少了45%。在固定化细胞连续运行时,降低9K培养基中(NH4)2SO4的含量,当稀释率为0.4 h-1,运行时间为96 h,Fe2+氧化速率高达3.75 g/L.H,结果显示反应柱内沉淀明显减少,同时Fe2+氧化速率并没有明显变化。     

Isolation and functional analysis of a Brassica juncea gene encoding a com-ponent of auxin efflux carrier

Polar auxin transport plays a divergent role in plant growth and developmental processes including root and embryo development, vascular pattern formation and cell elongation. Recently isolated Arabidopsis pin gene family was believed to encode a component of auxin efflux carrier (G(?)lweiler et al, 1998). Based on the Arabidopsis pin1 sequence we have isolated a Brassica juncea cDNA (designated Bjpin1), which encoded a 70-kDa putative auxin efflux carrier. Deduced BjPIN1 shared 65% identities at protein level with AtPINl and was highly homologous to other putative PIN proteins of Arabidopsis (with highest homology to AtPIN3). Hydrophobic analysis showed similar structures between BjPINl and AtPIN proteins. Presence of 6 exons (varying in size between 65 bp and 1229 bp) and 5 introns (sizes between 89 bp and 463 bp) in the genomic fragment was revealed by comparing the genomic and cDNA sequences. Northern blot analysis indicated that Bjpin1 was expressed in most of the tissues tested, with a relatively h     

Sambunigrin and cyanogenic variability in populations of Sambucus canadensis L. (Caprifoliaceae)

The presence or absence of cyanogenic glycosides was determined for individuals from nine populations of Sambucus canadensis L. (elderberry) of east-central Illinois. In most of the populations tested, all or most of the individuals did not produce these compounds, in one, all were cyanogenic, whereas in another population this trait was highly variable. Addition of the enzyme emulsin to negative tests did not result in any further release of cyanide. The glycoside responsible is (S)-sambunigrin.     

The use of basis functions in modelling joint articular surfaces: application to the knee joint

This article introduces a new method to represent bone surface geometry for simulations of joint contact. The method uses the inner product of two basis functions to provide a mathematical representation of the joint surfaces. This method guarantees a continuous transition in the direction of the surface normals, an important property for computation of joint contact. Our formulation handles experimental data that are not evenly distributed, a common characteristic of digitized data of musculoskeletal morphologies. The method makes it possible to represent highly curved surfaces, which are encountered in many anatomical structures. The accuracy of this method is demonstrated by modeling the human knee joint. The mean relative percentage error in the representation of the patellar track surface was 0.25% (range 0-1.56%) which corresponded to an absolute error of 0.17mm (range 0-0.16mm).