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Rafinesque, in his "New Flora of North America," published in 1836, wrote (p. 6) as follows:"All species might have been varieties once, and many varieties are gradually becoming species by assuming constant and peculiar characters"; but farther on (p. 18) he adds,"except the original types or ancestors of the genus."

拉菲奈斯鸠在他1836年出版的《北美洲新植物志》第六页里写道:"一切物种可能曾经一度都是变种,并且很多变种由于呈现固定的和特殊的性状而逐渐变为物种";但是往下去到了18页他却写道:"原始类型、即属的祖先则属例外。"

With the 39 species nrDNA ITS sequence from Genbank and by using nrDNA ITS sequence information of our study 31 species, a phylogenetic analysis was carried out on 70 species of Paphiopedilum, and then the results have been analyzed with the results from RAPD molecular marker of 30 species, indicated that, we supported Kirasawa's system proposed in 1982 on Paphiopedilum that this genus can be divided into six subgenera.

基于 ITS 序列的数据对兜兰属70个种的研究,结合 RAPD 对于中国兜兰30个种的研究结果进行分析,支持唐沢耕司(1982)所提出的将兜兰属分为6个亚属的观点,其中产于中国的兜兰属植物可以划分为5个亚属;认为巧花兜兰不能并入海伦兜兰中,最多可以作为其变种处理,或者独立成种,隶属于兜兰亚属的 Paphiopedilum 兜兰组;不支持将文山兜兰并入巨瓣兜兰或者同色兜兰中,可以作为是其变种处理,隶属于 Concoloria 组。

The discovery of manuscript C, however, disproved this hypothesis, since this manuscript reproduces with exactness the greater part of the variants of B, even when they are obviously false, while the transcriber of this latter manuscript discharged his task with such scrupulous care that he even recorded variants which were meaningless.

发现的手稿里,然而,反驳这一假设,因为这与精确再现原稿的较大部分的B的变种,即使他们显然是虚假的,而后者transcriber本手稿履行其承担的任务,例如,他一丝不苟地照顾即使记录变种是毫无意义的。

Conclution: Aerogenesis variety strains type 14 are commonly exist in shandong province, they have high relevancy with E. coli O32 phenotype traits such as biochemical nature and antigen structure, which indicates we should pay attention to differential diagnosis on these two strains.

C14型产气变种菌株在我省普遍存在。C14型产气变种与大肠杆菌O32的生化特性和抗原结构等表型特性具有高度的相关性,提示在检验工作中应注重对两种菌株的鉴别诊断。

The results showed that (1)There are 15 species and one variety distributing in China and 13 speeies and one variety distributing in Generalized Hengduan Mountains Region, so that the region is the area where Aletris L. plants most densely distribute in East Asia and representative Aletris L. plants at a11 the evolution stages can be found.

结果表明,(1)中国共分布有粉条儿菜属植物15种1变种,而广义的横断山地区集中分布有13种1变种,是东亚粉条儿菜属植物分布最为集中的地区,而且包含该属植物各个进化阶段的代表。

Secondly, we will present some variants of the update semantics with dichotomic definition, and thus prove the frame soundness of some epistemic systems and conditional systems with respect to the variants.

其次,我们提出带两分定义的更新语义的某些变种,从而证明某些认知系统和条件句系统相对这些变种有框架可靠性。中山大学逻辑与认知研究所;中山大学哲学系

Turkestanica var.tuberculata by the scanning electron microscope was also observed after they were identified by light microscope in the bodies of cattle and sheep. Meanwhile the results of the integumental surface was compared with mat of O.turkestanica by Tang Chongti under electron microscope and analyzed them. By means of observing, comparing and analyzing, It showed that both of O. cheni and O. titrkestanica var.tuberculata were the same species, they might only be of different name with O. turkestanica or subspecies or geographical strain, primarily.

本试验对在黑龙江省牛、羊体内检出的在光镜下鉴定为土耳其斯坦东毕吸虫结节变种和程氏东毕吸虫的二种虫体进行了体表扫描电镜观察,同时与唐崇惕所作土耳其斯坦东毕吸虫体表扫描电镜结果进行了比较和分析,初步认定程氏东毕吸虫与土耳其斯坦东毕吸虫结节变种为同一种,与土耳其斯坦东毕吸虫可能是同物异名或为其亚种或地域株。

Re-sults:it was shown that Nano MgO had excellent germicidal efficacy to the Escherichia coli and Staphylococcus aureus.To such spore as Bacillus subtilis var.niger spore,Nano MgO also produced good germicidal effect.It was proposed that abrasiveness,alka-linity,electrostatic attraction,and oxidizing power of nano MgO all combined to promote these biocidal properties.

结果: ①纳米氧化镁能有效杀灭大肠杆菌,对枯草杆菌黑色变种芽孢也有显著的杀灭效果;②纳米氧化镁对金黄色葡萄球菌和枯草杆菌黑色变种芽孢有很好的抑菌作用;③纳米氧化物的磨蚀性、碱性、氧化性以及对微生物的静电吸附使它具有抑菌和杀菌作用。

Results Synergized by microwave under the power of 210W, chlorhexidine and benzalkonium bromide represented weak activity for killing Bacillus subtilis var. niger, glutaraldehyde and ortho-phthalaldehyde presented obvious enhanced activity.

结果 在微波输出功率为210W的协同作用下,低效消毒剂显现微弱杀枯草杆菌黑色变种芽胞活性,高效消毒剂杀枯草杆菌黑色变种芽胞的活性则显著增强。

Pathogenicity of 83 Curvularia isolates including 76 isolates from corn and 7 isolates from other hosts were tested in seedling and adult stage of corns. Among these species based on morphology, C. lunata, C. pallescens, C. lunate var. aeria, C. clavata and C. ovoidea could cause the typical Curvularia leaf spot symptom that lesions are grayish spots up to 1mm in diameter appear in the centers and straw-colored or chlorotic halos may surround the lesions.

以上方面的研究结果表明:通过形态鉴定,来自玉米弯孢菌叶斑病病害标样中的148株弯孢菌被鉴定为9个种和1个变种,即新月弯孢菌、苍白弯孢(C.pallescens)、新月弯孢菌气生变种(C.lunata var.aeria)、棒弯孢、C.ovoidea、不等弯孢(C.inaequalis)、塞河弯孢(C.senegalensis)、香茅弯孢(C.cymbopogonis)、Curvularia sp〓和Curvularia sp〓。

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