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1.
跗线螨亚科三新种和一新纪录(蜱螨亚纲:跗线螨科)   总被引:1,自引:1,他引:0  
本文记述跗线螨亚科3个新种:修复奇跗线螨Xenotarsonemus xiufui sp.nov.,开本跗线螨 Tarsone-mus kaibeni sp.nov.,宗辉跗线螨 Tarsonemus zonghuii sp.nov.和1个中国新纪录:Steneotarsonemus vasilje-vae Sharonov,1983.  相似文献   

2.
本文记述福建省跗线螨亚科四新种:三毛新狭跗线螨Steneotarsonemus(Neosteneolarsonemus)trisetus、锐角狭跗线螨Steneotarsonemus(Steneotarsonemus)acricorn、矛形跗线螨Tarsonemus lancealus和单爪跗线螨 Tarsonemus uniunguis,spp.nov.  相似文献   

3.
本文报道福建省长乐县一新种:感觉奇跗线螨Xenotarsonemus sensus sp.nov.,采自榕树落叶层。  相似文献   

4.
记述采自广西大明山的曲跗湿螨属一新种:大明山曲跗湿螨A tractides(A tractides)damingshanensis Wang et Jin sp.nov.。新种与勐腊曲跗湿螨A.(A.)menglaensis Jin,1997相似,但EpⅣ后缘与前殖片距离较近,肛孔后于Ⅴ2之间的连线,而后者与前殖片距离较远、肛孔与Ⅴ2之间的连线在同一直线上。模式标本保存于贵州大学昆虫研究所。  相似文献   

5.
辣椒品种对侧多食跗线螨的抗性鉴定方法研究   总被引:2,自引:0,他引:2  
以11份辣椒品种作为试材,采用田间种群密度、叶片危害指数分级、单位面积叶绿素比值和螨量比值作为抗性指标评价了辣椒品种对侧多食跗线螨Polyphagotarsonemus latus(Banks)的抗性.结果表明:4种鉴定方法对侧多食跗线螨的鉴定结果总体趋势一致.叶片危害指数与螨量比值呈线性正相关(r=0.943**,y=0.191 7x+0.096 8),叶片危害指数法与螨量比值法鉴定结果吻合率达到72.7%.叶片危害指数法和螨量比值法可以作为评价辣椒品种对侧多食跗线螨抗性的2种方法.  相似文献   

6.
在福州稻田采到一种跗线螨,经鉴定属于跗线螨属(Tarsonemus Canest rini et Fan-zago,1876)的一新种。模式标本保存于福州环城区农林局。下文中长度单位为微米。福州跗纯螨 Tarsonemus fuzhouensis Lin et Zhang,新种。雄成螨(图一):体长167,体宽92。颚体长25,宽23,包含咽部。须肢略超出口腔。躯体卵形,长142,后足体区最宽,为92。前足体背板骨化弱,亚三角形。前足体背板和后  相似文献   

7.
在福州稻田采到一种跗线螨,经鉴定属于跗线螨属(Tarsonemus Canestrini et Fanzago,1876)的一新种。模式标本保存于福州环城区农林局。下文中长度单位为微米。福州跗线螨Tarsonemus,fuzhouensis Lin et Zhang,新种。雄成螨(图一):体长167,体宽92。颚体长25,宽23,包含咽部。须肢略超出口腔。躯体卵形,长142,后足体区最宽,为92。前足体背板骨化弱,亚三角形。前足体背板和后半体上背毛长度如下:前顶毛21,后顶毛12,前胛毛51,后胛毛17,前侧毛25,后侧毛20,  相似文献   

8.
棘螨属Gnorimus是巴基斯坦Chaudhri 1975建立的,隶属于植绥螨科Phytoseiidae,棘螨亚科Gnoriminae,截至目前为止,该属仅记录一种。1981年福建省采到一种捕食稻鞘跗线螨的天敌,经鉴定为棘螨属Gnorimus一新种。兹记述如下(文中测量长度的单位为微米)。新种模式标本保存于广东省昆虫研究所,部分副模标本保存于福建农学院生物防治研究所。  相似文献   

9.
棘螨属 Gnorimus 是巴基斯坦 Chaudhri 1975建立的,隶属于植绥螨科 Phytoseii-dae,棘螨亚科 Gnoriminae,截至目前为止,该属仅记录一种。1981年福建省采到一种捕食稻鞘跗线螨的天敌,经鉴定为棘螨属 Gnorimus 一新种。兹记述如下(文中测量长度的单位为微米)。新种模式标本保存于广东省昆虫研究所,部分副模标本保存于福建农学院生物防治研究所。  相似文献   

10.
江镇涛 《江西科学》1994,12(2):118-122
记述的新种是中国食粉螨Aleuroglyphuschinensissp.nov.新记录属是尾囊螨属Histiogaster,新记录种是巴克尾囊螨H.bacchusZakhvatkin。文内测量单位为μm,新种模式标本和新记录标本保存在江西大学生物学系。  相似文献   

11.
Language markedness is a common phenomenon in languages, and is reflected from hearing, vision and sense, i.e. the variation in the three aspects such as phonology, morphology and semantics. This paper focuses on the interpretation of markedness in language use following the three perspectives, i.e. pragmatic interpretation, psychological interpretation and cognitive interpretation, with an aim to define the function of markedness.  相似文献   

12.
何延凌 《科技信息》2008,(4):258-258
Language is a means of verbal communication. People use language to communicate with each other. In the society, no two speakers are exactly alike in the way of speaking. Some differences are due to age, gender, statue and personality. Above all, gender is one of the obvious reasons. The writer of this paper tries to describe the features of women's language from these perspectives: pronunciation, intonation, diction, subjects, grammar and discourse. From the discussion of the features of women's language, more attention should be paid to language use in social context. What's more, the linguistic phenomena in a speaking community can be understood more thoroughly.  相似文献   

13.
王慧 《科技信息》2008,(10):240-240
Wuthering Heights, Emily Bronte's only novel, was published in December of 1847 under the pseudonym Ellis Bell. The book did not gain immediate success, but it is now thought one of the finest novels in the English language. Catherine is the key character of this masterpiece, because everybody and everything center on her though she had a short life. We can understand this masterpiece better if we know Catherine well.  相似文献   

14.
The Williston Basin is a significant petroleum province, containing oil production zones that include the Middle Cambrian to Lower Ordovician, Upper Ordovician, Middle Devonian, Upper Devonian and Mississippian and within the Jurassic and Cretaceous. The oils of the Williston Basin exhibit a wide range of geochemical characteristics defined as "oil families", although the geochemical signature of the Cambrian Deadwood Formation and Lower Ordovician Winnipeg reservoired oils does not match any "oil family". Despite their close stratigraphic proximity, it is evident that the oils of the Lower Palaeozoic within the Williston Basin are distinct. This suggests the presence of a new "oil family" within the Williston Basin. Diagnostic geochemical signatures occur in the gasoline range chromatograms, within saturate fraction gas chromatograms and biomarker fingerprints. However, some of the established criteria and cross-plots that are currently used to segregate oils into distinct genetic families within the basin do not always meet with success, particularly when applied to the Lower Palaeozoic oils of the Deadwood and Winnipeg Formation.  相似文献   

15.
理论推导与室内实验相结合,建立了低渗透非均质砂岩油藏启动压力梯度确定方法。首先借助油藏流场与电场相似的原理,推导了非均质砂岩油藏启动压力梯度计算公式。其次基于稳定流实验方法,建立了非均质砂岩油藏启动压力梯度测试方法。结果表明:低渗透非均质砂岩油藏的启动压力梯度确定遵循两个等效原则。平面非均质油藏的启动压力梯度等于各级渗透率段的启动压力梯度关于长度的加权平均;纵向非均质油藏的启动压力梯度等于各渗透率层的启动压力梯度关于渗透率与渗流面积乘积的加权平均。研究成果可用于有效指导低渗透非均质砂岩油藏的合理井距确定,促进该类油藏的高效开发。  相似文献   

16.
As an American modern novelist who were famous in the literary world, Hemingway was not a person who always followed the trend but a sharp observer. At the same time, he was a tragedy maestro, he paid great attention on existence, fate and end-result. The dramatis personae's tragedy of his works was an extreme limit by all means tragedy on the meaning of fearless challenge that failed. The beauty of tragedy was not produced on the destruction of life, but now this kind of value was in the impact activity. They performed for the reader about the tragedy on challenging for the limit and the death.  相似文献   

17.
正The periodicity of the elements and the non-reactivity of the inner-shell electrons are two related principles of chemistry,rooted in the atomic shell structure.Within compounds,Group I elements,for example,invariably assume the+1 oxidation state,and their chemical properties differ completely from those of the p-block elements.These general rules govern our understanding of chemical structures and reactions.Using first principles calcula-  相似文献   

18.
We have developed an adiabatic connection to formulate the ground-state exchange-correlation energy in terms of pairing matrix linear fluctuations.This formulation of the exchange-correlation energy opens a new channel for density functional approximations based on the many-body perturbation theory.We illustrate the potential of such approaches with an approximation based on the particle-particle Random Phase Approximation(pp-RPA).This re-  相似文献   

19.
正The electronic and nuclear(structural/vibrational)response of 1D-3D nanoscale systems to electric fields gives rise to a host of optical,mechanical,spectral,etc.properties that are of high theoretical and applied interest.Due to the computational difficulty of treating such large systems it is convenient to model them as infinite and periodic(at least,in first approximation).The fundamental theoretical/computational problem in doing so is that  相似文献   

20.
For molecular systems,the quantum-mechanical treatment of their responses to static electromagnetic fields usually employs a scalar-potential treatment of the electric field and a vector-potential treatment of the magnetic field.Although the potential for each field separately is associated with the choice of an(unphysical)origin,the precise choice of the origin for the electrostatic field has little consequences for the results.This is different for the  相似文献   

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