Pesticide interaction creates hybrid residue

When applied in combination, the herbicides N-(3,4-dichlorophenyl)-propionamide (propanil) and N-(3-chloro-4-methylphenyl)-2-methyl-pentanamide (solan) were transformed in soil to an unexpected residue-asymmetric 3,3',4-trichloro-4'-methylazobenzene. Each herbicide contributed one-half of the asymmetric azobenzene molecule.     

Anomalous sounds from the entry of meteor fireballs

A very bright fireball observed over New South Wales in 1978 produced anomalous sounds clearly audible to some of the observers. An investigation of the phenomenon indicates that bright fireballs radiate considerable electromagnetic energy in the very-low-frequency (VLF) region of the spectrum. A mechanism for the production of VLF emissions from the highly energetic wake turbulence of the fireball is proposed. Trials with human subjects revealed a very extended range of thresholds for the perception of electrically excited sounds among a sample population, particularly when the VLF electric field excites surface acoustic waves in surrounding objects. This fact, together with variable propagation effects and local conditions, can account for the sporadic distribution of reports of anomalous sounds from fireballs and auroras.     

Neural processing of backwards-speech sounds

When sounds such as those produced by reverse playback of recorded speech are presented to left and right ears of normal subjects, the sounds arriving at the right ear are more accurately identified than those arriving at the left. These findings are comparable to the right-ear superiority demonstrated with normal speech sounds, and contrast with the left-ear superiority for musical and other non-speech sounds. It is suggested that the neural mechanisms underlying the perception of speech and non-speech sounds are not differentiated along the dimension of conceptual content.     

行使沉默权是否意味着放弃自我辩护

沉默权是国内法学界研究的热点问题,虽然1996年《刑事诉讼法》最终未接受沉默权,但1998年10月5日秦华荪代表我国政府在《公民权利和政治权利国际公约》上签字,再次激发了对沉默权的研究。在对我国是否引进沉默权展开研究的同时,一种观点认为行使沉默权就是放弃自我辩护权。本文就此问题进行一些探讨。1　对辩护权和沉默权之间的关系存在误解1.1　对辩护和陈述之间的关系存在误解　汤啸天认为:“凡是正确的辩护、辩解都是建立在坦言事实真相的基础之上的。”也就是说正确的辩护、辩解都是建立在被追诉人陈述事实真相的基础上,否则,就是不…     

Perceptual restoration of missing speech sounds

When an extraneous sound (such as a cough or tone) completely replaces a speech sound in a recorded sentence, listeners believe they hear the missing sound. The extraneous sound seems to occur during another portion of the sentence without interfering with the intelligibility of any phoneme. If silence replaces a speech sound, the gap is correctly localized and the absence of the speech sound detected.     

唢呐长音的几种训练方法

长音练习之重要好比万丈高楼之根基,根基稳了才能顺利到达顶峰。长音的练习是所有管乐器学习者的必修课程,无论是初学者还是本领域的演奏家,长音的练习要伴随他们演奏生涯的始终,就可见其重要性。本文根据笔者的学习与教学经验系统的谈了唢呐长音的几种训练方法,以期得到同仁们的重视。