During C.elegans development, microRNAs (miRNAs) function as molecular cashel tail bag switches that define temporal gene expression and cell lineage patterns in a dosage-dependent manner.It is critical, therefore, that the expression of miRNAs be tightly regulated so that target mRNA expression is properly controlled.The molecular mechanisms that
Spectroscopy is an efficient and widely used quantitative analysis method.In this paper, a spectral quantitative analysis model with combining wavelength selection and topology structure optimization is proposed.For the proposed method, backpropagation neural network is adopted for building the component prediction model, and the simultaneousness o
Abstract Background Gene flow between species, across ploidal levels, and even between evolutionary lineages is a common phenomenon in the genus Arabidopsis.However, apart from two genetically fully stabilized allotetraploid species that have been investigated in detail, the extent and temporal dynamics of hybridization are not well understood.An i
Although the Parmenidean poem (late 6th-early 5th centuries BCE) is in epic meter and teems with vivid acure face lotion imagery, it has been translated into the domain of philosophy since its earliest reception.Within this domain it has traditionally been interpreted as the first "explicit and self-conscious argumentation" of western philosophy (G
Some imbalance and balance postures of a passive quadruped robot with a simplified mathematical model are studied.Through analyzing the influence of the touchdown angle of the rear leg on the posture of the trunk during the flight phase, the stability criterion is concluded: the closer are the two moments which are the zero time of the pitching ang