نتایج جستجو برای: diversifications
تعداد نتایج: 176 فیلتر نتایج به سال:
The aim of this research is to develop and validate an experimental model testing method in the erhu instrument. analysis dependent on dynamic behavior materials which results relationships be naturally excited due structure. There are three major factors would directly affect performance vibroacoustic: (1) string, (2) vibrating skin, (3) wooden soundbox. However, transducer mass effect signifi...
We used the patch clamp technique to record from taste cells in thin transverse slices of lingual epithelium from Necturus maculosus. In this preparation, the epithelial polarity and the cellular organization of the taste buds, as well as the interrelationships among cells within the taste bud, were preserved. Whole-cell recording, combined with cell identification using Lucifer yellow, allowed...
Angiosperms and their flowers have greatly diversified into an overwhelming array of forms in the past 135 million years. Diversification was shaped by changes in climate and the biological environment (vegetation, interaction with other organisms) and by internal structural constraints and potentials. This review focuses on the development and structural diversity of flowers and structural con...
Evolutionary radiations are fascinating phenomena corresponding to a dramatic diversification of taxa and a burst of cladogenesis over short periods of time. Most evolutionary radiations have long been regarded as adaptive but this has seldom been demonstrated with large-scale comparative datasets including fossil data. Originating in the Early Jurassic, irregular echinoids are emblematic of th...
Function diversification in large protein families is a major mechanism driving expansion of cellular networks, providing organisms with new metabolic capabilities and thus adding to their evolutionary success. However, our understanding of the evolutionary mechanisms of functional diversity in such families is very limited, which, among many other reasons, is due to the lack of functionally we...
The Ordovician global cooling trend observed by several temperature proxies, which coincides with one of the most significant evolutionary diversifications on Earth, is yet to be fully understood. This study presents new simulations pCO2 and surface temperatures using a spatially resolved climate-carbon cycle Earth system model fed refined continental reconstructions estimates solid degassing. ...
This study was conducted in South Tapanuli District, which is one of the two oil palm centres implementing landscape management project. Data collected from Regional Plan documents and 169 smallholder samples analysed with Cross Tabulation Compare Means Test. The results show that has been implemented through Planning various regulations. However, many institutions are authorized to manage land...
Technological adaption and innovative activities foster small medium enterprises (SMEs) growth by allowing production process diversifications. Furthermore, open innovation practices, especially SMEs, rely on several firms’ specific attributes, their impact varies accordingly. This study’s motivation is to explore the of technological adaptation SMEs run women entrepreneurs challenges encounter...
We assembled genome-wide data from 16 prehistoric Africans. We show that the anciently divergent lineage that comprises the primary ancestry of the southern African San had a wider distribution in the past, contributing approximately two-thirds of the ancestry of Malawi hunter-gatherers ∼8,100-2,500 years ago and approximately one-third of the ancestry of Tanzanian hunter-gatherers ∼1,400 years...
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