Suchergebnisse

As the first international futures variety in China, crude oil futures, its price influence and function play has attracted much attention at home and abroad, from the perspective of market performance, crude oil futures have had a greater impact on the capital market since its launch, and what needs to be further studied is the quantitative degree and complexity of the impact of crude oil futures price fluctuations on stock market fluctuations. The daily data from March 26, 2018 to July 5, 2022 were selected to study the influence of domestic crude oil futures prices on domestic Shanghai and Shenzhen stock index by Granger causality, cointegration test and smooth transition regression model. The study shows that the price and yield of domestic crude oil futures have a one-way guiding effect on the domestic Shanghai and Shenzhen stock indexes and yields, but their guiding effect on the Shenzhen component index is greater than that of the Shanghai Composite Index. Domestic crude oil futures prices and Shanghai and Shenzhen stock indexes have a long-term similar negative cointegration relationship. The positive and negative impact of the domestic crude oil futures price yield on Shanghai and Shenzhen stock index yields is non-linear and asymmetrical, but the mechanism of impact on the two stock markets is different, for the Shanghai stock market, the negative impact of the crude oil futures price yield is greater than the positive shock impact, for the Shenzhen stock market, the positive impact of the crude oil futures price yield is greater than the negative shock impact, and the impact on both stock markets was limited .Therefore, for domestic crude oil futures to become the global crude oil price benchmark, they also need to be continuously improved in terms of national policies, industry supervision, exchange rules and market system construction.

The purpose of the research is to substantiate the specificity of male singing skills as the first and leading in the history of musical and cultural events and to formulate the fundamental methodological and singing differences in religious-ritual and theatrical-opera detections. The methodological basis is the intonation approach as an idea of the genetic commonality of musical thinking and speech in the traditions of the concepts of B. Asafiev and B. Yavorskyi in Ukraine, which is presented in the works of D. Androsova, O. Kozarenko, O. Markova, O. Ohanezova, O. Roshchenko, O. Sokolova, V. Shulhina. Scientific novelty is manifested in the independence of classification developments regarding the characteristics of male singers in the ritual-religious and theatre-opera spheres, for the first time in the musicology of Ukraine and China, it is pointed out the fundamental difference between the religious and ritual detection of singing, mostly male, in register-interval indicators, which are incompatible with speech detections as signs of materially-real sound experience. Conclusions. From the ritual-religious primacy comes the practice of focusing on the voice detection within the framework of ritual-religious actions of sounds associated with supernatural abilities of contact with the extra-human world, the basis of which is the male voice, able to master the registers accessible to women's vocal expression, which is later fixed in the falsetto singing of men, although the distinctive side of sacredness both in the West and in the East is the skill of male fables. The transcendental meaning of such ritual sound expression is reinforced by interval-register measures, among which either "drumming" on one or two sounds or interval-register "jumps" that remove the respiratory-speech "wave" line of pitch sequences prevail. Theatrically, the operatic approach, relying on the artificiality of vocals (as a legacy of European church practice) or its analogies in the Chinese singing tradition, metaphorically and consistently combines that singing artificiality with speech-pathetic inflections, i.e. compensatingly combining the experience of addressing the superphysical world with speech-physical sound signs.

AbstractOviductal extracellular vesicles (OEVs) play an important role in fertilization and embryo development. However, it remains largely unknown whether the size and protein cargo of OEVs change during the estrous cycle in mice. This study analyzed the changes in the size distribution and protein cargo of OEVs at four stages of the estrous cycle in mice. The distribution widths of OEVs according to the estrous cycle stage were as follows: proestrus, 20–690 nm in diameter, with two peaks at 50 and 250 nm; estrus, 22–420 nm in diameter, with two peaks at 40 and 200 nm; metestrus, 30–70 nm diameter, with a single peak at 40 nm; and diestrus, 10–26 nm diameter, with a single peak at 20 nm. The estrogen receptor (ER) level in OEVs at the proestrus stage differed significantly from that at estrus (P = 0.013) and diestrus (P = 0.005). The levels of CD9 and Hsc70 fluctuated across the four stages, although with no significant differences. Furthermore, OEVs were observed among the cilia and microvilli of epithelial cells at the proestrus, estrus, and diestrus stages, but not at the metestrus stage. The number of observed OEVs was the highest at the proestrus stage, followed by the estrus, and the diestrus stage. Endosomes were also observed at the estrus and diestrus stages. The change of the OEV size and ER cargo is associated with the estrous cycle in mice. Our findings increase the understanding of the physiological characteristics of OEVs, which may have clinical applications.