[quick news] like on July 31, 2019! Three gold and one silver! China team of International Chemistry Olympic Games takes the first place

Give the thumbs-up! Three gold and one silver! The Chinese team of the international chemical Olympiad hosts all the first international chemical Olympiad (IChO), usually for 10 days in late July of each year In 1968, the first IChO was held in Prague, Czechoslovakia Only three countries participated in the first IChO Since the establishment of IChO, it has been held for 50 consecutive times, and now it is the largest and most influential chemistry competition for middle school students in the world Chinese competitors entered for the first time in 1987 The 51st IChO was held in Paris, France, from July 21 to July 30, 2019, with more than 80 countries and regions participating The result of the competition came out The Chinese team won three gold and one silver medals and won the first place in the world The total score of he Liu in Hangzhou Xuejun middle school is the first in the world and the first in experiment, which has been sent to Peking University; the total score of Deng Zijie in Hebei Hengshui No 1 middle school is the second in the world and the first in theory China takes the lead! HTTPS: / / baijiahao Baidu COM / S? Id = 1640472062786086368 & Wfr = Spider & for = PC a fire accident happened in Nanchang chemical plant, which did not cause casualties 29 afternoon, Nanchang Jinsha chemical raw material Co., Ltd 9 According to preliminary understanding, most of the contents in the fire area are empty barrels Workers transferred several barrels of xylene found damaged in the iron barrels in the reservoir area to the empty barrel warehouse During the process of pouring them into the new barrels, a fire broke out, with an initial total area of 80-90 square meters In case of fire, the enterprise launched the emergency plan for the first time, organized personnel to carry out self rescue, and called the fire department for help After receiving the police, more than 20 fire trucks and more than 100 officers and fighters were dispatched to the scene As of 17:18 p.m., the open fire had been put out The accident did not cause casualties, and the specific cause is still under further investigation Https:// Japan has approved the experiment of cultivating human organs in animals According to the recent news on the website of British journal Nature, a research project of using animals to cultivate human organs has been supported by the Japanese government for the first time Although this research may eventually provide a new source for human organ transplantation, the ethical and technical barriers still need to be overcome for xenotransplantation Previously, Japan banned the growth of animal embryos containing human cells for more than 14 days, and banned the transfer of these embryos to the surrogate uterus But in March, Japan's Ministry of culture, science and technology set new rules to allow the cultivation of human organs in animals According to the new regulations, Nakai Nakai, a famous biologist at Tokyo University in Japan and Stanford University in the United States, approved the experiment plan Https:// Ministry of Education: it is not allowed to arrange students to practice in recreational places In recent years, with the joint efforts of colleges and universities, government agencies, enterprises and public institutions, social organizations and other employing units, the integration of industry, education and research has been deepened, and the practice of College Students has been carried out stably and the quality has been steadily improved At the same time, some colleges and universities do not pay enough attention to practice, lack of investment in practice funds, the construction of practice base is not standardized, and the organization and management of practice is not in place, which to some extent affects the overall improvement of talent training quality In order to further improve the quality of practice and safeguard the legitimate rights and interests of students, schools and practice units, the Ministry of education put forward relevant suggestions on strengthening and standardizing the practice management in Colleges and universities The opinion points out that universities and internship enterprises should provide students with necessary conditions, safe and healthy environment, and should not arrange students to practice in recreational places, charge students against rules, and detain students' property and certificates Http:// \ xwfb/gzdt \ gzdt/s5987/201907/t20190730 \ u392798.html the research team of Professor Yu Shuhong of University of science and technology of China has successfully developed a kind of macro scale cellulose based nanocomposite fiber material which is both strong and tough based on the strategy of natural biological fiber The researchers used high-strength bacterial nanocellulose as the reinforcement unit, and sodium alginate as the organic matrix, spinning the composite aqueous solution of the two in solution, to obtain the macro nano composite fiber with single orientation structure, whose tensile strength was initially improved The tensile strength of the macrofibers is 190 MPa, while the tensile strength of the nanocomposites is 420 MPa After that, they obtained macro artificial fiber materials with similar biological fiber structure through multi-stage spiral winding structure design The tensile strength continued to increase by 25%, while the fracture elongation and toughness increased by nearly 50% and 100%, respectively The final tensile strength and fracture elongation reached 535 MPa and 16%, respectively http://digitalpaper.stdaily.com/http_