Ke Ji Ri Bao
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人类基因组中发现新的突变热点
Ke Ji Ri Bao· 2025-11-26 00:25
Core Insights - A new class of mutation-prone regions has been discovered in the human genome, particularly at transcription start sites, which has significant implications for understanding genetics and disease [1][2] - The probability of mutations occurring in the first 100 base pairs after transcription start sites is 35% higher than random mutation rates, highlighting the functional importance of these regions [1] - Many additional mutations occur during the initial rounds of cell division post-fertilization, known as mosaic mutations, which may be asymptomatic in parents but can be passed to offspring [1] Group 1 - The research was led by the Barcelona Genome Regulation Centre and published in Nature Communications, analyzing 150,000 human genomes and 75,000 transcription start sites [2] - Genes associated with cancer, brain function, and limb development are particularly affected by these mutation hotspots [2] - Natural selection appears to filter out harmful mutations over generations, leading to a decrease in the prevalence of these mutations in families with affected genes [2] Group 2 - Current mutation models used by geneticists may overlook these mutation hotspots, leading to incorrect conclusions about expected mutation rates in specific genomic regions [2] - For instance, a model might predict 10 mutations in a region, while 50 are observed, indicating a significant blind spot in existing methodologies [2]
新AI模型可精准锁定人体致病突变
Ke Ji Ri Bao· 2025-11-26 00:25
Core Insights - Harvard Medical School and the Barcelona Genomic Regulation Center have developed an AI model named popEVE, which can accurately identify disease-causing mutations in human proteins, potentially transforming the diagnosis of genetic diseases [1][2]. Group 1: Model Development - popEVE is based on evolutionary data from hundreds of thousands of different species and genetic variation information from the entire human population, allowing it to analyze over 20,000 human proteins to identify pathogenic mutations and rank their severity [1]. - The model innovatively combines evolutionary data with resources from the UK Biobank and genomic aggregation databases, enabling it to calibrate disease predictions based on gene variations found in healthy populations [2]. Group 2: Model Validation and Performance - To validate its effectiveness, the team analyzed genetic data from over 31,000 families with children suffering from severe developmental disorders, where popEVE identified the most destructive mutations in 98% of cases, outperforming advanced tools like AlphaMissense [2]. - In the search for new pathogenic genes, popEVE discovered 123 genes previously thought unrelated to developmental disorders, with 104 of these appearing in only a few cases [2].
流感季 专家支招:如何恰当使用抗病毒药物
Ke Ji Ri Bao· 2025-11-26 00:19
Core Viewpoint - The article highlights the significant increase in sales of antiviral medications Oseltamivir and Baloxavir due to a rising flu season in China, with sales growth exceeding 100% as flu activity escalates nationwide [1]. Group 1: Flu Activity and Medication Sales - The flu season in China is currently experiencing a rapid increase in activity, with expectations for further escalation [1]. - Sales data indicates a notable rise in demand for antiviral drugs Oseltamivir and Baloxavir, both of which are effective against current flu strains [1]. Group 2: Appropriate Use of Antiviral Medications - Experts emphasize the importance of confirming the pathogen before administering antiviral medications, as some common cold symptoms may be caused by viruses that these medications do not affect [2][3]. - Early treatment is encouraged for confirmed flu infections, ideally within 48 hours of symptom onset for optimal effectiveness [3]. Group 3: Preventive Use and Recommendations - Oseltamivir can be used for prevention in individuals at risk, such as those who have been in close contact with flu patients, but should not be used as a preventive measure after symptoms appear [4]. - Different populations have varying requirements for preventive medication, with high-risk individuals advised to start treatment promptly after exposure [4]. Group 4: Diagnostic Tools and Limitations - Rapid test kits available in pharmacies can assist in initial flu diagnosis but may yield false negatives, necessitating further confirmation through nucleic acid testing if symptoms persist [5][6]. - The sensitivity of antigen tests is lower than that of nucleic acid tests, and negative results do not rule out flu infection, especially in high-risk groups [6].
宁夏银川:外脑智库助力打造“中国新硅都”
Ke Ji Ri Bao· 2025-11-26 00:16
Core Insights - Yinchuan is positioning itself as "China's New Silicon Valley," focusing on the development of a silicon-based industry cluster primarily for photovoltaic and semiconductor materials [2][3] - The silicon-based industry in Yinchuan contributes significantly to the region's economy, accounting for nearly 60% of local enterprises, 70% of R&D investment, and 80% of output value, with a cumulative industrial output of 130 billion yuan over the past three years [2] - Challenges remain in the industry, including small scale, incomplete industrial chains, and the need for enhanced innovation capabilities [2][4] Industry Development - The Yinchuan government and Ningxia Association for Science and Technology are collaborating with experts to enhance the local silicon industry through targeted support and technology transfer [2][4] - A series of activities have been initiated to address technical needs from local enterprises, with 102 technical demands collected and 75 technical issues resolved for 50 companies [4][5] - The establishment of national-level service stations and technology service agreements aims to foster long-term cooperation and continuous support for industry development [4][6] Technological Innovation - The focus on technological innovation is seen as crucial for reducing costs and enhancing efficiency in the semiconductor sector, with experts providing insights on effective development paths [3][6] - Companies are encouraged to leverage technology advancements and partnerships to integrate more deeply into the semiconductor and photovoltaic supply chains [6]
寻找“地球2.0”
Ke Ji Ri Bao· 2025-11-26 00:15
Core Viewpoint - The Chinese Academy of Sciences announced plans for a space exploration satellite aimed at finding Earth-like exoplanets, referred to as "Earth 2.0," during the latest highlights release of the space science pilot project on November 24 [1] Group 1: Importance of Finding "Earth 2.0" - The search for "Earth 2.0" is driven by human curiosity about the existence of life beyond Earth and the potential for finding a backup home for humanity amid existential threats like resource depletion and climate change [2] - Discovering "Earth 2.0" could provide insights into Earth's past and future, and answer philosophical questions about humanity's uniqueness in the universe [2] Group 2: Criteria for "Earth 2.0" - "Earth 2.0" must meet strict criteria, including being a rocky planet with a radius between 0.8 to 1.25 times that of Earth, ensuring a solid surface and a stable atmosphere [3] - It should orbit a sun-like star within the habitable zone to maintain liquid water, with a suitable atmosphere to filter harmful radiation and support life [3] Group 3: Current Discoveries in Exoplanet Research - The Kepler Space Telescope has discovered over 6,000 exoplanets, but none have been found that are both Earth-sized and within the habitable zone [4] - Significant milestones in exoplanet discovery include the first confirmed exoplanets in 1992 and the identification of Kepler-186f as the first Earth-sized planet in the habitable zone in 2014 [5] - China's contributions to exoplanet research include the discovery of "super-Earth" Kepler-725c, which is about ten times the mass of Earth, showcasing advancements in astronomical detection techniques [5]
“量子骗局”层出不穷,如何辨别真科技与伪概念
Ke Ji Ri Bao· 2025-11-25 05:49
Core Viewpoint - The rise of various scams labeled as "quantum" products has misled many consumers, particularly the elderly, highlighting the need for public awareness and education on the true nature of quantum technology [1][2]. Group 1: Nature of Quantum Technology - Quantum technology is based on the study of micro-particles like electrons and photons, and its phenomena exist only under strict conditions, making it unsuitable for everyday applications [1]. - Key characteristics of quantum technology include: 1. Strict environmental dependencies requiring ultra-low temperatures and high precision [1]. 2. High investment and expertise needed, with experimental setups costing from hundreds of thousands to millions [1]. 3. Specific application scenarios, primarily in research labs, far from general consumer products [1]. Group 2: Characteristics of Quantum Scams - Common tactics in quantum scams include: 1. "Terminology grafting," where terms like "energy" and "magnetic field" are combined with "quantum" to create unverifiable claims [2]. 2. "Authority fabrication," involving fake certifications and endorsements from non-existent organizations [2]. 3. "Case fabrication," where unverifiable success stories are presented without real medical documentation [2]. Group 3: Public Awareness and Prevention - Public education is crucial in preventing quantum scams, serving as the first line of defense by bridging the information gap and helping the public understand quantum technology [3]. - A practical guide for identifying scams includes recognizing that any product claiming to solve everyday issues through quantum technology is likely fraudulent [3]. - In case of suspected scams, individuals should retain evidence and report to local authorities, as legitimate scientific breakthroughs are typically announced by credible institutions [3].
卫星物联网业务商用试验启动 填补通信空白,拓展低空经济应用场景
Ke Ji Ri Bao· 2025-11-25 05:46
Core Insights - The Ministry of Industry and Information Technology has officially launched a two-year commercial trial for satellite IoT services, aiming to enrich the satellite communication market, stimulate market vitality, enhance service capabilities, and establish a safety regulatory system [1] Group 1: Understanding Satellite IoT - Satellite IoT utilizes satellite communication technology to provide data collection and transmission services for a vast array of IoT devices across ground, ocean, and air [2] - It offers wide-area IoT connectivity for various terminals, including data collection terminals, wearable devices, handheld terminals, and transportation vehicles like cars, ships, and aircraft [2] - Satellite IoT addresses communication gaps in remote areas, sky, and ocean where traditional terrestrial networks cannot reach, providing global coverage [2] Group 2: Role in Emerging Industries - Satellite IoT can achieve global real-time tracking and data transmission for low-altitude aircraft, addressing communication shortcomings in the low-altitude economy [3] - In sectors like drone logistics, satellite IoT mitigates issues of signal interruption due to insufficient ground station coverage, enhancing flight safety and efficiency [3] - The technology is expected to attract more capital and resources into the low-altitude sector, promoting collaborative development across the drone manufacturing, airspace management, and data service industries, creating a virtuous cycle of "technology-scenario-industry" [3] Group 3: Future Development of "Internet of Everything" - China's satellite communication sector has accelerated, with recent policy initiatives aimed at optimizing business access and promoting industry development [4] - Major telecom companies, including China Telecom, China Mobile, and China Unicom, have obtained operational qualifications for satellite mobile communication, enabling services like direct satellite connections for emergency communications and remote area connectivity [4] - China Telecom has launched a trial for its "Tiantong + Beidou" domestic satellite-based high-precision positioning service, targeting areas with weak or no network coverage, enhancing support for scenarios like drone inspections and low-altitude navigation [4]
柔性晶硅-钙钛矿叠层电池效率创世界纪录
Ke Ji Ri Bao· 2025-11-25 04:33
Core Insights - Longi Green Energy Technology Co., Ltd. has developed a commercial-sized flexible tandem solar cell with an efficiency of 29.8%, certified by the Fraunhofer Institute for Solar Energy Systems, marking a world record for this type of cell [1][2] Group 1: Technology Development - The silicon-perovskite tandem solar cell technology significantly enhances theoretical efficiency by integrating two semiconductor materials, recognized as the next generation of photovoltaic technology [1] - The research team reduced the silicon wafer thickness to 60 micrometers, allowing for flexibility with a bending radius of less than 2 centimeters without breaking [1] - A dual-layer buffer structure was innovatively constructed, featuring a loose layer that absorbs mechanical stress and a dense layer that ensures efficient charge transport, resolving the conflict between stress buffering and high-efficiency transmission [1] Group 2: Product Specifications - The ultra-thin flexible tandem device, with a thickness of only 60 micrometers, achieves nearly 30% conversion efficiency, can be folded, has a bending radius of just 1.5 centimeters, weighs less than 4.4 grams, and boasts a power density of 1.77 watts per gram [2] - Laboratory small-area device efficiency has been certified by the U.S. National Renewable Energy Laboratory at 33.4% [2] Group 3: Market Implications - This breakthrough lays the foundation for the commercial development of flexible silicon-perovskite tandem solar cells in lightweight, high-power photovoltaic applications such as space and automotive solar energy [2]
【科技日报】我国启动聚变领域国际科学计划
Ke Ji Ri Bao· 2025-11-25 02:47
中国科学院合肥物质科学研究院副院长、等离子体所所长宋云涛表示:"今天发布这个计划,意味 着有更多国际科学家和中国聚变科学家携手合作,共同为解决人类未来能源的核心科学和工程问题而努 力。" (原载于《科技日报》 2025-11-24 01版) 核聚变能,通过模拟太阳的聚变反应释放能量,被认为是人类的"终极能源"。BEST装置,是我国 新一代"人造太阳"。根据研究计划,该装置将于2027年底建成,随后进行氘氚燃烧等离子体实验研究, 验证其长脉冲稳态运行能力,力求聚变功率达到20兆瓦至200兆瓦,实现产出能量大于消耗能量,并力 争在2030年演示聚变能发电。 据了解,此次中国科学院合肥物质科学研究院等离子体物理研究所(以下简称"等离子体所")牵头 发起燃烧等离子体国际科学计划,中欧聚变研究团队面向全球共同发布BEST研究计划,希望进一步整 合国际聚变领域的合作资源,凝聚国际聚变科学家智慧,通过设立开放科研基金、组织国际学术会议、 搭建联合实验平台、建设国际化人才队伍等方式,围绕聚变物理前沿问题开展合作研究。 24日,中国科学院"燃烧等离子体"国际科学计划项目在安徽合肥未来大科学城BEST装置大厅正式 启动,紧凑型聚 ...
【科技日报】中国空间科学创新发展进入“快车道”
Ke Ji Ri Bao· 2025-11-25 02:15
Core Insights - The National Space Science Center of the Chinese Academy of Sciences announced significant scientific breakthroughs in space science, marking a historic leap for China's space science innovation and positioning it as a leader in certain fields [1][5]. Group 1: Achievements and Innovations - Since its launch in 2011, the space science initiative has successfully developed and launched eight scientific satellites, achieving numerous original results and setting multiple records in China and globally [2]. - The "Tian Guan" satellite created the world's first X-ray all-sky map, while the "Wu Kong" satellite provided the most precise cosmic ray energy spectrum to date [2]. - The "Hui Yan" satellite directly measured the universe's strongest magnetic fields and detected high-speed jets near black holes, showcasing advancements in extreme condition measurements [2][3]. Group 2: International Collaboration - The initiative has fostered new paradigms of international cooperation, including the "Tian Guan" satellite project, which involved collaboration with the European Space Agency and other European countries [4]. - The "Wei Xiao" satellite project represents a comprehensive collaboration between China and Europe, covering all phases from design to data analysis [4]. Group 3: Future Plans - The National Space Science Center plans to focus on major frontier issues such as the origins of the universe, space weather, and life, with upcoming projects including the "Hong Meng Plan" and "Kua Fu II" [4]. - The goal is to achieve breakthroughs in areas like the dark ages of the universe and exoplanet detection during the 14th Five-Year Plan period [4].