Ke Ji Ri Bao

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【科技日报】中国空间站完成空间生命科学在轨实验任务
Ke Ji Ri Bao· 2025-08-26 00:50
Core Insights - The Tianzhou-9 cargo spacecraft successfully delivered 23 scientific experiments to the Chinese space station, with significant progress reported in life sciences experiments [1][2] - Three life science experiments involving liver cells, skeletal muscle precursor cells, and brain organoid chips have been completed, demonstrating the potential advantages of nucleic acid drugs in microgravity environments [1][2] Group 1: Life Sciences Experiments - The experiments have successfully achieved automated culture, in-orbit drug administration, microscopic imaging, and sample fixation [1] - In microgravity, the uptake efficiency of nucleic acid drugs by cells significantly increased, leading to a rapid decrease in disease-related protein expression levels, indicating superior therapeutic effects compared to ground control experiments [1][2] Group 2: Skeletal Muscle and Brain Research - Research on the impact of microgravity on skeletal muscle precursor cell migration indicates that migration is hindered, potentially affecting muscle regeneration and homeostasis [2] - The study using organ-on-a-chip technology shows that brain organoids can be cultured in 3D for extended periods in space, with faster neuronal migration observed compared to ground conditions [2] Group 3: Overall Scientific Achievements - As of August 22, 2025, the Chinese space station has implemented 58 scientific and application projects, conducting over 26,000 experiments and transporting more than 800 kilograms of scientific materials [2] - A total of 27 types of space science experiment samples have been returned, yielding 110 terabytes of scientific data [2]
“光子折纸”技术可在芯片上折叠玻璃
Ke Ji Ri Bao· 2025-08-26 00:30
这一新技术将二氧化硅光子学带入了三维世界,为开发高性能集成光学器件开辟了全新可能。 就像大型3D打印机可以制造几乎任何家居用品一样,"光子折纸"技术也能制造各种微型光学器件。例 如,它可以制造微型变焦镜头,从而取代大多数智能手机上配置的5个独立摄像头;也可以制造利用光 而非电的微光子元件,推动传统电子计算机向更快、更高效的光学替代方案转变。 团队在硅芯片上沉积超薄二氧化硅玻璃片,通过刻蚀留出支撑区域,再利用二氧化碳激光脉冲在毫秒级 时间内完成折叠,速度可达每秒2米,加速度超过2000米/秒2。进一步实验表明,该方法可将厚度10微 米的玻璃片折叠成90度直角、螺旋等多种形状,精度可控至0.1微弧度。 团队进一步制作了一种极轻的三维"桌子"结构,并在底部集成凹面腔镜。玻璃片厚度仅5微米左右,像 折纸玩具桌子一样被折叠成型。这类超轻、紧凑的结构原则上可通过光学方式悬浮,用于探索牛顿引力 在极小尺度上的偏差,从而为解决暗物质等天文难题提供新线索。 据最新一期《光学》杂志报道,以色列特拉维夫大学研究人员开发出一种技术,可以直接在芯片上将玻 璃片折叠成微观三维结构,他们称之为"光子折纸"。这一技术有望制造出微小而复杂的光 ...
2025年上合组织峰会将实现100%绿电供应
Ke Ji Ri Bao· 2025-08-25 23:49
今年以来,天津绿电市场化交易电量已经达到160.87亿千瓦时,同比去年增长了近两倍。"我们积极践 行'助企暖企'15项服务举措,为有绿电需求的企业提供强劲的'绿能引擎'。截至目前,我们已服务全市 214家企业实现全绿电供应,总电量达到74.97亿千瓦时。"天津市绿电绿证服务中心市场部主任畅雅迪 介绍。 同时,为确保用电无忧,国网天津电力在会议期间将部署超4200名保障人员、1800余台保障车辆,3个 城市供电网应急抢修中心、应急基干队伍以及全市101个"网格化"电力驻点24小时待命,时刻保持"一键 启动"状态。 与以往不同的是,此次电力保障还创新应用了全景保供电指挥平台,可实时监控从主电网到场馆用电设 备的全过程供电情况,线上调配人员、车辆、后勤等资源。 记者25日从国网天津电力获悉,在天津市绿电绿证服务中心的协助下,2025年上海合作组织峰会场馆方 与天津本地新能源企业完成绿电交易,达成交易电量100万千瓦时,实现会议期间全部活动场馆100%绿 色电力供应,相当于减少标煤燃烧320吨,减排二氧化碳800吨,这是上合组织峰会首次实现场馆全绿电 供应。 同时,天津市绿电绿证服务中心还积极推动机场、高铁站、海河游 ...
电力物资配送用上无人车
Ke Ji Ri Bao· 2025-08-25 23:48
Core Insights - The successful completion of the first unmanned delivery of electric power materials by the State Grid Corporation marks a significant advancement in logistics efficiency within the energy sector [1] - The unmanned delivery vehicle demonstrated a 30% improvement in delivery efficiency compared to traditional manual methods, achieving a punctuality rate of 98% and a damage rate of 0% for the delivered smart electric meters [1] Group 1 - The unmanned delivery vehicle departed from the State Grid Lianyungang Power Supply Company, carrying 360 smart electric meters to the Zhongyun Power Supply Station [1] - The smart dispatch platform monitored the vehicle's location in real-time, ensuring traceability throughout the delivery process [1] - The delivery was completed in 40 minutes, showcasing the effectiveness of the unmanned system [1] Group 2 - Currently, the State Grid Lianyungang Power Supply Company has deployed 2 unmanned delivery vehicles, covering 6 power supply stations in the main urban area [1] - The unmanned delivery system is capable of operating efficiently even during nighttime, ensuring rapid delivery under special circumstances [1]
佩戴合金首饰为何易引起过敏
Ke Ji Ri Bao· 2025-08-25 23:18
Core Viewpoint - Alloy jewelry, known for its "high aesthetic value and low price," has become a new favorite in online consumption, but long-term wear may pose health risks due to potential allergic reactions from certain metal components [1] Group 1: Health Risks Associated with Alloy Jewelry - A case study highlighted a woman in Wuhan who developed contact dermatitis after wearing an alloy necklace continuously, leading to symptoms such as red spots and blisters [1] - Nickel is identified as the primary allergen in alloys, accounting for over 20% of common metal allergies, followed by cobalt and chromium [2] - The allergic reaction mechanism involves a sensitization phase followed by an activation phase, where repeated exposure leads to inflammation and visible symptoms [2] Group 2: Factors Influencing Allergic Reactions - The likelihood of allergic reactions varies with the electrochemical properties of metals and individual immune responses, exacerbated by sweating in hot weather [3] - The release of metal ions from alloys can increase due to sweat, which contains electrolytes that facilitate the electrolysis of metals, leading to potential allergic reactions [3] - While localized contact with jewelry may not cause severe systemic reactions, prolonged exposure can damage the skin barrier and allow metal ions to enter the bloodstream, potentially leading to multi-organ issues [3] Group 3: Recommendations for Safe Use of Alloy Jewelry - Consumers are advised to choose jewelry made from safe materials and to purchase from reputable sources with proper certification [4] - Good wearing habits include removing jewelry during exercise and bathing, and limiting wear time to no more than 8 hours a day, especially in humid conditions [4] - Skin care practices, such as rinsing jewelry after sweating and applying protective creams, are recommended to maintain skin barrier integrity [4]
我国高端石墨产品研发取得连续突破 实现关键材料自主可控
Ke Ji Ri Bao· 2025-08-25 11:42
Core Insights - The Chinese Minmetals Research Team has successfully developed large-scale production technologies for high-end natural graphite materials, addressing the self-sufficiency challenges in China's graphite industry [1][2] - The advancements aim to transition China's graphite industry from a "resource powerhouse" to a "material powerhouse," enhancing the domestic supply of critical materials [1] Group 1: Technological Advancements - The research team has achieved breakthroughs in various technologies, including intelligent mining, "column-machine combined" beneficiation, and high-temperature continuous purification, facilitating the last mile of technology application in the natural graphite industry [1] - The team has developed ultra-pure natural graphite with a purity of 99.99995%, filling a significant gap in the supply of high-end graphite products in China [2] Group 2: Production Capacity - The company has established the world's largest green low-carbon intelligent graphite mine with an annual production capacity of 6 million tons, along with a graphite processing plant capable of producing 280,000 tons annually [2] - The production lines include 100,000 tons of spherical graphite and 80,000 tons of high-purity graphite, showcasing a comprehensive approach to integrating resources, capacity, technology, and new materials [2] Group 3: Future Outlook - The company plans to continue leading industry innovation through technological advancements, focusing on a development strategy of "one generation of raw materials, one generation of equipment, and one generation of products" [2]
全国早稻亩产首次突破400公斤
Ke Ji Ri Bao· 2025-08-25 09:30
Core Insights - The early rice planting area in China for 2025 is 71.143 million acres, a slight decrease of 179,000 acres from the previous year, maintaining overall stability [2] - The early rice yield has increased to 400.8 kg per acre, marking a 1.5% growth from the previous year, with a total production of 57.03 billion pounds, an increase of 6.8 billion pounds or 1.2% [1][2] - The increase in yield is attributed to favorable weather conditions and effective agricultural practices, despite some regional challenges such as drought [1][2] Regional Analysis - Among the 10 major early rice-producing provinces, all except Hainan reported yield increases, with Jiangxi, Hunan, and Guangdong seeing increases of 8.4 kg, 8.0 kg, and 6.3 kg per acre respectively [1] - The planting area in provinces like Zhejiang, Fujian, and Jiangxi has increased, while areas like Anhui and Guangdong experienced slight reductions due to spring drought [2] Government Support - The Chinese government has intensified support for grain production, including raising the minimum purchase price for early indica rice to encourage farmers [2] - The stable planting area for early rice has been maintained at around 71 million acres for six consecutive years, reflecting the effectiveness of government policies [2]
探寻|闯出自主创新“之江新路”
Ke Ji Ri Bao· 2025-08-25 09:22
Core Viewpoint - The article emphasizes the significant progress made in Zhejiang's innovation capabilities over the past 19 years, driven by a commitment to self-innovation and technological advancement, as initiated by Xi Jinping's vision in 2006 [2][4][12]. Group 1: Innovation Development - In 2006, Xi Jinping set a goal for Zhejiang to become an innovative province within 15 years, focusing on transforming the economic development model [4]. - By 2020, Zhejiang had established itself as an innovative province, with industrial R&D expenses reaching 372.04 billion yuan in 2024, a 5.5% increase year-on-year [6]. - The added value of high-tech industries in Zhejiang reached 1.5508 trillion yuan in 2024, growing by 8.3% compared to the previous year [6]. Group 2: Talent and Research Institutions - Zhejiang has established 117 provincial-level new research institutions by the end of 2024, which play a crucial role in cultivating strategic technological forces and driving innovation [8]. - The province has focused on integrating education and technology, with a talent pool exceeding 15 million and a research personnel ratio of 165.3 per 10,000 laborers in 2024 [10]. - The establishment of the Zhejiang University Interdisciplinary Research Institute in 2023 aims to foster cross-disciplinary research and innovation [9]. Group 3: Industry and Enterprise Innovation - Zhejiang has 47,500 national high-tech enterprises and 1,801 specialized "little giant" companies, ranking third in the country [11]. - The province has seen the emergence of numerous technology-driven companies, including Wanxiang Group, Alibaba, and Hikvision, contributing to high-quality development [11]. - The integration of technology and industry has led to significant advancements in fields such as artificial intelligence and new materials, positioning Zhejiang as a key player in international competition [11].
科技新观察|从长三角到长江经济带——超级“创共体”来了
Ke Ji Ri Bao· 2025-08-25 09:22
Group 1: Regional Collaboration and Innovation - The Yangtze River Economic Belt is enhancing collaborative innovation through the signing of the "Yangtze River Economic Belt Collaborative Innovation Framework Agreement" by 11 provinces and cities, focusing on cross-regional technological and industrial innovation [1][2] - The establishment of the "Long Triangle Technology Innovation Collaborative Development Decision" marks a new phase of legal governance for technological innovation collaboration in the Yangtze River Delta [1][9] - The Long Triangle region aims to strengthen the integration of technological and industrial innovation, fostering new industries and business models while expanding development space [1][10] Group 2: Technological Advancements and Achievements - The introduction of a new high-performance ultrafast laser from Anhui Huachuang Hongdu Optoelectronics Technology Co., Ltd. is set to change the domestic femtosecond laser market, with key components now being produced domestically [4][5] - The Long Triangle National Technology Innovation Center has attracted over 18,000 R&D personnel and incubated more than 1,700 enterprises, significantly contributing to technological advancements [6][10] - The successful development of the world's longest single-core underwater optical cable by Jiangsu Hengtong Optic-Electric Co., Ltd. demonstrates the region's capability to compete with international giants through collaborative innovation [8][10] Group 3: Ecosystem and Infrastructure Development - The Long Triangle region is focusing on creating a favorable business environment and optimizing the innovation ecosystem to support enterprise development and talent attraction [10][11] - The establishment of 24 Long Triangle Innovation Alliances aims to enhance cross-regional collaborative innovation, fostering a robust innovation atmosphere [8][10] - The integration of technological resources and the establishment of key laboratories across the Yangtze River Economic Belt are expected to drive significant advancements in technology and innovation [7][10]
我国首艘内河纯电动清漂转运船正式完成试航交付
Ke Ji Ri Bao· 2025-08-25 08:46
Core Viewpoint - The successful trial operation of the "Three Gorges Dam 1" marks a significant advancement in the development of electric-powered vessels for environmental protection in China's inland waterways [1][3]. Group 1: Vessel Specifications and Capabilities - "Three Gorges Dam 1" is the first pure electric debris collection and transport vessel in China's inland rivers, measuring 82 meters in length, 13.76 meters in width, and 4 meters in depth, with a maximum draft of 3.25 meters [2]. - The vessel is equipped with dual engines and propellers, allowing for a cruising range of up to 150 kilometers, and features two box-type power sources that resemble shipping containers [2]. - During flood seasons, the vessel can effectively locate, collect, and transport floating debris, ensuring the safety of the Three Gorges project [2]. Group 2: Environmental Impact and Economic Benefits - The "Three Gorges Dam 1" is estimated to replace 253.4 tons of fuel annually, leading to a reduction of 842.4 tons of carbon dioxide emissions [4]. - Compared to traditional powered vessels, this electric vessel offers better environmental and economic benefits, supporting the green development of inland shipping [4].