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不靠光合作用,靠地震“充电”——地球深部微生物生存奥秘破译
Ke Ji Ri Bao· 2025-08-07 09:20
在人类视线之外的黑暗深处,栖息着地球上95%的原核生物,约占地球总生物量的19%。这些深部生命 究竟如何延续?中国科学院广州地球化学研究所的一项研究发现,地壳断裂瞬间释放的化学能,可为地 下微生物提供能量。这一重要发现不仅改写了地球深部生态系统的能量剧本,也为火星、木卫二等星球 的"暗生命"设想提供了现实蓝本。相关研究论文日前发表于国际期刊《科学进展》。 据介绍,研究团队通过"压裂—反应"实验平台,模拟地下数公里内的断裂活动。当岩石破裂产生新鲜表 面时,断裂的化学键瞬间与水相遇,生成大量氢气和过氧化氢。 更关键的是,氢自由基与过氧化氢耦合驱动了铁的氧化还原循环——铁原子在两种状态之间反复转换, 持续释放电子。研究团队发现,这些电子进一步在碳、硫、氮等生命必需元素之间流动,形成看不见 的"地下电网",为微生物提供可直接取用的能量。"它们不需要光合作用,只需沿着电子梯度'充电'即可 生存。"中国科学院广州地球化学研究所特别研究助理吴逍介绍。 计算表明,地震每年在断裂面上产生的氢气通量可达到737.2摩尔每平方米,这些能量远远超过微生物 群落生存的需要,生命可以借此迅速繁殖生长。"这种能量机制甚至可能在火星古老断层 ...
我国高性能封严涂层技术取得突破
Ke Ji Ri Bao· 2025-08-07 07:34
Core Viewpoint - The introduction of the "new wear-resistant sealing coating technology" by the Mining and Metallurgy Group marks a significant advancement in China's sealing coating technology, transitioning from a follower to a leader in the field, addressing long-standing challenges in high-end equipment development [1][2] Group 1: Technology Development - The development of the wear-resistant sealing coating technology has taken over 20 years, supported by national projects, leading to the establishment of a testing platform that simulates extreme high-temperature and high-speed conditions [2] - The team has successfully developed eight types of long-life wear-resistant sealing coating materials that cover the entire temperature range, creating a comprehensive and controllable high-performance sealing coating technology system in China [2] Group 2: Industry Impact - The new coating technology has been integrated into China's high-end equipment industry, covering all key models of aviation engines and about two-thirds of advanced steam turbines, supporting the development of major domestic gas turbine models with nearly 10,000 units installed [2] - The wear-resistant sealing coating extends the lifespan of aviation engines to over 3,500 hours, advanced steam turbines to over 60,000 hours, and advanced gas turbines to over 30,000 hours, contributing to efficient and safe operation while reducing carbon dioxide emissions by over 12 million tons annually [2]
世界首台660MW超超临界“W”火焰锅炉试运成功
Ke Ji Ri Bao· 2025-08-07 02:43
作为项目核心创新点,世界首台660MW超超临界"W"火焰锅炉实现了重大技术突破。设计发电标煤耗 低至284.01克/千瓦时,较其他传统同类型火焰燃煤机组每度电可节约标煤20克,每年可节约标煤12万 吨,达到国际先进标准。 8月6日,国家电投集团贵州金元织金"上大压小"异地改建项目(2×660MW)1号火电机组顺利通过168 小时满负荷试运行。试运期间,机组运行稳定,各项性能指标优良,平均负荷率达到90%。这标志着搭 载世界首台660MW超超临界"W"火焰锅炉的1号机组已完全具备正式投入商业运营的条件。 据悉,该项目全部建成投运后,年发电量约60亿千瓦时,产值约20亿元,预计每年减排二氧化碳30余万 吨,相当于植树200万棵。 此外,项目还采用煤层气点火技术,年均可减少二氧化碳排放约1366吨;厂内燃煤运输环节引入纯电动 车队,实现运输环节零碳排放。 ...
风媒传播助植物通过环境剧变“大考”
Ke Ji Ri Bao· 2025-08-07 01:28
在地球生命演化的长卷中,植物的扩散策略始终是塑造陆地生态系统的隐形推手。风媒传播,这一 借助气流实现种子远行的策略,不仅关乎物种的生存疆域,更是环境剧变下的适应性机制。 距今约3390万年至2780万年的早渐新世,是"冷室气候"的起点。这一时期植物种子和果实的主要扩 散方式是什么?欧亚大陆东部和西部生态系统是否展现出相似扩散特征?相关问题一直是研究人员追踪 的热点。 为回答这两个科学问题,中国科学院西双版纳热带植物园(以下简称"版纳植物园")古生态研究组 研究人员,近期对欧亚大陆14个早渐新世化石点的植物类群进行了统计分析,并揭示了早渐新世捷克和 中国风传种子与果实的扩散机制及其古生态意义。日前,国际期刊《古地理学、古气候学、古生态学》 发表了相关研究论文。 古化石暗藏植物繁衍密码 近年来,版纳植物园古生态研究组研究人员在云南省楚雄市吕合镇发现大量保存完好、物种丰富的 植物化石。形成于早渐新世及其相近时期的捷克昆德拉蒂察化石点,与云南吕合化石点并列为欧亚大陆 东西部植物扩散机制研究的典型代表。 "种子和果实的扩散是维持生态系统结构与功能的关键过程,对大部分植物而言,这是其生命周期 中唯一能够实现个体迁移的阶段 ...
地球深部微生物生存奥秘破译
Ke Ji Ri Bao· 2025-08-07 01:28
在人类视线之外的黑暗深处,栖息着地球上95%的原核生物,约占地球总生物量的19%。这些深部 生命究竟如何延续?中国科学院广州地球化学研究所的一项研究发现,地壳断裂瞬间释放的化学能,可 为地下微生物提供能量。这一重要发现不仅改写了地球深部生态系统的能量剧本,也为火星、木卫二等 星球的"暗生命"设想提供了现实蓝本。相关研究论文日前发表于国际期刊《科学进展》。 据介绍,研究团队通过"压裂—反应"实验平台,模拟地下数公里内的断裂活动。当岩石破裂产生新 鲜表面时,断裂的化学键瞬间与水相遇,生成大量氢气和过氧化氢。 "在地下生命聚集的断裂系统中,岩石破裂产生的氢气量,比已知的蛇纹石化或辐射裂解过程高出 至少10万倍。"项目负责人、中国科学院广州地球化学研究所研究员朱建喜说,"地震就是剧烈的地壳断 裂过程,这一构造活动就像一台发动机,不断把地球内部的机械能转换为化学能。" 更关键的是,氢自由基与过氧化氢耦合驱动了铁的氧化还原循环——铁原子在两种状态之间反复转 换,持续释放电子。研究团队发现,这些电子进一步在碳、硫、氮等生命必需元素之间流动,形成看不 见的"地下电网",为微生物提供可直接取用的能量。"它们不需要光合作用,只需 ...
【科技日报】五年“三跨越” 按下科技强国建设“快进键”
Ke Ji Ri Bao· 2025-08-07 01:28
Group 1 - The launch of the third-generation autonomous superconducting quantum computer "Benyuan Wukong" and the successful return of samples from the "Chang'e 6" mission highlight China's advancements in technology and innovation [1][4] - The "14th Five-Year Plan" emphasizes the importance of innovation, aiming to build a technology powerhouse with leading global scientific strength and innovation capabilities [4][12] - Significant breakthroughs in foundational research have been achieved, including the detection of the first continuously active repeating fast radio bursts and advancements in quantum technology [5][6] Group 2 - The "Deep Sea No. 1" project, the world's first deep-water gas field developed independently, has begun full production, marking a significant milestone in China's deep-sea oil and gas development [2][8] - The launch of the first domestically produced large cruise ship "Aida·Modu" and the ongoing construction of the second ship "Aida·Huacheng" reflect advancements in China's shipbuilding industry [10] - The high-speed rail technology continues to innovate, with the CR450 train showcasing China's leadership in global high-speed rail operations [9] Group 3 - The rapid development of the new energy vehicle industry, which has maintained the highest global production and sales, demonstrates China's progress in automotive technology [11] - The establishment of the world's largest and most advanced 5G network has facilitated the digital transformation across various industries [11] - China's investment in research and development has reached new heights, with a nearly 50% increase in R&D funding compared to the end of the "13th Five-Year Plan" [12]
【科技日报】太阳“磁场舞蹈”之谜揭开
Ke Ji Ri Bao· 2025-08-07 01:28
Core Insights - The research team from the Yunnan Astronomical Observatory has revealed the physical mechanism of oscillating magnetic reconnection in the solar atmosphere through radiation magnetohydrodynamic simulations, providing a new theoretical model for understanding the periodic variations of solar activities such as solar flares and coronal mass ejections [1][2] - The study highlights the importance of understanding solar activity patterns for improving space weather forecasting [1] Group 1: Research Findings - Magnetic reconnection is a universal energy release process in the universe, akin to a dramatic "dance" of magnetic field lines that can release vast amounts of energy, leading to solar flares and coronal mass ejections [1] - Oscillating magnetic reconnection is characterized by the periodic reversal of current sheets formed at the intersection of magnetic field lines, with periods ranging from tens of minutes to several hours [1][2] - The research team utilized 2.5D radiation magnetohydrodynamic simulations to reconstruct the process of magnetic flux ropes rising from the convective zone to the atmosphere and reconnecting with the background magnetic field [1] Group 2: Mechanism and Implications - The study identified that the convective and turbulent motions in the solar convective zone are key drivers of the "dance" of magnetic fields, affecting the pressure gradient and Lorentz force around the current sheets [2] - The periodic fluctuations in the magnetic reconnection rate, ranging from 100 to 400 seconds, align with the oscillation periods of solar acoustic waves, indicating a deep connection between internal solar dynamics and atmospheric activities [2] - This research couples the dynamics of the convective zone with coronal magnetic reconnection, proposing a new mechanism for oscillating magnetic reconnection, which resolves previous discrepancies between simulation periods and observations [2]
上半年我国制造业“高端化”稳步推进
Ke Ji Ri Bao· 2025-08-07 01:25
Group 1 - The core viewpoint of the articles highlights the steady growth in sales revenue of enterprises in China during the first half of the year, driven by favorable tax policies and the development of the manufacturing sector [1][2] - Manufacturing sales revenue growth outpaced the overall growth of enterprises by 1.5 percentage points, indicating its crucial role in stabilizing economic growth [1] - High-end manufacturing is progressing steadily, with sales revenue in equipment manufacturing and high-tech manufacturing increasing by 8.9% and 11.9% year-on-year, respectively [1] - The high-tech industry continues to expand, with sales revenue growing by 14.3% year-on-year, reflecting rapid growth in this sector [1] - The digital economy's core industries saw a sales revenue increase of 10.1%, with enterprise procurement of digital technology rising by 9.9%, indicating a continuous acceleration in digital transformation [1] - Driven by large-scale equipment renewal policies, the procurement of machinery and equipment by enterprises increased by 11.1% year-on-year, maintaining a strong growth trend [1] - Consumer demand is being released more rapidly, with significant year-on-year retail growth in home appliances, such as a 45.3% increase in television sales and a 56.6% increase in refrigerator sales [1] Group 2 - The construction of a unified national market is progressing smoothly, with inter-provincial sales accounting for 40.7% of total enterprise sales revenue, an increase of 0.6 percentage points from the previous year [2]
国网青海电力:“未诉先行”确保偏远地区供电质量
Ke Ji Ri Bao· 2025-08-07 01:23
在青海省黄南藏族自治州同仁市隆务镇加毛村,一块刻着"新时代同仁'六尺巷'"的石碑静静伫立,讲述 着一段电力服务促进民族团结的暖心故事。 2024年寒冬,加毛村的3户藏族村民因宅基地前一根电杆的安置问题产生争执。国网同仁市供电公司党 员服务队闻讯而动,队员屈春巍第一时间赶到现场了解情况,与村民沟通交流。 清晨,海拔近3000米的青海省黄南藏族自治州同仁市还笼罩在雾中,国网同仁市供电公司党员服务队来 到金谷能源公司的配电室,队员刘玮掏出红外测温仪,说:"设备接头温度正常,但这条电缆的绝缘层 有老化迹象。" 测温仪上跳动的数字,让配电室负责人倒吸一口冷气:"太险了,我们真没发现隐患!" 这一幕,正是国网青海电力"未诉先行"服务模式的生动写照——变"被动抢修"为"主动预防",让电力服 务扎根在群众最需要的地方。 前不久,青海省黄南州持续强降雨,国网同仁市供电公司智能监测系统突然发出警报:"电压曲线波动 异常!" 当日凌晨,该公司研判发现兰采乡赛多村可能发生供电故障。天刚亮,共产党员刘玮、吴庆祥、丹增敦 钥带着便携电源等设备出发。面对被冲毁的公路和受损的桥梁,他们选择绕行南线。在海拔3000多米的 夏琼山上,队员们背负 ...
中国工程院院士刘中民:智能化工技术助力实现“双碳”目标
Ke Ji Ri Bao· 2025-08-07 01:15
Core Viewpoint - The launch of the intelligent chemical model 2.0Pro by Dalian Institute of Chemical Physics and iFlytek marks a significant technological advancement for China's chemical industry, facilitating the transition from laboratory to factory [1] Group 1: DMTO Technology and Its Impact - DMTO technology has been developed since the 1980s and has reached its third generation, with a single unit's methanol processing capacity now at 3.6 million tons per year [2] - The technology has signed contracts for 36 units, with a total capacity exceeding 24 million tons of olefins per year, of which 20 units are already in operation [2] - DMTO technology significantly reduces carbon emissions by about 50% compared to traditional coal combustion methods, making it a crucial direction for clean and efficient coal utilization [2] Group 2: Market Trends and Future Outlook - The domestic petrochemical industry is accelerating its transformation towards "new chemical materials" amid rising international oil price volatility [2] - Under the "dual carbon" goals, renewable energy generation is expected to account for 35% of total power generation by 2024, leading to a predicted decline in domestic refined oil demand to 100 million tons by 2050, less than 30% of current levels [2] - DMTO technology, utilizing coal as a stable and controllable raw material, is positioned to meet the growing demand for high-end chemical products and new materials [2] Group 3: Challenges in Energy Transition - The complexity of China's energy and industrial systems poses challenges for scientific decision-making and the determination of technological pathways for energy transition [6] - The integration of artificial intelligence with scientific research and industrial development is still in the exploratory stage, indicating a need for deeper coupling to fully leverage its application value [6] Group 4: Strategic Recommendations - To achieve energy security, the industry should focus on "oil-chemical switching" through catalytic technology, which can facilitate the production of both oil products and chemicals [8] - In the hydrogen energy and carbon capture, utilization, and storage (CCUS) sectors, a systematic layout and original breakthroughs are essential to seize technological advantages [9] Group 5: Role of Artificial Intelligence - The rapid development of artificial intelligence presents new opportunities and challenges for traditional research fields, particularly in chemical engineering, which involves complex dynamic systems [14] - The goal is to develop intelligent chemical processes that can transition from laboratory to factory in a single step, addressing the long-standing challenges of scaling up chemical technology [14]