Results 81 to 90 of about 2,057,274 (187)

中国淡水鱼类原色图集第二集

open access: yes, 1988
《中国淡水鱼类原色图集》是我国出版的第一部淡水鱼类原色照片图集,其所收集内容之广泛,色彩之真实,都达到了一定的水平。中国是世界淡水鱼种类最多的国家之一,其总数不下八百种。它们适应范围的广泛,区系组成的复杂,形态的千变万化,色泽的绚丽多彩,早已为人们所熟知。但由于鱼类栖息于江河湖泊之中,其自然环境和天然色彩难以被直接观察和记录,以往的科学描述也难免失真。《中国淡水鱼类原色图集》采用新的摄影技术,直接拍摄活体标本和模拟的生态环境,为人们提供了美丽的直观图片,这对开发利用我国的淡水鱼类资源,普及鱼类科学知识 ...
上海自然博物馆   +2 more
core  

Surface‐Enhanced Raman Scattering‐Based Multimodal Medical Imaging in Cancer Diagnosis and Therapy Monitoring

open access: yesRare Metals, Volume 45, Issue 10, October 2026.
ABSTRACT Surface‐enhanced Raman scattering (SERS) has emerged as a highly sensitive and specific technique for tumor imaging, owing to its narrow spectral features, resistance to photobleaching, and capability for multiplexed detection. However, its clinical translation remains limited by poor tissue penetration and the absence of intrinsic anatomical ...
Xinyu Miao   +7 more
wiley   +1 more source

污水中8种雌激素化合物的定量测定

open access: yes, 2005
采用固相萃取-气相色谱-质谱法(GC-MS)测定污水中辛酚(OP)、壬酚(NP)、双酚A(BPA)、己烯雌酚(DES)、雌酮(E1)、17β-雌二醇(E2)、17α-乙炔雌二醇(EE2)和雌三醇(E3)8种具有雌激素活性的化合物.被测组分的加标回收率为(65.4±4.0)%~(110.0±4.5)%,检出限为1.0~7.5 ng/L(相对标准偏差为5.2%~15.6%).经检测,武汉某城市污水处理厂进水中的目标化合物(除EE2外)浓度为6.5~8 954.9 ng/L;除EE2和E3外,出水中的浓度为3.
徐盈, 金士威, 廖涛, 惠阳
core  

水氮调控对暗管农田土壤脱盐效果及向日葵产量品质的影响

open access: yesShuitu Baochi Xuebao, 2023
为探究暗管排水条件下盐渍化农田最适宜的水氮制度,在河套灌区暗管布设区开展2年田间试验,设置低水(120 mm,I1)、中水(210 mm,I2)和高水(330 mm,I3)3个灌溉水平及低氮(0 kg/hm2,N1)、中氮(105 kg/hm2,N2)和高氮(210 kg/hm2,N3)3个追氮水平,分析不同水氮组合对土壤脱盐率及向日葵水氮利用效率和产量品质的影响。结果表明:暗管排水条件下,高水中氮(I3N2)的脱盐效果最佳,较其他水氮处理的脱盐率平均提高5.82%。高水(高氮)条件下,产量随着施氮量 ...
赵莎   +4 more
doaj  

Three‐Stage Fluid‐Assisted Dual‐Mode Janus E‐Skin for Thermally Comfortable Multiplexed SERS Sweat Analysis and Strain Monitoring

open access: yesRare Metals, Volume 45, Issue 10, October 2026.
ABSTRACT Wearable sweat sensors face persistent trade‐offs between multiplexed detection, signal stability, and wearing comfort. Here, we present a Janus electronic skin (e‐skin) with dual‐mode functionality, offering both thermal and moisture comfort.
Zhi‐Mei Mu   +12 more
wiley   +1 more source

一种用于污水净化和回用的生物生态组合装置

open access: yes, 2009
本实用新型公开了一种用于污水净化和回用的生物生态组合装置,它包括格栅/调节池、一体式膜生物反应器、贮水池、复合垂直流人工湿地四单元,污水进水管与格栅/调节池一侧上壁进口相连,格栅/调节池底部潜污泵出口与一体式膜生物反应器进水管道相连,一体式膜生物反应器中膜组件集水管与贮水池进口连接,贮水池出口与复合垂直流人工湿地进水配水管连接。复合垂直流人工湿地出水集水管与回用管道连接。在一体式膜生物反应器、贮水池、复合垂直流人工湿地各单元出口设置旁路管道 ...
贺锋   +5 more
core  

水库淹没土壤中磷浸出的模拟实验研究

open access: yesShuitu Baochi Xuebao, 2003
水库建成蓄水后,库底土壤中磷的浸出会对库水水质产生一定影响。以南水北调中线工程的调蓄水库——瀑河水库为例,在现场调查基础上,使用蒸馏水和不同组分的3种模拟水分别进行模拟实验,考察库水中总磷与钙离子浓度对土壤中磷浸出的影响。实验结果表明,蒸馏水与模拟水中总磷浓度均发生一定程度的变化,模拟水中的浓度变化比蒸馏水中的变化复杂;模拟水中总磷或钙离子浓度较高时,土壤中磷的浸出量较少,对库水水质未产生明显不良影响。
崔磊 郝芳华 张雪松 任希岩
doaj   +2 more sources

Light‐Synergistic Enhanced Synaptic Devices Toward Superadditive In‐Sensor Computing

open access: yesRare Metals, Volume 45, Issue 10, October 2026.
ABSTRACT Conventional neuromorphic devices face challenges in achieving efficient integration of light sensing and synaptic computation because of structural and material limitations. In this work, we developed an indium‐tin‐zinc oxide/transparent gelatin electrolyte synaptic transistor incorporating rare metal indium.
Wei Zhong   +16 more
wiley   +1 more source

一种用于污水净化和回用的生物生态组合的方法及装置

open access: yes, 2011
本发明公开了一种用于污水净化和回用的生物生态组合的方法及装置,步骤是:A.待处理的污水经过格栅/调节池,将大颗粒物质除去;B.步骤A处理的污水泵入一体式膜生物反应器中,在泵抽吸下渗透过膜;C.步骤B处理的污水流入中间贮水池;D.步骤C流出的污水分次进入复合垂直流人工湿地。装置包括格栅/调节池、一体式膜生物反应器、贮水池、复合垂直流人工湿地四单元,各单元通过管道连接,阀门控制。在一体式膜生物反应器、贮水池、复合垂直流人工湿地各单元出口设置旁路管道 ...
贺锋, 成水平, 吴振斌, 肖恩荣
core  

Co‐Optimization of Mechanical Performance and Osseointegration of Titanium‐Based Composites via a Novel Microwave‐Driven Boronization Strategy

open access: yesRare Metals, Volume 45, Issue 10, October 2026.
ABSTRACT The use of Ti6Al4V alloy in dental implantation is constrained by its high elastic modulus and biological inertness, which lead to delayed osseointegration and a high failure risk. Additionally, its chemical incompatibility with hydroxyapatite (HA) impedes the development of stable bioactive composites.
Shangyong Zuo   +8 more
wiley   +1 more source

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