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| 1 | Linkage between permafrost distribution and river runoff changes across the Arctic and the Tibetan Plateau显示文摘River runoff in the Arctic and the Tibetan Plateau(TP) change significantly in recent decades. However, the mechanisms of the physical processes of permafrost river runoff change remain uncertain across large scale. This study investigated the mainstreams and tributaries of main Arctic and TP rivers dominated by permafrost and assessed the linkage between hydrological regime change and permafrost. The results show that the effects of permafrost on river runoff are highly dependent on the permafrost coverage of a watershed. For the past decades, the majority of the Arctic and TP basins showed increased discharge, while all of the studied basins showed increased baseflow, with faster increasing speed than total discharge.Both total discharge and baseflow annual change rate(ΔQ and ΔBF) increased with permafrost coverage, indicating the increments of streamflow are enhanced with high permafrost coverage. Meanwhile, the annual change of precipitation showed weak connection with total discharge and baseflow change. The high permafrost coverage basins showed high annual maximum/minimum discharge ratio(Qmax/Qmin), while the Qmax/Qminchanged slightly in low permafrost cover basins. Our results highlight the importance of permafrost coverage on streamflow regime change for permafrost basins across the northern hemisphere. Due to these linkage between permafrost extent and runoff regime change and the increasing changes of permafrost, more attention should be paid to the change of hydrological processes in permafrost-underlain basins. | Chunlin SONG Genxu WANG Tianxu MAO Junchen DAI Daqing YANG | 2020 | Science China Earth Sciences2020，63，2： | 10 |
| 2 | Experimental studies on perturbed acoustic resonant spectroscopy by a small rock sample in a cylindrical cavity显示文摘A measurement system for acoustic resonant spectroscopy (ARS) is estab-lished,and the effects of resonant cavity geometry,inner perturbation samples and envi-ronmental temperature on the ARS are investigated. The ARSs of the small samples with various sizes and acoustic properties are measured. The results show that at the normal pressure,the resonant frequency decreases gradually with the increase of liquid tem-perature in the cylindrical cavity,while the resonant amplitude increases. At certain pres-sure and temperature,both the resonant frequency and the amplitude decrease greatly when there exist air bubbles inside the cavity fluid. The ARS is apparently affected by the sample porosity and the sample location in the resonant cavity. At the middle of the cavity,the resonant frequencies reach their maximum values for all of the measurement samples. The resonant frequencies of the porous rock samples are smaller than those of the com-pacted samples if other acoustic parameters are the same. As the sample is moved from the top to the middle of the cavity along its axis,the resonant amplitude increases gradu-ally for the compacted rocks while decreases for the unconsolidated rocks. Furthermore,the resonant amplitude increases firstly and then decreases if the porosity of the rock sample is relatively small. In addition,through the comparisons between the experimental and theoretical results,it is found that the effects of the acoustic parameters and sizes of the samples and the size of the cylindrical cavity on the laboratory results agree well with the theoretical ones qualitatively. These results may provide basic reference for the ex-periment study of rock acoustic properties in a low frequency using ARS. | CHEN Dehua1,2,WANG Xiuming2,3,CONG Jiansheng1,XU Delong1,SONG Yanjie1 & MA Shuilong4 1. Department of Geophysics,Daqing Petroleum Institute,Daqing 163318,China 2. Institute of Acoustics,Chinese Academy of Sciences,Beijing 100080,China 3. Division of Petroleum,Australian Commonwealth Scientific and Industrial Research Organization,Bent-ley WA 6102,Australia 4. Daqing Testing and Technology Services Corporation,Daqing 163153,China | 2006 | Science China(Physics,Mechanics & Astronomy)2006，49，6： | 8 |
| 3 | Activation of mitogen-activated protein kinases in satellite glial cells of the trigeminal ganglion contributes to substance P-mediated inflammatory pain显示文摘Inflammatory orofacial pain,in which substance P (SP) plays an important role,is closely related to the cross-talk between trigeminal ganglion (TG) neurons and satellite glial cells (SGCs).SGC activation is emerging as the key mechanism underlying inflammatory pain through different signalling mechanisms,including glial fibrillary acidic protein (GFAP) activation,phosphorylation of mitogen-activated protein kinase (MAPK) signalling pathways,and cytokine upregulation.However,in the TG,the mechanism underlying SP-mediated orofacial pain generated by SGCs is largely unknown.In this study,we investigated whether SP is involved in inflammatory orofacial pain by upregulating interleukin (IL)-1β and tumour necrosis factor (TNF)-α from SGCs,and we explored whether MAPK signalling pathways mediate the pain process.In the present study,complete Freund’s adjuvant (CFA) was injected into the whisker pad of rats to induce an inflammatory model in vivo.SP was administered to SGC cultures in vitro to confirm the effect of SP.Facial expression analysis showed that pre-injection of L703,606 (an NK-1 receptor antagonist),U0126 (an inhibitor of MAPK/extracellular signal-regulated kinase [ERK] kinase [MEK] 1/2),and SB203580 (an inhibitor of P38) into the TG to induce targeted prevention of the activation of the NK-1 receptor and the phosphorylation of MAPKs significantly suppressed CFA-induced inflammatory allodynia.In addition,SP promoted SGC activation,which was proven by increased GFAP,p-MAPKs,IL-1β and TNF-α in SGCs under inflammatory conditions.Moreover,the increase in IL-1β and TNF-α was suppressed by L703,606,U0126 and SB203580 in vivo and in vitro.These present findings suggested that SP,released from TG neurons,activated SGCs through the ERK1/2 and P38 pathways and promoted the production of IL-1β and TNF-α from SGCs,contributing to inflammatory orofacial pain associated with peripheral sensitization. | Yanyan Zhang Ning Song Fei Liu Jiu Lin Mengke Liu Chaolan Huang Daqing Liao Cheng Zhou Hang Wang Jiefei Shen | 2019 | International Journal of Oral Science2019，11，3： | 6 |
| 4 | PREPARATION,IDENTIFICATION AND INTERFACIAL ACTIVITIES OF PETROLEUM CARBOXYLATE AS SURFACTANT FOR CHEMICAL FLOODING显示文摘Petroleum carboxylate that may be suitable for tertiary oil recovery have been producedinexpensively from the fractions of Daqing crude oil by a two step process.The feed stock was firstoxidized in the vapor phase,followed by reaction of the oxidized products with sodiumhydroxide.Dilute solutions of sodium carboxylates were produced and showultralow(10-2mN/m)interfacial tensions(IFTs)against a variety of hydrocarbons with a widerange of ACN(Alkane Carbon Number).Infrared spectroscopy was used to identify the functionalgroups in the oxidized and the saponified products. | Hong De HUANG Jianghan Petroleum Institute,Jiangling,Hubei,434102You Zhen YANG Ji Xin TANG Cheng Quan HE Rong Ming ZHANG Song Mei ZHANG Daqing Petroleum Institute,Anda,Heilongjiang,151400 | 1993 | Chinese Chemical Letters1993，4，4： | 3 |
| 5 | Environmental quality and development: Is there a Kuznets Curve for air pollution emissions? 显示文摘 | Selden Thomas & Daqing Song | 1994 | Journal for Environmental Economics and Management1994，27，： | 1 |
| 6 | Environment&l qu&lity and development= is there a kuznets curve for air pollution emissions?显示文摘 | THOMAS MATHIASEN SELDEN SONG DAQING | 1994 | J Environ Econ Manage1994，，： | 1 |
| 7 | Environmental Quality and Development: Is There a Kuznets Curve for Air Pollution Emissions? 显示文摘 | Thomas Selden Daqing Song | 1994 | Journal of Environmental Economics and Management1994，27，2： | 1 |
| 8 | Environmental quality and development: Is there a Kuznets Curve for air pollution emissions?显示文摘 | Selden Thomas &Daqing Song | 1994 | Journal for Environmental Economics and Management1994，，27： | 1 |
| 9 | Neoclassical growth,the J curve for abatement, and the inverted U curve for pollution 显示文摘 | Thomas S Song Daqing | 1995 | Journal of Environmental Economics and Management1995，29，： | 1 |
| 10 | Environmental quality and development: Is there a Kuznets Curve for air pollution emissions? 显示文摘 | SELDEN T SONG DAQING | 1994 | Journal for Envi- ronmental Economics and Management1994，27，： | 1 |
| 11 | The J curve for abatement and the inverted U curve for pollution显示文摘 | SELDEN T SONG DAQING | 1995 | Journal of Environmental Economics and Man- agement1995，29，： | 1 |
| 12 | Environmental quality and de- velopment:is there a Kuznets curve for air pollution emissions? 显示文摘 | SELDEN T M SONG Daqing | 1994 | Journal of Environmental Economics and Management1994，27，2： | 1 |
| 13 | Neoclassical Growth, the J Curve for Abatement, and the Inverted U Curve for Pollution显示文摘 | Thomas M. Selden Daqing Song | 1995 | Journal of Environmental Economics and Management1995，，2： | 1 |
| 14 | Novel Passive Snubber Suitable for Three-Phase SingleStage PFC Based on an Isolated Full-Bridge Boost Topology显示文摘 | Tao Meng Hongqi Ben Daqing Wang Jianfeng Song | | 0，，03： | 1 |
| 15 | Surgical Removal Followed by Radiotherapy for Refractory Vocal Process Granuloma显示文摘 | Yongli Song Li Shi Yu Zhao Daqing Zhao Mei Shi Zhihong Deng | 2012 | Journal of Voice2012，，5： | 1 |
| 16 | Environmental Quality and Development:Is there a Kuznets Curve for Air Pollution Emissions?显示文摘 | Selden Thomas M Daqing Song | 1994 | Journal of Environmental Economics and Management1994，27，2： | 1 |
| 17 | Environmental quality and development: is there a Kuznets curve for air pollution emissions? 显示文摘 | Selden T M Song Daqing | 1994 | Journal of Environmental Economics and Management1994，27，2： | 1 |
| 18 | Neoclassical Growth,the J Curve for Abatement,and the Inverted U Curve for Pollution显示文摘 | Selden Thomas M Daqing Song | 1995 | Journal of Environmental Economics and Management1995，29，2： | 1 |
| 19 | Environmental quality and development:is there a Kuznets Curve for air pollution emissions显示文摘 | SELDEN THOMAS M SONG DAQING | 1994 | Journal of Environmental Economies and management1994，27，2： | 1 |
| 20 | Environmental quality and development: is there a Kuznets Curve for air pollution emissions? 显示文摘 | Selden T M Song Daqing | 1994 | Journal of Environmental Economics and Management1994，27，2： | 1 |
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