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Differential response of radial growth and δ^(13)C in Qinghai spruce(Picea crassifolia) to climate change on the southern and northern slopes of the Qilian Mountains in Northwest China

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Journal of Forestry Research 2024年第3期35卷 205-218页

作者： Li Qin Huaming Shang Weiping Liu Yuting Fan Kexiang Liu Tongwen zhang ruibo zhang Key Laboratory of Tree-Ring Physical and Chemical Research(CMA)/Xinjiang Key Laboratory of Tree-Ring Ecology Institute of Desert MeteorologyChina Meteorological AdministrationUrimqi 830002People's Republicof China Xinjiang Meteorological Information Center Urimqi 830002People's Republic of China

Tree radial growth can have significantly differ-ent responses to climate change depending on the *** elucidate the effects of climate on radial growth and stable carbon isotope(δ^(13)C)fractionation of Qing-hai spruce(Picea crassifolia),a widely distributed native conifer in northwestern China in different environments,we developed chronologies for tree-ring widths and δ^(13)C in trees on the southern and northern slopes of the Qilian Mountains,and analysed the relationship between these tree-ring variables and major climatic ***-ring widths were strongly influenced by climatic factors early in the growing season,and the radial growth in trees on the northern slopes was more sensitive to climate than in trees on the ***-ring δ^(13)C was more sensitive to climate than radial growth.δ^(13)C fractionation was mainly influenced by summer temperature and precipitation early in the growing *** conductance more strongly limited stable carbon isotope fractionation in tree rings than photosynthetic rate *** response between tree rings and climate in mountains gradually weakened as climate *** in radial growth and stable carbon isotope fractionation of *** in response to climate in the Qilian Mountains may be further complicated by continued climate change.

关键词： Tree rings Qinghai spruce(Picea crassifolia Kom.) Stable carbon isotope(δ^(13)C) Qilian Mountains:Climate change

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A 602-year Reconstruction of July-June Streamflow in the Kuqa River, China, Reveals the Changing Hydrological Signals of the Tarim Basin

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Acta Geologica Sinica(English Edition) 2020年第3期94卷 690-697页

作者： SHANG Huaming CHEN Feng WEI Wenshou MAO Weiyi zhang ruibo zhang Tongwen YU Shulong Key Laboratory of Tree-ring Physical and Chemical Research of China Meteorological Administration/Xinjiang Laboratory of Tree-ring Ecology Institute of Desert MeteorologyChina Meteorological AdministrationUrumqi 830002China Yunnan Key Laboratory of International Rivers and Transboundary Eco-Security Institute of International Rivers and Eco-SecurityYunnan UniversityKunming 650504China

A regional tree-ring width chronology of Schrenk spruce(Picea schrenkiana) was used to determine the annual(previous July to current June) streamflow of the Kuqa River in Xinjiang, China, for the period of 1414–2015. A linear transformation of the tree-ring data accounted for 63.9% of the total variance when regressed against instrumental streamflow during 1957–2006. The model was validated by comparing the regression estimates against independent data. High streamflow periods with a streamflow above the 602-year mean occurred from 1430–1442, 1466–1492, 1557–1586, 1603–1615, 1687–1717, 1748–1767, 1795–1819, 1834–1856, 1888–1910 and 1989–2015. Low streamflow periods(streamflow below the mean) occurred from 1419–1429, 1443–1465, 1493–1556, 1587–1602, 1616–1686, 1720–1747, 1768–1794, 1820–1833, 1857–1887 and 1911–1988. The reconstruction compares well with the tree-ring-based streamflow series of the Tizinafu River from the Kunlun Mountains;both show well-known severe drought events. The streamflow reconstruction also shows highly synchronous upward trends since the 1980 s, suggesting that streamflow is related to Central Asian warming and humidification. Thus, the influences of the extremes and the persistence of low streamflows on local society may be considerable. Climatic changes in the watershed may be responsible for the change in the hydrologic regime of the Tarim Basin observed during the late twentieth century.

关键词： tree rings streamflow reconstruction Kuqa River Tarim Basin

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Reconstruction of hydrological changes based on tree-ring data of the Haba River, northwestern China

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Journal of Arid Land 2018年第1期10卷 53-67页

作者： zhang tongwen yuan yujiang chen feng yu shulong zhang ruibo qin li jiang shengxia institute of desert meteorology china meteorological administrationUrumqi 830002China key laboratory of tree-ring physical and chemical research of china meteorological administration Urumqi 830002China key laboratory of tree-ring ecology of xinjiang uygur autonomous region Urumqi 830002China

Reconstructing the hydrological change based on dendrohydrological data has important implications for understanding the dynamic distribution and evolution pattern of a given river. The widespread, long-living coniferous forests on the Altay Mountains provide a good example for carrying out the dendrohydrological studies. In this study, a regional composite tree-ring width chronology developed by Lariat sibirica Ledeb. and Picea obovata Ledeb. was used to reconstruct a 301-year annual （from preceding July to succeeding June） streamflow for the Haba River, which originates in the southern Altay Mountains, Xinjiang, China. Results indicated that the reconstructed streamflow series and the observations were fitting well, and explained 47.5% of the variation in the observed streamflow of 1957-2008. Moreover, floods and droughts in 1949-2000 were precisely captured by the streamflow reconstruction. Based on the frequencies of the wettest/driest years and decades, we identified the 19th century as the century with the largest occurrence of hydrological fluctuations for the last 300 years. After applying a 21-year moving average, we found five wet （1724-1758, 1780-1810, 1822-1853, 1931-1967, and 1986-2004） and four dry （1759-1779, 1811-1821, 1854-1930, and 1968-1985） periods in the streamflow reconstruction. Furthermore, four periods （1770-1796, 1816-1836, 1884-1949, and 1973-1997） identified by the streamflow series had an obvious increasing trend. The increasing trend of streamflow since the 1970s was the biggest in the last 300 years and coincided with the recent warming-wetting trend in northwestern China. A significant correlation between streamflow and precipitation in the Altay Mountains indicated that the streamflow reconstruction contained not only local, but also broad-scale, hydro-climatic signals. The 24-year, 12-year, and 2.2-4.5-year cycles of the reconstruction revealed that the streamflow variability of the Haba River may be influenced by solar activity and

关键词： Larzx sibiffca Ledeb. Picea obovata Ledeb. streamflow reconstruction tree-ring width Altay Mountains

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Influence of stationary driven helical current on the m=2/n=1 resistive tearing mode

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Plasma Science and Technology 2019年第5期21卷 73-78页

作者： Yun YUAN Xingqiang LU Jiaqi DONG Zhixiong HE ruibo zhang Shijia CHEN Xueyu GONG School of Nuclear Science and Technology University of South ChinaHengyang 421001People's Republic of China College of Science National University of Defense TechnologyChangsha 410073People's Republic of China Southwestern Institute of Physics Center for Fusion ScienceChengdu 610041People's Republic of China School of Mathematics and Physics Fujian University of TechnologyFuzhou 350108People's Republic of China Institute of Plasma Physics Chinese Academy of SciencesHefei 230031People's Republic of China

The influence of stationary driven helical current on tearing mode instability in the m=2/n=1 rational surface is explored numerically using resistive magnetohydrodynamic simulation in cylindrical *** results indicate that the flip instabilities result from the sustained injection of the sufficiently strong helical current driven in the island *** driven helical current induces high order harmonics of instabilities due to the delay of suppressing timing and the increase of its current *** the appropriate current density values,the development of the perturbed kinetic energy can be limited and the occurrence of the flip instabilities can be delayed for a long *** radial deviation of the current deposition can lead to poor inhibition effect,and the effect of current bias on the boundary is greater than that on the axis.

关键词： tearing modes helical current MHD instability

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Effect of kinetic ions on the toroidal double-tearing modes

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Chinese Physics B 2023年第2期32卷 366-371页

作者：张睿博叶磊 Yang Chen 项农杨小庆 Hefei Institutes of Physical Science Chinese Academy of SciencesHefei 230031China University of Science and Technology of China Hefei 230026China Center for Integrated Plasma Studies University of Colorado at BoulderBoulderColorado 80309USA

We investigate the effects of kinetic ions on double-tearing modes(DTMs) using the gyrokinetic particle-in-cell simulation code GEM with a gyrokinetic ion/fluid electron hybrid model. It is found that the ion kinetic effects can decrease the growth rate of the DTMs. This effect is more significant for stronger coupling of DTMs with smaller distance between the rational surfaces. Kinetic ions can also enhance the coupling effect between the two rational surfaces. Energy transfer analyses between particles and wave fields show that the stabilizing effect of kinetic ions comes mainly from the perpendicular magnetic drift of ions in the coupling region and around the outer rational surface.

关键词： double-tearing modes kinetic ions coupling effect

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Climatic response of Pinus sylvestris var. mongolica tree-ring width and precipitation reconstruction for the northern Greater Higgnan Mountains, China, since 1720

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Research in Cold and Arid Regions 2014年第6期6卷 546-555页

作者： TongWen zhang YuJiang Yuan WenShou Wei ruibo zhang ShuLong Yu Feng Chen HuaMing Shang Li Qin ZiAng Fan Institute of Desert Meteorology China Meteorological Administration Key Laboratory of Tree-ring Physical and Chemical Research of China Meteorological Administration Key Laboratory of Tree-ring Ecology of Uighur Autonomous Region

August-June precipitation has been reconstructed back to AD 1720 for the northern Greater Higgnan Mountains, China, by use ofPinus sylvestris var. mongolica tree-ring width. The reconstruction explains the variance of 39% in observed precipitation from 1973 to 2008. Some extremely dry/wet signals in historical documents and other precipitation reconstructions in previous studies are precisely captured in our reconstruction. Wet periods occurred during the periods of 1730 to 1746, 1789 to 1812, 1844 to 1903, 1920 to 1930, 1942 to 1961, and 1985 to 1998; while periods of 1747 to 1788, 1813 to 1843, 1904 to 1919, 1931 to 1941, and 1962 to 1984 were relatively dry. Power spectral and wavelet analyses demon- strated the existence of significant 24-year, 12-year, and 2-year cycles of variability.

关键词： Greater Higgnan Mountains Pinus sylvestris var. mongolica tree-ring width precipitation reconstruction

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FCC再生烟气中CO_2捕集技术的试验研究

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石油炼制与化工 2014年第8期45卷 77-81页

作者：张瑞波中国石化洛阳工程有限公司河南洛阳471003

根据FCC再生烟气特点，应用化学吸收法对烟气中CO2进行捕集。在2m3／h烟气中CO2捕集试验装置上对烟气中CO2捕集技术进行试验研究，结果表明，FCC再生烟气中CO2捕集的适宜工艺条件为：吸收剂质量分数15％～30％，吸收温度60～70℃，解吸... 详细信息

根据FCC再生烟气特点，应用化学吸收法对烟气中CO2进行捕集。在2m3／h烟气中CO2捕集试验装置上对烟气中CO2捕集技术进行试验研究，结果表明，FCC再生烟气中CO2捕集的适宜工艺条件为：吸收剂质量分数15％～30％，吸收温度60～70℃，解吸温度90～120℃，气液体积比100～250，吸收液为全回流状态。在上述条件下，采用开发的新型吸收剂CHA，烟气中CO2的捕集率达95％，解吸率达80％。与单乙醇胺吸收剂（MEA）相比，CHA的吸收速率相当，解吸能耗低，对设备的腐蚀性小，腐蚀速率仅为0．0136mm／a，同样条件下MEA的腐蚀速率为0．0325mm／a。烟气中的SOz对COz的捕集效果影响较大，在CO2捕集前应先脱除。

关键词： FCC再生烟气 CO2捕集化学吸收吸收剂

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Discovery of Novel N-Isoxazolinylphenyltriazinones as Promising Protoporphyrinogen IX Oxidase Inhibitors

Discovery of Novel N-Isoxazolinylphenyltriazinones as Promis...

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第十一届全国化学生物学学术会议

作者： ruibo zhang Dawei Wang Xin Wen Zhen Xi State Key Laboratory of Elemento-Organic Chemistry and Department of Chemical BiologyCollege of ChemistryCollaborativeInnovation Center of Chemical Science and EngineeringNankai University

Protoporphyrinogen oxidase（PPO;EC 1.***.3.4） is an ideal target for herbicide development. PPO inhibitors have many advantages, such as broad herbicidal spectrum, high efficiency in low concentration, long-term efficacy and safety, and other environmentally benign characteristics. In this study, a series of novel N-isoxazolinyl-phenyl-triazinones were designed by considering of the scaffold hopping strategy and systematic SAR-guided structure optimization. Especially, compound ethyl 3-（2-chloro-5-（3,5-dimethyl-2,6-dioxo-4-thioxo-1,3,5-triazinan-1-yl）-4-fluorophenyl）-5-methyl-4,5-dihydroisoxazole-5-carboxylate 5 a, with a Ki value of 4.9 nM, displayed over 2-and 6-fold higher potency than saflufenacil（Ki = 10.0 nM） and trifludimoxazin（Ki = 31 nM）, respectively. The herbicidal spectrum experiments indicated that 5 a showed excellently and broad-spectrum of weeds control against 32 kinds of tested weeds at 37.5-75 g ai/ha by post-emergent application, which was a slightly improved than that of saflufenacil at the same condition. Most promisingly, 5 a exhibited relatively safe to rice at 150 g ai/ha by post-emergence application, insinuated that 5 a may be used for the development of potential herbicide candidate for weeds control in paddy fields.

关键词： protoporphyrinogen IX oxidase isoxazoline triazinone herbicide

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Design and Herbicidal Activity of Cycloalka[d]quinazoline-2,4-dione-Benzoxazinones as Protoporphyrinogen Ⅸ Oxidase Inhibitors

Design and Herbicidal Activity of Cycloalka[d]quinazoline-2,...

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第十一届全国化学生物学学术会议

作者： Dawei Wang ruibo zhang Xin Wen Zhen Xi State Key Laboratory of Elemento-Organic Chemistry and Department of Chemical BiologyCollege of ChemistryCollaborativeInnovation Center of Chemical Science and EngineeringNankai University

Weed management has been a concern throughout the world’s history. Using herbicides is one of the most effective ways to manage weeds and preserve crop quality and yields. Protoporphyrinogen oxidase（PPO, EC 1.***.3.4） inhibitory herbicides are among the most widely used herbicides in the crop fields around the world. These herbicides can inhibit the PPO in planta, which is the penultimate enzyme in the biosynthesis of chlorophyll. In continuation of our search for potent PPO inhibitors, we designed and synthesized a series of novel herbicidal cycloalka[d]quinazoline-2,4-dione-benzoxazinones. The bioassay results of these synthesized compounds indicated that most of the compounds exhibited very strong Nt PPO inhibition activity. More than half of the synthesized compounds displayed over 80% control of all three tested broadleaf weeds at 37.5-150 g ai/ha by post-emergent application, majority of them showed no phytotoxicity toward at least one kind of crop at 150 g ai/ha. Promisingly, 17 i（Ki = 6.7 n M） showed 6 and 4 times more potent than flumioxazin（Ki = 46 nM）, and trifludimoxazin（Ki = 31 nM）, respectively. Moreover, 17 i displayed excellent and broad-spectrum herbicidal activity even as low as 37.5 g ai/ha, and safe for wheat at 150 g ai/ha by post-emergent application, indicating the great potential for 17 i development as a herbicide for weed control in wheat fields.

关键词： benzoxazinone protoporphyrinogen IX oxidase herbicide weed control

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涤纶POY和FDY油剂开发

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合成纤维工业 2006年第2期29卷 21-23,26页

作者：张瑞波中国石化洛阳石油化工工程公司工程研究院河南洛阳471003

分析了涤纶POY,FDY生产工艺对油剂及单体的要求,探讨了各油剂单体的性能。POY油剂组成以聚醚、聚氧乙烯脂肪酸酯为主,FDY油剂组成以聚醚、合成酯、聚氧乙烯脂肪醇醚为主。分别在60 kL/a POY和40 kt/a FDY的涤纶熔体直纺工业生产装置上... 详细信息

分析了涤纶POY,FDY生产工艺对油剂及单体的要求,探讨了各油剂单体的性能。POY油剂组成以聚醚、聚氧乙烯脂肪酸酯为主,FDY油剂组成以聚醚、合成酯、聚氧乙烯脂肪醇醚为主。分别在60 kL/a POY和40 kt/a FDY的涤纶熔体直纺工业生产装置上进行应用,考察了油剂性能指标,并与德国SS公司 POY油剂、竹本F-1641 FDY油剂进行了比较。结果表明:油剂可纺性良好,POY,FDY油剂的断丝次数分别为1．6,1．7次/d·锭,FDY油剂的染色A级品率达1000A%较对比油剂高0．54％,油剂的可纺性、集束性、耐热性及染色性等使用性能,满足生产工艺要求。

关键词：聚对苯二甲酸乙二酯纤维预取向丝全拉伸丝油剂

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