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| 1 | Structure and coalbed methane occurrence in tectonically deformed coals显示文摘Research on structure of tectonically deformed coals(TDC) is a key issue in coal and gas outburst prevention and coalbed methane(CBM) exploitation.This paper presents a summary on the research progress in TDC's structural-genetic classification,tectonic strain influence on coal microstructure,coal porosity system,coal chemical structure and constituents,and their relationship with the excess coalbed methane.Previous studies suggested that tectonic deformation had significant influence on coal microstructure,coal super microstructure,and even chemical macromolecular structure.The main mechanisms of coal deformation are the tectonic stress degradation and polycondensation metamorphism(dynamical metamorphism).Besides,under different deformation mechanisms,the ultra-and micro-structure and chemical constituents of TDC presented distinct characteristics.Based on these achievements,we propose one possible evolutionary trend of TDC with different deformation mechanisms,and suggest that the coal and gas outburst in the TDC,especially in the mylonitic coals,may be not only controlled by geological structure,but also influenced by the tectonic stress degradation of ductile deformation.Therefore,further study on TDC should be focused on the controlling mechanism of deformation on structure and composition of coal,generation conditions and occurrence state of excess coalbed methane from deformation mechanism of coal. | HOU QuanLin LI HuiJun FAN JunJia JU YiWen WANG TianKai LI XiaoShi WU YuDong | 2012 | Science China Earth Sciences2012，55，11： | 49 |
| 2 | Relationship between nano-scale deformation of coal structure and metamorphic-deformed environments显示文摘There is a more consanguineous relation be-tween nano-scale deformation of coal structure and meta-morphic-deformed environment. In different metamor-phic-deformed environments, deformation in the coal struc-ture can occur not only at micro-scale, but also at nano-scale, and even leads to the change of molecular structure and nano-scale pore (<100 nm) structure. The latter is the main space absorbing coalbed methane. Through X-ray diffraction (XRD) and liquid–nitrogen absorption methods, the charac-teristics of macromolecular and nano-scale pore structures of coals in different metamorphic-deformed environments and deformational series of coals have been studied. By combin-ing with high-resolution transmission electron microcopy (HRTEM), the macromolecular and nano-scale pore struc-tures are also directly observed. These results demonstrate that the stacking Lc of the macromolecular BSU in tectonic coals increases quickly from the metamorphic-deformed environment of low rank coals to that of high rank coals. For different deformed tectonic coals, in the same metamor-phic-deformed environment, the difference of Lc is obvious. These changes reflect chiefly the difference of different tem-perature and stress effect of nano-scale deformation in tec-tonic coals. The factor of temperature plays a greater role in the increase of macromolecular structure parameters Lc, the influence of stress factor is also important. With the stress strengthening, Lc shows an increasing trend, and La /Lc shows a decreasing trend. Therefore, Lc and La /Lc can be used as the indicator of nano-scale deformation degree of tectonic coals. With increasing temperature and pressure, especially oriented stress, the orientation of molecular structure be-comes stronger, and ordering degree of C-nets and the ar-rangement of BSU are obviously enhanced. For the deforma-tion of nano-scale pore structure, in the same metamor-phic-deformed environment, along with the strengthening of stress, the ratio of mesopores to its total pores volume of tec-tonic coals reduces to a large extent, the ratio of volume of micropores and the pores whose diameters are lower than micropores increases, and sub-micropores and ultra- micro-pores can be found. Moreover, the ratio of specific surface area of mesopores to its total pores reduces rapidly while theamount of sub-micropores increases more quickly. The duc-tile structure coal has a change in pore parameters similar to that of weak brittle deformation. There are differences in the deformation and evolution of nano-scale pore structure of different kinds of tectonic coals formed in different meta-morphic-deformational environments. In short, temperature and confining pressure play some role in the change of nano-scale pore structure parameters, whereas stress has important influence on the evolution of characteristic parameters in nano-scale pore structure of tectonic coals. | JU Yiwen JIANG Bo HOU Quanlin WANG Guiliang | 2005 | Chinese Science Bulletin2005，50，16： | 40 |
| 3 | Behavior and mechanism of the adsorption/desorption of tectonically deformed coals显示文摘The physical and chemical texture of tectonically deformed coals produced by various formational mechanisms are different from those of primary coals,thus resulting in major differences among the physical properties of the reservoirs of these coals. We have studied the adsorption/desorption be-havior of tectonically deformed coals by the use of isothermal adsorption/desorption experiments un-der equilibrium moisture condition. Experiments of isothermal adsorption/desorption of methane or multi-component gases have indicated that,the adsorption curves of coals with a low degree of tec-tonic deformation conform to the type of isothermal adsorption curve described by the Langmuir equation; the methane adsorption curves of coals with strong tectonic deformation cannot be de-scribed by the Langmuir equation. The adsorption/desorption process of methane and multi-compo-nent gases in the deformed coals is not consistent with primary coals,which form an effect of hys-teresis in different kinds of tectonically deformed coals. With the change of pore structure of tectoni-cally deformed coals at reservoir condition,the added adsorbed CH4 in the experiments is desorbed on the pore surface of coals during the pressure reduction process. Thus,the result shows that the ad-sorption volume in the process of desorbing is greater than that in adsorbing. Because of the defor-mation,structural change,and transformation of the adsorption potential field of coals,it is essential to form a new kind of isothermal adsorption curve and the hysteresis effect of the desorption process. | JU YiWen JIANG BO HOU QuanLin TAN YongJie WANG GuiLiang XIAO WenJiao | 2009 | Chinese Science Bulletin2009，54，1： | 26 |
| 4 | Spectra response from macromolecular structure evolution of tectonically deformed coal of different deformation mechanisms显示文摘Coals with different deformation mechanisms(brittle deformation,brittle-ductile deformation,and ductile deformation) repre-sent different ways in macromolecular structure evolution based on the metamorphism.The evolution of coal structure could affect the occurrence condition of coalbed methane(CBM) because the nanopore structure affected by macromolecular struc-ture is the most important reservoir for CBM.This paper analyzes the evolutions and mechanisms of structure and functional group of tectonically deformed coals(TDCs) collected from Huainan-Huaibei coalfield using X-ray diffraction(XRD),Raman spectroscopy,and Fourier Transform Infrared(FTIR) spectroscopy methods.The results show that the macromolecular struc-ture evolutions of TDC are different from the primary structure coal as a result of the different metamorphic grade and defor-mation mechanisms.The different deformation mechanisms variously affect the process of functional group and polyconden-sation of macromolecular structure.Furthermore,the tectonic deformation leads to secondary structural defects and reduces the structure stability of TDC.The coupled evolution on stacking and extension caused by the changes of secondary structural de-fects results from different deformation mechanisms.We consider that the changes of chemical structure and secondary struc-tural defects are the primary reasons for the various structure evolutions of TDC compared with primary structure coal. | LI XiaoShi JU YiWen HOU QuanLin LIN Hong | 2012 | Science China Earth Sciences2012，55，8： | 18 |
| 5 | Comparison of coalbed gas generation between Huaibei-Huainan coalfields and Qinshui coal basin based on the tectono-thermal modeling显示文摘The geothermal history and the tectonic subsidence history of the Huaibei-Huainan coalfields were reconstructed by using the vitrinite reflectance data, and their correlative restriction on coalbed gas generation of Huaibei-Huainan coalfields and Qinshui coal basin was discussed. The burial, thermal, and maturity histories of are similar between Huaibei coalfield and Huainan coalfield, obviously different from those of Qinshui coal basin. Based on the tectono-thermal evolution characters of Huaibei-Huainan coalfields and Qinshui basin, the process of coalbed gas generation can be divided into three stages: (1) During Early Mesozoic, both in Huaibei-Huainan and Qinshui, the buried depth of Permian coal seams increased rapidly, which resulted in strong metamorphism and high burial temperature of coal seams. At this stage, the coal rank was mainly fat coal, and locally reached coking coal. These created an environment favoring the generation of thermogenic gas. (2) From Late Jurassic to Cretaceous, in the areas of Huaibei-Huainan, the strata suffered from erosion and the crust became thinning, and the Permian coal-bearing strata were uplifted to surface. At this stage, the thermogenic gas mostly escaped. Conversely, in Qinshui basin, the cover strata of coal seams kept intact during this stage, and the thermogenic gas were mostly preserved. Furthermore, with the interaction of magmatism, the burial temperature of coal seams reached higher peak value, and it was suitable for the secondary generation of thermogenic gas. (3) From Paleogene onward, in area of Huainan-Huaibei, the maturity of coal and burial temperature were propitious to the generation of secondary biogenic gases. However, in Qinshui basin, the maturity of coal went against genesis of second biogenic gas or thermogenic gas. By comparison, Huaibei-Huainan coalfields are dominated by thermogenic gas with a significant biogenic gas and hydrodynamic overprint, whereas Qinshui basin is dominated mainly by thermogenic gas. | WU YuDong JU YiWen HOU QuanLin HU ShengBiao PAN JieNan FAN JunJia | 2011 | Science China Earth Sciences2011，54，7： | 13 |
| 6 | Pressure balance and imbalance in the optic nerve chamber: The Beijing Intracranial and Intraocular Pressure (iCOP) Study显示文摘To determine the interdependence of intracranial pressure(ICP) and intraocular pressure(IOP) and how it affects optic nerve pressures, eight normal dogs were examined using pressure-sensing probes implanted into the left ventricle, lumbar cistern, optic nerve subarachnoid space in the left eye, and anterior chamber in the left eye. This allowed ICP, lumbar cistern pressure(LCP), optic nerve subarachnoid space pressure(ONSP) and IOP to be simultaneously recorded. After establishing baseline pressure levels, pressure changes that resulted from lowering ICP(via shunting cerebrospinal fluid(CSF) from the ventricle) were recorded. At baseline, all examined pressures were different(ICP>LCP>ONSP), but correlated(P<0.001). As ICP was lowered during CSF shunting, IOP also dropped in a parallel time course so that the trans-lamina cribrosa gradient(TLPG) remained stable(ICP-IOP dependent zone). However, once ICP fell below a critical breakpoint, ICP and IOP became uncoupled and TLPG changed as ICP declined(ICP-IOP independent zone). The optic nerve pressure gradient(ONPG) and trans-optic nerve pressure gradient(TOPG) increased linearly as ICP decreased through both the ICP-IOP dependent and independent zones. We conclude that ICP and IOP are coupled in a specific pressure range, but when ICP drops below a critical point, IOP and ICP become uncoupled and TLPG increases. When ICP drops, a rise in the ONPG and TOPG creates more pressure and reduces CSF flow around the optic nerve. This change may play a role in the development and progression of various ophthalmic and neurological diseases, including glaucoma. | Ruowu Hou Zheng Zhang Diya Yang Huaizhou Wang Weiwei Chen Zhen Li Jinghong Sang Sumeng Liu Yiwen Cao Xiaobin Xie Ruojing Ren Yazhuo Zhang Bernhard A. Sabel Ningli Wang | 2016 | Science China(Life Sciences)2016，59，5： | 11 |
| 7 | Heat flow and its coalbed gas effects in the central-south area of the Huaibei coalfield, eastern China显示文摘Based on an analysis of the present geo-temperature field and the thermal conductivity (K) of 62 samples from the central-south area of the Huaibei coalfield in eastern China, we calculated the heat flow and plotted its distribution map. The results show that the average heat flow in the research area is about 60 mW/m2. It is different from other major energy basins in the North China Plate, but has close relationship with the regional geology and the deep geological setting. The heat flow is comparatively higher in the southeastern, central, and northwestern areas than in the northeastern and southwestern areas. The geo-temperature distribution map of the bottom interface of the Permian coal measure was drawn by calculating its embedding depth and geo-temperature gradients. Finally, the present gas generation condition of the Permian coal measure is discussed by associating with the temperature condition, the vitrinite reflectance (Ro), the metamorphism of coal and tectonic-burial evolution. The study indicates all present characters of the Permian coal measure, such as lower present temperature, higher Ro value, middle-high rank coals, and uplift and extension events after the coal measure sediment, are favorable for the generation of secondary biogenic gas, but not thermogenic gas or primary biogenic gas. | TAN JingQiang JU YiWen ZHANG WenYong HOU QuanLin TAN YongJie | 2010 | Science China Earth Sciences2010，53，5： | 9 |
| 8 | Enrichment of heavy metal elements and their adsorption on iron oxides during carbonate rock weathering process显示文摘Analysis of trace elements in the Lower Palaeozoic carbonate rock strata of the Beijing area shows that the Cr, Zn, Cd and Pb contents increase from primary carbonate rocks to weathered carbonate rocks and from primary carbonate rocks to the soil coexisting with carbonate rock. Distributions of Cr, Zn, Cd and Pb have the same trends as that of Fe2O3. Iron oxides play different roles at different stages of weathering of carbonate rock. The adsorption of Cr, Zn, Cd and Pb on Fe2O3 is greater than on FeO in soil. However, FeO, as a main component of clay mineral, is a better adsorbent of Cr, Zn, Cd and Pb than Fe2O3 in weathered and primary carbonate rocks. According to R-type clustering analysis, the main components of carbonate rock are divided into marine and continental sediments. Correlation analysis shows that heavy metal elements mainly exist in continental substances. | Shanqin Ni Yiwen Ju Quanlin Hou Shijie Wang Qing Liu Yudong Wu Lingling Xiao | 2009 | Progress in Natural Science:Materials International2009，19，9： | 8 |
| 9 | Response of Macromolecular Structure to Deformation in Tectonically Deformed Coal显示文摘有不同 deformational 机制和不同 deformational 紧张的构造地使变形的煤(TDC ) 的结构的进化通过 31 上的分析不同变形等级取样的 X 光检查衍射(XRD ) 深入地被调查(Ro,最大:0.7%3.1%) 从 Huaibei 煤田镇定。结果显示在有变态和变丑增加的可锻、易碎的 deformational 煤之间有不同进化特征。随变态的增加,在一方面,原子飞机间距( d002 )在步速度正在减少,叠 BSU 层( Lc )起初正在增加然后减少,但是 BSU 层( La )和 La/Lc 的比率的延期开始正在减少然后增加。为易碎的 deformational 煤,当 deformational 紧张正在增加时,在另一方面, d002 开始正在增加然后减少,它在降低中间或高中间的变态等级下面引起 Lc 和 La 的变化的倒置。在可锻的 deformational 煤,相反, d002 开始减少了然后增加,并且 Lc 的价值随 deformational 的增加减少了紧张。但是 La 的价值在降低中间的变态等级下面增加了并且起初增加了然后在高中间的变态等级下面减少了。我们断定 TDC macromolecular 结构的降级和 polycondensation 能显然在可锻的 deformational 过程期间被影响,因为统一脱臼的增加和累积也许把压力转变成紧张精力。同时,易碎的变丑能把压力转变成部分热能,并且也支持变态和降级。变丑比对可锻、易碎的 deformational 煤的微分进化的变态更重要,这能被结束。 | LI Xiaoshi JU Yiwen HOU Quanlin FAN Junjia | 2013 | Acta Geologica Sinica(English Edition)2013，87，1： | 8 |
| 10 | Geochemical Characters of Water Coproduced with Coalbed Gas and Shallow Groundwater in Liulin Coalfield of China显示文摘To reveal the geochemical characters of water coproduced with coalbed gas and shallow groundwater,water samples were collected from 12 wells of coalbed methane and 7 wells of shallow groundwater.The pH,CODMn,fCO2,total dissolved solids(TDS),total hardness,and concentrations of metasilicic acid,sodium and kalium,calcium ion,magnesium ion,ammonium iron,bicarbonate ion,carbonate,chloride,sulfate ion,nitrate ion,fluoride,lithium,zinc,nickel,manganese,iron,boron,barium,etc.of the samples were measured.Research results showed the following:(1)Concentrations of TDS,chloride,fluoride,sodium and kalium,ammonium,iron,and barium in the water coproduced with coalbed gas exceeded the national standards of China;however,physical,chemical,and biological properties of shallow groundwater could meet the national standard.(2)The water produced from coalbed contained mainly Na–Cl·HCO3,with average TDS of 4588.5 ppm,whereas shallow groundwater contained a mixture of chemicals including Na·Mg·Ca-HCO3·SO4and Na·MgHCO3·SO4,with average TDS of 663.8 ppm.(3)In general,it was observed that bicarbonate and sodium accumulated in a reducing environment and deeper system,while depletion of hydrogen ions and dissolution of sulfate,calcium,and magnesium occurred in a redox environment and shallow system.(4)Sodium and kalium,ammonium,chloride,and bicarbonate ions were the main ions found in the study area. | YANG Mei JU Yiwen LIU Guijian TONG Li KANG Yu HOU Quanlin | 2013 | Acta Geologica Sinica(English Edition)2013，87，6： | 6 |
| 11 | Dihydrocelastrol inhibits multiple myeloma cell proliferation and promotes apoptosis through ERK1/2 and IL-6/STAT3 pathways in vitro and in vivo显示文摘多重骨髓瘤(公里) 是第二很经常的恶意的 hematological 疾病。Dihydrocelastrol (DHCE ) 被 hydrogenated celastrol 综合,从中国药用的植物 Tripterygium regelii 孤立的 treterpene。在这研究,我们首先在公里房间上报导了 DHCE 的反肿瘤活动。我们发现 DHCE 能禁止房间增长并且在 vitro 通过 caspase 依赖的方法支持 apoptosis。另外, DHCE 能使 interleukin (IL ) 的表达式失去活性 -6 和 downregulate 细胞外的调整蛋白质 kinases (ERK1/2 ) 和信号变换器和在公里的抄写 3 的使活跃之物(STAT3 ) 的 phosphorylation。它也面对 IL-6 对公里房间线保留了它的活动。而且,有 DHCE 的公里房间的处理在房间周期的 G 0/G1 阶段导致了房间的累积。尤其是, DHCE 减少了 4 和 6 在公里房间衬里的 cyclin D1 和 cyclin 依赖的 kinases 的表示。另外,它向 MM 房间线的功效能与 histone deacetylase 禁止者 panobinostat (LBH589 ) 在联合被提高,它在公里作为潜在的治疗学的策略暗示了 DHCE 和 LBH589 的联合处理的可能性。另外,有 DHCE 的 NCI-H929 忍受肿瘤的裸体老鼠的处理(10 mg/kg/d, i.p, 1-14 天) 在 vivo 导致了肿瘤生长的 73% 抑制。一起拿,我们的现在的学习的结果显示 DHCE 能禁止细胞的增长并且在骨髓瘤房间导致房间 apoptosis 通过不同机制调停了,可能通过禁止 IL-6/STAT3 和 ERK1/2 小径。并且它可以为公里病人提供一种新治疗学的选择。 | Liangning Hu Huiqun Wu Bo Li Dongliang Song Guang Yang Gege Chen Bingqian Xie Zhijian Xu Yong Zhang Dandan Yu Jun Hou Wenqin Xiao Xi Sun Gaomei Chang Yiwen Zhang Lu Gao Bojie Dai Yi Tao Jumei Shi Weiliang Zhu | 2017 | Acta Biochimica et Biophysica Sinica2017，49，5： | 5 |
| 12 | Coal bed methane sorption related to coal deformation structures at different temperatures and pressures显示文摘 | Pan Jienan Hou Quanlin Ju Yiwen | 2012 | Fuel2012，102，： | 1 |
| 13 | Coalbed methane sorption related to coal deformation structures at different temperatures and pressures显示文摘 | Pan Jienan Hou Quanlin Ju Yiwen | 2012 | Fuel2012，102，1： | 1 |
| 14 | Systematic investigation of millimeter-wave optic modulation performance in thin-film lithium niobate显示文摘Millimeter-wave(mmWave)band(30–300 GHz)is an emerging spectrum range for wireless communication,short-range radar,and sensor applications.mmWave-optic modulators that could efficiently convert mmWave signals into the optical domain are crucial components for long-haul transmission of mmWave signals through optical networks.At these ultrahigh frequencies,however,the modulation performances are highly sensitive to the transmission line loss as well as the velocity-and impedance-matching conditions,while precise measurements and modeling of these parameters are often non-trivial.Here we present a systematic investigation of the mmWave-optic modulation performances of thin-film lithium niobate modulators through theoretical modeling,electrical verifications,and electro-optic measurements at frequencies up to 325 GHz.Based on our experimentally verified model,we demonstrate thin-film lithium niobate mmWave-optic modulators with a measured 3-dB electro-optic bandwidth of 170 GHz and a 6-dB bandwidth of 295 GHz.The device also shows a low RF half-wave voltage of 7.3 V measured at an ultrahigh modulation frequency of 250 GHz.This work provides a comprehensive guideline for the design and characterization of mmWave-optic modulators and paves the way toward future integrated mmWave photonic systems for beyond-5G communication and radar applications. | YIWEN ZHANG LINBO SHAO JINGWEI YANG ZHAOXI CHEN KE ZHANG KAM-MAN SHUM DI ZHU CHI HOU CHAN MARKO LONČAR CHENG WANG | 2022 | Photonics Research2022，10，10： | 1 |
| 15 | Geochemical Characters of Water Coproduced with Coalbed Gas and Shallow Groundwater in Liulin Coalfield of China显示文摘 | Mei YANG Yiwen JU Guijian LIU Li TONG Yu KANG Quanlin HOU | 2013 | Acta Geologica Sinica ‐ English Edition2013，，6： | 1 |
| 16 | Migration and enrichment of trace elements of Lower Palaeozoic carbonate rock strata in Beijing显示文摘Analyses of trace elements of the Lower Palaeozoic carbonate rock strata in Beijing show that the contents of As, Hg, F increase from primary carbonate rocks to weathered carbonate rocks and from primary carbonate rocks to the soil coexisting with carbonate rocks, but the distribution regularity of S is not obvious. In the whole weathered stages, the sorption of As is mainly affected by Fe2O3. In soil Fe2O3 is also the main affecting factor of Hg enrichment. The main existing forms of Hg in primary carbonate rocks should simply be physical adsorption, coprecipitation and false isomorphous form between surface of carbonate rock and Hg. In soil the enrichment of F has little relationship with sul-fides and Fe2O3. In primary carbonate rocks, F is mainly absorbed by sulfides and clay minerals, etc. Weathered samples have closer genetic relationships with primary carbonate rocks. This also implies that weathered carbonate rocks have the close existing forms to that of primary carbonate rocks. In primary carbonate rocks FeS2 and FeS are the main forms of S, and sulfides have fixation effect on some heavy metals, whereas in weathered carbonate rocks and soil the fixation effect is weakened. | NI ShanQin HOU QuanLin JU YiWen XIAO LingLing WU YuDong LIU Qing | 2008 | Science China Earth Sciences2008，51，12： | 1 |
| 17 | A New Parameter as an Indicator of the Degree of Deformation of Coals显示文摘The deformation of coal is effected by thermal effect, pressures and tectonic stress, and the tectonic stress is the principal influence factor. However, the proposition of a useful quantitative index that responds to the degree of deformation of coals quantitatively or semi-quantitatively has been a long-debated issue. The vitrinite reflectance ellipsoid, that is, the reflectance indication surface(RIS) ellipsoid is considered to be a strain ellipsoid that reflects the sum of the strain increment caused by stress in the process of coalification. It has been used to describe the degree of deformation of the coal, but the effect of the anisotropy on the RIS ellipsoid has not yet been considered with regards to non-structural factors. In this paper, Wei's parameter(ε) is proposed to express the deformation degree of the strain ellipsoid based on considering the combined influence of thermal effect, pressure and tectonic stress. The equation is as follows: ε=√[(ε_1-ε_0)~2+(ε_2-ε_0)~2+(ε_3-ε_0)~2]/3, where ε_1=lnR_(max), ε_2=lnR_(int), ε_3=lnR_(min), and ε_0=(ε_1+ε_2+ε_3)/3. Wei's parameter represents the distance from the surface to the spindle of the RIS logarithm ellipsoid; thus, the degree of deformation of the strain ellipsoid is indicated quantitatively. The formula itself, meanwhile, represents the absolute value of the degree of relative deformation and is consequently suitable for any type of deformation of the strain ellipsoid. Wei's parameter makes it possible to compare degrees of deformation among different deformation types of the strain ellipsoid. This equation has been tested in four types of coal: highly metamorphic but weakly deformed coal of the southern Qinshui Basin, highly metamorphic and strongly deformed coal from the Tianhushan coal mining area of Fujian, and medium metamorphic and weakly or strongly deformed coal from the Huaibei Coalfield. The results of Wei's parameters are consistent with the actual deformation degrees of the coal reservoirs determined by other methods, which supports the effectiveness of this method. In addition, Wei's parameter is an important complement to the indicators of the degrees of deformation of coals, which possess certain theoretical significance and practical values. | Mingming Wei Yiwen Ju Quanlin Hou Guochang Wang Liye Yu Wenjing Zhang Xiaoshi Li | 2017 | Journal of Earth Science2017，28，2： | 1 |
| 18 | FTIR and raman spectral research on metamorphism and deformation of coal 显示文摘 | Li Xiaoshi Ju Yiwen Hou Quanlin | 2012 | Journal of Geological Research2012，，4： | 1 |
| 19 | Phase Behaviors of Multi-tailed B_(2)AB_(2)-Type Regio-isomeric Giant Surfactants at the Columnar-Spherical Boundary显示文摘We report herein the precision synthesis and phase behaviors of multi-tailed B_(2)AB_(2)-type regio-isomeric giant surfactants consisting of a hydrophilic polyhedral oligomeric silsesquioxane(POSS)head tethered with four hydrophobic polystyrene(PS)tails.The synthesis was accomplished through two sequential'click'reactions to give a series of regio-isomeric giant surfactants S2DS2(where S is short for PS tails and D for hydroxyl-functionalized POSS)in para-,meta-,and ortho-configurations.Their phase structures and phase be-haviors at the columnar-spherical boundary were investigated with a single PS tail molecular weight of 1.4 kDa.Specifically,the para-and meta-isomers show hexagonally packed cylinders phases with slightly different order-disorder transition temperatures(~120℃ and~130℃)and the ortho-isomer exhibits an order-order transition from a kinetically favored,metastable dodecagonal quasi-crystal phase to a thermodynamically stable sigma phase at~120℃,as well as a further transition into the disordered state at~140℃.The phase diagram was constructed and their differences were rationalized based on the calculated interfacial area per molecule.This work demonstrates that tiny structural disparity could not only lead to unconventional phase formation in single-component macro-molecules,but also render dynamic and rich phase behaviors in these macromolecular assemblies. | Yu Shao Di Han Xiaojin Yan Bo Hou Yiwen Li Jinlin He Qiang Fu Wen-Bin Zhang | 2021 | Chinese Journal of Chemistry2021，39，12： | 0 |
| 20 | Enhanced anaerobic digestion of waste activated sludge with periodate-based pretreatment显示文摘The potential of periodate(PI)in sludge anaerobic digestion is not tapped,although it has recently attracted great research interest in organic contaminants removal and pathogens inactivation in wastewater treatment.This is the first work to demonstrate significant improvement in methane generation from waste activated sludge(WAS)with PI pretreatment and to provide underlying mechanisms.Biochemical methane potential tests indicated that methane yield enhanced from 100.2 to 146.3 L per kg VS(VS,volatile solids)with PI dosages from 0 to 100 mg per g TS(TS,total solids).Electron spin resonance showed PI could be activated without extra activator addition,which might be attributed to the native transition metals(e.g.,Fe2t)in WAS,thereby generating hydroxyl radical(-OH),superoxide radicals(-O2-),and singlet oxygen(1O2).Further scavenging tests demonstrated all of them synergistically promoted WAS disintegration,and their contributions were in the order of-O2->-OH>1O2,leading to the release of substantial biodegradable substances(i.e.,proteins and polysaccharides)into the liquid phase for subsequent biotransformation.Moreover,fluorescence and ultraviolet spectroscopy analyses indicated the recalcitrant organics(especially lignocellulose and humus)could be degraded by reducing their aromaticity under oxidative stress of PI,thus readily for methanogenesis.Microbial community analysis revealed some microorganisms participating in hydrolysis,acidogenesis,and acetoclastic methanogenesis were enriched after PI pretreatment.The improved key enzyme activities and up-regulated metabolic pathways further provided direct evidence for enhanced methane production.This research was expected to broaden the application scope of PI and provide more diverse pretreatment choices for energy recovery through anaerobic digestion. | Haixiao Guo Lixin Tian Yufen Wang Kaixin Zheng Jiaqi Hou Yingxin Zhao Tingting Zhu Yiwen Liu | 2023 | Environmental Science and Ecotechnology2023，，1： | 0 |
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