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1Thermal regimes and degradation modes of permafrost along the Qinghai-Tibet Highway显示文摘Permafrost on the Qinghai-Tibet Plateau (QTP) is widespread, thin, and thermally unstable. Under a warming climate during the past few decades, it has been degrading extensively with generally rising ground temperatures, the deepening of the maximum summer thaw, and with lessening of the winter frost penetration. The permafrost has degraded downward, upward and laterally. Permafrost has thinned or, in some areas, has totally disappeared. The modes of permafrost degradation have great significance in geocryology, in cold regions engineering and in cold regions environmental management. Permafrost in the interior of the QTP is well represented along the Qing-hai-Tibet Highway (QTH), which crosses the Plateau through north to south and traverses 560 km of permafrost-impacted ground. Horizontally, the degradation of permafrost occurs more visibly in the sporadic permafrost zone in the vicinity of the lower limit of permafrost (LLP), along the margins of taliks, and around permafrost islands. Downward degradation develops when the maximum depth of seasonal thaw exceeds the maximum depth of seasonal frost, and it generally results in the formation of a layered talik disconnecting the permafrost from the seasonal frost layer. The downward degrada- tion is divided into four stages: 1) initial degradation, 2) accelerated degradation, 3) layered talik and 4) finally the conversion of permafrost to seasonally frozen ground (SFG). The upward degradation occurs when the geothermal gradient in permafrost drops to less than the geothermal gradients in the underlying thawed soil layers. Three types of permafrost temperature curves (stable, degrading, and phase-changing transitory permafrost) illustrate these modes. Although strong differentiations in local conditions and permafrost types exist, the various combinations of the three degradation modes will ultimately transform permafrost into SFG. Along the QTH, the downward degradation has been proceeding at annual rates of 6 to 25 cm, upward degradation at 12 to 30 cm, and lateral degradation in the sporadic permafrost zone at 62 to 94 cm during the last quarter century. These rates exceed the 4 cm per year for the past 20 years reported for the discontinuous permafrost zone in subarctic Alaska, the 3 to 7 cm per year reported in Mongolia, and that of the thaw-stable permafrost in subarctic Yakutia and Arctic Alaska.JIN Huijun ZHAO Lin WANG Shaoling JIN Rui 2006Science China Earth Sciences2006,49,11:50
2Thawing and freezing processes of active layer in Wudaoliang region of Tibetan Plateau显示文摘The interaction between permafrost and atmosphere is accomplished through transfer of heat and moisture in the overlay active layer. Thus, the research on the thermal and hydrodynamics of active layer during the thawing and freezing processes was considered a key to revealing the heat and moisture exchanges between permafrost and atmosphere. The monitoring and research on active layer were conducted because permafrost occupies about two thirds of the total area of the Tibetan Plateau. Based on the analysis of the ground temperature data and soil moisture data of monitoring near the Wudaoliang region of the Tibetan Plateau, the thawing and freezing processes of active layer were divided into four stages, i.e. summer thawing stage (ST), autumn freezing stage (AF), winter cooling stage (WC) and spring warming stage (SW). Coupled heat and water flow is much more complicated in ST and AF, and more amount of water is migrating in these two stages. Heat is transferred mainly via conductive heat flow in theLin Zhao Guodong Cheng Shuxun Li Xinmin Zhao Shaoling Wang 2000Chinese Science Bulletin2000,45,23:31
3Spatiotemporal variability of permafrost degradation on the Qinghai-Tibet Plateau显示文摘Based on data from six meteorological stations in the permafrost regions, 60 boreholes for long-term monitoring of permafrost temperatures, and 710 hand-dug pits and shallow boreholes on the Qinghai-Tibet Plateau (QTP), the spatiotemporal variability of permafrost degradation was closely examined in relation to the rates of changes in air, surface, and ground temperatures. The de-cadal averages and increases in the mean annual air temperatures (MAATs) from 1961-2010 were the largest and most persistent during the last century. MAATs rose by 1.3℃, with an average increase rate of 0.03℃/yr. The average of mean annual ground surface temperatures (MAGSTs) increased by 1.3℃ at an average rate of 0.03℃/yr. The rates of changes in ground temperatures were -0.01 to 0.07℃/yr. The rates of changes in the depths of the permafrost table were -1 to +10 cm/yr. The areal extent of permafrost on the QTP shrank from about 1.50×106 km2 in 1975 to about 1.26×106 km2 in 2006. About 60% of the shrinkage in area of permafrost occurred during the period from 1996 to 2006. Due to increasing air temperature since the late 1980s, warm (>-1℃) permafrost has started to degrade, and the degradation has gradually expanded to the zones of transitory (-1 to -2℃) and cold (<-2℃) permafrost. Permafrost on the southern and southeastern plateau degrades more markedly. It is projected that the degradation of permafrost is likely to accelerate, and substantial changes in the distributive features and thermal regimes of permafrost should be anticipated. However, regarding the relationships between degrading permafrost and the degradation of rangelands, it is still too early to draw reliable conclusions due to inadequate scientific criteria and evidence.HuiJun Jin DongLiang Luo ShaoLing Wang LanZhi Lv JiChun Wu 2011Research in Cold and Arid Regions2011,3,4:16
4Monitoring of frozen soil hydrology in macro-scale in the Qinghai-Xizang Plateau显示文摘Monitoring of frozen soil hydrology in macro-scale was performed by Chinese and Japanese scientists from 1997 to 1998. Quality measured data were obtained. Measured data on soil moisture and temperature are preliminarily analyzed. Based on profiles of soil temperature and moisture in individual measured sites, intra-annual freezing and melting process of soil is discussed. Maximum frozen and thawed depths and frozen days in various depths are estimated. The work emphasized the spatial distribution on soil temperature and moisture in macro-scale and the effect of topography on conditions of soil water and heat.Yongjian Ding Baisheng Ye Shiying Liu Yongping Shen Shaoling Wang Meixie Yang 2000Chinese Science Bulletin2000,45,12:13
5Porphyromonas gingivalis disrupts vascular endothelial homeostasis in a TLR-NF-κB axis dependent manner显示文摘Cardiovascular disease is still the leading cause of mortality worldwide.Vascular endothelial dysfunction is viewed as the initial step of most cardiovascular diseases.Many studies have indicated that periodontal pathogens,especially Porphyromonas gingivalis,are closely correlated with vascular endothelial homeostasis,but the function of P.gingivalis and the underlying mechanisms are still elusive.To illuminate the effects and elucidate the mechanisms of P.gingivalis on endothelial structural integrity,we developed P.gingivalis infection models in vivo and in vitro.Endothelial cell proliferation,differentiation and apoptosis were detected.Here,we showed that P.gingivalis can impair endothelial integrity by inhibiting cell proliferation and inducing endothelial mesenchymal transformation and apoptosis of endothelial cells,which reduce the cell levels and cause the endothelium to lose its ability to repair itself.A mechanistic analysis showed that TLR antagonist or NF-κB signalling inhibitor can largely rescue the damaged integrity of the endothelium caused by P.gingivalis,suggesting that TLR-NF-κB signalling plays a vital role in vascular endothelial homeostasis destroyed by P.gingivalis.These results suggest a potential intervention method for the prevention and treatment of cardiovascular disease.Mengru Xie Qingming Tang Shaoling Yu Jiwei Sun Feng Mei Jiajia Zhao Lili Chen 2020International Journal of Oral Science2020,12,3:9
6Study on Biogenic Amines in Various Dry Salted Fish Consumed in China显示文摘This study was carried out to investigate the biogenic amines(BAs), physicochemical property and microorganisms in dry salted fish, a traditional aquatic food consumed in China. Forty three samples of dry salted fish were gathered from retail and wholesale markets and manufacturers, which had been produced in various regions in China. Cadaverine(CAD) and putrescine(PUT) were quantitatively the most common biogenic amines. About 14% of the samples exceeded the histamine content standards established by the FDA and/or EU. The highest histamine content was found in Silver pomfret(Pampus argenteus)(347.79 mg kg^(-1)). Five of forty three samples exceeded the acceptable content of TYR(100 mg kg^(-1)), and 23.26% of dried-salted fish contained high contents of biogenic amines(above 600 mg kg^(-1)). In addition, species, regions, pickling processes and drying methods made the physicochemical property, microorganisms and biogenic amines in dry salted fish to be different to some extents. The total plate count(TPC) was much higher than that of total halophilic bacteria in all samples. The biogenic amines, physicochemical property and microbiological counts exhibited large variations among samples. Furthermore, no significant correlation between biogenic amines and physicochemical property and TPC was observed. This study indicated that dry salted fish may still present healthy risk for BAs, depending on the processing methods, storage conditions among others.WU Yanyan CHEN Yufeng LI Laihao YANG Xianqing YANG Shaoling LIN Wanling ZHAO Yongqiang DENG Jianchao 2016Journal of Ocean University of China2016,15,4:8
7Satellite-derived surface water pCO_2 and air-sea CO_2 fluxes in the northern South China Sea in summer显示文摘An empirical approach is presented for the estimation of the partial pressure of carbon dioxide (pCO2) and air-sea CO2 fluxes in the northern South China Sea in summer using satellite-derived sea surface temperatures (SSTs), chlorophyll-a (Chl a) concentrations, and wind fields. Two algorithms were tested. The first used an SST-dependent equation, and the other involved the introduction of Chl a. Regression equations were developed for summer based on in situ data obtained in July, 2004. Using the monthly average SST and Chl a fields derived from the advanced very high resolution radiometer (AVHRR) and the SeaWiFS (sea-viewing wide field of view sensor), respectively, the monthly pCO2 fields were computed. The derived pCO2 was compared with the shipboard pCO2 observations conducted in July, 2000. This resulted in a root-mean-square error of 4.6 latm, suggesting that the satellite-derived pCO2 was in general agreement with the in situ observations. The air-sea CO2 flux was further computed with the aid of the monthly mean QuikSCAT wind speed. We contend that more shipboard data are necessary for refining the empirical algorithms and reducing the uncertainty in the results.Yu Zhu Shaoling Shang Weidong Zhai Minhan Dai 2009Progress in Natural Science:Materials International2009,19,6:7
8Evolution of permafrost in China during the last 20 ka显示文摘The formation and evolution of permafrost in China during the last 20 ka were reconstructed on the basis of large amount of paleo-permafrost remains and paleo-periglacial evidence, as well as paleo-glacial landforms, paleo-flora and paleofauna records. The results indicate that, during the local Last Glacial Maximum(LLGM) or local Last Permafrost Maximum(LLPMax), the extent of permafrost of China reached 5.3×106-5.4×106 km2, or thrice that of today, but permafrost shrank to only0.80×106-0.85×106 km2, or 50% that of present, during the local Holocene Megathermal Period(LHMP), or the local Last Permafrost Minimum(LLPMin). On the basis of the dating of periglacial remains and their distributive features, the extent of permafrost in China was delineated for the two periods of LLGM(LLPMax) and LHMP(LLPMin), and the evolution of permafrost in China was divided into seven periods as follows:(1) LLGM in Late Pleistocene(ca. 20000 to 13000-10800 a BP)with extensive evidence for the presence of intensive ice-wedge expansion for outlining its LLPMax extent;(2) A period of dramatically changing climate during the early Holocene(10800 to 8500-7000 a BP) when permafrost remained relatively stable but with a general trend of shrinking areal extent;(3) The LHMP in the Mid-Holocene(8500-7000 to 4000-3000 a BP)when permafrost degraded intensively and extensively, and shrank to the LLPMin;(4) Neoglaciation during the late Holocene(4000-3000 to 1000 a BP, when permafrost again expanded;(5) Medieval Warming Period(MWP) in the late Holocene(1000-500 a BP) when permafrost was in a relative decline;(6) Little Ice Age(LIA) in the late Holocene(500-100 a BP), when permafrost relatively expanded, and;(7) Recent warming(during the 20 th century), when permafrost continuously degraded and still is degrading. The paleo-climate, geography and paleopermafrost extents and other features were reconstructed for each of these seven periods.Huijun JIN Xiaoying JIN Ruixia HE Dongliang LUO Xiaoli CHANG Shaoling WANG Sergey S MARCHENKO Sizhong YANG Chaolu YI Shijie LI Stuart A HARRIS 2019Science China Earth Sciences2019,62,8:6
9Modulation of Dishevelled and Vangl2 by All-trans-retinoic Acid in the Developing Mouse Central Nervous System and its Relationship to Teratogenesis显示文摘对到 all-trans-retinoic 酸(RA ) 的暴露的反应在 embryogenesisvaries 从期间对严重产生畸形的效果生理并且在剂量和在所有 species.Vangl2 和凌乱的基因的开发的阶段之上的依赖者在建立平面房间极性并且在神经轴胚时期期间调整会聚的扩展运动起关键作用。调停 ofRA 的畸形生长可能由于它的错误规定的效果 Vangl2 和凌乱的基因。这研究的目的是监视 Vangl2 的调整并且在在神经轴胚时期期间与 RA 的 30 mg/(kg 身体重量) 的单个口头的剂量跟随母亲的处理的 Kunming 鼠标胚胎弄乱。到 RA 的 7.75 个 d 胚胎的暴露导致了明显的外部效果是的典型词法 changes.Themost 在中脑的神经试管闭合和在 10 个 d 胚胎的前脑区域的失败,导致 exencephaly ,在以后的 embryos.RA ,处理也在母亲的处理以后在 66 h 在 4 和 18 h 和显著增加导致了 Vangl2 mRNA 的显著减少由反向的抄写聚合酶链反应检测了。在母亲的 treatment.Dishevelled1/2/3 mRNA 在在在在 RA 处理以后的胎儿的 42 h 调整andup 的 4 和 18 h 是显著地下面调整的以后,蛋白质印迹分析在 66 和 90 h 在 18 和 42 h 和显著增加显示出 Vangl2 蛋白质的显著减少,除了 Dishevelled3 at66 h.The Dishevelled2 的一条起来规定, mRNA 和它的蛋白质匹配对方。这些结果暗示 Vangl2 和凌乱的基因可能参加鼠标胚胎的 RA 畸形生长。Yanping ZHANG Kai LIU Yingmao GAO Shaoling LI 2007Acta Biochimica et Biophysica Sinica2007,39,9:5
10Unbiased subgenome evolution following a recent whole-genome duplication in pear(Pyrus bretschneideri Rehd.)显示文摘Genome fractionation(also known as diploidization)frequently occurs following paleopolyploidization events.Biased fractionation between subgenomes has been found in some paleo-allopolyploids,while this phenomenon is absent in paleo-autopolyploids.Pear(Pyrus bretschneideri Rehd.)experienced a recent whole-genome duplication(WGD,~30 million years ago);however,the evolutionary fate of the two subgenomes derived from this WGD event is not clear.In this study,we identified the two paleo-subgenomes in pear using peach(Prunus persica)as an outgroup and investigated differences in the gene loss rate,evolutionary rate,gene expression level,and DNA methylation level between these two subgenomes.Fractionation bias was not found between the two pear subgenomes,which evolved at similar evolutionary rates.The DNA methylation level of the two subgenomes showed little bias,and we found no expression dominance between the subgenomes.However,we found that singleton genes and homeologous genes within each subgenome showed divergent evolutionary patterns of selective constraints,expression and epigenetic modification.These results provide insights into subgenome evolution following paleopolyploidization in pear.Qionghou Li Xin Qiao Hao Yin Yuhang Zhou Huizhen Dong Kaijie Qi Leiting Li Shaoling Zhang 2019Horticulture Research2019,6,1:4
11Evolution of a coastal upwelling event during summer 2004 in the southern Taiwan Strait显示文摘A coastal upwelling event in the southern Taiwan Strait (STWS) was investigated using intensive cruise surveys (four repeated transects in a month) and satellite data in July and early August 2004.The extensive upwelling-associated surface cold water was first observed in early July (~2.0×10 4 km 2) along the STWS coast.Then,the cold surface water reduced in size by ~50% with decreased chlorophyll concentrations after 15 days,indicating the weakening of the upwelling event.At the end of July,the cold surface water disappeared.The temporal variations of the surface cold water and the 3-D hydrography around Dongshan Island are thought to be mainly attributed to the weakened upwelling-favorable southwestern wind,the asymmetric spatial structure of the wind field and the intrusion of warm water from the northern South China Sea.ZHANG Caiyun HONG Huasheng HU Chuanmin SHANG Shaoling 2011Acta Oceanologica Sinica2011,30,1:4
12Fiber Laser Based Hydrophone Systems显示文摘我们报导我们分布式的反馈纤维激光上的最近的工作基于水中听音器。与敏感有关的一些问题例如纤维激光阶段状况,解调,并且包装,也被讨论。与适当数字信号处理(DSP ) 的发展技术和包装图案,一种 interferometric 类型散布了反馈(DFB ) 有 58.0 dB 敳獲? 慥档攠慮汢湩 ? 楤晦牥湥 ? 慭整楲污瀠潲散獳湩 ?敲楧敭 sAsrul Izam AZMI Ian LEUNG Xiaobao CHEN Shaoling ZHOU Qing ZHU Kan GAO Paul CHILDS Gangding PENG 2011Photonic Sensors2011,1,3:3
13The Variation of Stone Cell Content in 236 Germplasms of Sand Pear(Pyrus pyrifolia)and Identification of Related Candidate Genes显示文摘Stone cells have been described to substantially influence pear fruit quality,as lignin and cellulose are the main components of stone cells.However,there are limited studies on the relationship between the variation and molecular basis of stone cells,lignin and cellulose content among different pear varieties.Here,to reveal the variation of stone cell content within different cultivated species,we collected 236 germplasms of sand pear(Pyrus pyrifolia)at 50 days after flower blooming(DAFB),the key stage of stone cell formation.In our results,we measured the content of stone cells,lignin and cellulose and found that these contents ranged from2.82%to 29.00%,8.84%to 55.30%and 11.52%to 30.55%,respectively.Further analysis showed that the variation coefficient of stone cell,lignin and cellulose content was 39.10%,28.03%and 16.71%,respectively.Additionally,a significant correlation between stone cell,lignin and cellulose content were detected,and the correlation coefficient between the contents of stone cell and lignin(0.912)was higher than between the contents of stone cell and cellulose(0.796).Moreover,the average lignin content(29.73%)was higher than the average cellulose content(18.03%)in stone cells in pear fruits,indicating that lignin is the main component of stone cell in pears.Finally,on the basic of the transcriptome data,we identified 10 transcription factors belonging to bHLH,ERF,MYB,and NAC transcript families,which might be involved in lignin formation in stone cells.qRT-PCR experiments verified coincident trends between expression of candidate genes and stone cell content.This research laid foundation for future studies on genetic variation of stone cells in pear fruits and provided important gene resources for stone cell regulation.Jiaying Zhang Jiaming Li Cheng Xue Runze Wang Mingyue Zhang Kaijie Qi Jing Fan Hongju Hu Shaoling Zhang Jun Wu 2021Horticultural Plant Journal2021,7,2:3
14The involvement of PybZIPa in light-induced anthocyanin accumulation via the activation of PyUFGT through binding to tandem G-boxes in its promoter显示文摘To gain insight into how anthocyanin biosynthesis is controlled by light in fruit,transcriptome and metabolome analyses were performed in the Chinese sand pear cultivar“Mantianhong”(Pyrus pyrifolia)after bagging and bag removal.We investigated transcriptional and metabolic changes and gene-metabolite correlation networks.Correlation tests of anthocyanin content and transcriptional changes revealed that 1,530 transcripts were strongly correlated with 15 anthocyanin derivatives(R2>0.9,P-value<0.05),with the top 130 transcripts categorized as being associated with flavonoid metabolism,transcriptional regulation,and light signaling.The connection network revealed a new photosensitive transcription factor,PybZIPa,that might play an important role during light-induced anthocyanin accumulation.The overexpression of PybZIPa promoted anthocyanin accumulation in pear and strawberry fruit as well as tobacco leaves.Dual luciferase and Y1H assays further verified that PybZIPa directly activated the expression of PyUFGT by binding to tandem G-box motifs in the promoter,which was key to differential anthocyanin accumulation in debagged pear skin,and the number of G-box motifs affected the transcriptional activation of PyUFGT by PybZIPa.The results indicate that the light-induced anthocyanin biosynthesis regulatory mechanism in pear differs from that described in previous reports suggesting that a bZIP family member co-regulates anthocyanin biosynthesis with other transcription factors in apple and Arabidopsis.It was found that,in response to light,PybZIPa promoted anthocyanin biosynthesis by regulating important transcription factors(PyMYB114,PyMYB10,and PyBBX22)as well as structural genes(PyUFGT)via binding to G-boxes within promoters.This activation was amplified by the self-binding of PybZIPa to activate its own promoter.Overall,we demonstrate the utility of a multiomics integrative approach for discovering new functional genes and pathways underlying light-induced anthocyanin biosynthesis.Hainan Liu Jun Su Yangfan Zhu Gaifang Yao Andrew C.Allan Charles Ampomah-Dwamena Qun Shu Kui Lin-Wang Shaoling Zhang Jun Wu 2019Horticulture Research2019,6,1:3
15PbMC1a/1b regulates lignification during stone cell development in pear(Pyrus bretschneideri)fruit显示文摘Programmed cell death(PCD)and secondary cell wall(SCW)thickening in pear fruit are accompanied by the deposition of cellulose and lignin to form stone cells.Metacaspase is an important protease for development,tissue renewal and PCD.The understanding of the molecular mechanism whereby pear(Pyrus)metacaspase promotes PCD and cell wall lignification is still limited.In this study,the Metacaspases gene family(PbMCs)from P.bretschneideri was identified.PbMC1a/1b was associated with lignin deposition and stone cell formation by physiological data,semiquantitative real-time polymerase chain reaction(RT-PCR)and quantitative RT-PCR(qRT-PCR).Relative to wildtype(WT)Arabidopsis,the overexpression of PbMC1a/1b increased lignin deposition and delayed growth,thickened the cell walls of vessels,xylary fibers and interfascicular fibers,and increased the expression of lignin biosynthetic genes.Yeast two-hybrid(Y2H),bimolecular fluorescence complementation(BiFC)and GST pull-down assays indicated that the PbMC1a/1b protein physically interacted with PbRD21.Simultaneously,the transient expression of PbMC1a/1b and PbRD21 led to significant changes in the expression of genes and lignin contents in pear fruits and flesh calli.These results indicate that PbMC1a/1b plays an important role in cell wall lignification,possibly by interacting with PbRD21 to increase the mRNA levels of some lignin synthesis-associated genes and promote the formation of stone cells in pear fruit.Xin Gong Zhihua Xie Kaijie Qi Liangyi Zhao Yazhou Yuan Jiahui Xu Weikang Rui Katsuhiro Shiratake Jianping Bao Shahrokh Khanizadeh Shaoling Zhang Shutian Tao 2020Horticulture Research2020,7,1:3
16A preliminary study of the variation of phytoplankton absorption coefficients in the northern South China Sea显示文摘The temporal and spatial variabilities of phytoplankton absorption coefficients (a ph (λ)) and their relationships with physical processes in the northern South China Sea were examined, based on in situ data collected from two cruise surveys during May 14 to 25, 2001 and November 2 to 21, 2002. Significant changes in the surface water in a ph values and B/R ratios (a ph (440)/a ph (675)) were observed in May, which were caused by a phytoplankton bloom on the inner shelf stimulated by a large river plume due to heavy precipitation. This is consistent with the observed one order of magnitude elevation of chlorophyll a and a shift from a pico/nano dominated phytoplankton community to one dominated by micro-algae. Enhanced vertical mixing due to strengthened northeast monsoon in November has been observed to result in higher surface a ph (675) (0.002–0.006 m-1 higher) and less pronounced subsurface maximum on the outer shelf/slope in November as compared with that in May. Measurements of a ph and B/R ratios from three transects in November revealed a highest surface a ph (675) immediately outside the mouth of the Zhujiang (Pearl) River Estuary, whereas lower a ph (675) and higher B/R ratios were featured in the outer shelf/slope waters, demonstrating the respective influence of the Zhujiang River plume and the oligotrophic water of the South China Sea. The difference in spectral shapes of phytoplankton absorption (measured by B/R ratios and bathochromic shifts) on these three transects infers that picoprocaryotes are the major component of the phytoplankton community on the outer shelf/slope rather than on the inner shelf. A regional tuning of the phytoplankton absorption spectral model (Carder et al., 1999) was attempted, demonstrating a greater spatial variation than temporal variation in the lead parameter a 0 (λ). It was thus implicated that region-based parameterization of ocean color remote sensing algorithms in the northern South China Sea was mandatory.WU Jingyu HONG Huasheng SHANG Shaoling DAI Minhan LEE Zhongping LI Shaojing 2009Acta Oceanologica Sinica2009,28,5:2
17Treatment of PC-3 cells with ultrasound combined with microbubbles induces distinct alterations in the expression of Bcl-2 and Bax显示文摘The objective of the present study was to investigate whether ultrasound combined with microbubbles induces apoptotic cell death in androgen-independent prostate cancer cells and to identify the probable mechanism.We used ultrasound in continuous wave mode with a frequency of 21 kHz and a spatial-average temporal-average intensity of 46 mW/cm2.Ultrasound combined with microbubbles(200μL SonoVue)was used to treat androgen-independent human prostate cancer PC-3 cells for 30 s.PC-3 cells were divided into three groups:the control group,the ultrasound group and the ultrasound combined with microbubbles group.Immediately after treatment,trypan blue exclusion was used to assess cell viability.Cell apoptosis at 24 h after treatment was measured using transmission electron microscopy and flow cytometry.Western blotting was used to evaluate the expression of the apoptosis-related proteins,Bcl-2 and Bax.Ultrasound combined with microbubbles had a minimal effect on the viability of PC-3cells and induced minimal levels of cell lysis.The level of apoptosis in PC-3 cells induced by this modality was significantly higher than in controls(12.77±0.31%vs.2.56±0.22%,P<0.01).Treatment with ultrasound combined with microbubbles increased the expression of Bax,a pro-apoptotic protein,and decreased the expression of Bcl-2,an anti-apoptotic protein.It was concluded that ultrasound combined with microbubbles induces apoptotic cell death in human prostate cancer PC-3 cells through down-regulation of Bcl-2 and up-regulation of Bax.BAI WenKun YANG ShaoLing SHEN E ZHANG JiZhen SHEN ZhiYong HU Bing 2013Chinese Science Bulletin2013,58,28:2
18REMOTE SENSING OF ALGAL BLOOMS USING A TURBIDITY-FREE FUNCTION FOR NEAR-INFRARED ANDRED SIGNALS显示文摘This article presents a method for real- time mapping of algal blooms in turbid coastal waters using the remote sensing reflectance of red band (Channel 1, 580-680 nm) and near-infrared band (Channel 2, 720-1100 nm) of the AVHRR sensor on the NOAA series satellites. A turbidity-free function for near-infrared and red signals, α0 = (bb(1)/bb(2))(a(2)/ a(1)) based on the first order bb/(a+bb) model deduc-ing equation Rrs(2)?1 = α0 Rrs(1) ?1+ g?1 (1?α0), were se-lected as a chlorophyll-a related index for detecting algal blooms, and the algal blooms with chlorophyll-a concentration of 64-256 mg/L could be defined by window of 1.6 < α0 < 5.2 and 0.01< Rrs(2)/g < 0.2. Such turbidity-free two-band method is supported by both sea-truth data and remote sensing experiment for an algal blooms event on the near-shore water off the Minjiang estuary of southeastern China during early June of 2003. Comparisons of this algorithm with other published algorithms, one-band method (i.e. method of bright water) or two-band methods (i.e. method of ratio, method of NDVI, and method of subtracting) have suggested that the turbidity-free function method could be regarded as a standard algorithm in capabilities of AVHRR imagery or other high resolution but wide near-infrared and red band imagery for detecting algal blooms events in coastal waters.LI Yan SHANG Shaoling ZHANG Caiyun MA Xiaoxin HUANG Liwei WU Jingyu ZENG Yindong 2006Chinese Science Bulletin2006,51,4:2
19The preparation and the in-vitro pharmacodynamics study of the intracapsular sustained-release preparations for the prevention of posterior capsule opacification显示文摘Docetaxel-loaded sustained-release preparation based on 2-Hydroxyethyl methacrylate(HEMA)and Methyl methacrylate(MMA)cross-linked copolymer(P(HEMA-co-MMA))was prepared to examine the potential use for preventing posterior capsule opacification(PCO).The preparations were prepared by polymerizing the mixture of HEMA,MMA,cross-linking agent(EGDMA),initiator(AIBN)and docetaxel.The influence factors and mechanism of drug release were studied in the experiments.FT-IR,X-RD and SEM methods were used to characterize the polymer(P(HEMA-co-MMA))and docetaxel-loaded sustained-release preparations.Biocompatibility of P(HEMA-co-MMA)and in-vitro effect of docetaxel-loaded sustained-release preparations were also evaluated.The results showed that docetaxel could release sustainedly from these preparations prepared by cross-linking polymerization.And the release rate could be accelerated by increasing the MMA ratio or EGDMA ratio of the polymer.Release mechanism of docetaxel fitted the Higuchi model well.The results of IR and X-RD showed that only a hydrogen bond was formed between docetaxel and P(HEMA-co-MMA).Docetaxel dispersed in P(HEMA-co-MMA)in amorphous form.The elution test showed that P(HEMA-co-MMA)had good biocompatibility and the in-vitro pharmacodynamics study proved that docetaxel could release stably from the preparations and inhibit HLECs’proliferation.The docetaxel-loaded sustained-release preparations proved to be a promising therapy for preventing PCO.These results also lay a theoretical and experimental foundation for the future.Qian Dong Shaoling Yi Zihang Peng Chunshun Zhao 2013Asian Journal of Pharmaceutical Sciences2013,8,4:2
20Evaluation of the volatile profile of 33 Pyrus ussuriensis cultivars by HS-SPME with GC–MS显示文摘Gaihua Qin Shutian Tao Yufen Cao Juyou Wu Huping Zhang Wenjiang Huang Shaoling Zhang 2012Food Chemistry2012,,4:2
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