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| 1 | Exploring Soil Layers and Water Tables with Ground-Penetrating Radar显示文摘Ground-penetrating radar (GPR) has been used predominantly for environments with low electrical conductivity like freshwater aquifers, glaciers, or dry sandy soils. The objective of the present study was to explore its application for mapping in subsurface agricultural soils to a depth of several meters. For a loamy sand and a clayey site on the North China Plain, clay inclusions in the sand were detected; the thickness, inclination, and continuity of the confining clay and silt layers was assessed; and a local water table was mapped. Direct sampling (soil coring and profiling) in the top meter and independent measurement of the water table were utilized to confirm the findings. Also, effective estimates of the dielectric number for the site with the dielectric number of moist clayey soils depending strongly on frequency were obtained. Thus, important properties of soils, like the arrangement and type of layers and in particular their continuity and inclination, could be explored with moderate efforts for rather large areas to help find optimal locations for the time-consuming and expensive measurements which would be necessary to detail a model of the subsurface. | K.ROTH U.WOLLSCHLAGER CHENGZhu-Hua ZHANGJia-Bao | 2004 | Pedosphere2004，14，3： | 11 |
| 2 | Field-Scale Contaminant Transport Through Soils:Current Understanding and Open Questions显示文摘Agro-chemical transport processes at different scales are discussed and relevant opening questions areidentified by literature review to make some suggestions concerning the improvement of research methods forfield scale solute transport by aid of evaluation of existing models, and examining transport behaviors of solutein vadose zones on different scales. The results indicate that present research progress and understanding onfield scale solute transport have not yet been enough to guarantee the use of our models for the management offield solute movement. Much more research work needs to be done, particularly, in aspects of high resolutionof spatial structures relevant to the hydraulic and transport properties, explicit numerical simulation of actualstructure on field scale and field measurement corroborated with model development. | ZHANGJIABAO K.ROTH | 1999 | Pedosphere1999，9，4： | 1 |
| 3 | 应用比较性基因组杂交作染色体畸变定量分析的程序显示文摘比较性基因组杂交(CGH)可用以检查肿瘤DNA的过表达及低表达。进行CGH定量分析的前提是必须将分子细胞遗传学、荧光显微术及数字化图像处理等3种方法紧密结合起来。这一分析程序的基础是载有正常中期染色体的载玻片,其中含有已经原位杂交标记了的待检和对照的DNA。 对所测标本必须完成如下步骤:荧光图像拍摄、荧光图像的光学调整、强度标准化以计算RATIO图像、制成核型图、CGH总核型图计算、结果评估。 | K.Roth G.Wolf M.Dietel I.Petersen 阮幼冰 | 1998 | 德国医学1998，15，2： | 0 |
| 4 | An optimized medial parapatellar approach to the goat medial femoral condyle显示文摘Goats or sheep are the preferred animal model for the preclinical evaluation of cartilage repair techniques due to the similarity of the goat stifle joint to the human knee.The medial femoral condyle of the stifle joint is the preferred site for the assessment of articular cartilage repair,as this is the primary location for this type of lesion in the human knee.Proper surgical exposure of the medial femoral condyle is paramount to obtain reproducible results without surgical error.When applying the standard human medial arthrotomy technique on the goat stifle joint,there are some key aspects to consider in order to prevent destabilization of the extensor apparatus and subsequent postoperative patellar dislocations with associated animal discomfort.This paper describes a modified surgical technique to approach the medial femoral condyle of the caprine stifle joint.The modified technique led to satisfactory exposure without postoperative incidence of patellar luxations and no long-term adverse effects on the joint. | Pieter P.W.van Hugten Ralph M.Jeuken Alex K.Roth Saskia Seeldrayers Peter J.Emans | 2021 | Animal Models and Experimental Medicine2021，4，1： | 0 |
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