Results 21 to 30 of about 3,103 (156)
Constructhion and Eukaryotic Expression of FBXW7α and Effects On Migrationof Cholangiocarcinoma Cell [PDF]
, 2015 胆管癌是起源于胆管上皮的一种恶性肿瘤，近年来在全球的发病率逐年升 高，目前占据消化道肿瘤的3%,胆管癌患者5年生存率不足5%；并且这一状况 30年未曾改变。由于起病隐匿，发现比较困难，手术效果并不理想；为此我们 寄希望于采取新一代的基因诊断提高发现率；有人对人类多种肿瘤做了基因突变 测定，发现FBXW7在胆管癌中突变率较高。FBXW7有三种亚型，分别为FBXW7 α、FBXW7β和FBXW7γ；FBXW7α含有一个F-box基序，该基序直接与Skp 蛋白结合构成完整的SCF(Skp-cullin-F ...
翁中海
core
Rare Metals, EarlyView.ABSTRACT The development of sodium‐ion batteries (SIBs) is limited by slow charge transfer kinetics and large material volume changes caused by the large radius of Na+. Leveraging the excellent physicochemical properties and unique heterostructures of metal selenides, ultrafine hetero‐CuFeSe2‐CoSe2 nanoparticles are in situ wrapped by ...
Ying Zhu +5 more
wiley +1 more source
Shuitu Baochi Xuebao, 2017 通过连续5年定位试验，以紫云英、秸秆和商品有机肥等有机物料还田的稻田土壤为研究对象，研究有机物料还田后不同物理分组下土壤组成特点和有机碳变化特征。结果表明，稻田土壤团聚体主要分布在2～0.25 mm与0.25～0.053 mm粒级，团聚体颗粒有机碳含量随着粒径的减小而减少。有机物料还田可提高0.25～0.053 mm和＜0.053 mm粒级团聚体有机碳的含量，紫云英、秸秆、商品有机肥等有机物料可通过提高土壤微团聚体有机碳含量而增加土壤碳库。有机物料施用增加土壤轻组组分颗粒含量，减少重组组分颗粒含量 ...
俞巧钢, 邹, 顾国平
doaj
Microstructure and ultrastructure of antennary gland of Penaeus monodon(斑节对虾触角腺的显微和超微结构)
Zhejiang Daxue xuebao. Lixue ban, 2007 对斑节对虾触角腺的显微及超微形态结构进行了研究.其触角腺由体腔囊、迷路和原肾管3部分组成.体腔囊足细胞小，足突起短而细，胞质内小泡和颗粒不多；迷路细胞微绒毛短少而不整齐，含有大量小泡，基底及两侧质膜内陷较深，但基底部线粒体数量很少；原肾管细胞微绒毛较短少而杂乱，胞质内小泡和颗粒含量较少，基底及两侧质膜内陷很深.上述结果显示，斑节对虾触角腺各组成成分中，与其排泄和渗透压调节功能相关的结构较为发达.因此，该虾是甲壳动物中调节能力较强的“渗透压调节者”.
ZHOUShuang-lin(周双林) +1 more
doaj +1 more source
Yttrium Addition Co‐Enhances the Plasticity and Corrosion Resistance of TiB2‐Refined Al‐Mg‐Zn Alloys
Rare Metals, Volume 45, Issue 1, January 2026.ABSTRACT To address the degradation of corrosion resistance induced by Al‐5Ti‐B grain refiner during the strengthening of Al‐Mg‐Zn alloys, this study innovatively employed a rare earth element yttrium (Y) alloying strategy to achieve synergistic enhancement of mechanical strength and corrosion resistance.
Wen‐Tao Qin +9 more
wiley +1 more source
Dianci bileiqi, 2013 列举了等静压成型电瓷坯料干坯孔隙率的几种影响因素,坯料颗粒组成、坯料颗粒级配、压力制度、粉料水分,通过控制原料细度、球磨工艺、新旧料配比来改变颗粒组成,控制喷雾工艺来优化颗粒级配与粉料水份,同时压坯之前,增加振动使粉料进一步致密,从而降低坯料干坯孔隙率。
刘宏烈, 沈骏, 李红宝
doaj
Study on oil-bearing sludge profile control agent and its ability evaluation(污油泥调剖剂的研究与性能评价)
Zhejiang Daxue xuebao. Lixue ban, 2005 通过分析油田产出含油污泥组分和粒径，确定以含油污泥为主要原材料，添加适当化学药剂和固相颗粒得到一种新型含油污泥调剖剂.合理配方（质量分数）为：污油泥50% +悬浮剂0.2% ~0.3% +乳化剂0.3% ~0.4% +膨润土 8% +水，固含量大于15.65%，调剖剂体系稳定，不产生分层现象.岩心实验表明，当孔喉与颗粒粒径之比在9.0~12.0时，调剖剂可以顺利进入岩心，实现稳态注入，当固相颗粒加入量大于8% 时，岩心封堵率可达94%.该技术有助于解决含油污泥外排造成的环境污染问题，为油田综合治理 ...
FANZhen-zhong(范振中) +1 more
doaj +1 more source
Rare Metals, Volume 45, Issue 1, January 2026.ABSTRACT Although magnetic carbon materials possess significant potential in the field of electromagnetic wave absorption (EWA) due to the synergistic effect of multiple attenuation mechanisms, the currently reported magnetic carbon EWA materials face some challenges, such as high cost, low yield, and easy agglomeration of the magnetic component ...
Bo Jiang +9 more
wiley +1 more source
Shuitu Baochi Xuebao, 2017 研究不同耕作年限新疆玛纳斯县耕地的土壤颗粒组成、不同土壤颗粒有机碳含量变化特征以及二者的相关关系。选取4个不同耕作年限耕地为研究对象，采集土层0—300 cm的土壤样品，采用激光法获取土壤颗粒组成，探讨长期耕作对土壤颗粒组成以及不同土壤颗粒有机碳含量的影响。结果表明：研究区域土壤颗粒组成主要以砂粒（约占21.0%～35.4%）和粉粒（约占46.0%～50.0%）为主，砂粒含量下部明显高于上部，而粉粒含量中部明显低于上部和下部；随着耕作年限增加，上部耕层（0—60 cm）土壤质地由粉砂质粘壤土转变为壤土 ...
颜, 李周晶, 武红旗, 温鹏飞
doaj
Characteristics of Soil Saturated Hydraulic Conductivity and Its Influencing Factors at Different Landscape Positions in a Small Peak-Cluster Depression Watershed of the Karst Region [PDF]
[Objective] Peak-cluster depression is one of the important karst landform types. Exploring the influence of different landscape positions on soil saturated hydraulic conductivity (Ks) can provide a reference for further understanding of the hydrological
HOU Senzheng +5 more
core +1 more source