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3298篇 您的检索式:作者名="MARTENS"
    题名 作者 年代 出处 被引量
1长江南京段水、悬浮物及沉积物中多氯有毒有机污染物显示文摘对长江南京段水、悬浮物及沉积物中多氯有机有毒污染物进行了分析测定,由色谱/质谱测得的结果表明,水和沉积物中多氯有机污染物的浓度较低,低于欧洲主要河流中的含量水平,悬浮物中这类污染物总含量较高,为56.45~62.35μg/kg,而水中总含量仅为14.61~15.83ng/L,由于长江中污染物被充分稀释与混匀,各采样点的水和悬浮物中该类污染物的浓度变化不大,两相间具有较好的相关性。蒋新 许士奋 Martens D 王连生 2000中国环境科学2000,20,3:113
2固相萃取-高效液相色谱法同时测定水中的16种苯脲除草剂(英文)显示文摘建立了固相萃取 高效液相色谱 (SPE HPLC)同时测定水中 16种苯脲除草剂的方法。HPLC采用Lichrospher 10 0RP 18e柱 ,紫外检测波长为 2 40nm ,流动相为乙腈水溶液 ,流速为 1mL/min ,采用梯度洗脱方式。HPLC分析时间少于 2 0min。水中的除草剂用C18柱固相萃取富集 10 0 0倍。在优化的条件下 ,各成分的添加回收率为 87 8%~ 10 3 7%。此方法的检测限低于欧盟允许的水中除草剂含量上限的 1/李方实 Dieter MARTENS Antonius KETTRUP 2001色谱2001,19,6:26
3A survey on artificial intelligence trends in spacecraft guidance dynamics and control显示文摘The rapid developments of artificial intelligence in the last decade are influencing aerospace engineering to a great extent and research in this context is proliferating.We share our observations on the recent developments in the area of spacecraft guidance dynamics and control,giving selected examples on success stories that have been motivated by mission designs.Our focus is on evolutionary optimisation,tree searches and machine learning,including deep learning and reinforcement learning as the key technologies and drivers for current and future research in the field.From a high-level perspective,we survey various scenarios for which these approaches have been successfully applied or are under strong scientific investigation.Whenever possible,we highlight the relations and synergies that can be obtained by combining different techniques and projects towards future domains for which newly emerging artificial intelligence techniques are expected to become game changers.Dario Izzo Marcus Martens Binfeng Pan 2019Astrodynamics2019,3,4:15
4Evaluation of hepatic cystic lesions显示文摘Hepatic cysts are increasingly found as a mere coincidence on abdominal imaging techniques, such as ultrasonography (USG), computed tomography (CT) and magnetic resonance imaging (MRI). These cysts often present a diagnostic challenge. Therefore, we performed a review of the recent literature and developed an evidence-based diagnostic algorithm to guide clinicians in characterising these lesions. Simple cysts are the most common cystic liver disease, and diagnosis is based on typical USG characteristics. Serodiagnostic tests and microbubble contrast-enhanced ultrasound (CEUS) are invaluable in differentiating complicated cysts, echinococcosis and cystadenoma/cystadenocarcinoma when USG, CT and MRI show ambiguous findings. Therefore, serodiagnostic tests and CEUS reduce the need for invasive procedures. Polycystic liver disease (PLD) is arbitrarily defined as the presence of > 20 liver cysts and can present as two distinct genetic disorders: autosomal dominant polycystic kidney disease (ADPKD) and autosomal dominant polycystic liver disease (PCLD). Although genetic testing for ADPKD and PCLD is possible, it is rarely performed because it does not affect the therapeutic management of PLD. USG screening of the liver and both kidneys combined with extensive family history taking are the cornerstone of diagnostic decision making in PLD. In conclusion, an amalgamation of these recent advances results in a diagnostic algorithm that facilitates evidence-based clinical decision making.Marten A Lantinga Tom JG Gevers Joost PH Drenth 2013World Journal of Gastroenterology2013,19,23:12
5Microporous bamboo biochar for lithium-sulfur batteries显示文摘简单、便宜、可伸缩、环境地友好,多微孔的生物资源 biochars 在锂硫(Li-S ) 为申请一直在吸引热心注意电池。此处,多孔的竹子 biochar 经由创造多微孔的结构的一个 KOH/annealing 过程被激活,增加表面区域并且提高电子电导率。对待的样品被用来包含硫准备多微孔的竹子碳硫(英国计算机学会) 用作为 Li-S 电池的阴极的 nanocomposite 第一次。有 50 wt.% 硫内容的英国计算机学会 nanocomposite 交付 1,295 妈的一个高起始的能力 ???  ??Xingxing Gu Yazhou Wang Chao Lai Jingxia Qiu Sheng Li Yanglong Hou Wayde Martens Nasir Mahmood Shanqing Zhang 2015Nano Research2015,8,1:11
6云南柳莺鸣声特点及地理差异的初步分析显示文摘1997、2002和2005年5~7月,在陕西省、四川省和甘肃省内共7个地区采集云南柳莺(Phylloscopus yunnanensis)的鸣声样本,并分析采自不同地区的共40只个体的鸣声。发现云南柳莺的鸣唱(song)和鸣叫(calls)在同一地区存在一定的差异。比较99段云南柳莺的鸣唱声,发现持续时间与间隔时间之间存在显著的负相关(Pearson,r=-0.276,P=0.006,n=99)。单因素方差分析表明,不同地区云南柳莺鸣唱的最高频率、最低频率和持续时间没有显著差异,而音节的间隔时间及音素数量均存在显著差异(P=0.006;P=0.000)。结果表明,不同海拔、地区之间个体鸣唱音节间隔时间与海拔成正相关(Pearson,r=0.425,P=0.03,n=26)。李金林 孙悦华 Jochen MARTENS 毕中霖 2008动物学杂志2008,43,3:10
7TPC1 - SV Channels Gain Shape显示文摘Rainer Hedrich Irene Marten 2011Molecular Plant2011,4,3:8
8固相流体热萃取-GC/MS分析土壤中氯苯类有机污染物显示文摘选用不同配比的正己烷与丙酮混合液、乙腈作为提取溶剂,应用固相流体热萃取仪对土壤中的氯苯类有机物进行提取分离,用气相色谱 质谱进行测定。结果表明:仪器工作条件为提取温度120℃,冷却温度为30℃时,正己烷与丙酮混合提取效果明显优于乙腈。方法线性关系良好,相关系数高于0.99,回收率大于80%,相对标准偏差小于5%,氯苯类物质检测限为2ng/g。郎印海 蒋新 Martens D 卞永荣 2003分析试验室2003,22,6:8
9Silicon and silicon nitride photonic circuits for spectroscopic sensing on-a-chip [Invited]显示文摘There is a rapidly growing demand to use silicon and silicon nitride(Si3N4) integrated photonics for sensing applications, ranging from refractive index to spectroscopic sensing. By making use of advanced CMOS technology,complex miniaturized circuits can be easily realized on a large scale and at a low cost covering visible to mid-IR wavelengths. In this paper we present our recent work on the development of silicon and Si3N4-based photonic integrated circuits for various spectroscopic sensing applications. We report our findings on waveguide-based absorption, and Raman and surface enhanced Raman spectroscopy. Finally we report on-chip spectrometers and on-chip broadband light sources covering very near-IR to mid-IR wavelengths to realize fully integrated spectroscopic systems on a chip.Ananth Z.Subramanian Eva Ryckeboer Ashim Dhakal Frédéric Peyskens Aditya Malik Bart Kuyken Haolan Zhao Shibnath Pathak Alfonso Ruocco Andreas De Groote Pieter Wuytens Daan Martens Francois Leo Weiqiang Xie Utsav Deepak Dave Muhammad Muneeb Pol Van Dorpe Joris Van Campenhout Wim Bogaerts Peter Bienstman Nicolas Le Thomas Dries Van Thourhout Zeger Hens Gunther Roelkens Roel Baets 2015Photonics Research2015,3,5:7
10Sensory innervation around immediately vs. delayed loaded implants: a pilot study显示文摘Although neurophysiological and psychophysical proof of osseoperception is accumulating, histomorphometric evidence for the neural mechanisms of functional compensation following immediate and delayed implant loading is still lacking. For this randomized split-mouth study, six mongrel dogs randomly received one of four treatment protocols at 36 implant-recipient sites over 16 weeks(third maxillary incisor, third and fourth mandibular premolar): immediate implant placement and immediate loading(IIP1IL);delayed implant placement and delayed loading(DIP1DL); delayed implant placement and immediate loading(DIP1IL); and natural extraction socket healing(control). Histomorphometry was performed in the peri-implant bone and soft tissues within 300 mm around the implants. Immunocytochemistry and transmission electron microscopy were used to confirm the presence of neural structures and to reveal their ultrastructural characteristics, respectively. Myelinated nerve fibres densely populated the peri-implant crestal gingival and apical regions, although they were also identified in the woven bone and in the osteons near the implant threads. Compared with the control group in the mandible, the group that received IIP1 IL showed a higher innervation(in Nmm22, 5.9461.12 vs. 3.1560.63,P,0.001) and smaller fibre diameter(in mm, 1.3760.05 vs. 1.6460.13, P50.016), smaller axon diameter(in mm, 0.8960.05 vs.1.2460.10, P50.009) and g-ratio(0.6460.04 vs. 0.7660.05, P,0.001) in the middle region around the implants. Compared with DIP1 IL in the mandible, IIP1 IL had a higher nerve density(in Nmm22, 13.2362.54 vs. 9.6461.86, P50.027), greater fibre diameter(in mm, 1.3260.02 vs. 1.2060.04, P50.021), greater axon diameter(in mm, 0.9260.01 vs. 0.8960.03, P50.035) and lower g-ratio(0.6960.01 vs. 0.7460.01, P50.033) in the apical region around the implants. It may be assumed that the treatment protocol with IIP1 IL is the preferred method to allow optimized peri-implant re-innervation, but further functional measurements are still required.Yan Huang Jeroen van Dessel Wendy Martens Ivo Lambrichts Wei-Jian Zhong Guo-Wu Ma Dan Lin Xin Liang Reinhilde Jacobs 2015International Journal of Oral Science2015,7,1:7
11Performance of Transient Elastography for the Staging of Liver Fibrosis: A Meta-Analysis显示文摘Mireen Friedrich–Rust Mei–Fang Ong Swantje Martens Christoph Sarrazin Joerg Bojunga Stefan Zeuzem Eva Herrmann 2008Gastroenterology2008,,4:6
12Clinical features and treatment outcomes of endogenous Klebsiella endophthalmitis:a 12-year review显示文摘AIM:To identify the clinical features and treatment outcomes of endogenous Klebsiella pneumoniae endophthalmitis and investigate prognostic factors of poor visual outcome.METHODS:The clinical records of all patients diagnosed with endogenous Klebsiella endophthalmitis between January 2007 to December 2018 in Prince of Wales Hospital,Hong Kong,China were retrospectively reviewed.Thorough ophthalmological examination findings were recorded in the case note,including visual acuity testing,slit-lamp examination,indirect ophthalmoscopy and B-scan ultrasonography if media opacity precluded fundus viewing.RESULTS:A total of 18 eyes in 14 patients were identified.Bilateral involvement was noted in 4 patients(28.6%).Hepatobiliary sepsis was the source in 9 patients(64.3%).Culture of intraocular fluid was positive in 5 out of 18 eyes(27.8%).Mortality was noted in 2 patients(14.3%).Mean final visual acuity was 20/1500.Six out of 16 eyes had total loss of sight(37.5%)and 3 eyes required evisceration(18.8%).Multivariate linear regression revealed poor presenting visual acuity(P=0.031)and lack of fundus view due to vitritis(P=0.02)as prognostic factors of poor visual outcome.CONCLUSION:Visual outcome of endogenous Klebsiella endophthalmitis is poor.Poor presenting visual acuity and lack of fundus view predict poor visual outcome.High index of suspicion for endophthalmitis is important in Klebsiella sepsis patients with complaints of ocular symptoms.Ophthalmological screening is recommended in noncommunicable patients with Klebsiella sepsis.Chun Yue Mak Mary Ho Lawrence Pui-leung Iu Helena Pui-yee Sin Li Jia Chen Grace Lui Marten Erik Brelen Alvin Lerrmann Young 2020International Journal of Ophthalmology(English edition)2020,13,12:5
13棕眉柳莺鸣唱声谱分析及其地理差异的初步研究显示文摘2002、2005、2007年5~8月,在甘肃莲花山、宁夏贺兰山和内蒙阿拉善贺兰山等自然保护区对棕眉柳莺(Phylloscopus armandii)的鸣唱进行了采集,共录到18只108min的鸣声。通过声谱分析,棕眉柳莺鸣唱的频率范围在2.63~6.32kHz之间;音素数平均为5.56±2.47(n=124);持续时间为(1.07±0.30)s(n=124),最长可达2.68s。棕眉柳莺鸣唱音节之间的间隔时间差异较大,范围在2~18s之间;从18只个体共589个音节中总结出61种音节类型,其中37种为共享音节,24种为特有音节,分别占总数的60.7%和39.3%。不同棕眉柳莺个体的鸣唱音节类型组成不同,没有任何两只棕眉柳莺个体的音节曲目完全一致。莲花山和内蒙贺兰山两个地区内个体之间的音节相似性系数存在显著差异(P=0.001)。通过对棕眉柳莺鸣唱的地理变异分析,发现越是邻近分布的个体其鸣唱也越相似。李金林 吕楠 MARTENS Jochen 孙悦华 2009动物学杂志2009,44,1:5
14Charnockite microstructures:From magmatic to metamorphic显示文摘Charnockites sensu lato (charnockite-enderbite 系列) 是无水的矿物质的存在典型地包括 orthopyroxene 和石榴石描述的更低的外壳的 felsic 岩石。他们也代表干燥(H2O 差) 是在在随后的 granulite 外形期间被使脱水了的更低的外壳或花岗石的侵入中的 emplaced 的 felsic 岩浆变形事件。在第一个案例中, post-magmatic 高温度的 recrystallisation 可以导致普遍变形 granulite 微观结构,附加或代替 magmatic 微观结构。尽管有 recrystallisation, magmatic 残余可以仍然被发现,尤其是在融化相关的微观结构例如形式融化包括。为 magmatic charnockites 和使脱水的花岗石,在 intergrain 边界的随后的液体矿物质相互作用被微观结构包括 K 长石 microveins 和 myrmekites 在逆行期间记录。他们显示那 low-H2O 活动的大数量充满盐的盐水,是在场的(和在不能混合的条件下面的 CO2 ) 在更低的外壳中。Jacques L.R.Touret Jan Marten Huizenga 2012Geoscience Frontiers2012,3,6:4
15大堡礁和大峡谷世界遗产区的适应性管理显示文摘关于人类和环境相互关系的传统观念正在迅速改变。那种认为人类与自然是相互隔离的,自然资源是取之不尽用之不竭的,而且认为世界是稳定的、可以预测的并且是平衡的旧观点已经过时了。在动态的社会-生态景观中强调学习和灵活性管理为基础的适应性方法的新的理念框架已经迅速初现端倪。我们以两个典型的世界遗产地区(大堡礁和大峡谷)为案例来研究如何在自然资源管理中通过改善科学和社会两个方面的结合来指导多尺度管理系统的变革从而应对和处理人类越来越占据主导的世界中出现的不确定性、风险和变化。Terence P.Hughes Lance H.Gunderson Carl Folke Andrew H.Baird David Bellwood Fikret Berkes Beatrice Crona Ariella Helfgott Heather Leslie Jon Norberg Magnus Nystrm Per Olsson Henrik sterblom Marten Scheffer Heidi Schuttenberg Robert S.Steneck Maria Teng Max Troell Brian Walker James Wilson Boris Worm 丁莉 2007AMBIO-人类环境杂志2007,36,B11:4
16陕西秦岭发现四川旋木雀显示文摘孙悦华 Jochen Martens 2005动物学杂志2005,40,4:4
17Gelatin degradation assay reveals MMP-9 inhibitors and function of O-glycosylated domain显示文摘AIM: To establish a novel, sensitive and high-throughput gelatinolytic assay to define new inhibitors and compare domain deletion mutants of gelatinase B/matrix metalloproteinase (MMP)-9. METHODS: Fluorogenic Dye-quenched (DQ)TM-gelatin was used as a substrate and biochemical parameters (substrate and enzyme concentrations, DMSO solvent concentrations) were optimized to establish a highthroughput assay system. Various small-sized libraries (ChemDiv, InterBioScreen and ChemBridge) of hetero-cyclic, drug-like substances were tested and compared with prototypic inhibitors. RESULTS: First, we designed a test system with gelatin as a natural substrate. Second, the assay was validated by selecting a novel pyrimidine-2,4,6-trione (barbitu- rate) inhibitor. Third, and in line with present structural data on collagenolysis, it was found that deletion of the O-glycosylated region significantly decreased gelatinolytic activity (kcat/kM ± 40% less than full-length MMP-9). CONCLUSION: The DQTM-gelatin assay is useful in high-throughput drug screening and exosite targeting. We demonstrate that flexibility between the catalytic and hemopexin domain is functionally critical for gelatinolysis.Jennifer Vandooren Nathalie Geurts Erik Martens Philippe E Van den Steen Steven De Jonghe Piet Herdewijn Ghislain Opdenakker 2011World Journal of Biological Chemistry2011,2,1:3
18Prevention of overuse: A view on upper gastrointestinal endoscopy显示文摘Many upper gastrointestinal(GI) endoscopies worldwide are performed for inappropriate indications. This overuse of healthcare negatively affects healthcare quality and puts pressure on endoscopy services. Dyspepsia is one of the most common inappropriate indications for upper GI endoscopy as diagnostic yield is low. Reasons for untimely referral are: unfamiliarity with dyspepsia guidelines,uncertainty about etiology of symptoms, and therapy failure. Unfiltered openaccess referrals feed upper GI endoscopy overuse. This review highlights strategies applied to diminish use of upper GI endoscopies for dyspepsia. First,we describe the impact of active guideline implementation. We found improved guideline adherence, but resistance was encountered in the process. Secondly, we show several forms of clinical assessment. While algorithm use reduced upper GI endoscopy volume, effects of referral assessment of individual patients were minor. A third strategy proposed Helicobacter pylori test and treat for all dyspeptic patients. Many upper GI endoscopies can be avoided using this strategy, but outcomes may be prevalence dependent. Lastly, empirical treatment with Proton pump inhibitors achieved symptom relief for dyspepsia and avoided upper GI endoscopies in about two thirds of patients. Changing referral behavior is complex as contributing factors are manifold. A collaboration of multiple strategies is most likely to succeed.Judith J de Jong Marten A Lantinga Joost PH Drenth 2019World Journal of Gastroenterology2019,25,2:3
19Rice Drying,Storage and Processing:Effects of Post-Harvest Operations on Grain Quality显示文摘Various post-harvest processes of rice are commonly employed,especially during the off-season,to ensure its consumption feasibility,which often affect the grain quality.Different forms of drying,storage and processing of rice are evaluated to identify their effects on grain quality.Microwave drying has emerged as an alternative to the widely-used intermittent-drying and fixed-bed-dryer methods of drying paddy rice.Control of drying-air temperatures(between 40℃ and 60℃)according to the rice variety can improve quality,especially for exotic varieties.Keeping stored grain in hygroscopic balance,with water content between 11%to 15%,at temperatures between 16℃ and 20℃ and with intergranular relative humidity near 60%,allows 12 months of storage in a controlled environment without significant deterioration.Other innovations,notably the application of artificial refrigeration to grain stored in bulk in vertical cylindrical silos and the use of impermeable packaging for storage,ensure the conservation of grain mass.The different stages and equipments used to obtain polished,brown and parboiled rice result in significant changes in the nutritional value of rice because of the removal of the outermost layers of the grains.Polishing reduces the nutritional value and physical homogeneity of rice.Brown rice retains more bioactive compounds and nutrients because it does not lose the outer layer of the grains in the polishing processes.Parboiled rice,although less nutritious than brown rice,has better grain integrity and milling yield and less loss of nutrients than white rice.Amanda MÜLLER Marcela Trojahn NUNES Vanessa MALDANER Paulo Carteri CORADI Rosana Santos de MORAES Samuel MARTENS Andressa Fernandes LEAL Vladison Fogliato PEREIRA Cristielle König MARIN 2022Rice science2022,29,1:3
20Decoding altitude-activated regulatory mechanisms occurring during apple peel ripening显示文摘Apple(Malus domestica Borkh)is an important fruit crop cultivated in a broad range of environmental conditions.Apple fruit ripening is a physiological process,whose molecular regulatory network response to different environments is still not sufficiently investigated and this is particularly true of the peel tissue.In this study,the influence of environmental conditions associated with low(20 m)and high(750 m)altitude on peel tissue ripening was assessed by physiological measurements combined with metabolomic and proteomic analyses during apple fruit development and ripening.Although apple fruit ripening was itself not affected by the different environmental conditions,several key color parameters,such as redness and color index,were notably induced by high altitude.Consistent with this observation,increased levels of anthocyanin and other phenolic compounds,including cyanidin-3-O-galactoside,quercetin-3-O-rhamnoside,quercetin-3-O-rutinoside,and chlorogenic acid were identified in the peel of apple grown at high altitude.Moreover,the high-altitude environment was characterized by elevated abundance of various carbohydrates(e.g.,arabinose,xylose,and sucrose)but decreased levels of glutamic acid and several related proteins,such as glycine hydroxymethyltransferase and glutamate–glyoxylate aminotransferase.Other processes affected by high altitude were the TCA cycle,the synthesis of oxidative/defense enzymes,and the accumulation of photosynthetic proteins.From the obtained data we were able to construct a metabolite-protein network depicting the impact of altitude on peel ripening.The combined analyses presented here provide new insights into physiological processes linking apple peel ripening with the prevailing environmental conditions.Evangelos Karagiannis Michail Michailidis Georgia Tanou Federico Scossa Eirini Sarrou George Stamatakis Martina Samiotaki Stefan Martens Alisdair R.Fernie Athanassios Molassiotis 2020Horticulture Research2020,7,1:3
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