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Selective and self-validating breath-level detection of hydrogen sulfide in humid air by gold nanoparticle-functionalized nanotube arrays

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Nano Research 2022年第3期15卷 2512-2521页

作者： Luis Antonio Panes-Ruiz Leif Riemenschneider Mohamad Moner Al Chawa Markus Löffler Bernd Rellinghaus ronald tetzlaff Viktor Bezugly Bergoi Ibarlucea Gianaurelio Cuniberti Institute for Materials Science Max Bergmann Center of BiomaterialsTechnische Universität DresdenDresden 01062Germany Institute of Circuits and Systems Technische Universität DresdenDresden 01062Germany Dresden Center for Nanoanalysis(DCN) Center for Advancing Electronics Dresden(cfaed)Technische Universität DresdenDresden 01062Germany Life Science Incubator Sachsen GmbH&Co.KG Dresden 01307Germany Center for Advancing Electronics Dresden(cfaed) Technische Universität DresdenDresden 01062Germany

We demonstrate the selective detection of hydrogen sulfide at breath concentration levels under humid airflow,using a self-validating 64-channel sensor array based on semiconducting single-walled carbon nanotubes(sc-SWCNTs).The reproducible sensor fabrication process is based on a multiplexed and controlled dielectrophoretic deposition of *** sensing area is functionalized with gold nanoparticles to address the detection at room temperature by exploiting the affinity between gold and sulfur atoms of the *** devices functionalized with an optimized distribution of nanoparticles show a sensitivity of 0.122%/part per billion(ppb)and a calculated limit of detection(LOD)of 3 *** the self-validation,our sensors show increased stability and higher response levels compared to some commercially available electrochemical *** cross-sensitivity to breath gases NH3 and NO is addressed demonstrating the high selectivity to ***,mathematical models of sensors’electrical characteristics and sensing responses are developed to enhance the differentiation capabilities of the platform to be used in breath analysis applications.

关键词： chemiresistive gas sensors semiconducting carbon nanotubes gold nanoparticles hydrogen sulfide detection chemiresistor mathematical model

Forecasting the effects of EU policy measures on the nitrate pollution of groundwater and surface waters

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Journal of Environmental Sciences 2010年第6期22卷 872-877页

作者： Ralf Kunkel Peter Kreins Bjrn tetzlaff Frank Wendland Research Centre Jülich Institute of Chemistry and Dynamics of the Geosphere Institute of Rural Studies Federal Agricultural Research Centre

We used the interdisciplinary model network REGFLUD to predict the actual mean nitrate concentration in percolation water at the scale of the Weser river basin （Germany） using an area differentiated （100 m × 100 m） approach. REGFLUD combines the agro-economic model RAUMIS for estimating nitrogen surpluses and the hydrological models GROWA/DENUZ for assessing the nitrate leaching from the soil. For areas showing predicted nitrate concentrations in percolation water above the European Union （EU） groundwater quality standard of 50 mg NO3-N/L, effective agri-environmental reduction measures need to be derived and implemented to improve groundwater and surface water quality by 2015. The effects of already implemented agricultural policy are quantified by a baseline scenario projecting the N-surpluses from agricultural sector to 2015. The REGFLUD model is used to estimate the effects of this scenario concerning groundwater and surface water pollution by nitrate. From the results of the model analysis the needs for additional measures can be derived in terms of required additional N-surplus reduction and in terms of regional prioritization of measures. Research work will therefore directly support the implementation of the Water Framework Directive of the European Union in the Weser basin.

关键词： catchment management diffuse source pollution mitigation methods river basin management Water Framework Directive

Neuroprotective effects of a ketogenic diet in combination with exogenous ketone salts following acute spinal cord injury

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Neural Regeneration Research 2020年第10期15卷 1912-1919页

作者： Bo-Tao Tan Hui Jiang Aaron JMoulson Xiao-Liang Wu Wen-Chun Wang Jie Liu Ward TPlunet Wolfram tetzlaff Department of Rehabilitation Medicine The Second Affiliated Hospital of Chongqing Medical UniversityChongqingChina International Collaboration on Repair Discoveries(ICORD) Blusson Spinal Cord CenterVancouverBritish ColumbiaCanada Department of Zoology University of British ColumbiaVancouverBritish ColumbiaCanada Department of Spinal Surgery Nanfang HospitalSouthern Medical UniversityGuangzhouGuangdong ProvinceChina Department of Rehabilitation Medicine The General Hospital of Western Theater Command PLAChengduSichuan ProvinceChina

We have previously shown that induction of ketosis by ketogenic diet(KD)conveyed neuroprotection following spinal cord injury in rodent models,however,clinical translation may be limited by the slow raise of ketone levels when applying KD in the acute post-injury *** we investigated the use of exogenous ketone supplementation(ketone sodium,KS)combined with ketogenic diet as a means rapidly inducing a metabolic state of ketosis following spinal cord injury in adult *** uninjured rats,ketone levels increased more rapidly than those in rats with KD alone and peaked at higher levels than we previously demonstrated for the KD in models of spinal cord ***,ketone levels in KD+KS treated rats with SCI did not exceed the previously observed levels in rats treated with KD *** still demonstrated neuroprotective effects of KD+KS treatment that extend our previous neuroprotective observations with KD *** results showed increased neuronal and axonal sparing in the dorsal corticospinal ***,better performance of forelimb motor abilities were observed on the Montoya staircase(for testing food pellets reaching)at 4 and 6 weeks post-injury and rearing in a cylinder(for testing forelimb usage)at 6 and 8 weeks *** together,the findings of this study add to the growing body of work demonstrating the potential benefits of inducing ketosis following *** salt combined with a ketogenic diet gavage in rats with acute spinal cord injury can rapidly increase ketone body levels in the blood and promote motor function *** study was approved by the Animal Care Committee of the University of British Columbia(protocol No.A14-350)on August 31,2015.

关键词： axon behavior corticospinal tract ketogenic diet ketone supplementation myelin neuroprotection spinal cord injury

Fe/Co and Ni/Co-pentlandite type electrocatalysts for the hydrogen evolution reaction

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Chinese Journal of Catalysis 2021年第8期42卷 1360-1369页

作者： Mathias Smialkowski David tetzlaff Lars Hensgen Daniel Siegmund Ulf-Peter Apfel Inorganic Chemistry I-Ruhr University Bochum Universitätsstrasse 15044801 BochumGermany Fraunhofer UMSICHT Osterfelder Strasse 346047 OberhausenGermany Tribotecc GmbH Fleischmarkt 3-51010 ViennaAustria

Metal-rich transition metal sulfides recently gained increasing attention as electrocatalysts for the hydrogen evolution reaction(HER),as they are capable to overcome major challenges faced by sulfide-rich metal catalysts such as limited conductivity and the necessity of ***,we present the synthesis,characterization and electrocatalytic investigation of ternary metal-rich sulfide composites FexCo9-xS8 as well as Ni_(y)Co_(9-y)S_(8)(x=y=0-4.5),which possess pentlandite-type *** this study,we show a stepwise alteration of the binary cobalt pentlandite Co9S8 and report on the replacement of cobalt with up to 4.5 equivalents of either iron or *** altered pentlandite composites facilitate the proton reduction in acidic media at different *** furthermore show that the stoichiometric variation has a decisive influence on the electrochemical activation/deactivation behavior of the catalysts under reductive electrocatalytic ***,Co-deficient composites display an improved HER performance in contrast to Co_(9)S_(8).Notably,Ni/Co compounds generally tend to show higher catalytic activities towards HER than their respective Fe/Co compounds.

关键词： Hydrogen Pentlandite Metal sulfides Transition metals Electrocatalysis

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High density lipoprotein as a therapeutic target:Focus on its functionality

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BIOCELL 2023年第11期47卷 2361-2383页

作者： LEONARDO GÓMEZ ROSSO BELÉN DAVICO EZEQUIEL LOZANO CHIAPPE WALTER tetzlaff LAURA BOERO FERNANDO BRITES MAXIMILIANO MARTÍN School of Pharmacy and Biochemistry Laboratory of Lipids and AtherosclerosisDepartment of Clinical BiochemistryUniversity of Buenos AiresNational Scientific and Technical Research Council(CONICET)Buenos Aires1113Argentina

Cardiovascular diseases(CVDs)are the leading cause of death *** are a group of disorders of the heart and blood vessels and include coronary heart disease,cerebrovascular disease and rheumatic heart disease among other *** are multiple independent risk factors for CVD,including hypertension,age,smoking,insulin resistance,elevated low-density lipoprotein cholesterol(LDL-C)levels,and triglyceride ***-C levels have traditionally been the target for therapies aimed at reducing CVD *** density lipoprotein(HDL)constitutes the only lipoprotein fraction with atheroprotective *** HDL-targeted therapies have focused on increasing HDL-C ***,clinical trials have shown that raising HDL-C with niacin failed to achieve CVD reduction.A possible explanation for these findings is that these drugs could interfere with lipid metabolism and cause alterations in HDL structure and composition,leading to loss of *** a result,targeting HDL-C levels would be insufficient to achieve CVD risk reduction,making HDL functionality a more desirable focus for HDL-directed *** are several drugs which show the potential to improve HDL *** drugs include molecules already approved for human use,such as statins and niacin,and particularly,compounds currently undergoing development such as apolipoprotein A-I mimetics and reconstituted HDL *** therapies show promising potential to improve HDL functionality *** therapeutic strategies should incorporate HDL functionality as a main target of interest.

关键词： HDL Cholesterol efflux rHDL Apo A-I mimetics Statins Paraoxonase

含有取向纳米纤维束的神经移植物构建与神经修复应用研究

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现代纺织技术 2017年第6期25卷 1-6页

作者：尹桂波 Victor Leung Frank.K.Ko Wolfram tetzlaff 刘婕江苏工程职业技术学院纺染工程学院江苏南通226007 卑诗哥伦比亚大学材料工程系先进纤维材料实验室加拿大温哥华V6T1Z4 卑诗哥伦比亚大学医学院动物与外科学系加拿大温哥华V5Z1M9

为提高纳米纤维神经移植物的接触引导,设计了一种含有取向纳米纤维束的"芯鞘"型神经移植物,它利用静电纺高取向纳米纤维膜,两次卷绕形成"芯"和"鞘",最后通过静电纺丝喷覆而成。利用扫描电镜观察并表征了纤维及其移植物形态,测试了力学性... 详细信息

为提高纳米纤维神经移植物的接触引导,设计了一种含有取向纳米纤维束的"芯鞘"型神经移植物,它利用静电纺高取向纳米纤维膜,两次卷绕形成"芯"和"鞘",最后通过静电纺丝喷覆而成。利用扫描电镜观察并表征了纤维及其移植物形态,测试了力学性能,将此移植物用于大鼠10mm坐骨神经缺损,术后两月通过体外刺激和组织学观察了修复效果。结果表明:通过调整静电纺收集转辊转速可获得高取向聚乳酸纳米纤维,纳米纤维膜工程应力和伸长率达到(49.32±14.83)MPa和17.71%±0.06%,利用该膜构建的神经移植物缝合强力达到(1.18±0.40)N/针,能支持与保护神经再生,移植两月后,大鼠能够感知热与外力刺激,组织学观察发现,有神经纤维和血旺细胞长入神经移植物,证明了该构建技术的可行性,并有可能为神经修复提供一种新的移植材料。

关键词：聚乳酸纳米纤维静电纺丝神经修复生物性能

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太阳能热利用在欧美的衰落与在中国的崛起

太阳能 2011年第4期 21-24页

作者： Sven tetzlaff （德） SUN ＆ WIND ENERGY

纵观全球太阳能热利用行业的发展，东西方的差异性明显。不少人认为，这种差异正是西方衰落的信号。目前正值人们应对能源安全和气候变化的紧要关头，欧盟和美国政府却恢复旧的能源政策，已经或者即将终止所有可持续性发展的措施。对他... 详细信息

纵观全球太阳能热利用行业的发展，东西方的差异性明显。不少人认为，这种差异正是西方衰落的信号。目前正值人们应对能源安全和气候变化的紧要关头，欧盟和美国政府却恢复旧的能源政策，已经或者即将终止所有可持续性发展的措施。对他们来说能源安全意味采取古老的军事手段来挖掘接近枯竭的能源。这种行为无异于一个有50％治愈希望的病人采取的自杀行为。

关键词：太阳能热利用衰落中国欧美能源安全可持续性发展自杀行为气候变化

ITMA87:非传统纺纱方法的新进展与生产数据收集系统的全面采用

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国外纺织技术(纺织分册) 1988年第8期 9-13页

作者： G tetzlaff 陈克彰

巴黎国际纺织机械展览会(ITMA 87)的主要进展是机器性能的改善和在保证成品高质量前提下提高经济性和机器的可靠性。显然,在非传统纺纱方法方面的进展很小,其趋势仍然是83年米兰展览会上出现的方向。巴黎ITMA的特征是生产过程的大规模... 详细信息

巴黎国际纺织机械展览会(ITMA 87)的主要进展是机器性能的改善和在保证成品高质量前提下提高经济性和机器的可靠性。显然,在非传统纺纱方法方面的进展很小,其趋势仍然是83年米兰展览会上出现的方向。巴黎ITMA的特征是生产过程的大规模自动化,特别是机器之间半成品和成品的传递。最明显的是机器或中央计算机系统中的生产数据收集系统的全面采用。通过采用测

关键词：纺纱方法数据收集系统机器纱疵疵点纺纱器纺杯纺纱机械摩擦纺纱机断头率纱线质量

Protective effect of ketogenic diet on neuropathology and behavior after repetitive mild traumatic brain injury using CHIMERA in juvenile mice

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Protective effect of ketogenic diet on neuropathology and be...