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81.
Viljo P. HirsjÄrvi Elsa KenttÄmaa Marjatta Suurinkeroinen Berit Aimonen und Rita Martti 《Fresenius' Journal of Analytical Chemistry》1959,171(5):354-359
Zusammenfassung Bei der Durchführung der Fluorbestimmung unter Verwendung der von den Verff. modifizierten Methode von Willard-Winter verursachen die bei den Versuchen angewandten Mengen an Sulfaten, Chloriden oder Orthophosphaten keine Fehler bei der Bestimmung von Milligrammengen an Fluor. Auch der Einflu\ von Boraten, Jodiden und Carbonaten ist so gering, da\ ihnen wenigstens bei den Serienanalysen von Mineralfuttermitteln und Rohphosphaten in den Laboratorien keine Bedeutung zukommt. Demnach braucht man bei den genannten Analysen vor der Destillation keine besonderen Ma\nahmen zu ergreifen, es sei denn, da\ man die Jodide durch Silberperchlorat binden will. Um den geringen Einflu\ der Borate vollstÄndig zu eliminieren, ist es zweckmÄ\ig, die Destillationsdauer etwas zu verlÄngern. 相似文献
82.
The synthesis of novel 4-(phenylethynyl)pyridine subunits containing H2O-soluble complexing agents and their luminescence with EuIII ions are reported. Ligands with high luminescence intensities as well as quantum yields were obtained. Also the prepared labeling reagents as antibody conjugates gave the highest quantum and luminescence yields reported for H2O-soluble EuIII labels. 相似文献
83.
Gerhard Jany Timo Repo Marina Gustafsson Martti Klinga Adnan S. Abu‐Surrah Markku Leskel 《无机化学与普通化学杂志》2000,626(9):1897-1900
The synthesis and characterization of the unsymmetric hafnium dialkyl [1‐(η5‐9‐fluorenyl)‐2‐(η5‐1‐indenyl)ethane]HfCl2 ( 2 ) and corresponding dimethyl complex [1‐(η5‐9‐fluorenyl)‐2‐(η5‐1‐indenyl)ethane]Hf(CH3)2 ( 3 ) is described. The dialkyl hafnocene ( 3 ) crystallizes in monoclinic space group P21/c (No. 14) with a = 9.458(8), b = 8.541(8), c = 23.733(11) Å, β = 93.16(5) deg., V = 1914(3) Å3, Z = 4. Further on, complex 3 was activated with methylaluminiumoxane (MAO) and utilized as a catalyst in ethene polymerization. 相似文献
84.
Amir Asadpoordarvish Andreas Sandström Christian Larsen Roger Bollström Martti Toivakka Ronald Österbacka Ludvig Edman 《Advanced functional materials》2015,25(21):3238-3245
A solution‐based fabrication of flexible and light‐weight light‐emitting devices on paper substrates is reported. Two different types of paper substrates are coated with a surface‐emitting light‐emitting electrochemical cell (LEC) device: a multilayer‐coated specialty paper with an intermediate surface roughness of 0.4 μm and a low‐end and low‐cost copy paper with a large surface roughness of 5 μm. The entire device fabrication is executed using a handheld airbrush, and it is notable that all of the constituent layers are deposited from solution under ambient air. The top‐emitting paper‐LECs are highly flexible, and display a uniform light emission with a luminance of 200 cd m?2 at a current conversion efficacy of 1.4 cd A?1. 相似文献
85.
86.
Vinay Kumar Venkata Rajesh Koppolu Douglas Bousfield Martti Toivakka 《Cellulose (London, England)》2017,24(3):1247-1260
Interest in nanocellulose-based coatings for packaging applications has been growing due to their excellent oil and gas barrier properties combined with their sustainable, recyclable, biodegradable, and non-toxic nature. Coating of nanocellulose materials such as microfibrillated cellulose (MFC) on paper/paperboard is challenging compared to traditional paper coating materials due to excessively high viscosity and yield stress of MFC suspensions at rather low solids content, typically below 5%. Possessing large amounts of water and a distinct rheological behavior such suspensions set tough demands on the substrate to be coated. It is important to understand and quantify substrate requirements in order to coat these suspensions successfully and achieve a satisfactory coating quality. A custom-built slot geometry is used herein to enable coating of highly viscous MFC suspensions on different paper-based substrates in a roll-to-roll process. The impact of substrate properties, such as surface chemistry and surface energy, surface roughness and surface porosity, and water absorption capacity on MFC coatability and coating quality is reported. Coating adhesion to the substrate was quantified with surface strength testing of MFC coated substrates. Various techniques, such as Scanning Electron Microscopy, IGT print penetration tests, and air permeability tests were employed for measuring coating coverage and surface porosity. MFC coating was found to adhere best to a highly hydrophilic surface, whereas the most uniform and defect-free film at low coat weights was formed on a smooth surface. It was also found that the MFC coat weight needed for full coverage, and therefore potentially good barrier, needs to exceed the surface roughness volume of the substrate. Water absorption capacity of the substrate also determines the final MFC coating quality obtained. The results clearly highlight the role of paper-based substrate for successful and effective coating of the micro and nanocellulose suspension. 相似文献
87.
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89.
Pekka Miettinen Mikko Honkala Janne Roos Martti Valtonen 《Journal of Electronic Testing》2014,30(3):271-285
Model-order reduction (MOR) is a typical approach to speed up the post-layout verification simulation step in circuit design. This paper studies the benefits of using circuit partitioning in a complete MOR flow. First, an efficient reduction algorithm package comprising of partitioning, reduction, and realization parts is presented. The reduction flow is then discussed using theoretical analysis and simulations from an array of 65-nm technology node interconnect circuits. It is shown that the reduction efficiency and computational costs quickly worsen with increased circuit size when using a direct projection-based MOR approach. In contrast, by using partitioning, the MOR can retain the scalability of the reduction problem, being computationally lighter and more efficient even with larger circuits. In addition, using partitioning may improve the robustness of the MOR flow in cases with circuits with many ports or sensitive verification simulations. 相似文献
90.
Yuanzhi Zhang Jouni Pulliainen Sampsa Koponen Martti Hallikainen 《Journal of Infrared, Millimeter and Terahertz Waves》2002,23(10):1407-1412
This paper presents the detection of sea surface temperature (SST) in the Gulf of Finland using infrared band data of Advanced Very High Resolution Radiometer (AVHRR). AVHRR imagery is evaluated as a main data source for monitoring SST as a measure of upwelling's dynamic. Sea surface effects (SSE), however, cause a temperature difference between the sea surface skin and water below the surface. Therefore, SSE is taken into account as one of the major error factors in the SST esimation. Further studies will be investigated using both AVHRR and MODIS in the future. 相似文献