The versatility of the Bristow absorption tester – a review

2018 ◽  
Vol 33 (2) ◽  
pp. 279-296 ◽  
Author(s):  
Sami-Seppo Ovaska ◽  
Kaj Backfolk
Keyword(s):  
Special Focus ◽  
Print Quality ◽  
Substrate Roughness ◽  
Time Intervals ◽  
Absorption Properties ◽  
Liquid Absorption ◽  
Short Time ◽  
Printing Processes

Abstract This paper reviews the use of the Bristow Absorption Tester (known also as the Bristow wheel) in the characterization of fiber-based substrates. The Bristow wheel is a laboratory-scale instrument that has been designed for studying substrate wettability and dynamic liquid absorption properties in short time intervals, which are important in many converting and printing processes of paper and paperboard. The tester also gives information about substrate roughness. The Bristow wheel has shown great usefulness in predicting print quality especially in inkjet applications, in which a good correlation between print quality (letter area) and ink penetration rate has been found by several researchers. The apparatus is particularly useful in dynamic wetting studies, but it has also been successfully used in numerous other research purposes such as the determination of the degree of sizing, evaluation of material glueability, and various coatability studies. Modifications of both the testing principle and the tester structure have also been reported. These include e. g. equipping the apparatus with a corona unit that makes it possible to mimic a printing process on a relevant time-scale. This review summarizes the reported applications of Bristow wheel with a special focus on tester performance and versatility.

Novel approach for a precise determination of short-time intervals in ankle sprain experiments

2009 ◽  
Vol 42 (16) ◽  
pp. 2823-2825 ◽  
Author(s):  
Syn Schmitt ◽  
Mark Melnyk ◽  
Wilfried Alt ◽  
Albert Gollhofer
Keyword(s):  
Ankle Sprain ◽  
Precise Determination ◽  
Time Intervals ◽  
Novel Approach ◽  
Short Time

TÉCNICAS DE GEOPROCESSAMENTO NA CARACTERIZAÇÃO DE APPS NUMA MICROBACIA, EM FUNÇÃO DA LEGISLAÇÃO AMBIENTAL

2017 ◽  
Vol 32 (2) ◽  
pp. 184
Author(s):  
Sergio Campos ◽  
Gabriel Rondina Pupo da Silveira ◽  
Yara Manfrin Garcia ◽  
Mariana De Campos ◽  
Marcelo Campos
Keyword(s):  
Land Use ◽  
Supervised Classification ◽  
Satellite Image ◽  
Geographical Information ◽  
Environmental Legislation ◽  
Environmental Preservation ◽  
Recovery Planning ◽  
Short Time

Esse trabalho objetivou a utilização de técnicas de geoprocessamento na discriminação de classes de uso e ocupação do solo em áreas de APP, permitindo a constatação de futuras intervenções antrópicas que auxiliarão em fiscalizações ambientais. A microbacia com 183,19ha, situa-se entre as coordenadas geográficas 22o 44’ 41” a 22o  45’ 41” de latitude S e 48o 24’ 13” a 48o 25’ 01” de longitude WGr.  A base cartográfica utilizadas foi a carta topográfica de Botucatu para o georreferenciamento da imagem de satélite de 2008. O SIG-IDRISI Selva foi utilizado na classificação supervisionada e a determinação dos mapas temáticos. O uso da terra mostrou que a pastagem ocupa a maior parte da área (85,61%), mostrando com isso a predominância da pecuária regional. A imagem de satélite e a utilização do SIG mostraram-se importantes ferramentas, fornecendo resultados confiáveis num pequeno intervalo de tempo. Os dados obtidos auxiliarão nos futuros planejamentos de recuperação da microbacia, possibilitando verificar que a área não vem sendo ambientalmente preservada, pois a mesma apresenta somente 14,38% de vegetação e água, sendo que o mínimo exigido pela legislação do Código Florestal Brasileiro vigente é de 20%.PALAVRAS-CHAVE: Legislação ambiental, sistema de informação geográfica, preservação ambiental. GEOPROCESSING TECHNIQUES IN THE CHARACTERIZATION OF APPS IN MICROBABY, IN THE FUNCTION OF ENVIRONMENTAL LEGISLATIONABSTRACT: This work aimed at the use of geoprocessing techniques in the discrimination of classes of land use and occupation in areas of PPA, allowing the confirmation of future anthropogenic interventions that will aid in environmental inspections. The microbasin with 183.19 ha lies between the geographic coordinates 22o 44' 41"at 22o 45' 41" latitude S and 48o 24' 13"at 48o 25' 01" WGr longitude. The cartographic base used was the Botucatu topographic chart for the georeferencing of the satellite image of 2008. The SIG-IDRISI Selva was used in the supervised classification and the determination of thematic maps. Land use showed that pasture occupies most of the area (85.61%), thus showing the predominance of regional livestock. Satellite imagery and the use of GIS have proved to be important tools, providing reliable results in a short time. The data obtained will aid in the future recovery planning of the microbasin, making it possible to verify that the area is not environmentally preserved, since it presents only 14.38% of vegetation and water, and the minimum required by the Brazilian Forestry Code is of 20%.KEYWORDS: Environmental legislation, geographical information system, environmental preservation. 

scholarly journals HEMI-SYNTHESIS AND UV-VISIBLE SPECTROPHOTOMETRIC CHARACTERIZATION OF 2,4-DINITROPHENYLHYDRAZONES DERIVED FROM CITRAL AND CITRONELLAL ESSENTIAL OILS OF TWO AROMATIC PLANTS ACCLIMATIZED IN CONGO-BRAZZAVILLE

2021 ◽  
Vol 9 (03) ◽  
pp. 581-593
Author(s):  
Ndzeli Likibi Belline ◽  
◽  
Loubaki Milandou Laurent ◽  
Nsikabaka Samuel ◽  
Ouamba Jean-Maurille ◽  
...  
Keyword(s):  
Gas Chromatography ◽  
Essential Oils ◽  
Eucalyptus Citriodora ◽  
Easy Method ◽  
Uv Visible ◽  
Congo Brazzaville ◽  
High Level ◽  
Short Time

The orange-yellow and colorless essential oils with respective yields of 1.54% and 3.59% were extracted from the dry leaves of Cymbopogoncitratus (DC.) Stapf and Eucalyptus citriodora Hook. collected south of Brazzaville. Analysis by gas chromatography (GC) and by gas chromatography coupled with mass spectrometry (GC/MS) allowed the identification of fifteen (15) and eight (8) constituents representing (96.25%) and (98.46%) of total essential oils respectively. Cymbopogoncitratus oil consists mainly of geranial (51.99%) and neral (32.94%), two geometric isomers constituting citral which occupies a rate of 84.93%. While citronellal with a high level of (80.72%) and citronellol (10.48%) are the major compounds of the essential oil of Eucalyptus citriodora. Geranial (citral a) and citronellal 2,4-dinitrophenylhydrazones were hemi-synthesized by a simple, easy method, respectively from essential oils of Cymbopogoncitratus and Eucalyptus citriodora with respective conversion rate (yields) of 20%. and 37%, in a short time (three to five minutes). Analysis of geranial and citronellal 2,4-dinitrophenylhydrazones by UV-visible spectrophotometry showed maximum absorption wavelengths of 390 nm and 370 nm respectively. The UV-visible spectrophotometric method employed for the determination of these hydrazones is convenient, fast and simple. The hemi-synthesized hydrazones could be useful in the pharmaceutical industry, in perfumery, cosmetic and in biomedicine.

Simultaneous LC−MS/MS Determination of Reference Pharmaceuticals as a Method for the Characterization of the Caco-2 Cell Monolayer Absorption Properties

2002 ◽  
Vol 74 (20) ◽  
pp. 5273-5281 ◽  
Author(s):  
Patrice Larger ◽  
Maria Altamura ◽  
Rose-Marie Catalioto ◽  
Sandro Giuliani ◽  
Carlo Alberto Maggi ◽  
...  
Keyword(s):  
Cell Monolayer ◽  
Absorption Properties

scholarly journals The Beginning of Western Greek Amphorae Production in Western Sicily: Archaeometric and Archaeological Studies on 6th–5th Centuries BCE Amphorae Manufactured in Himera

Minerals ◽  
2020 ◽  
Vol 10 (9) ◽  
pp. 762
Author(s):  
Giuseppe Montana ◽  
Luciana Randazzo ◽  
Babette Bechtold
Keyword(s):  
Special Focus ◽  
Data Set ◽  
Reflected Light ◽  
Icp Ms ◽  
Economic Interaction ◽  
Western Sicily ◽  
Thin Section Petrography ◽  
Selection Of

About 560 western Greek amphorae (6th–5th centuries BCE) re-used in enchytrismos burials were unearthed in the necropolis of the Dorian-Chalcidian colony of Himera in northwestern Sicily. Among the most striking issues is the determination of their geographical provenance. For this purpose, ceramic samples chipped from freshly broken surfaces of all the amphorae were first subdivided into macrofabrics by the use of a hand lens. Thereon, the samples were studied in accordance with standardized methods by the use of reflected light microscopy. Due to the special focus of our project on the characterization of Sicilian productions, a selection of amphorae which showed visible, macroscopic affinities with the majority of the macrofabrics previously attributed to the region of Himera was submitted for thin-section petrography at the polarizing microscope and chemical analyses (ICP-MS and ICP/OES). This new data set was compared with reference samples investigated by previous research, referring to ceramic raw clays of the colony’s territory and local tablewares of the Iato K480-type. Our study confirms the local manufacture of the entire selection of transport vessels. The identification of a production of western Greek wine (?) amphorae in Himera dating mainly from the third quarter of the 6th to the first quarter of the 5th century BCE breaks new grounds in view of a better interpretation of the colony’s economic development during the later archaic period. Furthermore, it underlines Himera’s prominent position within the wider frame of regional economic interaction.

Characterization of Impressed Current Technique to Model Corrosion of Reinforcement in Concrete

2020 ◽  
Vol 11 (1) ◽  
pp. 93-99
Author(s):  
Abu Zakir Morshed ◽  
Sheikh Shakib ◽  
Tanzim Jahin
Keyword(s):  
Immersion Time ◽  
Chloride Content ◽  
Engineering Science ◽  
Coastal Regions ◽  
Faraday’S Law ◽  
Current Technique ◽  
Corrosion Cell ◽  
Impressed Current

Corrosion of reinforcement is an important durability concern for the structures exposed to coastal regions. Since corrosion of reinforcement involves long periods of time, impressed current technique is usually used to accelerate the corrosion of reinforcement in laboratories. Characterization of impressed current technique was the main focus of this research,which involved determination of optimum chloride content and minimum immersion time of specimens for which the application of Faraday’s law could be efficient. To obtain optimum chloride content, the electrolytes in the corrosion cell were prepared similar to that of concrete pore solutions. Concrete prisms of 200 mm by 200 mm by 300 mm were used to determine the minimum immersion time for saturation. It was found that the optimum chloride content was 35 gm/L and the minimum immersion time for saturation was 140 hours. Accounting the results, a modified expression based on Faraday’s law was proposed to calculate weight loss due to corrosion. Journal of Engineering Science 11(1), 2020, 93-99

The Determination of Sense via Deleuze and Blanchot: Paradoxes of the Habitual, the Immemorial, and the Eternal Return

2008 ◽  
Vol 2 (2) ◽  
pp. 155-177 ◽  
Author(s):  
Eugene Brently Young
Keyword(s):  
Eternal Return

Eternal return is the paradox that accounts for the interplay between difference and repetition, a dynamic at the heart of Deleuze's philosophy, and Blanchot's approach to this paradox, even and especially through what it elides, further illuminates it. Deleuze draws on Blanchot's characterisations of difference, forgetting, and the unlivable to depict the ‘sense’ produced via eternal return, which, for Blanchot, is where repetition implicates or ‘carries’ pure difference. However, for Deleuze, difference and the unlivable are also developed by the living repetition or ‘contraction’ of habit, which results in his distinctive characterization of ‘force’, ‘levity’, and sense in eternal return.

Proposal of PV Output Estimate Method in Short Time Intervals

2016 ◽  
Vol 136 (12) ◽  
pp. 891-897 ◽  
Author(s):  
Katsuhiro Matsuda ◽  
Kazuhiro Misawa ◽  
Hirotaka Takahashi ◽  
Kenta Furukawa ◽  
Satoshi Uemura
Keyword(s):  
Time Intervals ◽  
Estimate Method ◽  
Short Time
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