Microfibril angles of softwood and hardwood pulp fibres

Slides:

Advertisements

Similar presentations

POWERPOINT PRESENTATION ON POLARISED MICROSCOPE

Advertisements

Refining characteristics of Northern and Southern bleached Softwood Kraft B. Palmer Tappsa Conference October 2010.

Frank Hada and Jackie Boyd Fox Valley Camera Club March 13, 2007.

Image Quilting for Texture Synthesis and Transfer Alexei A. Efros1,2 William T. Freeman2.

Solar Polar Field Observed by SOHO/MDI and Hinode Yang Liu Stanford University 10/01/ Hinode Workshop.

Computer Vision Introduction to Image formats, reading and writing images, and image environments Image filtering.

Softwood Microanatomy

Quantification of collagen orientation in 3D engineered tissue

”Wood Defects” Knots, Spiral Grain, Juvenile Wood, and Reaction Wood

A Novel 2D To 3D Image Technique Based On Object- Oriented Conversion.

1 Wood Chemistry PSE 406 Tree & Wood Structure. 2 Agenda lTree components »Stem, crown, roots »Hardwood versus softwood lMacro wood structure »Reaction.

A new rule of mixtures for natural fibre composites Amandeep Singh Virk a, Wayne Hall b, John Summerscales c a. University of Queensland, Australia b.

Identification of minerals with the petrographic microscope

MECH 450 – Pulping and Papermaking Topic 2 - Natural Resources James A. Olson, Nici Darychuk Pulp and Paper Centre, Department of Mechanical Engineering,

Digital Image Processing Image Enhancement Part IV.

LCD Screens ‘How it works?’. LCD ScreensOutput devices LCD Screens Liquid crystal display (LCD) screens are visual display units. An LCD is made up of.

Forestry 280: Hand lens cross- sections,Woods 1-13: Softwoods with normal resin canals  Views are presented to approximate observation with a 10x hand.

When light passes from vacuum (index of refraction n = 1) into water (n = 1.333), Q the wavelength increases and the frequency is unchanged 2. the.

Softwood anatomy.

Stuti Misra Dipika V. Patel Jennifer P. Craig Charles N.J. McGhee Department of Ophthalmology, New Zealand-National Eye Centre, Faculty of Medical & Health.

1 Reaction wood is formed as a response by the tree to a triggering event such as tipping from the vertical. It is also known to regulate the orientation.

Light Microscope.

Biology 227: Methods in Modern Microscopy Andres Collazo, Director Biological Imaging Facility Yonil Jung, Graduate Student, TA Week 10 Multispectral Imaging.

Date of download: 9/19/2016 Copyright © 2016 SPIE. All rights reserved. (a) Overview of a quantitative backscattered electron imaging (qBEI) image with.

S2 Lumen Primary Wall Secondary Wall -- S1, S2, S3 Primary Wall very thin and stretchable present when cells enlarging. Microfibrils randomly arranged.

Chromospheric Evershed flow

Measuring Birefringence of Anisotropic Crystals

Journal of Vision. 2008;8(3):33. doi: / Figure Legend:

Supplemental Figure 1 Supplemental Figure 1: Electron Force Microscopy image of a DBS filter incubated with human blood.

11 T dipole coil features and dimensions

Splenic proliferative lymphoid nodules distinct from germinal centers are sites of autoantigen stimulation in immune thrombocytopenia by Capucine Daridon,

Flying Drosophila Orient to Sky Polarization

T. J. Okamoto (NAOJ/Kyoto Univ.)

Reaction Wood Reaction wood is formed as a response by the tree to a triggering event such as tipping from the vertical. It is also known to regulate the.

A. Williams, Y. Qian, D. Bear, C.R. Chu Osteoarthritis and Cartilage

Your Lecture you only have 8 minutes MAX 8 slides Start off with title Then give a 1 or 2 sentence introduction and conclusion Give me a topic/research.

Volume 91, Issue 12, Pages (December 2006)

Polarized Light Helps Monarch Butterflies Navigate

Microscopes Always use 2 hands to carry; one on the arm and one on the base Plug in; turn light on.

Hans Elmlund, Dominika Elmlund, Samy Bengio Structure

VPCR OVERVIEW The banjo fitting, from Cummins ISL16 330, is not oriented to install the remote fuel filter. As shown in the picture #1(next slide), the.

A polarized light microscopy method for accurate and reliable grading of collagen organization in cartilage repair A. Changoor, N. Tran-Khanh, S. Méthot,

Emily I. Bartle, Tara M. Urner, Siddharth S. Raju, Alexa L. Mattheyses

Microtubule Structure at 8 Å Resolution

Structural characteristics of the collagen network in human normal, degraded and repair articular cartilages observed in polarized light and scanning.

Reticulated regions comprise cells with heavily suberized walls.

Volume 109, Issue 12, Pages (December 2015)

Volume 74, Issue 5, Pages (May 1998)

Direct Visualization of Lipid Domains in Human Skin Stratum Corneum's Lipid Membranes: Effect of pH and Temperature I. Plasencia, L. Norlén, L.A. Bagatolli

Reaction Wood Reaction wood is formed as a response by the tree to a triggering event such as tipping from the vertical. It is also known to regulate the.

Dual-Channel Two-Photon Microscopy Study of Transdermal Transport in Skin Treated with Low-Frequency Ultrasound and a Chemical Enhancer Joseph Kushner,

Fig. 2. Centrosomal proteins display distinct localizations and radial distances from centriole walls.U2OS cells were fixed and stained with the indicated.

Polarized Fluorescence Resonance Energy Transfer Microscopy

Digitized landmarks (1–13) for thin plate spline analysis of body morphology and area measured for skin reflectance. Digitized landmarks (1–13) for thin.

Immunohistochemistry of human DLB brains.

Emily I. Bartle, Tara M. Urner, Siddharth S. Raju, Alexa L. Mattheyses

Orientation Selectivity Sharpens Motion Detection in Drosophila

Baroreflex function measured by the modified Oxford method during baseline euglycemia (circles) and hypoglycemia (triangles). Baroreflex function measured.

Nanoscale adhesive geometry modulates integrin–FN clustering.

Chronological changes of pSer46-MARCKS in human α-Syn-BAC-Tg/GBA-hetero-KO mice. pSer46-MARCKS and pSer129-α-Syn were costained in human normal α-Syn-BAC-Tg/glucocerebrosidase.

TeNT did not affect lysosome fusion.

Thy1S promoter drives sparse expression of hrGFP in marmoset cortex.

Artistic Rendering Final Project Initial Proposal

Determination of microtubule polarity by cryo-electron microscopy

Fig. 4 Imaged polarization effects.

Scatterplot of the log of infarct signal intensity on DW images versus the log of hours from symptom onset. Scatterplot of the log of infarct signal intensity.

Laurdan Fluorescence Lifetime Discriminates Cholesterol Content from Changes in Fluidity in Living Cell Membranes Ottavia Golfetto, Elizabeth Hinde,

Presentation transcript:

Microfibril angles of softwood and hardwood pulp fibres S. Heinemann, E. Retulainen COST FP1105 Workshop, 8.-9.5.2014 Coimbra, Portugal

MFA measurement by polarised light Microscopic method modified according to Chun & Sundström fibre sample between crossed polarisation filters 10°-stepwise rotating crossed filters fibre imaging determining the fibre position (angle versus horizontal) selecting region of interest (ROI) ascertaining the ROI-light intensity fitting the intensity data as a function of the crossed filter position (sinusoidal function) determining MFA from maximum intensity points white light Chun & Sundström (1997)

Microscopic imaging Analyser 30° 50° 70° 90° 110° 120° Polarizer 140° 160° 180° 200° Example softwood earlywood fibres – pine (middle), spruce (right)

Image analysis – ROI light intensity software earlywood fibres (pine 1 and spruce 2) ZEN software (Zeiss) 1 pine Area 134.000 pixel2 Intensity Mean Value 150.448 2 29 fibre position (angle versus horizontal) Pine (1) Spruce (2) ROI size, µm² 87.3 23.0 MFA, ° 29 42 / 39

MFA range of softwood and hardwood pulps MFA results MFA range of softwood and hardwood pulps Softwood Eucalyptus unrefined 3 – 45 3 – 44 100 / 50 kWh/t 2 – 42 3 – 33 200 kWh/t 7 – 43 3 – 43 Tendency corresponding to observations by Vainio et al (2007) Many fibres to be measured for statistical confidence

Light intensity versus MFA MFA results Light intensity versus MFA in light microscopy, determined MFA is average from all wall layers and structures latewood – oriented S2-layer dominates = clearer result, low angles earlywood – S1 and S3 affect result = higher average angles

TECHNOLOGY FOR BUSINESS Final slide is optional in VTT’s internal presentations Thank you!