A new online image analyzer for macrocontaminants in recycled pulps

TAPPI Journal ◽  
2012 ◽  
Vol 11 (2) ◽  
pp. 19-28 ◽  
Author(s):  
MICHELLE RICARD ◽  
GILLES DORRIS ◽  
SYLVAIN GENDRON ◽  
NATALIE PAGÉ ◽  
DENISE FILION ◽  
...  
Keyword(s):  
Image Analysis ◽  
Water Surface ◽  
High Density ◽  
Image Analyzer ◽  
Low Density ◽  
Direct Link ◽  
Online Mode ◽  
Recycled Pulp ◽  
Data Control

A new image analysis-based instrument has been developed for measurement of low density and high density macrocontaminants from recycled pulp or whitewater. The unit is coupled to a pulp classifier that isolates the contaminants from pulp and concentrates them before their transfer to a specialized chamber that further separates the contaminants based on their relative density to water. The low density contaminants float on the water surface, whereas the high density macrocontaminants sink onto the settling plate, where images of both contaminant types are then captured and analysed. Through image analysis, the high density contaminants are further classified into two categories: contaminants that are whitish in color and mainly comprised of stickies are named heavy stickies, whereas contaminants that are blackish in color and comprised of black toners and dark wood components are named dirt. When operating in the online mode with autosamplers delivering the samples to the pulp classifier, the instrument provides macrocontaminant determinations every 15 min. The total count and surface area of both types of macrocontaminants per kilograms of pulp can then be sent by direct link to the mill data control system, allowing an effective follow-up of macrocontaminant changes in process pulps and waters. The unit also allows the user to view images of the contaminants. The analyzer results obtained in terms of number and area of macrocontaminants show a linear relationship with TAPPI T-277 om-07 “Macro stickies content in pulp: the ‘pick-up’ method.”

scholarly journals HIV and cART-Associated Dyslipidemia Among HIV-Infected Children

2019 ◽  
Vol 8 (4) ◽  
pp. 430 ◽  
Author(s):  
Birkneh Tilahun Tadesse ◽  
Byron Alexander Foster ◽  
Adugna Chala ◽  
Tolossa Eticha Chaka ◽  
Temesgen Bizuayehu ◽  
...  
Keyword(s):  
Antiretroviral Therapy ◽  
Lipid Profile ◽  
Clinical Data ◽  
High Density ◽  
Low Density ◽  
Combination Antiretroviral Therapy ◽  
High Prevalence ◽  
Treatment Naïve ◽  
Lipid Abnormalities

Background: Persistent dyslipidemia in children is associated with risks of cardiovascular accidents and poor combination antiretroviral therapy (cART) outcome. We report on the first evaluation of prevalence and associations with dyslipidemia due to HIV and cART among HIV-infected Ethiopian children. Methods: 105 cART naïve and 215 treatment experienced HIV-infected children were enrolled from nine HIV centers. Demographic and clinical data, lipid profile, cART type, adherence to and duration on cART were recorded. Total, low density (LDLc) and high density (HDLc) cholesterol values >200 mg/dL, >130 mg/dL, <40 mg/dL, respectively; and/or, triglyceride values >150 mg/dL defined cases of dyslipidemia. Prevalence and predictors of dyslipidemia were compared between the two groups. Results: prevalence of dyslipidemia was significantly higher among cART experienced (70.2%) than treatment naïve (58.1%) children (p = 0.03). Prevalence of low HDLc (40.2% versus 23.4%, p = 0.006) and hypertriglyceridemia (47.2% versus 35.8%, p = 0.02) was higher among cART experienced than naïve children. There was no difference in total hypercholesterolemia and high LDLc levels. Nutrition state was associated with dyslipidemia among cART naïve children (p = 0.01). Conclusion: high prevalence of cART-associated dyslipidemia, particularly low HDLc and hypertriglyceridemia was observed among treatment experienced HIV-infected children. The findings underscore the need for regular follow up of children on cART for lipid abnormalities.

scholarly journals An Evaluation of the Metabolic Profile in Total Thyroidectomy

2017 ◽  
Vol 24 (1) ◽  
pp. 201717
Author(s):  
Ismail Zihni ◽  
Burcu Zihni ◽  
Oktay Karakose ◽  
Huseyin Pülat ◽  
Kazım Ozcelik ◽  
...  
Keyword(s):  
Total Cholesterol ◽  
Total Thyroidectomy ◽  
Metabolic Profile ◽  
Density Lipoprotein ◽  
High Density ◽  
Metabolic Parameters ◽  
Low Density ◽  
Close Monitoring ◽  
Arterial Blood

Aim: To investigate the relationship between metabolic parameters and thyroid hormone changes which occur in patients treated with thyroid replacement therapy following total thyroidectomy. Material and Method: The study comprised 30 patients who underwent total thyroidectomy. Evaluations were made preoperatively and after 6 and 12 months postoperatively. Body mass index was calculated by recording height and weight of all patients, waist size was measured, arterial blood pressure was measured with a sphyngomanometer on the right arm after 10 mins of rest. Peripheral blood samples were taken after 12-hour fasting for the evaluation of low density lipoprotein, high density lipoprotein, total cholesterol, triglyceride, fasting glucose, fasting insulin, thyroid stimulating hormone, free T3, free T4, C-reactive protein, and haemoglobin A1c values.Results: In the postoperative 1-year follow-up, a significant increase was determined in total cholesterol, low-density protein and triglyceride levels, which are related to cardiovascular risk, but no significant change was determined in high density protein levels. In addition, a significant increase was determined in the postoperative trend of both systolic and diastolic arterial blood pressures compared to the preoperative values.Conclusion: Although euthyroid was achieved with follow-up of thyroid functions in the patients who underwent bilateral total thyroidectomy, it was found that there could be changes in metabolic parameters. Therefore, with close monitoring of the metabolic profile of these patients, it can be recommended that lifestyle changes are made when medical intervention is insufficient.

scholarly journals Clinical impact of high density mapping in atypical atrial flutters ablation: outlining critical circuits in complex atrial tachycardias

2021 ◽  
Vol 42 (Supplement_1) ◽  
Author(s):  
A Di Cori ◽  
L Mazzocchetti ◽  
M Parollo ◽  
S Della Volpe ◽  
V Barletta ◽  
...  
Keyword(s):  
Retrospective Analysis ◽  
Atrial Flutter ◽  
Clinical Impact ◽  
High Density ◽  
Mapping Technique ◽  
Low Density ◽  
Single Center ◽  
Density Mapping ◽  
Procedural Outcomes

Abstract Introduction Mapping and ablation of atypical atrial flutter (AFL) continue to be a challenge for clinical electrophysiologists. The advent of high-density (HD) mapping has allowed the generation of electro-anatomic maps with a very high resolution level. Purpose In this single center retrospective analysis, we evaluated the clinical impact of the ultra HD activation sequence mapping compared with the standard low density (LD) ablation catheter mapping technique in the treatment of AFLs. Methods We performed a 7 years-single center retrospective analysis of patients undergoing radiofrequency ablations (RFA) for right and left atypical AFL. We evaluated procedural and clinical outcomes of patients approached with a Low Density (LD) electro-anatomical (EAM) strategy compared with patients mapped with new automatic multipolar HD Mapping (HD Group). Results Seventy-five patients were included. Patients were almost male (60%), relatively old (65±8 years), with a moderate CHA2DS2Vasc score (2.3±1.3), a preserved ejection fraction (58±6) and moderate atrial dilatation (44±7 mm). Baseline clinical characteristics were comparable between groups (p=NS). Among 88 AFLs, 10 (11%) were located in the right and 78 (89%) in the left atrium, including 22 (28%) roof dependent and 37 (47%) mitral dependent (p=NS). Regarding procedural outcomes, Sinus rhythm restoration during ablation was more frequently observed in the HD Group (79% vs 56%, p=0.037), even if no differences in mapping time, procedural time and radiological dose were observed (p=NS). Freedom from AFL/atrial fibrillation (AF) at 1-year was lower in the HD Group (83% vs 45%, p=0.009) with an increased trend for AF recurrences during long term follow-up (17% vs 23% at 1 and 3-years respectively, p=0.059). At the multivariate analysis, HD map (OR 0,17; 95% CI 0,04–0,66) and younger age (OR 1,09; 95% CI 1,01–1,19) were identified as independent predictors of ablation success at 1 year. Conclusions Acute procedural success of ablation of atypical atrial flutter is higher in case of HD mapping strategy. Patient age and HD strategy resulted independent predictors of overall atrial arrhythmias recurrences. During follow-up, AFL recurrences are rare beyond 12 months, differently from AF which continues to show increasing trends. FUNDunding Acknowledgement Type of funding sources: None. Procedural outcomes Atypical atrial flutter HD map

Automated Image Analysis Of Nuclear And Cytoplasmic Changes In Exfoliated Cells From Tracheas Treated With Carcinogen

1977 ◽  
Vol 35 ◽  
pp. 220-221
Author(s):  
S.F. Stinson ◽  
J.C. Lilga ◽  
M.B. Sporn
Keyword(s):  
Image Analysis ◽  
Pattern Analysis ◽  
Relative Proportion ◽  
Automated Image Analysis ◽  
Image Analyzer ◽  
Cross Sectional ◽  
Exfoliated Cells ◽  
Neoplastic Lesions ◽  
Analysis System ◽  
Morphologic Criterion

Increased nuclear size, resulting in an increase in the relative proportion of nuclear to cytoplasmic sizes, is an important morphologic criterion for the evaluation of neoplastic and pre-neoplastic cells. This paper describes investigations into the suitability of automated image analysis for quantitating changes in nuclear and cytoplasmic cross-sectional areas in exfoliated cells from tracheas treated with carcinogen.Neoplastic and pre-neoplastic lesions were induced in the tracheas of Syrian hamsters with the carcinogen N-methyl-N-nitrosourea. Cytology samples were collected intra-tracheally with a specially designed catheter (1) and stained by a modified Papanicolaou technique. Three cytology specimens were selected from animals with normal tracheas, 3 from animals with dysplastic changes, and 3 from animals with epidermoid carcinoma. One hundred randomly selected cells on each slide were analyzed with a Bausch and Lomb Pattern Analysis System automated image analyzer.

Quantitative defect studies in semiconductor TEM samples prepared by low angle ion milling

1995 ◽  
Vol 53 ◽  
pp. 512-513
Author(s):  
L. Mulestagno ◽  
J.C. Holzer ◽  
P. Fraundorf
Keyword(s):  
Sample Preparation ◽  
Milling Time ◽  
High Density ◽  
Low Density ◽  
Ion Milling ◽  
High Quality ◽  
Variable Angle ◽  
Major Disadvantage ◽  
Induced Defects

Due to the wealth of information, both analytical and structural that can be obtained from it TEM always has been a favorite tool for the analysis of process-induced defects in semiconductor wafers. The only major disadvantage has always been, that the volume under study in the TEM is relatively small, making it difficult to locate low density defects, and sample preparation is a somewhat lengthy procedure. This problem has been somewhat alleviated by the availability of efficient low angle milling.Using a PIPS® variable angle ion -mill, manufactured by Gatan, we have been consistently obtaining planar specimens with a high quality thin area in excess of 5 × 104 μm2 in about half an hour (milling time), which has made it possible to locate defects at lower densities, or, for defects of relatively high density, obtain information which is statistically more significant (table 1).

Correlation of Pore Structure and Permeability by SEM-Image Analysis

1990 ◽  
Vol 48 (1) ◽  
pp. 428-429
Author(s):  
C. A. Callender ◽  
Wm. C. Dawson ◽  
J. J. Funk
Keyword(s):  
Image Analysis ◽  
Pore Structure ◽  
Imaging System ◽  
Pore Space ◽  
Simulation Models ◽  
Image Analyzer ◽  
Imaging Data ◽  
Sem Images ◽  
Thin Sections ◽  
Rock Types

The geometric structure of pore space in some carbonate rocks can be correlated with petrophysical measurements by quantitatively analyzing binaries generated from SEM images. Reservoirs with similar porosities can have markedly different permeabilities. Image analysis identifies which characteristics of a rock are responsible for the permeability differences. Imaging data can explain unusual fluid flow patterns which, in turn, can improve production simulation models.Analytical SchemeOur sample suite consists of 30 Middle East carbonates having porosities ranging from 21 to 28% and permeabilities from 92 to 2153 md. Engineering tests reveal the lack of a consistent (predictable) relationship between porosity and permeability (Fig. 1). Finely polished thin sections were studied petrographically to determine rock texture. The studied thin sections represent four petrographically distinct carbonate rock types ranging from compacted, poorly-sorted, dolomitized, intraclastic grainstones to well-sorted, foraminiferal,ooid, peloidal grainstones. The samples were analyzed for pore structure by a Tracor Northern 5500 IPP 5B/80 image analyzer and a 80386 microprocessor-based imaging system. Between 30 and 50 SEM-generated backscattered electron images (frames) were collected per thin section. Binaries were created from the gray level that represents the pore space. Calculated values were averaged and the data analyzed to determine which geological pore structure characteristics actually affect permeability.

Scanning Electron Microscopic and Electrophoretic Observations on Barium Sulphate Used to Adsorb Clotting Factors

1975 ◽  
Vol 33 (02) ◽  
pp. 256-270
Author(s):  
R. M Howell ◽  
S. L. M Deacon
Keyword(s):  
Electron Microscopy ◽  
Factor Xa ◽  
Barium Sulphate ◽  
High Density ◽  
Low Density ◽  
Factor X ◽  
Clotting Factors ◽  
Electron Microscopic ◽  
Complementary Techniques ◽  
Scanning Electron

SummaryElectron microscopy and particle electrophoresis were found to be complementary techniques with which to complete the physical data from an earlier study on barium sulphates used to adsorb clotting factors from serum. The differences revealed by scanning electron microscopy (S. E. M.) in the physical shape of low and high density grades of barium sulphate particles appear to be of greater significance than charge as expressed by electrophoretic mobility, in determining whether or not precursor or preformed factor Xa is eluted.This conclusion was based on the finding that at pH values close to 7, where the adsorption from serum occurs, all samples with the exception of natural barytes were uncharged. However as the high-density, or soil-grade, was found by S. E. M. to consist of large solid crystals it was suggested that this shape might induce activation of factor X as a result of partial denaturation and consequent unfolding of the adsorbed protein. In contrast, uptake of protein into the centre of the porous aggregates revealed by S. E. M. pictures of low-density or X-ray grade barium sulphate may afford protection against denaturation and exposure of the enzyme site.The porous nature of particles of low-density barium sulphate compared with the solid crystalline forms of other grades accounts not only for its lower bulk density but also for its greater surface/gram ratio which is reflected by an ability to adsorb more protein from serum.Neither technique produced evidence from any of the samples to indicate the presence of stabilising agents sometimes used to coat particles in barium meals.

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