scholarly journals Standardized Procedure of Measuring the pH Value of Cement Matrix Material by Ex-Situ Leaching Method (ESL)

Crystals ◽  
2021 ◽  
Vol 11 (4) ◽  
pp. 436
Author(s):  
Wei-Chien Wang ◽  
Wei-Hsing Huang ◽  
Ming-Yu Lee ◽  
Hoang Trung Hieu Duong ◽  
Ya-Hui Chang
Keyword(s):  
Ph Value ◽  
Standard Procedure ◽  
Matrix Material ◽  
National Research Council ◽  
Ex Situ ◽  
Cement Matrix ◽  
Good Repeatability ◽  
Repeatability And Reproducibility ◽  
Test Process ◽  
Measuring Ph

According to the Spanish National Research Council (CSIC) report, the ex-situ leaching method (ESL) is more appropriate and accurate than other methods for measuring pH value in terms of repeatability and reproducibility. In this study, the ESL method was used to measure the pH value of cement matrix materials. The design test process aimed to avoid underestimating the variation in pH during the process of solution stirring and pH measurement without using both argon and nitrogen to block the specimen contact with air, with good repeatability and reproducibility. This study also considered the influence of the dryness of the specimen before crushing, the size of the powder, the air-exposed specimen, the air-exposed solution, the temperature of the solution, etc. After testing and analysis, a standard procedure for detecting the pH value of cement matrix materials was established which is known as the S-ESL method.

scholarly journals Interchangeability of light and virtual microscopy for histopathological evaluation of prostate cancer

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Renata Zelic ◽  
Francesca Giunchi ◽  
Luca Lianas ◽  
Cecilia Mascia ◽  
Gianluigi Zanetti ◽  
...  
Keyword(s):  
Prostate Cancer ◽  
Virtual Microscopy ◽  
Observer Agreement ◽  
Gleason Grade ◽  
Gleason Grading ◽  
Gleason Pattern ◽  
Inter Observer Variability ◽  
Histopathological Evaluation ◽  
Good Repeatability ◽  
Repeatability And Reproducibility

AbstractVirtual microscopy (VM) holds promise to reduce subjectivity as well as intra- and inter-observer variability for the histopathological evaluation of prostate cancer. We evaluated (i) the repeatability (intra-observer agreement) and reproducibility (inter-observer agreement) of the 2014 Gleason grading system and other selected features using standard light microscopy (LM) and an internally developed VM system, and (ii) the interchangeability of LM and VM. Two uro-pathologists reviewed 413 cores from 60 Swedish men diagnosed with non-metastatic prostate cancer 1998–2014. Reviewer 1 performed two reviews using both LM and VM. Reviewer 2 performed one review using both methods. The intra- and inter-observer agreement within and between LM and VM were assessed using Cohen’s kappa and Bland and Altman’s limits of agreement. We found good repeatability and reproducibility for both LM and VM, as well as interchangeability between LM and VM, for primary and secondary Gleason pattern, Gleason Grade Groups, poorly formed glands, cribriform pattern and comedonecrosis but not for the percentage of Gleason pattern 4. Our findings confirm the non-inferiority of VM compared to LM. The repeatability and reproducibility of percentage of Gleason pattern 4 was poor regardless of method used warranting further investigation and improvement before it is used in clinical practice.

scholarly journals Determination of Cr (VI) Content in Water-Soluble Dyes

2020 ◽  
Vol 59 (1) ◽  
pp. 88-94
Author(s):  
M P Sathianarayanan ◽  
Rina Nayak ◽  
Yogesh Hande
Keyword(s):  
Spectroscopic Analysis ◽  
Extraction Procedure ◽  
Cost Effective ◽  
High Load ◽  
Water Soluble ◽  
Recovery Study ◽  
Good Repeatability ◽  
Repeatability And Reproducibility ◽  
Standard Solution

Abstract Hexavalent chromium detection in the presence of high load of colorants is a challenge, and it is an important area of study. Colorants are a class of interfering substance in many spectroscopic analysis and chromatographic separation and detection. In this study, a method has been developed to separate out Cr (VI) and water-soluble dyes by using activated charcoal as an absorption medium. The extraction procedure was optimized with Cr (VI) standard solution for quantification. The efficacy of the extraction procedure for the removal of water-soluble dyes and detection of Cr (VI) was checked with a spike recovery study. Based on the spike recovery study, the method has been validated as per the international validation protocol. The method is simple, cost effective and has a detection limit down up to 3.0 mg/kg. The recovery rate of Cr (VI) in water-soluble dyes like reactive yellow HE 6G, reactive red 218, turquoise blue HGN, reactive navy blue RX and reactive black 5A was found to be more than 90% with a good repeatability and reproducibility.

Microwave Oven Drying Determination of Total Solids in Processed Tomato Products: Collaborative Study

1985 ◽  
Vol 68 (6) ◽  
pp. 1081-1083
Author(s):  
Henry B Chin ◽  
John R Kimball ◽  
Joyce Hung ◽  
Bradford Allen
Keyword(s):  
Collaborative Study ◽  
Microwave Oven ◽  
Drying Method ◽  
Vacuum Oven ◽  
Oven Drying ◽  
Total Solids ◽  
Good Repeatability ◽  
Repeatability And Reproducibility ◽  
Tomato Products ◽  
Solids Content

Abstract Fourteen laboratories analyzed 7 samples of tomato products with total solids content ranging from 6.5 to 40.2%. Samples were analyzed directly with the exception of samples with solids contents greater than 15%, which were diluted with water (1 + 1 for up to 30% solids and 1 + 3 for greater than 30% solids). The 2-4 g samples were dried at 100% power for 4 min. The results of the collaborative study showed good repeatability and reproducibility: 5„ = 0.16 (CV = 0.46%) and S, = 0.36 (CV = 1.06%) for the higher solids samples and S„ = 0.37 (CV = 3.76%) and Sx = 0.14 (CV = 1.41%) for samples with total solids up to 15%. Results were compared with those obtained using vacuum oven drying. No difference was seen in the results by the 2 methods at the 95% level of confidence. The microwave oven drying method has been adopted official first action as an alternative to the vacuum oven drying method for total solids.

scholarly journals Distraction index measurement on the dog's hip joint using a dedicated software

2020 ◽  
Vol 72 (4) ◽  
pp. 1241-1247 ◽  
Author(s):  
S. Alves-Pimenta ◽  
A. Santana ◽  
J. Martins ◽  
B. Colaço ◽  
L. Gonçalves ◽  
...  
Keyword(s):  
Computer Software ◽  
Software Tool ◽  
Measurement Tool ◽  
Specific Training ◽  
Hip Joints ◽  
Index Measurement ◽  
Analysis Center ◽  
Good Repeatability ◽  
Repeatability And Reproducibility ◽  
Measurement Repeatability

ABSTRACT The aim of this study was to test the accuracy of a new automated computer software tool for the assessment of passive hip laxity. The hip laxity was estimated using the dedicated computer software by two blinded evaluators, one previously trained and one without specific training for distraction index measurement, in two independent sessions using 230 hip joints from 115 dogs that underwent screening for passive hip laxity using the distraction view. Previously, all of these radiographs were sent to PennHIP Analysis Center for an official distraction index record. The measurement repeatability of the two sessions was adequate for both evaluators. The reproducibility of the official distraction index measurement, mean distraction index±standard deviation 0.44±0.15, was adequate (P>0.05) for the trained evaluator, 0.44±0.15, and non-adequate (P<0.05), for the non-trained evaluator 0.47±0.17. The distraction index measurement tool proposed can be used with confidence for hip laxity evaluation by trained evaluators, as it provided good repeatability and reproducibility of official reports. The simplicity of the process described leads to a less time-consuming and more affordable procedure.

scholarly journals KUALITAS AIR SUNGAI DI DESA TANIPAH (GAMBUT PANTAI), KALIMANTAN SELATAN

2018 ◽  
Vol 5 (1) ◽  
pp. 1
Author(s):  
Rahmat Eko Sanjaya ◽  
Rilia Iriani
Keyword(s):  
Water Quality ◽  
Dissolved Oxygen ◽  
River Water ◽  
Sea Water ◽  
Ph Value ◽  
Iron Concentration ◽  
Quality Standard ◽  
Ex Situ ◽  
Class Iii

Tanipah village is a coastal village in Kecamatan Aluh-Aluh, Kabupaten Banjar, Kalimantan Selatan and a tidal area of sea water. Tanipah villagers utilize river water for daily needs, so the quality of river water is a major concern. The results of this research are expected to be informations for the community about quality of river water in Tanipah. This research is a survey research and the analysis was conducted in-situ and ex-situ. The analysis was done by comparing the test result against the predefined quality standard. River water temperature in Tanipah ranges from 28<sup>0</sup>C – 33,6<sup>0</sup>C and has no taste and no smell. Turbidity of 54,8 NTU, indicating river water is not feasible for consumption. Dissolved oxygen is 5,9 mg/L and is in the mild contaminated category. The COD and BOD value respectively 17,03 mg/L and 6,70 mg/L, exceeds the limit of the class I water quality standard. The pH value is at 7,33, indicating that the pH is normal. The iron concentration is 1,71 mg/L, exceeds the maximum permissible level for drinking water quality. Other metals likes Mn, Pb, Cu and Cd, are within thresholds for the waters. River water in Tanipah village based on the value of dissolved oxygen, is in category of light contaminated. Thus, in general, river water in Tanipah village can only be used for class III water, as irrigation.

Fate of Listeria monocytogenes during the Manufacture, Ripening and Storage of Feta Cheese

1989 ◽  
Vol 52 (2) ◽  
pp. 82-87 ◽  
Author(s):  
DEMETRIOS K. PAPAGEORGIOU ◽  
ELMER H. MARTH
Keyword(s):  
Listeria Monocytogenes ◽  
Ph Value ◽  
Standard Procedure ◽  
Starter Culture ◽  
Lactobacillus Bulgaricus ◽  
Cheese Making ◽  
Initial Inoculum ◽  
Feta Cheese ◽  
Salt Brine ◽  
And Storage

The ability of Listeria monocytogenes to grow during the Feta cheese-making process, and to survive during ripening, and storage of the cheese was examined. Pasteurized whole cow's milk was inoculated to contain ca. 5.0 × 103 L. monocytogenes [strain Scott A or California (CA)] cfu/ml and made into Feta cheese according to standard procedure. Lactobacillus bulgaricus, and Streptococcus thermophilus (1:1, v/v) were used as starter culture (1%, v/v). Fresh cheese was placed into sterile 12% salt brine and was held at 22°C for 24 h. Then it was placed into sterile 6% salt brine and held 4 d at 22°C after which it was stored in the same brine at 4°C. Milk, curd, whey, cheese, and brine were tested for numbers of L. monocytogenes and pH. Duplicate samples were used to enumerate L. monocytogenes by surface-plating on McBride Listeria Agar. Selected Listeria colonies were confirmed biochemically, L. monocytogenes was entrapped in curd during cheese-making with the population in curd being 0.92 Log10 cfu/g greater than in the inoculated milk; the whey contained an average of 3.2% of the initial inoculum. L. monocytogenes in cheese increased in numbers by ca. 1.5 Log10 cfu/g during the first 2 d of ripening, the population was 2.33 (S.D. ± 0.12) Log10 cfu/g greater in cheese than in the inoculated milk, with a maximum number of 1.5 × 106 cfu/g. The pH value of 2-d-old cheese decreased to 4.6 and then growth of L. monocytogenes ceased. Both strains of L. monocytogenes survived in Feta cheese for more than 90 d even at the low pH of 4.30 (S.D. ± 0.05) that Feta cheese had after ripening. Strain CA was significantly (P&lt;0.006) less tolerant than strain Scott A, of conditions in the cheese during storage at 4°C.

Synthesis, characterization, and adsorption properties of a Ce(III)-imprinted polymer supported by mesoporous SBA-15 matrix by a surface molecular imprinting technique

2014 ◽  
Vol 92 (3) ◽  
pp. 257-266 ◽  
Author(s):  
Yan Liu ◽  
Sujun Tian ◽  
Xiangguo Meng ◽  
Xiaohui Dai ◽  
Zhanchao Liu ◽  
...  
Keyword(s):  
Molecular Imprinting ◽  
Metal Ion ◽  
Ph Value ◽  
Matrix Material ◽  
Infrared Spectrometry ◽  
Batch Adsorption ◽  
Order Kinetic ◽  
Imprinted Polymer ◽  
Surface Molecular Imprinting ◽  
Ion Imprinted

A new Ce(III) ion imprinted polymer (Ce(III)-IIP), which can be used for selective removal of Ce(III) from aqueous solutions, was successfully prepared based on the matrix material of ordered mesoporous silica SBA-15 by surface molecular imprinting technology. The prepared polymer was characterized by X-ray diffraction, transmission electron microscopy, Fourier transmission infrared spectrometry, and nitrogen adsorption−desorption isotherm. The results showed that Ce(III)-IIP kept a uniform framework mesoporosity of SBA-15 but a decrease in Brunauer−Emmett−Teller surface area, pore volume, and average pore diameter. Batch adsorption tests were researched on the effects of solution pH value, mass of sorbent, and contact time at different initial Ce(III) concentrations and temperatures. The kinetic data well fitted the pseudo-second-order kinetic model compared with the pseudo-first-order model. The adsorption isotherm fitted Langmuir model and the dimensionless separation factor RL indicated favorable adsorption. In addition, the Gibbs free energy (ΔG0), entropy (ΔS0), and enthalpy (ΔH0) were calculated from the adsorption data. These values suggested that the adsorption of Ce(III) onto Ce(III)-IIP was a spontaneous and endothermic nature of the process. The relative selectivity coefficients for different metal ion were larger than that of the nonimprinted polymer, indicating that Ce(III)-IIP synthesized for Ce(III) had a higher selectivity specialism for this ion.

Repeatability and reproducibility of corneal biomechanical parameters derived from Corvis ST

2019 ◽  
Vol 30 (6) ◽  
pp. 1287-1294
Author(s):  
Nermin Serbecic ◽  
Sven Beutelspacher ◽  
Lovro Markovic ◽  
Abhijit Sina Roy ◽  
Rohit Shetty
Keyword(s):  
Correlation Coefficient ◽  
Intraclass Correlation Coefficient ◽  
Coefficient Of Variation ◽  
Intraclass Correlation ◽  
Diurnal Changes ◽  
Good Reliability ◽  
Good Repeatability ◽  
Repeatability And Reproducibility ◽  
Biomechanical Parameters ◽  
High Intraclass Correlation Coefficient

Introduction: The aim of this study was to evaluate repeatability and reproducibility of newly calculated biomechanical parameters of the cornea, developed by our research group. Methods: One eye from each of the 23 healthy subjects was measured three times consecutively, three times at different daytimes and on three different days. The within-subject standard deviation and coefficient of variation, as well as the intraclass correlation coefficient, were calculated for every parameter in each group. Results: Excellent repeatability and reproducibility (coefficient of variation < 5%, intraclass correlation coefficient > 0.75) was found for corrected values measured at A1, HC, and A2 time points (2nd A2 Time, 2nd A1 Time, 2nd HC Time, 2nd HC Def Amp and 2nd A1 Def Amp). Corneal-specific stiffness parameters, which showed good repeatability and reliability, were DA_cor (coefficient of variation = 4.02%, intraclass correlation coefficient = 0.919), KcLinear (coefficient of variation = 4.03%, intraclass correlation coefficient = 0.895), areaForceCornea (coefficient of variation = 3.34%, intraclass correlation coefficient = 0.853) and E2 (coefficient of variation = 4.1%, intraclass correlation coefficient = 0.78). Overall, most parameters fell into the category of good reliability (high intraclass correlation coefficient) and poor reproducibility (low coefficient of variation), including all the parameters describing extraocular deformation (DA_ext, AEPvED, AUC EDef, areaForceExtra, Kg and μg). Comparing the coefficient of variation values for intrasession, intersession and daytime measurements, there were no indices for diurnal changes. Conclusion: Most parameters showed good repeatability and reliability. The extraocular stiffness parameters showed poor reproducibility. KcLinear can serve as a very reliable and repeatable indicator of corneal stiffness.

Analysis of the Rate Constant for Hydration Kinetics of the Cement and Ash Fly in the Solidified Residues System Based on the Measurement of Ca(OH)2

2013 ◽  
Vol 380-384 ◽  
pp. 4395-4399
Author(s):  
Qin Li ◽  
Xiao Jun Zhou ◽  
Ke Wei Sun
Keyword(s):  
Chemical Analysis ◽  
Rate Constant ◽  
Matrix Material ◽  
Order Reaction ◽  
First Order Reaction ◽  
Cement Matrix ◽  
Analysis Method ◽  
Hydration Kinetics ◽  
First Order ◽  
Kinetics Of

Based on the hydration kinetics of the cement matrix material, the paper presents a chemical analysis method by means of analyzing the contents of Ca(OH)2 in cement matrix material. The kinetics constant for the cement, ash fly in the residues system solidified by recycled cement, ash fly was determined at different temperature. The hydration kinetics characteristic of the residues system after being hydrated 7 days is first order reaction.

scholarly journals Almond diversity and homozygosity define structure, kinship, inbreeding, and linkage disequilibrium in cultivated germplasm, and reveal genomic associations with nut and seed weight

2021 ◽  
Vol 8 (1) ◽  
Author(s):  
Stefano Pavan ◽  
Chiara Delvento ◽  
Rosa Mazzeo ◽  
Francesca Ricciardi ◽  
Pasquale Losciale ◽  
...  
Keyword(s):  
Linkage Disequilibrium ◽  
Seed Weight ◽  
Genome Wide Association Study ◽  
Agricultural Research ◽  
National Research Council ◽  
Ex Situ ◽  
Gene Pools ◽  
Crop Species ◽  
A Genome ◽  
Major Interest

AbstractAlmond [Prunus dulcis Miller (D.A. Webb)] is the main tree nut species worldwide. Here, genotyping-by-sequencing (GBS) was applied to 149 almond cultivars from the ex situ collections of the Italian Council for Agricultural Research (CREA) and the Spanish National Research Council (CSIC), leading to the detection of 93,119 single-nucleotide polymorphisms (SNPs). The study of population structure outlined four distinct genetic groups and highlighted diversification between the Mediterranean and Californian gene pools. Data on SNP diversity and runs of homozygosity (ROHs) allowed the definition of kinship, inbreeding, and linkage disequilibrium (LD) decay in almond cultivated germplasm. Four-year phenotypic observations, gathered on 98 cultivars of the CREA collection, were used to perform a genome-wide association study (GWAS) and, for the first time in a crop species, homozygosity mapping (HM), resulting in the identification of genomic associations with nut, shell, and seed weight. Both GWAS and HM suggested that loci controlling nut and seed weight are mostly independent. Overall, this study provides insights on the almond cultivation history and delivers information of major interest for almond genetics and breeding. In a broader perspective, our results encourage the use of ROHs in crop science to estimate inbreeding, choose parental combinations minimizing the risk of inbreeding depression, and identify genomic footprints of selection for specific traits.

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