scholarly journals Petrophysical Correlations for the Permeability of Coquinas (Carbonate Rocks)

2020 ◽  
Vol 135 (2) ◽  
pp. 287-308
Author(s):  
M. C. O. Lima ◽  
E. M. Pontedeiro ◽  
M. Ramirez ◽  
A. Boyd ◽  
M. Th. van Genuchten ◽  
...  
Keyword(s):  
Pore Structure ◽  
Relaxation Times ◽  
Porous System ◽  
Pore Scale ◽  
Network Modelling ◽  
Flow Simulations ◽  
Pore Network Modelling ◽  
Different Types ◽  
Carbonate Formations

Abstract The pore structure of many carbonate formations is known to be very complex and heterogeneous. Heterogeneity is manifested by the presence of different types, sizes, and shapes of pores resulting from sedimentation and diagenetic actions. These complexities greatly increase uncertainties in estimated rock hydraulic properties in that different permeability values may occur for samples having similar porosities. In order to understand the effects of pore structure and heterogeneity, petrophysical analyses were performed on coquina samples from the Morro do Chaves Formation (Barremian, Sergipe-Alagoas Basin), which is an analogue of Brazilian Pre-salt oil reservoirs of Itapema Formation in the Santos Basin. Routine core analyses, and NMR and MICP measurements were carried out to obtain pore body and pore throat distributions. Obtained T2 relaxation times were converted to pore size radii by matching the NMR and MICP curves. Pore-scale imaging and pore network modelling were performed using microCT scans and the PoreFlow software, respectively. Calculated permeabilities using PoreFlow showed excellent agreement with the routine laboratory measurements. Samples having pore bodies with a higher coordination number showed much larger permeabilities at similar porosities. This study includes a statistical analysis of various features that caused the observed differences in permeability of the coquinas, including the role of connectivity of the entire porous system. Limitations and challenges of the various techniques, and the imaging and pore-scale flow simulations, are discussed.

scholarly journals 4D synchrotron microtomography and pore-network modelling for direct in situ capillary flow visualization in 3D printed microfluidic channels

Lab on a Chip ◽  
2020 ◽  
Vol 20 (13) ◽  
pp. 2403-2411
Author(s):  
Agnese Piovesan ◽  
Tim Van De Looverbosch ◽  
Pieter Verboven ◽  
Clement Achille ◽  
Cesar Parra Cabrera ◽  
...  
Keyword(s):  
Fluid Flow ◽  
Capillary Flow ◽  
Pore Network ◽  
Microfluidic Channels ◽  
Pore Scale ◽  
Network Modelling ◽  
Pore Network Modelling ◽  
3D Printed ◽  
Synchrotron Microtomography

We investigate fluid flow at the pore scale in novel 3D printed microfluidic channels through synchrotron microtomography and pore-network modelling.

scholarly journals Pore-by-Pore Modelling, Validation and Prediction of Waterflooding in Oil-Wet Rocks Using Dynamic Synchrotron Data

2021 ◽  
Author(s):  
Sajjad Foroughi ◽  
Branko Bijeljic ◽  
Martin J. Blunt
Keyword(s):  
Contact Angles ◽  
Pore Scale ◽  
Relative Permeabilities ◽  
Network Modelling ◽  
Time Resolved ◽  
High Resolution Image ◽  
Pore Network Modelling ◽  
Synchrotron Imaging ◽  
Capillary Pressures ◽  
Wet Rocks

AbstractWe predict waterflood displacement on a pore-by-pore basis using pore network modelling. The pore structure is captured by a high-resolution image. We then use an energy balance applied to images of the displacement to assign an average contact angle, and then modify the local pore-scale contact angles in the model about this mean to match the observed displacement sequence. Two waterflooding experiments on oil-wet rocks are analysed where the displacement sequence was imaged using time-resolved synchrotron imaging. In both cases the capillary pressure in the model matches the experimentally obtained values derived from the measured interfacial curvature. We then predict relative permeability for the full saturation range. Using the optimised contact angles distributed randomly in space has little effect on the predicted capillary pressures and relative permeabilities, indicating that spatial correlation in wettability is not significant in these oil-wet samples. The calibrated model can be used to predict properties outside the range of conditions considered in the experiment.

Potential Uses of Vinegar as a Medicine and Related in vivo Mechanisms

2016 ◽  
Vol 86 (3-4) ◽  
pp. 127-151 ◽  
Author(s):  
Zeshan Ali ◽  
Zhenbin Wang ◽  
Rai Muhammad Amir ◽  
Shoaib Younas ◽  
Asif Wali ◽  
...  
Keyword(s):  
Chemical Structure ◽  
Review Paper ◽  
Heart Diseases ◽  
Folk Medicine ◽  
Active Role ◽  
Current Review ◽  
Different Types ◽  
Positive Effect

While the use of vinegar to fi ght against infections and other crucial conditions dates back to Hippocrates, recent research has found that vinegar consumption has a positive effect on biomarkers for diabetes, cancer, and heart diseases. Different types of vinegar have been used in the world during different time periods. Vinegar is produced by a fermentation process. Foods with a high content of carbohydrates are a good source of vinegar. Review of the results of different studies performed on vinegar components reveals that the daily use of these components has a healthy impact on the physiological and chemical structure of the human body. During the era of Hippocrates, people used vinegar as a medicine to treat wounds, which means that vinegar is one of the ancient foods used as folk medicine. The purpose of the current review paper is to provide a detailed summary of the outcome of previous studies emphasizing the role of vinegar in treatment of different diseases both in acute and chronic conditions, its in vivo mechanism and the active role of different bacteria.

The Diagnosis of Lupus Anticoagulants by the Activated Partial Thromboplastin Time - The Central Role of Phosphatidyl Serine

1984 ◽  
Vol 52 (02) ◽  
pp. 172-175 ◽  
Author(s):  
P R Kelsey ◽  
K J Stevenson ◽  
L Poller
Keyword(s):  
Screening Method ◽  
Coagulation Factors ◽  
Phosphatidyl Serine ◽  
Test System ◽  
Specific Factor ◽  
Marginal Effect ◽  
Constant Composition ◽  
Lupus Anticoagulants ◽  
Different Types

SummaryLiposomes of pure phospholipids were used in a modified APTT test system and the role of phosphatidyl serine (PS) in determining the sensitivity of the test system to the presence of lupus anticoagulants was assessed. Six consecutive patients with lupus anticoagulants and seven haemophiliacs with anticoagulants directed at specific coagulation factors, were studied. Increasing the concentration of phospholipid in the test system markedly reduced the sensitivity to lupus anticoagulants but had marginal effect on the specific factor inhibitors. The same effect was achieved when the content of PS alone was increased in a vehicle liposome of constant composition.The results suggest that the lupus anticoagulants can best be detected by a screening method using an APTT test with a reagent of low PS content. The use of a reagent rich in PS will largely abolish the lupus anticoagulant’s effect on the APTT. An approach using the two different types of reagent may facilitate differentiation of lupus inhibitors from other types of anticoagulant.

The Role of Evaluative Tools in the Creation of the Memorial Media Portrait of Jacques Chirac (1932—2019)

2020 ◽  
pp. 97-110
Author(s):  
E. N. Mikhailova ◽  
V. A. Telegina
Keyword(s):  
Print Media ◽  
Political Elite ◽  
Systematic Analysis ◽  
Research Material ◽  
Political Orientations ◽  
Different Types ◽  
The Media ◽  
The Creation ◽  
Entire Text

The article is devoted to the study of evaluative tools used in modern French media in order to form the media image of a representative of the political elite. The techniques used in the creation of a memorial media portrait of Jacques Chirac (1932—2019), President of France from 1995 to 2007 are considered. The research material was the most prestigious French print media of various political orientations, published in late September — early October 2019 in connection with the death of the ex-President of the French Republic. The relevance of the research topic is dictated by the close attention of modern linguistics to axiological phenomena, differently presented in different types of discursive practices. The novelty of the study is due to the appeal to the analysis of the complex of evaluation tools used in the French print media when characterizing the former leader of the state during the nation’s farewell period. The estimated potential of the title of the article and its influence on the formation of the estimated vector of the entire text of the publication are shown. A systematic analysis of the assessment expression means, reflected in the memorial media portrait of the politician, is given. The factors that influenced the peculiarities of their use in this type of media portrait are revealed.

The influence of information relevance on the continued influence effect of misinformation

2020 ◽  
Author(s):  
Hua Jin ◽  
Lina Jia ◽  
Xiaojuan Yin ◽  
Shilin Wei ◽  
Guiping Xu
Keyword(s):  
Experimental Study ◽  
Questionnaire Survey ◽  
Personal Involvement ◽  
Influence Effect ◽  
Information Relevance ◽  
Different Types ◽  
Role Of Information

Misinformation often continues to influence people’s cognition even after corrected (the ‘continued influence effect of misinformation’, the CIEM). This study investigated the role of information relevance in the CIEM by questionnaire survey and experimental study. The results showed that information with higher relevance to the individuals had a larger CIEM, indicating a role of information relevance in the CIEM. Personal involvement might explain the effects of information relevance on the CIEM. This study provides insightful clues for reducing the CIEM in different types of misinformation and misinformation with varying relevance.

Classic and Novel Signaling Pathways Involved in Cancer: Targeting the NF-κB and Syk Signaling Pathways

2019 ◽  
Vol 14 (3) ◽  
pp. 219-225 ◽  
Author(s):  
Cong Tang ◽  
Guodong Zhu
Keyword(s):  
Cancer Therapy ◽  
Tyrosine Kinase ◽  
Signaling Pathways ◽  
Molecular Mechanisms ◽  
Therapeutic Potential ◽  
Cell Receptor ◽  
Transmembrane Receptors ◽  
Biological Responses ◽  
Different Types

The nuclear factor kappa B (NF-κB) consists of a family of transcription factors involved in the regulation of a wide variety of biological responses. Growing evidence support that NF-κB plays a major role in oncogenesis as well as its well-known function in the regulation of immune responses and inflammation. Therefore, we made a review of the diverse molecular mechanisms by which the NF-κB pathway is constitutively activated in different types of human cancers and the potential role of various oncogenic genes regulated by this transcription factor in cancer development and progression. We also discussed various pharmacological approaches employed to target the deregulated NF-κB signaling pathway and their possible therapeutic potential in cancer therapy. Moreover, Syk (Spleen tyrosine kinase), non-receptor tyrosine kinase which mediates signal transduction downstream of a variety of transmembrane receptors including classical immune-receptors like the B-cell receptor (BCR), which can also activate the inflammasome and NF-κB-mediated transcription of chemokines and cytokines in the presence of pathogens would be discussed as well. The highlight of this review article is to summarize the classic and novel signaling pathways involved in NF-κB and Syk signaling and then raise some possibilities for cancer therapy.

Role of Panchakarma in management of Gridhrasi

2016 ◽  
Vol 1 (2) ◽  
Author(s):  
Imlikumba . ◽  
Parappagoudra Mahesh ◽  
BA Lohith ◽  
K Singha ◽  
S Lalravi
Keyword(s):  
Modern Science ◽  
Stressful Life ◽  
Low Back ◽  
Lateral Aspect ◽  
Effective Measure ◽  
Main Complaint ◽  
Different Types ◽  
Back Ache ◽  
Different Dimensions

Panchakarma is a fruitful measure and its extensive efficacies are classified in different dimensions to cure different types of complicated diseases. Vamana, Virechana, Niruha, Anuvasana and Nasya are the five procedures and subsequently even Vamana, Virechana, Basti, Nasya and Rakta Mokshana are broadly termed as Panchakarma in day to day practices.The new diseases are evolving with intense gravity and therefore to combat those, Panchakarma is a very effective measure. In present era competition and advancement have led to hectic and stressful life, man has eventually forgotten the absolute enjoyment and solitary affection of nature and as a result is facing many health problems. Gridhrasi is no exception, it is correlated to sciatica in modern science where low back ache radiating to toes in the lateral aspect of the thigh associated with stiffness is the main complaint.

RURAL TOURISM IN INDIA CHALLENGES AND OPPORTUNITIES

2018 ◽  
Vol 6 (26) ◽  
Author(s):  
Pankaj Sharma ◽  
Ravi Parkash
Keyword(s):  
Private Sector ◽  
Rural Areas ◽  
Economic Condition ◽  
Rural Tourism ◽  
Rural Location ◽  
Different Types ◽  
Challenges And Opportunities ◽  
Political Background ◽  
The Government

The paper analyze the role of rural tourism for the development of rural areas, The study analyzed how the different types of tourist product diversifications influence the development possibilities of studied rural areas in India. The government should sponsor private Sector to promote tourism in rural areas. For upgrading the rural tourism government requires to understand the rural location, demography, socio-culture, financial and political background of that area. How we can involve the rural citizens to improve their socio-economic condition. The objective of this paper is to present an update on rural tourism expansion and development in India. Rural tourism is rising in terms of number of visitors and the government of India should focus on it as an engine of growth

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