Effects Of Various Types Research Articles

Experimental Genetic and Breeding Research at the MSU Botanical Garden from the Second Third of the 20th Century to the Early 21st Century

From with the second third of the 20th century, studies in experimental morphogenesis, hybridization and breeding become one of the main strands in the research carried out at the MSU Botanical Garden. The article reviews the history of the development of these studies at the BG from the said period to the early 21st century in the context of changes in the BG’s institutional status. It shows the role of L. P. Breslavets-Krestovnikova, cytologist and cytogeneticist, N. A. Bazilevskaya, N. I. Vavilov’s pupil and organizing director of the territory of the MSU Botanical Garden on Lenin Hills (Vorobyovy Gory), and A. A. Sosnovets, ornamental plant breeder and cytogeneticist, in organizing and conducting practice-oriented studies of the effects of various types of radiation and chemical mutagens in different species of economically important and ornamental plants.

Minimally Invasive Cytopathology and Accurate Diagnosis: Technical Procedures and Ancillary Techniques.

In recent years, the demand for cytopathological accurate diagnoses has increased as expanding minimally invasive procedures obtain materials from patients with advanced cancer for diagnostic, prognostic, and predictive purposes. However, inadequate knowledge of cytopathological technical procedures and ancillary techniques by clinicians remains the most common reason for the limited availability of cytopathology. The objectives of this review were to understand the technical procedures, ancillary techniques, and application and effectiveness of various types of tests in cytopathology. Each of the many ancillary technologies described in the literature has specific advantages and limitations and laboratories select one or more methods depending on their infrastructure and expertise to achieve the goal from initial screening of the disease to the final diagnosis of the cytopathology. This paper systematically reviews the development of cytopathology, summarizes the existing problems in cytopathology and the new progress of auxiliary examination, to provide a theoretical basis for the advanced development of cytopathological diagnostic technologies and to consolidate the minimally invasive and accurate diagnosis of cytopathologies for clinicians. Cytopathology offers many advantages over other clinical examinations, particularly for minimally invasive and accurate diagnosis.

Model Estimate of the Acidity of Atmospheric Precipitation Acidity Due to Anthropogenic Sulfur Compounds in the 20th Century

An analysis of the acidity of precipitation is carried out by using the ChAP-1.0 (Chemistry and Aerosol Processes) atmospheric sulfur cycle scheme developed for Earth System Models of Intermediate Complexity (EMICs)These calculations are forced by monthly mean anthropogenic emissions of sulfur dioxide to the atmosphere in 1850–2000 adapted from the CMIP5 (Coupled Models Intercomparison Project, phase 5) database and by long-term means (taking into account annual variations) of meteorological variables adapted from the ERA-Interim reanalysis for 1979–2015. It was revealed that significant acidity of precipitation (minimum pH of hydrometeors) is typical for regions with high anthropogenic loading of sulfur compounds in atmosphere – Europe, southeast Asia, east North America, southern Africa, and western South America. In these regions in the last decades of the 20th century, typical precipitation values of pH amount from 2.5 to 3.5, which agrees well with the available measurements. The maximum acidity of precipitation (the minimum pH of hydrometeors, which is close to 2) due to anthropogenic sulfur are noted in the eastern Mediterranean region. Atmospheric transport leads to regions with pH 3.5 covering almost all of Eurasia in the last decades of the 20th century. The influence of this transport is also noticeable in other midlatitudinal regions – south of North America and western South America. In general, the ChAP scheme can be used in EMICs, but after a refinement to account for the effect of various types of precipitation on the wet deposition of sulfur compounds from the atmosphere and the effects of orography on the transport of chemical species in the atmosphere

EFFECT OF HORMONAL CONTRACEPTION ON DEPRESSION IN WOMEN.

Oral contraceptives are the most frequently chosen method of preventing pregnancy in Poland. Mood changes are one of the most common reasons why young women quit therapy. Depression is a severe disorder that affects millions of people around the world. Some long-term studies suggest an increased relative risk of antidepressant use during contraceptive use compared to non-users. Scientists note an increased risk of suicide as well. Other researchers suggest that there is insufficient evidence to support these findings. Some indicate strong correlation between most hormonal contraceptives and following usage of antidepressant drugs in female adolescents. There is still no consensus in the scientific community. Analyzes of many studies provide ambiguous information. Large-scale studies with properly selected test groups and particular therapies taken into consideration are required in order to accurately assess the risk of depression and mood disorders. In this article, we try to present different approaches to the subject of effects of various types of hormonal contraception methods on depression in women.

A mini-review: Potential of Phyllanthus niruri L as immunostimulators in fish aquaculture

Disease is the main factor causing crop failure in fish farming activities, which results in decreased production and of course is very detrimental economically for farmers. Therefore, it is necessary to control the disease with the right steps to avoid large losses. Preventive action is the right step, because it can be done as early as possible before the fish contract the disease, which of course costs less than treatment. One of the efforts to prevent disease is to increase the immune system of fish. Immunostimulants are compounds that can be used as an alternative therapy to increase the body's resistance to pathogen infections, because they can increase the work of the immune system through the activity of white blood cells and other phagocytic cells. Several research results have proven the effectiveness of various types of plants as immunostimulants, one of which is Phyllanthus niruri L. Several secondary metabolite compounds and filantin as specific compounds contained in P niruri, apart from having antibacterial and antioxidant effects, also function as immunostimulants. So the purpose of this article is to explain the potential of P. niruri L. as an immunostimulant in cultivated fish which can increase the body's resistance to disease. Based on the above studies, P. niruri L. can increase non-specific and specific fish body resistance, so it has the potential to be used as an alternative immunostimulant that can prevent several types of cultivated fish such as Oreochromis mossambicus and Cyprinus carpio L. fish from attack by pathogenic bacteria, including Aeromonas hydrophila.

Effect of Various Types of Face Masks on Oxygen Saturation, Heart Rate & Respiratory Rate in Health Care Workers of Tertiary Teaching Hospital, Raipur (C.G.)

Background: Healthcare workers are at a higher risk of having Covid infection than other professionals. Thus, it is more important for them to wear face masks for themselves and for the sake of their co-workers and public health. The use of face masks is mainly limited by their perceived discomfort and concerns regarding inadequate gas exchange. Still, there are serious concerns about the use of masks over a long period. Aims: This study aimed to study the effects of different types of face masks on clinical parameters like oxygen saturation, Respiratory rate, and pulse rate. Methods: A cross-sectional observational study was conducted on 218 subjects from March 2021 to April 2021. They used different types of masks-like cloth masks, surgical masks, N95 masks, and double masks. A pulse oximeter applied to the index finger was used for the non-invasive determination of clinical parameters like oxygen saturation, heart rate, and respiratory rate. Results: There was a significant decrease in oxygen saturation seen in subjects using the surgical mask and N-95 mask, but there was no change in oxygen saturation in participants who wore cloth masks. In our study, heart rates increased significantly at the end of the study in all groups irrespective of the mask they wore. However, the respiratory rate increased significantly only in those participants who wore N-95 masks. Results: There was a significant decrease in oxygen saturation seen in subjects using the surgical mask and N-95 mask, but there was no change in oxygen saturation in participants who wore cloth masks. In our study, heart rates increased significantly at the end of the study in all groups irrespective of the mask they wore. However, the respiratory rate increased significantly only in those participants who wore N-95 masks. Conclusion: Our study concludes that wearing a face mask for a long period induces an increase in heart rate and shortness of breath along with a significant reduction in oxygen saturation.

Virtual screening of drugs targeting PD-L1 protein

Monoclonal antibody inhibitors targeting PD-1/PD-L1 immune checkpoints are gradually entering the market and have achieved certain positive effects in the treatments of various types of tumors. However, with the expansion of application, the limitations of antibody drugs and problems such as excessive homogenization of research gradually appear, making small-molecule inhibitors the new focus of researchers. This study aims to use ligand-based and structure-based binding activity prediction methods to achieve virtual screening of small-molecule inhibitors targeting PD-L1, thereby helping to accelerate the development of small molecule drugs. A dataset of PD-L1 small-molecule inhibitory activity from relevant research literature and patents is collected and activity judgment classification models with intensity prediction regression models are constructed based on different molecular featurization methods and machine learning algorithms. The two types of models filter 68 candidate compounds with high PD-L1 inhibitory activity from a large drug-like small molecule screening pool (ZINC15). Ten of these compounds not only have good drug similarities and pharmacokinetics, but also exhibit comparable binding affinities and similar mechanisms of action with previous reported hotspot compounds in molecular docking. This phenomenon is further verified in subsequent molecular dynamics simulation and the estimation of binding free energy. In this study, a virtual screening workflow integrating ligand-based method and structure-based method is developed, and potential PD-L1 small-molecule inhibitors are effectively screened from large compound databases, which is expected to help accelerate the application and expansion of tumor immunotherapy.

Melatonin Can Enhance the Effect of Drugs Used in the Treatment of Leukemia

Melatonin (N-acetyl-5-methoxytryptamine, MEL), secreted by the pineal gland, plays an important role in regulation of various functions in the human body. There is evidence that MEL exhibits antitumor effect in various types of cancer. We studied the combined effect of MEL and drugs from different pharmacological groups, such as cytarabine (CYT) and navitoclax (ABT-737), on the state of the pool of acute myeloid leukemia (AML) tumor cell using the MV4-11 cell line as model. The combined action of MEL with CYT or ABT-737 contributed to the decrease in proliferative activity of leukemic cells, decrease in the membrane potential of mitochondria, and increase in the production of reactive oxygen species (ROS) and cytosolic Ca2+. We have shown that introduction of MEL together with CYT or ABT-737 increases expression of the C/EBP homologous protein (CHOP) and the autophagy marker LC3A/B and decreases expression of the protein disulfide isomerase (PDI) and binding immunoglobulin protein (BIP), and, therefore, could modulate endoplasmic reticulum (ER) stress and initiate autophagy. The findings support an early suggestion that MEL is able to provide benefits for cancer treatment and be considered as an adjunct to the drugs used in cancer therapy.

PENGARUH BERBAGAI JENIS MULSA TERHADAP PERTUMBUHAN DAN HASIL KEMBANG KOL (Brassica oleracea var. Botrytis L) VARIETAS PM 126 F1

This study aims to determine the effect of various types of mulch on the growth and yield of cauliflower varieties PM 126 F1. To determine the effectiveness of various mulches compared to MPHP on the growth and yield of cauliflower varieties PM 126 F1. This research was conducted in the experimental field of the Faculty of Agriculture, Samudra University, Langsa City, Aceh Province with an altitude of ± 10 meters above sea level. This research was conducted from January to March 2022. This study was structured using a non-factorial randomized block design (RAK). The factors observed were several types of mulch, consisting of 13 mulch with 1 cauliflower variety PM 126 F1 which was repeated 3 times. Parameters observed included plant height, number of leaves, weight of plant stover, flower diameter, weight of plant flowers and production per hectare. The results showed that the type of mulch treatment significantly affected the parameters of plant height at 20 HST, number of leaves aged 20 HST and plant weight of wet stover at harvest. However, it did not significantly affect the parameters of flower diameter and plant flower weight and production per hectare at harvest. The best results were obtained by treatment M6 (empty palm oil bunches), M1 (MPHP), but equally good with M10 (broken bricks) and M11 (used cloth). To cultivate cauliflower plants it is recommended to use mulch of empty palm oil bunches, MPHP, broken bricks or used cloth

PENGARUH BEBAGAI JENIS BIOCHAR DAN PUPUK NPK TERHADAP KAPASITAS TUKAR KATION (KTK) TANAH ULTISOL PADA BUDIDAYA JAGUNG MANIS (Zea mays saccharata L.)

The aim of this study was to determine the effect of various types of biochar and NPK fertilizer on growth, production of sweet corn (Zea mays saccharata L.) and cation exchange capacity (CEC) in ultisols. This study used a randomized block design (RBD) with 2 factors. The first factor was the type of biochar consisting of 3 levels, namely: B1 = sekampadi biochar (96 g/polybag), B2 = corn cob biochar (96 g/polybag), B3 = coconut shell biochar (96 g/polybag). The second factor was NPK fertilizer consisting of 3 levels, namely: P0 = 0 g/polybag (control), P1= 2 g/polybag, P2= 4 g/polybag. The results showed that the type of biochar had a significant effect on plant height4 MST and root dry weight but had no significant effect on leaf number, flowering age, cob length, non-sticky crop production, sweetness index and cation exchange capacity (CEC). NPK fertilizer treatment significantly affected plant height Leaf number and sweetness index but had no significant effect on flowering age, cob length, non-sticky production per plant, root dry weight and exchange capacity (CEC). The interaction of various types of biochar and NPK fertilizer had no significant effect on plant height, number of leaves, flowering age, cob length, non-sticky production per plant, cob weight per plot, sweetness index, root dry weight and cation exchange capacity (CEC).

다양한 유형의 지리적 거리가 중국진출 다국적기업 자회사의 CSR 활동에 미치는 영향

다양한 유형의 지리적 거리가 중국진출 다국적기업 자회사의 CSR 활동에 미치는 영향

Effect of leisure activities on cognitive aging in older adults: A systematic review and meta-analysis.

Abnormal cognitive aging in older adults is a growing public health problem. Previous studies showed inconsistent results pertaining to the effects of leisure activities on cognitive function in older adults. We conducted a systematic review and meta-analysis of published observational longitudinal studies to examine and synthesize the effects of leisure activities on cognitive function in older adults. MEDLINE, PubMed, EMBASE, PsycINFO (Ovid), CINAHL (EBSCO), and Web of Science databases were searched from January 2012 to January 2022. Relative risks (RRs) with 95% confidence intervals (CIs) were pooled using random-effects meta-analysis. Most studies found that leisure activities had a positive effect on cognitive function in older adults. The pooled RR for the effect of leisure activity on cognitive function was 0.77 (95% CI: 0.72-0.81, p < 0.01). The effects of leisure activities on cognitive function varied by different cognitive statuses in older adults, with RRs ranging from 0.55 (95% CI: 0.37-0.83) to 1.07 (95% CI: 0.95-1.22). Meta-regression analysis showed that compared with studies with percentage of female ≥50%, studies with female participant percentage <50% had significantly increased RR (p = 0.01). Moreover, studies conducted in European and American countries had significantly lower RR (p = 0.019), compared with those conducted in Asian countries. Our study revealed different effects of various types of leisure activities on different cognitive statuses in older adults. To make innovative recommendations for promoting cognitive function in older adults, more detailed observational longitudinal studies investigating the effects of different types of leisure activities on different cognitive statuses in older adults are needed.

Self-care Practices of Patients With Heart Failure Using Wearable Electronic Devices: A Systematic Review.

Heart failure (HF) is the fastest growing cardiovascular condition globally; associated management costs and hospitalizations place an immense burden on healthcare systems. Wearable electronic devices (WEDs) may be useful tools to enhance HF management and mitigate negative health outcomes. We aimed to perform a systematic review to examine the potential of WEDs to support HF self-care in ambulatory patients at home. Five databases were searched for studies published between 2007 and May 2022, including OVID MEDLINE, EMBASE (OVID), APA PsycINFO (OVID), Cochrane Central Register of Controlled Trials (OVID), and CINAHL Plus with Full Text (Ebsco). After 6210 duplicates were removed, 4045 records were screened and 6 were included for review (2 conference abstracts and 4 full-text citations). All studies used WEDs as 1 component of a larger intervention. Outcome measures included quality of life, physical activity, self-efficacy, self-care, functional status, time to readmission, social isolation, and mood. Studies were of moderate to high quality and mixed findings were reported. Enhanced exercise habits and motivational behavior to exercise, as well as decreased adverse symptoms of fatigue and dyspnea, were identified in 2 studies. However, improvements in exercise capacity and increased motivational behavior did not lead to exercise adherence in another 2 studies. The findings from this review suggest that WEDs may be a viable health behavior improvement strategy for patients with HF. However, studies of higher quality, with the primary intervention being a WED, and consistent outcome measures are needed to replicate the positive findings of studies identified in this review.

Theoretical estimate of the operating effectiveness of the battery-powered suspended monorail mining locomotives

Research objective is to develop a mathematical model for a theoretical estimate of the operating effectiveness of the battery-powered suspended monorail mining locomotives. Research relevance. Comparison of the functional capabilities of cargo and personnel mine carriers shows that only suspended monorail tracks can provide cost-effective transportation along alternating curved track profiles of mine workings with inclination angles up to 30º. Battery-powered suspended monorail locomotives are currently more common. Theoretical estimate of battery-powered monorail locomotives operating effectiveness is therefore of great relevance. Methods of research. The technical details of suspended monorail mining locomotives were analyzed when solving the assigned problem. The paper uses the methods of mathematical analysis based on differential calculus to construct a universal equation for determining the operational efficiency of battery-powered suspended monorail mining locomotives. Results. In order to theoretically evaluate the operating effectiveness of battery-powered monorail locomotives, a mathematical model has been developed that makes it possible to determine a comprehensive indicator for estimating the battery traction effectiveness and the operational efficiency. It has been established that the operational efficiency of a battery-powered locomotive is generally determined both by economic features of all links of its traction electric circuit and their operation modes. It has to be considered that the operating modes of traction devices and accessories are entirely determined by the traction mode of the battery-powered locomotive entirely and partly determined by the electrochemical characteristics of the battery. After finding the operating efficiency, it is possible to provide recommendations for battery-powered suspended locomotives operating effectiveness improvement. Scope of the results. The obtained results are recommended to be used when estimating the operating effectiveness of battery-operated suspended monorail locomotives, as well as when comparing the effectiveness of various types of traction of support service mining vehicles.

EFFECT OF VARIOUS INGREDIENTS ON THE PHYSICO CHEMICAL PROPERTIES OF ICE CREAM

&#x0D; &#x0D; &#x0D; Ice cream is a dairy product prepared with the addition of various types of ingredients to make desirable quality liked by consumers of various ages. Ice cream industry at Pakistan is also concerned with preparation of new flavour. Therefore, the aim of this research was to evaluate the effect of various types of ingredients on the physicochemical properties of ice cream. The complete this study, randomized design was used. The three types of milk cow milk, buffalo milk and skimmed milk were used with the addition of table sugar and aspartame as sweetener whereas, the vegetable ghee and fresh milk cream were used to improve the quality of ice cream.The result observed shown statistically significant difference (P&lt; 0.05) in each sampleforoBrix, ash %, fat %, protein %, sucrose%and carbohydrate content respectively. Ice cream prepared with buffalo milk observed with higher Tss (oBrix) of 18.7% pH 6.71, ash% 0.81, total fat9.03%, protein8.34%, sucrose11.18% and total carbohydrate29.7% were recorded in ice cream samples.Whereas, ice cream prepared with cow milk observed low in Tssfat, protein, sucroseand total carbohydrate while the ice cream prepared with skimmed milk power result in lower Tss of 15.92 less ash content0.5 very low quantity of fat1.75% protein 3.32% sucrose 7.87% and carbohydrates 20.93%. Therefore, it is concluded from this study that ice cream prepared with buffalo milk and cow milk is highly nutritious and appealing to the consumer.&#x0D; &#x0D; &#x0D;

A Content Analysis of Self-Reported Financial Relationships in Biomedical Research

Introduction Financial conflicts of interest (fCOI) present well documented risks to the integrity of biomedical research. However, few studies differentiate among fCOI types in their analyses, and those that do tend to use preexisting taxonomies for fCOI identification. Research on fCOI would benefit from an empirically-derived taxonomy of self-reported fCOI and data on fCOI type and payor prevalence. Methods We conducted a content analysis of 6,165 individual self-reported relationships from COI statements distributed across 378 articles indexed with PubMed. Two coders used an iterative coding process to identify and classify individual fCOI types and payors. Inter-rater reliability was κ = 0.935 for fCOI type and κ = 0.884 for payor identification. Results Our analysis identified 21 fCOI types, 9 of which occurred at prevalences greater than 1%. These included research funding (24.8%), speaking fees (20.8%), consulting fees (18.8%), advisory relationships (11%), industry employment (7.6%), unspecified fees (4.8%), travel fees (3.2%), stock holdings (3.1%), and patent ownership (1%). Reported fCOI were held with 1,077 unique payors, 22 of which were present in more than 1% of financial relationships. The ten most common payors included Pfizer (4%), Novartis (3.9%), MSD (3.8%), Bristol Myers Squibb (3.2%), AstraZeneca (3.1%), GSK (3%), Boehringer Ingelheim (2.9%), Roche (2.8%), Eli LIlly (2.5%), and AbbVie (2.4%). Conclusions These results provide novel multi-domain prevalence data on self-reported fCOI and payors in biomedical research. As such, they have the potential to catalyze future research that can assess the differential effects of various types of fCOI. Specifically, the data suggest that comparative analyses of the effects of different fCOI types are needed and that special attention should be paid to the diversity of payor types for research relationships.

Creatine modulates cellular energy metabolism and protects against cancer cachexia-associated muscle wasting.

Cancer cachexia is a multifactorial syndrome defined by progressive loss of body weight with specific depletion of skeletal muscle and adipose tissue. Since there are no FDA-approved drugs that are available, nutritional intervention is recommended as a supporting therapy. Creatine supplementation has an ergogenic effect in various types of sports training, but the regulatory effects of creatine supplementation in cancer cachexia remain unknown. In this study, we investigated the impact of creatine supplementation on cachectic weight loss and muscle loss protection in a tumor-bearing cachectic mouse model, and the underlying molecular mechanism of body weight protection was further assessed. We observed decreased serum creatine levels in patients with cancer cachexia, and the creatine content in skeletal muscle was also significantly decreased in cachectic skeletal muscle in the C26 tumor-bearing mouse model. Creatine supplementation protected against cancer cachexia-associated body weight loss and muscle wasting and induced greater improvements in grip strength. Mechanistically, creatine treatment altered the dysfunction and morphological abnormalities of mitochondria, thus protecting against cachectic muscle wasting by inhibiting the abnormal overactivation of the ubiquitin proteasome system (UPS) and autophagic lysosomal system (ALS). In addition, electron microscopy revealed that creatine supplementation alleviated the observed increase in the percentage of damaged mitochondria in C26 mice, indicating that nutritional intervention with creatine supplementation effectively counteracts mitochondrial dysfunction to mitigate muscle loss in cancer cachexia. These results uncover a previously uncharacterized role for creatine in cachectic muscle wasting by modulating cellular energy metabolism to reduce the level of muscle cell atrophy.

Bearing fault diagnosis model using improved Bayesian information criterion-based variational modal decomposition and IGA-SVM

In rotating machinery, the bearing vibration signal is easily covered by the vibration signal of other components, which makes the fault characteristic signal not obvious in the collected vibration signal. In order to better separate the vibration source from the collected vibration signal, a variational modal decomposition optimized by bayesian information criterion (VMDBIC) is proposed. At the same time, the data set is constructed based on the separated vibration source signals, and the support vector machine (SVM) optimized by improved genetic algorithm (IGA) is used to diagnose the bearing fault. Firstly, the Bayesian information criterion is used to calculate the number of potential vibration sources in the vibration signal. The calculated number of vibration sources is used as the number of modal components of variational modal decomposition (VMD) to decompose vibration signal. Secondly, the modal components obtained by VMD are used to construct the eigenmatrix of vibration signal. And the singular value energy spectrum of 3 bearing types (a total of 24 fault types) is calculated based on the eigenmatrix of vibration signal. Finally, the singular value energy spectrum is used as the input of IGA-SVM model to diagnose the bearing fault. The effectiveness of VMDBIC method is verified from three aspects of the time-frequency domain signal, the index of orthogonality (IO), and the index of energy conservation (IEC). The feasibility of the method proposed in this paper is verified from three aspects: fault identification effect of various types of bearings, load changes, and mutual diagnosis of different bearings.

Efektivitas Ekstrak Tumbuhan Rawa sebagai Biopestisida Plutella xylostella dalam Skala Laboratorium

Cabbage caterpillars can attack all stages of plant growth in the vegetative and generative phases. In the concept of integrated pest control, the use of chemical insecticides is the last alternative, so an environmentally friendly control technology is needed. Swampland has the potential of plants that can be extracted as active ingredients for pest control. The results of the literature study showed that there were several types of potential wetland plants that contained the active ingredient of hydrocarbon derivative compounds which were effective in controlling Plutella, but of the 13 types of plants, a study was conducted on their effectiveness in controlling Pluttela xylostella larvae is very necessary. The purpose of this study was to determine the effectiveness of various types of wetland plants as effective botanical insecticides in controlling Pluttela xylostella on a laboratory scale. The results showed that there were 13 types of swamp plants that could be effective botanical insecticides in controlling Pluttela xylostella. The mortality of Pluttela xylostella larvae at 48 hours of observation was high in the treatment of plant extracts of Piper sarmentosum, Tithonia diversifolia, and Ziziphus spina-christi with a percentage of 68%. Therefore, it is necessary to conserve these wild plants so that these plants do not become extinct.

A Review on Computational Fluid Dynamics Simulations of Industrial Amine Absorber Columns for CO2 Capture

AbstractCO2 emission is an important environmental issue leading to global climate change, notably an increase in global temperatures; therefore, it is so imperative to reduce CO2 emissions to the atmosphere. Absorption columns using amine‐based solutions are a promising approach for CO2 removal from industrial gas streams. Many modeling and simulation research have been performed on CO2 absorption columns in which computational fluid dynamics (CFD) strategy is very appropriate and well‐known. As CFD modeling and simulation is a fast‐developing method, the most recent review papers do not include the core research in this field of study. In this study, numerical simulations of CO2 absorption columns using CFD strategy have been carried out applying various types of amine‐based solutions. Furthermore, the effect of various types of packing mesh generation on the absorption columns' efficiency was studied. Investigation of synergetic influence such as application of various nanoparticles in different amine‐based solutionsand activators, double diameter packed bed absorption columns with different packings, rotating packed columns with double diameter are proposed for future studies.