Screening of Biosurfactant Producing Bacteria Isolated from Hydrocarbon Contaminated Site and Their Potential in Biosorption of Pb(II) and Oil Biodegradation

2021 ◽  
Vol 58 (6) ◽  
pp. 435-441
Author(s):  
Swati Rastogi ◽  
Sheel Ratna ◽  
Rajesh Kumar
Keyword(s):  
High Efficiency ◽  
Pearson Correlation ◽  
Correlation Method ◽  
Contaminated Site ◽  
Screening Methods ◽  
Motor Oil ◽  
Bacterial Strains ◽  
Biosorption Process ◽  
Used Motor Oil ◽  
Haemolytic Assay

Abstract In the present study, three potentially Pb(II)-resistant and biosurfactant-producing bacterial strains were isolated from a total of 23 strains using various screening methods, investigated for their biosorption of Pb(II) and used for the biodegradation of used motor oil. The results show that strain E1 (Bacillus haynesii) has significantly high efficiency in biodegradation of used motor oil, up to 82 % in the first three days. Maximum Pb(II) biosorption capacities of 238.09 mg/g and 99.01 mg/g were determined for strains E1 and F5 (Pseudomonas aeruginosa), respectively. The biosorption process was found to be in good agreement with the Langmuir isotherm for both E1 (R2 = 0.9614) and F5 (R2 = 0.9646), suggesting monolayer biosorption. The four common screening methods, namely the haemolytic assay, the determination of surface tension, the emulsifying activity and the foam test, were also correlated with the Pearson correlation method.

scholarly journals Isolation and Characterization of Biosurfactant-producing Alcaligenes sp. YLA11 and its Diesel Degradation Potentials

2021 ◽  
Vol 9 (2) ◽  
pp. 7-12
Author(s):  
Abdulrahman Abdulhamid Arabo ◽  
Raji Arabi Bamanga ◽  
Mujiburrahman Fadilu ◽  
Musa Abubakar ◽  
Fatima Abdullahi Shehu ◽  
...  
Keyword(s):  
Carbon Source ◽  
Incubation Time ◽  
Sole Carbon Source ◽  
Enrichment Culture ◽  
Diesel Oil ◽  
Contaminated Site ◽  
Screening Methods ◽  
Bacterial Strains ◽  
Isolation And Characterization ◽  
Degrading Bacteria

This study aimed to isolate and identify biosurfactant producing and diesel alkanes degrading bacteria. For this reason, bacteria isolated from the diesel contaminated site were screened for their potential to produce biosurfactants and degrade diesel alkanes. Primary selection of diesel degraders was carried out by using conventional enrichment culture technique where 12 bacterial strains were isolated based on their ability to grow on minimal media supplemented with diesel as sole carbon source, which was followed by qualitative screening methods for potential biosurfactant production. Isolate B11 was the only candidate that shows positive signs for drop collapse, foaming, haemolytic test, oil displacement of more than 22 ± 0.05 mm, and emulsification (E24) of 14 ± 0.30%. The effect of various culture parameters (incubation time, diesel concentration, nitrogen source, pH and temperature) on biodegradation of diesel was evaluated. The optimum incubation time was confirmed to be 120 days for isolates B11, the optimum PH was confirmed as 8.0 for the isolate, Similarly, the optimum temperature was confirmed as 35oC. In addition, diesel oil was used as the sole carbon source for the isolates. The favourable diesel concentration was 12.5 % (v/v) for the isolate. The isolate has shown degradative ability towards Tridecane (C13), dodecane, 2, 6, 10-trimethyl- (C15), Tetradecane (C14), 2,6,10-Trimethyltridecane (C16), Pentadecane (C15). It degraded between 0.27% - 9.65% individual diesel oil alkanes. The strain has exhibited the potential of degrading diesel oil n-alkanes and was identified as Alcaligenes species strain B11 (MZ027604) using the 16S rRNA sequencing.

scholarly journals ASFP (Artificial Intelligence based Scoring Function Platform): a web server for the development of customized scoring functions

2021 ◽  
Vol 13 (1) ◽  
Author(s):  
Xujun Zhang ◽  
Chao Shen ◽  
Xueying Guo ◽  
Zhe Wang ◽  
Gaoqi Weng ◽  
...  
Keyword(s):  
High Efficiency ◽  
Low Cost ◽  
Pearson Correlation ◽  
Scoring Function ◽  
Web Server ◽  
Scoring Functions ◽  
Protein Ligand Interactions ◽  
Prediction Module ◽  
Ligand Interactions ◽  
Benchmark Datasets

AbstractVirtual screening (VS) based on molecular docking has emerged as one of the mainstream technologies of drug discovery due to its low cost and high efficiency. However, the scoring functions (SFs) implemented in most docking programs are not always accurate enough and how to improve their prediction accuracy is still a big challenge. Here, we propose an integrated platform called ASFP, a web server for the development of customized SFs for structure-based VS. There are three main modules in ASFP: (1) the descriptor generation module that can generate up to 3437 descriptors for the modelling of protein–ligand interactions; (2) the AI-based SF construction module that can establish target-specific SFs based on the pre-generated descriptors through three machine learning (ML) techniques; (3) the online prediction module that provides some well-constructed target-specific SFs for VS and an additional generic SF for binding affinity prediction. Our methodology has been validated on several benchmark datasets. The target-specific SFs can achieve an average ROC AUC of 0.973 towards 32 targets and the generic SF can achieve the Pearson correlation coefficient of 0.81 on the PDBbind version 2016 core set. To sum up, the ASFP server is a powerful tool for structure-based VS.

Principles for evaluating the state of a used motor oil

1992 ◽  
Vol 28 (4) ◽  
pp. 211-214
Author(s):  
V. L. Lashkhi ◽  
G. I. Shor ◽  
V. A. Zolotov
Keyword(s):  
The State ◽  
Motor Oil ◽  
Used Motor Oil

scholarly journals Features of the cytokine balance in infectious hemorrhagic colitis in children

2019 ◽  
Vol 18 (3) ◽  
pp. 11-16 ◽  
Author(s):  
O. I. Klimova ◽  
N. V. Gonchar ◽  
Yu. V. Lobzin ◽  
L. A. Alekseeva ◽  
N. E. Monakhova
Keyword(s):  
Young Children ◽  
Pearson Correlation ◽  
Correlation Method ◽  
Relative Number ◽  
Suppressive Effect ◽  
Hemorrhagic Colitis ◽  
Cytokine Balance ◽  
Severity Of The Disease ◽  
Relationship Of ◽  
The Relationship

The aim of the study was to study the features of cytokine balance and their effect on clinical and laboratory parameters in infectious hemorrhagic colitis in children. Materials and methods. In the Department of intestinal infections in 2018 observed 28 children with infectious haemorrhagic colitis. The diagnosis was established taking into account clinical recommendations; the severity of the disease was determined by the Clark index; the etiology was verified according to bacteriological and molecular studies of feces, serological methods. In the acute period of the disease, the concentration of cytokines in the blood serum — TNF-a, IL-4, IL-6, IL-10 was studied by enzyme immunoassay. Mann-Whitney method, Kruskal-Wallis dispersion analysis, Pearson correlation method we used to estimate the obtained data.Results. The age structure of patients was dominated by young children (53.6%). Mild form of the disease was diagnosed in 32.1% of patients, moderate — in 67.9%. A high level of IL-4 was observed against a relatively low level of TNF-a, IL-6 and IL-10. Significantly higher concentrations of TNF-a and IL-6 were found in children with moderate form of the disease. The maximum values of IL-6 were observed in young children, IL-10 — in infants. In the moderate form of the disease, negative correlations of IL-4 with the number of leukocytes (r = –0.46; p = 0.05) and platelets (r = –0.48; p < 0.05) in the hemogram noted. Early age patients were found to have correlations of TNF-a with the relative number of rod neutrophils (r = 0.62; p < 0.01). There was a significant correlation of IL-4 with the relative number of segmental neutrophils (r = 0.49; p < 0.05). The relationship of TNF-a with the severity of the disease (r = 0.42; p < 0.05) revealed. The data on the possible suppressive effect of TNF-a and IL-10 on the synthesis of urea and the relationship of IL-6 with reactive changes in the liver obtained.Conclusion. Studies of cytokine balance in infectious hemorrhagic colitis in children showed the severity of systemic inflammatory response with the activation of Th-2 immune response. The correlation of TNF-a with the severity of the disease was established, which may have diagnostic and prognostic value.

scholarly journals Do aggression and impulsivity dominate dark triad across genders?

2020 ◽  
Author(s):  
Anupriya Singh ◽  
Aisha Naeem ◽  
Komal Chandiramani
Keyword(s):  
Gender Differences ◽  
Standard Deviation ◽  
Pearson Correlation ◽  
Correlation Method ◽  
Dark Triad ◽  
T Test ◽  
Descriptive Statistics ◽  
Regression Analyses ◽  
Future Directions ◽  
Significant Relationships

The study investigated gender differences in Overall Dark Triad (Machiavellianism, Narcissism, and Psychopathy), Aggression, Impulsivity, and impact of Dark triad on Aggression and Impulsivity. Data was collected from 214 young adults. Analyses was done using descriptive statistics (mean and standard deviation). T-test was employed to analyze gender differences. Pearson Correlation Method and Multiple regression were used to assess the relation and prediction amongst the variables, respectively. T-test suggested significant gender differences in Machiavellianism, Psychopathy, and Overall Dark Triad, with females scoring high than males. No gender difference was observed in Aggression and Impulsivity. Correlation and regression analyses revealed several significant relationships between the above constructs. The research was concluded by briefly foregrounding some of the study’s implications and future directions.

scholarly journals PENGUKURAN TRANSPARANSI KEUANGAN DAERAH BERBASIS WEBSITE PADA KABUPATEN/KOTA DI INDONESIA

2019 ◽  
Vol 4 (1) ◽  
pp. 153
Author(s):  
Muhammad Rizki Alwahidi ◽  
Darwanis Darwanis
Keyword(s):  
Local Government ◽  
Pearson Correlation ◽  
Correlation Method ◽  
Average Level ◽  
Probability Sampling ◽  
Financial Transparency

The purpose of this study was to measure the level of regional financial transparency and see the correlations between the wealth of the local government and BPK's opinion on the level of regional financial transparency in districts / cities in Indonesia. The sample taken in this study is probability sampling with Slovin method. The number of samples used in this study is 224 districts / cities. The data obtained were analyzed using Simple Pearson correlation method. The results of this study indicate that the average level of regional financial transparency in districts / cities in Indonesia is 18.85%. The highest value is 71% obtained by Natuna Regency and the lowest value is 2.09 obtained by 48 regencies / cities in Indonesia. The results of this study also show that the level of local government wealth and BPK's Opinion have a very low relationship to the level of regional financial transparency.

scholarly journals Visualization of Correlation for Air Pollution Time Series using TAQMN Data

2019 ◽  
Vol 8 (3) ◽  
pp. 7922-7927
Keyword(s):  
Air Pollution ◽  
Time Series ◽  
Particulate Matter ◽  
Pearson Correlation ◽  
Fine Particulate Matter ◽  
Correlation Method ◽  
Well Being ◽  
Pollution Levels ◽  
Fine Particulate ◽  
Pm2.5 Concentration

In Taiwan country Annan, Chiayi, Giran, and Puzi cities are facing a serious fine particulate matter (PM2.5) issue. To date the impressive advance has been made toward understanding the PM2.5 issue, counting special temporal characterization, driving variables and well-being impacted. However, notable research as has been done on the interaction of the content between the selected cities of Taiwan country for particulate matter (PM2.5) concentration. In this paper, we purposed a visualization technique based on this principle of the visualization, cross-correlation method and also the time-series concentration with particulate matter (PM2.5) for different cities in Taiwan. The visualization also shows that the correlation between the different meteorological factors as well as the different air pollution pollutants for particular cities in Taiwan. This visualization approach helps to determine the concentration of the air pollution levels in different cities and also determine the Pearson correlation, r values of selected cities are Annan, Puzi, Giran, and Wugu.

Innovations in Mobile Broadband in Japan and its Implications to Developing Countries

2011 ◽  
Vol 2 (4) ◽  
pp. 1-16
Author(s):  
Sheikh Taher Abu
Keyword(s):  
Developing Countries ◽  
Mobile Phone ◽  
Mobile Phones ◽  
Developmental Stages ◽  
Pearson Correlation ◽  
Correlation Method ◽  
Daily Lives ◽  
Mobile Broadband ◽  
Policy And Strategy ◽  
Economic Technology

Japan has experienced two developmental stages in the mobile telephony innovation since 1979 when the first mobile phone was commercially launched. The stages can be identified as traditional mobile phone with only voice function and mobile phone with IP (Internet Protocol). This paper discusses how mobile phone with IP function offers diversified services, influences people’s daily lives by changing their ways of communication, and interaction by adopting mobile broadband. The paper examines key economic, technology and policy factors based on monthly datasets from 2000-2007 in the provision of both second (2G) and third generation (3G) mobile phones adoption. Particularly, the study uses a linear regression model and presents extended and reduced models using the Pearson correlation method. The results of the empirical study examine how innovations in services contribute to the mobile broadband deployment in Japan. Main findings of this study suggest policy and strategy implications for developing countries which are adopting IP functionality in mobile phones. The paper also presents brief recommendations for India’s 3G mobile phone adoptions in terms of opportunities, challenges, and policies which drive on growth.

scholarly journals Formulation of modified bitumen emulsions from polymer wastes and used motor oil

2020 ◽  
Author(s):  
Mohd Najib Razali ◽  
Nurul Izatie Ismanni ◽  
Mohd Khairul Nizam Mohd Zuhan ◽  
Musfafikri Musa ◽  
Abdurahman Hamid Nour
Keyword(s):  
Motor Oil ◽  
Modified Bitumen ◽  
Used Motor Oil ◽  
Polymer Wastes ◽  
Bitumen Emulsions
Sign in / Sign up

Export Citation Format

Share Document