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Methanotrophy-driven accumulation of organic carbon in four paddy soils of Bangladesh

Pedosphere 2022年第2期32卷 348-358页

作者： Nasrin SULTANA Jun ZHAO Yuanfeng CAI G.K.M.Mustafizur rahman mohammad Saiful ALAM mohammad FAHEEM Adrian HO Zhongjun JIA State Key Laboratory of Soil and Sustainable Agriculture Institute of Soil ScienceChinese Academy of SciencesNanjing 210008China University of Chinese Academy of Sciences Beijing 100049China Department of Agroforestry and Environmental Science Faculty of AgricultureSher-e-Bangla Agricultural University(SAU)Sher-e-Bangla NagarDhaka-1207Bangladesh Department of Soil Science Faculty of AgricultureBangabandhu Sheikh Mujibur Rahman Agricultural University(BSMRAU)Gazipur-1706Bangladesh Institute for Microbiology Leibniz Universität HannoverHerrenhäuser Straße 2Building 4104Hannover D-30419Germany

Biological methane oxidation is a crucial process in the global carbon cycle that reduces methane emissions from paddy fields and natural wetlands into the ***,soil organic carbon accumulation associated with microbial methane oxidation is poorly ***,to investigate methane-derived carbon incorporation into soil organic matter,paddy soils originated from different parent materials(Inceptisol,Entisol,and Alfisol) were collected after rice harvesting from four major rice-producing regions in *** microcosm incubation with 5%(volume/volume)^(13) CH_(4),soil^(13) C-atom abundances significantly increased from background level of 1.08% to 1.88%–2.78%,leading to a net methane-derived accumulation of soil organic carbon ranging from 120 to 307 mg kg^(-1).Approximately 23.6%–60.0% of the methane consumed was converted to soil organic carbon during microbial methane *** phylogeny of^(13) C-labeled pmoA(enconding the alpha subunit of the particulate methane monooxygenase) and 16 S rRNA genes further revealed that canonical α(type II) and γ(type I) Proteobacteria were active methane *** within the Methylobacter-and Methylosarcina-affiliated type Ia lineages dominated active methane-oxidizing communities that were responsible for the majority of methane-derived carbon accumulation in all three paddy soils,while Methylocystis-affiliated type IIa lineage was the key contributor in one paddy soil of Inceptisol *** results suggest that methanotroph-mediated synthesis of biomass plays an important role in soil organic matter *** study thus supports the concept that methanotrophs not only consume the greenhouse gas methane but also serve as a key biotic factor in maintaining soil fertility.

关键词： 16S rRNA gene DNA-based stable-isotope probing(DNA-SIP) methane oxidation methanotroph pmoA rice soil soil organic carbon soil organic matter

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Spatial distribution,source apportionment,and associated risks of trace metals (As,Pb,Cr,Cd,and Hg) from a subtropical river,Gomti,Bangladesh

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International Journal of Sediment Research 2022年第1期37卷 83-96页

作者： Abu Sayeed Shafiuddin Ahmed mohammad Belal Hossain Saad mohammad Omar Faruque Babu Moshiur rahman Jun Sun mohammad Shafiqul Islam Sarker Department of Fisheries and Marine Science Noakhali Science and Technology University School of Engineering and Built Environment Griffith University College of Marine and Environmental Sciences Tianjin University of Science and Technology Forensic Science Laboratory Rapid Action Battalions Headquarters

Sediment samples from the Gomti River basin were investigated to determine and evaluate trace metal concentrations,their biological effect,and potential ecological and human health risks for adults and *** mean concentrations of trace metals were organized in the descending order of mercury(Hg)(0.08 mg/kg)>chromium (Cr)(0.06 mg/kg)>lead (Pb)(0.05 mg/kg)>arsenic (As)(0.02 mg/kg)>cadmium (Cd)(0.01 mg/kg).The current study illustrated that metals were attributed to the area from natural sources and different anthropogenic sources especially from ***,the concentration levels were lower than the sediment quality guidelines (SQGs) based on the effect-range classifications of threshold effect concentration (TEC) and probable effect concentration (PEC).Therefore,the concentration of the elements showed no adverse biological effects on aquatic *** evaluated potential ecological risk index also revealed the low toxicity to the aquatic ***,the applied sediment quality indices,geo-accumulation index (Igeo),contamination factor (CF),and contamination severity index (CSI) suggested that the contamination levels of the elements were in the acceptable range,and the contamination had not notably impacted on the sediment *** risk index (HI) concerning age groups was significantly less than the threshold limit of 1 indicating that the contamination had no non-carcinogenic risk *** total carcinogenic risk (TCR) was less than a risk value of 1×***,the current study suggests that immediate remediation is not required due to an absence of alarming conditions in the study *** monitoring of the attribution of the metal elements should be done for the betterment of human and environmental health.

关键词： Trace metals Biological effects Ecological risk Human health risk Gomti river Bangladesh

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Biochar potentially enhances maize tolerance to arsenic toxicity by improving physiological and biochemical responses to excessive arsenate

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Biochar 2023年第1期5卷 1222-1242页

作者： Md.Mezanur rahman Ashim Kumar Das Sharmin Sultana Protik Kumar Ghosh Md.Robyul Islam Sanjida Sultana Keya Minhaz Ahmed Sheikh Arafat Islam Nihad MdArifur rahman khan Mylea C.Lovell Md.Abiar rahman S.M.Ahsan Touhidur rahman Anik Pallavi Fnu Lam-Son Phan Tran mohammad Golam Mostofa Department of Plant Soil ScienceInstitute of Genomics for Crop Abiotic Stress ToleranceTexas Tech UniversityLubbockTX 79409USA Department of Agroforestry EnvironmentBangabandhu Sheikh Mujibur Rahman Agricultural UniversityGazipur 1706Bangladesh Institute of Biotechnology and Genetic Engineering(IBGE) Bangabandhu Sheikh Mujibur Rahman Agricultural UniversityGazipur 1706Bangladesh Department of Agronomy Bangabandhu Sheikh Mujibur Rahman Agricultural UniversityGazipur 1706Bangladesh Plant Pathology Division Bangladesh Rice Research InstituteGazipur 1701Bangladesh Department of Agriculture Bangabandhu Sheikh Mujibur Rahman ScienceTechnology UniversityGopalganj 8100Bangladesh Department of Energy Plant Research Laboratory Michigan State UniversityEast LansingMI 48824USA Plant Resilience Institute Michigan State UniversityEast LansingMI 48824USA Department of Biochemistry and Molecular Biology Michigan State UniversityEast LansingMI 48824USA

Metalloid pollution,including arsenic poisoning,is a serious environmental issue,plaguing plant productivity and quality of life ***,a carbon-rich material,has been known to alleviate the negative effects of environmental pollutants on ***,the specific role of biochar in mitigating arsenic stress in maize remains relatively ***,we elucidated the functions of biochar in improving maize growth under the elevated level of sodium arsenate(Na_(2)AsO_(4),AsV).Maize plants were grown in pot-soils amended with two doses of biochar(2.5%(B1)and 5.0%(B2)biochar Kg^(−1) of soil)for 5 days,followed by exposure to Na_(2)AsO_(4)(’B1+AsV’and’B2+AsV’)for 9 *** plants exposed to AsV only accumulated substantial amount of arsenic in both roots and leaves,triggering severe phytotoxic effects,including stunted growth,leaf-yellowing,chlorosis,reduced photosynthesis,and nutritional imbalance,when compared with control ***,biochar addition improved the phenotype and growth of AsV-stressed maize plants by reducing root-to-leaf AsV translocation(by 46.56 and 57.46%in‘B1+AsV’and‘B2+AsV’plants),improving gas-exchange attributes,and elevating chlorophylls and mineral levels beyond AsV-stressed *** pretreatment also substantially counteracted AsV-induced oxidative stress by lowering reactive oxygen species accumulation,lipoxygenase activity,malondialdehyde level,and electrolyte *** oxidative stress in‘B1+AsV’and‘B2+AsV’plants likely supported by a strong antioxidant system powered by biochar-mediated increased activities of superoxide dismutase(by 25.12 and 46.55%),catalase(51.78 and 82.82%),and glutathione S-transferase(61.48 and 153.83%),and improved flavonoid levels(41.48 and 75.37%,respectively).Furthermore,increased levels of soluble sugars and free amino acids also correlated with improved leaf relative water content,suggesting a better osmotic acclimatization mechanism in biochar-pretreated AsV-exposed plants.

关键词： Arsenic contamination Antioxidant defense system Biochar Gas-exchange attributes Nutrient dynamics Oxidative stress

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Bitter Melon (Momordica Charantia) Reduces Serum Sialic Acid in Type2 Diabetics: Evidence to Delay the Process of Atherosclerosis

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Chinese Medicine 2011年第4期2卷 125-129页

作者： Inayat Ur rahman mohammad Bashir mohammad Salman mohammad Idrees mohammad Iqbal khan 不详

More than 1000 herbal products have been used by diverse cultures of the world to treat hyperglycemia and among them bitter melon (Momordica charantia) is one of the most popular herbal resource. The beneficial effects of bitter melon is not limited to hypoglycaemia only, but it also ameliorates diet induced obesity, insulin resistance and exhibit cardioprotective effects. The present study attempts to investigate the effect of bitter melon fruit juice on a newly investigated risk factor, sialic acid in type2 diabetics. A total of 40 type2 diabetic patients, divided into group A (n = 20) and group B (n = 20) were investigated during the present study. The patients of group A were following bitter melon fruit juice treatment along with diet control, whereas the patients of group B were on diet control only. Serum sialic acid (SSA) decreased in group A from 66.20 ± 2.30 mg/dl to 63.50 ± 2.10 mg/dl (<0.11) but, increased in group B from 66.50 ± 1.70 mg/dl to 68.20 ± 2.50 mg/dl (<0.12), compared to baseline. Post-treatment between group comparison revealed a significant difference (<0.05). The beneficial effects on fasting plasma glucose (FPG) and glycohemoglobin (HbA1-c) were also greater in group A compared to group B as was the case with blood lipids, weight and blood pressure. The study provides another mechanism for the cardioprotective effect of bitter melon and further strengthens its value in the management of type2 diabetes.

关键词： Sialic Acid Type2 Diabetes Mellitus Bitter Melon Cardiovascular Disease

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Design and Analysis of a Compact Band Notch UWB Antenna for Body Area Network

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Journal of Electromagnetic Analysis and Applications 2018年第9期10卷 157-169页

作者： H. M. Arifur rahman mohammad Monirujjaman khan Department of Electrical & Computer Engineering School of Engineering & Physical Science North South University Bashundhara Dhaka

This paper presents the design of a small printed ultra wideband antenna with Band Notched characteristics. Both the free space and on-body performances of this antenna were investigated through simulation. The newly designed UWB antenna is more revised small form factor sized, with the ability to avoid interference caused by WLAN (5.15 - 5.825 GHz) and WiMAX (5.25 - 5.85 GHz) systems with a band notch. The return loss response, gain, radiation pattern on free space of the antenna were investigated. After that, the on-body performances were tested on 3-layer human body model with radiation pattern, gain, return loss, and efficiency at 3.5, 5.7, 8, 10 GHz and all the results were compared with free space results. As the on-body performance was very good, the proposed antenna will be suitable to be used for multi-purpose medical applications and sports performance monitoring.

关键词： Ultra Wide Band Antenna Small Form Factor Antenna Body Area Networks Band Notch Printed Antenna Wireless Body Area Network Multiple Slot Antenna

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Anomaly Detection in ICS Datasets with Machine Learning Algorithms

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Computer Systems Science & Engineering 2021年第4期37卷 33-46页

作者： Sinil Mubarak Mohamed Hadi Habaebi Md Rafiqul Islam Farah Diyana Abdul rahman mohammad Tahir International Islamic University Malaysia Jalan Gombak53100Malaysia Sunway University Selangor47500Malaysia

An Intrusion Detection System (IDS) provides a front-line defensemechanism for the Industrial Control System (ICS) dedicated to keeping the process operations running continuously for 24 hours in a day and 7 days in a week.A well-known ICS is the Supervisory Control and Data Acquisition (SCADA)system. It supervises the physical process from sensor data and performs remotemonitoring control and diagnostic functions in critical infrastructures. The ICScyber threats are growing at an alarming rate on industrial automation applications. Detection techniques with machine learning algorithms on public datasets,suitable for intrusion detection of cyber-attacks in SCADA systems, as the firstline of defense, have been detailed. The machine learning algorithms have beenperformed with labeled output for prediction classification. The activity trafficbetween ICS components is analyzed and packet inspection of the dataset is performed for the ICS network. The features of flow-based network traffic areextracted for behavior analysis with port-wise profiling based on the data baseline,and anomaly detection classification and prediction using machine learning algorithms are performed.

关键词： Industrial control system SCADA intrusion detection system machine learning anomaly detection

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Effect of Cobalt Doping on the Microstructure and Tensile Properties of Lead Free Solder Joint Subjected to Electromigration

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Journal of Materials Science & Technology 2016年第11期32卷 1129-1136页

作者： M.Nasir Bashir A.S.M.A.Haseeb Abu Zayed mohammad Saliqur rahman M.A.Fazal Department of Mechanical Engineering University of Malaya

Rapid Cu diffusion is one of the main causes of electromigration（EM） failure in lead-free solder *** this study, an effort has been made to investigate the detrimental effects of EM on microstructure and mechanical performance of solder joint by introducing Co nanoparticles（NP） doped flux at the interface between SAC305 solder and copper substrate. EM tests were conducted on un-doped SAC305 and Co-doped SAC305 solder joints for different time intervals, with the maximum duration of 1128 h. A DC current was applied to the both types of solder joints to achieve a current density of 1 × 104A/cm2. EM tests were performed in an oil bath maintained at a constant temperature of 80 °C. It is found that Codoped flux significantly reduced the formation of cracks and voids at the cathode interface. Co atoms entered into the lattice of Cu6Sn5 leading to the formation of（Cu, Co）6Sn5. This thermodynamically stabilized the interfacial intermetallic（IMC） layers both at the anode and cathode sides and suppressed the change in their thickness. The average anodic growth rate of（Cu, Co）6Sn5 interfacial IMC in the doped sample was about one order of magnitude lower compared with that of Cu6Sn5 in the un-doped ***-NP also improved the tensile strength considerably before and after EM. The report suggests that the reliability of solder joint during EM can be improved by using Co-NP doped flux.

关键词： Electromigration damages Tensile strength Intermetallic compounds Nanoparticles Reliability

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Phytopharmacological evaluation of ethanol extract of Sida cordifolia ***

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Asian Pacific Journal of Tropical Biomedicine 2014年第1期4卷 18-24页

作者： mohammad Abdul Motalib Momin Sm Faysal Bellah Sarder mohammad Raussel rahman Ahmed Ayedur rahman Gazi mohammad Monjur Murshid Sarder mohammad Saker Billah Talha Bin Emran Department of Pharmacy Jahangirnagar University Department of Clinical Pharmacy and Pharmacology Dhaka University Pharmacy Discipline Life Science SchoolKhulna University Department of Chemistry Gort.M.M.University College Department of Pharmacy BGC Trust University

Objective:To investigate the phytochemical screening(group determination)and selected pharmacological activities(antioxidant,antimicrobial and analgesic activity)of the plant Sida cordifolia Linn(***).Methods:Eighty percent concentrated ethanol extract of the roots was *** identify the chemical constituents of plant extract standard procedures were *** phytochemical screening the crude extract was tested for the presence of different chemical groups like reducing sugar,tannins,saponins,steroids,flavonoids,gums,alkaloids and *** antioxidant property of ethanolic extract of *** was assessed by DPPH free radical scavenging *** activity of the extract was tested using the model of acetic acid induced writhing in *** sodium is used as reference standard drug for the analgesic activity test Antibacterial activity of plant extract was carried out using disc diffusion method with five pathogenic bacteria comparison with kanamycin as a ***:Phytochemical analysis of the ethanolic extract of the roots of *** indicated the presence of reducing sugar,alkaloids,steroids and *** DPPH scavenging assay the IC_(50)value was found to be 50 ug/mL which was not comparable to the standard ascorbic *** crude extract produced 44.3%inhibition of writhing at the dose of 300 mg/kg body weight which is statistically significant(P>0.001).The in vitro antimicrobial activity of the ethanol extract of the roots of *** showed no antimicrobial activity against five types of *** experiment was conducted only with five species of bacteria as test species,which do not at all indicate the total inactivity against ***:The obtained results provide a support for the use of this plant in traditional medicine but further pharmacological studies are required.

关键词： Antioxidant Antimicrobial Analgesic DPPH Phytochemical screening

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Enhancing Septic Shock Detection through Interpretable Machine Learning

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Computer Modeling in Engineering & Sciences 2024年第12期141卷 2501-2525页

作者： Md Mahfuzur rahman Md Solaiman Chowdhury mohammad Shorfuzzaman Lutful Karim Md Shafiullah Farag Azzedin Department of Information and Computer Science King Fahd University of Petroleum and MineralsDhahran31261Saudi Arabia Department of Electrical and Computer Engineering North South UniversityDhaka1229Bangladesh Department of Computer Science Taif UniversityTaif21974Saudi Arabia College of Applied Arts and Technology Seneca PolytechnicTorontoM2J 2X5Canada Department of Control&Instrumentation Engineering King Fahd University of Petroleum and MineralsDhahran31261Saudi Arabia

This article presents an innovative approach that leverages interpretable machine learning models and cloud computing to accelerate the detection of septic shock by analyzing electronic health *** traditional methods,which often lack transparency in decision-making,our approach focuses on early detection,offering a proactive strategy to mitigate the risks of *** integrating advanced machine learning algorithms with interpretability techniques,our method not only provides accurate predictions but also offers clear insights into the factors influencing the model’s ***,we introduce a preference-based matching algorithm to evaluate disease severity,enabling timely interventions guided by the analysis *** innovative integration significantly enhances the effectiveness of our *** leverage a clinical health dataset comprising 1,552,210 Electronic Health Records(EHR)to train our interpretable machine learning models within a cloud computing *** techniques like feature importance analysis and model-agnostic interpretability tools,we aim to clarify the crucial indicators contributing to septic shock *** transparency not only assists healthcare professionals in comprehending the model’s predictions but also facilitates the integration of our system into existing clinical *** validate the effectiveness of our interpretable models using the same dataset,achieving an impressive accuracy rate exceeding 98%through the application of oversampling *** findings of this study hold significant implications for the advancement of more effective and transparent diagnostic tools in the critical domain of sepsis management.

关键词： Sepsis prediction machine learning cloud computing

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A compact transmit/receive switch for 2.4 GHz reader-less active RFID tag transceiver

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Journal of Central South University 2015年第2期22卷 546-551页

作者： mohammad Arif Sobhan Bhuiyan Mamun Bin Ibne Reaz Jubayer Jalil Labonnah Farzana rahman Tae Gyu Chang Department of Electrical Electronic and Systems Engineering Universiti Kebangsaan Malaysia43600 UKM Bangi Selangor Malaysia School of Electrical and Electronics Engineering Chung-Ang University

Radio frequency identification(RFID) is a ubiquitous identification technology nowadays. An on-chip high-performance transmit/receive(T/R) switch is designed and simulated in 0.13-μm CMOS technology for reader-less RFID tag. The switch utilizes only the transistor width and length(W/L) optimization, proper gate bias resistor and resistive body floating technique and therefore,exhibits 1 d B insertion loss, 31.5 d B isolation and 29.2 d Bm 1-d B compression point(P1d B). Moreover, the switch dissipates only786.7 n W power for 1.8/0 V control voltages and is capable of switching in 794 fs. Above all, as there is no inductor or capacitor used in the circuit, the size of the switch is 0.00208 mm2 only. This switch will be appropriate for reader-less RFID tag transceiver front-end as well as other wireless transceivers operated at 2.4 GHz band.

关键词： body floating CMOS radio frequency identification(RFID) transmit/receive(T/R) switch transceiver

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