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Tectona grandis Callus Produces Antibacterial Triterpene Acids Not Detected in the Intact Plant
Marwani, Erly,Kobayashi, Akio,Kajiyama, Shin-ichiro,Fukusaki, Eiichiro,Nitoda, Teruhiko,Kanzaki, Hiroshi,Kawazu, Kazuyoshi The Korean Society of Pharmacognosy 1997 Natural Product Sciences Vol.3 No.1
Preliminary antibacterial assay data that the Tectona grandis callus extract showed more antibacterial activity against E. coli and B. subtilis than the leaf extract led the authors to isolate the following antibacterial compounds from the callus. A mixture (3) of $2{\alpha},3{\beta}-dihydroxy-olean-12-en-28-oic$ acid (3a) and $2{\alpha},3{\beta}-dihydroxy-urs-12-en-28-oic$ acid (3b) exhibited the most potent antibacterial activity against both bacteria. The other 3 compounds, in the decreasing order of the activity, were identified as $2{\alpha},3{\beta}-dihydroxy-urs-12-en-28-oic$ acid (2), betulinic acid (1), and $2{\alpha},3{\alpha}$,23-trihydroxy-urs-12-en-28-oic acid (4). The antibacterial compounds (2, 3a, 3b and 4) were not detected or occurring in small quantities in the intact tissue, while they were observed in the callus. Only the less active compound 1 was present more abundantly in intact tissues than the callus.
Widiyanto Sri Nanan,Sulaiman Syahril,Duve Simon,Marwani Erly,Nugrahapraja Husna,Diningrat Diky Setya 한국식물생명공학회 2023 JOURNAL OF PLANT BIOTECHNOLOGY Vol.50 No.2
Water scarcity decreases the rate of photo- synthesis and, consequently, the yield of banana plants (Musa spp). In this study, transcriptome analysis was performed to identify photosynthesis-related genes in banana plants and determine their expression profiles under water stress conditions. Banana plantlets were in vitro cultured on Murashige and Skoog agar medium with and without 10% polyethylene glycol and marked as BP10 and BK. Chlorophyll contents in the plant shoots were determined spectrophotometrically. Two cDNA libraries generated from BK and BP10 plantlets, respectively, were used as the reference for transcriptome data. Gene ontology (GO) enrichment analysis was performed using the Database for Annotation, Visualization, and Integrated Discovery (DAVID) and visualized using the Kyoto Encyclopedia of Genes and Genomes (KEGG) pathway prediction. Morphological obser- vations indicated that water deficiency caused chlorosis and reduced the shoot chlorophyll content of banana plantlets. GO enrichment identified 52 photosynthesis-related genes that were affected by water stress. KEGG visualization revealed the pathways related to the 52 photosynthesis- related genes and their allocations in four GO terms. Four, 12, 15, and 21 genes were related to chlorophyll biosynthesis, the Calvin cycle, the photosynthetic electron transfer chain, and the light-harvesting complex, respectively. Differentially expressed gene (DEG) analysis using DESeq revealed that 45 genes were down-regulated, whereas seven genes were up-regulated. Four of the down-regulated genes were responsible for chlorophyll biosynthesis and appeared to cause the decrease in the banana leaf chlorophyll content. Among the annotated DEGs, MaPNDO, MaPSAL, and MaFEDA were selected and validated using quantitative real-time PCR.
Mohammed M. Rahman,Sher Bahadar Khan,Hadi M. Marwani,Abdullah M. Asiri,Khalid A. Alamry,Malik Abdul Rub,Anish Khan,Aftab Aslam Parwaz Khan,Naved Azum 한국공업화학회 2014 Journal of Industrial and Engineering Chemistry Vol.20 No.4
In this report, the doped ZnO-CdO nanoblocks (NBs) have been synthesized by facile wet-chemical technique at low-temperature and characterized by UV–vis, FT-IR, XRD, FESEM, XPS, XEDS, etc. The NBs were applied for the selective detection of Fe(III) ions and photo-catalytic degradation using Brilliant cresol blue (BCB). The analytical efficiency of NBs phase was also investigated for a selective detection of Fe(III) by ICP-OES. NBs were found to be the most selective toward Fe(III), where adsorption process was mainly monolayer on a homogeneous adsorbent surface. In photo-catalysis, almost 52.3% degradation with BCB dye was observed under solar sources with NBs.
Tahir Ali Sheikh,Mohammed M. Rahman,Abdullah M. Asiri,Hadi M. Marwani,Md. Rabiul Awual 한국공업화학회 2018 Journal of Industrial and Engineering Chemistry Vol.66 No.-
In this approach, Co3O4@Er2O3 nanorods (NRs) were prepared by a wet-chemical method using reducing agents in alkaline medium. The resulting nanoparticles were characterized in details by UV/Vis and FT-IR spectroscopy, X-ray powder diffraction, Elemental dispersive analysis (EDS) coupled with field-emission scanning electron microscopy (FESEM). Co3O4@Er2O3NRs were deposited on a glassy carbon electrode (GCE) to give a selective sensor with a fast response toward 4-hexyl resorcinol (4-HR) in phosphate buffer phase (PBS) by electrochemical approach. The 4-HR sensor also displays good sensitivity, large linear dynamic range, lowest detection limit, and long-term stability, and enhanced electrochemical response. The calibration plot is linear over the 0.1 nM–0.01 M 4-HR concentration range. The sensitivity is ∼14.765 μAμM−1cm−2, and the detection limit is 64.29 pM (signal-to-noise ratio, at a SNR of 3). We also discuss possible future prospective uses of this doped metal oxide semiconductor nanomaterial in terms of chemical sensing.
Esraa M. Bakhsh,Sher Bahadar Khan,Hadi M. Marwani,Ekram Y. Danish,Abdullah M. Asiri 한국공업화학회 2019 Journal of Industrial and Engineering Chemistry Vol.73 No.-
Development of nanostructured materials has received tremendous attention nowadays due to theirunique properties and efficacious in wide range of applications. Herein, we present a facile synthesis ofZnSe–CdSe/SiO2 core–shell nanomaterial for pollutants monitoring and environmental remediationpurposes. The utility of ZnSe–CdSe/SiO2 core–shell nanomaterial was explored toward electrochemicaldetection and adsorptive removal of copper ions from aquatic system. Experimental results reveal thatboth electrochemical detection and adsorption of Cu(II) using ZnSe–CdSe/SiO2 nanomaterial stronglydepends on the solution pH, with an optimum pH of 5. Based on the results, the amperometric sensorbased on ZnSe–CdSe/SiO2 core–shell nanomaterial modified electrode exhibited a detection limit of50 mg L 1. Moreover, ZnSe–CdSe/SiO2 core–shell nanomaterial as adsorbent demonstrated high uptakecapacity equals to 126.25 mg g 1. Thus, ZnSe–CdSe/SiO2 core–shell nanomaterial can be employed aspromising material for several environmental remediation purposes.
Low dimensional Ni-ZnO nanoparticles as marker of toxic lead ions for environmental remediation
Mohammed M. Rahman,Sher Bahadar Khan,Hadi M. Marwani,Abdullah M. Asiri,Khalid A. Alamry,Malik Abdul Rub,Anish Khan,Aftab Aslam Parwaz Khan,Abdullah H. Qusti 한국공업화학회 2014 Journal of Industrial and Engineering Chemistry Vol.20 No.3
We have synthesized Ni-ZnO nanoparticles (NPs) by a wet-chemical route using reducing agents. Thestructural and optical properties of Ni-ZnO NPs were investigated by various conventional methods. Theanalytical potential of the Ni-ZnO NPs was studied for a selective detection of toxic Pb(II) ion usingrecognized ICP-OES method for environmental remediation. Data obtained from the selectivity studyindicated that the selectivity of Ni-ZnO NPs phase was the most toward Pb(II) ion. However, theadsorption isotherm data of Pb(II) on Ni-ZnO NPs phase was good-match with the Langmuir-Adsorption-Isotherm, strongly supporting that the adsorption process was mainly monolayer on homogeneousadsorbent surfaces.
Anish Khan,Aftab Aslam Parwaz Khan,Abdullah M. Asiri,Malik Abdul Rub,Naved Azum,Sher Bahadar Khan,Hadi M. Marwani 한국공업화학회 2014 Journal of Industrial and Engineering Chemistry Vol.20 No.4
A new class hybrid poly(2-methoxy aniline) Sn(II)silicate carbon nanotubes composite was synthesized by sol–gel method. The physico-chemical characterization was carried out by Scanning Electron micrograph, X-ray Diffraction, Fourier Transform Infrared, Ultraviolet–Visible Spectroscopy and simultaneous Thermo Gravimetric Analysis. The ion-exchange studies were also carried out to understand the ion-exchange capabilities. The dc electrical conductivity studies reviles its highly conducting nature in the range of 2–3-2 S cm-1. On the basis of distribution studies it was found highly selective for Hg2+. Due to selectivity of the composite, ion selective membrane was prepared and employed it as an indicator electrode in potentiometric titrations.
Dadong Shao,Xiaolin Wang,Xuemei Ren,Sheng Hu,Jun Wen,Zhaoyi Tan,Jie Xiong,Abdullah M. Asiri,Hadi M. Marwani 한국공업화학회 2018 Journal of Industrial and Engineering Chemistry Vol.67 No.-
Finding poly(amidoxime) (PAO) based adsorbent with better performance in U(VI) extraction from seawater is a hot research topic. By employing plasma treatment, the bi-functionalized adsorbents containing amidoxime and phosphate (labelled as PO4/PAO) were successfully synthesized. The obtained PO4/PAO was characterized and applied for the potential extraction of U(VI) from aqueous solution. The results show that −PO4 enhanced the hydrophilicity of PAO. PO4/PAO possesses good selective sorption ability for U(VI) and excellent reusability. The findings is helpful to understand optimizing performance of PAO based adsorbents for uranium extraction from seawater.
Mohammed M. Rahman,M.M. Alam,Abdullah M. Asiri,Sulaiman Y. M. Alfaifi,Hadi M. Marwani 한국공업화학회 2022 Journal of Industrial and Engineering Chemistry Vol.106 No.-
High performance acute toxic methanol sensor based on hydrothermally prepared hexagonal nanodiscs(NDs) of ZnO/CdO/SnO2 (ZnCdSnO2 or ZCSO) was fabricated onto glassy carbon electrode (GCE). The characterizationof ZCSO NDs in-terms of functional group analysis, binding energy evaluation, oxidationstates, optical absorbance, crystallinity, structural morphology, and elemental compositions were performedby FTIR spectroscopy, X-ray photoelectron spectroscopy (XPS), UV–visible spectroscopy, XRD,FESEM-coupled-EDS analysis respectively. The current versus concentration plot was exhibited linearon a wide range of methanol concentration (0.01 nM to 0.1 mM) clarified as linear dynamic methanoldetection range (LDR). Considering the ZCSO NDs-coated surface area onto GCE over the slope of LDR,noticeable methanol sensor sensitivity (4.5475 mA mM1 cm2) was perceived. Besides this, a considerablelower limit (7.69 ± 0.38 pM) of detection at signal/noise = 3 is obtained. The overall results of methanolchemical sensor were found with satisfactory and acceptable results in terms of their reproducibility,sensitivity, stability, and response-time. Additionally, the assembled ZCSO NDs-coated electrode was validatedwith real environmental samples and result was found good and acceptable. On considering theoutcome of applicability and the way of this sensor assembling, this unique method might be a potentialtechnique in the field of portable sensor development for the safety of environmental and healthcarefields in a broad scale.
Congcong Ding,Wencai Cheng,Xiaoqin Nie,Facheng Yi,Shuhong Xiang,Abdullah M. Asiri,Hadi M. Marwani 한국공업화학회 2018 Journal of Industrial and Engineering Chemistry Vol.61 No.-
More discrete and active nano-scale zero-valent iron (NZVI) particles were obtained by assembling them on the surface of carbonized fungi (F) in this study. NZVI/F composites can totally remove 0.25 mmol/L U(VI) in 0.5 h at pH 6.5. Both sorption and reductive precipitation of U(VI) resulted in the high removal. Preliminary evidence showed that the influence of ions (Na+, K+, Ca2+, Mg2+, and CO32−) on NZVI/F composites reactivity varied with system pH. Our findings could provide an essential start in the treatment of water containing U(VI) and multiply coexistent ions, and open the doorways for the application of NZVI/F composites.