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Hoang NB, Ngo TCQ, Tran TKN, Lam VT. Comprehensive review on synthesis, physicochemical properties, and application of activated carbon from the Arecaceae plants for enhanced wastewater treatment. OPEN CHEM 2022. [DOI: 10.1515/chem-2021-0117] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
Abstract
Arecaceae presents one of the plant families distributed mainly in the equatorial and subequatorial regions. Arecaceae are widely applied in many fields such as food, cosmetics, fuel, and chemical industries. However, a large amount of agricultural waste from the Arecaceae trees has been released into the environment. The objective of this report is to gain more insights into the potentials and applications of activated carbon (AC) from the Arecaceae trees in wastewater treatment, in which, the ability to handle organic pigments, metals, and antibiotics is focused. The physical properties and processability of AC are statistically evaluated. With a uniform structure, large specific surface area, processing ability according to Langmuir and pseudo-second-order models, we showed that ACs from Arecaceae trees are promising materials for water treatment applications. This is the basis for the development and reduction of by-products that affect the environment.
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Affiliation(s)
- Ngoc Bich Hoang
- Faculty of Food and Environmental Engineering, Nguyen Tat Thanh University , Ho Chi Minh City 700000 , Vietnam
- Institute of Applied Technology and Sustainable Development, Nguyen Tat Thanh University , Ho Chi Minh City , Vietnam
| | - Thi Cam Quyen Ngo
- Faculty of Food and Environmental Engineering, Nguyen Tat Thanh University , Ho Chi Minh City 700000 , Vietnam
- Institute of Applied Technology and Sustainable Development, Nguyen Tat Thanh University , Ho Chi Minh City , Vietnam
| | - Thi Kim Ngan Tran
- Faculty of Food and Environmental Engineering, Nguyen Tat Thanh University , Ho Chi Minh City 700000 , Vietnam
- Institute of Applied Technology and Sustainable Development, Nguyen Tat Thanh University , Ho Chi Minh City , Vietnam
| | - Van Tan Lam
- Institute of Applied Technology and Sustainable Development, Nguyen Tat Thanh University , Ho Chi Minh City , Vietnam
- Department of Science and Technology, People’s Committee in Ben Tre , Ben Tre City 86000 , Vietnam
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Lam VT, Ngo TCQ, Bach LG. Facile Fabrication of Novel NiFe 2O 4@Carbon Composites for Enhanced Adsorption of Emergent Antibiotics. Materials (Basel) 2021; 14:ma14216710. [PMID: 34772240 PMCID: PMC8587843 DOI: 10.3390/ma14216710] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/11/2021] [Revised: 07/31/2021] [Accepted: 08/02/2021] [Indexed: 11/26/2022]
Abstract
Water purification is becoming one of the most pertinent environmental issues throughout the world. Among common types of water pollution involving heavy metals, pharmaceutical drugs, textile dyes, personal care products, and other persistent organic pollutants, the pollution of antibiotic drugs is increasingly emerging due to their adverse effects on microorganisms, aquatic animals, and human health. Therefore, the treatment of such contaminants is very necessary to reduce the concentration of antibiotic pollutants to permissible levels prior to discharge. Herein, we report the use of NiFe2O4@C composites from a bimetallic-based metal-organic framework Ni-MIL-88B(Fe) for removal of ciprofloxacin (CFX) and tetracycline (TCC). The effect of production temperatures (600–900 °C), solution pH (2–10), NiFe2O4@C dose (0.05–0.2 g/L), concentration of antibiotics (10–60 mg/L), and uptake time (0–480 min) was investigated systematically. Response surface methodology and central composite design were applied for quadratic models to discover optimum conditions of antibiotic adsorption. With high coefficients of determination (R2 = 0.9640–0.9713), the proposed models were significant statistically. Under proposed optimum conditions, the adsorption capacity for CFX and TCC were found at 256.244, and 105.38 mg/g, respectively. Recyclability study was employed and found that NiFe2O4@C-900 could be reused for up to three cycles, offering the potential of this composite as a good adsorbent for removal of emergent antibiotics.
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Affiliation(s)
- Van Tan Lam
- Institute of Environmental Technology and Sustainable Development, Nguyen Tat Thanh University, Ho Chi Minh City 700000, Vietnam;
- Department of Science and Technology, People’s Committee in Ben Tre, Ben Tre City 86000, Vietnam
- Correspondence: (V.T.L.); (L.G.B.)
| | - Thi Cam Quyen Ngo
- Institute of Environmental Technology and Sustainable Development, Nguyen Tat Thanh University, Ho Chi Minh City 700000, Vietnam;
- Faculty of Environment and Food Technology, Nguyen Tat Thanh University, Ho Chi Minh City 700000, Vietnam
| | - Long Giang Bach
- Institute of Environmental Technology and Sustainable Development, Nguyen Tat Thanh University, Ho Chi Minh City 700000, Vietnam;
- Faculty of Environment and Food Technology, Nguyen Tat Thanh University, Ho Chi Minh City 700000, Vietnam
- Correspondence: (V.T.L.); (L.G.B.)
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Tran LT, Le TM, Nguyen TM, Tran QT, Le XD, Pham MQ, Lam VT, Van Do M. Simultaneous removal efficiency of H2S and CO2 by high-gravity rotating packed bed: Experiments and simulation. OPEN CHEM 2021. [DOI: 10.1515/chem-2020-0187] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
Abstract
This study explores the possibility of applying high-gravity rotating packed bed (HGRPB) in removing H2S and CO2 from biogas. Ca(OH)2 aqueous solution was used as the absorbent in this study. Different experimental conditions including solution pH, rotating speed (R
S) of HGRPB, gas flow rate (Q
G), and liquid flow rate (Q
L) were investigated with respect to the removal efficiency (E) of H2S and CO2. The experimental and simulated results show that the optimal removal efficiency of H2S and CO2 using HGRPB achieved nearly the same as 99.38 and 99.56% for removal efficiency of H2S and 77.28 and 77.86% for removal efficiency of CO2, respectively. Such efficiencies corresponded with the following optimal conditions: a solution pH of 12.26, HGRPB reactor with the rotating speed of 1,200 rpm, the gas flow rate of 2.46 (L/min), and the liquid flow rate of 0.134 (L/min).
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Affiliation(s)
- Lien Thi Tran
- Institute of Environmental Technology, Vietnam Academy of Science and Technology , 18 Hoang Quoc Viet, Cau Giay , Hanoi , 100000 , Vietnam
- Graduate University of Science and Technology, Vietnam Academy of Science and Technology , 18 Hoang Quoc Viet, Cau Giay , Hanoi , 100000 , Vietnam
| | - Tuan Minh Le
- Institute of Environmental Technology, Vietnam Academy of Science and Technology , 18 Hoang Quoc Viet, Cau Giay , Hanoi , 100000 , Vietnam
- Graduate University of Science and Technology, Vietnam Academy of Science and Technology , 18 Hoang Quoc Viet, Cau Giay , Hanoi , 100000 , Vietnam
| | - Tuan Minh Nguyen
- Institute of Environmental Technology, Vietnam Academy of Science and Technology , 18 Hoang Quoc Viet, Cau Giay , Hanoi , 100000 , Vietnam
| | - Quoc Toan Tran
- Graduate University of Science and Technology, Vietnam Academy of Science and Technology , 18 Hoang Quoc Viet, Cau Giay , Hanoi , 100000 , Vietnam
- Institute of Natural Products Chemistry, Vietnam Academy of Science and Technology , 18 Hoang Quoc Viet, Cau Giay , Hanoi , 100000 , Vietnam
| | - Xuan Duy Le
- Institute of Natural Products Chemistry, Vietnam Academy of Science and Technology , 18 Hoang Quoc Viet, Cau Giay , Hanoi , 100000 , Vietnam
| | - Minh Quan Pham
- Graduate University of Science and Technology, Vietnam Academy of Science and Technology , 18 Hoang Quoc Viet, Cau Giay , Hanoi , 100000 , Vietnam
- Institute of Natural Products Chemistry, Vietnam Academy of Science and Technology , 18 Hoang Quoc Viet, Cau Giay , Hanoi , 100000 , Vietnam
| | - Van Tan Lam
- NTT Hi-Tech Institute, Nguyen Tat Thanh University , Ho Chi Minh City , 755414 , Vietnam
- Center of Excellence for Green Energy and Environmental Nanomaterials, Nguyen Tat Thanh University , Ho Chi Minh City , Vietnam
| | - Manh Van Do
- Institute of Environmental Technology, Vietnam Academy of Science and Technology , 18 Hoang Quoc Viet, Cau Giay , Hanoi , 100000 , Vietnam
- Graduate University of Science and Technology, Vietnam Academy of Science and Technology , 18 Hoang Quoc Viet, Cau Giay , Hanoi , 100000 , Vietnam
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Seifert R, Wenzel-Seifert K, Gether U, Lam VT, Kobilka BK. Examining the efficiency of receptor/G-protein coupling with a cleavable beta2-adrenoceptor-gsalpha fusion protein. Eur J Biochem 1999; 260:661-6. [PMID: 10102993 DOI: 10.1046/j.1432-1327.1999.00161.x] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
Reconstitution of high-affinity agonist binding at the beta2-adrenoceptor (beta2AR) expressed in Sf9 insect cells requires a large excess of the stimulatory G-protein of adenylyl cyclase, Gsalpha, relative to receptor [R. Seifert, T. W. Lee, V. T. Lam & B. K. Kobilka, (1998) Eur. J. Biochem. 255, 369-382]. In a fusion protein of the beta2AR and Gsalpha (beta2AR-Gsalpha), which has only a 1 : 1 stoichiometry of receptor and G-protein, high-affinity agonist binding and agonist-stimulated GTP hydrolysis, guanosine 5'-O-(3-thiotriphosphate) (GTP[S]) binding and adenylyl cyclase (AC) activation are more efficient than in the nonfused coexpression system. In order to analyze the stability of the receptor/G-protein interaction, we constructed a fusion protein with a thrombin-cleavage site between beta2AR and Gsalpha (beta2AR-TS-Gsalpha). beta2AR-TS-Gsalpha efficiently reconstituted high-affinity agonist binding, agonist-stimulated GTP hydrolysis, GTP[S] binding and AC activation. Thrombin cleaves approximately 70% of beta2AR-TS-Gsalpha molecules in Sf9 membranes. Thrombin cleavage did not impair high-affinity agonist binding and GTP[S] binding but strongly reduced ligand-regulated GTPase activity and AC activity. We conclude that fusion of the beta2AR to Gsalpha promotes tight physical association of the two partners and that this association remains stable for a single activation/deactivation cycle even after cleavage of the link between the receptor and G-protein. Dilution of Gsalpha in the membrane and release of activated Gsalpha into the cytosol can both prevent cleaved beta2AR-TS-Gsalpha from undergoing multiple activation/deactivation cycles.
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Affiliation(s)
- R Seifert
- Howard Hughes Medical Institute, Stanford University Medical, California, USA
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Seifert R, Lee TW, Lam VT, Kobilka BK. Reconstitution of beta2-adrenoceptor-GTP-binding-protein interaction in Sf9 cells--high coupling efficiency in a beta2-adrenoceptor-G(s alpha) fusion protein. Eur J Biochem 1998; 255:369-82. [PMID: 9716378 DOI: 10.1046/j.1432-1327.1998.2550369.x] [Citation(s) in RCA: 89] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
In most studies, coupling of the beta2-adrenoceptor (beta2AR) to the stimulatory, heterotrimeric GTP-binding protein of adenylyl cyclase the (Gs) is studied indirectly by measuring adenylyl cyclase activation. The aim of this study was to establish a model system in which beta2AR-Gs interactions can be studied directly at the level of the G-protein. We expressed the beta2AR alone, in combination with the alpha-subunit of Gs (G(s alpha)), and as fusion protein with G(s alpha) (beta2AR-G(s alpha)) in Sf9 insect cells. The beta2AR expressed alone couples poorly to the endogenous G(s alpha)-like G-protein of Sf9 cells since no high-affinity agonist binding could be detected, and the effects of agonist and inverse agonist on adenylyl cyclase, high-affinity GTPase and guanosine 5'-O-(3-thiotriphosphate) (GTP[S]) binding were small. Beta2AR-G(s alpha) reconstituted high-affinity agonist binding and regulated adenylyl cyclase more effectively than the beta2AR co-expressed with a large excess of G(s alpha). In membranes expressing beta2AR-G(s alpha), highly effective agonist- and inverse agonist regulation of high-affinity GTP hydrolysis and GTP[S] binding was observed. In contrast, agonist and inverse agonist regulation of GTP hydrolysis and GTP[S] binding in membranes expressing beta2AR and G(s alpha) as separate proteins was difficult to detect. Our data show that the beta2AR interacts with G(s alpha) more efficiently when expressed as a fusion protein than when expressed with an excess of non-fused G(s alpha). The beta2AR-G(s alpha) fusion protein provides a very sensitive model system to study the regulation of Gs function by beta2AR agonists and inverse agonists directly at the level of the G-protein.
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Affiliation(s)
- R Seifert
- Howard Hughes Medical Institute, Stanford University Medical School, California 94305-5428, USA
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Pennica D, Lam VT, Weber RF, Kohr WJ, Basa LJ, Spellman MW, Ashkenazi A, Shire SJ, Goeddel DV. Biochemical characterization of the extracellular domain of the 75-kilodalton tumor necrosis factor receptor. Biochemistry 1993; 32:3131-8. [PMID: 8384489 DOI: 10.1021/bi00063a027] [Citation(s) in RCA: 42] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
Abstract
An expression plasmid encoding the extracellular domain of the 75-kDa human tumor necrosis factor (TNF) type 2 receptor (TNF-R2) was constructed and used to generate a stable cell line secreting soluble TNF-R2 (sTNF-R2). Purified sTNF-R2 was resolved by SDS-PAGE into one band of approximate M(r) 43,000, consistent with a molecular weight of 36,000 +/- 4800 obtained by sedimentation equilibrium analysis. The apparent molecular weight observed by gel filtration chromatography was approximately 136,000. Glycosylation analysis revealed that Asn-149 is fully glycosylated, while Asn-171 is incompletely glycosylated (approximately 50%), and that a proline-, serine-, and threonine-rich region (residues 175-234) contains O-linked carbohydrate structures. Scatchard analysis of [125I]TNF-alpha and [125I]TNF-beta binding to sTNF-R2 gave dissociation constants (Kd) of 0.3 and 0.75 nM, respectively, comparable to those observed for intact cell-surface TNF-R2. The sTNF-R2 was found to block the cytotoxicity of both TNF-alpha and TNF-beta in a murine L-M cell assay. The sizes of the sTNF-R2.TNF-alpha and sTNF-R2.TNF-beta complexes determined by gel filtration chromatography were approximately 322 and 204 kDa, respectively. The stoichiometry of the sTNF-R2.TNF-alpha and sTNF-R2.TNF-beta complexes were examined by size-exclusion chromatography, sedimentation equilibrium, and cross-linking. The data from these studies suggest that at least two molecules of sTNF-R2 can bind to a single TNF-alpha or TNF-beta trimer.
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Affiliation(s)
- D Pennica
- Department of Molecular Biology, Genentech, Inc., South San Francisco, California 94080
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Abstract
A complete pathway for Azorhizobium caulinodans nicotinate catabolism has been determined from mutant phenotype analyses, isolation of metabolic intermediates, and structural studies. Nicotinate serves as a respiratory electron donor to O2 via a membrane-bound hydroxylase and a specific c-type cytochrome oxidase. The resulting oxidized product, 6-hydroxynicotinate, is next reduced to 1,4,5,6-tetrahydro-6-oxonicotinate. Hydrolytic ring breakage follows, with release of pyridine N as ammonium. Decarboxylation then releases the nicotinate C-7 carboxyl group as CO2, and the remaining C skeleton is then oxidized to yield glutarate. Transthioesterification with succinyl coenzyme A (succinyl-CoA) yields glutaryl-CoA, which is then oxidatively decarboxylated to yield crotonyl-CoA. As with general acyl beta oxidation, L-beta-hydroxybutyryl-CoA, acetoacetyl-CoA, and finally two molecules of acetyl-CoA are produced. In sum, nicotinate is catabolized to yield two CO2 molecules, two acetyl-CoA molecules, and ammonium. Nicotinate catabolism stimulates Azorhizobium N2 fixation rates in culture. Nicotinate catabolism mutants still able to liberate pyridine N as ammonium retain this capability, whereas mutants so blocked do not. From, mutant analyses and additional physiological tests, N2 fixation stimulation is indirect. In N-limited culture, nicotinate catabolism augments anabolic N pools and, as a consequence, yields N2-fixing cells with higher dinitrogenase content.
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Affiliation(s)
- C L Kitts
- Department of Biology, Sinsheimer Laboratories, University of California, Santa Cruz 95064
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Pennica D, Lam VT, Mize NK, Weber RF, Lewis M, Fendly BM, Lipari MT, Goeddel DV. Biochemical properties of the 75-kDa tumor necrosis factor receptor. Characterization of ligand binding, internalization, and receptor phosphorylation. J Biol Chem 1992; 267:21172-8. [PMID: 1328224] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022] Open
Abstract
An expression plasmid encoding the human 75-kDa tumor necrosis factor (TNF) type 2 receptor (TNF-R2) was constructed and used to generate a stable human cell line (293/TNF-R2) overexpressing TNF-R2. Ligand binding analysis revealed high affinity binding (Kd = 0.2 nM) with approximately 94,000 +/- 7,500 sites/cell for 125I-TNF-alpha and approximately 5-fold lower affinity for TNF-beta (Kd = 1.1 nM) with 264,000 +/- 2,000 sites/cell. Cross-linking of 125I-TNF-alpha and 125I-TNF-beta to 293/TNF-R2 cells yielded predominant complexes with apparent molecular weights of 211,000 for TNF-alpha and 205,000 and 244,000 for TNF-beta, suggesting these complexes contain two or three TNF-R2 molecules. Immunoprecipitation of TNF-R2 from 32P-labeled 293/TNF-R2 cells demonstrated that the receptor is phosphorylated. The majority (97%) of 32Pi incorporation was found in serine residues with a very low level of incorporation (3%) in threonine residues. TNF-alpha treatment of 293/TNF-R2 cells did not significantly affect the degree or pattern of phosphorylation. Cell surface-bound 125I-TNF-alpha was slowly internalized by the 293/TNF-R2 cell line with a t1/2 = 25 min. Shedding of the extracellular domain of TNF-R2 was induced by 4 beta-phorbol 12-myristate 13-acetate but not by TNF-alpha or TNF-beta.
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Affiliation(s)
- D Pennica
- Department of Molecular Biology, Genentech, Incorporated, South San Francisco, California 94080
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Lam VT, Nieto J. [Rehabilitation of unilateral femoral amputees, over 55 years of age and of vascular origin]. Union Med Can 1981; 110:774-9. [PMID: 7303317] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
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Lam VT, Bisson-Doyal D, Copti MC, Lebrun LH, Chartrand R, Lamoureux F. [2 cases of porencephaly]. Union Med Can 1979; 108:1083-90. [PMID: 120630] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
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