1
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Palupi H, Estiasih T, Yunianta, Sutrisno A. Physicochemical and protein characterization of lima bean (Phaseolus lunatus L) seed. Food Res 2022. [DOI: 10.26656/fr.2017.6(1).107] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
Lima bean (Phaseolus lunatus L) is native to Latin America and has spread out
worldwide, thus having a high level of diversity. The lima bean seed from a specific
region might have different characteristics from others. This study was aimed to
characterize the physicochemical and protein of the dry seed of lima bean from Indonesia
based on its solubility, electrophoretic pattern, and amino acid profile. The result showed
that carbohydrate (68.89±1.55%) was the major component, with starch (41.96±1.10%) as
the predominant. The amylopectin was higher than amylose. Dietary fibre (27.87±0.37%)
was significant and dominated by insoluble one (25.47±0.32%). The fat content
(1.15±0.04%) was low and ash (3.67±0.47%) comprised of magnesium, phosphorus,
potassium, calcium, and iron with the content of 184, 75, 38, 11, and 10 mg/100 g,
respectively. Total phenolic compounds of this seed were 1.29±0.02 mg/g, phytic acid
11.57±0.03 mg/g, saponins 16.84±0.42 mg/g, and trypsin inhibitors 36.07±0.11 TIU/g.
HCN was found significantly at 30.99±0.29 ppm. Oligosaccharides were 5.93±0.29% that
comprised of raffinose 1.22±0.08% and stachyose 4.61±0.21%. Protein content was
moderate (15.93±0.55%) that comprised of albumin 18.47±0.62%, globulin 56.20±2.00%,
prolamin 3.14±0.20%, and glutelin 22.69±1.60%. The molecular weight of this protein
was 10-141 kDa with 12 polypeptides. Globulin had 12 polypeptides of 10 to 124 kDa.
Albumin had 18 to 116 kDa molecular weights, while glutelin had six polypeptides of 13
to 109 kDa. Prolamin did not have visible polypeptides. Lysine, leucine, valine, and
phenylalanine were the primary essential amino acids with high lysine but low methionine
and cysteine. In conclusion, lima bean seed is a source of carbohydrates and minerals,
with a moderate protein content dominated by the globulin. The polypeptide profile of
lima bean seed is varied depending on the protein fractions. The occurrence of antinutrition might hinder its utilization as a protein source. HCN as a toxicant should be
removed to obtain a safe seed for consumption.
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Abstract
Hydroxyapatite (HAP) is a cost-effective material to remove excess levels of fluoride from water. Historically, HAP has been considered a fluoride adsorbent in the environmental engineering community. This paper substantiates an uptake paradigm that has recently gained disparate support: assimilation of fluoride to bulk apatite lattice sites in addition to surface lattice sites. Pellets of HAP nanoparticles (NPs) were packed into a fixed-bed media filter to treat solutions containing 30 mg-F/L (1.58 mM) at pH 8, yielding an uptake of 15.97 ± 0.03 mg-F/g-HAP after 864 h. Solid-state 19F and 13C magic-angle spinning nuclear magnetic resonance spectroscopy demonstrated that all removed fluoride is apatitic. A transmission electron microscopy analysis of particle size distribution, morphology, and crystal habit resulted in the development of a model to quantify adsorption and total fluoride capacity. Low- and high-estimate median adsorption capacities were 2.40 and 6.90 mg-F/g-HAP, respectively. Discrepancies between experimental uptake and adsorption capacity indicate the range of F- that internalizes to satisfy conservation of mass. The model was developed to demonstrate that F- internalization in HAP NPs occurs under environmentally relevant conditions and as a tool to understand the extent of F- internalization in HAP NPs of any kind.
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Affiliation(s)
- Daniel S Mosiman
- Safe Global Water Institute, Department of Civil and Environmental Engineering, University of Illinois at Urbana-Champaign (UIUC), Urbana, Illinois 61801, United States
| | - Andre Sutrisno
- NMR/EPR Laboratory, School of Chemical Sciences NMR Facility, University of Illinois at Urbana-Champaign (UIUC), Urbana, Illinois 61801, United States
| | - Riqiang Fu
- National High Magnetic Field Laboratory, Tallahassee, Florida 32310, United States
| | - Benito J Mariñas
- Safe Global Water Institute, Department of Civil and Environmental Engineering, University of Illinois at Urbana-Champaign (UIUC), Urbana, Illinois 61801, United States
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3
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Hamideh RA, Akbari B, Fathi P, Misra SK, Sutrisno A, Lam F, Pan D. Biodegradable MRI Visible Drug Eluting Stent Reinforced by Metal Organic Frameworks. Adv Healthc Mater 2020; 9:e2000136. [PMID: 32548977 DOI: 10.1002/adhm.202000136] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2020] [Revised: 04/13/2020] [Indexed: 12/18/2022]
Abstract
Metal-organic frameworks (MOFs) have applications in numerous fields. However, the development of MOF-based "theranostic" macroscale devices is not achieved. Here, heparin-coated biocompatible MOF/poly(ε-caprolactone) (PCL) "theranostic" stents are developed, where NH2 -Materials of Institute Lavoisier (MIL)-101(Fe) encapsulates and releases rapamycin (an immunosuppressive drug). These stents also act as a remarkable source of contrast in ex vivo magnetic resonance imaging (MRI) compared to the invisible polymeric stent. The in vitro release patterns of heparin and rapamycin respectively can ensure a type of programmed model to prevent blood coagulation immediately after stent placement in the artery and stenosis over a longer term. Due to the presence of hydrolysable functionalities in MOFs, the stents are shown to be highly biodegradable in degradation tests under various conditions. Furthermore, there is no compromise of mechanical strength or flexibility with MOF compositing. The system described here promises many biomedical applications in macroscale theranostic devices. The use of MOF@PCL can render a medical device MRI-visible while simultaneously acting as a carrier for therapeutic agents.
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Affiliation(s)
- Rezvani Alanagh Hamideh
- Department of Life Science Engineering, Faculty of New Sciences and Technologies, University of Tehran, P.O. Box 14395-1561, Tehran, Iran
- Department of Bioengineering, Beckman Institute of Advanced Science and Technology, Department of Materials Science and Engineering, University of Illinois at Urbana-Champaign, Carle Foundation Hospital, 611 West Park Street, Urbana, IL, 61801, USA
| | - Babak Akbari
- Department of Life Science Engineering, Faculty of New Sciences and Technologies, University of Tehran, P.O. Box 14395-1561, Tehran, Iran
| | - Parinaz Fathi
- Department of Bioengineering, Beckman Institute of Advanced Science and Technology, Department of Materials Science and Engineering, University of Illinois at Urbana-Champaign, Carle Foundation Hospital, 611 West Park Street, Urbana, IL, 61801, USA
| | - Santosh K Misra
- Department of Bioengineering, Beckman Institute of Advanced Science and Technology, Department of Materials Science and Engineering, University of Illinois at Urbana-Champaign, Carle Foundation Hospital, 611 West Park Street, Urbana, IL, 61801, USA
| | - Andre Sutrisno
- NMR/EPR Laboratory, School of Chemical Sciences, University of Illinois at Urbana-Champaign, IL, USA
| | - Fan Lam
- Department of Bioengineering, Beckman Institute of Advanced Science and Technology, Department of Materials Science and Engineering, University of Illinois at Urbana-Champaign, Carle Foundation Hospital, 611 West Park Street, Urbana, IL, 61801, USA
| | - Dipanjan Pan
- Department of Bioengineering, Beckman Institute of Advanced Science and Technology, Department of Materials Science and Engineering, University of Illinois at Urbana-Champaign, Carle Foundation Hospital, 611 West Park Street, Urbana, IL, 61801, USA
- Department of Diagnostic Radiology and Nuclear Medicine, University of Maryland Baltimore, Health Sciences Facility III, 670 W Baltimore St., Baltimore, MD, 21201, USA
- Department of Pediatrics, University of Maryland Baltimore, Health Sciences Facility III, 670 W Baltimore St., Baltimore, MD, 21201, USA
- Department of Chemical, Biochemical and Environmental Engineering, University of Maryland Baltimore County, Interdisciplinary Health Sciences Facility, 1000 Hilltop Circle, Baltimore, MD, 21250, USA
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4
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Patria D, Sutrisno A, Hsu JL, Lin J. Physical properties and cooking quality of extruded restructured rice: impact of water temperature and water level. Food Res 2020. [DOI: 10.26656/fr.2017.4(5).141] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
Rice is the main food for approximately 3.5 billion people worldwide, especially in
Asians, who have consumed more than 90% of the total rice produced. Restructured rice is
another designation of artificial rice is an effort to diversify staple foods processed from
carbohydrate-based raw materials with the addition of certain substances to improve the
quality of staple foods. Restructured rice can be done with several techniques, such as
using extrusion. This study aimed to investigate the effect water content (35%, 37.5%,
40%, 42.5%, and 45%) and temperature (100oC and 26oC) on the surface and
characteristics of restructured rice using a pasta extruder. Results of this study showed the
treatment with water content 40% and temperature 100oC to be the best, more precisely
seen from the results of laser microscope, color, WAI, WSI, WAR, Cooking losses, and
cooking time. Pores and surfaces of restructured rice are almost the same as milled rice.
Water absorption index (WAI) value = 2.273±0.10 g/g, WSI = 2.114±0.11%, WAR =
150.99±0.77%, CL = 1.92±0.10% and cooking time 4 mins. Suggestions for this research
are further studies such as fortification with other ingredients using a pasta extruder
technology and are expected to be implemented and commercialized.
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6
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Bregante DT, Tan JZ, Sutrisno A, Flaherty DW. Heteroatom substituted zeolite FAU with ultralow Al contents for liquid-phase oxidation catalysis. Catal Sci Technol 2020. [DOI: 10.1039/c9cy01886g] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Titanium-substituted FAU stabilizes aromatic alkenes to greater extents than BEA and mesoporous silica.
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Affiliation(s)
- Daniel T. Bregante
- Department of Chemical and Biomolecular Engineering
- University of Illinois at Urbana-Champaign
- Urbana
- USA
| | - Jun Zhi Tan
- Department of Chemical and Biomolecular Engineering
- University of Illinois at Urbana-Champaign
- Urbana
- USA
| | - Andre Sutrisno
- NMR/EPR Laboratory
- School of Chemical Sciences
- University of Illinois at Urbana-Champaign
- Urbana
- USA
| | - David W. Flaherty
- Department of Chemical and Biomolecular Engineering
- University of Illinois at Urbana-Champaign
- Urbana
- USA
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7
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Bakir M, Meyer JL, Sutrisno A, Economy J, Jasiuk I. Aromatic thermosetting copolyester bionanocomposites as reconfigurable bone substitute materials: Interfacial interactions between reinforcement particles and polymer network. Sci Rep 2018; 8:14869. [PMID: 30291259 PMCID: PMC6173751 DOI: 10.1038/s41598-018-33131-5] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/22/2018] [Accepted: 08/30/2018] [Indexed: 02/08/2023] Open
Abstract
Development of porous materials consisting of polymer host matrix enriched with bioactive ceramic particles that can initiate the reproduction of cellular organisms while maintaining in vivo mechanical reliability is a long-standing challenge for synthetic bone substitutes. We present hydroxyapatite (HA) reinforced aromatic thermosetting copolyester (ATSP) matrix bionanocomposite as a potential reconfigurable bone replacement material. The nanocomposite is fabricated by solid-state mixing a matching set of precursor oligomers with biocompatible pristine HA particles. During endothermic condensation polymerization reaction, the constituent oligomers form a mechanochemically robust crosslinked aromatic backbone while incorporating the HAs into a self-generated cellular structure. The morphological analysis demonstrates near-homogenous distributions of the pristine HAs within the matrix. The HAs behave as a crack-arrester which promotes a more deformation-tolerant formation with relatively enhanced material toughness. Chain relaxation dynamics of the nanocomposite matrix during glass transition is modified via HA-induced segmental immobilization. Chemical characterization of the polymer backbone composition reveals the presence of a hydrogen-advanced covalent interfacial coupling mechanism between the HAs and ATSP matrix. This report lays the groundwork for further studies on aromatic thermosetting copolyester matrix bionanocomposites which may find applications in various artificial bone needs.
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Affiliation(s)
- Mete Bakir
- Department of Mechanical Science and Engineering, University of Illinois at Urbana-Champaign, Urbana, IL, 61801, USA
| | - Jacob L Meyer
- Department of Mechanical Science and Engineering, University of Illinois at Urbana-Champaign, Urbana, IL, 61801, USA.,ATSP Innovations, Champaign, IL, 61820, USA
| | - Andre Sutrisno
- NMR/EPR Laboratory, School of Chemical Sciences, University of Illinois at Urbana-Champaign, Urbana, IL, 61801, USA
| | - James Economy
- Department of Materials Science and Engineering, University of Illinois at Urbana-Champaign, Urbana, IL, 61801, USA.,ATSP Innovations, Champaign, IL, 61820, USA
| | - Iwona Jasiuk
- Department of Mechanical Science and Engineering, University of Illinois at Urbana-Champaign, Urbana, IL, 61801, USA.
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8
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Bakir M, Elhebeary M, Meyer JL, Sutrisno A, Economy J, Jasiuk I. Interfacial liquid crystalline mesophase domain on carbon nanofillers in aromatic thermosetting copolyester matrix. J Appl Polym Sci 2018. [DOI: 10.1002/app.46584] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Mete Bakir
- Department of Mechanical Science and Engineering; University of Illinois at Urbana-Champaign; Urbana Illinois 61801
| | - Mohamed Elhebeary
- Department of Mechanical Science and Engineering; University of Illinois at Urbana-Champaign; Urbana Illinois 61801
| | - Jacob L. Meyer
- Department of Mechanical Science and Engineering; University of Illinois at Urbana-Champaign; Urbana Illinois 61801
- ATSP Innovations; Champaign Illinois 61820
| | - Andre Sutrisno
- NMR/EPR Laboratory, School of Chemical Sciences; University of Illinois at Urbana-Champaign; Urbana Illinois 61801
| | - James Economy
- ATSP Innovations; Champaign Illinois 61820
- Department of Materials Science and Engineering; University of Illinois at Urbana-Champaign; Urbana Illinois 61801
| | - Iwona Jasiuk
- Department of Mechanical Science and Engineering; University of Illinois at Urbana-Champaign; Urbana Illinois 61801
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9
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Bakir M, Meyer JL, Sutrisno A, Economy J, Jasiuk I. Nanofiller-conjugated percolating conductive network modified polymerization reaction characteristics of aromatic thermosetting copolyester resin. RSC Adv 2018; 8:4946-4954. [PMID: 35539540 PMCID: PMC9077758 DOI: 10.1039/c7ra12506b] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2017] [Accepted: 01/19/2018] [Indexed: 11/21/2022] Open
Abstract
Deliberately controlled interfacial interactions between incorporated nanofiller particles and host polymer backbone chains constitute a critical element in the realm of polymer nanocomposites with tailorable multifunctional properties. We demonstrate the physicochemical effects induced by graphene nanoplatelets (GNP) of different sizes on the condensation polymerization reaction of aromatic thermosetting copolyester (ATSP) through the formation of electrically conductive percolating networks as enabled by interfacial interactions. Carboxylic acid and acetoxy-capped precursor oligomers of ATSP are solid-state mixed with chemically pristine GNP particles at various loading levels. Upon in situ endothermic condensation polymerization reaction, crosslinked backbone of the ATSP foam matrix is formed while the carbonaceous nanofillers are incorporated into the polymer network via covalent conjugation with functional end-groups of the oligomers. The controlled GNP size promotes different electrical percolation thresholds and ultimate electrical conductivities. Microstructural analysis demonstrates GNP distributions in the matrix as well as morphological modifications induced by the formation of conductive percolating GNP networks. Cure characteristics reveal the thermochemical changes prompted in the polymerization processes for GNP content above the requirement for percolation formation. Chemical spectroscopy of the ATSP nanocomposite morphology exhibits the formation of a robust interfacial coupling mechanism between the GNPs and ATSP backbone. The findings here may guide the developmental efforts of nanocomposites through better identifying roles of the morphology and content of nanofillers in polymerization processes. Physicochemical effects induced by graphene nanoplatelets on the in situ polycondensation reaction of aromatic thermosetting copolyester through the formation of conductive percolating network assembled via interfacial interactions.![]()
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Affiliation(s)
- Mete Bakir
- Department of Mechanical Science and Engineering
- University of Illinois at Urbana-Champaign
- Urbana
- USA
| | - Jacob L. Meyer
- Department of Mechanical Science and Engineering
- University of Illinois at Urbana-Champaign
- Urbana
- USA
- ATSP Innovations
| | - Andre Sutrisno
- NMR/EPR Laboratory
- School of Chemical Sciences
- University of Illinois at Urbana-Champaign
- Urbana
- USA
| | - James Economy
- Department of Materials Science and Engineering
- University of Illinois at Urbana-Champaign
- Urbana
- USA
- ATSP Innovations
| | - Iwona Jasiuk
- Department of Mechanical Science and Engineering
- University of Illinois at Urbana-Champaign
- Urbana
- USA
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10
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Bakir M, Meyer JL, Hussainova I, Sutrisno A, Economy J, Jasiuk I. Macromol. Chem. Phys. 24/2017. MACROMOL CHEM PHYS 2017. [DOI: 10.1002/macp.201770076] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Affiliation(s)
- Mete Bakir
- Department of Mechanical Science and Engineering; University of Illinois at Urbana-Champaign; Urbana IL 61801 USA
| | - Jacob L. Meyer
- Department of Mechanical Science and Engineering; University of Illinois at Urbana-Champaign; Urbana IL 61801 USA
- ATSP Innovations; Champaign IL 61820 USA
| | - Irina Hussainova
- Department of Mechanical Science and Engineering; University of Illinois at Urbana-Champaign; Urbana IL 61801 USA
- Centre of Innovative Industrial Materials; Tallinn University of Technology; Ehitajate 5 Tallinn 19180 Estonia
- ITMO University; Kronverksky 49 St. Petersburg 197101 Russia
| | - Andre Sutrisno
- NMR/EPR Laboratory; School of Chemical Sciences; University of Illinois at Urbana-Champaign; Urbana IL 61801 USA
| | - James Economy
- ATSP Innovations; Champaign IL 61820 USA
- Department of Materials Science and Engineering; University of Illinois at Urbana-Champaign; Urbana IL 61801 USA
| | - Iwona Jasiuk
- Department of Mechanical Science and Engineering; University of Illinois at Urbana-Champaign; Urbana IL 61801 USA
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11
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Bakir M, Meyer JL, Hussainova I, Sutrisno A, Economy J, Jasiuk I. Periodic Functionalization of Graphene‐Layered Alumina Nanofibers with Aromatic Thermosetting Copolyester via Epitaxial Step‐Growth Polymerization. MACROMOL CHEM PHYS 2017. [DOI: 10.1002/macp.201700338] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Mete Bakir
- Department of Mechanical Science and Engineering University of Illinois at Urbana‐Champaign Urbana IL 61801 USA
| | - Jacob L. Meyer
- Department of Mechanical Science and Engineering University of Illinois at Urbana‐Champaign Urbana IL 61801 USA
- ATSP Innovations Champaign IL 61820 USA
| | - Irina Hussainova
- Department of Mechanical Science and Engineering University of Illinois at Urbana‐Champaign Urbana IL 61801 USA
- Centre of Innovative Industrial Materials Tallinn University of Technology Ehitajate 5 Tallinn 19180 Estonia
- ITMO University Kronverksky 49 St. Petersburg 197101 Russia
| | - Andre Sutrisno
- NMR/EPR Laboratory School of Chemical Sciences University of Illinois at Urbana‐Champaign Urbana IL 61801 USA
| | - James Economy
- ATSP Innovations Champaign IL 61820 USA
- Department of Materials Science and Engineering University of Illinois at Urbana‐Champaign Urbana IL 61801 USA
| | - Iwona Jasiuk
- Department of Mechanical Science and Engineering University of Illinois at Urbana‐Champaign Urbana IL 61801 USA
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12
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Affiliation(s)
| | | | | | | | - Angus A. Rockett
- Department of Metallurgical and Materials
Engineering, Colorado School of Mines, Golden, Colorado 80401, United States
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13
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Fortier-McGill BE, Dutta Majumdar R, Lam L, Soong R, Liaghati-Mobarhan Y, Sutrisno A, de Visser R, Simpson MJ, Wheeler HL, Campbell M, Gorissen A, Simpson AJ. Comprehensive Multiphase (CMP) NMR Monitoring of the Structural Changes and Molecular Flux Within a Growing Seed. J Agric Food Chem 2017; 65:6779-6788. [PMID: 28727919 DOI: 10.1021/acs.jafc.7b02421] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
A relatively recent technique termed comprehensive multiphase (CMP) NMR spectroscopy was used to investigate the growth and associated metabolomic changes of 13C-labeled wheat seeds and germinated seedlings. CMP-NMR enables the study of all phases in intact samples (i.e., liquid, gel-like, semisolid, and solid), by combining all required electronics into a single NMR probe, and can be used for investigating biological processes such as seed germination. All components, from the most liquid-like (i.e., dissolved metabolites) to the most rigid or solid-like (seed coat) were monitored in situ over 4 days. A wide range of metabolites were identified, and after 96 h of germination, the number of metabolites in the mobile phase more than doubled in comparison to 0 h (dry seed). This work represents the first application of CMP-NMR to follow biological processes in plants.
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Affiliation(s)
- Blythe E Fortier-McGill
- Department of Physical and Environment Sciences, University of Toronto Scarborough , 1265 Military Trail, Toronto, Ontario Canada , M1C 1A4
| | - Rudraksha Dutta Majumdar
- Department of Physical and Environment Sciences, University of Toronto Scarborough , 1265 Military Trail, Toronto, Ontario Canada , M1C 1A4
| | - Leayen Lam
- Department of Physical and Environment Sciences, University of Toronto Scarborough , 1265 Military Trail, Toronto, Ontario Canada , M1C 1A4
- Department of Chemistry, University of Toronto , 80 St. George Street, Toronto, Ontario Canada , M5S 3H6
| | - Ronald Soong
- Department of Physical and Environment Sciences, University of Toronto Scarborough , 1265 Military Trail, Toronto, Ontario Canada , M1C 1A4
- Department of Chemistry, University of Toronto , 80 St. George Street, Toronto, Ontario Canada , M5S 3H6
| | - Yalda Liaghati-Mobarhan
- Department of Physical and Environment Sciences, University of Toronto Scarborough , 1265 Military Trail, Toronto, Ontario Canada , M1C 1A4
- Department of Chemistry, University of Toronto , 80 St. George Street, Toronto, Ontario Canada , M5S 3H6
| | - Andre Sutrisno
- Department of Physical and Environment Sciences, University of Toronto Scarborough , 1265 Military Trail, Toronto, Ontario Canada , M1C 1A4
- Department of Chemistry, University of Toronto , 80 St. George Street, Toronto, Ontario Canada , M5S 3H6
| | - Ries de Visser
- IsoLife BV , Droevendaalsesteeg 1, 6708 PB Wageningen, The Netherlands
| | - Myrna J Simpson
- Department of Physical and Environment Sciences, University of Toronto Scarborough , 1265 Military Trail, Toronto, Ontario Canada , M1C 1A4
- Department of Chemistry, University of Toronto , 80 St. George Street, Toronto, Ontario Canada , M5S 3H6
| | - Heather L Wheeler
- Department of Biological Sciences, University of Toronto Scarborough , 1265 Military Trail, Toronto, Ontario Canada , M1C 1A4
- Department of Cell Systems and Biology, University of Toronto , 33 Willcocks Street, Toronto, Ontario Canada , M5S 3B2
| | - Malcolm Campbell
- Department of Biological Sciences, University of Toronto Scarborough , 1265 Military Trail, Toronto, Ontario Canada , M1C 1A4
- Department of Cell Systems and Biology, University of Toronto , 33 Willcocks Street, Toronto, Ontario Canada , M5S 3B2
- Molecular and Cell Biology, Summerlee Science Complex, University of Guelph , Guelph, Ontario Canada , N1G 2W1
| | - Antonie Gorissen
- IsoLife BV , Droevendaalsesteeg 1, 6708 PB Wageningen, The Netherlands
| | - André J Simpson
- Department of Physical and Environment Sciences, University of Toronto Scarborough , 1265 Military Trail, Toronto, Ontario Canada , M1C 1A4
- Department of Chemistry, University of Toronto , 80 St. George Street, Toronto, Ontario Canada , M5S 3H6
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14
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Misra SK, Ostadhossein F, Babu R, Kus J, Tankasala D, Sutrisno A, Walsh KA, Bromfield CR, Pan D. 3D-Printed Multidrug-Eluting Stent from Graphene-Nanoplatelet-Doped Biodegradable Polymer Composite. Adv Healthc Mater 2017; 6. [PMID: 28322012 DOI: 10.1002/adhm.201700008] [Citation(s) in RCA: 68] [Impact Index Per Article: 9.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/03/2017] [Revised: 02/16/2017] [Indexed: 11/11/2022]
Abstract
Patients with percutaneous coronary intervention generally receive either bare metal stents or drug-eluting stents to restore the normal blood flow. However, due to the lack of stent production with an individual patient in mind, the same level of effectiveness may not be possible in treating two different clinical scenarios. This study introduces for the first time the feasibility of a patient-specific stenting process constructed from direct 3D segmentation of medical images using direct 3D printing of biodegradable polymer-graphene composite with dual drug incorporation. A biodegradable polymer-carbon composite is prepared doped with graphene nanoplatelets to achieve controlled release of combinatorics as anticoagulation and antirestenosis agents. This study develops a technology prototyped for personalized stenting. An in silico analysis is performed to optimize the stent design for printing and its prediction of sustainability under force exerted by coronary artery or blood flow. A holistic approach covering in silico to in situ-in vivo establishes the structural integrity of the polymer composite, its mechanical properties, drug loading and release control, prototyping, functional activity, safety, and feasibility of placement in coronary artery of swine.
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Affiliation(s)
- Santosh K. Misra
- Department of Bioengineering Beckman Institute of Advanced Science and Technology Department of Materials Science and Engineering Institute for Sustainability in Energy and Environment University of Illinois at Urbana–Champaign Carle Foundation Hospital 611 West Park Street Urbana IL 61801 USA
| | - Fatemeh Ostadhossein
- Department of Bioengineering Beckman Institute of Advanced Science and Technology Department of Materials Science and Engineering Institute for Sustainability in Energy and Environment University of Illinois at Urbana–Champaign Carle Foundation Hospital 611 West Park Street Urbana IL 61801 USA
| | - Ramya Babu
- Department of Bioengineering Beckman Institute of Advanced Science and Technology Department of Materials Science and Engineering Institute for Sustainability in Energy and Environment University of Illinois at Urbana–Champaign Carle Foundation Hospital 611 West Park Street Urbana IL 61801 USA
| | - Joseph Kus
- Department of Bioengineering Beckman Institute of Advanced Science and Technology Department of Materials Science and Engineering Institute for Sustainability in Energy and Environment University of Illinois at Urbana–Champaign Carle Foundation Hospital 611 West Park Street Urbana IL 61801 USA
| | - Divya Tankasala
- Department of Bioengineering Beckman Institute of Advanced Science and Technology Department of Materials Science and Engineering Institute for Sustainability in Energy and Environment University of Illinois at Urbana–Champaign Carle Foundation Hospital 611 West Park Street Urbana IL 61801 USA
| | - Andre Sutrisno
- NMR/EPR Laboratory School of Chemical Sciences University of Illinois at Urbana–Champaign IL USA
| | - Kathleen A. Walsh
- Frederick Seitz Materials Research Laboratory University of Illinois at Urbana–Champaign IL USA
| | - Corinne R. Bromfield
- Agricultural Animal Care and Use Program University of Illinois at Urbana–Champaign IL USA
| | - Dipanjan Pan
- Department of Bioengineering Beckman Institute of Advanced Science and Technology Department of Materials Science and Engineering Institute for Sustainability in Energy and Environment University of Illinois at Urbana–Champaign Carle Foundation Hospital 611 West Park Street Urbana IL 61801 USA
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15
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Perruchoud LH, Jones MD, Sutrisno A, Zamble DB, Simpson AJ, Zhang XA. A ratiometric NMR pH sensing strategy based on a slow-proton-exchange (SPE) mechanism. Chem Sci 2015; 6:6305-6311. [PMID: 30090248 PMCID: PMC6054103 DOI: 10.1039/c5sc02145f] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2015] [Accepted: 07/18/2015] [Indexed: 12/16/2022] Open
Abstract
Real time and non-invasive detection of pH in live biological systems is crucial for understanding the physiological role of acid-base homeostasis and for detecting pathological conditions associated with pH imbalance. One method to achieve in vivo pH monitoring is NMR. Conventional NMR methods, however, mainly utilize molecular sensors displaying pH-dependent chemical shift changes, which are vulnerable to multiple pH-independent factors. Here, we present a novel ratiometric strategy for sensitive and accurate pH sensing based on a small synthetic molecule, SPE1, which exhibits exceptionally slow proton exchange on the NMR time scale. Each protonation state of the sensor displays distinct NMR signals and the ratio of these signals affords precise pH values. In contrast to standard NMR methods, this ratiometric mechanism is not based on a chemical shift change, and SPE1 binds protons with high selectivity, resulting in accurate measurements. SPE1 was used to measure the pH in a single oocyte as well as in bacterial cultures, demonstrating the versatility of this method and establishing the foundation for broad biological applications.
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Affiliation(s)
- L H Perruchoud
- Department of Chemistry , University of Toronto , Toronto , ON M5S 3H6 , Canada . ; ;
- Department of Environmental and Physical Sciences , University of Toronto Scarborough , Toronto , ON M1C 1A4 , Canada
| | - M D Jones
- Department of Chemistry , University of Toronto , Toronto , ON M5S 3H6 , Canada . ; ;
| | - A Sutrisno
- Department of Chemistry , University of Toronto , Toronto , ON M5S 3H6 , Canada . ; ;
- Department of Environmental and Physical Sciences , University of Toronto Scarborough , Toronto , ON M1C 1A4 , Canada
| | - D B Zamble
- Department of Chemistry , University of Toronto , Toronto , ON M5S 3H6 , Canada . ; ;
- Department of Biochemistry , University of Toronto , Toronto , ON M5S 1A8 , Canada
| | - A J Simpson
- Department of Chemistry , University of Toronto , Toronto , ON M5S 3H6 , Canada . ; ;
- Department of Environmental and Physical Sciences , University of Toronto Scarborough , Toronto , ON M1C 1A4 , Canada
| | - X-A Zhang
- Department of Chemistry , University of Toronto , Toronto , ON M5S 3H6 , Canada . ; ;
- Department of Environmental and Physical Sciences , University of Toronto Scarborough , Toronto , ON M1C 1A4 , Canada
- Department of Biological Sciences , University of Toronto Scarborough , Toronto , ON M1C 1A4 , Canada
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16
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Soong R, Nagato E, Sutrisno A, Fortier-McGill B, Akhter M, Schmidt S, Heumann H, Simpson AJ. In vivo NMR spectroscopy: toward real time monitoring of environmental stress. Magn Reson Chem 2015; 53:774-9. [PMID: 25296400 DOI: 10.1002/mrc.4154] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/24/2014] [Accepted: 09/01/2014] [Indexed: 05/24/2023]
Affiliation(s)
- Ronald Soong
- Environmental NMR Center, Department of Physical & Environmental Sciences, University of Toronto Scarborough, Toronto, Ontario, Canada
| | - Edward Nagato
- Environmental NMR Center, Department of Physical & Environmental Sciences, University of Toronto Scarborough, Toronto, Ontario, Canada
| | - Andre Sutrisno
- Environmental NMR Center, Department of Physical & Environmental Sciences, University of Toronto Scarborough, Toronto, Ontario, Canada
| | - Blythe Fortier-McGill
- Environmental NMR Center, Department of Physical & Environmental Sciences, University of Toronto Scarborough, Toronto, Ontario, Canada
| | - Mohammad Akhter
- Environmental NMR Center, Department of Physical & Environmental Sciences, University of Toronto Scarborough, Toronto, Ontario, Canada
- Department of Chemistry, University of Toronto, 80 St. George Street, Toronto, Ontario, Canada
| | | | | | - André J Simpson
- Environmental NMR Center, Department of Physical & Environmental Sciences, University of Toronto Scarborough, Toronto, Ontario, Canada
- Department of Chemistry, University of Toronto, 80 St. George Street, Toronto, Ontario, Canada
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17
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Fugariu I, Fortier-McGill B, Soong R, Sutrisno A, Simpson AJ. Doubling sensitivity in solids NMR: a simple and economical procedure for compressing samples. Magn Reson Chem 2015; 53:769-773. [PMID: 25589502 DOI: 10.1002/mrc.4184] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/02/2014] [Revised: 10/17/2014] [Accepted: 10/18/2014] [Indexed: 06/04/2023]
Affiliation(s)
- Ioana Fugariu
- Environmental NMR Center, Department of Physical and Environment Sciences, University of Toronto Scarborough, 1265 Military Trail, Toronto, ON, Canada
| | - Blythe Fortier-McGill
- Environmental NMR Center, Department of Physical and Environment Sciences, University of Toronto Scarborough, 1265 Military Trail, Toronto, ON, Canada
| | - Ronald Soong
- Environmental NMR Center, Department of Physical and Environment Sciences, University of Toronto Scarborough, 1265 Military Trail, Toronto, ON, Canada
| | - Andre Sutrisno
- Environmental NMR Center, Department of Physical and Environment Sciences, University of Toronto Scarborough, 1265 Military Trail, Toronto, ON, Canada
| | - André J Simpson
- Environmental NMR Center, Department of Physical and Environment Sciences, University of Toronto Scarborough, 1265 Military Trail, Toronto, ON, Canada
- Department of Chemistry, University of Toronto, 80 St. George Street, Toronto, ON, Canada
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18
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Lam L, Soong R, Sutrisno A, de Visser R, Simpson MJ, Wheeler HL, Campbell M, Maas WE, Fey M, Gorissen A, Hutchins H, Andrew B, Struppe J, Krishnamurthy S, Kumar R, Monette M, Stronks HJ, Hume A, Simpson AJ. Comprehensive multiphase NMR spectroscopy of intact ¹³C-labeled seeds. J Agric Food Chem 2014; 62:107-115. [PMID: 24354469 DOI: 10.1021/jf4045638] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
Seeds are complex entities composed of liquids, gels, and solids. NMR spectroscopy is a powerful tool for studying molecular structure but has evolved into two fields, solution and solid state. Comprehensive multiphase (CMP) NMR spectroscopy is capable of liquid-, gel-, and solid-state experiments for studying intact samples where all organic components are studied and differentiated in situ. Herein, intact (13)C-labeled seeds were studied by a variety of 1D/2D (1)H/(13)C experiments. In the mobile phase, an assortment of metabolites in a single (13)C-labeled wheat seed were identified; the gel phase was dominated by triacylglycerides; the semisolid phase was composed largely of carbohydrate biopolymers, and the solid phase was greatly influenced by starchy endosperm signals. Subsequently, the seeds were compared and relative similarities and differences between seed types discussed. This study represents the first application of CMP-NMR to food chemistry and demonstrates its general utility and feasibility for studying intact heterogeneous samples.
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Affiliation(s)
- Leayen Lam
- Department of Physical and Environment Sciences, University of Toronto Scarborough , 1265 Military Trail, Toronto, Ontario, Canada M1C 1A4
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19
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Sutrisno A, Huang Y. Solid-state NMR: a powerful tool for characterization of metal-organic frameworks. Solid State Nucl Magn Reson 2013; 49-50:1-11. [PMID: 23131545 DOI: 10.1016/j.ssnmr.2012.09.003] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/11/2012] [Revised: 09/21/2012] [Accepted: 09/24/2012] [Indexed: 05/13/2023]
Abstract
Metal-organic frameworks (MOFs) are a new type of porous materials with numerous current and potential applications in many areas including ion-exchange, catalysis, sensing, separation, molecular recognition, drug delivery and, in particular, gas storage. Solid-state NMR (SSNMR) has played a pivotal role in structural characterization and understanding of host-guest interactions in MOFs. This article provides an overview on application of SSNMR to MOF systems.
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Affiliation(s)
- Andre Sutrisno
- Department of Chemistry, The University of Western Ontario, London, Ont., Canada N6A 5B7
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20
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Hanson MA, Sutrisno A, Terskikh VV, Baines KM, Huang Y. Back Cover: Solid-State 73Ge NMR Spectroscopy of Simple Organogermanes (Chem. Eur. J. 43/2012). Chemistry 2012. [DOI: 10.1002/chem.201290191] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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21
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Hanson MA, Sutrisno A, Terskikh VV, Baines KM, Huang Y. Solid-State73Ge NMR Spectroscopy of Simple Organogermanes. Chemistry 2012; 18:13770-9. [DOI: 10.1002/chem.201201944] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2012] [Indexed: 11/09/2022]
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22
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Sutrisno A, Terskikh VV, Shi Q, Song Z, Dong J, Ding SY, Wang W, Provost BR, Daff TD, Woo TK, Huang Y. Back Cover: Characterization of Zn-Containing Metal-Organic Frameworks by Solid-State 67Zn NMR Spectroscopy and Computational Modeling (Chem. Eur. J. 39/2012). Chemistry 2012. [DOI: 10.1002/chem.201290171] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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23
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Sutrisno A, Terskikh VV, Shi Q, Song Z, Dong J, Ding SY, Wang W, Provost BR, Daff TD, Woo TK, Huang Y. Characterization of Zn-Containing Metal-Organic Frameworks by Solid-State67Zn NMR Spectroscopy and Computational Modeling. Chemistry 2012; 18:12251-9. [DOI: 10.1002/chem.201201563] [Citation(s) in RCA: 56] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/04/2012] [Indexed: 11/06/2022]
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24
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Sarina S, Zhu H, Zheng Z, Bottle S, Chang J, Ke X, Zhao JC, Huang Y, Sutrisno A, Willans M, Li G. Driving selective aerobic oxidation of alkyl aromatics by sunlight on alcohol grafted metal hydroxides. Chem Sci 2012. [DOI: 10.1039/c2sc20114c] [Citation(s) in RCA: 56] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
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25
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Sutrisno A, Liu L, Xu J, Huang Y. Natural abundance solid-state 67Zn NMR characterization of microporous zinc phosphites and zinc phosphates at ultrahigh magnetic field. Phys Chem Chem Phys 2011; 13:16606-17. [DOI: 10.1039/c1cp20947g] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
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26
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Sutrisno A, Hanson MA, Rupar PA, Terskikh VV, Baines KM, Huang Y. Exploring the limits of 73Ge solid-state NMR spectroscopy at ultrahigh magnetic field. Chem Commun (Camb) 2010; 46:2817-9. [DOI: 10.1039/b926071d] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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27
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Sutrisno A, Lo AY, Tang JA, Dutton JL, Farrar GJ, Ragogna PJ, Zheng S, Autschbach J, Schurko RW. Experimental and theoretical investigations of selenium nuclear magnetic shielding tensors in Se–N heterocycles. CAN J CHEM 2009. [DOI: 10.1139/v09-100] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
A preliminary study involving solid-state 77Se NMR spectroscopy and first principles calculations of 77Se NMR parameters in Se–N heterocycles is reported. 77Se CP/MAS NMR spectra of the ring systems reveal expansive selenium chemical shift (CS) tensors, which are extremely sensitive to molecular geometry, symmetry, ligand substitution, and intermolecular contacts. For systems with known crystal structures, hybrid density functional theory (DFT) calculations of selenium nuclear magnetic shielding (NMS) tensors were carried out, and tensor orientations in the molecular frames examined. Additional DFT calculations of selenium NMS tensors are presented, along with a detailed analysis of pairs of occupied and virtual molecular orbitals that give rise to the Se NMS tensors. A new naturalized local molecular orbital (NLMO) analysis under the same DFT framework is also discussed. Collectively, the NMR data and first principles calculations provide understanding of the influences of electronic structure, bonding, and intermolecular interactions on the selenium NMS tensors, allowing for (i) prediction of unknown molecular structures and (ii) insight into the positions of the stereochemically active selenium lone pairs.
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Affiliation(s)
- Andre Sutrisno
- Department of Chemistry and Biochemistry, University of Windsor, Windsor, ON N9B 3P4, Canada
- Department of Chemistry, The University of Western Ontario, London, ON N6A 5B7, Canada
- Department of Chemistry, The State University of New York, Buffalo, NY 14260-3000, USA
| | - Andy Y.H. Lo
- Department of Chemistry and Biochemistry, University of Windsor, Windsor, ON N9B 3P4, Canada
- Department of Chemistry, The University of Western Ontario, London, ON N6A 5B7, Canada
- Department of Chemistry, The State University of New York, Buffalo, NY 14260-3000, USA
| | - Joel A. Tang
- Department of Chemistry and Biochemistry, University of Windsor, Windsor, ON N9B 3P4, Canada
- Department of Chemistry, The University of Western Ontario, London, ON N6A 5B7, Canada
- Department of Chemistry, The State University of New York, Buffalo, NY 14260-3000, USA
| | - Jason L. Dutton
- Department of Chemistry and Biochemistry, University of Windsor, Windsor, ON N9B 3P4, Canada
- Department of Chemistry, The University of Western Ontario, London, ON N6A 5B7, Canada
- Department of Chemistry, The State University of New York, Buffalo, NY 14260-3000, USA
| | - Gregg J. Farrar
- Department of Chemistry and Biochemistry, University of Windsor, Windsor, ON N9B 3P4, Canada
- Department of Chemistry, The University of Western Ontario, London, ON N6A 5B7, Canada
- Department of Chemistry, The State University of New York, Buffalo, NY 14260-3000, USA
| | - Paul J. Ragogna
- Department of Chemistry and Biochemistry, University of Windsor, Windsor, ON N9B 3P4, Canada
- Department of Chemistry, The University of Western Ontario, London, ON N6A 5B7, Canada
- Department of Chemistry, The State University of New York, Buffalo, NY 14260-3000, USA
| | - Shaohui Zheng
- Department of Chemistry and Biochemistry, University of Windsor, Windsor, ON N9B 3P4, Canada
- Department of Chemistry, The University of Western Ontario, London, ON N6A 5B7, Canada
- Department of Chemistry, The State University of New York, Buffalo, NY 14260-3000, USA
| | - Jochen Autschbach
- Department of Chemistry and Biochemistry, University of Windsor, Windsor, ON N9B 3P4, Canada
- Department of Chemistry, The University of Western Ontario, London, ON N6A 5B7, Canada
- Department of Chemistry, The State University of New York, Buffalo, NY 14260-3000, USA
| | - Robert W. Schurko
- Department of Chemistry and Biochemistry, University of Windsor, Windsor, ON N9B 3P4, Canada
- Department of Chemistry, The University of Western Ontario, London, ON N6A 5B7, Canada
- Department of Chemistry, The State University of New York, Buffalo, NY 14260-3000, USA
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28
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Sutrisno A, Terskikh VV, Huang Y. A natural abundance33S solid-state NMR study of layered transition metaldisulfides at ultrahigh magnetic field. Chem Commun (Camb) 2009:186-8. [DOI: 10.1039/b817017g] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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29
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Dutton JL, Sutrisno A, Schurko RW, Ragogna PJ. Synthesis and characterization of cationic selenium–nitrogen heterocycles from tert-butyl-DAB (DAB = 1,4-di-tert-butyl-1,3-diazabutadiene) and SeX4via the reductive elimination of X2 (X = Cl, Br): a distinct contrast with tellurium. Dalton Trans 2008:3470-7. [DOI: 10.1039/b719779a] [Citation(s) in RCA: 36] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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30
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Sutrisno A, Ueda M, Abe Y, Nakazawa M, Miyatake K. A chitinase with high activity toward partially N-acetylated chitosan from a new, moderately thermophilic, chitin-degrading bacterium, Ralstonia sp. A-471. Appl Microbiol Biotechnol 2004; 63:398-406. [PMID: 12802528 DOI: 10.1007/s00253-003-1351-2] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2003] [Revised: 04/09/2003] [Accepted: 04/16/2003] [Indexed: 11/30/2022]
Abstract
A moderately thermophilic bacterium, strain A-471, capable of degrading chitin was isolated from a composting system of chitin-containing waste. Analysis of the 16S rDNA sequence revealed that the bacterium belongs to the genus Ralstonia. A thermostable chitinase A ( Ra-ChiA) was purified from culture fluid of the bacterium grown in colloidal chitin medium. Purification of the enzyme was achieved mainly by exploiting its binding to the colloidal chitin. The molecular mass of the enzyme was estimated to be 70 kDa and the isoelectric point approximately 4.7. N-terminal amino acid sequencing revealed a sequence of ADPYLKVAYYP, which had high homology (66% identity) with that of chitinase A1 from Bacillus circulans WL-12. The pH and temperature optima were determined to be 5.0 and 70 degrees C, respectively. The enzyme was classified as a retaining glycosyl hydrolase and was most active against partially N-acetylated chitosans. Its activities towards the partially N-acetylated chitosans, i.e. chitosan 7B, chitosan 8B, and chitosan 9B, were about 11-fold, 9-fold, and 5-fold higher than towards colloidal chitin, respectively. Ra-ChiA cleaved (GlcNAc)6 almost exclusively into (GlcNAc)2. Activation of Ra-ChiA was observed by the addition of 1 mM Cu2+, Mn2+, Ca2+, or Mg2+. Degradation of the partially N-acetylated chitosan produced oligosaccharides with a degree of polymerization ranging from 1-8; these are products that offer potential application for functional oligosaccharide production.
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Affiliation(s)
- A Sutrisno
- Laboratory of Biocycle Engineering, Graduate School of Agriculture and Biological Sciences, Osaka Prefecture University, Sakai, 599-8531 Osaka, Japan
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31
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Sutrisno A, Ueda M, Inui H, Kawaguchi T, Nakano Y, Arai M, Miyatake K. Expression of a gene encoding chitinase (pCA 8 ORF) from Aeromonas sp. no. 10S-24 in Escherichia coli and enzyme characterization. J Biosci Bioeng 2001; 91:599-602. [PMID: 16233047 DOI: 10.1263/jbb.91.599] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2000] [Accepted: 03/17/2001] [Indexed: 05/04/2023]
Abstract
A gene encoding chitinase from Aeromonas sp. no. 10S-24 was expressed using pTrc99A in Escherichia coli JM 105 which yielded a 5-fold higher activity than when pUC19 was used. Three different truncated enzymes (SA-1, SA-2 and SA-3) were obtained after purification. Their isoelectric points were 7.0, 6.9, and 6.7, respectively. The enzymes showed two optimum pHs, 4.0 and 7.0, when incubated with ethylene glycol chitin as the substrate, and were stable over a wide pH range (3.0-9.0). The optimum temperature was 60 degrees C and the enzymes were stable up to 50 degrees C. The chitinases exhibited wide substrate specificities for chitin-related compounds.
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Affiliation(s)
- A Sutrisno
- Department of Applied Biological Chemistry, College of Agriculture, Osaka Prefecture University, 1-1 Gakuen-cho, Sakai, Osaka 599-8531, Japan
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