301
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Gómez-Milán E, de Haro C, Sánchez-Muros MJ. Annual variations of the plasmatic levels of glucose and amino acid and daily changes under different natural conditions of temperature and photoperiod in Gilthead Sea bream (Sparus aurata, L.). FISH PHYSIOLOGY AND BIOCHEMISTRY 2011; 37:583-592. [PMID: 21174148 DOI: 10.1007/s10695-010-9460-1] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/07/2010] [Accepted: 12/07/2010] [Indexed: 05/30/2023]
Abstract
Daily and annual changes in the plasmatic glucose and amino acid concentration have been determined in Sparus aurata L. Fish (average weight 330 g) were kept in cages under natural conditions of temperature and photoperiod and fed with a commercial diet. The months studied were chosen to establish whether there is any influence on the plasmatic glucose and amino acid concentration due to the change in temperature and photoperiod (equal photoperiod and different temperature, March and October; different photoperiod and equal temperature, May and November; and different photoperiod and temperature, June and January). To study the daily profile of glucose and amino acids concentrations, blood was extracted from six fish every 3 h during 24 h. Annual changes were determined as the average of the samples obtained during 1 day. Results show an annual rhythm with acrophase in June with a positive correlation with photoperiod for glucose and amino acids and with temperature only for amino acids. Daily profiles are rhythmical with a period of 24 h except in November with a period of 8 h for amino acids.
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Affiliation(s)
- E Gómez-Milán
- Department of Applied Biology, Cite 2B, University of Almería, Carretera de Sacramento s/n, 04120 Almería, Spain
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302
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Application of an unusual ninhydrin-based reaction for the indirect chiral resolution of d,l-penicillamine. Talanta 2011; 85:1783-5. [DOI: 10.1016/j.talanta.2011.07.007] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/05/2011] [Revised: 06/21/2011] [Accepted: 07/05/2011] [Indexed: 11/17/2022]
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303
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Tao L, Zhou H, Guo X, Long R, Zhu Y, Cheng W. Contribution of exopeptidases to formation of nonprotein nitrogen during ensiling of alfalfa. J Dairy Sci 2011; 94:3928-35. [DOI: 10.3168/jds.2010-3752] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/22/2010] [Accepted: 04/25/2011] [Indexed: 11/19/2022]
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304
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Fujii A, Ohmukai Y, Maruyama T, Sotani T, Matsuyama H. Preparation of DNA capsules cross-linked through NeutrAvidin–biotin interaction. Colloids Surf A Physicochem Eng Asp 2011. [DOI: 10.1016/j.colsurfa.2011.05.021] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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305
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Li Z, Chang S, Lin L, Li Y, An Q. A colorimetric assay of 1-aminocyclopropane-1-carboxylate (ACC) based on ninhydrin reaction for rapid screening of bacteria containing ACC deaminase. Lett Appl Microbiol 2011; 53:178-85. [DOI: 10.1111/j.1472-765x.2011.03088.x] [Citation(s) in RCA: 63] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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306
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Hernández-Cassou S, Saurina J. Derivatization strategies for the determination of biogenic amines in wines by chromatographic and electrophoretic techniques. J Chromatogr B Analyt Technol Biomed Life Sci 2011; 879:1270-81. [DOI: 10.1016/j.jchromb.2010.11.020] [Citation(s) in RCA: 49] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/11/2010] [Revised: 11/09/2010] [Accepted: 11/23/2010] [Indexed: 12/22/2022]
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307
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Huang Z, Zhang J, Wang NX. The study of Friedel–Crafts alkylation reaction of thiophenes with glyoxylate imine catalyzed by Fe(III): an easy access to α-aminoesters. Tetrahedron 2011. [DOI: 10.1016/j.tet.2011.01.039] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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308
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Vidal BC, Rausch KD, Tumbleson ME, Singh V. Corn Endosperm Fermentation Using Endogenous Amino Nitrogen Generated by a Fungal Protease. Cereal Chem 2011. [DOI: 10.1094/cchem-04-10-0070] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Affiliation(s)
- Bernardo C. Vidal
- Agricultural and Biological Engineering, University of Illinois, Urbana-Champaign, Urbana, IL 61801
| | - Kent D. Rausch
- Agricultural and Biological Engineering, University of Illinois, Urbana-Champaign, Urbana, IL 61801
| | - M. E. Tumbleson
- Agricultural and Biological Engineering, University of Illinois, Urbana-Champaign, Urbana, IL 61801
| | - Vijay Singh
- Agricultural and Biological Engineering, University of Illinois, Urbana-Champaign, Urbana, IL 61801
- Corresponding author. Phone: 217-333-9510. Fax: 217-244-0323. E-mail:
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309
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Kang SU, Lubec G. Determination of in-gel protein concentration by a ninhydrin-based method. Proteomics 2011; 11:481-4. [DOI: 10.1002/pmic.201000388] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/25/2010] [Revised: 10/19/2010] [Accepted: 11/03/2010] [Indexed: 11/10/2022]
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310
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Huang Z, Zhang J, Zhou Y, Wang NX. Enantioselective Friedel-Crafts Alkylation of Thiophenes with Ethyl Glyoxylate: Easy Access to Chiral Secondary Alcohols. European J Org Chem 2010. [DOI: 10.1002/ejoc.201001455] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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311
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Budhavaram NK, Miller JA, Shen Y, Barone JR. Protein substitution affects glass transition temperature and thermal stability. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2010; 58:9549-9555. [PMID: 20707306 DOI: 10.1021/jf101010w] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/29/2023]
Abstract
When proteins are removed from their native state they suffer from two deficiencies: (1) glassy behavior with glass transition temperatures (Tg) well above room temperature and (2) thermal instability. The glassy behavior originates in multiple hydrogen bonds between amino acids on adjacent protein molecules. Proteins, like most biopolymers, are thermally unstable. Substituting ovalbumin with linear and cyclic substituents using a facile nucleophilic addition reaction can affect Tg and thermal stability. More hydrophobic linear substituents lowered Tg by interrupting intermolecular interactions and increasing free volume. More hydrophilic and cyclic substituents increased thermal stability by increasing intermolecular interactions. In some cases, substituents instituted cross-linking between protein chains that enhanced thermal stability. Internal plasticization using covalent substitution and external plasticization using low molecular weight polar liquids show the same protein structural changes and a signature of plasticization is identified.
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Affiliation(s)
- Naresh K Budhavaram
- Biological Systems Engineering Department, Virginia Tech, Blacksburg, Virginia 24061, USA
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312
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Moore JC, DeVries JW, Lipp M, Griffiths JC, Abernethy DR. Total Protein Methods and Their Potential Utility to Reduce the Risk of Food Protein Adulteration. Compr Rev Food Sci Food Saf 2010; 9:330-357. [DOI: 10.1111/j.1541-4337.2010.00114.x] [Citation(s) in RCA: 126] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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313
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Subramanian A, Rodriguez-Saona L. Chemical and instrumental approaches to cheese analysis. ADVANCES IN FOOD AND NUTRITION RESEARCH 2010; 59:167-213. [PMID: 20610176 DOI: 10.1016/s1043-4526(10)59005-3] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/29/2023]
Abstract
Overcoming the complexity of cheese matrix to reliably analyze cheese composition, flavor, and ripening changes has been a challenge. Several sample isolation or fractionation methods, chemical and enzymatic assays, and instrumental methods have been developed over the decades. While some of the methods are well established standard methods, some still need to be researched and improved. This chapter reviews the chemical and instrumental methods available to determine cheese composition and monitor biochemical events (e.g., glycolysis, lipolysis, and proteolysis) during cheese ripening that lead to the formation of cheese flavor. Chemical and enzymatic methods available for analysis of cheese composition (fat, protein, lactose, salt, nitrogen content, moisture, etc.) are presented. Electrophoretic, chromatographic, and spectroscopic techniques are also reviewed in the light of their application to monitor cheese ripening and flavor compounds. Novel instrumental methods based on Fourier-transform infrared spectroscopy that are currently being researched and applied to cheese analysis are introduced.
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Affiliation(s)
- Anand Subramanian
- Department of Food Science and Technology, The Ohio State University, Columbus, Ohio, USA
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314
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Friedman M. Origin, Microbiology, Nutrition, and Pharmacology of D-Amino Acids. Chem Biodivers 2010; 7:1491-530. [DOI: 10.1002/cbdv.200900225] [Citation(s) in RCA: 142] [Impact Index Per Article: 10.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
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315
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Chertok B, David AE, Yang VC. Polyethyleneimine-modified iron oxide nanoparticles for brain tumor drug delivery using magnetic targeting and intra-carotid administration. Biomaterials 2010; 31:6317-24. [PMID: 20494439 DOI: 10.1016/j.biomaterials.2010.04.043] [Citation(s) in RCA: 229] [Impact Index Per Article: 16.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2010] [Accepted: 04/21/2010] [Indexed: 10/19/2022]
Abstract
This study aimed to examine the applicability of polyethyleneimine (PEI)-modified magnetic nanoparticles (GPEI) as a potential vascular drug/gene carrier to brain tumors. In vitro, GPEI exhibited high cell association and low cell toxicity--properties which are highly desirable for intracellular drug/gene delivery. In addition, a high saturation magnetization of 93 emu/g Fe was expected to facilitate magnetic targeting of GPEI to brain tumor lesions. However, following intravenous administration, GPEI could not be magnetically accumulated in tumors of rats harboring orthotopic 9L-gliosarcomas due to its poor pharmacokinetic properties, reflected by a negligibly low plasma AUC of 12 +/- 3 microg Fe/ml min. To improve "passive" GPEI presentation to brain tumor vasculature for subsequent "active" magnetic capture, we examined the intra-carotid route as an alternative for nanoparticle administration. Intra-carotid administration in conjunction with magnetic targeting resulted in 30-fold (p=0.002) increase in tumor entrapment of GPEI compared to that seen with intravenous administration. In addition, magnetic accumulation of cationic GPEI (zeta-potential = + 37.2 mV) in tumor lesions was 5.2-fold higher (p=0.004) than that achieved with slightly anionic G100 (zeta-potential= -12 mV) following intra-carotid administration, while no significant accumulation difference was detected between the two types of nanoparticles in the contra-lateral brain (p=0.187). These promising results warrant further investigation of GPEI as a potential cell-permeable, magnetically-responsive platform for brain tumor delivery of drugs and genes.
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Affiliation(s)
- Beata Chertok
- Department of Pharmaceutical Sciences, College of Pharmacy, University of Michigan, Ann Arbor, MI 48109-1065, USA
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316
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Kabir-ud-Din, Siddiqui US. Catalytic role of gemini surfactant micelles in the ninhydrin-L-isoleucine reaction. COLLOID JOURNAL 2010. [DOI: 10.1134/s1061933x10010035] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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317
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McCall AS, Kraft S, Edelhauser HF, Kidder GW, Lundquist RR, Bradshaw HE, Dedeic Z, Dionne MJC, Clement EM, Conrad GW. Mechanisms of corneal tissue cross-linking in response to treatment with topical riboflavin and long-wavelength ultraviolet radiation (UVA). Invest Ophthalmol Vis Sci 2010; 51:129-38. [PMID: 19643975 PMCID: PMC2869064 DOI: 10.1167/iovs.09-3738] [Citation(s) in RCA: 195] [Impact Index Per Article: 13.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2009] [Revised: 04/30/2009] [Accepted: 10/02/2009] [Indexed: 11/24/2022] Open
Abstract
PURPOSE Treatment of de-epithelialized human corneas with riboflavin (RF) + long-wavelength ultraviolet light (UVA; RFUVA) increases corneal stroma tensile strength significantly. RFUVA treatment retards the progression of keratoconus, perhaps by cross-linking of collagen molecules, but exact molecular mechanisms remain unknown. Research described here tested possible chemical mechanisms of cross-linking. METHODS Corneas of rabbits and spiny dogfish sharks were de-epithelialized mechanically, subjected to various chemical pretreatments, exposed to RFUVA, and then subjected to destructive tensile stress measurements. Tensile strength was quantified with a digital force gauge to measure degree of tissue cross-linking. RESULTS For both rabbit and shark corneas, RFUVA treatment causes significant cross-linking by mechanism(s) that can be blocked by the presence of sodium azide. Conversely, such cross-linking is greatly enhanced in the presence of deuterium oxide (D(2)O), even when RF is present at only one tenth the currently used clinical concentrations. Blocking carbonyl groups preexisting in the stroma with 2,4-dinitrophenylhydrazide or hydroxylamine blocks essentially all corneal cross-linking. In contrast, blocking free amine groups preexisting in the stroma with acetic anhydride or ethyl acetimidate does not affect RFUVA corneal cross-linking. When both carbonyl groups are blocked and singlet oxygen is quenched, no RFUVA cross-linking occurs, indicating the absence of other cross-linking mechanisms. CONCLUSIONS RFUVA catalyzes cross-linking reactions that require production of singlet oxygen ((1)O(2)), whose half-life is extended by D(2)O. Carbonyl-based cross-linking reactions dominate in the corneal stroma, but other possible reaction schemes are proposed. The use of D(2)O as solution media for RF would enable concentration decreases or significant strength enhancement in treated corneas.
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Affiliation(s)
- A Scott McCall
- Division of Biology, Kansas State University, Manhattan, Kansas 66506-4901, USA.
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318
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319
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Kasman LM, Barua S, Lu P, Rege K, Voelkel-Johnson C. Polymer-enhanced adenoviral transduction of CAR-negative bladder cancer cells. Mol Pharm 2009; 6:1612-9. [PMID: 19655763 DOI: 10.1021/mp9000958] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Abstract
The application of adenoviral gene therapy for cancer is limited by immune clearance of the virus as well as poor transduction efficiency, since the protein used for viral entry (CAR) serves physiological functions in adhesion and is frequently decreased among cancer cells. Cationic polymers have been used to enhance adenoviral gene delivery, but novel polymers with low toxicity are needed to realize this approach. We recently identified polymers that were characterized by high transfection efficiency of plasmid DNA and a low toxicity profile. In this study we evaluated the novel cationic polymer EGDE-3,3' for its potential to increase adenoviral transduction of the CAR-negative bladder cancer cell line TCCSUP. The amount of adenovirus required to transduce 50-60% of the cells was reduced 100-fold when Ad.GFP was preincubated with the EGDE-3,3' polymer. Polyethyleneimine (pEI), a positively charged polymer currently used as a standard for enhancing adenoviral transduction, also increased infectivity, but transgene expression was consistently higher with EGDE-3,3'. In addition, EGDE-3,3'-supplemented transduction of an adenovirus expressing an apoptosis inducing transgene, Ad.GFP-TRAIL, significantly enhanced the amount of cell death. Thus, our results indicate that novel biocompatible polymers may be useful in improving the delivery of adenoviral gene therapy.
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Affiliation(s)
- Laura M Kasman
- Department of Microbiology, Medical University of South Carolina, Charleston, South Carolina, USA
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320
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Measurement of ninhydrin reactive nitrogen influx into gravesoil during aboveground and belowground carcass (Sus domesticus) decomposition. Forensic Sci Int 2009; 193:37-41. [DOI: 10.1016/j.forsciint.2009.08.016] [Citation(s) in RCA: 40] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/26/2009] [Revised: 08/11/2009] [Accepted: 08/27/2009] [Indexed: 11/17/2022]
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321
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Zu Y. Molecular and nanoparticle postcolumn reagents for assay of low-molecular-mass biothiols using high-performance liquid chromatography. J Chromatogr B Analyt Technol Biomed Life Sci 2009; 877:3358-65. [DOI: 10.1016/j.jchromb.2009.04.031] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/13/2009] [Revised: 04/15/2009] [Accepted: 04/17/2009] [Indexed: 12/01/2022]
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322
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Jelly R, Patton EL, Lennard C, Lewis SW, Lim () KF. The detection of latent fingermarks on porous surfaces using amino acid sensitive reagents: A review. Anal Chim Acta 2009; 652:128-42. [DOI: 10.1016/j.aca.2009.06.023] [Citation(s) in RCA: 85] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2009] [Revised: 06/10/2009] [Accepted: 06/10/2009] [Indexed: 11/25/2022]
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323
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Kokai LE, Lin YC, Oyster NM, Marra KG. Diffusion of soluble factors through degradable polymer nerve guides: Controlling manufacturing parameters. Acta Biomater 2009; 5:2540-50. [PMID: 19369123 DOI: 10.1016/j.actbio.2009.03.009] [Citation(s) in RCA: 79] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2008] [Revised: 02/09/2009] [Accepted: 03/09/2009] [Indexed: 11/30/2022]
Abstract
Nerve guides are cylindrical conduits of either biologically based or synthetic materials that are used to bridge nerve defects. While it is well known that a critical aspect of nerve regeneration is the delivery of oxygen and nutrients to the surviving nerve tissue, several guide parameters that determine the permeability of nerve guides to nutrients are often overlooked. We have reproducibly manufactured poly(caprolactone) (PCL) nerve guides of tailored porosity percentage, wall thickness and pore diameter through a dip-coating/salt-leaching technique. In this study, these three parameters were varied to measure the response of glucose and lysozyme diffusion through the guide wall. In addition, nerve guide permeability following protein fouling studies was examined. Based on the results from this study, it was determined that at high porosity percentages (80%), decreasing the pore diameter (10-38microm) was a measurable method of decreasing the lysozyme permeability of PCL nerve guides while not creating a loss of glucose permeability. PCL fouling studies were used to fine-tune the desirable nerve guide wall thickness. Results indicated that nerve guides 0.6mm thick decreased the loss of lysozyme to almost 10% without significantly diminishing glucose (nutrient) permeability. These results will be utilized to optimize nerve guide parameters for future in vivo applications.
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Affiliation(s)
- Lauren E Kokai
- Department of Bioengineering, University of Pittsburgh, Pittsburgh, PA 15261, USA
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324
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A Novel, Fast and Efficient One-Pot Four-Component Procedure for Preparation of Some Spiro[indeno[1,2-b]quinoxaline-11,3'-pyrrolizidine]. B KOREAN CHEM SOC 2009. [DOI: 10.5012/bkcs.2009.30.8.1877] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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325
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Argirova MD, Stefanova ID, Krustev AD, Turiiski VI. Testing biological activity of model Maillard reaction products: studies on gastric smooth muscle tissues. Amino Acids 2009; 38:797-803. [DOI: 10.1007/s00726-009-0286-z] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2009] [Accepted: 03/25/2009] [Indexed: 10/20/2022]
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326
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Barua S, Joshi A, Banerjee A, Matthews D, Sharfstein ST, Cramer SM, Kane RS, Rege K. Parallel synthesis and screening of polymers for nonviral gene delivery. Mol Pharm 2009; 6:86-97. [PMID: 19102694 DOI: 10.1021/mp800151j] [Citation(s) in RCA: 50] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
Abstract
We describe the parallel synthesis and in vitro evaluation of a cationic polymer library for the discovery of nonviral gene delivery vectors. The library was synthesized based on the ring-opening polymerization reaction between epoxide groups of diglycidyl ethers and the amines of (poly)amines. Parallel screening of soluble library constituents led to the identification of lead polymers with high DNA-binding efficacies. Transfection efficacies of lead polymers were evaluated using PC3-PSMA human prostate cancer cells and murine osteoblasts in the absence and presence of serum. In vitro experiments resulted in the identification of a candidate polymer that demonstrated significantly higher transfection efficacies and lower cytotoxicities than poly(ethyleneimine) (pEI), the current standard for polymeric transfection agents. In addition, polymers that demonstrated moderately higher and comparable transfection efficacies with respect to pEI were also identified. Our results demonstrate that high-throughput synthesis and screening of polymers is a powerful approach for the identification of novel nonviral gene delivery agents.
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Affiliation(s)
- Sutapa Barua
- Department of Chemical Engineering, Arizona State University, Tempe, Arizona 85287-6006, USA
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327
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Encapsulation of a proteolytically active novel bioproduct; controlling the release of proteinous components. FOOD AND BIOPRODUCTS PROCESSING 2009. [DOI: 10.1016/j.fbp.2008.03.003] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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328
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Zhu Z, Sathitsuksanoh N, Percival Zhang YH. Direct quantitative determination of adsorbed cellulase on lignocellulosic biomass with its application to study cellulase desorption for potential recycling. Analyst 2009; 134:2267-72. [DOI: 10.1039/b906065k] [Citation(s) in RCA: 89] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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329
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Devi TU, Lawrence N, Babu RR, Ramamurthi K, Bhagavannarayana G. Growth of ninhydrin single crystal and its characterization. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2009; 71:1667-1672. [PMID: 18723388 DOI: 10.1016/j.saa.2008.06.034] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/01/2007] [Revised: 06/16/2008] [Accepted: 06/23/2008] [Indexed: 05/26/2023]
Abstract
A novel organic nonlinear optical crystal ninhydrin having good optical quality was grown by solution technique using aqua solution. The quality of the crystal was also examined by high-resolution X-ray diffraction study. Solubility studies were made at different temperatures. Functional groups present in the grown material were identified from the vibrational frequencies of recorded FTIR spectrum. Transmittance of the crystal was recorded using the UV-vis-NIR spectrophotometer. From the thermal analysis it was observed that the material exhibits single sharp melting point. The fluorescence spectrum of ninhydrin was recorded. The Vicker's microhardness values were measured for the grown crystal. Second harmonic generation conversion efficiency estimated using Kurtz and Perry method is about five times that of KDP.
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Affiliation(s)
- T Uma Devi
- Department of Physics, Cauvery College for Women, Annamalainagar, Tiruchirappalli 620018, India.
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330
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Chen S, Osaka A, Hayakawa S, Tsuru K, Fujii E, Kawabata K. Novel One-pot Sol–Gel Preparation of Amino-functionalized Silica Nanoparticles. CHEM LETT 2008. [DOI: 10.1246/cl.2008.1170] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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331
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Arayne MS, Sultana N, Siddiqui FA, Mirza AZ, Zuberi MH. Spectrophotometric techniques to determine tranexamic acid: Kinetic studies using ninhydrin and direct measuring using ferric chloride. J Mol Struct 2008. [DOI: 10.1016/j.molstruc.2008.04.026] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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332
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Silva SS, Motta A, Rodrigues MT, Pinheiro AFM, Gomes ME, Mano JF, Reis RL, Migliaresi C. Novel Genipin-Cross-Linked Chitosan/Silk Fibroin Sponges for Cartilage Engineering Strategies. Biomacromolecules 2008; 9:2764-74. [DOI: 10.1021/bm800874q] [Citation(s) in RCA: 210] [Impact Index Per Article: 13.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Affiliation(s)
- Simone S. Silva
- 3B’s Research Group−Biomaterials, Biodegradables, and Biomimetics, Department of Polymer Engineering, University of Minho, Headquarters of the European Institute of Excellence on Tissue Engineering and Regenerative Medicine, AvePark, Zona Industrial da Gandra, 4806-909 Caldas das Taipas, Guimarães, Portugal, Institute for Biotechnology and Bioengineering (IBB), PT Government Associated Laboratory, Braga, Portugal, and Department of Materials Engineering and Industrial Technologies and INSTM Research Unit
| | - Antonella Motta
- 3B’s Research Group−Biomaterials, Biodegradables, and Biomimetics, Department of Polymer Engineering, University of Minho, Headquarters of the European Institute of Excellence on Tissue Engineering and Regenerative Medicine, AvePark, Zona Industrial da Gandra, 4806-909 Caldas das Taipas, Guimarães, Portugal, Institute for Biotechnology and Bioengineering (IBB), PT Government Associated Laboratory, Braga, Portugal, and Department of Materials Engineering and Industrial Technologies and INSTM Research Unit
| | - Márcia T. Rodrigues
- 3B’s Research Group−Biomaterials, Biodegradables, and Biomimetics, Department of Polymer Engineering, University of Minho, Headquarters of the European Institute of Excellence on Tissue Engineering and Regenerative Medicine, AvePark, Zona Industrial da Gandra, 4806-909 Caldas das Taipas, Guimarães, Portugal, Institute for Biotechnology and Bioengineering (IBB), PT Government Associated Laboratory, Braga, Portugal, and Department of Materials Engineering and Industrial Technologies and INSTM Research Unit
| | - Ana F. M. Pinheiro
- 3B’s Research Group−Biomaterials, Biodegradables, and Biomimetics, Department of Polymer Engineering, University of Minho, Headquarters of the European Institute of Excellence on Tissue Engineering and Regenerative Medicine, AvePark, Zona Industrial da Gandra, 4806-909 Caldas das Taipas, Guimarães, Portugal, Institute for Biotechnology and Bioengineering (IBB), PT Government Associated Laboratory, Braga, Portugal, and Department of Materials Engineering and Industrial Technologies and INSTM Research Unit
| | - Manuela E. Gomes
- 3B’s Research Group−Biomaterials, Biodegradables, and Biomimetics, Department of Polymer Engineering, University of Minho, Headquarters of the European Institute of Excellence on Tissue Engineering and Regenerative Medicine, AvePark, Zona Industrial da Gandra, 4806-909 Caldas das Taipas, Guimarães, Portugal, Institute for Biotechnology and Bioengineering (IBB), PT Government Associated Laboratory, Braga, Portugal, and Department of Materials Engineering and Industrial Technologies and INSTM Research Unit
| | - João F. Mano
- 3B’s Research Group−Biomaterials, Biodegradables, and Biomimetics, Department of Polymer Engineering, University of Minho, Headquarters of the European Institute of Excellence on Tissue Engineering and Regenerative Medicine, AvePark, Zona Industrial da Gandra, 4806-909 Caldas das Taipas, Guimarães, Portugal, Institute for Biotechnology and Bioengineering (IBB), PT Government Associated Laboratory, Braga, Portugal, and Department of Materials Engineering and Industrial Technologies and INSTM Research Unit
| | - Rui L. Reis
- 3B’s Research Group−Biomaterials, Biodegradables, and Biomimetics, Department of Polymer Engineering, University of Minho, Headquarters of the European Institute of Excellence on Tissue Engineering and Regenerative Medicine, AvePark, Zona Industrial da Gandra, 4806-909 Caldas das Taipas, Guimarães, Portugal, Institute for Biotechnology and Bioengineering (IBB), PT Government Associated Laboratory, Braga, Portugal, and Department of Materials Engineering and Industrial Technologies and INSTM Research Unit
| | - Claudio Migliaresi
- 3B’s Research Group−Biomaterials, Biodegradables, and Biomimetics, Department of Polymer Engineering, University of Minho, Headquarters of the European Institute of Excellence on Tissue Engineering and Regenerative Medicine, AvePark, Zona Industrial da Gandra, 4806-909 Caldas das Taipas, Guimarães, Portugal, Institute for Biotechnology and Bioengineering (IBB), PT Government Associated Laboratory, Braga, Portugal, and Department of Materials Engineering and Industrial Technologies and INSTM Research Unit
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333
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Sotgia S, Zinellu A, Pisanu E, Pinna GA, Deiana L, Carru C. Enantiomeric reversed-phase high-performance liquid chromatography resolution of d-/l-penicillamine after spirocyclization with ninhydrin and by using copper(II)-l-proline complex as a chiral selector in the mobile phase. J Chromatogr A 2008; 1205:90-3. [DOI: 10.1016/j.chroma.2008.08.021] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/20/2008] [Revised: 08/04/2008] [Accepted: 08/07/2008] [Indexed: 11/29/2022]
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334
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Friedman M, Levin CE. Review of methods for the reduction of dietary content and toxicity of acrylamide. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2008; 56:6113-6140. [PMID: 18624452 DOI: 10.1021/jf0730486] [Citation(s) in RCA: 163] [Impact Index Per Article: 10.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/26/2023]
Abstract
Potentially toxic acrylamide is largely derived from heat-induced reactions between the amino group of the free amino acid asparagine and carbonyl groups of glucose and fructose in cereals, potatoes, and other plant-derived foods. This overview surveys and consolidates the following dietary aspects of acrylamide: distribution in food originating from different sources; consumption by diverse populations; reduction of the acrylamide content in the diet; and suppression of adverse effects in vivo. Methods to reduce adverse effects of dietary acrylamide include (a) selecting potato, cereal, and other plant varieties for dietary use that contain low levels of the acrylamide precursors, namely, asparagine and glucose; (b) removing precursors before processing; (c) using the enzyme asparaginase to hydrolyze asparagine to aspartic acid; (d) selecting processing conditions (pH, temperature, time, processing and storage atmosphere) that minimize acrylamide formation; (e) adding food ingredients (acidulants, amino acids, antioxidants, nonreducing carbohydrates, chitosan, garlic compounds, protein hydrolysates, proteins, metal salts) that have been reported to prevent acrylamide formation; (f) removing/trapping acrylamide after it is formed with the aid of chromatography, evaporation, polymerization, or reaction with other food ingredients; and (g) reducing in vivo toxicity. Research needs are suggested that may further facilitate reducing the acrylamide burden of the diet. Researchers are challenged to (a) apply the available methods and to minimize the acrylamide content of the diet without adversely affecting the nutritional quality, safety, and sensory attributes, including color and flavor, while maintaining consumer acceptance; and (b) educate commercial and home food processors and the public about available approaches to mitigating undesirable effects of dietary acrylamide.
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Affiliation(s)
- Mendel Friedman
- Western Regional Research Center, Agricultural Research Service, U.S. Department of Agriculture, Albany, California 94710, USA.
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335
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Formation and immunological properties of aldehyde-derived protein adducts following alcohol consumption. Methods Mol Biol 2008; 447:235-57. [PMID: 18369923 DOI: 10.1007/978-1-59745-242-7_17] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
Most ingested ethanol is eliminated from the body through oxidative metabolism in the liver. Alcohol dehydrogenase is the enzyme that is most important in the oxidation of ethanol to acetaldehyde. However, it has also been demonstrated that cytochrome P4502E1 also can contribute to this process. However, this is not the only aldehyde that is produced after chronic ethanol consumption because oxidative stress and lipid peroxidation can be induced in the liver, which results in the production of malondialdehyde and 4-hydroxy-2-nonenal. These aldehydes are highly reactive and have the ability to react with (adduct) many macromolecules to alter their structure and play a major role in the derangements of hepatic function. Therefore, the formation of these types of adducts in the liver has been proposed as key events leading to the development and/or progression of alcoholic liver disease. In this chapter, methods for the production and detection of these modified proteins will be discussed.
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336
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Montañez MI, Perez-Inestrosa E, Suau R, Mayorga C, Torres MJ, Blanca M. Dendrimerized Cellulose as a Scaffold for Artificial Antigens with Applications in Drug Allergy Diagnosis. Biomacromolecules 2008; 9:1461-6. [DOI: 10.1021/bm701380a] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Maria I. Montañez
- Department of Organic Chemistry, Faculty of Sciences, University of Malaga, 29071 Malaga, Spain, and Research Unit for Allergic Diseases, “Carlos Haya” Hospital, 29010 Malaga, Spain
| | - Ezequiel Perez-Inestrosa
- Department of Organic Chemistry, Faculty of Sciences, University of Malaga, 29071 Malaga, Spain, and Research Unit for Allergic Diseases, “Carlos Haya” Hospital, 29010 Malaga, Spain
| | - Rafael Suau
- Department of Organic Chemistry, Faculty of Sciences, University of Malaga, 29071 Malaga, Spain, and Research Unit for Allergic Diseases, “Carlos Haya” Hospital, 29010 Malaga, Spain
| | - Cristobalina Mayorga
- Department of Organic Chemistry, Faculty of Sciences, University of Malaga, 29071 Malaga, Spain, and Research Unit for Allergic Diseases, “Carlos Haya” Hospital, 29010 Malaga, Spain
| | - Maria J. Torres
- Department of Organic Chemistry, Faculty of Sciences, University of Malaga, 29071 Malaga, Spain, and Research Unit for Allergic Diseases, “Carlos Haya” Hospital, 29010 Malaga, Spain
| | - Miguel Blanca
- Department of Organic Chemistry, Faculty of Sciences, University of Malaga, 29071 Malaga, Spain, and Research Unit for Allergic Diseases, “Carlos Haya” Hospital, 29010 Malaga, Spain
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337
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Huang J, Weisensee C. Enhancing the Determination of Sulfonic Acids using Anion‐Exchange Chromatography with Post‐Column Derivatization and Spectrometric Detection. J LIQ CHROMATOGR R T 2008. [DOI: 10.1080/10826070701812731] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
Affiliation(s)
- Jinmo Huang
- a Department of Chemistry , The College of New Jersey , Ewing , NJ
| | - Corrie Weisensee
- a Department of Chemistry , The College of New Jersey , Ewing , NJ
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338
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Kulla E, Zuman P. Reactions of orthophthalaldehyde with ammonia and 2-aminoethanol. Org Biomol Chem 2008; 6:3771-80. [DOI: 10.1039/b807714m] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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339
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Fimmen RL, Trouts TD, Richter DD, Vasudevan D. Improved speciation of dissolved organic nitrogen in natural waters: amide hydrolysis with fluorescence derivatization. J Environ Sci (China) 2008; 20:1273-1280. [PMID: 19143355 DOI: 10.1016/s1001-0742(08)62221-4] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
The objective of this study was to improve primary-amine nitrogen (1 degree-N) quantification in dissolved organic matter (DOM) originating from natural waters where inorganic forms of N, which may cause analytical interference, are commonly encountered. Efforts were targeted at elucidating organic-N structural criteria influencing the response of organic amines to known colorimetric and fluorescent reagents and exploring the use of divalent metal-assisted amide hydrolysis in combination with fluorescence analyses. We found that reaction of o-phthaldialdehyde (OPA) with primary amines is significantly influenced by steric factors, whereas fluorescamine (FLU) lacks sensitivity to steric factors and allows for the detection of a larger suite of organic amines, including di- and tri-peptides and sterically hindered 1degree-N. Due to the near quantitative recovery of dissolved peptides with the FLU reagent and lack of analytical response to inorganic nitrogen, we proposed that FLU be utilized for the quantification of primary amine nitrogen. In exploring the application of divalent metal promoted peptide hydrolysis to the analysis of organic forms of nitrogen in DOM, we found that Zn(II) reaction increased the total fraction of organic-N detectable by both OPA and FLU reagents. Zn-hydrolysis improved recovery of organic-N in natural waters from < 5% to 35%. The above method, coupled with standard inorganic-N analyses, allows for enhanced resolution of dissolved organic nitrogen (DON) speciation in natural waters.
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Affiliation(s)
- Ryan L Fimmen
- School of Earth Sciences, The Ohio State University, 125 S. Oval Mall, Columbus, OH 43210, USA.
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340
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Sotgia S, Zinellu A, Pinna GA, Deiana L, Carru C. A new selective pre-column ninhydrin-based derivatization for a RP-HPLC determination of plasma asymmetric dimethyl-L-arginine (ADMA) by fluorescence detection. Amino Acids 2007; 34:677-82. [PMID: 18043861 DOI: 10.1007/s00726-007-0001-x] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2007] [Accepted: 11/07/2007] [Indexed: 11/27/2022]
Abstract
We report a new selective and direct pre-column ninhydrin-based derivatization reaction for determination of plasma ADMA levels. This original derivatization procedure matched to a validated and rapid RP-HPLC method can be a useful alternative to other assays in which time consuming and expensive extraction and/or purification steps are required.
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Affiliation(s)
- Salvatore Sotgia
- Department of Biomedical Sciences, Chair of Clinical Biochemistry, University of Sassari, Viale San Pietro 43/B, 07100 Sassari, Italy.
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341
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Font-Llitjós M, Feliubadaló L, Espino M, Clèries R, Mañas S, Frey IM, Puertas S, Colell G, Palomo S, Aranda J, Visa J, Palacín M, Nunes V. Slc7a9knockout mouse is a good cystinuria model for antilithiasic pharmacological studies. Am J Physiol Renal Physiol 2007; 293:F732-40. [PMID: 17596531 DOI: 10.1152/ajprenal.00121.2007] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
Cystinuria is a hereditary disorder caused by a defect in the apical membrane transport system for cystine and dibasic amino acids in renal proximal tubules and intestine, resulting in recurrent urolithiasis. Mutations in SLC3A1 and SLC7A9 genes, that codify for rBAT/b0,+AT transporter subunits, cause type A and B cystinuria, respectively. In humans, cystinuria treatment is based on the prevention of calculi formation and its dissolution or breakage. Persistent calculi are treated with thiols [i.e., d-penicillamine (DP) and mercaptopropionylglycine (MPG)] for cystine solubilization. We have developed a new protocol with DP to validate our Slc7a9 knockout mouse model for the study of the therapeutic effect of drugs in the treatment of cystine lithiasis. We performed a 5-wk treatment of individually caged lithiasic mutant mice with a previously tested DP dose. To appraise the evolution of lithiasis throughout the treatment a noninvasive indirect method of calculi quantification was developed: calculi mass was quantified by densitometry of X-ray images from cystinuric mice before and after treatment. Urine was collected in metabolic cage experiments to quantify amino acids in DP-treated and nontreated, nonlithiasic mutant mice. We found significant differences between DP-treated and nontreated knockout mice in calculi size and in urinary cystine excretion. Histopathological analysis showed that globally nontreated mutant mice had more severe and diffuse urinary system damage than DP-treated mice. Our results validate the use of this mouse model for testing the efficacy of potential new drugs against cystinuria.
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Affiliation(s)
- Mariona Font-Llitjós
- Medical and Molecular Genetics Center, Institut d'Investigació Biomèdica de Bellvitge, L'Hospitalet de Llobregat, Barcelona, Spain
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342
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Perrett D. From 'protein' to the beginnings of clinical proteomics. Proteomics Clin Appl 2007; 1:720-38. [PMID: 21136729 DOI: 10.1002/prca.200700525] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2007] [Indexed: 02/02/2023]
Abstract
It has taken over 200 years to move from the view that there was a single unique 'protein' to our present understanding that there may be over a million proteins in the human body. This review details the technological developments that led to this increase in knowledge especially in the area of clinical biochemistry. Simple techniques such as total protein assays allowed the quantitation of the amounts of protein in blood plasma and serum. These techniques were then linked to simple fractionation techniques to give further understanding about proteins in disease. The development of electrophoretic and chromatographic separation methods revolutionised our knowledge of proteins as well as of other small molecules in biofluids. The review finishes with the arrival of new technologies such as protein mass spectrometry and the emergence of proteomics.
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Affiliation(s)
- David Perrett
- William Harvey Research Institute, Barts and the London, Queen Mary's School of Medicine and Dentistry, London, UK.
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343
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Rege K, Patel SJ, Megeed Z, Yarmush ML. Amphipathic Peptide-Based Fusion Peptides and Immunoconjugates for the Targeted Ablation of Prostate Cancer Cells. Cancer Res 2007; 67:6368-75. [PMID: 17616696 DOI: 10.1158/0008-5472.can-06-3658] [Citation(s) in RCA: 52] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
We describe the design, generation, and in vitro evaluation of targeted amphipathic fusion peptides and immunoconjugates for the ablation of prostate cancer cells. The overexpression of the prostate-specific membrane antigen (PSMA) was exploited as means to specifically deliver cytotoxic peptides to prostate cancer cells. Cationic amphipathic lytic peptides were chosen as cytotoxic agents due to their ability to depolarize mitochondrial membranes and induce apoptosis. Specific delivery of the lytic peptide was facilitated by PSMA-targeting peptides and antibodies. Our results indicate that although the use of PSMA-targeted peptides only modestly enhanced the cytotoxic activity of the lytic peptide, peptide-antibody conjugates were two orders of magnitude more potent than untargeted peptide. In addition to quantifying the cytotoxic activities of the individual constructs, we also investigated the mechanisms of cell death induced by the fusion peptides and immunoconjugates. Although fusion peptides induced oncotic/necrotic death in cells, treatment with immunoconjugates resulted in apoptotic death. In summary, immunoconjugates based on lytic peptides are a promising class of therapeutics for prostate cancer therapy and warrant further investigation.
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Affiliation(s)
- Kaushal Rege
- The Center for Engineering in Medicine, Massachusetts General Hospital, Harvard Medical School, Shriners Hospital for Children, Boston, Massachusetts 02114, USA
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344
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Sapse D, Petraco NDK. A step on the path in the discovery of new latent fingerprint development reagents: substituted Ruhemann's purples and implications for the law. J Mol Model 2007; 13:943-8. [PMID: 17558524 DOI: 10.1007/s00894-007-0220-9] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/08/2007] [Accepted: 05/21/2007] [Indexed: 10/23/2022]
Abstract
Energies corresponding to optimum geometries of ninhydrin, some of its analogs, the corresponding Ruhemann's Purple analogs and some of the intermediates of the reaction between ninhydrin analogs and amino acids are calculated at Hartree-Fock/6-31G** level of theory. Such a study is significant from a forensic science point of view because of the strong interest in the forensic chemistry and law enforcement communities in developing alternatives to the current generation of ninhydrin-like chemicals for the detection and development of latent fingerprints. In examining our new predictions for the net energetics of the reactions in the formation of substituted Ruhemann's Purples, we find that a fluorine-containing analog is the most thermodynamically feasible reaction. In light of this finding, we suggest further experimental studies to determine the kinetic feasibility of synthesizing the fluorine-containing analog, as well as other similar molecules and to determine their spectroscopic properties.
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Affiliation(s)
- Danielle Sapse
- Department of Law and Police Science, John Jay College of Criminal Justice, City University of New York, New York, NY 10019, USA
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345
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Frank MP, Powers RW. Simple and rapid quantitative high-performance liquid chromatographic analysis of plasma amino acids. J Chromatogr B Analyt Technol Biomed Life Sci 2007; 852:646-9. [PMID: 17254851 PMCID: PMC2201986 DOI: 10.1016/j.jchromb.2007.01.002] [Citation(s) in RCA: 60] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/20/2006] [Revised: 01/05/2007] [Accepted: 01/09/2007] [Indexed: 11/15/2022]
Abstract
A simple and rapid high performance liquid chromatographic method for the determination of plasma amino acids was developed. The method uses minimal sample volume and automated online precolumn derivitization of amino acids with o-phthalaldehyde and fluorescent detection. Amino acids are separated by a simplified gradient without column heating. The assay is linear from 5 to 1000 micromol/L for all amino acids. Recovery of amino acids was between 91 and 108%, intra-assay coefficient of variation (CV) was 1-7%, and inter-assay CV was 2-12%. The simple sample preparation and minimal sample volume make the method useful for the quantitation of amino acids in both patient and experimental animal samples.
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Affiliation(s)
- Michael P. Frank
- Magee-Womens Research Institute, University of Pittsburgh School of Medicine, Pittsburgh, PA, USA
| | - Robert W. Powers
- Magee-Womens Research Institute, University of Pittsburgh School of Medicine, Pittsburgh, PA, USA
- Department of Obstetrics & Gynecology and Reproductive Sciences, University of Pittsburgh School of Medicine, Pittsburgh, PA, USA
- *address correspondence to this author at: Department of Obstetrics & Gynecology and Reproductive Sciences, University of Pittsburgh School of Medicine, 204 Craft Ave, Pittsburgh, PA 15213, USA; fax: 412-641-1503, e-mail:
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346
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Bhaskara B, Nagaraja P. Direct Sensitive Spectrophotometric Determination of Glyphosate by Using Ninhydrin as a Chromogenic Reagent in Formulations and Environmental Water Samples. Helv Chim Acta 2006. [DOI: 10.1002/hlca.200690240] [Citation(s) in RCA: 53] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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347
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Bao Z, Sun S, Li J, Chen X, Dong S, Ma H. Direct Identification of Tryptophan in a Mixture of Amino Acids by the Naked Eye. Angew Chem Int Ed Engl 2006; 45:6723-5. [PMID: 16983713 DOI: 10.1002/anie.200602144] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Zhijuan Bao
- Beijing National Laboratory for Molecular Sciences, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100080, China
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348
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Bao Z, Sun S, Li J, Chen X, Dong S, Ma H. Direct Identification of Tryptophan in a Mixture of Amino Acids by the Naked Eye. Angew Chem Int Ed Engl 2006. [DOI: 10.1002/ange.200602144] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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349
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Butylina S, Luque S, Nyström M. Fractionation of whey-derived peptides using a combination of ultrafiltration and nanofiltration. J Memb Sci 2006. [DOI: 10.1016/j.memsci.2006.01.046] [Citation(s) in RCA: 31] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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350
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Akram M, Zaidi NH, Kabir-ud-Din. Kinetics and mechanism of interaction of dipeptide (glycyl-glycine) with ninhydrin in aqueous micellar media. INT J CHEM KINET 2006. [DOI: 10.1002/kin.20195] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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