Abstract:
:Sphaerotilus natans is a sheathed bacterium existing in the activated sludge of wastewater treatment plants. It is one of the filamentous bacteria causing the bulking and foaming difficulties of activated sludge. Isolating the strain and culturing it in an axenic environment could not only provide the metabolic knowledge of the strains that would be useful in the development of wastewater treatment methods, but also could enable us to gain an understanding of the mechanism by which poly(3-hydroxybutyrate-co-3-hydroxyvalerate) (poly[3-HB-co-3-HV]) is produced by this strain. This article reports the screening and isolation of the strain from the activated sludge using the Nile blue staining method together with Fourier transform infrared analysis. We investigated the ability of the selected strain to produce poly(3-HB-co-3-HV) copolymer using glucose and peptone, or by adding valeric acid or sodium propionate as precursor. Proper precursor feeding could dramatically enhance its 3HV content in the copolymer P(3HB-co-3HV). By controlling the different feeding times in fed-batch fermentation, different desired copolymers were obtained with 15, 40, and 70% 3HV mole fraction of the copolymer. Polymer properties were analyzed by gas chromatography, differential scanning calorimetry, thermo-gravimetry, and nuclear magnetic resonance analysis.
journal_name
Appl Biochem Biotechnoljournal_title
Applied biochemistry and biotechnologyauthors
Liu K,Chua H,Lo WH,Lawford H,Yu PHdoi
10.1385/abab:98-100:1-9:1061subject
Has Abstractpub_date
2002-04-01 00:00:00pages
1061-73eissn
0273-2289issn
1559-0291journal_volume
98-100pub_type
杂志文章abstract::Previously, it was reported that human amniotic membrane (AM) induced stem cells from human deciduous exfoliated teeth (SHED) endothelial-like-cell differentiation. This interesting effect of AM matrix on SHED demands further elucidation. Objective of this in vitro work was to study the effect of 24-h VEGF induced on ...
journal_title:Applied biochemistry and biotechnology
pub_type: 杂志文章
doi:10.1007/s12010-020-03266-1
更新日期:2020-05-01 00:00:00
abstract::Trehalose synthase (TreS) from Meiothermus ruber was co-aggregated with polyethyleneimine (PEI) and precipitated with polyethylene glycol (PEG), followed by cross-linking with glutaraldehyde to obtain TreS-polyethyleneimine cross-linked enzyme aggregates (termed as CLEAs-PEI-PEG). The TreS solution at 0.5 mg mL(-1) pr...
journal_title:Applied biochemistry and biotechnology
pub_type: 杂志文章
doi:10.1007/s12010-014-1104-y
更新日期:2014-11-01 00:00:00
abstract::Candida boidinii produces significant amounts of xylitol from xylose, and assays of crude homogenates for aldose (xylose) reductase (XYL1p) have been reported to show relatively high activity with NADH as a cofactor even though XYL1p purified from this yeast does not have such activity. A gene coding for XYL1p from C....
journal_title:Applied biochemistry and biotechnology
pub_type: 杂志文章
doi:10.1385/abab:106:1-3:265
更新日期:2003-04-01 00:00:00
abstract::Lipases are an enzyme class of a great importance as biocatalysts applied to organic chemistry. However, it is still necessary to search for new enzymes with special characteristics such as good stability towards high temperatures, organic solvents, and high stereoselectivity presence. The present work's aim was to im...
journal_title:Applied biochemistry and biotechnology
pub_type: 杂志文章
doi:10.1007/s12010-008-8425-7
更新日期:2009-05-01 00:00:00
abstract::Further characterization of an aspartyl protease from Mucor bacilliformis with milk-clotting activity was performed. An extinction coefficient, epsilon 278 cm = 1.61 mL/mg/cm, a molecular mass of 35,400 Da and a pI of 5.2 were determined. Proteolytic activity and kinetic parameters were evaluated by using the hexapept...
journal_title:Applied biochemistry and biotechnology
pub_type: 杂志文章
doi:10.1007/BF02785991
更新日期:1997-12-01 00:00:00
abstract::Currently, fumaric acid is produced by catalytic isomerization of maleic acid in aqueous solutions at low pH. Being petroleum based, requiring catalyst, and producing vast amounts of by-products and wastewater, the production of fumaric acid from renewable resources by a "green" process is increasingly attractive. In ...
journal_title:Applied biochemistry and biotechnology
pub_type: 杂志文章
doi:10.1007/s12010-014-1468-z
更新日期:2015-03-01 00:00:00
abstract::The synthesis of tricaprylin, tricaprin, trilaurin, and trimyristin in a solvent-free system was conducted by mixing a commercial immobilized lipase with the organic reagents (glycerol and fatty acid) in a 20-mL batch reactor with constant stirring. The effects of temperature, fatty acid/glycerol molar ratio, and enzy...
journal_title:Applied biochemistry and biotechnology
pub_type: 杂志文章
doi:10.1385/abab:98-100:1-9:997
更新日期:2002-04-01 00:00:00
abstract::The stabilization of olive recombinant hydroperoxide lyases (rHPLs) was investigated using selected chemical additives. Two rHPLs were studied: HPL full-length and HPL with its chloroplast transit peptide deleted (matured HPL). Both olive rHPLs are relatively stable at 4 °C, and enzyme activity can be preserved (about...
journal_title:Applied biochemistry and biotechnology
pub_type: 杂志文章
doi:10.1007/s12010-016-2377-0
更新日期:2017-07-01 00:00:00
abstract::Fresh-harvested, air-dried rice straw was pretreated at a water content of 5 g H(2)O/g straw using sodium hydroxide (NaOH) and compared to pretreatment at 10 g H(2)O/g straw by hydrated lime (Ca(OH)(2)). Full factorial experiments including parallel wash-only treatments were completed with both sources of alkali. The ...
journal_title:Applied biochemistry and biotechnology
pub_type: 杂志文章
doi:10.1007/s12010-010-8958-4
更新日期:2010-11-01 00:00:00
abstract::Ovarian malignancy is diagnosed in nearly a fourth of a million women internationally every year. Methylation of RASSF1A tumor suppressor gene prompts its inactivation in diseases. In this study, the RASSF1A promoter methylation was detected by methylated-specific PCR and investigated serum RASSF1A protein level throu...
journal_title:Applied biochemistry and biotechnology
pub_type: 杂志文章
doi:10.1007/s12010-017-2648-4
更新日期:2018-05-01 00:00:00
abstract::This study aimed to investigate fragments derived from human and bovine lactoferrins for ability to inhibit nuclear translocation of HIV-1 integrase. It was shown that human lactoferricin, human lactoferrin 1-11, and bovine lactoferrampin reduced nuclear distribution of HIV-1 integrase. Bovine lactoferrampin could inh...
journal_title:Applied biochemistry and biotechnology
pub_type: 杂志文章
doi:10.1007/s12010-016-2059-y
更新日期:2016-08-01 00:00:00
abstract::This study proposes an innovative strategy of lignocellulose biodegradation by Inonotus obliquus under solid-state fermentation in extracting Eucommia ulmoides trans-1,4-polyisoprene (EUG) and producing reducing sugars efficiently. EUG and sugars were obtained through the white rot fungal pretreatment of E. ulmoides l...
journal_title:Applied biochemistry and biotechnology
pub_type: 杂志文章
doi:10.1007/s12010-020-03347-1
更新日期:2020-11-01 00:00:00
abstract::The partition behavior of proteins, nucleic acids, cell membranes, cell organelles and whole cells has been studied in liquid-liquid two-phase systems composed of water, poly-(ethylene glycol), and an hydroxypropyl starch. The properties of the systems are in many respects comparable with the traditional poly(ethylene...
journal_title:Applied biochemistry and biotechnology
pub_type: 杂志文章
doi:10.1007/BF02921507
更新日期:1990-12-01 00:00:00
abstract::The current increase in amount of shrimp wastes produced by the shrimp industry has led to the need in finding new methods for shrimp wastes disposal. In this study, an extracellular organic solvent- and oxidant-stable metalloprotease was produced by Bacillus cereus SV1. Maximum protease activity (5,900 U/mL) was obta...
journal_title:Applied biochemistry and biotechnology
pub_type: 杂志文章
doi:10.1007/s12010-009-8703-z
更新日期:2010-04-01 00:00:00
abstract::A total of 49 protein sequences of alkaline proteases retrieved from GenBank representing different species of Aspergillus have been characterized for various physiochemical properties, homology search, multiple sequence alignment, motif, and super family search and phylogenetic tree construction. The sequence level h...
journal_title:Applied biochemistry and biotechnology
pub_type: 杂志文章
doi:10.1007/s12010-011-9420-y
更新日期:2012-01-01 00:00:00
abstract::One of the major limitations of effective nonviral gene carriers is their potential high cytotoxicity. Conjugation of polyethylene glycol (PEG) to polymers is a common approach to decrease toxicity and improve biodistribution. The aim of this study was to evaluate the effect of PEGylation on generation 5 polypropyleni...
journal_title:Applied biochemistry and biotechnology
pub_type: 杂志文章
doi:10.1007/s12010-015-1723-y
更新日期:2015-09-01 00:00:00
abstract::Solid-state fermentation using the microfungus Penicillium brevicompactum for the production of mycophenolic acid is reported in this paper. Of the initial substrates tested (whole wheat, cracked wheat, long grain Basmati rice, and short grain Parmal rice), Parmal rice proved to be the best. Under initial conditions, ...
journal_title:Applied biochemistry and biotechnology
pub_type: 杂志文章
doi:10.1007/s12010-016-2313-3
更新日期:2017-05-01 00:00:00
abstract::The wet oxidation pretreatment (water, oxygen, elevated temperature, and pressure) of softwood (Picea abies) was investigated for enhancing enzymatic hydrolysis. The pretreatment was preliminarily optimized. Six different combinations of reaction time, temperature, and pH were applied, and the compositions of solid an...
journal_title:Applied biochemistry and biotechnology
pub_type: 杂志文章
doi:10.1385/abab:117:1:01
更新日期:2004-04-01 00:00:00
abstract::Enzyme-linked immunosorbent assay (ELISA), horseradish peroxidase (HRP)-catalyzed fluorescent reaction, and oxalate chemiluminescence analysis have been combined to develop a highly sensitive, simple, and rapid method for analysis of bovine serum albumin (BSA) based on a pair of specific monoclonal antibodies in vacci...
journal_title:Applied biochemistry and biotechnology
pub_type: 杂志文章
doi:10.1007/s12010-012-9567-1
更新日期:2012-03-01 00:00:00
abstract::Aspartate aminotransferase (AspAT, EC 2.6.1.1) was bound on CNBr-activated Sepharose and the effects of immobilization on the maximum velocity, biologically active pyridoxal-5'-phosphate (PLP), and transaminationable active centers were studied. By comparing these parameters of soluble and immobilized enzyme the facto...
journal_title:Applied biochemistry and biotechnology
pub_type: 杂志文章
doi:10.1007/BF02778094
更新日期:1983-04-01 00:00:00
abstract::Search for efficient low-cost substrate/additives are gaining significant impetus in bacterial cellulose (BC) production. Makgeolli sludge (a traditional Korean wine distillery waste) is enriched with organic acid, alcohol, and sugar. Using makgeolli sludge filtrate (MSF) and Hestrin-Schramm (HS) medium (g/l of distil...
journal_title:Applied biochemistry and biotechnology
pub_type: 杂志文章
doi:10.1007/s12010-014-0810-9
更新日期:2014-04-01 00:00:00
abstract::Oil palm empty fruit bunch (EFB) is abundantly available in Malaysia and it is a potential source of xylose for the production of high-value added products. This study aimed to optimize the hydrolysis of EFB using dilute sulfuric acid (H2SO4) and phosphoric acid (H3PO4) via response surface methodology for maximum xyl...
journal_title:Applied biochemistry and biotechnology
pub_type: 杂志文章
doi:10.1007/s12010-013-0298-8
更新日期:2013-08-01 00:00:00
abstract::In a recombinant antibody scFv format, the presence of an unpaired cysteine (Cys) is implicated in reduced soluble expression and inefficient presentation in phage display. Compared to other species, antibodies derived from rabbits are more likely to contain this unpaired Cys residue at position 80 (Cys80), when gener...
journal_title:Applied biochemistry and biotechnology
pub_type: 杂志文章
doi:10.1007/s12010-017-2691-1
更新日期:2018-07-01 00:00:00
abstract::The article describes preparation of new calixarene biopolymers consisting of the immobilization of convenience calixarene derivative onto cellulose and chitosan biopolymers, and the encapsulation of these calixarene biopolymers with Candida rugosa lipase within a chemical inert sol-gel supported by polycondensation w...
journal_title:Applied biochemistry and biotechnology
pub_type: 杂志文章
doi:10.1007/s12010-013-0308-x
更新日期:2013-08-01 00:00:00
abstract::Biosurfactants are of considerable interest due to their biodegradability, low degree of toxicity, and diverse applications. However, the high production costs involved in the acquisition of biosurfactants underscore the need for optimization of the production process to enable viable application on an industrial scal...
journal_title:Applied biochemistry and biotechnology
pub_type: 杂志文章
doi:10.1007/s12010-014-0761-1
更新日期:2014-03-01 00:00:00
abstract::A method for the convenient and reliable preparation of magnetizable agarose beads containing iron particles is described. The beads were treated with the triazine dye, Reactive Red 120, and the matrix was examined for the ability to extract proteins from crude preparations using lactate dehydrogenase from porcine mus...
journal_title:Applied biochemistry and biotechnology
pub_type: 杂志文章
doi:10.1007/BF02921683
更新日期:1991-08-01 00:00:00
abstract::For trial use in the local chemotherapy of cancer by a combination of cytosine deaminase (EC 3.5.4.1) and 5-fluorocytosine (J. Biotechnol., (1985), 2, 13-21), 40 U of partially purified cytosine deaminase was obtained from 500 g of commercial compressed bakers' yeast. The enzyme, which is unstable, was immobilized to ...
journal_title:Applied biochemistry and biotechnology
pub_type: 杂志文章
doi:10.1007/BF02798356
更新日期:1987-09-01 00:00:00
abstract::The increased additive amount of adjuncts in the raw materials of Chinese beer requires the usage of protease to release more water-soluble proteins. Here, a metallo-neutral protease suited for brewing industry was purified from Bacillus amyloliquefaciens SYB-001. A 5.6-fold purification of the neutral protease was ac...
journal_title:Applied biochemistry and biotechnology
pub_type: 杂志文章
doi:10.1007/s12010-013-0350-8
更新日期:2013-08-01 00:00:00
abstract::MCM-41 and MCM-48 with niobium were successfully synthesized using 1-tetradecyl-3-methylimidazolium chloride ([C14MI]Cl) as a structure-directing agent. The best Si/Nb molar ratio was chosen (Si/Nb = 20) and the CALB enzyme was immobilized in situ in the synthesized Nb-MCM. SEM micrographs showed the formation of very...
journal_title:Applied biochemistry and biotechnology
pub_type: 杂志文章
doi:10.1007/s12010-020-03484-7
更新日期:2021-01-06 00:00:00
abstract::Aspergillus fumigatus N2 was isolated from decaying wood. This strain produces extracellular xylanases and cellulases. The highest xylanase (91.9 U/mL) and CMCase (5.61 U/mL) activity was produced when 1% barley straw was used as the carbon source. The optimum pH and temperature for xylanase activity were 6.0 and 65 °...
journal_title:Applied biochemistry and biotechnology
pub_type: 杂志文章
doi:10.1007/s12010-016-2344-9
更新日期:2017-06-01 00:00:00