Abstract:
:We used an aqueous leaf extract of Camellia sinensis to synthesize Ag nanoparticles (AgNPs). A layer of ca. 6 nm around a group of the AgNPs in which the inner layer is bound to the AgNPs surface via the hydroxyl groups of catechin has been observed. TEM analysis of AgNPs showed the formation of truncated triangular nanoplates and/or nanodisks and spherical with some irregular-shaped polydispersed nanoparticles in absence and presence of shape-directing cetyltrimethylammonium bromide. The polyphenolic groups of epigallocatechin-3-gallate (EGCG) are responsible for the rapid reduction of Ag(+) ions into metallic Ag(0). The free -OH groups are able to stabilize AgNPs by the interaction between the surface Ag atoms of AgNPs and oxygen atoms of EGCG molecules.
journal_name
Bioprocess Biosyst Engjournal_title
Bioprocess and biosystems engineeringauthors
Hussain S,Khan Zdoi
10.1007/s00449-013-1094-0subject
Has Abstractpub_date
2014-07-01 00:00:00pages
1221-31issue
7eissn
1615-7591issn
1615-7605journal_volume
37pub_type
杂志文章abstract::The aim of this study is to achieve high-level extracellular production of D-Psicose-3-epimerase (DPE) with recombinant Escherichia coli. High-level production of DPE is one of the key factors in D-Psicose production. In the present study, the gene AAL45544.1 from Agrobacterium tumefaciens str. C58 was modified by art...
journal_title:Bioprocess and biosystems engineering
pub_type: 杂志文章
doi:10.1007/s00449-013-0952-0
更新日期:2013-11-01 00:00:00
abstract::Corn stover (CS) was hydrothermally pretreated using CH3COOH (0.3 %, v/v), and subsequently its ability to be utilized for conversion to ethanol at high-solids content was investigated. Pretreatment conditions were optimized employing a response surface methodology (RSM) with temperature and duration as independent va...
journal_title:Bioprocess and biosystems engineering
pub_type: 杂志文章
doi:10.1007/s00449-016-1618-5
更新日期:2016-09-01 00:00:00
abstract::We generated a genetically engineered Klebsiella pneumoniae strain (AK-VOT) to eliminate by-product formation during production of 1,3-propanediol (1,3-PD) from glycerol. In the present study, the glycerol-metabolizing properties of the recombinant strain were examined during fermentation in a 5 L bioreactor. As expec...
journal_title:Bioprocess and biosystems engineering
pub_type: 杂志文章
doi:10.1007/s00449-011-0603-2
更新日期:2012-01-01 00:00:00
abstract::A serine protease-producing marine bacterial strain named as PT-1 was isolated and identified as a family of Marinomonas arctica, based on molecular characterization of 16S rRNA gene sequence, phylogenetic tree, and fatty acid composition analyses. Optimized culture conditions for growth of the bacterium PT-1 and prod...
journal_title:Bioprocess and biosystems engineering
pub_type: 杂志文章
doi:10.1007/s00449-015-1514-4
更新日期:2016-02-01 00:00:00
abstract::Rice straw is one of the most abundant renewable energy sources available. Through anaerobic acidogenesis, the substance of rice straw can be converted to volatile fatty acids (VFAs). VFAs itself is of value and is a precursor to biofuels. Hence, it can be converted to mixed alcohols by addition of hydrogen, and biodi...
journal_title:Bioprocess and biosystems engineering
pub_type: 杂志文章
doi:10.1007/s00449-015-1357-z
更新日期:2015-06-01 00:00:00
abstract::Pretreatment method for rapeseed straw by sodium hydroxide was investigated for production of bioethanol and biobutanol. Various pretreatment parameters, including temperature, time, and sodium hydroxide concentration were optimized using a statistical method which is a central composite design of response surface met...
journal_title:Bioprocess and biosystems engineering
pub_type: 杂志文章
doi:10.1007/s00449-011-0650-8
更新日期:2012-06-01 00:00:00
abstract::This paper presents a methodology for the determination of reaction rate constants for nitrifying bacteria and their mean population percentage in biomass in an alternating oxidation ditch system. The method used is based on the growth rate equations of the ASM1 model (IWA) (Henze et al. in Activated sludge models ASM...
journal_title:Bioprocess and biosystems engineering
pub_type: 杂志文章
doi:10.1007/s00449-010-0446-2
更新日期:2011-01-01 00:00:00
abstract::Formulation conditions have a significant influence on the degree of freeze/thaw (FT) stress-induced protein instabilities. Adding cryoprotectants might stabilize the induced FT stress instabilities. However, a simple preservation of protein stability might be insufficient and further methods are necessary. This study...
journal_title:Bioprocess and biosystems engineering
pub_type: 杂志文章
doi:10.1007/s00449-020-02327-3
更新日期:2020-07-01 00:00:00
abstract::Lipase (LP) was immobilized on electrospun and ethanol-dispersed polystyrene-poly(styrene-co-maleic anhydride) (PS-PSMA) nanofibers (EtOH-NF) in the form of enzyme precipitate coatings (EPCs). LP precipitate coatings (EPCs-LP) were prepared in a three-step process, consisting of covalent attachment, LP precipitation, ...
journal_title:Bioprocess and biosystems engineering
pub_type: 杂志文章
doi:10.1007/s00449-011-0534-y
更新日期:2011-09-01 00:00:00
abstract::Naturally mevalonate-resistant acetogen Clostridium sp. MT1243 produced only 425 mM acetate during syngas fermentation. Using Clostridium sp. MT1243 we engineered biocatalyst selectively producing mevalonate from synthesis gas or CO₂/H₂ blend. Acetate production and spore formation were eliminated from Clostridium sp....
journal_title:Bioprocess and biosystems engineering
pub_type: 杂志文章
doi:10.1007/s00449-013-0991-6
更新日期:2014-02-01 00:00:00
abstract::Cellulosic sludge from paper mills making bleached products can be enzymatically converted to glucose. A kinetic model that accounts for product inhibition was used to estimate the cost:benefits of the process. In the proposed scheme, the sludge is enzymatically hydrolyzed in a sequence of CSTRs, the ash separated, an...
journal_title:Bioprocess and biosystems engineering
pub_type: 杂志文章
doi:10.1007/s00449-012-0856-4
更新日期:2013-08-01 00:00:00
abstract::L-arabinose isomerase (L-AI) (EC 5. 3. 1. 4. L-AI) that mediates the isomerization of D-galactose to D-tagatose was isolated from Lactobacillus brevis (MF 465792), and was further purified and characterized. Pure enzyme with molecular weight of 60.1 kDa was successfully obtained after the purification using Native-PAG...
journal_title:Bioprocess and biosystems engineering
pub_type: 杂志文章
doi:10.1007/s00449-018-2018-9
更新日期:2019-01-01 00:00:00
abstract::A novel β-1,3-1,4-glucanase gene was identified in Bacillus sp. SJ-10 (KCCM 90078) isolated from jeotgal, a traditional Korean fermented fish. We analysed the β-1,3-1,4-glucanase gene sequence and examined the recombinant enzyme. The open reading frame of the gene encoded 244 amino acids. The sequence was not identica...
journal_title:Bioprocess and biosystems engineering
pub_type: 杂志文章
doi:10.1007/s00449-013-0896-4
更新日期:2013-06-01 00:00:00
abstract::The effectiveness of coil UV reactor series for the online sterilization of cheese whey was compared to those of the single conventional and coil reactors at various flow rates (5-70 mL/min). The residence time varied from 168 to 12 min and from 48 to 24 min for the single and the series reactors, respectively. Hundre...
journal_title:Bioprocess and biosystems engineering
pub_type: 杂志文章
doi:10.1007/s00449-006-0076-x
更新日期:2006-10-01 00:00:00
abstract::The major nutrients, pH and temperature were evaluated for the exopolysaccharide (EPS) production by Daedalea dickinsii in submerged culture to derive an optimal medium composition and conditions as follows: 50 g/L maltose, 5 g/L soy peptone, 5 mM CaCl(2), at pH 6.0 and 28 °C. A purified EPS fraction was attained from...
journal_title:Bioprocess and biosystems engineering
pub_type: 杂志文章
doi:10.1007/s00449-013-1111-3
更新日期:2014-07-01 00:00:00
abstract::Of various metal ions (Ca2+, Cr3+, Cu2+, Fe2+, Mg2+, Mn2+, Ni2+ and Zn2+) added to the culture medium of Agrobacterium tumefaciens at 1 mM, only Ca2+ increased Coenzyme Q10 (CoQ(10)) content in cells without the inhibition of cell growth. In a pH-stat fed-batch culture, supplementation with 40 mM of CaCO3 increased th...
journal_title:Bioprocess and biosystems engineering
pub_type: 杂志文章
doi:10.1007/s00449-009-0318-9
更新日期:2009-08-01 00:00:00
abstract::This work studies the sequential execution of dilute sulfuric acid (DAP) (0.1-0.75 %, v/v) and dilute sodium hydroxide (AKP) (0.25-3 %, w/v) [i.e., DAP followed by AKP (DAP+AKP) and vice versa (AKP+DAP)] at low temperatures (<121 °C) and short reaction times (5-60 min) for maximizing sugar recovery in the enzymatic hy...
journal_title:Bioprocess and biosystems engineering
pub_type: 杂志文章
doi:10.1007/s00449-015-1355-1
更新日期:2015-06-01 00:00:00
abstract::An optimized repeated-fed-batch fermentation process for the synthesis of dihydroxyacetone (DHA) from glycerol utilizing Gluconobacter oxydans is presented. Cleaning, sterilization, and inoculation procedures could be reduced significantly compared to the conventional fed-batch process. A stringent requirement was tha...
journal_title:Bioprocess and biosystems engineering
pub_type: 杂志文章
doi:10.1007/s00449-003-0338-9
更新日期:2003-12-01 00:00:00
abstract::The biological production of butanol has become an important research field and thanks to genome sequencing and annotation; genome-scale metabolic reconstructions have been developed for several Clostridium species. This work makes use of the iCAC490 model of Clostridium acetobutylicum ATCC 824 to analyze its metaboli...
journal_title:Bioprocess and biosystems engineering
pub_type: 杂志文章
doi:10.1007/s00449-015-1513-5
更新日期:2016-02-01 00:00:00
abstract::Simultaneous organics removal and bio-electrochemical denitrification using a microbial fuel cell (MFC) reactor were investigated in this study. The electrons produced as a result of the microbial oxidation of glucose in the anodic chamber were transferred to the anode, which then flowed to the cathode in the cathodic...
journal_title:Bioprocess and biosystems engineering
pub_type: 杂志文章
doi:10.1007/s00449-007-0164-6
更新日期:2008-06-01 00:00:00
abstract::In this study, hydrolysis of marine algal biomass Kappaphhycus alvarezii using two different acid catalysts was examined with the goal of identifying optimal reaction conditions for the formation of sugars and by-products. K. alvarezii were hydrolyzed by autoclave using sulfuric acid or hydrochloric acid as catalyst w...
journal_title:Bioprocess and biosystems engineering
pub_type: 杂志文章
doi:10.1007/s00449-011-0609-9
更新日期:2012-01-01 00:00:00
abstract::The mechanism of thermal inactivation about xanthine oxidase (XOD) from Arthrobacter M3 was investigated. Results of reducing SDS-PAGE indicated that the inactivation of XOD was not related to the peptide degradation. Meanwhile, fluorimetry and circular dichroism spectroscopy suggested that XOD inactivation might be a...
journal_title:Bioprocess and biosystems engineering
pub_type: 杂志文章
doi:10.1007/s00449-013-1042-z
更新日期:2014-04-01 00:00:00
abstract::Salmonella is a major pathogen that causes acute foodborne outbreaks worldwide. Seafood, particularly shellfish, is a proven source of Salmonella spp. infection because many people prefer to eat it raw or lightly cooked. However, traditional identification methods are too time-consuming and complex to detect contamina...
journal_title:Bioprocess and biosystems engineering
pub_type: 杂志文章
doi:10.1007/s00449-018-1895-2
更新日期:2018-05-01 00:00:00
abstract::Tissue engineered constructs reported to date have been prepared primarily from poly(glycolic) acid or collagen scaffolds onto which cells are grown and matured. In this paper we report experimental data to demonstrate the use of a natural, human protein, as a tubular scaffold for vascular grafting. Using a manual and...
journal_title:Bioprocess and biosystems engineering
pub_type: 杂志文章
doi:10.1007/s004490100268
更新日期:2002-04-01 00:00:00
abstract::Selected biodegradable municipal solid waste fractions were subjected to fifteen different pre-hydrolysis treatments to obtain the highest glucose yield for bio-ethanol production. Pre-hydrolysis treatments consisted of dilute acid (H(2)SO(4), HNO(3) or HCl, 1 and 4%, 180 min, 60 degrees C), steam treatment (121 and 1...
journal_title:Bioprocess and biosystems engineering
pub_type: 杂志文章
doi:10.1007/s00449-007-0114-3
更新日期:2007-05-01 00:00:00
abstract::Estimation of the energy capacity of a microbial cell mass on the basis of its lipid content and elemental composition can be used for the comparative evaluation of different microbial sources of biodiesel. Lipomyces starkeyi cell mass concentration reached 94.6 g/L with 37.4% of lipids in a fed-batch process using xy...
journal_title:Bioprocess and biosystems engineering
pub_type: 杂志文章
doi:10.1007/s00449-015-1394-7
更新日期:2015-08-01 00:00:00
abstract::We propose an adaptive control law that allows one to identify unstable steady states of the open-loop system in the single-species chemostat model without the knowledge of the growth function. We then show how one can use this control law to trace out (reconstruct) the whole graph of the growth function. The process ...
journal_title:Bioprocess and biosystems engineering
pub_type: 杂志文章
doi:10.1007/s00449-013-0912-8
更新日期:2013-10-01 00:00:00
abstract::For the construction of an efficient copper waste treatment system, a cell surface display strategy was employed. The copper adsorption ability of recombinant bacterial strains displaying three different copper binding peptides were evaluated in LB Luria-Bertani medium (LB), artificial wastewater, and copper phthalocy...
journal_title:Bioprocess and biosystems engineering
pub_type: 杂志文章
doi:10.1007/s00449-015-1447-y
更新日期:2015-11-01 00:00:00
abstract::A highly efficient β-1,4-mannanase-secreting strain, Pholiota adiposa SKU0714, was isolated and identified on the basis of its morphological features and sequence analysis of internal transcribed spacer rDNA. P. adiposa β-1,4-mannanase was purified to homogeneity from P. adiposa culture supernatants by one-step chroma...
journal_title:Bioprocess and biosystems engineering
pub_type: 杂志文章
doi:10.1007/s00449-014-1156-y
更新日期:2014-09-01 00:00:00
abstract::Menaquinone homologs (MK-n), that is, MK-4, MK-5, and MK-6, can be produced by the fermentation of Flavobacterium. In this study, we proposed a simple and efficient method for the extraction of menaquinones from wet cells without the process of drying the biomass. Meanwhile, a rapid and effective solution for the sepa...
journal_title:Bioprocess and biosystems engineering
pub_type: 杂志文章
doi:10.1007/s00449-017-1851-6
更新日期:2018-01-01 00:00:00