scholarly journals Efficient conversion of bicarbonate (HCO3−) to acetate and simultaneous heavy metal Cr(VI) removal in photo-assisted microbial electrosynthesis systems combining WO3/MoO3/g-C3N4 heterojunctions and Serratia marcescens electrotroph

2021 ◽  
Vol 406 ◽  
pp. 126786 ◽  
Author(s):  
Liping Huang ◽  
Shiping Song ◽  
Zhenghong Cai ◽  
Peng Zhou ◽  
Gianluca Li Puma
Keyword(s):  
Heavy Metal ◽  
Serratia Marcescens ◽  
Microbial Electrosynthesis ◽  
Efficient Conversion

scholarly journals Draft Genome Sequence of Heavy Metal-Resistant Soil Bacterium Serratia marcescens S2I7, Which Has the Ability To Degrade Polyaromatic Hydrocarbons

2017 ◽  
Vol 5 (48) ◽  
Author(s):  
Rhitu Kotoky ◽  
L. Paikhomba Singha ◽  
Piyush Pandey
Keyword(s):  
Heavy Metal ◽  
Serratia Marcescens ◽  
Genome Sequence ◽  
Draft Genome ◽  
Gc Content ◽  
Metal Resistance ◽  
Draft Genome Sequence ◽  
Circular Chromosome ◽  
Degrading Bacterium ◽  
Heavy Metal Resistant

ABSTRACT Serratia marcescens S2I7 is a heavy metal-resistant, polyaromatic hydrocarbon-degrading bacterium isolated from petroleum-contaminated sites. The genome contains one circular chromosome (5,241,555 bp; GC content 60.1%) with 4,533 coding sequences. The draft genome sequence includes specific genetic elements for degradation of hydrocarbons and for heavy metal resistance.

scholarly journals Biosorption of nickel, cobalt, zinc and copper ions by Serratia marcescens strain 16 in mono and multimetallic systems

2021 ◽  
Author(s):  
A. Díaz ◽  
J. Marrero ◽  
G. Cabrera ◽  
O. Coto ◽  
J. M. Gómez
Keyword(s):  
Heavy Metal ◽  
Serratia Marcescens ◽  
Metal Uptake ◽  
Copper Ions ◽  
Metallurgical Industry ◽  
Biosorption Capacity ◽  
Metal Biosorption ◽  
Nickel Cobalt ◽  
Threat To Life ◽  
Heavy Metal Biosorption

AbstractThe metallurgical industry is one of the main sources of heavy metal pollution, which represents a severe threat to life. Metals can be removed from aqueous solutions by using microbial biomasses. This paper analyses the heavy metal biosorption capacity of Serratia marcescens strain 16 in single and multimetallic systems. The results obtained show that Co(II), Ni(II) and Zn(II) biosorption in monometallic systems is two to three times higher than in the presence of bi-metallic and multimetallic solutions. Fourier transform infrared spectroscopy confirmed that carbonyl, carboxyl and hydroxyl were the main functional groups, as well as the amide bands I and II involved in metal uptake, which are present in external structures of the bacterial cell. The results obtained demonstrated the viability of S. marcescens strain 16 as a biosorbent for the design of eco-friendly technologies for the treatment of waste liquor.

scholarly journals The Metabolism of Arginine in Serratia Marcescens II. Carbamy1-Adednosine Diphosphate Phosphoferase

1956 ◽  
Vol 9 (2) ◽  
pp. 253 ◽  
Author(s):  
KT Glasziou
Keyword(s):  
Heavy Metal ◽  
Serratia Marcescens ◽  
Phosphatase Activity ◽  
Metal Cations ◽  
Carbamyl Phosphate ◽  
Heavy Metal Cations ◽  
Activity Inhibition

Carbamyl-adenesine diphesphate (ADP) phosphoforase, an enzyme which eatalysos the synthosis and broakdown of oarbamyl phosphate (CAP), has beon purified 43-fold and obtained free of carbamyl phosphate phosphatase activity. ADP, but not. adenosine mOllophosphate, has been shown to be a sllbsLrate for the enzyme. Magnesium or manganous ions are requirod for activity. Inhibition by heavy metal cations and p-chloromorcuribenzoato indicate that, a sulpbydryl group is involved in catalysis.

Complementary Z-Contrast Imaging and Digital Image Processing

1985 ◽  
Vol 43 ◽  
pp. 304-305
Author(s):  
K. N. Colonna ◽  
G. Oliphant
Keyword(s):  
Image Processing ◽  
Heavy Metal ◽  
Digital Image Processing ◽  
Digital Image ◽  
Biological Tissue ◽  
Biological Imaging ◽  
Tissue Preparation ◽  
Contrast Imaging ◽  
Imaging Tool ◽  
Z Contrast

Harmonious use of Z-contrast imaging and digital image processing as an analytical imaging tool was developed and demonstrated in studying the elemental constitution of human and maturing rabbit spermatozoa. Due to its analog origin (Fig. 1), the Z-contrast image offers information unique to the science of biological imaging. Despite the information and distinct advantages it offers, the potential of Z-contrast imaging is extremely limited without the application of techniques of digital image processing. For the first time in biological imaging, this study demonstrates the tremendous potential involved in the complementary use of Z-contrast imaging and digital image processing.Imaging in the Z-contrast mode is powerful for three distinct reasons, the first of which involves tissue preparation. It affords biologists the opportunity to visualize biological tissue without the use of heavy metal fixatives and stains. For years biologists have used heavy metal components to compensate for the limited electron scattering properties of biological tissue.

Recent Progress In High-Resolution Shadowing For Biological Transmission Electron Microscopy

1990 ◽  
Vol 48 (1) ◽  
pp. 510-511 ◽  
Author(s):  
Heinz Gross ◽  
Katarina Krusche ◽  
Peter Tittmann
Keyword(s):  
Heavy Metal ◽  
High Resolution ◽  
Freeze Drying ◽  
Atmospheric Conditions ◽  
Vacuum Equipment ◽  
Transmission Electron ◽  
Gas Atmosphere ◽  
Gas Molecules ◽  
Residual Gas ◽  
Backing Layer

Freeze-drying followed by heavy metal shadowing is a long established and straight forward approach to routinely study the structure of dehydrated macromolecules. Very thin specimens such as isolated membranes or single macromolecules are directly adsorbed on C-coated grids. After rapid freezing the grids are transferred into a suitable vacuum equipment for freeze-drying and heavy metal shadowing.To improve the resolution power of shadowing films we introduced shadowing at very low specimen temperature (−250°C). To routinely do that without the danger of contamination we developed in collaboration with Balzers an UHV (p≤10-9 mbar) machine (BAF500K, Fig.2). It should be mentioned here that at −250°C the specimen surface acts as effective cryopump for practically all impinging residual gas molecules from the residual gas atmosphere.Common high resolution shadowing films (Pt/C, Ta/W) have to be protected from alterations due to air contact by a relatively thick C-backing layer, when transferred via atmospheric conditions into the TEM. Such an additional C-coat contributes disturbingly to the contrast at high resolution.

Sign in / Sign up

Export Citation Format

Share Document