Water-Soluble C-Scorpionate Complexes - Catalytic and Biological Applications

2016 ◽  
Vol 2016 (15-16) ◽  
pp. 2236-2252 ◽  
Author(s):  
Luísa M. D. R. S. Martins ◽  
Armando J. L. Pombeiro
Keyword(s):  
Water Soluble ◽  
Biological Applications ◽  
Soluble C ◽  
Water Soluble C

Nitrogen mineralisation rates from soil amended with dairy pond waste

Soil Research ◽  
1998 ◽  
Vol 36 (2) ◽  
pp. 217 ◽  
Author(s):  
M. J. Noonan ◽  
M. Zaman ◽  
K. C. Cameron ◽  
H. J. Di
Keyword(s):  
Microbial Biomass ◽  
Soil Microbial Biomass ◽  
Water Soluble ◽  
Organic N ◽  
Ammonium Concentration ◽  
Soil Leachate ◽  
Soil Microbial ◽  
N Release ◽  
Soluble C ◽  
Water Soluble C

An open incubation and leaching study was conducted under controlled temperature (25°C) and moisture conditions to measure the N mineralisation rate in soil amended with dairy pond sludge. The dairy pond sludge was applied at 3 different rates equivalent to 0, 200, and 400 kg N/ha. The incubation was conducted at 3 different soil moisture potentials (0, -3, and -13 kPa). Following each 2-week period of incubation, the soil was leached with 2 pore volumes of deionised water to remove the mineralisation products. Mineralisation products in the leachate and enzyme activities, microbial biomass C and N, pH, and water-soluble C in the soil were determined. The incubation lasted 18 weeks. Rapid release of nitrate occurred during the first 6 weeks of incubation, followed by a slow release over the remainder of the incubation period. Although the total amount of N released in the 200 kg N/ha treatment (169 mg N/kg soil) was less than in the 400 kg N/ha treatment (206 mg N/kg soil), when expressed as a percentage of the organic N applied, the amount of N released at the lower rate (18·4%) was greater than that at the higher rate of sludge treatment (13·0%). Rapid nitrification decreased the soil leachate ammonium concentration and the soil pH. Soil microbial biomass, water-soluble C, and deaminase activity were significantly increased after the addition of dairy pond sludge. The increase in soil microbial biomass observed was probably due to the increased water-soluble C and nutrients that stimulated the soil microbial growth. The rapid N release and nitrification rates observed were attributed to the low C : N ratio (12·7), high ammonium content (145 mg N/kg) of the dairy pond sludge used, and the optimum moisture and temperature conditions. The narrow range of soil water potential conditions did not have any significant effect on N release rate or amount.

β-Cyclodextrin functionalized carbon quantum dots as sensors for determination of water-soluble C60 fullerenes in water

The Analyst ◽  
2016 ◽  
Vol 141 (9) ◽  
pp. 2682-2687 ◽  
Author(s):  
Angelina Cayuela ◽  
M. Laura Soriano ◽  
Miguel Valcárcel
Keyword(s):  
Quantum Dots ◽  
Direct Determination ◽  
Carbon Quantum Dots ◽  
Water Soluble ◽  
Soluble C ◽  
Water Soluble C ◽  
C60 Fullerenes

A selective photoluminescence method based on Carbon Quantum Dots (CQDs) functionalized with carboxymethyl-β-cyclodextrin for the direct determination of water-soluble C60 fullerene has been developed.

scholarly journals The size and the age of the metabolically active carbon in tree roots

2021 ◽  
Author(s):  
Boaz Hilman ◽  
Jan Muhr ◽  
Juliane Helm ◽  
Iris Kuhlmann ◽  
Erst-Detlef Schulze ◽  
...  
Keyword(s):  
Isotope Composition ◽  
Water Soluble ◽  
Tree Roots ◽  
Prolonged Incubation ◽  
Active Pool ◽  
External Sources ◽  
Isotope Composition Of Water ◽  
Soluble C ◽  
Stem Girdling ◽  
Water Soluble C

Little is known about the sources and age of C respired from tree roots. Previous research in tree stems has identified two functional pools of non-structural carbohydrates (NSC): an ‘active’ pool supplied directly from canopy photo-assimilates that supports metabolism and a ‘stored’ pool used when fresh C supplies are limited. We compared the C isotope composition of water soluble NSC and respired CO for aspen roots (Populus tremula hybrids) that were cut off fresh C supply via stem-girdling and prolonged incubation of excised roots. We used bomb radiocarbon to estimate the time elapsed since C fixation for respired CO, water-soluble C, and structural α-cellulose. While freshly excised roots respired CO with mean age <1 yr, within a week the age increased to 1.6-2.9 yr. Freshly excised roots from trees girdled ~3 months previously had similar respiration rates and NSC stocks as un-girdled trees, but respired older C (~1.2 yr). We estimate the NSC in girdled roots must be replaced 5-7 times by reserves remobilized from root-external sources. Using a mixing model and observed correlations between ΔC of water-soluble C and α-cellulose, we estimate ~30% of C is ‘active’ (~5 mg C g).

Studies on the Interaction of Water-Soluble Fullerols with BSA and the Effects of Metallic Ions

2001 ◽  
Vol 675 ◽  
Author(s):  
Xu Bingshe ◽  
Liu Xuguang ◽  
Yan Xiaoqin ◽  
Qiao Jinli ◽  
Jin Weijun
Keyword(s):  
Hydrogen Bond ◽  
Energy Transfer ◽  
Energy Transfer Efficiency ◽  
Water Soluble ◽  
Metallic Ions ◽  
Low Concentrations ◽  
Apparent Binding Constant ◽  
High Concentrations ◽  
Soluble C ◽  
Water Soluble C

ABSTRACTThe interaction of water-soluble C60 derived fullerols with bovine serum albumin (BSA) in physiological environment was studied in detail by the fluorescence method. Experiments showed that the interaction of fullerols with BAS is mainly in the manner of non-covalent hydrogen bond. Based on the measurements of fluorescence intensity, the apparent binding constant K and the binding site number n were obtained with K=4000 and n=1, and the energy transfer efficiency in the reaction is 0.63. Besides, the effects of metallic ions such as Cu2+, Fe3+ and Cr(VI) on the interaction of fullerols with BSA were investigated. It was found that the effects of the metallic ions are quite different from each other. Low concentrations of Cu2+ can promote the interactions between fullerols and BSA, while high concentrations of Fe3+ or Cr(VI) favorite the interactions between fullerols and BSA.

Sign in / Sign up

Export Citation Format

Share Document