37 results about "Metal toxicity" patented technology

The invention discloses a broad-spectrum soil heavy metal passivating microbial inoculum as well as a preparation method and application thereof. The broad-spectrum soil heavy metal passivating microbial inoculum contains Geobacter sulfurreducens HMP-1 and an auxiliary material. According to the broad-spectrum heavy metal passivation microbial inoculum, sulfydryl (-HS) rich on the surface of Geobacter sulfurreducens HMP-1 thalli directly forms metal sulfide minerals with heavy metal ions, so that the toxicity of heavy metal in the environment is reduced. The microbial agent can effectively solve the problems that the existing biological microbial agent is limited in heavy metal type remediation, not direct in passivation effect and large in economic investment, the removal rate of heavy metals in soil and rice reaches 70% or above, the toxicity of broad-spectrum heavy metals is reduced under the condition that the physical and chemical properties of the soil are not affected, and meanwhile, the cost is reduced. The development of a heavy metal pollution microbial remediation technology is promoted.

Metal binding polycarboxylated porphyrins, their precursors, or cofactors in the porphyrin biosynthetic pathway, are administered to individuals determined to be subject to or predisposed to a polycarboxylated porphyrin-binding metal toxicity to increase the level of the metal-binding polycarboxylated porphyrin in the individual.

Embodiments of the present invention relate generally the use of certain compositions, e.g., compositions comprising a glutathione precursor and a selenium source, in the therapy of viral diseases and / or reducing the incidence of viral diseases. Related embodiments of the present invention relate to treatment and / or reducing the incidence of respiratory ailments caused by respiratory syncytial virus (RSV) or hemorrhagic fever (EHF) caused by Ebola viruses (EBV) or Marburg virus. Yet in other embodiments, the invention relates to reducing metal toxicity in a biological system, which involves contacting the biological system with a composition comprising a glutathione precursor and a selenium source, optionally together with a chelating agent, an antioxidant, a metallothioneine protein or a fragment of metallothioneine.

The invention discloses a method for modifying biochar, comprising: 1) pyrolyzing wheat straw and fresh whole cattail plants into biochar with limited oxygen and pulverizing them; 2) first soaking the prepared biochar in hydrogen peroxide, and then Soak in an aqueous solution of maleic acid and polyethylene glycol, cool and filter to obtain solid phase A; 3) disperse solid phase A in ethanol to form a suspension, add 2, 2, 6, 6-tetramethylpiperidine-nitrogen-oxide, methacrylic acid to obtain solid phase B; 4) solid phase B is soaked in an aqueous solution of acetic acid, and potassium periodate is added to the solution to obtain solid phase C; 5) The solid phase C was soaked in the mixture of dimethylformamide and N-methylpyrrolidone to obtain the modified biochar. The invention optimizes the modification process of biochar, adopts wheat straw and cattail as composite biochar, and optimizes the modification on the basis of the composite biochar, so that the Cd repair effect of biochar is very significant, and after being applied to cadmium-contaminated soil , significantly reducing the toxicity of heavy metals in the soil.

The invention discloses a determination method for wheat root elongation toxicity of nickel ions under a hydroponic condition and application and belongs to the field of ecological heavy metal toxicity assessment. A control variable method is adopted, concentration of positive ions is controlled and changed separately, the inhibiting effects of five types of positive ions including K<+>, Na<+>, Ca<2+>, Mg<2+> and H<+> on nickel ion toxicity are calculated out step by step, meanwhile a MINTEQ program is utilized to calculate the amount of Ni<2+> and the amount of NiHCO3<+> under all conditions so as to calculate the toxic effects of two nickel forms, biological toxicity inhibition parameters of all the positive ions on Ni and toxic effect parameters of the two Ni forms are determined, the method for determining wheat root toxicity of Ni<2+> is established under the hydroponic condition, an obtained result can be used for prediction of wheat root toxicity of the Ni<2+> under the hydroponic condition, and a reference is made to soil heavy metal ecological risk assessment and soil contamination treatment.