37 results about "Metal toxicity" patented technology

A fertilizer composition for improving stress resistance of land planted pear trees comprises arbuscular mycorrhizal fungi, betaine, salicylic acid, ethylenediamine-N,N'-bis(2-hydroxyphenylacetic acid) ferric-sodium complex (EDDHA-Fe), a chelate zinc fertilizer titanium zinc ethylenediaminetetraacetate, a promoter and fertilizers containing other elements. Contained arbuscular mycorrhizal fungi is capable of substantially improving stress resistance on drought, waterlogging disaster, salt and alkali, high temperature, heavy metal toxicity, toxic organics and the like of pear trees, and promoting absorption of soil mineral nutritional elements by soil. Betaine and salicylic acid are capable of inducing to improve crop resistance on adverse situations such as drought, freeze injury and the like.

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.

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 relates to the field of water quality pollution evaluation, in particular to a fresh water chronic standard prediction method based on the metal quantitative structure-activity relation. The method includes the steps of predicting the unknown metal virulence terminal point according to the quantitative relation between the structure characteristics of heavy metal ions and the choric toxicity effect of aquatic organisms, and conducting analysis and derivation to obtain the danger concentration that protects aquatic organisms of different ratios through the combination with the sensitiveness distribution of different species. According to the method, the QSAR metal toxicity prediction model is established by synthesizing heavy metal physicochemical structure parameters and toxication mechanisms of different aquatic organisms, and the model is used for predicting the unknown standard continuous concentration. On the basis of the ecology principle, six phyla and eight families of aquatic organisms are screened through a system to serve as a minimum biological prediction set, single-parameter toxicity prediction models are established, and the model accuracy and the prediction capacity are improved.

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 high-nitrogen nickel-free austenite antibacterial stainless steel (HNSAg) and a manufacturing method thereof. The stainless steel comprises carbon, silicon, manganese, chromium, molybdenum, copper, nitrogen, niobium, silver and the balance of iron by weight percent; the high-nitrogen nickel-free austenite antibacterial stainless steel (HNSAg) is of a single austenite structure after subjected to solution treatment, and is excellent in pitting corrosion resistance in a non-microorganism environment and good in bacterial resistance and microorganism corrosion resistance in a microorganism environment; the antibacterial rate of the stainless steel on staphylococcus aureus and escherichia coli reaches more than 93%; the nickel release risk is inexistent; the manganese release rate in artificial saliva and sweat is much lower than the acceptable daily intake standard; the stainless steel can be used as a biomedical material; and the metal toxicity risk is inexistent. The high-nitrogen nickel-free austenite antibacterial stainless steel (HNSAg) is very good in flexibility and plasticity, can meet the processing requirements of fine parts such as jewelries and the like, and is superior to chromium-nickel austenite antibacterial stainless steel of 316 L and the like in overall performance.

The invention provides an application of a compound as an ECL material. The compound does not contain metal, has low toxicity, good biocompatibility, low cost, an environmentally friendly synthesis method and good luminous efficiency as an ECL. In the application of the compound as an ECL material, the compound has a specific structural formula that does not contain metal. Specifically, the compound is used as an ECL material, together with a co-reactant, a double electrode and a supporting electrolyte to construct an electrochemiluminescent device. The compound of the present invention can realize the construction of ECL material without metal, which greatly reduces the synthesis cost and has good biocompatibility; the compound of the present invention has good luminous efficiency as an ECL material; the compound of the present invention synthesizes The method and process are simple, water is used as the main synthesis environment in the synthesis process, and the process is green to realize environmental friendliness.

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.