Aiming to provide a theoretical basis for possible uses of flaxseed as a food supplement and functional ingredient, the heat treatment of flaxseed was carried out using steaming, roasting, and microwave methods to inv...Aiming to provide a theoretical basis for possible uses of flaxseed as a food supplement and functional ingredient, the heat treatment of flaxseed was carried out using steaming, roasting, and microwave methods to investigate the detoxification effects of these three pretreatment methods on flaxseed, as well as the impact of the three methods on the quality of flaxseed. The results showed that all three pretreatment methods had better detoxification effects on flaxseed, in which, microwave treatment was the most effective method. After 5 min of microwave treatment, the hydrogen cyanide(HCN) content in flaxseed decreased from(94.65±1.68) mg/kg to(7.80±0.57) mg/kg. All three pretreatment methods significantly reduced the water content in flaxseed but had a weaker effect on protein, fat, and ash contents. After pretreatment by the three methods, the polyphenol content, peroxide value(POV), and a*value of flaxseed increased significantly, thiobarbituric acid reactive substances(TBARS) increased, while polyunsaturated fatty acids(PUFA) content, amino acid content, and L*, W*, and b*values decreased, with varying degrees of wrinkles and cracks appearing on the surface of flaxseed, and the overall signal pattern of FTIR spectra did not change much. During the 40℃ accelerated storage process, the quality of flaxseed treated by all three preheating methods generally declined, and correlation analysis revealed that color change was a good indicator of quality changes in flaxseed. Notably, all three pretreatment methods extended the shelf-life of flaxseed. Compared with steaming(120℃ for 20 min) and roasting(100℃ for 40 min), microwave(560 W for 4 min) is recommended to remove cyanogenic glycosides and improve the stability and quality characteristics of flaxseed.展开更多
Simultaneous degradation and detoxification during pharmaceutical and personal care product removal are important for water treatment.In this study,sodium niobate nanocubes decorated with graphitic carbon nitride(NbNC...Simultaneous degradation and detoxification during pharmaceutical and personal care product removal are important for water treatment.In this study,sodium niobate nanocubes decorated with graphitic carbon nitride(NbNC/g-C_(3)N_(4))were fabricated to achieve the efficient photocatalytic degradation and detoxification of ciprofloxacin(CIP)under simulated solar light.NaNbO_(3)nanocubes were in-situ transformed from Na_(2)Nb_(2)O_(6)·H_(2)O via thermal dehydration at the interface of g-C_(3)N_(4).The optimized NbNC/g-C_(3)N_(4)-1 was a type-I heterojunction,which showed a high conduction band(CB)level of−1.68 eV,leading to the efficient transfer of photogenerated electrons to O_(2) to produce primary reactive species,•O_(2)^(-).Density functional theory(DFT)calculations of the density of states indicated that C 2p and Nb 3d contributed to the CB,and 0.37 e^(-)transferred from NaNbO_(3)to g-C_(3)N_(4)in NbNC/g-C_(3)N_(4)based on the Mulliken population analysis of the built-in electric field intensity.NbNC/g-C_(3)N_(4)-1 had 3.3-and 2.3-fold of CIP degradation rate constants(k_(1)=0.173 min^(−1))compared with those of pristine g-C_(3)N_(4)and NaNbO_(3),respectively.In addition,N24,N19,and C5 in CIP with a high Fukui index were reactive sites for electrophilic attack by•O_(2)^(-),resulting in the defluorination and ring-opening of the piperazine moiety of the dominant degradation pathways.Intermediate/product identification,integrated with computational toxicity evaluation,further indicated a substantial detoxification effect during CIP degradation in the photocatalysis system.展开更多
Understanding bacterial strategies for coping with heavy metal stress is essential for elucidating their resilience in contaminated environments.However,whether cell wall exfoliation contributes to bacterial tolerance...Understanding bacterial strategies for coping with heavy metal stress is essential for elucidating their resilience in contaminated environments.However,whether cell wall exfoliation contributes to bacterial tolerance under heavy metal stress,such as cadmium(Cd)exposure,remains unclear and requires further investigation.In this study,we reveal a novel self-protective mechanism in Stenotrophomonas sp.H225 isolated from a Cd-contaminated farmland soil,which underwent controlled cell wall exfoliation and regeneration in response to Cd stress up to 200 mg L^(-1).Transmission electron microscopy and energy-dispersive X-ray spectroscopy analyses revealed that the exfoliated cell wall fragments served as extracellular Cd sinks,thereby reducing intracellular Cd accumulation.Fourier-transform infrared spectroscopy and enzyme-linked immunosorbent assay indicated progressive peptidoglycan(PG)degradation,with exfoliated PG concentration in solution increasing from 148 ng mL^(-1) at 0 mg L^(-1) Cd to 240 ng mL^(-1) at 200 mg L^(-1) Cd.This degradation was counteracted by the compensatory upregulation of PG biosynthesis genes,with the enrichment ratio reaching up to 0.83,facilitating cell wall reconstruction.Transcriptomic analysis and gene knockout experiments identified mtgA(encoding a monofunctional transglycosylase)as a key determinant in cell wall repair and Cd resistance.To our knowledge,this is the first mechanistic evidence that bacteria can mitigate heavy metal toxicity through dynamic cell wall remodeling involving exfoliation and regeneration.This finding enhances our understanding of microbial survival strategies under environmental stress and highlights potential targets for engineering metal-tolerant strains for bioremediation applications.展开更多
Background AFB_(1)-8,9-exo-epoxide(AFBO)is the highly toxic product of Aflatoxin B_(1)(AFB_(1)).Glutathione S-transferases(GSTs)play pivotal roles in detoxifying AFB_(1) by catalyzing the conjugation of AFBO with glut...Background AFB_(1)-8,9-exo-epoxide(AFBO)is the highly toxic product of Aflatoxin B_(1)(AFB_(1)).Glutathione S-transferases(GSTs)play pivotal roles in detoxifying AFB_(1) by catalyzing the conjugation of AFBO with glutathione(GSH).Although there are over 20 GST isozymes that have been identified in chicken,GST isozymes involved in the detoxification process of AFB_(1) have not been identified yet.The objective of this study was to determine which GST isozymes played key role in detoxification of AFB_(1).Results A total of 17 pcDNA3.1(+)-GST isozyme plasmids were constructed and the GST isozyme genes were overexpressed by 80–2,500,000 folds in the chicken Leghorn male hepatoma(LMH)cells.Compared to the AFB_(1) treatment,overexpression of GSTA2X,GSTA3,GSTT1L,GSTZ1-1,and GSTZ1-2 increased the cell viability by 6.5%–17.0%in LMH cells.Moreover,overexpression of five GST isozymes reduced the release of lactate dehydrogenase and reactive oxygen species by 8.8%–64.4%,and 57.2%–77.6%,respectively,as well as enhanced the production AFBO-GSH by 15.8%–19.6%,thus mitigating DNA damage induced by AFB_(1).After comprehensive evaluation of various indicators,GSTA2X displayed the best detoxification effects against AFB_(1).GSTA2X was expressed in Pichia pastoris X-33 and its enzymatic properties for catalyzing the conjugation of AFBO with GSH showed that the optimum temperature and pH were 20–25℃ and 7.6–8.6 as well as the enzymatic kinetic parameter V_(max) was 0.23 nmol/min/mg and the Michaelis constant was 86.05μmol/L with the AFB_(1) as substrate.Conclusions In conclusion,GSTA2X,GSTA3,GSTT1L,GSTZ1-1,and GSTZ1-2 played key roles in AFB_(1) detoxification,which will provide new remediation strategies to prevent aflatoxicosis in chickens.展开更多
RNA contains diverse post-transcriptional modifications,and its catabolic breakdown yields numerous modified nucleosides requiring correct processing,but the mechanisms remain unknown.Here,we demonstrate that three RN...RNA contains diverse post-transcriptional modifications,and its catabolic breakdown yields numerous modified nucleosides requiring correct processing,but the mechanisms remain unknown.Here,we demonstrate that three RNA-derived modified adenosines,N6-methyladenosine(m6A),N6,N6-dimethyladenosine(m6,6A),and N6-isopentenyladenosine(i6A),are sequentially metabolized into inosine monophosphate(IMP)to mitigate their intrinsic cytotoxicity.展开更多
Zearalenone(ZEN)is a non-steroidal estrogenic mycotoxin biosynthesized by the polyketide reaction,which has estrogenic effects and triggers toxic effects,such as reproductive toxicity,hepatotoxicity,genotoxicity,and i...Zearalenone(ZEN)is a non-steroidal estrogenic mycotoxin biosynthesized by the polyketide reaction,which has estrogenic effects and triggers toxic effects,such as reproductive toxicity,hepatotoxicity,genotoxicity,and immunotoxicity in organism.Due to its impact on human and animal health and the economic losses engendered by ZEN,detoxification strategies for contaminated foods and feeds to reduce or eliminate the toxic effects of ZEN by chemical,physical and biological methods are crucial.Detoxification by microbial means has broad application prospects,with the advantages of high efficiency,high specificity,mild conditions of action,no harmful metabolites,and safety.It may help to improve the function of intestinal barriers so that the intestinal epithelial barrier is more resistant to mycotoxins,and other pathogenic microorganisms.This article provided an overview of the metabolic pathways and animal toxicity of ZEN in organism,and summarized the effects of the current research status,detoxification mechanisms and in vivo applications of ZEN biodetoxification,in order to provide a reference for the prevention and control of ZEN.展开更多
With the pollution of heavy metals becoming more and more serious, hu- man health suffers from great harms, making the detoxification in human body admit of no delay. This paper summarized the heavy metals used for de...With the pollution of heavy metals becoming more and more serious, hu- man health suffers from great harms, making the detoxification in human body admit of no delay. This paper summarized the heavy metals used for detoxification in hu- man body in recent years, including metallothionein, polyphenols, dietary fibers from seaweed, GTS, and explored the detoxification mechanism of these heavy metals in human body.展开更多
The gastrointestinal tract is lined by a simple epithelium that undergoes constant renewal involving cell division, differentiation and cell death. In addition, the epithelial lining separates the hostile processes of...The gastrointestinal tract is lined by a simple epithelium that undergoes constant renewal involving cell division, differentiation and cell death. In addition, the epithelial lining separates the hostile processes of digestion and absorption that occur in the intestinal lumen from the aseptic environment of the internal milieu by defensive mechanisms that protect the epithelium from being breached. Central to these defensive processes is the synthesis of heme and its catabolism by heme oxygenase （HO）. Dietary heme is also an important source of iron for the body which is taken up intact by the enterocyte. This review describes the recent literature on the diverse properties of heme/HO in the intestine tract. The roles of heme/HO in the regulation of the cell cycle/ apoptosis, detoxification of xenobiotics, oxidative stress, inflammation, development of colon cancer, hemeiron absorption and intestinal motility are specifically examined.展开更多
Psoraleae Fructus(PF)is an important traditional herbal medicine with a long history of clinical application.It is widely used to treat various diseases,such as osteoporosis,leucoderma and diarrhea.As a traditional no...Psoraleae Fructus(PF)is an important traditional herbal medicine with a long history of clinical application.It is widely used to treat various diseases,such as osteoporosis,leucoderma and diarrhea.As a traditional nontoxic herb,it has aroused worldwide concern about the potential risks due to increasing adverse reaction events.This article reviews the botany,ancient records of medical uses,adverse reactions,toxicological research advance and detoxification methods of PF.According to clinical studies,liver injury is the most predominant in PF-related adverse reactions.The underlying mechanisms include bile acid metabolism and transport disorders,oxidative stress,mitochondrial damage,inhibition of liver cell regeneration and inflammatory reactions.Furthermore,the potential toxins of PF are summarized.Traditional methods of processing and compatibility will provide reference for reducing the toxicity of PF,which requires further research.In sum,this work systematically summarizes the reserach progress on the safety of PF,which will provide comprehensive insights into the toxicity of PF and facilitate its safe use and future development.展开更多
Coal gasification slag(CGS)is a type of solid waste produced during coal gasification,in which heavy metals severely restrict its resource utilization.In this work,the mineral occurrence and distribution of typical he...Coal gasification slag(CGS)is a type of solid waste produced during coal gasification,in which heavy metals severely restrict its resource utilization.In this work,the mineral occurrence and distribution of typical heavy metal Cr in CGS is investigated.The leaching behavior of Cr under different conditions is studied in detail.Acid leaching-selective oxidation-coprecipitation method is proposed based on the characteristics of Cr in CGS.The detoxification of Cr in CGS is realized,and the detoxification mechanism is clarified.Results show that Cr is highly enriched in CGS.The speciation of Cr is mainly residual fraction(74.47%-86.12%),which is combined with amorphous aluminosilicate.Cr^(3+)and Cr^(6+)account for 90.93%-94.82%and 5.18%-9.07%of total Cr,respectively.High acid concentration and high liquid-solid ratio are beneficial to destroy the lattice structure of amorphous aluminosilicate,thus improving the leaching efficiency of Cr,which can reach 97.93%under the optimal conditions.Acid leaching-selective oxidation-coprecipitation method can realize the detoxification of Cr in CGS.Under the optimal conditions,the removal rates of Fe^(3+)and Cr^(3+)in the leaching solution are 80.99%-84.79%and 70.58%-71.69%,respectively,while the loss rate of Al^(3+)is only 1.10%-3.35%.Detoxification slag exists in the form of Fe-Cr coprecipitation(Fe_(1-x)Cr_xOOH),which can be used for smelting.The detoxification acid leaching solution can be used to prepare inorganic polymer composite coagulant poly-aluminum chloride(PAC).This study can provide theoretical and data guidance for detoxification of heavy metal Cr in CGS and achieve resource utilization of coal gasification solid waste.展开更多
In the present study,we aimed to ascertain the metabolic detoxification routes of genipin via CYP3A4,SULT2 A1,and UGT1 A1 in Hepa RG cells.It was found that the hepatic CYP3A4,SULT2 A1,and UGT1 A1 synergistically medi...In the present study,we aimed to ascertain the metabolic detoxification routes of genipin via CYP3A4,SULT2 A1,and UGT1 A1 in Hepa RG cells.It was found that the hepatic CYP3A4,SULT2 A1,and UGT1 A1 synergistically mediated the metabolic detoxification of genipin,and the CYP3A4 was the limited enzyme.In detail,the pivotal detoxification pathway was CYP3A4-SULT2 A1/UGT1 A1,indicating that SULT2 A1 and UGT1 A1 further catalyzed the phase II detoxification metabolism followed by the genipin metabolization by CYP3A4 to the phase I metabolites with alleviated toxicity.Our findings provided valuable cues for future studies on the detoxification of genipin,even the compatibility detoxification of Zhi-zi.Moreover,these data facilitated the development and rational administration of genipin and Zhi-zi.展开更多
Deoxynivalenol(DON)is a mycotoxin that is produced by various species of Fusarium and is ubiquitous in food and feed.At low concentrations,it can cause metabolic disorders in animals and humans and,at high concentrati...Deoxynivalenol(DON)is a mycotoxin that is produced by various species of Fusarium and is ubiquitous in food and feed.At low concentrations,it can cause metabolic disorders in animals and humans and,at high concentrations,it can lead to pathological changes in the body.The impact of DON on human/animal health and animal productivity has thus attracted a great deal of attention around the world.DON causes severe damage to the intestine,including compromised intestinal barrier,mucosal damage,weakened immune function,and alterations in gut microbiota composition.These effects exacerbate intestinal infections and inflammation in livestock and poultry,posing adverse effects on overall health.Furthermore,research into biological methods for DON detoxification is a crucial avenue for future studies.This includes the utilization of adsorption,enzymatic degradation,and other biological approaches to mitigate DON's impact,offering new strategies for prevention and treatment of DON-induced diseases.Future research will focus on identifying highly efficient detoxifying microorganisms or enzymes to reduce DON levels in food and feed,thereby mitigating its risks to both animals and human health.展开更多
This study investigated the chromium(Cr)detoxification mechanism-induced changes in growth and antioxidant defence enzyme activities in Chrysopogon zizanioides.Plant growth decreased by 36.8%and 45.0%in the shoots and...This study investigated the chromium(Cr)detoxification mechanism-induced changes in growth and antioxidant defence enzyme activities in Chrysopogon zizanioides.Plant growth decreased by 36.8%and 45.0%in the shoots and roots,respectively,in the 50 mg/L Cr treatment.Cr accumulation was higher in root(9807μg/g DW)than in shoots(8730μg/g DW).Photosynthetic pigments and malondialdehyde content increased up to the 30 mg/L Cr treatment,whereas they declined at higher doses.The activity of superoxide dismutase(SOD),catalase(CAT)and peroxidase(POX)were increased significantly with increasing of Cr dose but slightly declined at higher doses.Isozyme banding patterns revealed the expression of multiple bands for SOD,CAT and POX enzymes,and the band intensity decreased at high doses of Cr exposure.These results indicate that higher Cr doses increased the oxidative stress by over production of reactive oxygen species(ROS)in vetiver that had potential tolerance mechanism to Cr as evidenced by enhanced level of antioxidative enzymes,photosynthetic pigments,MDA contents.Therefore,vetiver has evolved a mechanism for detoxification and accumulates higher concentration of toxic Cr.This study provides a better understanding of how vetiver detoxifies Cr.展开更多
Chuanwu(CW), a famous traditional Chinese medicine(TCM) from the mother roots of Aconitum carmichaelii Debx..(Ranunculaceae), has been used for the treatment of various diseases. Unfortunately, its toxicity is frequen...Chuanwu(CW), a famous traditional Chinese medicine(TCM) from the mother roots of Aconitum carmichaelii Debx..(Ranunculaceae), has been used for the treatment of various diseases. Unfortunately, its toxicity is frequently reported because of its narrow therapeutic window. In the present study, a metabolomic method was performed to characterize the phenotypically biochemical perturbations and potential mechanisms of CW-induced toxicity. Meanwhile, the expression level of toxicity biomarkers in the urine were analyzed to evaluate the detoxification by combination with Gancao(Radix Glyeyrrhizae, CG), Baishao(Radix Paeoniae Alba, CS) and Ganjiang(Rhizoma Zingiberis, CJ), which were screened from classical TCM prescriptions. Urinary metabolomics was performed by UPLC-Q-TOF-HDMS, and the mass spectra signals of the detected metabolites were systematically analyzed using pattern recognition methods. As a result, seventeen biomarkers associated with CW toxicity were identified, which were associated with pentose and glucuronate interconversions, alanine, aspartate, and glutamate metabolism, among others. The expression levels of most toxicity biomarkers were effectively modulated towards the normal range by the compatibility drugs. It indicated that the three compatibility drugs could effectively detoxify CW. In summary, our work demonstrated that metabolomics was vitally significant to evaluation of toxicity and finding detoxification methods for TCM.展开更多
Glucocorticoid(GC) plays an important role in anti-inflammatory,anti-allergic effects and immunosuppression,and has become a widely used drug in clinical departments.However,GC also produces a number of serious side e...Glucocorticoid(GC) plays an important role in anti-inflammatory,anti-allergic effects and immunosuppression,and has become a widely used drug in clinical departments.However,GC also produces a number of serious side effects at the same time.After GC acting on human body,the syndrome change has some regular pattern and it can be treated on the basis of syndrome differentiation and stage to aim at further improving therapeutic efficacy.The Chinese medicine can reduce the side effects of GC when treating the primary disease,thus plays a role in Synergism and Detoxification.展开更多
Selective detection of multiple analytes in a compact design with dual-modality and theranostic features presents great challenges. Herein, we wish to report a coumarin-thiazolidine masked D-penicillamine based dual-m...Selective detection of multiple analytes in a compact design with dual-modality and theranostic features presents great challenges. Herein, we wish to report a coumarin-thiazolidine masked D-penicillamine based dual-modality fluorescent probe COU-DPA-1 for selective detection, differentiation, and detoxification of multiple heavy metal ions(Ag^(+), Hg^(2+), Cu^(2+)). The probe shows divergent fluorescence(FL)/circular dichroism(CD) responses via divergent bond-cleavage cascade reactions(metal ion promoted C-S cleavage and hydrolysis at two distinctive cleavage sites): FL “turn-off” and CD “turn-on” for Ag+(no hydrolysis), FL “turn-on” and CD “turn-off” for Hg^(+)(imine hydrolysis), and FL “self-threshold ratiometric” and CD “turn-off” for excess Cu^(2+)(lactone and imine hydrolysis), providing the first example of a fluorescence/CD dual-modality probe for multiple species with complimentary responses. Moreover, the bond-cleavage cascade reactions also lead to the formation of D-penicillamine heavy metal ion complexes for potential detoxification treatments.展开更多
Electrochemical oxidation of aqueous tris(1,3-dichloro-2-propyl)phosphate(TDCPP)by using Ti/SnO_(2)-Sb/La-PbO_(2)as anode was investigated for the first time,and the degradation mechanisms and toxicity changes of the ...Electrochemical oxidation of aqueous tris(1,3-dichloro-2-propyl)phosphate(TDCPP)by using Ti/SnO_(2)-Sb/La-PbO_(2)as anode was investigated for the first time,and the degradation mechanisms and toxicity changes of the degradation intermediates were further determined.Results suggested that electrochemical degradation of TDCPP followed pseudo-first-order kinetics,and the reaction rate constant(k)was 0.0332 min^(−1)at the applied current density of 10 mA/cm^(2)and Na_(2)SO_(4)concentration of 10 mmol/L.There was better TDCPP degradation performance at higher current density.Free hydroxy radical(•OH)was proved to play dominant role in TDCPP oxidation via quenching experiment,with a relative contribution rate of 60.1%.A total of five intermediates(M1,C_(6)H_(11)Cl_(4)O_(4)P;M2,C_(3)H_(7)Cl_(2)O_(4)P;M3,C_(9)H_(16)Cl_(5)O_(5)P;M4,C_(9)H_(14)Cl_(5)O_(6)P;M5,C_(6)H_(10)Cl_(3)O_(6)P)were identified,and the intermediates were further degraded prolonging with the reaction time.Flow cytometer results suggested that the toxicity of TDCPP and degradation intermediates significantly reduced,and the detoxification efficiency was achieved at 78.1%at 180 min.ECOSAR predictive model was used to assess the relative toxicity of TDCPP and the degradation intermediates.The EC_(50)to green algae was 3.59 mg/L for TDCPP,and the values raised to 84,574,54.6,391,and 8920 mg/L for M1,M2,M3,M4,and M5,respectively,indicating that the degradation intermediates are less toxic or not toxic.Electrochemical advanced oxidation process is a valid technology to degrade TDCPP and pose a good detoxification effect.展开更多
Computational systems biology approaches provide insights to understand complex molecular phenomena in living systems. Such understanding demands the need to systematically interrogate and review existing literature t...Computational systems biology approaches provide insights to understand complex molecular phenomena in living systems. Such understanding demands the need to systematically interrogate and review existing literature to refine and distil key molecular pathways. This paper explores a methodological process to identify key molecular pathways from systematic bioinformatics literature review. This process is used to identify molecular pathways for a ubiquitous molecular process in all plant biological systems: C1 metabolism and formaldehyde detoxification, specific to maize. The C1 metabolism is essential for all organisms to provide one-carbon units for methylation and other types of modifications, as well as for nucleic acid, amino acid, and other biomolecule syntheses. Formaldehyde is a toxic one-carbon molecule which is produced endogenously and found in the environment, and whose detoxification is an important part of C1 metabolism. This systematic review involves a five-part process: 1) framing of the research question;2) literature collection based on a parallel search strategy;3) relevant study selection based on search refinement;4) molecular pathway identification;and 5) integration of key molecular pathway mechanisms to yield a well-defined set molecular systems associated with a particular biochemical function. Findings from this systematic review produced three main molecular systems: a) methionine biosynthesis;b) the methylation cycle;and c) formaldehyde detoxification. Specific insights from the resulting molecular pathways indicate that normal C1 metabolism involves the transfer of a carbon group from serine through a folate-mediated pathway to methionine, and eventually the methylation of a biomolecule. In photosynthetic tissues, C1 metabolism often proceeds in reverse towards serine biosynthesis and formate oxidation. C1 metabolism, in maize, appears to be present in the developing embryo and endosperm indicating that these cells are vulnerable to perturbations in formaldehyde detoxification. These insights demonstrate the value of a systematic bioinformatics literature review process from a broad spectrum of domain literature to specific and relevant molecular pathways.展开更多
The detoxification of iron cyanide in a soil–plant system was investigated to assess the total cyanide extracted from contaminated soil and allocated in the leaf tissue of willow trees(Salix caprea). They were grown ...The detoxification of iron cyanide in a soil–plant system was investigated to assess the total cyanide extracted from contaminated soil and allocated in the leaf tissue of willow trees(Salix caprea). They were grown in soil containing up to 1000 mg/kg dry weight(dw) of cyanide(CN),added as ^(15)N-labeled potassium ferrocyanide and prepared with a new method for synthesis of labeled iron cyanides. CN content and ^(15)N enrichment were monitored weekly over the exposure in leaf tissue of different age. The ^(15)N enrichment in the young and old leaf tissue reached up to 15.197‰ and 9063‰, respectively; it increased significantly over the exposure and with increasing exposure concentrations(p < 0.05). Although the CN accumulation in the old leaf tissue was higher, compared to the young leaf tissue(p < 0.05), the ^(15)N enrichment in the two tissue types did not differ statistically. This indicates a non-uniform CN accumulation but a uniform ^(15)N allocation throughout the leaf mass. Significant differences were detected between the measured CN content and the C^(15)N content, calculated from the ^(15)N enrichment(p < 0.05), revealing a significant CN fraction within the leaf tissue, which could not be detected as ionic CN. The application of labeled iron CN clearly shows that CN is detoxified during uptake by the willows. However, these results do not exclude other detoxification pathways, not related to the trees. Still, they are strongly indicative of the central role the trees played in CN removal and detoxification under the experimental conditions.展开更多
Background: Physical rehabilitation training as an effective measure was proposed by relevant government sector recently. Many compulsory isolated detoxification centers had already implemented the measure, but rarely...Background: Physical rehabilitation training as an effective measure was proposed by relevant government sector recently. Many compulsory isolated detoxification centers had already implemented the measure, but rarely a systematically comprehensive research was published. Therefore, the purpose of this paper was to evaluate the effect of “5433” training program as an exercise intervention on addicts during drug treatment and rehabilitation, in order to provide the experimental data for the research about the effects of mental quality and physical quality of addicts. Methods: The 2132 male addicts were randomly divided into experimental group (n = 1020) and control group (n = 1112), experimental group was training by “5433” program, and control group ordinary was managed alone. Before and after one year training, in accordance with the “SCL-90” and “Standards of People’s Republic of China national physique”, the SCL-90 scores, height/weight, vital capacity, step index, grip strength, vertical jump, push-ups, sit-and-reach, one-leg standing with eye-closed, choice reaction index of two groups were detected. Results: 1) The scores of depression, anxiety, paranoia and psychosis in two groups before the experiment are both lower than those after the experiment, and the experimental group decreased more (P 0.05). Conclusion:These initial findings show that The “5433” Training Program was effective more than a simple kinesiotherapy, thereby opening avenues for the rehabilitation of Chinese drug addicts.展开更多
基金Dalian Science and Technology Innovation Fund Project (2022JJ11CG008)。
文摘Aiming to provide a theoretical basis for possible uses of flaxseed as a food supplement and functional ingredient, the heat treatment of flaxseed was carried out using steaming, roasting, and microwave methods to investigate the detoxification effects of these three pretreatment methods on flaxseed, as well as the impact of the three methods on the quality of flaxseed. The results showed that all three pretreatment methods had better detoxification effects on flaxseed, in which, microwave treatment was the most effective method. After 5 min of microwave treatment, the hydrogen cyanide(HCN) content in flaxseed decreased from(94.65±1.68) mg/kg to(7.80±0.57) mg/kg. All three pretreatment methods significantly reduced the water content in flaxseed but had a weaker effect on protein, fat, and ash contents. After pretreatment by the three methods, the polyphenol content, peroxide value(POV), and a*value of flaxseed increased significantly, thiobarbituric acid reactive substances(TBARS) increased, while polyunsaturated fatty acids(PUFA) content, amino acid content, and L*, W*, and b*values decreased, with varying degrees of wrinkles and cracks appearing on the surface of flaxseed, and the overall signal pattern of FTIR spectra did not change much. During the 40℃ accelerated storage process, the quality of flaxseed treated by all three preheating methods generally declined, and correlation analysis revealed that color change was a good indicator of quality changes in flaxseed. Notably, all three pretreatment methods extended the shelf-life of flaxseed. Compared with steaming(120℃ for 20 min) and roasting(100℃ for 40 min), microwave(560 W for 4 min) is recommended to remove cyanogenic glycosides and improve the stability and quality characteristics of flaxseed.
基金the National Key Research and Development Program of China(Nos.2021YFA1202500 and 2022YFF1303004)Shenzhen Science and Technology Program(No.JCYJ20220531093205013)+6 种基金the National Natural Science Foundation of China(NSFC)(Nos.52100069,52270053 and 52200084)the Beijing Natural Science Foundation(No.8232035),the Beijing Nova Program(No.20220484215)the Beijing National Laboratory for Molecular Sciences(No.BNLMS2023011)Emerging Engineering Interdisciplinary-Young Scholars Project(Peking University),the Fundamental Research Funds for the Central Universities are greatly acknowledgedsupported by the High-Performance Computing Platform of Peking Universitythe National Key Scientific and Technological Infrastructure project“Earth System Numerical Simulation Facility”(EarthLab)are also acknowledgedsupported by the program of“Research on Advanced Treatment Technology of New Pollutants in Domestic Sewage of Residential District”.
文摘Simultaneous degradation and detoxification during pharmaceutical and personal care product removal are important for water treatment.In this study,sodium niobate nanocubes decorated with graphitic carbon nitride(NbNC/g-C_(3)N_(4))were fabricated to achieve the efficient photocatalytic degradation and detoxification of ciprofloxacin(CIP)under simulated solar light.NaNbO_(3)nanocubes were in-situ transformed from Na_(2)Nb_(2)O_(6)·H_(2)O via thermal dehydration at the interface of g-C_(3)N_(4).The optimized NbNC/g-C_(3)N_(4)-1 was a type-I heterojunction,which showed a high conduction band(CB)level of−1.68 eV,leading to the efficient transfer of photogenerated electrons to O_(2) to produce primary reactive species,•O_(2)^(-).Density functional theory(DFT)calculations of the density of states indicated that C 2p and Nb 3d contributed to the CB,and 0.37 e^(-)transferred from NaNbO_(3)to g-C_(3)N_(4)in NbNC/g-C_(3)N_(4)based on the Mulliken population analysis of the built-in electric field intensity.NbNC/g-C_(3)N_(4)-1 had 3.3-and 2.3-fold of CIP degradation rate constants(k_(1)=0.173 min^(−1))compared with those of pristine g-C_(3)N_(4)and NaNbO_(3),respectively.In addition,N24,N19,and C5 in CIP with a high Fukui index were reactive sites for electrophilic attack by•O_(2)^(-),resulting in the defluorination and ring-opening of the piperazine moiety of the dominant degradation pathways.Intermediate/product identification,integrated with computational toxicity evaluation,further indicated a substantial detoxification effect during CIP degradation in the photocatalysis system.
基金partially supported by the National Natural Science Foundation of China (Nos. 42377004 and 41991334)the Fundamental Research Funds for the Central Universities (No. 226-2025-0004)+1 种基金the China Agriculture Research System (No. CARS-01)the opportunity granted by the China Scholarship Council (No. 202406320448)
文摘Understanding bacterial strategies for coping with heavy metal stress is essential for elucidating their resilience in contaminated environments.However,whether cell wall exfoliation contributes to bacterial tolerance under heavy metal stress,such as cadmium(Cd)exposure,remains unclear and requires further investigation.In this study,we reveal a novel self-protective mechanism in Stenotrophomonas sp.H225 isolated from a Cd-contaminated farmland soil,which underwent controlled cell wall exfoliation and regeneration in response to Cd stress up to 200 mg L^(-1).Transmission electron microscopy and energy-dispersive X-ray spectroscopy analyses revealed that the exfoliated cell wall fragments served as extracellular Cd sinks,thereby reducing intracellular Cd accumulation.Fourier-transform infrared spectroscopy and enzyme-linked immunosorbent assay indicated progressive peptidoglycan(PG)degradation,with exfoliated PG concentration in solution increasing from 148 ng mL^(-1) at 0 mg L^(-1) Cd to 240 ng mL^(-1) at 200 mg L^(-1) Cd.This degradation was counteracted by the compensatory upregulation of PG biosynthesis genes,with the enrichment ratio reaching up to 0.83,facilitating cell wall reconstruction.Transcriptomic analysis and gene knockout experiments identified mtgA(encoding a monofunctional transglycosylase)as a key determinant in cell wall repair and Cd resistance.To our knowledge,this is the first mechanistic evidence that bacteria can mitigate heavy metal toxicity through dynamic cell wall remodeling involving exfoliation and regeneration.This finding enhances our understanding of microbial survival strategies under environmental stress and highlights potential targets for engineering metal-tolerant strains for bioremediation applications.
基金supported by the Chinese Natural Science Foundation Projects 32072775,32272915 and 32472949the National Key Research and Development Programs of China(2023YFD1301003 and 2023YFD1301005)the Fundamental Research Funds for the Central Universities(2662023DKPY002)。
文摘Background AFB_(1)-8,9-exo-epoxide(AFBO)is the highly toxic product of Aflatoxin B_(1)(AFB_(1)).Glutathione S-transferases(GSTs)play pivotal roles in detoxifying AFB_(1) by catalyzing the conjugation of AFBO with glutathione(GSH).Although there are over 20 GST isozymes that have been identified in chicken,GST isozymes involved in the detoxification process of AFB_(1) have not been identified yet.The objective of this study was to determine which GST isozymes played key role in detoxification of AFB_(1).Results A total of 17 pcDNA3.1(+)-GST isozyme plasmids were constructed and the GST isozyme genes were overexpressed by 80–2,500,000 folds in the chicken Leghorn male hepatoma(LMH)cells.Compared to the AFB_(1) treatment,overexpression of GSTA2X,GSTA3,GSTT1L,GSTZ1-1,and GSTZ1-2 increased the cell viability by 6.5%–17.0%in LMH cells.Moreover,overexpression of five GST isozymes reduced the release of lactate dehydrogenase and reactive oxygen species by 8.8%–64.4%,and 57.2%–77.6%,respectively,as well as enhanced the production AFBO-GSH by 15.8%–19.6%,thus mitigating DNA damage induced by AFB_(1).After comprehensive evaluation of various indicators,GSTA2X displayed the best detoxification effects against AFB_(1).GSTA2X was expressed in Pichia pastoris X-33 and its enzymatic properties for catalyzing the conjugation of AFBO with GSH showed that the optimum temperature and pH were 20–25℃ and 7.6–8.6 as well as the enzymatic kinetic parameter V_(max) was 0.23 nmol/min/mg and the Michaelis constant was 86.05μmol/L with the AFB_(1) as substrate.Conclusions In conclusion,GSTA2X,GSTA3,GSTT1L,GSTZ1-1,and GSTZ1-2 played key roles in AFB_(1) detoxification,which will provide new remediation strategies to prevent aflatoxicosis in chickens.
文摘RNA contains diverse post-transcriptional modifications,and its catabolic breakdown yields numerous modified nucleosides requiring correct processing,but the mechanisms remain unknown.Here,we demonstrate that three RNA-derived modified adenosines,N6-methyladenosine(m6A),N6,N6-dimethyladenosine(m6,6A),and N6-isopentenyladenosine(i6A),are sequentially metabolized into inosine monophosphate(IMP)to mitigate their intrinsic cytotoxicity.
基金Supported by China Agriculture Research System(CARS-35)the Natural Science Foundation of Heilongjiang Province of China(LH2021C038)。
文摘Zearalenone(ZEN)is a non-steroidal estrogenic mycotoxin biosynthesized by the polyketide reaction,which has estrogenic effects and triggers toxic effects,such as reproductive toxicity,hepatotoxicity,genotoxicity,and immunotoxicity in organism.Due to its impact on human and animal health and the economic losses engendered by ZEN,detoxification strategies for contaminated foods and feeds to reduce or eliminate the toxic effects of ZEN by chemical,physical and biological methods are crucial.Detoxification by microbial means has broad application prospects,with the advantages of high efficiency,high specificity,mild conditions of action,no harmful metabolites,and safety.It may help to improve the function of intestinal barriers so that the intestinal epithelial barrier is more resistant to mycotoxins,and other pathogenic microorganisms.This article provided an overview of the metabolic pathways and animal toxicity of ZEN in organism,and summarized the effects of the current research status,detoxification mechanisms and in vivo applications of ZEN biodetoxification,in order to provide a reference for the prevention and control of ZEN.
基金Supported by the National Key Technology R&D Program(2013BAD10B03)National High-tech R&D Program of China(2011AA100901)the National Natural Science Foundation of China(31201340,31201402)~~
文摘With the pollution of heavy metals becoming more and more serious, hu- man health suffers from great harms, making the detoxification in human body admit of no delay. This paper summarized the heavy metals used for detoxification in hu- man body in recent years, including metallothionein, polyphenols, dietary fibers from seaweed, GTS, and explored the detoxification mechanism of these heavy metals in human body.
文摘The gastrointestinal tract is lined by a simple epithelium that undergoes constant renewal involving cell division, differentiation and cell death. In addition, the epithelial lining separates the hostile processes of digestion and absorption that occur in the intestinal lumen from the aseptic environment of the internal milieu by defensive mechanisms that protect the epithelium from being breached. Central to these defensive processes is the synthesis of heme and its catabolism by heme oxygenase （HO）. Dietary heme is also an important source of iron for the body which is taken up intact by the enterocyte. This review describes the recent literature on the diverse properties of heme/HO in the intestine tract. The roles of heme/HO in the regulation of the cell cycle/ apoptosis, detoxification of xenobiotics, oxidative stress, inflammation, development of colon cancer, hemeiron absorption and intestinal motility are specifically examined.
基金supported by the Major Program of National Natural Science Foundation of China(Nos.82192910 and 82192911).
文摘Psoraleae Fructus(PF)is an important traditional herbal medicine with a long history of clinical application.It is widely used to treat various diseases,such as osteoporosis,leucoderma and diarrhea.As a traditional nontoxic herb,it has aroused worldwide concern about the potential risks due to increasing adverse reaction events.This article reviews the botany,ancient records of medical uses,adverse reactions,toxicological research advance and detoxification methods of PF.According to clinical studies,liver injury is the most predominant in PF-related adverse reactions.The underlying mechanisms include bile acid metabolism and transport disorders,oxidative stress,mitochondrial damage,inhibition of liver cell regeneration and inflammatory reactions.Furthermore,the potential toxins of PF are summarized.Traditional methods of processing and compatibility will provide reference for reducing the toxicity of PF,which requires further research.In sum,this work systematically summarizes the reserach progress on the safety of PF,which will provide comprehensive insights into the toxicity of PF and facilitate its safe use and future development.
基金finally supported by the National Natural Science Foundation of China(52174390,U1810205)Innovation Academy for Green Manufacture of the Chinese Academy of Sciences China(IAGM2022D04)Strategic Priority Research Program of the Chinese Academy of Sciences China(XDA21040601)。
文摘Coal gasification slag(CGS)is a type of solid waste produced during coal gasification,in which heavy metals severely restrict its resource utilization.In this work,the mineral occurrence and distribution of typical heavy metal Cr in CGS is investigated.The leaching behavior of Cr under different conditions is studied in detail.Acid leaching-selective oxidation-coprecipitation method is proposed based on the characteristics of Cr in CGS.The detoxification of Cr in CGS is realized,and the detoxification mechanism is clarified.Results show that Cr is highly enriched in CGS.The speciation of Cr is mainly residual fraction(74.47%-86.12%),which is combined with amorphous aluminosilicate.Cr^(3+)and Cr^(6+)account for 90.93%-94.82%and 5.18%-9.07%of total Cr,respectively.High acid concentration and high liquid-solid ratio are beneficial to destroy the lattice structure of amorphous aluminosilicate,thus improving the leaching efficiency of Cr,which can reach 97.93%under the optimal conditions.Acid leaching-selective oxidation-coprecipitation method can realize the detoxification of Cr in CGS.Under the optimal conditions,the removal rates of Fe^(3+)and Cr^(3+)in the leaching solution are 80.99%-84.79%and 70.58%-71.69%,respectively,while the loss rate of Al^(3+)is only 1.10%-3.35%.Detoxification slag exists in the form of Fe-Cr coprecipitation(Fe_(1-x)Cr_xOOH),which can be used for smelting.The detoxification acid leaching solution can be used to prepare inorganic polymer composite coagulant poly-aluminum chloride(PAC).This study can provide theoretical and data guidance for detoxification of heavy metal Cr in CGS and achieve resource utilization of coal gasification solid waste.
基金National Natural Science Foundation of China(Grant No.82174067,81960646 and 82004080)。
文摘In the present study,we aimed to ascertain the metabolic detoxification routes of genipin via CYP3A4,SULT2 A1,and UGT1 A1 in Hepa RG cells.It was found that the hepatic CYP3A4,SULT2 A1,and UGT1 A1 synergistically mediated the metabolic detoxification of genipin,and the CYP3A4 was the limited enzyme.In detail,the pivotal detoxification pathway was CYP3A4-SULT2 A1/UGT1 A1,indicating that SULT2 A1 and UGT1 A1 further catalyzed the phase II detoxification metabolism followed by the genipin metabolization by CYP3A4 to the phase I metabolites with alleviated toxicity.Our findings provided valuable cues for future studies on the detoxification of genipin,even the compatibility detoxification of Zhi-zi.Moreover,these data facilitated the development and rational administration of genipin and Zhi-zi.
基金funded by the National Natural Science Foundation of China(32273074,31972746,31872538 and 31772809)the Basic Scientific Research Project of Liaoning Provincial Department of Education,China(LJKZ0632)。
文摘Deoxynivalenol(DON)is a mycotoxin that is produced by various species of Fusarium and is ubiquitous in food and feed.At low concentrations,it can cause metabolic disorders in animals and humans and,at high concentrations,it can lead to pathological changes in the body.The impact of DON on human/animal health and animal productivity has thus attracted a great deal of attention around the world.DON causes severe damage to the intestine,including compromised intestinal barrier,mucosal damage,weakened immune function,and alterations in gut microbiota composition.These effects exacerbate intestinal infections and inflammation in livestock and poultry,posing adverse effects on overall health.Furthermore,research into biological methods for DON detoxification is a crucial avenue for future studies.This includes the utilization of adsorption,enzymatic degradation,and other biological approaches to mitigate DON's impact,offering new strategies for prevention and treatment of DON-induced diseases.Future research will focus on identifying highly efficient detoxifying microorganisms or enzymes to reduce DON levels in food and feed,thereby mitigating its risks to both animals and human health.
基金Project(41771512)supported by the National Natural Science Foundation of ChinaProject(2018RS3004)supported by Hunan Science&Technology Innovation Program,China
文摘This study investigated the chromium(Cr)detoxification mechanism-induced changes in growth and antioxidant defence enzyme activities in Chrysopogon zizanioides.Plant growth decreased by 36.8%and 45.0%in the shoots and roots,respectively,in the 50 mg/L Cr treatment.Cr accumulation was higher in root(9807μg/g DW)than in shoots(8730μg/g DW).Photosynthetic pigments and malondialdehyde content increased up to the 30 mg/L Cr treatment,whereas they declined at higher doses.The activity of superoxide dismutase(SOD),catalase(CAT)and peroxidase(POX)were increased significantly with increasing of Cr dose but slightly declined at higher doses.Isozyme banding patterns revealed the expression of multiple bands for SOD,CAT and POX enzymes,and the band intensity decreased at high doses of Cr exposure.These results indicate that higher Cr doses increased the oxidative stress by over production of reactive oxygen species(ROS)in vetiver that had potential tolerance mechanism to Cr as evidenced by enhanced level of antioxidative enzymes,photosynthetic pigments,MDA contents.Therefore,vetiver has evolved a mechanism for detoxification and accumulates higher concentration of toxic Cr.This study provides a better understanding of how vetiver detoxifies Cr.
基金supported by the Key Program of National Natural Science Foundation of China(Nos.81430093,81173500,81373930,81302905,81102556,and 81202639)National Key Subject of Drug Innovation(Nos.2015ZX09101043-005 and 2015ZX09101043-011)+1 种基金Heilongjiang University of Chinese Medicine Scientific Research Fund Projects(No.201307)Application Technology and Development of Youth Talents Project of Harbin,China(2014RFQXJ116)
文摘Chuanwu(CW), a famous traditional Chinese medicine(TCM) from the mother roots of Aconitum carmichaelii Debx..(Ranunculaceae), has been used for the treatment of various diseases. Unfortunately, its toxicity is frequently reported because of its narrow therapeutic window. In the present study, a metabolomic method was performed to characterize the phenotypically biochemical perturbations and potential mechanisms of CW-induced toxicity. Meanwhile, the expression level of toxicity biomarkers in the urine were analyzed to evaluate the detoxification by combination with Gancao(Radix Glyeyrrhizae, CG), Baishao(Radix Paeoniae Alba, CS) and Ganjiang(Rhizoma Zingiberis, CJ), which were screened from classical TCM prescriptions. Urinary metabolomics was performed by UPLC-Q-TOF-HDMS, and the mass spectra signals of the detected metabolites were systematically analyzed using pattern recognition methods. As a result, seventeen biomarkers associated with CW toxicity were identified, which were associated with pentose and glucuronate interconversions, alanine, aspartate, and glutamate metabolism, among others. The expression levels of most toxicity biomarkers were effectively modulated towards the normal range by the compatibility drugs. It indicated that the three compatibility drugs could effectively detoxify CW. In summary, our work demonstrated that metabolomics was vitally significant to evaluation of toxicity and finding detoxification methods for TCM.
基金Supported by Projects in the National Science & Technology Pillar Program in the Eleventh Five-year Plan Period (No. 2006BA104A10)State Traditional Chinese Medicine Department Research Foundation (No. 200707016)National Natural Science Foundation of China (No. 81072764)
文摘Glucocorticoid(GC) plays an important role in anti-inflammatory,anti-allergic effects and immunosuppression,and has become a widely used drug in clinical departments.However,GC also produces a number of serious side effects at the same time.After GC acting on human body,the syndrome change has some regular pattern and it can be treated on the basis of syndrome differentiation and stage to aim at further improving therapeutic efficacy.The Chinese medicine can reduce the side effects of GC when treating the primary disease,thus plays a role in Synergism and Detoxification.
基金supported by the National Natural Science Foundation of China (Nos. 21577037 and 21738002)the State Key Laboratory of Bioreactor Engineering, Shanghai Natural Science Fund (No. 20ZR1414700)+2 种基金Shanghai Sailing Program (No. 19YF1412500)Natural Science Basic Research Program of Shaanxi (No. 2019JQ-924)Key Breeding Program by Collaborative Innovation Center of Green Manufacturing Technology for Traditional Chinese Medicine in Shaanxi Province (No. 2019XT-1-03)。
文摘Selective detection of multiple analytes in a compact design with dual-modality and theranostic features presents great challenges. Herein, we wish to report a coumarin-thiazolidine masked D-penicillamine based dual-modality fluorescent probe COU-DPA-1 for selective detection, differentiation, and detoxification of multiple heavy metal ions(Ag^(+), Hg^(2+), Cu^(2+)). The probe shows divergent fluorescence(FL)/circular dichroism(CD) responses via divergent bond-cleavage cascade reactions(metal ion promoted C-S cleavage and hydrolysis at two distinctive cleavage sites): FL “turn-off” and CD “turn-on” for Ag+(no hydrolysis), FL “turn-on” and CD “turn-off” for Hg^(+)(imine hydrolysis), and FL “self-threshold ratiometric” and CD “turn-off” for excess Cu^(2+)(lactone and imine hydrolysis), providing the first example of a fluorescence/CD dual-modality probe for multiple species with complimentary responses. Moreover, the bond-cleavage cascade reactions also lead to the formation of D-penicillamine heavy metal ion complexes for potential detoxification treatments.
基金This study was financially supported by National Science Foundation(Nos.41907294,52000028 and 51878169)the Guangdong Innovation Team Project for Colleges and Universities(No.2016KCXTD023).
文摘Electrochemical oxidation of aqueous tris(1,3-dichloro-2-propyl)phosphate(TDCPP)by using Ti/SnO_(2)-Sb/La-PbO_(2)as anode was investigated for the first time,and the degradation mechanisms and toxicity changes of the degradation intermediates were further determined.Results suggested that electrochemical degradation of TDCPP followed pseudo-first-order kinetics,and the reaction rate constant(k)was 0.0332 min^(−1)at the applied current density of 10 mA/cm^(2)and Na_(2)SO_(4)concentration of 10 mmol/L.There was better TDCPP degradation performance at higher current density.Free hydroxy radical(•OH)was proved to play dominant role in TDCPP oxidation via quenching experiment,with a relative contribution rate of 60.1%.A total of five intermediates(M1,C_(6)H_(11)Cl_(4)O_(4)P;M2,C_(3)H_(7)Cl_(2)O_(4)P;M3,C_(9)H_(16)Cl_(5)O_(5)P;M4,C_(9)H_(14)Cl_(5)O_(6)P;M5,C_(6)H_(10)Cl_(3)O_(6)P)were identified,and the intermediates were further degraded prolonging with the reaction time.Flow cytometer results suggested that the toxicity of TDCPP and degradation intermediates significantly reduced,and the detoxification efficiency was achieved at 78.1%at 180 min.ECOSAR predictive model was used to assess the relative toxicity of TDCPP and the degradation intermediates.The EC_(50)to green algae was 3.59 mg/L for TDCPP,and the values raised to 84,574,54.6,391,and 8920 mg/L for M1,M2,M3,M4,and M5,respectively,indicating that the degradation intermediates are less toxic or not toxic.Electrochemical advanced oxidation process is a valid technology to degrade TDCPP and pose a good detoxification effect.
文摘Computational systems biology approaches provide insights to understand complex molecular phenomena in living systems. Such understanding demands the need to systematically interrogate and review existing literature to refine and distil key molecular pathways. This paper explores a methodological process to identify key molecular pathways from systematic bioinformatics literature review. This process is used to identify molecular pathways for a ubiquitous molecular process in all plant biological systems: C1 metabolism and formaldehyde detoxification, specific to maize. The C1 metabolism is essential for all organisms to provide one-carbon units for methylation and other types of modifications, as well as for nucleic acid, amino acid, and other biomolecule syntheses. Formaldehyde is a toxic one-carbon molecule which is produced endogenously and found in the environment, and whose detoxification is an important part of C1 metabolism. This systematic review involves a five-part process: 1) framing of the research question;2) literature collection based on a parallel search strategy;3) relevant study selection based on search refinement;4) molecular pathway identification;and 5) integration of key molecular pathway mechanisms to yield a well-defined set molecular systems associated with a particular biochemical function. Findings from this systematic review produced three main molecular systems: a) methionine biosynthesis;b) the methylation cycle;and c) formaldehyde detoxification. Specific insights from the resulting molecular pathways indicate that normal C1 metabolism involves the transfer of a carbon group from serine through a folate-mediated pathway to methionine, and eventually the methylation of a biomolecule. In photosynthetic tissues, C1 metabolism often proceeds in reverse towards serine biosynthesis and formate oxidation. C1 metabolism, in maize, appears to be present in the developing embryo and endosperm indicating that these cells are vulnerable to perturbations in formaldehyde detoxification. These insights demonstrate the value of a systematic bioinformatics literature review process from a broad spectrum of domain literature to specific and relevant molecular pathways.
基金financed by the project of the German Railways(Deutsche Bahn AG) "Stabilisation of the former manufactured gas plant site "ehemalige Leuchtgasanstalt" in Cottbus through means of bioremediation"
文摘The detoxification of iron cyanide in a soil–plant system was investigated to assess the total cyanide extracted from contaminated soil and allocated in the leaf tissue of willow trees(Salix caprea). They were grown in soil containing up to 1000 mg/kg dry weight(dw) of cyanide(CN),added as ^(15)N-labeled potassium ferrocyanide and prepared with a new method for synthesis of labeled iron cyanides. CN content and ^(15)N enrichment were monitored weekly over the exposure in leaf tissue of different age. The ^(15)N enrichment in the young and old leaf tissue reached up to 15.197‰ and 9063‰, respectively; it increased significantly over the exposure and with increasing exposure concentrations(p < 0.05). Although the CN accumulation in the old leaf tissue was higher, compared to the young leaf tissue(p < 0.05), the ^(15)N enrichment in the two tissue types did not differ statistically. This indicates a non-uniform CN accumulation but a uniform ^(15)N allocation throughout the leaf mass. Significant differences were detected between the measured CN content and the C^(15)N content, calculated from the ^(15)N enrichment(p < 0.05), revealing a significant CN fraction within the leaf tissue, which could not be detected as ionic CN. The application of labeled iron CN clearly shows that CN is detoxified during uptake by the willows. However, these results do not exclude other detoxification pathways, not related to the trees. Still, they are strongly indicative of the central role the trees played in CN removal and detoxification under the experimental conditions.
文摘Background: Physical rehabilitation training as an effective measure was proposed by relevant government sector recently. Many compulsory isolated detoxification centers had already implemented the measure, but rarely a systematically comprehensive research was published. Therefore, the purpose of this paper was to evaluate the effect of “5433” training program as an exercise intervention on addicts during drug treatment and rehabilitation, in order to provide the experimental data for the research about the effects of mental quality and physical quality of addicts. Methods: The 2132 male addicts were randomly divided into experimental group (n = 1020) and control group (n = 1112), experimental group was training by “5433” program, and control group ordinary was managed alone. Before and after one year training, in accordance with the “SCL-90” and “Standards of People’s Republic of China national physique”, the SCL-90 scores, height/weight, vital capacity, step index, grip strength, vertical jump, push-ups, sit-and-reach, one-leg standing with eye-closed, choice reaction index of two groups were detected. Results: 1) The scores of depression, anxiety, paranoia and psychosis in two groups before the experiment are both lower than those after the experiment, and the experimental group decreased more (P 0.05). Conclusion:These initial findings show that The “5433” Training Program was effective more than a simple kinesiotherapy, thereby opening avenues for the rehabilitation of Chinese drug addicts.
