Risk Analysis of Big Data Based on Cloud Computing for the Inspection and Testing of Toxic and Hazardous Substances in Meat Products

Large-scale data emerge in food safety inspection and testing industry with the development of Internet technology in China.This paper was aimed at designing toxic and hazardous substance big data risk analysis algorithm in food safety inspection and testing based on cloud computing^([1]).Cloud computing platform was set up to store the massive extensive data with geographical distribution,dynamic and high complexity from the Internet,and MapReduce^([2]) computational framework in cloud computing was applied to process and compute parallel data.The risk analysis results were obtained by analyzing 1000000 meat products testing data collected from the laboratory management information system based on web.The results show that food safety index IFS < 1,which proves that the food safety state is in good condition.

Safe antifungal lipopeptides derived from Bacillus marinus B-9987 against grey mold caused by Botrytis cinerea

Agricultural application studies, including field experiments and acute toxicity tests, were conducted for lipopeptides secreted by marine-derived Bacillus marinus B-9987. Benefiting from commercially available scaled-up lipopeptide purification, the sample of impurities（isolated from target lipopeptides）, raw extracted sample（purity： 9.08%）, partially purified sample（purity： 20.86%）, and highly purified sample（purity： 87.51%） were prepared from B. marinus B-9987 fermentation broth, and used in lab-scale antagonism tests, field experiments, swarming motility tests, and acute toxicity tests. Operations and conditions in field experiments were consistent with the Pesticide-Guidelines for the Field Efficacy Trials（GB/T 17980.28-2000）, and acute toxicity tests were executed according to Toxicological Test Methods of Pesticides for Registration（GB 15670-1995）. In agar diffusion tests in vitro and pot tests in vivo, all lipopeptide samples with different purities significantly inhibited Botrytis cinerea; meanwhile the sample of impurities isolated from target lipopeptides were not effective against B. cinerea. Results of lab-scale tests showed that the target lipopeptides were effective substances against B. cinerea. Thus, partially purified and raw extracted samples were used in field experiments instead of the highly purified sample for cost saving. In the field experiments against rose grey mold, biological control efficacy of 500 mg L–1 lipopeptides reached 67.53%, slightly lower than 74.05% reached by the agrochemical pyrimethanil. However, pyrimethanil severely suppressed B. marinus B-9987, whereas the lipopeptides promoted swarming motility and biocontrol efficacy of Bacillus biomass. Lipopeptides at 87.51% purity were tested for systemic acute toxicity and confirmed as low-toxicity substances. In conclusion, low-toxicity lipopeptides were potential alternatives to agrochemicals, and they also performed good promotion when combined with homologous biological control microorganism. There were 2 breakthroughs in this research：（1） marine-derived bacterial lipopeptides inhibited grey mold caused by B. cinerea in field experiments; and（2） purified bacterial lipopeptides（sample purity： 〉87.51%） were determined to be low-toxicity substances by systemic acute toxicity tests, satisfying the strict requirement of pesticide registration in China（required purity： 〉85%）. This study provides support for using extracellularBacillus-derived lipopeptides commercially similar to Bacillus-based biological control agents.

Study on the removal of toxic substance from river water using O_3-GAC process

This paper studied on the removal of toxic substance from river water using O3-GAC process. The result of GC/MS analysis indicated that the number of organic compound species was decreased by 55.1%. The species of toxic substance of raw water also decreased from 16 to 5. The total removal rate of CODMn andUV254 were 45%～72% and 60%～80% following O3-GAC treatment. It reflected that this process had a good effective on removing unsaturation organic which absorb UV and toxic organic containing nitrogen. The results of Ames test indicated that raw water had a relatively strong mutagicity on TA 98. The O3-GAC process had a good ability in removing mutagen in water. The effluent water’s mutagicity is minus. The results of the study indicated that the effluent of the O3-GAC process was meet the demand of drinking water.

Effect of Removing Toxic Substances Combined with Activating Blood Circulation on Stabilizing the Atherosclerotic Plaque and Unstable Angina

The therapeutic effects of activating blood circulation to remove stasis of Chinese medicine （CM） in the prevention and treatment of atherosclerotic diseases such as coronary artery disease and angina are generally acknowledged. In recent years, to further improve the therapeutic effects of those Chinese herbs on such diseases, we have carried out a series of studies of CM medications with the function of clearing heat and removing toxic substances combined with activating blood circulation to remove stasis.

Extinction in a discrete Lotka-Volterra competitive system with the effect of toxic substances and feedback controls

In this paper, we consider a discrete Lotka-Volterra competitive system with the effect of toxic substances and feedback controls. By using the method of discrete Lyapunov function and by developing a new analysis technique, we obtain the sufficient conditions which guarantee that one of the two species will be driven to extinction while the other will be permanent. We improve the corresponding results of Li and Chen [Extinction in two-dimensional discrete Lotka Volterra competitive system with the effect of toxic substances, Dynam. Contin. Discrete Impuls. Syst. Ser. B Appl. Algorithms 15 （2008） 165-178]. Also, an example together with their numerical simulations shows the feasibility of our main results. It is shown that toxic substances and feedback control variables play an important role in the dynamics of the system.

EXTINCTION IN A GILPIN-AYALA COMPETITION SYSTEM WITH THE EFFECT OF TOXIC SUBSTANCES

In this paper,we consider a two dimensional Gilpin-Ayala competition system with the effect of toxic substances.We prove that one of components is driven to extinction while the other one is stable under some conditions.As a result,we generalize the previous results.

EXTINCTION OF A DISCRETE COMPETITIVE SYSTEM WITH BEDDINGTON-DEANGELIS FUNCTIONAL RESPONSE AND THE EFFECT OF TOXIC SUBSTANCES

In this paper, we consider a discrete competitive system with BeddingtonDe Angelis functional response and the effect of toxic substances. By constructing some suitable Lyapunov type extinction functions, sufficient conditions which guarantee the extinction of a species and global attractivity of the other one are obtained. Our results not only supplement and improve but also generalize some existing ones. Numerical simulations show the feasibility of our results.

A systematic review on the safety of Psoraleae Fructus:potential risks,toxic characteristics,underlying mechanisms and detoxification methods

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.

Clinical Observation on the Treatment of Childhood Refractory Idiopathic Thrombocytopenic Purpura with Dihuang Zhixue Capsule(地黄止血胶囊)

Objective： To observe the clinical effect of Dihuang Zhixue Capsule （地黄止血胶囊, DZC, a Chinese preparation for cooling blood and dispelling toxic substances） in the treatment of childhood refractory idiopathic thrombocytopenic purpura （RITP）, with cyclosporin A （CsA） used as the control. Methods： Forty-one children of RITP were randomized into the treated group and the control group. The 21 patients in the treated group were orally given 2 to 3 DZC capsules each time, thrice a day and the 20 in the control group were given 3 mg/kg CsA per day, with 3 months as one therapeutic course. The therapeutic efficacy, platelet count and adverse reaction in the two groups were compared at the end of the course. Results： （1） In the treated group, 1 （4.8%） patient was evaluated as cured, 3 （14.3%） as markedly effective, 5 （23.8%） as effective, 5 （23.8%） as improved, 7 （33.3%） as ineffective, with the total effective rate being 66.7%; while in the control group, the corresponding numbers were 0. 2 （10.0%）, 2 （10.0%）, 3 （15.0%）, 13 （65.0%） and 35.0%, respectively, showing statistical significance in difference between the total effective rates of the two groups （ Х^2=4.11, P=0.0426）. （2） As compared with the baseline, the platelet count increased in both groups after 2 months＇ treatment （P〈0.05）. After 3 months＇ treatment, the platelet count was higher in the treated group than in the control group （P〈0.05）. （3） The improvement of hemorrhage in the treated group after 8 weeks＇ treatment was better than that in the control group （P〈0.05）. （4） No apparent adverse reaction was observed in the treated group, while in the control group, hirsutism was shown in 15 cases; gingival hyperplasia in 10; digestive reaction in 5, liver function impairment in 5, hypertension in 2 and renal impairment in 2. Conclusion： The therapeutic efficacy of DZC is better than that of CsA, and DZC shows good compliance but brings no obvious adverse reaction.

DYNAMIC BEHAVIOURS OF AN AUTONOMOUS STAGE-STRUCTURED COMPETITIVE SYSTEMS WITH TOXIC EFFECT

An autonomous stage-structured competitive systems with toxic effect is investigated in this paper. Sufficient conditions which guarantee the global attractivity of the system and the extinction of the partial species are obtained, respectively. Our results supplement and compliment one of the main results of Liu and Li [Global stability analysis of a nonautonomous stage-structured competitive system with toxic effect and double maturation delays, Abstract and Applied Analysis, Volume 2014, Article ID 689573, 15 pages].