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化学品对于提升人类生活品质具有重要价值，同时也带来了健康风险。家用化学品是化学品的组 成部分，与家庭生活密切相关，即便是在家庭中有孕妇的情况下，家用化学品的使用仍然不可避免。近 些年，家用化学品对孕妇健康影响的研究成为国内外研究热点，胎儿身处母体子宫内，二者的健康状况 联系极其紧密，彼此影响显著，现有研究往往将孕妇和胎儿合并展开。研究者通常采用问卷调查，血液 挥发性有机物提取，尿液中挥发性有机物的代谢产物提取，头发的化验，采样空气对挥发性有机物暴露 的评估等方式获得数据，现有研究成果不同程度证实了孕妇接触家用化学品存在健康风险。本文就家 用化学品对孕妇血压、糖尿病、咳嗽和早产等的影响方面深入探讨，梳理了乙苯、氯乙烯等对孕妇有害的 有机化学物的暴露源，提出选择化学品替代品等孕妇安全使用家用化学品的合理建议，对于孕妇保障自 身和胎儿健康有着重要的意义。 [ABSTRACT FROM AUTHOR]

[Objective] Screening and obtaining the antagonistic actinomycetes with significant antifungal activity against the pathogen of Sarcandra glahra, for the theoretical foundation for biological control of anthracnose. [Method] The actinomycetes were isolated by root soil of health S. glabra using spread plate method, and the highest antifungal activity of strain was screened by the method of plate confrontation, and using in vitro leaf stabbing wound inoculation method to screen the control effect of antagonistic strain against anthracnose of S. glabra. Moreover, the species was identified through morphological characterization and 16 S rDNA sequence by establishing a phylogenetic tree to analyze its classification status. [Result] By plate confrontation and antibacterial spectrum test, the results showed that the JT-2 F was isolated from soil had the highest antagonistic effect against anthracnose of S. gfubra, resulting in the hyphae being swelled and deformed, the antagonism rate was 86. 75%. Antibacterial spectrum tests showed it had antagonistic activities to 14 plant pathogens, whose average inhibition rate was 81. 50%. Based on morphological characters and 16S rDNA sequence analysis, strain JT-2F was identified as Streptomyces tsukiyonensis. In vitro control effect test results showed that the fermentation broth of JT-2F strain had 87. 32 % control effect on anthracnose of S. glabra. [Conclusion ] JT-2F has development and application potential as biocontrol material for anthracnose of S. glabra. [ABSTRACT FROM AUTHOR]

[Objective] The present paper aimed to screen, isolate and identify the high-yield lignocellulose-degrading endophytic fungi from Taxillus chinensis (DC.) seeds, and provide technical support for the acquisition of lignocellulose-degrading enzymes with strong capacity and T. chinensis artificial cultivation. [Method] The endophytic fungi of T. chinensis seeds were isolated by conventional tissue separation method. Wheat bran was used as substrate for lignin biomass. The activities of laccase, lignin peroxidase, manganese peroxidase and cellulose degrading enzyme were determined by ABTS method, veratrol method, phenol red method and cellulase (CL) activity detection kit. The strains with strong lignocellulosic degradation ability were screened and their classification status was determined according to morphological characteristics and phylogenetic tree analysis. (Result) Four high-yielding lignocellulosic degrading strains (15H3, 2013, 106 and 10y11) were selected from the 57 strains of endophytic fungi from T. chinensis seeds. Among them, the lignin peroxidase activity of strain 15H3 and the manganese peroxidase activity of strain 2013 reached the peak when cultured in the crude enzyme solution of endophytic fungi from T. chinensis seeds for 11 days, they were 7.14 and 11.69 U/mL, respectively. At 9 days, the laccase activity of strain 106, cellulase activity of strain 2013, the manganese peroxidase activity of strain 10y11 were the highest, which were 57.98,0.32 and 8.56 U/mL, respectively. By morphological observation and molecular biology identification, strain 15H3 and 2013 could be identified as Pestalotiopsis arceuthobii and Coniella pseudogranati, respectively. Strains 106 and 10y11 were identified as Fusarium incarnatum. [Conclusion] The endophytic fungi P. arceuthobii, C. pseudogranati and F. incarnatum with high production of lignocellulosic degrading enzymes were screened and identified from T. chinensis seeds, which could provide theoretical basis for the study of the degradation mechanism of T. chinensis invasion into host cell wall and provide data support for the breeding of T. chinensis. [ABSTRACT FROM AUTHOR]