• Title, Summary, Keyword: bisphenol A (BPA)

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Evaluation of Bisphenol A-Epichlorohydrin Exposure Workers in Apartment Building Construction: Pilot Study (아파트 건축 작업장에서 사용되는 에피클로로하이드린-비스페놀A의 노출 평가: 파일럿 연구)

  • Shin, Wonho;Moon, Chan-Seok
    • Journal of Korean Society of Occupational and Environmental Hygiene
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    • v.26 no.4
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    • pp.396-403
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    • 2016
  • Objectives: The study is to evaluate biological monitoring and risk assessment for epichlorohydrin-bisphenol A resin exposed from waterproofing or finishing work in the apartment building construction. Methods: Subjected workers were working on spray-painting and waterproofing work for 8 hours per day every 20 days. The urine samples were collected at the end of 20 days working period. For urinary bisphenol A as metabolite from epichlorohydrin-bisphenol A exposure, urine samples were analyzed with liquid chromatography mass-mass spectrometry(HPLC-MS/MS). Results: Geometric means of urinary bisphenol A(BPA) with no hydrolysis and with enzymic hydrolysis(BPA-EH) in the workers were $1.10{\mu}g/L$ and $2.90{\mu}g/L$. BPA-EH was 4 times higher than that of control group. The factors for working period and ages did not affect the variation of BPA and BPA-EH. The levels for BPA and BPA-EH were not higher than 95th percentile for exposure on human-life environment. Conclusions: The BPA and BPA-EH were therefore effective biological markers for epichlorohydrin-bisphenol A exposure workers, but not seem to hazardous exposure level. Waterproofing work in construction workshop is required to measuring work environment and health care management for the workers.

Screening of Peptide Sequences with Affinity to Bisphenol A by Biopanning (바이오패닝에 의한 Bisphenol A 친화성 펩타이드 서열의 탐색)

  • Yoo, Ik-Keun;Choe, Woo-Seok
    • Korean Journal of Microbiology
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    • v.49 no.2
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    • pp.211-214
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    • 2013
  • Bisphenol A (BPA) is a highly hazardous component to human since it is regarded as one of endocrine disruptors. For the analysis and/or removal of BPA, the searching for the specific ligand with a selective affinity to target BPA is required. In order to find the peptide moiety that specifically binds to BPA, the ultrasound-assisted biopanning was carried out with a phage-displayed peptide library expressing constrained heptamer. After six rounds of positive screening against BPA particles followed by the negative screening against the surface of eppendorf tube, the peptide sequence (CysLysSerLeuGluAsnSerTyrCys) with affinity to BPA was screened based on the order of frequency from the screened phage clones. To further verify the specificity of screened peptide sequence, the cross-binding affinity of the phage peptide toward BPA analogues such as Bisphenol S (BPS) and Bisphenol F (BPF) was also assessed, where the selected phage peptide showed a higher affinity to BPA over BPS and BPF.

Current State of Use and the Risks of Bisphenols: A Minireview (비스페놀류의 사용 현황과 위해성: 소고)

  • Song, Chang Yeob;Kim, Woong;Gye, Myung Chan
    • Korean Journal of Environmental Biology
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    • v.35 no.4
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    • pp.581-594
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    • 2017
  • Bisphenol A(BPA), known as a typical endocrine disruptor, has been used commercially and widely for plastics and epoxy resins. BPA-based plastic is used extensively for the production of water bottles, food containers, CDs, DVDs, and panels that can be applied in construction. Epoxy resins containing BPA are used for coatings on the insides of water pipes, food cans, and thermal papers that are used in sales receipts. As its estrogenic effects and other adverse health effects have published, BPA has been regulated in many countries, and there have been efforts made to replace BPA. Other bisphenols substitutes such as bisphenol S(BPS) and bisphenol F(BPF) have been used. Currently, BPS- and BPF-based products labeled BPA-free products have been widely consumed. Because of structural similarities with BPA, however, these alternatives also show endocrine disruption effects like BPA, and many studies on adverse health effects of these alternatives are being reported. In this review, we describe the adverse health effects of bisphenols and the current status of regulation.

Evaluation of Bisphenol a Induced Apoptosis in Sertoli Cell-lines (Bisphenol A에 의한 Sertoli 세포주 내 세포자연사 검정)

  • Kim, Ji-Hyang;Kim, Jin-Kyu;Do, Byoung-Rok;Lee, Chang-Joo;Yoon, Yong-Dal
    • Development and Reproduction
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    • v.9 no.2
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    • pp.115-121
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    • 2005
  • The present report aimed at evaluating the effect of bisphenol A(BPA) and diethylstilbestrol(DES) on Leydig or Sertoli cell-lines. To identify the differences in the susceptibility to BPA upon different cell-types, assay of the cell viability was done on TM3(Leydig cells) and TM4(Sertoli cells) cell-lines. The result indicates that Sertoli cells are more sensitive to low dose of BPA than Leydig cells. Also, the BPA- or DES-treated Sertoli cells showed a reduction of phospholipase D(PLD) activity identically. According to the confirmation of the mRNA expression of fas receptor and fas ligand in the BPA-treated cells, fas/fasL system activated by BPA will deliver the apoptosis signal onto Sertoli TM4 cells. However, Fas/FasL system was not activated in the DES-treated cells unlike the BPA-treated cells.

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Effects of Subacute Oral Administration of Bisphenol A on the IgM-PFC and Proliferation of Splenocytes in Mice (마우스에서 Bisphenol A의 아급성노출이 IgM-PFC형성능과 비장세포 증식능에 미치는 영향)

  • 변정아;표명윤
    • Environmental health and toxicology
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    • v.18 no.3
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    • pp.231-235
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    • 2003
  • To determine whether or not bisphenol A affects the Immune system, female ICR mice were treated bisphenol A (BPA) orally at the doses of 100, 500 and 1,000 mg/kg for 30 consecutive days. Four days before enumerating Plaque -forming cells (PFCs) mice were immunized intraperitoneally with sheep red blood cells (SRBCs). The spleen cellularity and PFC/spleen were significantly reduced by 30-day exposure to BPA (1,000 mg/kg/day), but the PFC/10$\^$6/ spleen cells was slightly decreased.. When splenocytes isolated from the mice exposed to BPA for 30 days were cultured in the presence of LPS, Con A or PHA with IL-2, the lymphocyte proliferation ex vivo was not significantly suppressed by BPA. Our present results indicated that 30-day exposure of mice to BPA might have mild immunotoxic potential.

Bisphenol-A Removal in Conventional Water Treatment Systems (정수처리공정에서 bisphenol-A의 제거에 관한 연구)

  • 김혜리;이윤진;박선구;남상호
    • Journal of Environmental Health Sciences
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    • v.30 no.1
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    • pp.59-64
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    • 2004
  • This study was carried out to investigate influencing factors of bisphenol A(BPA) removal characteristic in conventional water treatment systems to be connected with coagulation, sedimentation, filtration and disinfection. The result are summarized as follows; In BPA removal, optimal doses of PAC, alum, ferric chloride were 7.5 mg Al/L, 10.0 mg AI/L, 15.0 mg Fek. PAC was most effective coagulant to remove BPA. In coagulation process, BPA removal efficiency were increased about 2% by adjusting pH of raw water as 6. At temperature rise 1$0^{\circ}C$, BPA removal efficiency were increased 0.94%. but BPA removal efficiency in sand filtration process were under 1 %ie, so that BPA was almost not removed. At free chlorine dose 1, 2 mg/L, the reaction rate constant k in the BPA removal have been calculated to be 0.397, 0.953 min$^{-1}$ . At free chlorine dose 1, 2 mg/1-, degradation reaction of BPA was completed during 10 min and BFA removal efficiencies were 97.66, 99.99% at this time.

Application of Manganese Oxide for the Oxidative Degradation of Bisphenol-A in Aqueous Phase (망간산화물을 이용한 수용액내 Bisphenol-A의 산화 반응성 평가)

  • Jee, Sang-Hyun;Ko, Seok-Oh
    • Journal of Korean Society on Water Environment
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    • v.23 no.5
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    • pp.659-664
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    • 2007
  • The objective of this study is to evaluate the detoxification method for the endocrine disrupting chemicals by manganese oxide. Manganese coated sand and bisphenol-A (BPA) was used as the reactive medium and the contaminant. Results showed that manganese oxide effectively degrades BPA by oxidative coupling reaction. The nonlinear oxidative coupling reaction orders were obtained for BPA and oxide, respectively. The reaction rate of BPA decreased as initial BPA concentration increased, as oxide loading decreased and as pH increased. The higher ionic strength, the higher reaction rate was observed. Divalent cations were adsorbed on the oxide surfaces, resulting in the decreased degradation rate of BPA.

Effects of Acute Oral Administration of Bisphenol A on the Immune Function in Mice (Bisphenol A의 급성노출이 마우스의 면역기능에 미치는 영향)

  • 표명윤;변정아
    • YAKHAK HOEJI
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    • v.45 no.1
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    • pp.55-63
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    • 2001
  • In order to investigate the effects of bisphenol A (BPA) on immune system in mice we examined the various immunological parameters. After single oral administration of BPA to female ICR mice, the weights of bodies and lymphoid organs, splenic cellularity and hematological parameters were examined on day 2 and 7. Among them WBC and splenic cellularity were slightly decreased on day 2. To assess the effects of BPA on humoral immune responses, splenic IgM plaque forming cell (PFC) and serum IgM were assayed. When BPA was administered after immunization with SRBC, but not before immunization, IgM PFC against SRBC was significantly lowered in a dose dependent manner. Serum IgM level was also decreased on day 4 when high dose (2000 mg/kg) of BPA was administrated after injection of OVA-antigen. The indexes of splenocyte proliferation (SP) to concanavalin A (Con A) and bacterial lipopolysaccharide (LPS) were measured in vitro by MTT assay. At low concentration BPA slightly increased splenocyte proliferation but at higher concentration it showed significant inhibitory effects on cell proliferation. Mitogen-stimulated SP was also determined with spleen cells from BPA treated mice. Con A-induced SP was slightly decreased and LPS-induced SP was especially inhibited at 1000 mg/kg and 2000 mg/kg of BPA. These results indicate that BPA is able to acutly evoke humoral and cell mediated immune suppression in mice.

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Optimization of Bisphenol A Biodegradation by Trametes versicolor (Trametes versicolor에 의한 Bisphenol A 생분해의 최적조건)

  • Kang, Ae-Ri;Choi, Hyoung-Tae;Song, Hong-Gyu
    • Korean Journal of Microbiology
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    • v.44 no.1
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    • pp.37-42
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    • 2008
  • Optimal conditions for the biodegradation of endocrine-disrupting bisphenol A (BPA) were examined for the white rot fungus Trametes versicolor isolated in Korea. T. versicolor degraded 100% of 50 mg/L bisphenol A during 12 hr in yeast extract-malt extract-glucose (YMG) medium. When BPA was added to the 5-day preincubated fungal culture in YMG medium, all BPA was removed in 2 hr. T. versicolor could efficiently degrade BPA at $35^{\circ}C$, pH 6 in YMG medium. T. versicolor could more easily remove BPA of $1{\sim}25\;mg/L$ than that of higher concentrations ($50{\sim}100\;mg/L$) in YMG medium. T. versicolor degraded 100% of 50 mg/L BPA for 36 h in a minimal medium, which is lower degradation rate than that in YMG medium. Optimal conditions for BPA biodegradation in the minimal medium were similar to those in YMG medium. When BPA (50 mg/L) was added into domestic wastewater, it could be completely removed by T. versicolor. During the biodegradation of BPA by T. versicolor in YMG medium, its estrogenic activity decreased.

Synthesis of Bishydroxyethyl Ether of Bisphenol A(BHE-BPA) Through the Depolymerization of Polycarbonate (폴리카보네이트 해중합을 이용한 Bisphenol A계 Bishydroxyethyl Ether 화합물 생성 특성)

  • Heo, Miseon;Kim, Beomsik;Park, Youin;Han, Myungwan
    • Korean Chemical Engineering Research
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    • v.48 no.2
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    • pp.164-171
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    • 2010
  • Recently, the waste of Polycarbonate(PC) is increase with the increase in demand of a polycarbonate. It is concerned with producing a new material and diol monomer, bishydroxyethyl ether of bisphenol A(BHE-BPA) through depolymerization of the polycarbonate waste at recycling. BHE-BPA can be used as a good raw material for the synthesis of polycarbonate type polyurethane. PC particles were depolymerized with base-catalyst NaOH, solvent EG, and ethylene carbonate(EC) was formed during the PC depolymerziation. EC was added to promote the conversion from bispenol-A to BHE-BPA. The characteristics of depolymeraion of polycarbonate as well as conversion of bispenol-A to BHE-BPA were investigated. BHE-BPA yield of 92% was obtained at temperature $220^{\circ}C$, 10% catalyst/PC mole ratio, 20 mmol of EC. BHE-BPA purity of better than 99% was achieved by crystallization of BHE-BPA.