Showing 5 results for Hair
N Okati, A Esmaili Sari, M Ghasempouri,
Volume 3, Issue 3 (10-2010)
Abstract
Backgrounds and Objectives: Mercury is a heavy metal that is widespread in the environment and has many toxic effects. At present, MeHg exposure on women remain an important issues for researching, especially those of continuous uptake in high-fish consumption.MeHg can be transferred to infant through breast milk. The objective of this study was to characterize the risk of Hg exposure in mothers in south of the Caspian Sea.
Materials and Methods: In this study mercury in hair of 70 breast-feeding women (17-36 years old) and influencing factor on it, were assessed. Mothers lives in nur, nowshahr and chamestan cities and villages of Nur and Nowshahr. In order to researching on influencing factors, mothers fill questionnaires. Hair samples (about 1 gr) were obtained from mothers. The mercury was measured by LECOAMA254AdvancedMercuryAnalyzer (USA) according toASTM, standard NO.D-6722.
Results: Total mean mercury concentration in mothers hair obtained 0.19±0.09 ( &mug gr-1). Tukey test show that the influence of the variables place of live (p=0.02), fish and sea food consumption of mother (P=0.00) were significantly affected on hair mercury concentration of mothers. The other factors (age and number of dental amalgam filling ) had no significant effect on mercury levels in hair of mothers.
Conclusion: Total mean mercury concentration in mothers hair were lesser than normal dose recommended byWHO (2&mug g-1) and EPA reference (5 &mug g-1). Analysis of questionnaires showed that three kinds of fish including carp, golden mulle and kutum. Although were often used in this study, mercury concentration in fish was not determined, but in according to significate relation between fish consumption and mercury concentration in mother#s hair, pollution with mercury in the fish can be the main factor of mercury exposure in this study.
Mehrnoosh Mohammadi, Alireza Riyahi Bakhtiari, Saber Khodabandeh,
Volume 6, Issue 4 (3-2014)
Abstract
Background and Objectives: Development of cosmetics industry has increased the affinity to use these products by people especially women for makeup and toilet. Due to the presence of metals such as lead and cadmium as preservative and colored element in these products, concentrations of these metals in sunscreen cosmetics, lipstick and hair color were determined. Materials and Methods: Different brands of cosmetics were analyzed to determine Cd and Pb concentration (in µg/kg dry weight) using graphite furnace atomic absorption (AA-670). Results: We found that generally mean concentration of Cd was lower than Pb. There was no significant difference of Cd level between different brands of sunscreen and lipstick (p>0.05), whereas, a significant difference of Pb between the brands studied was observed (p<0.05). No significant difference was obtained between concentration of Cd and Pb in various brands of hair color (p>0.05). Conclusion: Though levels of Pb and Cd in selected brands of cosmetics were lower than standard limits, their low concentration in compared with the results of previous research works could induce serious hazards on human health and the possibility of occurrence or exacerbation of disease including allergy, inflammation, skin diseases, cancer and so on. Hence, preparation and use of these products must be done according to current standards.
F Khalili, A.h Mahvi, S Nasseri, M Yunesian, B Djahed, M Yaseri,
Volume 9, Issue 1 (6-2016)
Abstract
Background and Objectives: Chemical hair color are one of the most widely used cosmetics. The presence of heavy metals in these products can affect the health of consumers. Unlike other cosmetics, no study has been conducted on the heavy metal levels in the synthetic chemical hair colors. This study determined the concentration of heavy metals in these products and the risk assessment of non-carcinogenic effects by these elements were calculated.
Material and Method: 32 samples of chemical hair color from eight brands (3 local and 5 imported ones) and four most used colors were collected from the markets in Tehran. The concentration of cadmium, lead, and barium was determined using ICP-MS. The information required to assess exposure risk was gathered through a questionnaire distributed among citizens of Tehran. The assessment of exposure was conducted using Mont Carlo method and non-carcinogenic risk was determined using the index of Hazard Quotient. .
Results: Barium concentration measured was 0.86 mg/kg and concentrations of Cadmium and Lead were 0.45 and 185.34 µg/kg respectively. Among the elements, Pb with Hazard Quotient equals to 7.46×10-4 had the most risk and cadmium with Hazard Quotient equals to 3.57×10-5 had the lowest risk. Moreover, the Iranian brand and blond had the highest risk among the samples.
Conclusion: Based on the index of Hazard Quotient, heavy metals in the studied samples had no risk for consumers of these products.
N Okati, A Esmaili-Sari,
Volume 10, Issue 2 (9-2017)
Abstract
Background and Objective: Information about the history of exposed individuals to mercury and monitoring mercury levels in body can be obtained by analyzing the longitudinal section of hair. The aim of this study was to analyze changes of mercury concentrations in hair length and daily mercury intake in women living in Bandar Abbas, Bushehr and Mahshahr cities.
Materials and Methods: In this cross-sectional and questionnaire study, 43 hair samples were randomly collected from women in fisher and non-fishermen families. Mercury concentrations were determined by LECO AMA 254, Advanced Mercury Analyzer (USA) according to ASTM standard NO.D-6722.
Results: The mean mercury concentration in hair was 2.31 μg/g. ANOVA test showed that there is no significant difference among the mercury concentrations in the various parts of hairs. The mean daily mercury intake was 0.24 μg/kg/day. Age, fish consumption, city of residence, fishermen and non-fishermen family had a statistically significant effect on the daily mercury intake in the women but the number of dental amalgam filling variable had no significant effect on the daily mercury intake.
Conclusion: During the 6 month period that the study was conducted, the methyl mercury uptake in the women was steady. The daily intake of mercury in 23% of the women was exceeded JECFA guidelines. Also, according to possible risks for mercury exposure, it is necessary to study on mercury risk assessment, considering all possible routes for mercury exposure in these cities.
Tahereh Ebrahimi, Khosro Piri, Asghar Abdoli, Masoud Tohidfar,
Volume 16, Issue 1 (6-2023)
Abstract
Background and Objective: The presence of toxic compounds, including phenol, due to industrial development, poses a threat to the environment. Utilizing hairy roots has emerged as a potential method to remove these toxins. This review aims to explore the efficacy of hairy roots in absorbing phenol pollutants and the influencing parameters.
Materials and Methods: This study was conducted using a descriptive-review method based on existing literature gathered from databases such as Science Direct, PubMed, and Google Scholar. The focus of the study was on the purification of phenol using hairy roots. Keywords such as Phytoremediation, Hairy root, Phenol, and Transgenic roots were used for data collection.
Results: Results show successful phenol removal by hairy roots, potentially attributed to abundant production of peroxidase enzymes. Various factors, such as hydrogen peroxide (H2O2), incubation time, pH, plant species, and pollutant concentration, impact phenol removal efficiency. Notably, plants like Brassica napus, rich in peroxidase enzymes, exhibit high efficiency in removing phenol pollution up to 500 mg/L, with H2O2 and within a pH range of 4-9.
Conclusion: In conclusion, hair roots possess significant adsorption capacity for phenol. However, phenol concentration, contact time, pH, and temperature influence their performance. Therefore, further research is required to explore optimal conditions for phenol removal.
