1
|
Priyadarshini E, Minzar M, Pandey S, Rawat K. Synergistic reduction of nitrophenols by Au-CDs nanoconjugates with NaBH 4. NANOTECHNOLOGY 2024; 35:275101. [PMID: 38502954 DOI: 10.1088/1361-6528/ad355a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/15/2023] [Accepted: 03/19/2024] [Indexed: 03/21/2024]
Abstract
Developing sustainable and innovative approaches for the efficient reduction of nitrophenols is crucial for environmental remediation, for managing health concerns posed by their widespread presence as hazardous pollutants in industrial effluents and contaminated water. We report the use of 12.9 ± 1 nm (TEM data) sized gold carbon dot nanoconjugates (Au@CDs) for catalytic conversion of o, m, p-nitrophenols to aminophenols by sodium borohydride. A simple approach was followed to synthesize ultra-small and highly stable Au@CDs, using citric acid and PEG as reducing and stabilizing agents. X-ray diffraction analysis verified the formation of nano-crystalline nanoconjugates. These nanoconjugates showed a remarkable catalytic activity in the range of 0.22-0.33 s-1(varying with nanoconjugate concentration) which was much higher compared to conventional chemical methods of reduction. All the catalytic reaction experiments were performed at room temperature (27 ± 2 °C). Furthermore, an increase in rate constant was observed with increasing concentration of nanoconjugates. The catalytic activity of Au@CDs nanoconjugates was observed to be in order of m-nitrophenol > o-nitrophenol > p-nitrophenol with apparent rate constant (kaap) values of 0.068, 0.043 and 0.031, respectively. Comparative analysis with GNPs, CDs and Au@CDs nanoconjugates stated that the nanoconjugates had superior catalytic activity. The research can have significant implications in the development of new strategies for environmental remediation and biomedical applications.
Collapse
Affiliation(s)
| | - Mohd Minzar
- Department of Chemistry, School of Chemical and Life Sciences, Jamia Hamdard, New Delhi, India
| | - Saurabh Pandey
- Department of Biochemistry, School of Chemical and Life Sciences, Jamia Hamdard, New Delhi, India
| | - Kamla Rawat
- Department of Chemistry, School of Chemical and Life Sciences, Jamia Hamdard, New Delhi, India
| |
Collapse
|
2
|
An SA, Lee J, Cha J, Gwak J, Kim M, Hur J, Hong S, Khim JS. Characterization of microalgal toxicants in the sediments from an industrial area: Application of advanced effect-directed analysis with multiple endpoint bioassays. ENVIRONMENT INTERNATIONAL 2023; 173:107833. [PMID: 36841187 DOI: 10.1016/j.envint.2023.107833] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/16/2022] [Revised: 01/08/2023] [Accepted: 02/14/2023] [Indexed: 06/18/2023]
Abstract
Microalgal toxicants in sediments from an industrialized area (Ulsan Bay) in South Korea were identified using effect-directed analysis (EDA) with full-scan screening analysis (FSA) and microalgal bioassays with multiple endpoints. The growth rate and cell viability of three microalgae (Isochrysis galbana, Dunaliella tertiolecta, and Phaeodactylum tricornutum) were strongly inhibited following exposure to raw organic extracts of sediments from Site D5 (Woehang River). The polar fraction separated using a silica gel column significantly inhibited growth rate, esterase activity, cell membrane intensity, and chlorophyll a autofluorescence. In comparison, non- and mid-polar fractions induced non-toxic or esterase inhibition. Target toxicants, such as polycyclic aromatic hydrocarbons, styrene oligomers, and alkylphenols, were detected at low concentrations (450, 79, and 98 ng g-1 dw, respectively) in the sediment of D5, indicating the presence of unmonitored toxicants. FSA was performed for the polar fraction using LC-QTOFMS, and 31 candidates of toxicants were selected. Toxicological confirmation was conducted for 7 candidates for which standards are available. Out of these, 2-nitrophenol, 3-nitrophenol, and 4-nitrophenol showed significant microalgal toxicity; however, these compounds did not fully explain the induced toxicity. Overall, combining EDA and FSA with multiple endpoint bioassays demonstrated the benefits of characterizing the microalgal toxicants in the environments.
Collapse
Affiliation(s)
- Seong-Ah An
- Department of Marine Environmental Science, Chungnam National University, Daejeon 34134, Republic of Korea
| | - Junghyun Lee
- School of Earth and Environmental Sciences & Research Institute of Oceanography, Seoul National University, Seoul 08826, Republic of Korea
| | - Jihyun Cha
- Department of Marine Environmental Science, Chungnam National University, Daejeon 34134, Republic of Korea
| | - Jiyun Gwak
- Department of Marine Environmental Science, Chungnam National University, Daejeon 34134, Republic of Korea
| | - Mungi Kim
- Department of Marine Environmental Science, Chungnam National University, Daejeon 34134, Republic of Korea
| | - Jin Hur
- Department of Environment and Energy, Sejong University, Seoul 05006, Republic of Korea
| | - Seongjin Hong
- Department of Marine Environmental Science, Chungnam National University, Daejeon 34134, Republic of Korea.
| | - Jong Seong Khim
- School of Earth and Environmental Sciences & Research Institute of Oceanography, Seoul National University, Seoul 08826, Republic of Korea.
| |
Collapse
|
3
|
Tannic Acid: A green and efficient stabilizer of Au, Ag, Cu and Pd nanoparticles for the 4-Nitrophenol Reduction, Suzuki-Miyaura coupling reactions and click reactions in aqueous solution. J Colloid Interface Sci 2021; 604:281-291. [PMID: 34271489 DOI: 10.1016/j.jcis.2021.07.015] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/17/2021] [Revised: 06/06/2021] [Accepted: 07/03/2021] [Indexed: 11/19/2022]
Abstract
Due to the good electrical, optical, magnetic, catalytic properties, transition metal nanoparticles (TMNPs) have been becoming more and more interesting in the fileds of environment, material, biomedicine, catalysis, and so on. Here, tannic acid (TA) is used as a green and efficient stabilizer to fabricate all kinds of TMNPs including AuNPs, AgNPs, CuNPs and PdNPs. These TMNPs possess small sizes ranging from 1 nm to 6 nm, which is conducive to several catalytic reactions in aqueous solution, such as 4-nitrophenol (4-NP) reduction, CuAAC reactions and Suzuki-Miyaura coupling reactions. AuNPs and PdNPs are found to have distinctly higher catalytic activities than AgNPs and CuNPs in the 4-NP reduction process. Especially, PdNPs show the highest catalytic activities with TOF up to 7200 h-1 in the 4-NP reduction. Furthermore, PdNPs also exhibit satisfying catalytic performance in the Suzuki-Miyaura coupling process, and CuNPs are catalytically active in the copper-catalyzed azide alkyne cycloaddition (CuAAC) reactions. The applicability and generality of PdNPs and CuNPs are respectively confirmed via the reaction between different substrates in the Suzuki-Miyaura coupling reactions and the CuAAC reactions. This work present a simple, fast, green and efficient strategy to synthesize TMNPs for multiple catalysis.
Collapse
|
4
|
Devi M, Dhir A, Pradeep CP. Facile Synthesis of Large Wrinkled Gold Nanoparticles Using Anthracene‐Terminated Tripodal Amine Ligand and their Catalytic Efficiency. Eur J Inorg Chem 2020. [DOI: 10.1002/ejic.202000755] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Manisha Devi
- School of Basic Sciences Indian Institute of Technology Mandi Mandi Kamand – 175005 Himachal Pradesh India
| | - Abhimanew Dhir
- Solid State and Structural Chemistry Unit Indian Institute of Science Bangalore India
| | - Chullikkattil P. Pradeep
- School of Basic Sciences Indian Institute of Technology Mandi Mandi Kamand – 175005 Himachal Pradesh India
| |
Collapse
|
5
|
Oueslati MH, Tahar LB, Harrath AH. Catalytic, antioxidant and anticancer activities of gold nanoparticles synthesized by kaempferol glucoside from Lotus leguminosae. ARAB J CHEM 2020. [DOI: 10.1016/j.arabjc.2018.09.003] [Citation(s) in RCA: 57] [Impact Index Per Article: 14.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022] Open
|
6
|
Gao M, Yang Y, Guo J. Revealing the Role of Chain Length of Ligands on Gold Nanoparticles Surface in the Process for Catalysis Reduction of 4-Nitrophenol. Catal Letters 2019. [DOI: 10.1007/s10562-019-02752-4] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
|
7
|
Miyamoto Y, Whiley PAF, Goh HY, Wong C, Higgins G, Tachibana T, McMenamin PG, Mayne L, Loveland KL. The STK35 locus contributes to normal gametogenesis and encodes a lncRNA responsive to oxidative stress. Biol Open 2018; 7:bio.032631. [PMID: 29970477 PMCID: PMC6124569 DOI: 10.1242/bio.032631] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022] Open
Abstract
Serine/threonine kinase 35 (STK35) is a recently identified human kinase with an autophosphorylation function, linked functionally to actin stress fibers, cell cycle progression and survival. STK35 has previously been shown to be highly expressed in human testis, and we demonstrated its regulation by nuclear-localized importin α2 in HeLa cells. The present study identifies progressive expression from the STK35 locus of two coding mRNA isoforms and one long non-coding RNA (lncRNA) in mouse testis during spermatogenesis, indicating their tightly controlled synthesis. Additionally, lncRNA transcripts are increased by exposure to oxidative stress in mouse GC-1 germ cell line. STK35 knockout (KO) mice lacking all three RNAs are born at sub-Mendelian frequency, and adults manifest both male and female germline deficiency. KO males exhibit no or partial spermatogenesis in most testis tubule cross-sections; KO ovaries are smaller and contain fewer follicles. Eyes of KO mice display phenotypes ranging from gross deformity to mild goniodysgenesis or iridocorneal angle malformation, to overtly normal. These findings demonstrate the tight regulation of transcription from the STK35 locus and its central importance to fertility, eye development and cell responses to oxidative stress. Summary: Transcripts from the STK35 locus impact on male and female fertility and on eye development. A lncRNA (Stk35os1) transcript from this locus is upregulated by oxidative stress.
Collapse
Affiliation(s)
- Yoichi Miyamoto
- Department of Biochemistry and Molecular Biology, School of Biological Sciences, Monash University, Wellington Road, Clayton, VIC 3800, Australia .,Laboratory of Nuclear Transport Dynamics, National Institutes of Biomedical Innovation, Health and Nutrition, 7-6-8 Saito-Asagi, Ibaraki, Osaka 567-0085, Japan
| | - Penny A F Whiley
- Department of Biochemistry and Molecular Biology, School of Biological Sciences, Monash University, Wellington Road, Clayton, VIC 3800, Australia.,Centre for Reproductive Health, Hudson Institute of Medical Research, 27-31 Wright Street, Clayton, VIC 3168, Australia
| | - Hoey Y Goh
- Department of Biochemistry and Molecular Biology, School of Biological Sciences, Monash University, Wellington Road, Clayton, VIC 3800, Australia
| | - Chin Wong
- Department of Biochemistry and Molecular Biology, School of Biological Sciences, Monash University, Wellington Road, Clayton, VIC 3800, Australia
| | - Gavin Higgins
- Department of Biochemistry and Molecular Biology, School of Biological Sciences, Monash University, Wellington Road, Clayton, VIC 3800, Australia
| | - Taro Tachibana
- Department of Bioengineering, Graduate School of Engineering, Osaka City University, Osaka 558-8585, Japan
| | - Paul G McMenamin
- Department of Anatomy and Developmental Biology, School of Biological Sciences, Monash Medical Centre, 246 Clayton Road, Clayton, VIC 3168, Australia
| | - Lynne Mayne
- Department of Biochemistry and Molecular Biology, School of Biological Sciences, Monash University, Wellington Road, Clayton, VIC 3800, Australia
| | - Kate L Loveland
- Centre for Reproductive Health, Hudson Institute of Medical Research, 27-31 Wright Street, Clayton, VIC 3168, Australia .,Department of Anatomy and Developmental Biology, School of Biological Sciences, Monash Medical Centre, 246 Clayton Road, Clayton, VIC 3168, Australia.,Department of Molecular and Translational Sciences, School of Clinical Sciences, Monash Medical Centre, 246 Clayton Road, Clayton, VIC 3168, Australia
| |
Collapse
|
8
|
Gürbüz MU, Ertürk AS. Synthesis and Characterization of Jeffamine Core PAMAM Dendrimer-Silver Nanocomposites (Ag JCPDNCs) and Their Evaluation in The Reduction of 4-Nitrophenol. JOURNAL OF THE TURKISH CHEMICAL SOCIETY, SECTION A: CHEMISTRY 2018. [DOI: 10.18596/jotcsa.428572] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022] Open
|
9
|
Nemanashi M, Meijboom R. “Cat in a bag” recycling of dendrimer encapsulated Au nanoparticles by use of dialysis membrane bag in the reduction of 4-nitrophenol: proof of heterogeneous catalysis. CATAL COMMUN 2016. [DOI: 10.1016/j.catcom.2016.05.007] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022] Open
|
10
|
Joseph S, Mathew B. Microwave assisted facile green synthesis of silver and gold nanocatalysts using the leaf extract of Aerva lanata. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2015; 136 Pt C:1371-1379. [PMID: 25459695 DOI: 10.1016/j.saa.2014.10.023] [Citation(s) in RCA: 67] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/25/2014] [Revised: 10/07/2014] [Accepted: 10/09/2014] [Indexed: 06/04/2023]
Abstract
Herein, we report a simple microwave assisted method for the green synthesis of silver and gold nanoparticles by the reduction of aqueous metal salt solutions using leaf extract of the medicinal plant Aerva lanata. UV-vis., FTIR, XRD, and HR-TEM studies were conducted to assure the formation of nanoparticles. XRD studies clearly confirmed the crystalline nature of the synthesized nanoparticles. From the HR-TEM images, the silver nanoparticles (AgNPs) were found to be more or less spherical and gold nanoparticles (AuNPs) were observed to be of different morphology with an average diameter of 18.62nm for silver and 17.97nm for gold nanoparticles. In order to evaluate the effect of microwave heating upon rate of formation, the synthesis was also conducted under ambient condition without the assistance of microwave radiation and the former method was found to be much faster than the later. The synthesized nanoparticles were used as nanocatalysts in the reduction of 4-nitrophenol to 4-aminophenol by NaBH4.
Collapse
Affiliation(s)
- Siby Joseph
- Department of Chemistry, St. George's College, Aruvithura, Kottayam 686 122, Kerala, India.
| | - Beena Mathew
- School of Chemical Sciences, Mahatma Gandhi University, Kottayam 686 560, Kerala, India.
| |
Collapse
|
11
|
Woo H, Kim JW, Kim M, Park S, Park KH. Au nanoparticles supported on magnetically separable Fe2O3–graphene oxide hybrid nanosheets for the catalytic reduction of 4-nitrophenol. RSC Adv 2015. [DOI: 10.1039/c4ra13989e] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023] Open
Abstract
A one-pot hydrothermal synthesis approach was developed to prepare FeSO4·(H2O)–graphene oxide (GO) nanosheets. Au nanoparticles were immobilized onto this support, giving Au/Fe2O3–GO nanocomposites.
Collapse
Affiliation(s)
- Hyunje Woo
- Department of Chemistry and Chemistry Institute for Functional Materials
- Pusan National University
- Busan 609-735
- Korea
| | - Ji Woong Kim
- Department of Physics
- Pusan National University
- Busan 609-735
- Korea
| | - Miran Kim
- Department of Chemistry and Chemistry Institute for Functional Materials
- Pusan National University
- Busan 609-735
- Korea
| | - Sungkyun Park
- Department of Physics
- Pusan National University
- Busan 609-735
- Korea
| | - Kang Hyun Park
- Department of Chemistry and Chemistry Institute for Functional Materials
- Pusan National University
- Busan 609-735
- Korea
| |
Collapse
|
12
|
Rengaraj D, Kwon WS, Pang MG. Effects of motor vehicle exhaust on male reproductive function and associated proteins. J Proteome Res 2014; 14:22-37. [PMID: 25329744 DOI: 10.1021/pr500939c] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Abstract
Air pollution is consistently associated with various diseases and subsequent death among children, adult, and elderly people worldwide. Motor vehicle exhaust contributes to a large proportion of the air pollution present. The motor vehicle exhaust systems emit a variety of toxic components, including carbon monoxide, nitrogen oxides, volatile organic compounds, ozone, particulate matter, and polycyclic aromatic hydrocarbons. Several epidemiological studies and laboratory studies have demonstrated that these components are potentially mutagenic, carcinogenic, and endocrine disrupting agents. However, their impact on male reproductive function and associated proteins is not very clear. Therefore, a comprehensive review on the effects of motor vehicle exhaust on male reproductive function and associated proteins is needed to better understand the risks of exhaust exposure for men. We found that motor vehicle exhaust can cause harmful effects on male reproductive functions by altering organ weights, reducing the spermatozoa qualities, and inducing oxidative stress. Remarkably, motor vehicle exhaust exposure causes significant changes in the expression patterns of proteins that are key components involved in spermatogenesis and testosterone synthesis. In conclusion, this review helps to describe the risks of vehicle exhaust exposure and its relationship to potential adverse effects on the male reproduction system.
Collapse
Affiliation(s)
- Deivendran Rengaraj
- Department of Animal Science & Technology, Chung-Ang University , Anseong, Gyeonggi-do 456-756, Republic of Korea
| | | | | |
Collapse
|
13
|
Woo H, Lee K, Park S, Park KH. Magnetically separable and recyclable Fe3O4-supported Ag nanocatalysts for reduction of nitro compounds and selective hydration of nitriles to amides in water. Molecules 2014; 19:699-712. [PMID: 24402201 PMCID: PMC6271850 DOI: 10.3390/molecules19010699] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2013] [Revised: 12/27/2013] [Accepted: 12/30/2013] [Indexed: 11/24/2022] Open
Abstract
As hybrid nanostructures have become more important in many fields of chemistry, Ag nanoparticles (NPs) are being increasingly immobilized onto Fe3O4 microspheres in situ. Structural characterization reveals that the Ag NPs are uniformly immobilized in the Fe3O4 microsphere-based supports. Moreover, Ag NPs are more stable in the hybrid structure than in the naked state and show high catalytic activity for the reduction of nitro compounds and hydration of nitriles to amides in water. The Fe3O4 microspheres were recycled several times using an external magnet.
Collapse
Affiliation(s)
- Hyunje Woo
- Department of Chemistry and Chemistry Institute for Functional Materials, Pusan National University, Busan 609-735, Korea.
| | - Kyoungho Lee
- Department of Chemistry and Chemistry Institute for Functional Materials, Pusan National University, Busan 609-735, Korea.
| | - Sungkyun Park
- Department of Chemistry and Chemistry Institute for Functional Materials, Pusan National University, Busan 609-735, Korea.
| | - Kang Hyun Park
- Department of Chemistry and Chemistry Institute for Functional Materials, Pusan National University, Busan 609-735, Korea.
| |
Collapse
|
14
|
Kaur R, Giordano C, Gradzielski M, Mehta SK. Synthesis of Highly Stable, Water-Dispersible Copper Nanoparticles as Catalysts for Nitrobenzene Reduction. Chem Asian J 2013; 9:189-98. [DOI: 10.1002/asia.201300809] [Citation(s) in RCA: 66] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/19/2013] [Indexed: 11/12/2022]
|
15
|
Bendi R, Imae T. Renewable catalyst with Cu nanoparticles embedded into cellulose nano-fiber film. RSC Adv 2013. [DOI: 10.1039/c3ra42689k] [Citation(s) in RCA: 68] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
|
16
|
Synthesis and characterization of Cu, Ag and Au dendrimer-encapsulated nanoparticles and their application in the reduction of 4-nitrophenol to 4-aminophenol. J Colloid Interface Sci 2013; 389:260-7. [DOI: 10.1016/j.jcis.2012.09.012] [Citation(s) in RCA: 214] [Impact Index Per Article: 19.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2012] [Revised: 09/07/2012] [Accepted: 09/11/2012] [Indexed: 02/03/2023]
|
17
|
Prenatal exposure to diesel exhaust particles and effect on the male reproductive system in mice. Toxicology 2009; 264:61-8. [DOI: 10.1016/j.tox.2009.07.012] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2009] [Revised: 07/10/2009] [Accepted: 07/17/2009] [Indexed: 11/17/2022]
|
18
|
Boggia B, Carbone U, Farinaro E, Zarrilli S, Lombardi G, Colao A, De Rosa N, De Rosa M. Effects of working posture and exposure to traffic pollutants on sperm quality. J Endocrinol Invest 2009; 32:430-4. [PMID: 19794293 DOI: 10.1007/bf03346481] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
An increasing difficulty of couples in achieving pregnancy related to male infertility has been reported. Several factors have been implicated as possible causes of this decrease, including the exposure to the endocrine disruptors and the environmental toxicants, the changes in lifestyle and the exposure to heat. The aim of this study was to evaluate the role of working posture when associated to nitrogen oxides exposure. Three hundred and seven male workers, employed in a motorway company, were enrolled into the study, underwent a complete physical examination and laboratory evaluations, endocrine screening and sperm analysis. Taking into account the exposure to fuel combustion gases and the working posture, sitting or free, the study population was divided in 4 groups. In the subjects occupationally exposed to NO2, a significant lower sperm total motility was observed than in not exposed workers. In the workers with obliged sitting working posture, lower sperm motility was also observed than in the workers with free working posture. Differences in sperm quality were strong when chemical and postural risk factors were associated. The findings of this study confirmed detrimental effects of nitrogen dioxide as a marker of traffic pollutants, showing alterations of sperm quality even if the environmental concentration of gas is very low according to the limits established by the Italian legislation. They suggest, also, the possible interaction between chemical exposure and obliged sitting position.
Collapse
Affiliation(s)
- B Boggia
- Department of Preventive Medical Sciences Unit of Occupational Medicine, Federico II University of Naples, Naples, Italy
| | | | | | | | | | | | | | | |
Collapse
|