Phytoreclamation of Abandoned Acid Mine Drainage Site After Treatment with Fly Ash

Acid mine drainage and coal fly ash both are the sibling products from man’s increasing demand for power. Mining of coal from coal mines generates acid mine drainage (AMD), and burning of coal for thermal power generation produces fly ash (FA). Although both are hazardous to the ecosystem and human health, reunion of them into one would reduce their toxic effect on nature. Mining causes exposure of hidden rock materials containing an abundance of sulphide to the atmosphere. Oxidation of the metal sulphides (pyrite, as iron sulphide) within the surrounding rock and overburden generates acidity. Subsurface mining that pumps out water to prevent flooding releases acidic water to nearby areas, known as acid mine drainage. Tailings piles, mine waste rock dumps, and coal spoils contribute in AMD. Improper disposal of the fly ash contaminates the soil, water and air by leaching of the pollutants or air borne particulate matters. However filler properties and presence of macronutrients makes fly ash an excellent filler material for mine sites, and its soil-like properties help in plant growth if provided with organic carbon and nitrogen. This chapter proposes development of a green cover into AMD site after treatment of the AMD site with FA

Assessment of oral health status and tobacco-related habits among the employees of North-West Karnataka Road Transport Corporation (NWKRTC), Belagavi City - A Cross-Sectional Study

Introduction: Transport workers have a very haphazard and incongruent schedule which makes it difficult for them to follow proper oral hygiene practices. The prevalence of tobacco habits is also found to be high due to their long periods of work and constant stress. This study aimed to assess the oral health status and tobacco habits of the government bus drivers and conductors of NWKRTC, Belagavi City, Karnataka.  Methods: A descriptive cross-sectional study was conducted on 451 Government Bus drivers and other employees of NWKRTC who gave consent for the study. WHO Oral Health Assessment Form 2013 was used to record the oral health status and a self-designed, validated questionnaire was employed for recording the oral hygiene practices and tobacco-related habits. Descriptive statistics and Chi-Square was used for statistical analysis.    Results: The mean age of the employees of NWKRTC is 43.55 years and there are 414 males as compared to only 37 females. The mean DMFT score was 5.55±3.08. 228 of them had some kind of tobacco habit with guthka (25.9 percent) being the most prevalent one. 57 employees had manifestations of leukoplakia and OSMF. There was an association between tobacco habits and oral mucosal lesions as well as the DMFT score. Conclusion: The Oral Health Status of the Government employees of NWKRTC is poor. It is further compounded by the high prevalence of tobacco habits and associated lesions and it is a problem that needs to be addressed immediately

Characterization of a Fourth Tungsten-Containing Enzyme from the Hyperthermophilic Archaeon Pyrococcus furiosus

Pyrococcus furiosus grows optimally near 100°C using peptides and carbohydrates as carbon sources, and it reduces elemental sulfur (S(0)), if present, to H(2)S. Tungsten (W), an element rarely used in biology, is required for optimal growth, and three different tungsten-containing enzymes have been previously purified from this organism. They all oxidize aldehydes of various types and are thought to play primary roles in the catabolism of sugars or amino acids. Here, the purification of a fourth tungsten-containing enzyme, termed WOR 4, from cell extracts of P. furiosus grown with S(0) is described. This was achieved by monitoring through multiple chromatography steps the W that is not associated with the three characterized tungstoenzymes. The N-terminal sequence of WOR 4 and the approximate molecular weight of its subunit determined electrophoretically (69,000) correspond to the product of an ORF (PF1961, wor4) present in the complete genome sequence of P. furiosus. WOR 4 is a homodimer and contains approximately one W, three Fe, three or four acid-labile sulfide, and one Ca atom per subunit. The visible and electron paramagnetic resonance spectra of the oxidized and reduced enzyme indicate the presence of an unusual iron-sulfur chromophore. WOR 4 does not oxidize aliphatic or aromatic aldehydes or hydroxy acids, nor does it reduce keto acids. Consistent with prior microarray data, the protein could not be purified from P. furiosus cells grown in the absence of S(0), suggesting that it may have a role in S(0) metabolism

Formaldehyde Ferredoxin Oxidoreductase from Pyrococcus furiosus: The 1.85 Å Resolution Crystal Structure and its Mechanistic Implications

Crystal structures of formaldehyde ferredoxin oxidoreductase (FOR), a tungstopterin-containing protein from the hyperthermophilic archaeon Pyrococcus furiosus, have been determined in the native state and as a complex with the inhibitor glutarate at 1.85 Å and 2.4 Å resolution, respectively. The native structure was solved by molecular replacement using the structure of the homologous P. furiosus aldehyde ferredoxin oxidoreductase (AOR) as the initial model. Residues are identified in FOR that may be involved in either the catalytic mechanism or in determining substrate specificity. The binding site on FOR for the physiological electron acceptor, P. furiosus ferredoxin (Fd), has been established from an FOR-Fd cocrystal structure. Based on the arrangement of redox centers in this structure, an electron transfer pathway is proposed that begins at the tungsten center, leads to the (4Fe:4S) cluster of FOR via one of the two pterins that coordinate the tungsten, and ends at the (4Fe:4S) cluster of ferredoxin. This pathway includes two residues that coordinate the (4Fe:4S) clusters, Cys287 of FOR and Asp14 of ferredoxin. Similarities in the active site structures between FOR and the unrelated molybdoenzyme aldehyde oxidoreductase from Desulfovibrio gigas suggest that both enzymes utilize a common mechanism for aldehyde oxidation

Formaldehyde Ferredoxin Oxidoreductase

Formaldehyde ferredoxin oxidoreductase (FOR) is a homotetramer where each subunit contains a [4Fe–4S] cluster and a mononuclear tungsten atom coordinated by the dithioline groups of two pterin molecules. It is a member of a family of five closely related tungstoenzymes found in organisms that grow at high temperatures in marine volcanic vents. FOR catalyzes the two-electron oxidation of its aldehyde substrate to the corresponding acid with the concomitant reduction of ferredoxin, its physiological electron acceptor. FOR oxidizes short chain C_1-C_4 aldehydes as substrates but has the highest affinity for C_4-C_6 di- and semialdehydes. The enzyme is proposed to have a role in peptide metabolism

Aldehyde Ferredoxin Oxidoreductase

Aldehyde ferredoxin oxidoreductase (AOR) is a homodimer where each subunit contains a [4Fe–4S] cluster and a mononuclear tungsten atom coordinated by the dithioline groups of two pterin molecules. The two subunits of the dimer are bridged by a monomeric iron site. AOR is a member of a family of five closely related tungstoenzymes found in organisms that grow at high temperatures in marine volcanic vents. The enzyme catalyzes the two-electron oxidation of its aldehyde substrate to the corresponding acid with the concomitant reduction of ferredoxin, its physiological electron acceptor. The enzyme can oxidize a wide range of aliphatic and aromatic aldehydes. The most efficient substrates for AOR are acetaldehyde, isovaleraldehyde, phenylacetaldehyde, and indoleacetaldehyde, the aldehyde derivatives of some of the most common amino acids

Knowledge, attitude, and practices toward tobacco control among rural community health care workers of primary subcenters in Belagavi district, Karnataka

Context: Tobacco is the common cause to a number of illnesses affecting millions of individuals all over the world. Primary care physicians are the initial point of contact for tobacco users, yet reaching everyone is impossible. Therefore, it is important to understand community health workers attitude to render community services in tobacco cessation counseling. Aim: To assess knowledge, attitude, practices, and occupational barriers toward tobacco control among community health care workers in Belagavi district, Karnataka. Settings and Design: This cross-sectional study was conducted in various subcenters of Belagavi district, Karnataka. Methods and Material: Simple random sampling technique was employed and 220 participants were interviewed using an interviewer administered questionnaire comprising of 22 close ended questions. Reliability of the questionnaire assessed with Cronbach's α value of 0.85, face validity 84%, and content validity ratio 0.78. Statistical Analysis Used: The data were analyzed using descriptive analysis, chi square analysis, correlation, and regression. Results: The mean knowledge score among Accredited Social Health Activist (ASHA) workers was 4.77 ± 2.11 and it was lower in Anganwadi workers 2.93 ± 2.55. There was a statistically significant difference in the attitude scores (P < 0.05) between the community health workers. The majority of the ASHA workers would spread awareness, on the other hand, Anganwadi workers did not take any specific step which showed statistically significant difference with a P value of 0.018. Conclusion: ASHA workers had been superior to Anganwadi workers with regard to knowledge and attitude toward tobacco control. However, knowledge regarding tobacco and its ill effects was below optimal level among community health workers which desires to thoroughly educate in the aspects of oral health and disorders as part of their training