Oxidation of the iodide ion is an important facet of the solar cells such as perovskite solar cells and dye-sensitized solar cells. The rate of reaction undoubtedly depends upon several factors. Such parameters include reaction media, electrolyte, and the nature of solvents, and electrolyte. If these factors are optimized then the rate of the reaction can be controlled and could be used to get the maximum benefit out of it such as economically and industrially cost-effective uses of the reaction and globally environmentally benign. We studied the kinetics of the oxidation of the iodide ion in the binary solvent system that consisted of 10% (v/v) tertiary butyl alcohol and water. The transition metal complex such as dicyanobis(phenanthroline)iron(III) oxidizes the iodide ion spontaneously without any external triggering with a fast rate at 293 ± 1 K. The reaction was probed under the pseudo-first-order condition with an excess concentration of the iodide ion over dicyanobis(phenanthroline)iron(III) at 0.06 M ionic strength. The reaction was observed independent of the concentration of dicyanobis(phenanthroline)iron(III), that is, the zero order and third order with respect to the iodide ion in the selected solvent system. An overall third-order was observed for the redox reaction. The value of the multiplication product of the molar absorptivity (ɛ), path length of the cuvette (b), and overall rate constant (k) was deduced to be 1.59 × 10 6 M −3 s −1. The observed zero-order rate constant of the reaction was increased by the fractional (1.5) power of the concentration of protons in the excess concentration of acid 1 mM to 0.1 M. The multiplication product of ɛ⋅b to the fractional order rate constant (k′) was found 0.773 M −1.5 s −1 that confirms protonation of triiodide in acidic-10% (v/v) tertiary butyl alcohol-water. The effect of ionic strength showed a similar impact in different compositions of solvents such as 5, 10, and 20% (v/v) tertiary butyl alcoholwater. The observed zero-order rate constant was decreased upon increasing the ionic strength in each medium consisting of the binary solvent system.
Background. Drugs induced liver injury is a major health problem.1 Methotrexate which is antagonist of folic acid is used to treat different types of neoplasms, rheumatoid arthritis and psoriasis.2 The therapeutic applications of Methotrexate is usually limited by its severe Hepatotoxicity. Herbs play important role for the treatment of various liver diseases.3 Turmeric (Curcuma Longa L, zingiberaceae) is used to treat cancer, inflammatory disorders, hepatitis and other liver disorders, skin diseases, Alzheimer’s disease, rheumatoid arthritis.4 Study Design: Laboratory based randomized controlled trial. Setting: Animal House of IBMS (Institute of Basic Medical Science), by the permission of Ethical Committee of (KMU) Khyber Medical University Hayatabad Peshawar. Period: March to September 2018. Material & Methods. 28 adult male albino mice were divided into control Group A and experimental Groups B,C and D. Group B was given Turmeric extract per oral (400mg /kg) daily for 14 days. Group C was given Injection Methotrexate (40mg/kg) intraperitoneally (I.P) on day 7. Group D was given Turmeric extract per oral (400mg /kg) daily for 7 days as pre administration to injection Methotrexate and on day 7 injection Methotrexate (40mg/kg) was given intraperitoneally (I.P) and Turmeric extract per oral (400mg/kg) was given daily for further 7 days as post administration to injection Methotrexate. Histological slides were prepared to see the effects of Turmeric plus Methotrexate on diameter of central vein and congestion in central vein. Results: The histological examination of liver sections of control group. A showed normal appearance of central vein. In Turmeric treated group (Group B) also no obvious histological changes were observed. Examination of liver tissue of Group C (Methotrexate group) showed severe histological changes which include dilation and congestion of central vein. Group D (Methotrexate + Turmeric group) showed significant reduction in dilation and congestion of central vein. Conclusion: This study is in accordance with other studies in which different types of herbals showed protective effects on Methotrexate induced liver damage.
Objective:To find out the incidence of congenital talipes equinovarus in children presenting at District Headquarter Teaching Hospital, Swabi.Materials and Methods:This study was of one year duration and was carried out at District Headquarter Teaching Hospital, Swabi.The record of 988 children presenting in the orthopedic ward for surgery were studied.Results:A total of 96 (9.7%) children presented with congenital talipes equinovarus or club foot and out of these children 56 (5.7%) patients were males and 40 (4.04%) were female.Conclusion:Clubfoot or congenital talipes equinovarus is one of the most common abnormality of the foot and idiopathic talipes equinovarus is most common in the population of Swabi.It is more common in males and is mostly bilateral. It should be detected at birth and treated early to prevent permanent disability.
Objective: To assess the relationship between the fingerprint pattern and gender Materials and Methods:A cross-sectional study conducted having 400 healthy medical and dental students of Khyber Medical College and Khyber College of dentistry, Peshawar. The study was done by categorizing the pattern into arches, loops and whorls. The statistical analysis was done by using frequency distribution and non-parametric test i.e. chi square test. A P value of < 0.05 was considered statistically significant.Results: The fingerprint pattern prevalence showed that the predominant pattern was 58.55% (loops) followed by 32.65% (whorl) and 8.8% (arch). A significant relationship between the fingerprint patterns and gender (P < 0.05) was also observed.Conclusion: The conclusions drawn from the study is that loops are the most commonly found finger print pattern and arches are the least common in both male and females
β-expansin 2 (EXPB2) gene induces drought tolerance in different plant species including maize. Different epigenetic mechanisms like DNA methylation, histone modification and RNA interference affect the gene activities under stress conditions. DNA methylation, an important epigenetic mechanism, could be involved in the regulation of ZmEXPB2 gene under drought stress in maize. Plants of drought sensitive variety „Jalal‟ were grown till 4th leaf stage under well-watered conditions. At 5th leaf stage, plants were divided in two groups i.e., well-watered (100% water holding capacity) or drought stress (0% water holding capacity for 15 days). Plants subjected to drought stress showed clear signs of stress by significant decrease in fresh weight of whole plant, 6th leaf length, stunted secondary root growth and increased primary root length. DNA methylation profile of three regions (denoted as -1.7 k, -1.3 k and -0.8 k) in the promoter of ZmEXPB2 gene, of root DNA, were evaluated. Under well-watered conditions, heterogeneity in DNA methylation profile along the promoter sequence was observed. Regions -1.7 k and -1.3 k were methylated whereas the region -0.8 k was nonmethylated. After the comparison of DNA methylation profile of well-watered and drought stress plants, no change in -1.7 k and -0.8 k regions was observed. However, the -1.3k region had significant decrease in the DNA methylation at symmetric cytosine sites i.e., cytosine-guanine (CG) dinucleotides and cytosine-adenine/cytosine/thymine-guanine (CHG where H = A, C or T) trinucleotide and significant increase at asymmetric cytosine sites (CHH) under the stress condition. In addition, significant increase in the gene expression of ZmEXPB2 under drought was also observed. In conclusion, drought stress conditions induce DNA hypomethylation at CG, and CHG sites and DNA hypermethylation at CHH sites in the middle region of the promoter of ZmEXPB2 gene. This shift can be associated with the up regulation of ZmEXPB2 gene which in turn increased primary root length as a plant stress response mechanism. © 2021 Friends Science Publishers
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