Papers by mohammed yaseen
Structural Chemistry, May 10, 2023
and it eventually selected 80 pregnant women for the final experiment. Those pregnant women who h... more and it eventually selected 80 pregnant women for the final experiment. Those pregnant women who had preeclampsia, intrahepatic cholestasis during pregnancy, placenta previa or chorioamnionitis were more likely to experience pre-term birth. A patient interview was conducted in a detailed manner and all the necessary information regarding the mother and the infant were collected to carry out the study. Among 80 patients, collected the highest number of 39 cases i.e. 49% in between the age group of 17-23 years and the least number of cases therefore 19 i.e. 24% in between the age group of 35-45 years. We studied that maternal variable such as social status and educational status also impacts deliveries. Alcoholics had the highest number of very pre-term deliveries i.e., 36.25%. And among undergraduates, moderate preterm deliveries were a predominant number, i.e. 38.75%. Among the cases collected, 22.5% of women who have previous abortions had the highest number of preterm births with 31 cases and 5% of women with thyroid had the least number of pre-term births. 41% of preemie births were observed in the gestational gap of < 18 months, while 24% were recorded in > 30 months. In between two types of deliveries, 69% of preemie births were observed in the cesarean section and normal delivery includes 31%. The results of our study reveal that there is a need to assess the causes and complications among pregnant women who are at risk of delivering a premature baby. We have concluded that counseling the patients about their risk factors is necessary, and the patients should be told that harmful social habits will have a huge impact on their baby, before or after the delivery.
ChemistrySelect, Jan 5, 2021
A multi‐step synthetic protocol was employed to accomplish the synthesis of (2Z)‐2‐((E)‐4‐(benzyl... more A multi‐step synthetic protocol was employed to accomplish the synthesis of (2Z)‐2‐((E)‐4‐(benzylideneamino)phenyl)‐3‐(1‐methyl‐1H‐imidazol‐2‐yl)acrylonitrile derivatives. The title compounds were screened for antitubercular activity. Amongst them, three of the compounds appeared promising with a MIC value 0.2 to 0.4 μg/mL whereas the other compounds have also exhibited lower MIC than the standards. Docking study was performed to check their binding interaction and to deduce the possible mechanism of action involved in the inhibition process which revealed that the newly synthesized molecules act by inhibiting the DprE1 enzymatic pathway.
Pakistan Journal of Agricultural Sciences, 2020
Phalaris minor is a winter annual self-pollinated grassy weed and prevails in all regions of the ... more Phalaris minor is a winter annual self-pollinated grassy weed and prevails in all regions of the world, particularly in tropics and sub-tropics (Yasin et al., 2011). Its germination in Pakistan starts in November to January and gets maturity in March-April. In Pakistan, P. minor is the most problematic and noxious weed in wheat crop (Yasin et al.,2011) and causes significant yield losses (25-50%) in wheat depending on emergence time, density, competition period of P. minor, control measures and weather conditions (Chhokar et al., 2008). With the passage of time, P. minor developed tolerance against particular herbicides because of continuous application of herbicides (Gherekhloo et al., 2012) possessing same mode of action (Owen et al., 2007). According to Malik and Singh (1995), first case was documented in India during 1991 regarding P. minor tolerance to herbicide but now, it has resistance to several herbicides generally Acetyl CoA Carboxylase (ACCase) and acetolactate synthase (ALS) inhibitors in various countries of the world including South Africa, Australia, Israel, India, Iran and USA (Heap, 2020). Over the past 25 years, the genetic and biochemical bases of resistance in P. minor against herbicides have been studied by several researchers and they documented that resistant biotypes can show or possess one to several co-existing mechanisms that develop resistance in P. minor. Resistant P. minor population has both types of resistance (target and non-target-site resistance). Target-site resistance develops due to mutation in genes coding (Powles and Yu, 2010; Heap, 2020) for herbicides target-site enzyme (prevents the binding with herbicides) or by overproduction of target enzyme (Yu and Powles, 2014). While, non-target-site resistance prevents the translocation of particular herbicides reaching to target site thus increases the metabolism of herbicides (Tranel and Wright, 2002; De´lye, 2013). Herbicides do not give more mortality rate due to under dose, poor application methods, adverse environmental factors, etc. Unfortunately, most of the farmers in Pakistan use herbicides at low doses. Low dose of herbicide encourages the resistance because at low dose of herbicide, some plants survive due to genetic traits, which confer their survival at existing lower doses of herbicides (Yu and Powles, 2014)). Metabolic herbicide resistance is wide spread in the grass weeds like P. minor, Lolium rigidum Guad., Alopecurus myosuroides Huds., and Echinochloa phyllopogon (Stapf) Koso-Pol. etc. (Yu and Powles, 2014, Heap, 2020;). Metabolic resistance in plants increases due to increased activity of endogenous enzymes like cytochrome P450, glutathione S-transferases (GSTs), glucosyl transferases (GTs) etc. (Carey et al., 1997). These enzymes have ability to metabolize herbicides (Kreuz et al., 1996; Edwards and Dixon, 2000; Siminszky, 2006). The P450s, GSTs and GTs enzymes belong to super families of enzymes, which have significant role in primary and secondary metabolism
Paintindia, 1998
Uralkyds, the simplest type of urethanes in which curing occurs by oxidation of the double bonds ... more Uralkyds, the simplest type of urethanes in which curing occurs by oxidation of the double bonds in its fatty acid portion have been prepared and the properties of their paint formulations are determined and compared with those of alkyd and two pack polyurethane. The practical test data of physico-chemical, mechanical and corrosion resistant properties indicate the superiority of uralkyds over alkyds and their proximity to two pack polyurethane coatings. Based on the findings uralkyds could be recommended for protective coating systems where quick air drying, ease of application, better protective properties and low cost are the criteria of the choice of coating system.
Polymer International, Jul 1, 1994
ABSTRACT The flow behaviour of a polyester in various solvents was studied at temperatures rangin... more ABSTRACT The flow behaviour of a polyester in various solvents was studied at temperatures ranging from 10 to 80°C. The practical data obtained from the temperature dependence of limiting viscosity number [η] were used to calculate unperturbed dimensions and interaction parameters of the polyester resin in poor, moderate and good solvents. The data provided information regarding conformational transitions in the polymer chains in terms of exothermic or endothermic local ordering of solvents on resin segments and their fixation on polymer coils. The temperature dependence of unperturbed dimensions Ke, Flory–Huggins interaction parameter χ12, the second virial coefficient A2, entropy parameter U1, enthalpy parameter K1, and viscosity expansion factor αn, has been used to estimate the solvent quality for the resin.
Biochemical Pharmacology, Oct 1, 1991
Applied Water Science, Oct 24, 2019
In the present study, sequential anaerobic-aerobic treatment was used for the enhanced degradatio... more In the present study, sequential anaerobic-aerobic treatment was used for the enhanced degradation of selected nitrophenols. Five identical reactors were used to assess the degradation of 2-nitrophenol and 2,4-dinitrophenol. Reactor 1 was used as control, and another four reactors were operated in anaerobic phase followed by sequential aerobic treatment. The performance of reactors was studied for nitrophenol concentrations of 5, 10, 20 and 40 mg/l and in next phase effect of redox mediators [lawsone and anthraquinone sulphonic acid (AQSA)], along with kinetics of degradation studied for 40 mg/l of nitrophenols. More than 98% degradation of nitrophenols was achieved at lower concentrations but for 40 mg/l removal percentage was reduced, and also COD inhibition was observed. However, with the addition of redox mediators, both nitrophenols and COD removal percentage were greater than 95% and 85%, respectively. Kinetics of degradation revealed that the rate of degradation was found to increase with the increase in concentration of redox mediators from 10 to 20 mg/l, and it was found that degradation was faster with the use of AQSA in comparison with lawsone solution. It indicates that use of redox mediators is favourable for the enhanced degradation of nitrophenols. Sequential anaerobic-aerobic treatment is possible potential treatment method for treating nitrophenolic wastewaters.
ACS omega, Nov 15, 2022
With the advent of the COVID-19 pandemic, there has been a global incentive for applying environm... more With the advent of the COVID-19 pandemic, there has been a global incentive for applying environmentally sustainable and rapid sterilization methods, such as ultraviolet-C radiation (UVC) and ozonation. Material sterilization is a requirement for a variety of industries, including food, water treatment, clothing, healthcare, medical equipment, and pharmaceuticals. It becomes inevitable when devices and items like protective equipment are to be reused on/by different persons. This study presents novel findings on the performance of these sterilization methods using four microorganisms (Escherichia coli, Staphylococcus aureus, Candida albicans, and Aspergillus fumigatus) and six material substrates (stainless steel, polymethyl methacrylate, copper, surgical facemask, denim, and a cotton-polyester fabric). The combination of both ozone and UVC generally yields improved performance compared to their respective applications for the range of materials and microorganisms considered. Furthermore, the effectiveness of both UVC and ozone was higher when the fungi utilized were smeared onto the nonabsorbent materials than when 10 μL droplets were placed on the material surfaces. This dependence on the contaminating liquid surface area was not exhibited by the bacteria. This study highlights the necessity of adequate UVC and ozone dosage control as well as their synergistic and multifunctional attributes when sterilizing different materials contaminated with a wide range of microorganisms.
Marine Drugs, Feb 24, 2022
This article is an open access article distributed under the terms and conditions of the Creative... more This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY
Marine Drugs, Jul 22, 2021
This article is an open access article distributed under the terms and conditions of the Creative... more This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY
Biomedical Materials, Sep 1, 2008
Polyurethanes (PU) and their polymeric derivatives are widely used in the manufacturing of medica... more Polyurethanes (PU) and their polymeric derivatives are widely used in the manufacturing of medical devices. It is important to understand how protein adsorbs onto PU materials as this molecular process directly implicates surface biocompatibility. In this work, we compared protein adsorption at the PU film surfaces with that from the hydrophilic silicon oxide. Two PU polymers were used, a commercial polyurethane (PUA) and a novel poly(carbonate-urea)urethane matrix containing silsesquioxanes (PU4). AFM imaging revealed micro-domain segregation on both PU surfaces, but the incorporation of pendent silsesquioxanes made the PU4 surface much rougher, with the outer surface comprised of soft upper PU segments and lower PU-silsesquioxane hard segments. It appeared that fibrinogen was preferable to adsorb onto the upper soft PU segments. The spectroscopic ellipsometry (SE) measurements at the PU film/solution interface showed that human serum albumin (HSA) adsorption was little affected by surface chemistry whilst fibrinogen adsorption was much greater on the two PU surfaces indicating a strong surface effect. Further studies revealed that HSA adsorption was reversible on hydrophilic SiO(2) against changes in pH from 5 to 7, but irreversible on the two PU surfaces. In contrast, fibrinogen adsorption against the same pH cycling was found to be irreversible on all three surfaces. The different extent of irreversibility was clearly indicative of different interfacial interactions. Sequential protein adsorption revealed that the PU4 surface shared similar physiochemical properties to the SiO(2) surface, demonstrating the success in incorporating the siloxane pendant nanocages. The knowledge of protein surface structure and behaviour may lead to the development of effective means to control surface biocompatibility.
Journal of Material Cycles and Waste Management, Jul 20, 2023
Millions of tonnes of green waste are produced annually in the UK. Composting usually extends to ... more Millions of tonnes of green waste are produced annually in the UK. Composting usually extends to more than two months as well as producing greenhouse gases that can affect the environment if not optimised. We proposed a potential approach to use the algal extract from Ascophyllum nodosum as a compost accelerator. Seaweed-based treatments offer an economical and effective biological solution that activates and stabilises organic matter decomposition, promoting better carbon sequestration. Reducing both the cost and time associated with widely used composting approaches. The seaweed was collected from the Scottish coastline, extracted, and formulated to enhance application. Its effects on the timeline of the composting process were systematically investigated through physical, biological, and observational quantification. The emission of gases, the pH, temperature, humidity, consistency, and microbial growth of the compost were studied. Interestingly, the results showed that the compost reached a stable state within six weeks, with lower ammonia and carbon dioxide production. The use of this formulation can minimise expense, reduce resources used, and also lower the levels of harmful volatile organics. This approach is economically beneficial and environmentally crucial in compost formation, controlling contamination, and carbon sequestration optimisation.
International journal of engineering research and technology, Apr 24, 2018
Grain refinement is one of the technique, which provides finer grains and hence strength and duct... more Grain refinement is one of the technique, which provides finer grains and hence strength and ductility combinations demanded for ambient and cryogenic temperature applications. On the other hand, severe plastic deformation (SPD) is an effective tool for producing bulk ultrafine grain structure. Equal channel angular pressing is one of the SPD technique which provides the potential for refining the grain size of a polycrystalline material to a sub micron scale by producing a large amount of shear strain into the material without changing the billet shape and dimensions. In the present study, Aluminium titanium boride (Al-8%TiB2) composite was deformed through the equal channel pressing (ECAP) by route Bc up to 4 passes. Significant improvement in hardness nearly 74% of hardness has been increased compare to base metal Al6061 alloy and ultimate strength of 517 MPa was obtained nearly 66% increase in UTS in the samples after 4 ECAP pass. The Microstructure analysis revealed that dendritic coarse grain was broken down to fine structured and grains were elongated after ECAP.
Neuroquantology, Feb 28, 2020
Chemical Data Collections, Dec 1, 2020
Nucleation and Atmospheric Aerosols, 2023
International Journal of Health Sciences (IJHS), Sep 14, 2022
This study was undertaken to investigate the effect of aqueous extract of Artemisia herba alba (A... more This study was undertaken to investigate the effect of aqueous extract of Artemisia herba alba (Asteraceae) and procaine penicillin on healing induced defect of the ear cartilage. A total of (25) female rats which used in this study were distributed randomly into five treatment group(five animals per each). Under routine surgery, all rats had circular holes in the elastic cartilage of their ears. All treatment groups were treated with local application daily for one week. Control group(C) treated with normal saline only. First treatment group(T1) treated with 5% Artemisia aqueous extract, second treatment group(T2) treated with 10% Artemisia aqueous extract, third treatment group(T3) treated with 15% Artemisia aqueous extract, fourth treatment group(T4) treated with procaine penicillin. The results showed that there was no significant differences between all treatment group except between (T3) and other treatment groups (1.857± 0.293). It could be concluded that concentration of aqueous extract at 15% (T3)affected significantly on reduce the diameter of ear defect after three weeks of treatment, the result of histo pathological test reveal that complete healing, absence of scar tissue, both edges of cartilage and fused together with marked fibrosis and formed large blood vessels.
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Papers by mohammed yaseen