Showing papers by "Ali H. Bahkali published in 2023"
TL;DR: In this article , a bottom-up approach was adopted to prepare free-standing orthorhombic Nb2O5-anchored carbon nanofibers (Nb 2O5 @CNFs) hybrid paper via in-situ solvothermal synthesis of Nb-metal organic [email protected] hybrid and subsequent pyrolysis process.
3 citations
TL;DR: In this article , a nano-heterojunction was fabricated through ultrasonication-assisted co-precipitation method by the hierarchical deposition of α-Fe2O3 and β-La2S3 on cubic CoCr2O4 spinel.
2 citations
TL;DR: In this paper , the potentiality of HMs-tolerant soil microbes in metal detoxification, Pseudomonas fluorescence PGPR-7 and Trichoderma sp. T-4 were recovered from HM-affected areas.
Abstract: Abstract Industrialization and human urbanization have led to an increase in heavy metal (HM) pollution which often cause negative/toxic effect on agricultural crops. The soil-HMs cannot be degraded biologically however, microbe-mediated detoxification of toxic HMs into lesser toxic forms are reported. Considering the potentiality of HMs-tolerant soil microbes in metal detoxification, Pseudomonas fluorescence PGPR-7 and Trichoderma sp. T-4 were recovered from HM-affected areas. Under both normal and cadmium stress, the ability of both microorganisms to produce different plant hormones and biologically active enzymes was examined. Strains PGPR-7 and T-4 tolerated cadmium (Cd) an up-to 1800 and 2000 µg mL −1 , respectively, and produced various plant growth regulating substances (IAA, siderophore, ACC deaminase ammonia and HCN) in Cd-stressed condition. The growth promoting and metal detoxifying ability of both strains were evaluated (either singly/combined) by applying them in chickpea ( Cicer arietinum L.) plants endogenously contaminated with different Cd levels (0–400 µg kg −1 soils). The higher Cd concentration (400 µg kg −1 soils) negatively influenced the plant parameters which, however, improved following single/combined inoculation of P . fluorescence PGPR-7 and Trichoderma sp. T-4. Both microbial strains increased the growth of Cd-treated chickpeas however, their combined inoculation (PGPR-7 + T-4) caused the most positive effect. For instance, 25 µg Cd Kg −1 + PGPR-7 + T4 treatment caused maximum increase in germination percentage (10%), root dry biomass (71.4%) and vigour index (33%), chl-a (38%), chl-b (41%) and carotenoid content (52%). Furthermore, combined inoculation of P. fluorescence PGPR-7 and Trichoderma sp. T-4 maximally decreased the proline, MDA content, POD and CAT activities by 50%, 43% and 62%, respectively following their application in 25 µg Cd kg −1 soils-treated chickpea. Additionally, microbial strains lowered the plant uptake of Cd. For example, Cd-uptake in root tissues was decreased by 42 and 34% when 25 µg Cd Kg −1 - treated chickpea plants were inoculated with P . fluorescence PGPR-7, Trichoderma sp. T-4 and co-inoculation (PGPR-7 + T4) of both strains, respectively. Therefore, from the current observation, it is suggested that dual inoculation of metal tolerant P . fluorescence and Trichoderma sp. may potentially be used in detoxification and reclamation of metal-contaminated soils.
2 citations
TL;DR: In this article , the authors report the rational design of tailored 3D hollow cube architecture for asymmetric supercapacitor (ASC) device applications, which achieved high rate capability and exceptional cyclic stability of 78 % after 10,000 cycles with 94 % coulombic efficiency.
Abstract: Tri-metallic sulfides (TMS) with hollow/porous architectures have attracted considerable attention for the fabrication of efficient hybrid supercapacitors. Thus, for the first time, we report the rational design of tailored 3D hollow cube architecture for asymmetric supercapacitor (ASC) device applications. The MnCoNiS/Ni foam (NF) electrodes grown at a hydrothermal deposition time of 15 h with 3D hollow cube morphology (labelled as MCNS-4) delivers excellent specific capacitance (Cs) of 2831.85 F g−1 and areal capacitance (CA) of 14.2 F cm−2 at 10 mA cm−2. The MCNS/NF//AC/NF-based ASC device exhibited a high Cs of 177.65 F g−1, CA of 534 mF cm−2, a power density of 1416.71 W kg−1 (4.25 mW cm−2), and an energy density of 71.30 Wh kg−1 (0.214 mWh cm−2) at 1.7 V potential. The ASC device delivers high rate capability and exceptional cyclic stability of 78 % after 10,000 cycles with 94 % coulombic efficiency. Thus, the outstanding charge storage performance and redox activity of ASC can be credited to the synergistic effects of the Ostwald ripening process, heat treatment, fine-tuning of morphology, and low charge transfer resistance. Finally, the commercial blue LED was illuminated for >4 min by connecting two ASC devices in series. Hence, encouraging device performance demonstrates that MnCoNiS electrodes are a highly competent contender for the progress of next-generation, and practical energy storage devices to reduce power hunger.
2 citations
TL;DR: In this paper , the effect of varying proportions of magnesite (MS) addition on nitrogen transformation and bacterial community dynamics during pig manure composting was investigated, and it was shown that 10% MS appears to be optimal for pig manure composting, as it can augment microbial abundance and mitigate nitrogen loss.
1 citations
1 citations
TL;DR: Lupenone is the most potent compound against nucleocapsid of tomato spotted wilt virus (TSWV) as discussed by the authors , which is one of the most harmful diseases affecting the growing and making of tomatoes.
1 citations
TL;DR: In this paper , the potential of nanoparticles for the photodegradation of antibiotics and subsequent stress alleviation via Titania oxide (TiO2) application for improvement in crop productivity and quality in terms of the nutritional composition.
1 citations
TL;DR: In this article , the effects of biochar on fungal dynamics during food waste composting were examined for 42 days and different dosage of wheat straw biochar from 0 to 15% (0, 2.5%, 5, 5, 7.5, 10, and 15%) were used as an additive to composting and examined for a 42 days.
TL;DR: In this article , the influence of combined use of organic and inorganic nitrogen sources along with the beneficial micro-organisms on grain N uptake, N use efficiency and N utilization efficiency in maize was evaluated.
TL;DR: In this article , a ternary NiCo2O4-Bi2O3-Ag2ZrO3 nanocomposite has been presented through a facile co-precipitation methods.
Abstract: Nowadays, drugs have been developed widely for the remediation of different microbial diseases. However, the presence of these compounds have influence on the water bodies. Thereupon, the preparation of inexpensive and efficient catalysts for the antibiotics degradation is important for the treatment of toxic contaminant in water. The ternary NiCo2O4-Bi2O3-Ag2ZrO3 nanocomposite has been presented through a facile co-precipitation methods. The as-prepared nanocomposites was studied for the decomposition of metronidazole (MTN) under the visible light, and characterized by different analysis such as TEM, UV-vis, XPS, SEM, FT-IR, EIS, ESR, BET, and PL techniques. The determined band gap values of Ag2ZrO3, Bi2O3, NiCo2O4 and NiCo2O4-Bi2O3-Ag2ZrO3 nanocomposites were 2.67, 2.45, 2.18 and 1.92 eV, respectively. The degradation efficiency of NiCo2O4-Bi2O3-Ag2ZrO3 under visible light displays the 100.0% decomposition attained in 80 min. The important parameters such as neutral pH, 4.0 g/L of catalyst dosage, and 5 mg/L of MTN concentration were found to be favorable for this reaction. The great recyclability attributes of the prepared catalyst were discerned after five successive cycles. The toxicity of the degraded MTN products were harmless and non-toxic. The scavenging test revealed that ·OH and ·O2− were the important radicals in the degradation of MTN by NiCo2O4-Bi2O3-Ag2ZrO3. The fabricated NiCo2O4-Bi2O3-Ag2ZrO3 was also investigated for the antimicrobial activity.
TL;DR: In this article , the effect of various lengths of branch on gaseous emissions and vital enzymatic activity was investigated, which showed that the amendment of 2 cm of branch showed conducive to decline greenhouse gas emissions, which the CH4 emissions decreased by 1.62-40.10%, and the N2O emissions decreased 21.91-34.04% compared with other treatments.
TL;DR: In this paper , the authors used morphological identification and internal transcribed spacer (ITS) regions in rRNA analyses to determine phylogeny and diversity of endophytic fungi.
TL;DR: In this article , the role of Taxol derived from Eucalyptus brevifolia in enhancing the resilience of E. grandis against drought stress and improving its therapeutic oil properties was investigated.
Abstract: Background: Drought poses a significant threat to the growth and survival of woody plants, especially Eucalyptus grandis, which is known for its slow and steady growth. Understanding the physiological and molecular responses of E. grandis to abiotic stress is essential for developing strategies to improve its drought resistance. This study focuses on the potential vulnerability of E. grandis during the initial months of root system proliferation and investigates the role of the essential oil-derived compound Taxol in enhancing its drought resistance. Methodology: A comprehensive analysis was performed on various aspects of E. grandis, including morphological features, photosynthetic rates, pigment concentrations, nitrogenous components, and lipid peroxidation. Furthermore, the study examined the accumulation of soluble carbohydrates, proline, and antioxidant enzymes as part of the tree’s response to drought stress. Molecular docking and molecular dynamics simulations were conducted to determine the binding affinity of Taxol, an essential oil derived from Taxus brevifolia, with the VIT1 protein in E. grandis. Results: E. grandis displayed remarkable resilience to drought by accumulating vast reserves of soluble carbohydrates, proline, and antioxidant enzymes. The essential oil-derived compound Taxol exhibited a strong binding affinity with the VIT1 protein (−10.23 kcal/mol), suggesting its potential role in enhancing the tree’s drought resistance. Conclusion: This study reveals the pivotal role of Taxol in augmenting the resilience of E. grandis against drought stress and improving its therapeutic oil properties. Emphasizing the tree’s inherent tolerance during its susceptible early stages is crucial in promoting sustainable agriculture and forestry practices. The findings underscore the importance of advanced scientific research in uncovering the concealed capabilities of robust trees like E. grandis as we continue our pursuit of a sustainable future.
TL;DR: In this article , the authors explore microbes from mangroves in Saudi Arabia for their abilities to produce high level of lipids using GC/MS and their fatty acid profile were determined.
TL;DR: In this paper , six isolated actinobacteria strains were identified as members of the Streptomyces, Amycolatopsis and Nocardia genus, and their consortium was used to inoculate Medicago sativa as test crop.
TL;DR: In this paper , the authors used a completely randomized design (CRD) with four treatments and each treatment had three replications, namely: 24, 27, 30, and 33 ppt.
Abstract: - The main problem in today's mangrove crab hatchery is the low survival rate of larvae at the zoea and megalopa stages in entering the crablet stage caused by a less than optimum rearing environment. This study was aimed to determine the optimum salinity that produces the best survival rate and growth rate of mud crabs (S. olivacea) at the megalopa-crablet stage. Research The research was carried out at the Center for Brackish Water Aquaculture Development (CBAD), Bonddia Village, Galesong District, Takalar Regency, South Sulawesi, Indonesia. The test animals used were mangrove crabs at the megalopa stage which were stocked at a density of 5 individuals/L and reared until they entered megalopa. The research used a container in the form of a black plastic basin with a volume of 30 L filled with 12 pieces of 20 L of water. The study was designed using a completely randomized design (CRD) with 4 treatments and each treatment had 3 replications, namely: 24, 27, 30, and 33 ppt. The placement of the experimental containers was done randomly.
TL;DR: A survey of the state of the art in marine mycology can be found in this paper , where the authors highlight the current state of marine fungal research in individual countries highlighting their strength in the subject.
Abstract: Abstract Early research on marine fungi was mostly descriptive, with an emphasis on their diversity and taxonomy, especially of those collected at rocky shores on seaweeds and driftwood. Subsequently, further substrata (e.g. salt marsh grasses, marine animals, seagrasses, sea foam, seawater, sediment) and habitats (coral reefs, deep-sea, hydrothermal vents, mangroves, sandy beaches, salt marshes) were explored for marine fungi. In parallel, research areas have broadened from micro-morphology to ultrastructure, ecophysiology, molecular phylogenetics, biogeography, biodeterioration, biodegradation, bioprospecting, genomics, proteomics, transcriptomics and metabolomics. Although marine fungi only constitute a small fraction of the global mycota, new species of marine fungi continue to be described from new hosts/substrata of unexplored locations/habitats, and novel bioactive metabolites have been discovered in the last two decades, warranting a greater collaborative research effort. Marine fungi of Africa, the Americas and Australasia are under-explored, while marine Chytridiomycota and allied taxa, fungi associated with marine animals, the functional roles of fungi in the sea, and the impacts of climate change on marine fungi are some of the topics needing more attention. In this article, currently active marine mycologists from different countries have written on the history and current state of marine fungal research in individual countries highlighting their strength in the subject, and this represents a first step towards a collaborative inter- and transdisciplinary research strategy.
TL;DR: In this paper , the possibility of using organic cow dung particles as an eco-friendly reinforcement in friction material for brake pads is investigated, which could open up an era of low cost, organic and ecofriendly alternative to carcinogenic asbestos/copper in friction materials.
Abstract: The purpose of the study is to develop a biodegradable and non-asbestos/copper-free brake pad formulation. The possibility of using organic cow dung particles as an eco-friendly reinforcement in friction material for brake pads is investigated. Sodium hydroxide (NaOH) treated cow dung is Sun dried and ground to an average particle size of 200 microns. It is reinforced in epoxy resin in weight fractions of 5%, 10%, 15%, 20% and 25% along with other fillers and friction stabilizers. The composite samples are subjected to density, thermal conductivity, microhardness and tensile strength evaluation for mechanical characterization. Pin on disc testing is done to identify the coefficient of friction (CoF), wear coefficient and specific wear rate as a part of tribological characterization. The scanning electron micrographs and EDAX analysis of worn out surface is performed to study the wear mechanism. Promising results are seen with composite samples reinforced with 15% cow dung particles in terms of better microhardness, tensile strength, stable coefficient of friction and low wear. The investigation could guide industries working on brake pad materials. This could open up an era of low cost, organic and eco-friendly alternative to carcinogenic asbestos/copper in friction materials.
TL;DR: Paraloratospora marina and Tremateia phragmitis sp. nov. as mentioned in this paper were collected on decaying woody stems of Phragmites australis at Cardiff Bay Nature Reserve in Wales, United Kingdom.
Abstract: Abstract This study introduces two new marine microfungal species, Paraloratospora marina (Phaeosphaeriaceae) and Tremateia phragmitis (Didymosphaeriaceae) based on morphological comparisons and multi-gene phylogenetic analyses. They were collected on decaying woody stems of Phragmites australis at Cardiff Bay Nature Reserve in Wales, United Kingdom. Paraloratospora marina sp. nov. is characterized by immersed, globose to subglobose ascomata with a papillate and periphysate ostiole, cylindrical to subcylindrical, thick-walled, sessile to subsessile asci, fusiform, hyaline to pale brown, 3-septate, guttulate ascospores. Tremateia phragmitis sp. nov. is characterized by semi-immersed to immersed, globose ascomata with a protruding periphysate ostiole, clavate, pedicellate, asci and ascospores that are ellipsoidal to broadly fusiform, 4–6 transversely septate, with 1–2 vertical septa, muriform, golden brown to pale brown ascospores. Dichotomopilus funicola and Pseudofusicoccum ardesiacum are recorded for the first time from marine habitats. Furthermore, based on morphological characteristics and multigene phylogenetic analyses, Phaeosphaeria spartinae was transferred to Septoriella.