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1.
Sensors (Basel) ; 22(5)2022 Feb 25.
Artigo em Inglês | MEDLINE | ID: mdl-35270982

RESUMO

Electrical resistance tomography (ERT) has been used in the literature to monitor the gas-liquid separation. However, the image reconstruction algorithms used in the studies take a considerable amount of time to generate the tomograms, which is far above the time scales of the flow inside the inline separator and, as a consequence, the technique is not fast enough to capture all the relevant dynamics of the process, vital for control applications. This article proposes a new strategy based on the physics behind the measurement and simple logics to monitor the separation with a high temporal resolution by minimizing both the amount of data and the calculations required to reconstruct one frame of the flow. To demonstrate its potential, the electronics of an ERT system are used together with a high-speed camera to measure the flow inside an inline swirl separator. For the 16-electrode system used in this study, only 12 measurements are required to reconstruct the whole flow distribution with the proposed algorithm, 10× less than the minimum number of measurements of ERT (120). In terms of computational effort, the technique was shown to be 1000× faster than solving the inverse problem non-iteratively via the Gauss-Newton approach, one of the computationally cheapest techniques available. Therefore, this novel algorithm has the potential to achieve measurement speeds in the order of 104 times the ERT speed in the context of inline swirl separation, pointing to flow measurements at around 10kHz while keeping the average estimation error below 6 mm in the worst-case scenario.


Assuntos
Algoritmos , Tomografia , Impedância Elétrica , Processamento de Imagem Assistida por Computador/métodos , Tomografia/métodos , Tomografia Computadorizada por Raios X
2.
Sensors (Basel) ; 22(12)2022 Jun 12.
Artigo em Inglês | MEDLINE | ID: mdl-35746224

RESUMO

The performance of multiphase flow processes is often determined by the distribution of phases inside the equipment. However, controllers in the field are typically implemented based on flow variables, which are simpler to measure, but indirectly connected to performance (e.g., pressure). Tomography has been used in the study of the distribution of phases of multiphase flows for decades, but only recently, the temporal resolution of the technique was sufficient for real-time reconstructions of the flow. Due to the strong connection between the performance and distribution of phases, it is expected that the introduction of tomography to the real-time control of multiphase flows will lead to substantial improvements in the system performance in relation to the current controllers in the field. This paper uses a gas-liquid inline swirl separator to analyze the possibilities and limitations of tomography-based real-time control of multiphase flow processes. Experiments were performed in the separator using a wire-mesh sensor (WMS) and a high-speed camera to show that multiphase flows have two components in their dynamics: one intrinsic to its nonlinear physics, occurring independent of external process disturbances, and one due to process disturbances (e.g., changes in the flow rates of the installation). Moreover, it is shown that the intrinsic dynamics propagate from upstream to inside the separator and can be used in predictive and feedforward control strategies. In addition to the WMS experiments, a proportional-integral feedback controller based on electrical resistance tomography (ERT) was implemented in the separator, with successful results in relation to the control of the distribution of phases and impact on the performance of the process: the capture of gas was increased from 76% to 93% of the total gas with the tomography-based controller. The results obtained with the inline swirl separator are extended in the perspective of the tomography-based control of quasi-1D multiphase flows.

3.
Sensors (Basel) ; 21(2)2021 Jan 14.
Artigo em Inglês | MEDLINE | ID: mdl-33466874

RESUMO

Crystallization is a significant procedure in the manufacturing of many pharmaceutical and solid food products. In-situ electrical resistance tomography (ERT) is a novel process analytical tool (PAT) to provide a cheap and quick way to test, visualize, and evaluate the progress of crystallization processes. In this work, the spatial accuracy of the nonconductive phantoms in low-conductivity solutions was evaluated. Gauss-Newton, linear back projection, and iterative total variation reconstruction algorithms were used to compare the phantom reconstructions for tap water, industrial-grade saturated sucrose solution, and demineralized water. A cylindrical phantom measuring 10 mm in diameter and a cross-section area of 1.5% of the total beaker area was detected at the center of the beaker. Two phantoms with a 10-mm diameter were visualized separately in noncentral locations. The quantitative evaluations were done for the phantoms with radii ranging from 10 mm to 50 mm in demineralized water. Multiple factors, such as ERT device and sensor development, Finite Element Model (FEM) mesh density and simulations, image reconstruction algorithms, number of iterations, segmentation methods, and morphological image processing methods, were discussed and analyzed to achieve spatial accuracy. The development of ERT imaging modality for the purpose of monitoring crystallization in low-conductivity solutions was performed satisfactorily.

4.
Cell Mol Biol (Noisy-le-grand) ; 66(4): 65-72, 2020 Jun 25.
Artigo em Inglês | MEDLINE | ID: mdl-32583773

RESUMO

The core objective was to evaluate the effect of probiotic fortification at three phases of formula milk administration in malnourished children. A dose related effect was determined in 30 severely acute malnourished children (6-59 months) in a double-blind, randomized design. According to the results, serum albumin levels, treatment T2 (6 billion cfu) has significantly increased albumin levels (3.7g/dL) and the effect of phase-III (Plumpy'nut) was found to be better. Results regarding sodium levels showing probiotic-dose have significant effect (P≤0.05) in phases as well. Moreover, the effect of T1 i.e. 3 billion cfu of probiotics has significantly reduced sodium levels (141.8mmol/L) vs. others and the effect of phase-II was better on reducing sodium levels. which is further confirmed in terms of reduced erythrocyte sedimentation rate levels at phase-III (29.566 vs. phase-II, 41.3 and phase-I, 46.533 mm/h). Conclusively, the effect of 6 billion cfu at phase-III was more effective on blood parameters.


Assuntos
Trato Gastrointestinal/efeitos dos fármacos , Desnutrição/terapia , Probióticos/farmacologia , Probióticos/uso terapêutico , Índice de Gravidade de Doença , Doença Aguda , Alanina Transaminase/sangue , Fosfatase Alcalina/sangue , Aspartato Aminotransferases/sangue , Sedimentação Sanguínea , Criança , Pré-Escolar , Eletrólitos/sangue , Fezes , Humanos , Lactente , Leucócitos/efeitos dos fármacos , Desnutrição/sangue , Potássio/sangue , Albumina Sérica/metabolismo , Sódio/sangue
5.
Cell Mol Biol (Noisy-le-grand) ; 66(4): 104-109, 2020 Jun 25.
Artigo em Inglês | MEDLINE | ID: mdl-32583775

RESUMO

Bush tea (Athrixia phylicoides DC.) is an aromatic South African indigenous plant used for many decades as a health beverage and medicine. Several studies have extensively investigated wild bush tea's secondary metabolites, but the entire profiling of cultivated bush tea's metabolites is limited in the literature. Thus, the objective of this study was to profile cultivated bush tea metabolites using liquid chromatography-quadrupole time of flight-tandem mass spectrometry (LC-QTOF-MS). The 31 metabolites profiled included; benjaminamide, chlorogenate, chrysosplenetin, coumarin, 6Z-docosenamide, naringenin 7-O-ß-d-glucoside, 5-p-coumaroylquinic acid, integrastatin A, luteolin 7-O-(6-O-malonyl-ß-d-glucoside), 1,3-dicaffeoylquinic acid, magnoshinin, okanin, (2S)-5-hydroxy-7-methoxy-6,8-dimethylflavanone, (9Z,12Z,15Z)-octadecatrienoic acid, 2″-deamino-2″-hydroxy-6″-dehydroparomamine, O-butanoylcarnitine, myricitrin, gorlic acid, tetracenomycin X, sakuranin, d-tryptophan, linoleamide, laricitrin 7-monoglucoside, l-ß-phenylalanine, l-proline, pheophytin A, pheophorbide A, PI(18:0/20:4(8Z,11Z,14Z,17Z), stearidonic acid, and gibberellin A14 aldehyde. These annotated metabolites included phenolics, flavonoids, and quinic acids, indicating that bush tea is rich in metabolites, which have a potential wide range of health benefits.


Assuntos
Metabolômica , Chá/crescimento & desenvolvimento , Chá/metabolismo , Cromatografia Líquida , Espectrometria de Massas , Metaboloma , Metabolismo Secundário
6.
Biol Res ; 53(1): 37, 2020 Aug 26.
Artigo em Inglês | MEDLINE | ID: mdl-32847618

RESUMO

BACKGROUND: Soil salinity causes huge economic losses to agriculture productivity in arid and semiarid areas worldwide. The affected plants face disturbances in osmotic adjustment, nutrient transport, ionic toxicity and reduced photosynthesis. Conventional breeding approaches produce little success in combating various stresses in plants. However, non-conventional approaches, such as in vitro tissue culturing, produce genetic variability in the development of salt-tolerant plants, particularly in woody trees. RESULTS: Embryogenic callus cultures of the date palm cultivar Khalas were subjected to various salt levels ranging from 0 to 300 mM in eight subcultures. The regenerants obtained from the salt-treated cultures were regenerated and evaluated using the same concentration of NaCl with which the calli were treated. All the salt-adapted (SA) regenerants showed improved growth characteristics, physiological performance, ion concentrations and K+/Na+ ratios than the salt non-adapted (SNA) regenerants and the control. Regression between the leaf Na+ concentration and net photosynthesis revealed an inverse nonlinear correlation in the SNA regenerants. Leaf K+ contents and stomatal conductance showed a strong linear relationship in SA regenerants compared with the inverse linear correlation, and a very poor coefficient of determination in SNA regenerants. The genetic fidelity of the selected SA regenerants was also tested using 36 random amplified polymorphic DNA (RAPD) primers, of which 26 produced scorable bands. The primers generated 1-10 bands, with an average of 5.4 bands per RAPD primer; there was no variation between SA regenerants and the negative control. CONCLUSION: This is the first report of the variants generated from salt-stressed cultures and their potential adaptation to salinity in date palm cv. Khalas. The massive production of salt stress-adapted date palm plants may be much easier using the salt adaptation approach. Such plants can perform better during exposure to salt stress compared to the non-treated date palm plants.


Assuntos
Aclimatação , Phoeniceae/genética , Tolerância ao Sal/genética , Técnica de Amplificação ao Acaso de DNA Polimórfico , Salinidade
7.
Sensors (Basel) ; 20(21)2020 Oct 25.
Artigo em Inglês | MEDLINE | ID: mdl-33113871

RESUMO

Phase separation based centrifugal forces is effective, and thus widely explored by the process industry. In an inline swirl separator, a core of the light phase is formed in the center of the device and captured further downstream. Given the inlet conditions, this gas core created varies in shape and size. To predict the separation behavior and control the process in an optimal way, the gas core diameter should be measured with the minimum possible intrusiveness. Process tomography techniques such as electrical resistance tomography (ERT) allows us to measure the gas core diameter in a fast and non-intrusive way. Due to the soft-field nature and ill-posed problem in solving the inverse problem, especially in the area of low spatial resolution, the reconstructed images often overestimate the diameter of the object under consideration leading to unreliable measurements. To use ERT measurements as an input for the controller, the estimated diameters should be corrected based on secondary measurements, e.g., optical techniques such as high-speed cameras. In this context, image processing and image analysis techniques were adapted to compare the diameter calculated by an ERT system and a fast camera. In this paper, a correction method is introduced to correct the diameter obtained by ERT based on static measurements. The proposed method reduced the ERT error of dynamic measurements of the gas core size from over 300% to below 20%, making it a reliable sensing technique for controlled separation processes.

8.
Microb Pathog ; 133: 103551, 2019 Aug.
Artigo em Inglês | MEDLINE | ID: mdl-31125685

RESUMO

RNA viruses are the most diverse phytopathogens which cause severe epidemics in important agricultural crops and threaten the global food security. Being obligatory intracellular pathogens, these viruses have developed fine-tuned evading mechanisms and are non-responsive to most of the prophylactic treatments. Additionally, their sprint ability to overcome host defense demands a broad-spectrum and durable mechanism of resistance. In context of CRISPR-Cas discoveries, some variants of Cas effectors have been characterized as programmable RNA-guided RNases in the microbial genomes and could be reprogramed in mammalian and plant cells with guided RNase activity. Recently, the RNA variants of CRISPR-Cas systems have been successfully employed in plants to engineer resistance against RNA viruses. Some variants of CRISPR-Cas9 have been tamed either for directly targeting plant RNA viruses' genome or through targeting the host genes/factors assisting in viral proliferation. The new frontiers in CRISPR-Cas discoveries, and more importantly shifting towards RNA targeting will pyramid the opportunities in plant virus research. The current review highlights the probable implications of CRISPR-Cas system to confer the pathogen-derived or host-mediated resistance against phytopathogenic RNA viruses. Furthermore, a multiplexed CRISPR-Cas13a methodology is proposed here to combat Potato virus Y (PVY); a globally diverse phytopathogen infecting multiple crops.


Assuntos
Sistemas CRISPR-Cas , Resistência à Doença/genética , Doenças das Plantas/genética , Vírus de Plantas/genética , Potyvirus/genética , Vírus de RNA/genética , Repetições Palindrômicas Curtas Agrupadas e Regularmente Espaçadas , Produtos Agrícolas , Edição de Genes/métodos , Marcação de Genes , Genes de Plantas/genética , Genoma Viral , Modelos Teóricos , Doenças das Plantas/prevenção & controle , Doenças das Plantas/virologia , Vírus de Plantas/imunologia , Vírus de Plantas/patogenicidade , Plantas/genética , Plantas Geneticamente Modificadas/imunologia , Plantas Geneticamente Modificadas/virologia , Potyvirus/patogenicidade , Vírus de RNA/imunologia , Ribonucleases/genética
9.
J Pak Med Assoc ; 68(6): 947-949, 2018 Jun.
Artigo em Inglês | MEDLINE | ID: mdl-30323366

RESUMO

Infective endocarditis (IE) is uncommon but a very serious infection during pregnancy. In most cases, the disease tends to run a subacute course and involves the mitral valve. We present the case of a 25-year old pregnant female who developed shortness of breath and fever 2 weeks prior to parturition. The symptoms did not subside after her delivery, which was carried out via c-section. Based on vegetations attached to aortic valve cusps and positive blood culture for staphylococcus Aureus, the diagnosis of infective endocarditis was made.


Assuntos
Insuficiência da Valva Aórtica/diagnóstico por imagem , Estenose da Valva Aórtica/diagnóstico por imagem , Valva Aórtica/anormalidades , Endocardite Bacteriana/diagnóstico , Doenças das Valvas Cardíacas/congênito , Complicações Cardiovasculares na Gravidez/diagnóstico , Complicações Infecciosas na Gravidez/diagnóstico , Infecções Estafilocócicas/diagnóstico , Adulto , Antibacterianos/uso terapêutico , Insuficiência da Valva Aórtica/complicações , Insuficiência da Valva Aórtica/cirurgia , Estenose da Valva Aórtica/complicações , Estenose da Valva Aórtica/cirurgia , Doença da Válvula Aórtica Bicúspide , Endocardite Bacteriana/complicações , Endocardite Bacteriana/terapia , Feminino , Doenças das Valvas Cardíacas/complicações , Implante de Prótese de Valva Cardíaca , Humanos , Gravidez , Complicações Cardiovasculares na Gravidez/terapia , Complicações Infecciosas na Gravidez/terapia , Infecções Estafilocócicas/complicações
10.
Arch Microbiol ; 199(10): 1383-1389, 2017 Dec.
Artigo em Inglês | MEDLINE | ID: mdl-28741076

RESUMO

Verticillium species are soilborne plant pathogens, responsible for big yield losses worldwide. Here, we report improved procedures to generate DNA from Verticillium species imbedded in farm soils. Using new genomic sequence information, primers for V. dahliae, V. albo-atrum, V. tricorpus, and V. longisporum were designed. In a survey of 429 samples from intensively farmed soil of two Swedish regions, only V. dahliae and V. longisporum were identified. A bias towards V. longisporum (40%) was seen in the south, whereas V. dahliae was more frequent in the western region (19%). Analyses of soil and leaf samples from 20 sugar beet fields, where foliar wilting had been observed, revealed V. dahliae DNA in all leaf and soil samples and V. longisporum in 18 soil samples, illustrating host choice and longevity of the V. longisporum microsclerotia. This study demonstrates the applicability of new molecular diagnostic tools that are important for growers of variable crops.


Assuntos
Brassicaceae/microbiologia , DNA Fúngico/genética , Verticillium/genética , Verticillium/isolamento & purificação , Primers do DNA/genética , Doenças das Plantas/microbiologia , Reação em Cadeia da Polimerase em Tempo Real , Solo/química , Microbiologia do Solo , Suécia , Verticillium/classificação
11.
J Ayub Med Coll Abbottabad ; 29(1): 98-101, 2017.
Artigo em Inglês | MEDLINE | ID: mdl-28712185

RESUMO

BACKGROUND: Propofol is a widely-accepted medication for the successful insertion of laryngeal mask airway (LMA). When propofol is used alone, larger doses are required which can lead to cardiorespiratory distress resulting in hypotension and prolonged apnoea. The objective of this study was to evaluate the effect of premedication of midazolam on different doses of propofol for LMA insertion. METHODS: In this randomized clinical trial, eighty-six (86) patients who were scheduled to undergo elective surgery is supine position not requiring the need for tracheal intubation from September 2015 to 6 March 2016 were included. In group I (n=43), the LMA was introduced after induction of anaesthesia with Propofol alone. In Group II (n=43, the patient was premeditated with midazolam (0.05 mg/kg) before induction of anaesthesia with propofol. Each group was divided into three subgroups depending upon the dose of propofol used for LMA insertion. RESULTS: In this study, there were 53.5% females in group I and 48.8% females in group II. The mean age of Children in group I was 7.30±2.55 years and 7.47±2.46 years in group II. Incidence of incomplete Jaw relaxation, coughing and limb movements was significantly high in in Group I patients (pvalues <0.001, <0.001 and <0.001 respectively). Effectiveness of anaesthesia was compared among different subgroups. On comparison of subgroup Ia and IIa, the effectiveness rate was significantly high in subgroup IIa 50% versus only 7.1% in subgroup Ia (p-value 0.012). Similarly, in subgroup IIb effectiveness was achieved in 100% patients as compared to only 64.3% patients in subgroup IIb (p-value 0.014). There was no significant difference in effectiveness rate in subgroup Ic and IIc (p-value 0.309). CONCLUSIONS: With midazolam premedication, the dose of propofol for LMA insertion is decreased. The incidence of adverse events during LMA insertion is also low with midazolam premedication.


Assuntos
Anestésicos Intravenosos , Intubação Intratraqueal , Máscaras Laríngeas , Midazolam , Propofol , Anestésicos Intravenosos/administração & dosagem , Anestésicos Intravenosos/efeitos adversos , Anestésicos Intravenosos/uso terapêutico , Criança , Pré-Escolar , Feminino , Humanos , Intubação Intratraqueal/efeitos adversos , Intubação Intratraqueal/métodos , Intubação Intratraqueal/estatística & dados numéricos , Masculino , Midazolam/administração & dosagem , Midazolam/efeitos adversos , Midazolam/uso terapêutico , Propofol/administração & dosagem , Propofol/efeitos adversos , Propofol/uso terapêutico
12.
Childs Nerv Syst ; 30(7): 1243-8, 2014 Jul.
Artigo em Inglês | MEDLINE | ID: mdl-24566674

RESUMO

INTRODUCTION: Pilocytic astrocytomas in the supratentorial compartment make up 20 % of all brain tumours in children with only 5 % of these arising in the suprasellar region. Optic pathway gliomas or suprasellar gliomas are often seen in neurofibromatosis type 1 (NF1) patients. Given their location, suprasellar pilocytic astrocytomas are challenging to manage surgically with high morbidity rates from surgical resection. We assess our cohort of patients with suprasellar pilocytic astrocytoma and document our experience. METHOD: A retrospective review of patients diagnosed with suprasellar glioma between 2000-October 2012. We included patients diagnosed with optic pathway glioma based on radiological features (with or without biopsy) and those who had a biopsy confirming pilocytic astrocytoma. RESULTS: Fifty-three patients included (sporadic tumours 24 and NF1 related 29). Fifteen sporadic and four NF1 patients were biopsied. Twelve sporadic and 13 NF1 patients were initially treated with chemotherapy while only 1 patient had radiotherapy initially. Progression was noted in 58 % of the sporadic group and 24 % of the NF1 group. The only significant factor for progression was NF1 status (p = 0.026). CONCLUSION: Management should be guided by individual patient circumstance. In our cohort, chemotherapy did not significantly improve progression free survival; however, NF1 status significantly correlated with the decreased progression.


Assuntos
Astrocitoma/patologia , Astrocitoma/terapia , Neoplasias Encefálicas/patologia , Neoplasias Encefálicas/terapia , Adolescente , Antineoplásicos/uso terapêutico , Criança , Pré-Escolar , Terapia Combinada , Progressão da Doença , Humanos , Masculino , Procedimentos Neurocirúrgicos , Radioterapia , Estudos Retrospectivos , Resultado do Tratamento
13.
Br J Neurosurg ; 28(2): 287-9, 2014 Apr.
Artigo em Inglês | MEDLINE | ID: mdl-23957780

RESUMO

We describe a patient who within 2 months of undergoing radio-chemotherapy for glioblastoma developed an Epstein-Barr virus-positive primary diffuse large B-cell CNS lymphoma. To our knowledge, this is the first such case reported in the literature showing that new tumefactions following aggressive treatment for glioblastomata might represent secondary malignancies.


Assuntos
Neoplasias Encefálicas/terapia , Infecções por Vírus Epstein-Barr/complicações , Glioblastoma/terapia , Linfoma de Células B/cirurgia , Procedimentos Neurocirúrgicos/métodos , Idoso , Antineoplásicos Alquilantes/uso terapêutico , Neoplasias Encefálicas/complicações , Neoplasias Encefálicas/cirurgia , Quimiorradioterapia , Protocolos Clínicos , Dacarbazina/análogos & derivados , Dacarbazina/uso terapêutico , Evolução Fatal , Glioblastoma/complicações , Glioblastoma/cirurgia , Cefaleia/etiologia , Humanos , Linfoma de Células B/complicações , Imageamento por Ressonância Magnética , Masculino , Temozolomida , Tomografia Computadorizada por Raios X
14.
Nanomaterials (Basel) ; 13(14)2023 Jul 16.
Artigo em Inglês | MEDLINE | ID: mdl-37513095

RESUMO

In this study, we explore the effects of Zn doping on the electronic, optical, and thermoelectric properties of α-SnSe in bulk and monolayer forms, employing density functional theory calculations. By varying the doping concentrations, we aim to understand the characteristics of Zn-doped SnSe in both systems. Our analysis of the electronic band structure using (PBE), (SCAN), and (HSE06) functionals reveals that all doped systems exhibit semiconductor-like behavior, making them suitable for applications in optoelectronics and photovoltaics. Notably, the conduction bands in SnSe monolayers undergo changes depending on the Zn concentration. Furthermore, the optical analysis indicates a decrease in the dielectric constant when transitioning from bulk to monolayer forms, which is advantageous for capacitor production. Moreover, heavily doped SnSe monolayers hold promise for deep ultraviolet applications. Examining the thermoelectric transport properties, we observe that Zn doping enhances the electrical conductivity in bulk SnSe at temperatures below 500 K. However, the electronic thermal conductivity of monolayer samples is lower compared to bulk samples, and it decreases consistently with increasing Zn concentrations. Additionally, the Zn-doped 2D samples exhibit high Seebeck coefficients across most of the temperature ranges investigated.

15.
Viruses ; 15(12)2023 11 30.
Artigo em Inglês | MEDLINE | ID: mdl-38140599

RESUMO

Pedilanthus leaf curl virus (PeLCV) is a monopartite begomovirus (family Geminiviridae) discovered just a few decades ago. Since then, it has become a widely encountered virus, with reports from ca. 25 plant species across Pakistan and India, indicative of its notable evolutionary success. Viruses mutate at such a swift rate that their ecological and evolutionary behaviors are inextricably linked, and all of these behaviors are imprinted on their genomes as genetic diversity. So, all these imprints can be mapped by computational methods. This study was designed to map the sequence variation dynamics, genetic heterogeneity, regional diversity, phylogeny, and recombination events imprinted on the PeLCV genome. Phylogenetic and network analysis grouped the full-length genome sequences of 52 PeLCV isolates into 7 major clades, displaying some regional delineation but lacking host-specific demarcation. The progenitor of PeLCV was found to have originated in Multan, Pakistan, in 1977, from where it spread concurrently to India and various regions of Pakistan. A high proportion of recombination events, distributed unevenly throughout the genome and involving both inter- and intraspecies recombinants, were inferred. The findings of this study highlight that the PeLCV population is expanding under a high degree of genetic diversity (π = 0.073%), a high rate of mean nucleotide substitution (1.54 × 10-3), demographic selection, and a high rate of recombination. This sets PeLCV apart as a distinctive begomovirus among other begomoviruses. These factors could further exacerbate the PeLCV divergence and adaptation to new hosts. The insights of this study that pinpoint the emergence of PeLCV are outlined.


Assuntos
Begomovirus , Geminiviridae , Filogenia , Doenças das Plantas , Geminiviridae/genética , Variação Genética , DNA Viral/genética , Análise de Sequência de DNA
16.
Polymers (Basel) ; 15(13)2023 Jul 06.
Artigo em Inglês | MEDLINE | ID: mdl-37447606

RESUMO

Plant viruses are a global concern for sustainable crop production. Among the currently available antiviral approaches, nanotechnology has been overwhelmingly playing an effective role in circumventing plant viruses. Alfalfa mosaic virus (AMV) was isolated and identified from symptomatic pepper plants in Egypt using symptomatology, serological tests using the direct ELISA technique, differential hosts and electron microscopy. The virus was biologically purified from a single local lesion that developed on Chenopodium amaranticolor. The AMV infection was further confirmed using an AMV coat protein-specific primer RT-PCR. We further evaluated the antiviral potential of chitosan nanoparticles (CS-NPs) and chitosan silver nanocomposites (CS-Ag NC) in different concentrations against AMV infections in pepper plants. All tested concentrations of CS-NPs and CS-Ag NC induced the inhibition of AMV systemically infected pepper plants when applied 24 h after virus inoculation. The foliar application of 400 ppm CS-NPs or 200 ppm CS-Ag NC produced the highest AMV inhibitory effect (90 and 91%) when applied 24 h after virus inoculation. Treatment with CS-NPs and CS-Ag NC considerably increased the phenol, proline and capsaicin contents compared to the infected plants. Moreover, the agronomic metrics (plant height, fresh and dry pod weights and number of pods per plant) were also significantly improved. According to our results, the potential applications of CS-NPs and CS-Ag NC may provide an effective therapeutic measure for better AMV and other related plant virus management.

17.
Chemosphere ; 327: 138424, 2023 Jun.
Artigo em Inglês | MEDLINE | ID: mdl-36935056

RESUMO

Soil acidity may negatively affect plant growth. By-products (bottom ash (BA), biochar (BC), and biogas slurry (BS)) from bioenergy technology may change the physio-chemical properties of acidic soils and affect the plant growth parameters. The current research work was carried out to determine the impact of different bioenergy by-products to enhance soybean growth and production by alleviating the effects of acidic soil. A total of eight treatments of different bioenergy amendments (BA, BC, and BS) and their combined applications were used as follows; T1 (control), T2 (only biogas slurry); T3 (only bottom ash); T4 (only biochar); T5 (biogas slurry + bottom ash); T6 (biogas slurry + biochar); T7 (bottom ash + biochar); T8 (biochar + bottom ash + biogas slurry). Our results depicted that, the synergistic use of amendment mainly, T8 treatment (BC + BA + BS) was found most effective, which significantly prompted the dry biomass and photosynthetic rate by 42.58% and 13.25% over the T6 treatment respectively. Furthermore, the chlorophyll pigments, photochemical activities, and root growth of soybean plants enhanced significantly under T5 and T8 treatments as compared to the control. Finally, amendments significantly increased the yield in T8 treatment by increasing the pod's number, grain number, 100-grain weight and grain yield by 119.6%, 75%, 24.9%, and 83.7% as compared to T1. Conclusively, amendments are very effective in the reclamation of acidic soil and enhance the post-harvest soil pH at T8 treatment by 41.49% in comparison to T1 treatment. The organic amendments might neutralize the soil pH and change the acidic nature of the soil, which would modify the root growth of soybean and increase the photosynthetic and photochemical activities, resulting in increased soybean growth and yield.


Assuntos
Glycine max , Solo , Solo/química , Cinza de Carvão , Biocombustíveis , Carvão Vegetal/farmacologia , Tecnologia
18.
J Fungi (Basel) ; 9(3)2023 Mar 13.
Artigo em Inglês | MEDLINE | ID: mdl-36983517

RESUMO

Potato (Solanum tuberosum L.) and tomato (S. lycopersicum L.) are the most economically important vegetable crops in Egypt and worldwide. The winter crop in Egypt is particularly prone to late blight caused by Phytophthora infestans. A total of 152 P. infestans isolates were isolated from the 2013, 2014, 2016 and 2018 winter crops with 82 isolates from potato, 69 from tomato and one isolate from eggplant (S. melongena L.). All isolates belonged to the A1 mating type with no evidence of A2 or self-fertile strains. The majority of isolates (53%) were sensitive to metalaxyl, 32% were intermediate and 15% were resistant. Variation in aggressiveness between three P. infestans isolates EG-005 (13_A2) and EG-276 (23_A1) from potato, and EG-237 (23_A1) from eggplant was determined on tuber slices and leaflets of 10 potato cultivars. The eggplant isolate EG-237 showed higher sporulation capacity compared with the other tested isolates and was able to infect potato (Lady Rosetta cv) and tomato (Super Strain B cv). The simple sequence repeat (SSR) genotyping data showed that in contrast to our previous work (3-year period 2010-12) in which the proportion of 13_A2 lineage was 35%, all isolates belonged to the 23_A1 lineage. There was no evidence for the existence of the A2 mating type or 13_A2 lineage even in the destroyed field crops of some cultivars (Cara, Bellini and Valor) that had been reported as resistant to 23_A1. The data have been submitted into the Euroblight database to allow temporal and spatial genetic diversity to be examined in comparison with other regional P. infestans populations. The AVR2 and AVR2-like RXLR effector genes were amplified and sequenced. In the avirulent AVR2 gene, only one heterozygous SNP was detected at position 31 in the N terminus in six isolates out of eleven, whereas two heterozygous SNPs were detected at position 29 in the N-terminus and ninety-two in the C- terminus of the AVR2-like gene. This suggests that changes in the previously reported virulence profile of 23_A1 are not related to commercial cultivars carrying the R2 gene. In addition, this is the first report of P. infestans on eggplant in Egypt.

19.
Plants (Basel) ; 12(6)2023 Mar 22.
Artigo em Inglês | MEDLINE | ID: mdl-36987104

RESUMO

The gluten strength and the composition of high- and low-molecular-weight glutenin subunits (HMWGSs and LMWGSs) of fifty-one durum wheat genotypes were evaluated using sodium dodecyl sulfate (SDS) sedimentation testing and SDS polyacrylamide gel electrophoresis (SDS-PAGE). This study examined the allelic variability and the composition of HMWGSs and LMWGSs in T. durum wheat genotypes. SDS-PAGE was proven to be a successful method for identifying HMWGS and LMWGS alleles and their importance in determining the dough quality. The evaluated durum wheat genotypes with HMWGS alleles 7+8, 7+9, 13+16, and 17+18 were highly correlated with improved dough strength. The genotypes containing the LMW-2 allele displayed stronger gluten than those with the LMW-1 allele. The comparative in silico analysis indicated that Glu-A1, Glu-B1, and Glu-B3 possessed a typical primary structure. The study also revealed that the lower content of glutamine, proline, glycine, and tyrosineand the higher content of serine and valine in the Glu-A1 and Glu-B1 glutenin subunits, and the higher cysteine residues in Glu-B1 and lower arginine, isoleucine, and leucine in the Glu-B3 glutenin, are associated with the suitability of durum wheat for pasta making and the suitability of bread wheat with good bread-making quality. The phylogeny analysis reported that both Glu-B1 and Glu-B3 had a closer evolutionary relationship in bread and durum wheat, while the Glu-A1 was highly distinct. The results of the current research may help breeders to manage the quality of durum wheat genotypes by exploiting the allelic variation in glutenin. Computational analysis showed the presence of higher proportions of glutamine, glycine, proline, serine, and tyrosine than the other residues in both HMWGSs and LMWGSs. Thus, durum wheat genotype selection according to the presence of a few protein components effectively distinguishes the strongest from the weakest types of gluten.

20.
Plants (Basel) ; 12(17)2023 Aug 25.
Artigo em Inglês | MEDLINE | ID: mdl-37687305

RESUMO

Water scarcity due to overuse and growing water pollution has led to the need for upgrading of conventional methods of wastewater treatment. The biological synthesis of zinc oxide nanoparticles (ZnO-NPs) and their photocatalytic capacity to degrade contaminants offer a promising and environment-friendly approach to municipal wastewater treatment. This technique is advantageous due to its cost-effectiveness, sustainability, and reduction in toxic residual substances. In this study, microbial-synthesized ZnO-NPs were used for the treatment of municipal wastewater. The objective of this study was to evaluate the potential of treated wastewater for wheat crop cultivation. Zinc oxide nanoparticles were synthesized from a pre-isolated bacterial strain, namely Shewanela sp., and characterized using UV-VIS, X-ray diffraction (XRD), scanning electron microscopy (SEM), and Fourier transform infrared spectroscopy (FTIR) analyses. The results showed that after the treatment of wastewater, the concentration of total dissolve solids (TDS), the chemical oxygen demand (COD), and sulfate and phosphate levels decreased by 76.5%, 57.1%, 81.1%, and 67.4%, respectively. However, the application of treated wastewater increased chlorophyll, carotenoids, and antioxidants by 45%, 40.8%, and 10.5 to 30.6%, respectively. Further, the application of treated wastewater also significantly decreased oxidative stress induced by hydrogen peroxide (H2O2) and malondialdehyde (MDA) by 8.1% and 30.1%, respectively. In conclusion, biosynthesized ZnO-NPs could be an important choice to treat municipal wastewater and to improve wheat productivity.

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