Search results for: Bashir Ahmad

Items from 1 to 20 out of 413 results

article

Candidaemia and Central Line‐Associated Candidaemia in a Network of Indian ICUs: Impact of COVID‐19 Pandemic

Purva Mathur, Sharad Srivastav, Arpan Kumar Thakur, Rasna Parveen, more

Mycoses > 67 > 9 > n/a - n/a

Background and Objectives Candidaemia is a potentially life‐threatening emergency in the intensive care units (ICUs). Surveillance using common protocols in a large network of hospitals would give meaningful estimates of the burden of candidaemia and central line associated candidaemia in low resource settings. We undertook this study to understand the burden and epidemiology of candidaemia in multiple...

article

Explicit iterative solution of a Caputo‐Hadamard–type fractional turbulent flow model

Lihong Zhang, Nan Qin, Bashir Ahmad

Mathematical Methods in the Applied Sciences > 47 > 13 > 10548 - 10558

In this article, by using the method of upper and lower solutions combined with the monotone iterative technique, we investigate a Caputo‐Hadamard–type fractional turbulent flow model. We prove new comparison results and obtain explicit monotone iterative sequences converging to the extremal solutions and unique solution of the model problem. Examples illustrating the main results are also presented.

article

Sustained Release of Drug Facilitated Through Chemically Crosslinked Polyvinyl Alcohol-Gelatin (PVA-GE) Hydrogels. A sustainable biomedical approach

Shaukat Ali, Nazar Muhammad Ranjha, Bashir Ahmad, Ayaz Ali Khan, more

Polish Journal of Chemical Technology > 2023 > Vol. 25, nr 2 > 56--65

The present study aimed to prepare hydrogel based on polyvinyl alcohol (PVA) and gelatin (Ge) and characterization of PVA/Ge hydrogel for their potential use as a sustained drug delivery system. Polyvinyl Alcohol (PVA) and-Gelatin (Ge) were cross-linked using glutaraldehyde (GA) as a crosslinking agent and hydrochloric acid (HCl) as a catalyst. Different feed polymer ratio and crosslinking agent concentration...

article

Stability and bifurcations of an SIR model with a nonlinear incidence rate

Pegah Taghiei Karaji, Nemat Nyamoradi, Bashir Ahmad

Mathematical Methods in the Applied Sciences > 46 > 9 > 10850 - 10866

In this paper, an SIR model with a nonlinear incidence rate is studied. A disease‐free equilibrium

E_{0}

, an endemic equilibrium

E_{1}

, and the basic reproduction number of the model

R_{0}

are obtained. If

R_{0} < 1, E_{0}

is locally asymptotically stable and if

R_{0} > 1, E_{1}

is locally asymptotically stable. By...

article

High prevalence of coronary artery calcification and increased risk for coronary artery disease in patients with Sheehan syndrome—A case–control study

Bashir Ahmad Laway, Abid Rasool, Mohammad Salem Baba, Raiz Ahmad Misgar, more

Clinical Endocrinology > 98 > 3 > 375 - 382

Objective Patients with Sheehan syndrome (SS) are predisposed to coronary artery disease (CAD) due to risk factors like abdominal obesity, dyslipidemia and chronic inflammation. In addition to estimate CAD risk enhancers like high sensitive C reactive protein (hsCRP), apolipoprotein B (ApoB) and lipoprotein A [Lp(a)], this study applies Framingham risk score (FRS) and coronary artery calcium (CAC)...

article

On implicit fractional q‐difference equations: Analysis and stability

Nadjet Laledj, Abdelkrim Salim, Jamal Eddine Lazreg, Saïd Abbas, more

Mathematical Methods in the Applied Sciences > 45 > 17 > 10775 - 10797

This paper deals with some existence and Ulam stability results for some classes of implicit fractional

q

‐difference equations with and without random effects in Banach spaces and Banach algebras. Our results are provided by applying the fixed point theory (Itoh's random fixed point theorem, the nonlinear alternative of Schaefer's type proved by Dhage, and an other Dhage's random fixed point...

article

Marine bacteria and omic approaches: A novel and potential repository for bioremediation assessment

Shahnawaz Hassan, Sabreena, Zulaykha Khurshid, Sartaj Ahmad Bhat, more

Journal of Applied Microbiology > 133 > 4 > 2299 - 2313

Marine environments accommodating diverse assortments of life constitute a great pool of differentiated natural resources. The cumulative need to remedy unpropitious effects of anthropogenic activities on estuaries and coastal marine ecosystems has propelled the development of effective bioremediation strategies. Marine bacteria producing biosurfactants are promising agents for bio‐remediating oil...

article

A new numerical study of space–time fractional advection–reaction–diffusion equation with Rabotnov fractional‐exponential kernel

Sachin Kumar, Bashir Ahmad

Numerical Methods for Partial Differential Equations > 38 > 3 > 457 - 469

In this article, we study a model problem for the advection–reaction–diffusion equation involving a new nonsingular time‐fractional derivative with Rabotnov fractional‐exponential (RFE) kernel. In order to solve this model numerically, we first obtain the numerical approximation of RFE fractional derivative for a simple polynomial function, which gives rise to an operational matrix of fractional differentiation...

article

Fighting climate change: soil bacteria communities and topography play a role in plant colonization of desert areas

Xiao Sun, Jin Pei, Lei Zhao, Bashir Ahmad, more

Environmental Microbiology > 23 > 11 > 6876 - 6894

Global warming has exacerbated desertification in arid regions. Exploring the environmental variables and microbial communities that drive the dynamics of geographic patterns of desert crops is important for large‐scale standardization of crops that can control desertification. Here, predictions based on future climate data from CMIP6 show that a steady expand in the suitable production areas for...

article

Morphological, histopathological and molecular characterization of Myxobolus szekelyianus n. sp. (Cnidaria: Myxosporea: Myxobolidae) causing acute gill disease in Schizothorax esocinus (Heckel, 1838) from River Jhelum of Kashmir Himalayan region, India

Ishtiyaq Ahmad, Imtiaz Ahmed, Quseen Mushtaq Reshi, Kousar Jan, more

Aquaculture Research > 52 > 12 > 6537 - 6549

During the present study, we describe a novel myxozoan that forms plasmodia in the gill filament of Schizothorax esocinus collected from River Jhelum of Kashmir Himalayan region (n = 26). Description of the new species is based on morphology of the myxospore and on partial 18S rDNA gene. The results showed that the plasmodia were large, visible with naked eye, elongate in shape, whitish in colour,...

article

Stationary distribution and periodic solution of a stochastic Nicholson's blowflies model with distributed delay

Xiaojie Mu, Daqing Jiang, Tasawar Hayat, Ahmed Alsaedi, more

Mathematical Methods in the Applied Sciences > 44 > 17 > 13756 - 13773

Due to the complex set of abiotic and biotic interaction variables in the ecosystems, the dynamics of animal populations are generally considered to be driven in astate‐dependent manner. This paper presents an analysis of a stochastic Nicholson's blowflies model with distributed delay, which consists of the existence and uniqueness of globally positive solution, extinction, existence of positive T...

article

Existence results for a coupled system of nonlinear multi‐term fractional differential equations with anti‐periodic type coupled nonlocal boundary conditions

Bashir Ahmad, Manal Alblewi, Sotiris K. Ntouyas, Ahmed Alsaedi

Mathematical Methods in the Applied Sciences > 44 > 11 > 8739 - 8758

This paper is concerned with the existence and uniqueness of solutions for a coupled system of nonlinear multi‐term fractional differential equations with anti‐periodic type coupled nonlocal boundary conditions. The existence of a unique solution is proved via Banach contraction mapping principle, while two existence results are proved by using Krasnosel'skiic̆'s fixed point theorem and Leray‐Schauder...

article

Spatio‐temporal evaluation of gridded precipitation products for the high‐altitude Indus basin

Zakir Hussain Dahri, Fulco Ludwig, Eddy Moors, Shakil Ahmad, more

International Journal of Climatology > 41 > 8 > 4283 - 4306

The high‐altitude Indus basin is one of the most complex and inadequately explored mountain terrains in the World, where reliable observations of precipitation are highly lacking. Therefore, spatially distributed precipitation products developed at global/regional scale are often used in several scientific disciplines. However, large uncertainties in precipitation estimates of such precipitation data...

article

Appraisal of anti‐Parkinson activity of rhinacanthin‐C in haloperidol‐induced parkinsonism in mice: A mechanistic approach

Uzma Saleem, Zujajah Gull, Ammara Saleem, Muhammad Ajmal Shah, more

Journal of Food Biochemistry > 45 > 4 > n/a - n/a

This study aimed to appraise the anti‐Parkinson's potential of rhinacanthin‐C (RC). RC (5, 10, and 20 mg/kg) was orally administered for 25 days in albino mice to treat haloperidol‐induced parkinsonism (1 mg/kg). RC significantly (p < .05) improved the motor symptoms in block, bar, rotarod, and balance beam walking tests in treated mice. RC reduced the cataleptic effect dose‐dependently. The RC...

article

Molecular mechanisms of anticancer activities of polyphyllin VII

Bashir Ahmad, Shafiq Ur Rehman, Azizullah Azizullah, Muhammad Fiaz Khan, more

Chemical Biology & Drug Design > 97 > 4 > 914 - 929

Cancer is the leading cause of mortality in the world. The major therapies for cancer treatment are chemotherapy, surgery, and radiation therapy. All these therapies expensive, toxic and show resistance. The plant‐derived compounds are considered safe, cost‐effective and target cancer through different pathways. In these pathways include oxidative stress, mitochondrial dependent and independent, STAT3,...

article

Alantolactone induces apoptosis in THP‐1 cells through STAT3, survivin inhibition, and intrinsic apoptosis pathway

Bashir Ahmad, Yaser Gamallat, Pengyu Su, Akbar Husain, more

Chemical Biology & Drug Design > 97 > 2 > 266 - 272

Cancer is the second foremost cause of mortality in the world, and THP‐1 cells play an important role in cancer progression. Alantolactone (ALT), a sesquiterpene lactone compound derived from Inula helenium, has a number of biological activities including antibacterial, antifungal, and anticancer. The current study was conducted to investigate the effects of ALT on THP‐1 cells and its underlying molecular...

article

Existence theory for a system of coupled multi‐term fractional differential equations with integral multi‐strip coupled boundary conditions

Bashir Ahmad, Najla Alghamdi, Ahmed Alsaedi, Sotiris K. Ntouyas

Mathematical Methods in the Applied Sciences > 44 > 3 > 2325 - 2342

In this paper, we study a new boundary value problem of coupled nonlinear multi‐term fractional differential equations supplemented with integral multi‐strip coupled boundary conditions. The modern tools of fractional analysis are applied to derive the existence and uniqueness results for the given problem. We emphasize that our results are new and enrich the literature on the topic.

article

Numerical simulation of the nonlinear generalized time‐fractional Klein–Gordon equation using cubic trigonometric B‐spline functions

Muhammad Yaseen, Muhammad Abbas, Bashir Ahmad

Mathematical Methods in the Applied Sciences > 44 > 1 > 901 - 916

In this paper, an efficient numerical procedure for the generalized nonlinear time‐fractional Klein–Gordon equation is presented. We make use of the typical finite difference schemes to approximate the Caputo time‐fractional derivative, while the spatial derivatives are discretized by means of the cubic trigonometric B‐splines. Stability and convergence analysis for the numerical scheme are discussed...

article

SANTAMARINE: Mechanistic studies on multiple diseases

Sajid Jalal, Bashir Ahmad, Ting Zhang, Lianying Guo, more

Chemical Biology & Drug Design > 95 > 4 > 427 - 434

Medicinal plants are vital sources of modern and traditional Chinese medicines. Sesquiterpene lactones (SLs) consist of a large group of plant secondary metabolites and belong to C15 terpenoid group. SLs have shown various biological activities including antitumor and anti‐inflammatory activities. Santamarine (STM), C₁₅H₂₀O₃, is a kind of sesquiterpene lactone, whose molecular weight is 248.322 g/mol...

article

Steroidal alkaloids efficient aromatase inhibitors with potential for the treatment of postmenopausal breast cancer

Amjad Ali, Naeem Ullah Jan, Safdar Ali, Bashir Ahmad, more

Chemical Biology & Drug Design > 95 > 2 > 233 - 239

Plant‐derived natural products are of great interest due to their diversity in modern drug discovery. Sarcococca saligna has been used for the treatment of different diseases. The present study was aimed at isolating phytochemical constituents including Alkaloid‐C (a), Dictyophlebine (b), Sarcovagine‐D (c) and Saracodine (d) Holaphylline (e) from Sarcococca saligna to investigate the anticancer effect...

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INFONA - science communication portal

Search results for: Bashir Ahmad

Candidaemia and Central Line‐Associated Candidaemia in a Network of Indian ICUs: Impact of COVID‐19 Pandemic

Explicit iterative solution of a Caputo‐Hadamard–type fractional turbulent flow model

Sustained Release of Drug Facilitated Through Chemically Crosslinked Polyvinyl Alcohol-Gelatin (PVA-GE) Hydrogels. A sustainable biomedical approach

Stability and bifurcations of an SIR model with a nonlinear incidence rate

High prevalence of coronary artery calcification and increased risk for coronary artery disease in patients with Sheehan syndrome—A case–control study

On implicit fractional q‐difference equations: Analysis and stability

Marine bacteria and omic approaches: A novel and potential repository for bioremediation assessment

A new numerical study of space–time fractional advection–reaction–diffusion equation with Rabotnov fractional‐exponential kernel

Fighting climate change: soil bacteria communities and topography play a role in plant colonization of desert areas

Morphological, histopathological and molecular characterization of Myxobolus szekelyianus n. sp. (Cnidaria: Myxosporea: Myxobolidae) causing acute gill disease in Schizothorax esocinus (Heckel, 1838) from River Jhelum of Kashmir Himalayan region, India

Stationary distribution and periodic solution of a stochastic Nicholson's blowflies model with distributed delay

Existence results for a coupled system of nonlinear multi‐term fractional differential equations with anti‐periodic type coupled nonlocal boundary conditions

Spatio‐temporal evaluation of gridded precipitation products for the high‐altitude Indus basin

Appraisal of anti‐Parkinson activity of rhinacanthin‐C in haloperidol‐induced parkinsonism in mice: A mechanistic approach

Molecular mechanisms of anticancer activities of polyphyllin VII

Alantolactone induces apoptosis in THP‐1 cells through STAT3, survivin inhibition, and intrinsic apoptosis pathway

Existence theory for a system of coupled multi‐term fractional differential equations with integral multi‐strip coupled boundary conditions

Numerical simulation of the nonlinear generalized time‐fractional Klein–Gordon equation using cubic trigonometric B‐spline functions

SANTAMARINE: Mechanistic studies on multiple diseases

Steroidal alkaloids efficient aromatase inhibitors with potential for the treatment of postmenopausal breast cancer

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