kashif ali - Academia.edu (original) (raw)

Papers by kashif ali

Research paper thumbnail of Energy-Efficient Parallel Singulation In RFID

… (ICC), 2010 IEEE …, 2010

Abstract—Tag collisions impose a significant hindrance to reading rates of Radio Frequency Identi... more Abstract—Tag collisions impose a significant hindrance to reading rates of Radio Frequency Identification systems. The parallel singulation approach, being a major milestone, clusters tags and autonomously interrogates each cluster in parallel. This technique reduces the ...

Research paper thumbnail of Pattern of snakebite cases evaluated at a tertiary care hospital

Indian Journal of Forensic and Community Medicine

Research paper thumbnail of 2011 Food Chem grapes

Research paper thumbnail of On (a,d)-vertex-antimagic total labeling of Harary graphs

Utilitas Mathematica

Let G=(V,E) be a graph with v vertices and e edges. An (a,d)-vertex-antimagic total labeling is a... more Let G=(V,E) be a graph with v vertices and e edges. An (a,d)-vertex-antimagic total labeling is a bijection λ from V(G)∪E(G) to the set of consecutive integers 1,2,⋯,v+e, such that the weights of the vertices form an arithmetic progression with the initial term a and common difference d. If λ(V(G))={1,2,⋯,v} then we call the labeling a super (a,d)-vertex- antimagic total. We construct (a,d)-vertex-antimagic total labelings on Harary graphs as well as or the disjoint union of k identical copies of Harary graphs.

Research paper thumbnail of Super edge-magic total labeling of a tree

An edge-magic total labeling of a graph G is a one-toone map λ from V (G) ∪ E(G) onto the integer... more An edge-magic total labeling of a graph G is a one-toone map λ from V (G) ∪ E(G) onto the integers {1, 2, • • • , |V (G) ∪ E(G)|} with the property that, there is an integer constant c such that λ(x) + λ(xy) + λ(y) = c for any xy ∈ E(G). If λ(V (G)) = {1, 2, • • • , |V (G|} then edge-magic total labeling is called super edgemagic total labeling. In this paper we investigate super edge-magic total labeling on w-trees.

Research paper thumbnail of Enabling Ultra Large-Scale Radio Identification Systems

Abstract: Radio Frequency IDentification (RFID) is growing prominence as an automated identificat... more Abstract: Radio Frequency IDentification (RFID) is growing prominence as an automated identification technology able to turn everyday objects into an ad-hoc network of mobile nodes; which can track, trigger events and perform actions. Energy scavenging and ...

Research paper thumbnail of Perturbation of polyamine catabolism affects grape ripening of Vitis vinifera cv. Trincadeira

Plant Physiology and Biochemistry, 2014

Grapes are economically the most important fruit worldwide. However, the complexity of biological... more Grapes are economically the most important fruit worldwide. However, the complexity of biological events that lead to ripening of nonclimacteric fruits is not fully understood, particularly the role of polyamines' catabolism. The transcriptional and metabolic profilings complemented with biochemical data were studied during ripening of Trincadeira grapes submitted to guazatine treatment, a potent inhibitor of polyamine oxidase activity. The mRNA expression profiles of one time point (EL 38) corresponding to harvest stage was compared between mock and guazatine treatments using Affymetrix GrapeGen(®) genome array. A total of 2113 probesets (1880 unigenes) were differentially expressed between these samples. Quantitative RT-PCR validated microarrays results being carried out for EL 35 (véraison berries), EL 36 (ripe berries) and EL 38 (harvest stage berries). Metabolic profiling using HPLC and (1)H NMR spectroscopy showed increase of putrescine, proline, threonine and 1-O-ethyl-β-glucoside in guazatine treated samples. Genes involved in amino acid, carbohydrate and water transport were down-regulated in guazatine treated samples suggesting that the strong dehydrated phenotype obtained in guazatine treated samples may be due to impaired transport mechanisms. Genes involved in terpenes' metabolism were differentially expressed between guazatine and mock treated samples. Altogether, results support an important role of polyamine catabolism in grape ripening namely in cell expansion and aroma development.

Research paper thumbnail of Identification of bioactive metabolites against adenosine A1 receptor using NMR-based metabolomics

Metabolomics, 2013

ABSTRACT Marine sponges are relatively less explored for their chemical features but highly antic... more ABSTRACT Marine sponges are relatively less explored for their chemical features but highly anticipated resource for bioactive compounds. In this paper we report the screening of marine sponges crude extracts for their potential to bind the adenosine A1 receptor. Many samples showed very promising activity and in order to identify the active components, a metabolomics-chemometrics approach is employed. Nuclear magnetic resonance spectroscopy is used for the metabolic profiling of the marine sponges and partial least squares (PLS) and orthogonal PLS (OPLS) algorithms are used to correlate the metabolomics with bioactivity data. Using several two dimensional-NMR techniques, the resonances responsible for the separation of high activity samples from the medium and low activity samples were identified as associated to metabolites like halisulfate 1, halisulfate 3–5, and suvanine (1–5), all belongs to sesterterpenes class. The reference compounds for these metabolites are also tested for the activity, which endorse the findings of the applied methodology.

Research paper thumbnail of On antimagic total labeling of some families of graphs

This paper deals with two types of graph labelings namely, super (a, d)-edge antimagic total labe... more This paper deals with two types of graph labelings namely, super (a, d)-edge antimagic total labeling and (a, d)-vertex antimagic total labeling. We provide super (a, d)-edge antimagic total labeling for disjoint union Harary graphs and disjoint union of cycles. We also provide (a, d)-vertex antimagic total labeling for disjoint union of Harary graphs, disjoint union of non isomorphic cycles, sun graphs and disjoint union of non isomorphic sun graphs.

Research paper thumbnail of Energy-Efficient Parallel Singulation In RFID

… (ICC), 2010 IEEE …, 2010

Abstract—Tag collisions impose a significant hindrance to reading rates of Radio Frequency Identi... more Abstract—Tag collisions impose a significant hindrance to reading rates of Radio Frequency Identification systems. The parallel singulation approach, being a major milestone, clusters tags and autonomously interrogates each cluster in parallel. This technique reduces the ...

Research paper thumbnail of Pattern of snakebite cases evaluated at a tertiary care hospital

Indian Journal of Forensic and Community Medicine

Research paper thumbnail of 2011 Food Chem grapes

Research paper thumbnail of On (a,d)-vertex-antimagic total labeling of Harary graphs

Utilitas Mathematica

Let G=(V,E) be a graph with v vertices and e edges. An (a,d)-vertex-antimagic total labeling is a... more Let G=(V,E) be a graph with v vertices and e edges. An (a,d)-vertex-antimagic total labeling is a bijection λ from V(G)∪E(G) to the set of consecutive integers 1,2,⋯,v+e, such that the weights of the vertices form an arithmetic progression with the initial term a and common difference d. If λ(V(G))={1,2,⋯,v} then we call the labeling a super (a,d)-vertex- antimagic total. We construct (a,d)-vertex-antimagic total labelings on Harary graphs as well as or the disjoint union of k identical copies of Harary graphs.

Research paper thumbnail of Super edge-magic total labeling of a tree

An edge-magic total labeling of a graph G is a one-toone map λ from V (G) ∪ E(G) onto the integer... more An edge-magic total labeling of a graph G is a one-toone map λ from V (G) ∪ E(G) onto the integers {1, 2, • • • , |V (G) ∪ E(G)|} with the property that, there is an integer constant c such that λ(x) + λ(xy) + λ(y) = c for any xy ∈ E(G). If λ(V (G)) = {1, 2, • • • , |V (G|} then edge-magic total labeling is called super edgemagic total labeling. In this paper we investigate super edge-magic total labeling on w-trees.

Research paper thumbnail of Enabling Ultra Large-Scale Radio Identification Systems

Abstract: Radio Frequency IDentification (RFID) is growing prominence as an automated identificat... more Abstract: Radio Frequency IDentification (RFID) is growing prominence as an automated identification technology able to turn everyday objects into an ad-hoc network of mobile nodes; which can track, trigger events and perform actions. Energy scavenging and ...

Research paper thumbnail of Perturbation of polyamine catabolism affects grape ripening of Vitis vinifera cv. Trincadeira

Plant Physiology and Biochemistry, 2014

Grapes are economically the most important fruit worldwide. However, the complexity of biological... more Grapes are economically the most important fruit worldwide. However, the complexity of biological events that lead to ripening of nonclimacteric fruits is not fully understood, particularly the role of polyamines' catabolism. The transcriptional and metabolic profilings complemented with biochemical data were studied during ripening of Trincadeira grapes submitted to guazatine treatment, a potent inhibitor of polyamine oxidase activity. The mRNA expression profiles of one time point (EL 38) corresponding to harvest stage was compared between mock and guazatine treatments using Affymetrix GrapeGen(®) genome array. A total of 2113 probesets (1880 unigenes) were differentially expressed between these samples. Quantitative RT-PCR validated microarrays results being carried out for EL 35 (véraison berries), EL 36 (ripe berries) and EL 38 (harvest stage berries). Metabolic profiling using HPLC and (1)H NMR spectroscopy showed increase of putrescine, proline, threonine and 1-O-ethyl-β-glucoside in guazatine treated samples. Genes involved in amino acid, carbohydrate and water transport were down-regulated in guazatine treated samples suggesting that the strong dehydrated phenotype obtained in guazatine treated samples may be due to impaired transport mechanisms. Genes involved in terpenes' metabolism were differentially expressed between guazatine and mock treated samples. Altogether, results support an important role of polyamine catabolism in grape ripening namely in cell expansion and aroma development.

Research paper thumbnail of Identification of bioactive metabolites against adenosine A1 receptor using NMR-based metabolomics

Metabolomics, 2013

ABSTRACT Marine sponges are relatively less explored for their chemical features but highly antic... more ABSTRACT Marine sponges are relatively less explored for their chemical features but highly anticipated resource for bioactive compounds. In this paper we report the screening of marine sponges crude extracts for their potential to bind the adenosine A1 receptor. Many samples showed very promising activity and in order to identify the active components, a metabolomics-chemometrics approach is employed. Nuclear magnetic resonance spectroscopy is used for the metabolic profiling of the marine sponges and partial least squares (PLS) and orthogonal PLS (OPLS) algorithms are used to correlate the metabolomics with bioactivity data. Using several two dimensional-NMR techniques, the resonances responsible for the separation of high activity samples from the medium and low activity samples were identified as associated to metabolites like halisulfate 1, halisulfate 3–5, and suvanine (1–5), all belongs to sesterterpenes class. The reference compounds for these metabolites are also tested for the activity, which endorse the findings of the applied methodology.

Research paper thumbnail of On antimagic total labeling of some families of graphs

This paper deals with two types of graph labelings namely, super (a, d)-edge antimagic total labe... more This paper deals with two types of graph labelings namely, super (a, d)-edge antimagic total labeling and (a, d)-vertex antimagic total labeling. We provide super (a, d)-edge antimagic total labeling for disjoint union Harary graphs and disjoint union of cycles. We also provide (a, d)-vertex antimagic total labeling for disjoint union of Harary graphs, disjoint union of non isomorphic cycles, sun graphs and disjoint union of non isomorphic sun graphs.