Abdul Qayyum Khan | Pakistan Institute of engineering and applied science (PIEAS) (original) (raw)

Uploads

Papers by Abdul Qayyum Khan

Journal of Control Science and Engineering

Saudi Medical Journal, 2011

Degenerative changes in the spine can result in the formation of osteophytes on the anterior surf... more Degenerative changes in the spine can result in the formation of osteophytes on the anterior surface of the cervical spine. Depending on their site, osteophytes can bring on clinical manifestations such as dysphagia, hoarseness, and stridor. We discuss an interesting case of a young adult patient who presented with dysphagia along with neck discomfort, and on investigation was found to be suffering from diffuse idiopathic skeletal hyperostosis. Here, we briefly portray the presenting features, radiographic findings, and management options.

British Journal of Plastic Surgery, Jun 30, 2001

Eleven patients, with a mean age of 57 years, who had undergone radial forearm flap reconstructio... more Eleven patients, with a mean age of 57 years, who had undergone radial forearm flap reconstruction following the excision of intraoral carcinoma, underwent flap biopsy at a mean of 45 months postoperatively. Seven of the patients had received postoperative radiotherapy. In eight patients the clinical appearance of the flap was similar in colour to that of adjacent normal oral mucosa; the remaining flaps retained the appearance of normal volar forearm skin. Histological examination of the flaps showed varying degrees of telangiectasia and mild chronic inflammation. In only two patients was superficial infection by candida hyphae identified. Intraoral free flaps, although clinically resembling oral mucosa, retain histological features of skin, at least within the period under study. The erythematous clinical appearance was not correlated with the presence of chronic fungal infection, but reflected the presence of vascular repair tissue, telangiectasia and mild residual chronic inflammation.

Http Dx Doi Org 10 1080 09535319300000005, Jul 28, 2006

This information is provided to you by IDEAS at the Department of Economics, College of Liberal A... more This information is provided to you by IDEAS at the Department of Economics, College of Liberal Arts and Sciences, University of Connecticut using RePEc data on a server sponsored by the Society for Economic Dynamics.

Jpma Journal of the Pakistan Medical Association, Dec 1, 2012

Indian journal of orthopaedics

Gap nonunion of long bones is a challenging problem, due to the limitation of conventional recons... more Gap nonunion of long bones is a challenging problem, due to the limitation of conventional reconstructive techniques more so if associated with infection and soft tissue defect. Treatment options such as autograft with non-vascularized fibula and cancellous bone graft, vascularized bone graft, and bone transportation are highly demanding on the part of surgeons and hospital setups and have many drawbacks. This study aims to analyze the outcome of patients with wide diaphyseal bone gap treated with induced-membrane technique (Masquelet technique). This study included 9 patients (7 males and 2 females), all with tibial bone-gap. Eight of the 9 patients were infected and in 3 patients there was associated large soft tissue defect requiring flap cover. This technique is two-stage procedure. Stage I surgery included debridement, fracture stabilization, application of spacer between bone ends, and soft tissue reconstruction. Stage II surgery included removal of spacer with preservation of...

Journal Chemical Society of Pakistan, Dec 25, 2013

ABSTRACT Secondary metabolites have been isolated from the various species of the genus Haloxylon... more ABSTRACT Secondary metabolites have been isolated from the various species of the genus Haloxylon (Chenopodiaceae) including H. ammodendron, H. aphyllum, H. articulatum, H. griffithii, H. persicum, H. recurvum, H. salicornicum, H. schmittianum Pomel and H. scoparium. These compounds belong to the classes, fatty acids and their esters, triglycerides, alcohols, steroids and their glycosides, phenol derivatives, coumarins, alkaloids of different classes, monocyclic naphthene derivatives, terpenes and flavonoids, and their glycosides. This present review will discuss the secondary metabolites 1-107 of different classes isolated from Haloxylon species with biological activities up to 2010.

Saudi Medical Journal, Feb 1, 2011

ABSTRACT Giraffokeryx is represented in the middle Miocene vertebrate assemblage from the Chinji ... more ABSTRACT Giraffokeryx is represented in the middle Miocene vertebrate assemblage from the Chinji Formation by 13 remains. The material comprises predominantly isolated teeth, and a few fragments of maxilla and mandible. The well preserved upper and lower dentition allows recognizing the presence of Giraffokeryx cf. punjabiensis in the Chinji Formation of the Lower Siwaliks. A detailed description of the fossils and their taxonomic classification is being provided. The validity of the new species Giraffokeryx chinjiensis Sarwar, 1990 is discussed and the synonymy with Giraffa priscilla is proposed.

Acta Poloniae Pharmaceutica, Jul 1, 2014

Berberis orhob, otrvs Bien. ex Aitch. (B.o.) has been reported to have antihypertensive effect in... more Berberis orhob, otrvs Bien. ex Aitch. (B.o.) has been reported to have antihypertensive effect in different experimental models. The aim of present study was to evaluate the possible antihypertensive mechanism. Aqueous methanolic extract of B.o. roots and its various fractions namely (ethyl acetate, n-butanol or aqueous) in different concentrations (10 ng/mL, 100 ng/mL, I pg/mL, 10 pg/mL, 100 pg/mL ) were evaluated in isolated perfused rabbit heart to assess their effect on force of contraction, HR and perfusion pressure. The crude extract of B.o. and its fractions exhibited a significant decrease in heart rate, contractility and perfusion pressure of isolated rabbit heart, however, butanolic fraction produced more prominent effect and was selected for further study. The effects of butanol fraction were not blocked by atropine (10' M) in isolated perfused heart. However, butanol fraction significantly blocked the effects of adrenaline (10' M). It is therefore conceivable that cardiac depressant activity of B.o. butanol fraction might be due to the presence of certain 3-blocking agents which might be responsible for antihypertensive effect However, further experiments are required to isolate the active compound(s) and elucidate exact mechanism of action.

British Journal of Plastic Surgery, Sep 30, 2004

International Journal of Hospitality Tourism Administration, 2007

Mycorrhiza, 1997

Forest fire can affect arbuscular mycorrhizal (AM) fungi by changing the soil conditions and by d... more Forest fire can affect arbuscular mycorrhizal (AM) fungi by changing the soil conditions and by directly altering AM proliferation. We studied the effects of a severe forest fire at Margalla Hills near Islamabad on the number and viability of AM fungal propagules in the burnt soil and their role in the re-establishment of post-fire infection in colonized plants. Compared with

Bangladesh Journal of Pharmacology, Apr 22, 2013

Saudi Medical Journal, 2010

Journal of Control Science and Engineering

Saudi Medical Journal, 2011

Degenerative changes in the spine can result in the formation of osteophytes on the anterior surf... more Degenerative changes in the spine can result in the formation of osteophytes on the anterior surface of the cervical spine. Depending on their site, osteophytes can bring on clinical manifestations such as dysphagia, hoarseness, and stridor. We discuss an interesting case of a young adult patient who presented with dysphagia along with neck discomfort, and on investigation was found to be suffering from diffuse idiopathic skeletal hyperostosis. Here, we briefly portray the presenting features, radiographic findings, and management options.

British Journal of Plastic Surgery, Jun 30, 2001

Eleven patients, with a mean age of 57 years, who had undergone radial forearm flap reconstructio... more Eleven patients, with a mean age of 57 years, who had undergone radial forearm flap reconstruction following the excision of intraoral carcinoma, underwent flap biopsy at a mean of 45 months postoperatively. Seven of the patients had received postoperative radiotherapy. In eight patients the clinical appearance of the flap was similar in colour to that of adjacent normal oral mucosa; the remaining flaps retained the appearance of normal volar forearm skin. Histological examination of the flaps showed varying degrees of telangiectasia and mild chronic inflammation. In only two patients was superficial infection by candida hyphae identified. Intraoral free flaps, although clinically resembling oral mucosa, retain histological features of skin, at least within the period under study. The erythematous clinical appearance was not correlated with the presence of chronic fungal infection, but reflected the presence of vascular repair tissue, telangiectasia and mild residual chronic inflammation.

Http Dx Doi Org 10 1080 09535319300000005, Jul 28, 2006

This information is provided to you by IDEAS at the Department of Economics, College of Liberal A... more This information is provided to you by IDEAS at the Department of Economics, College of Liberal Arts and Sciences, University of Connecticut using RePEc data on a server sponsored by the Society for Economic Dynamics.

Jpma Journal of the Pakistan Medical Association, Dec 1, 2012

Indian journal of orthopaedics

Gap nonunion of long bones is a challenging problem, due to the limitation of conventional recons... more Gap nonunion of long bones is a challenging problem, due to the limitation of conventional reconstructive techniques more so if associated with infection and soft tissue defect. Treatment options such as autograft with non-vascularized fibula and cancellous bone graft, vascularized bone graft, and bone transportation are highly demanding on the part of surgeons and hospital setups and have many drawbacks. This study aims to analyze the outcome of patients with wide diaphyseal bone gap treated with induced-membrane technique (Masquelet technique). This study included 9 patients (7 males and 2 females), all with tibial bone-gap. Eight of the 9 patients were infected and in 3 patients there was associated large soft tissue defect requiring flap cover. This technique is two-stage procedure. Stage I surgery included debridement, fracture stabilization, application of spacer between bone ends, and soft tissue reconstruction. Stage II surgery included removal of spacer with preservation of...

Journal Chemical Society of Pakistan, Dec 25, 2013

ABSTRACT Secondary metabolites have been isolated from the various species of the genus Haloxylon... more ABSTRACT Secondary metabolites have been isolated from the various species of the genus Haloxylon (Chenopodiaceae) including H. ammodendron, H. aphyllum, H. articulatum, H. griffithii, H. persicum, H. recurvum, H. salicornicum, H. schmittianum Pomel and H. scoparium. These compounds belong to the classes, fatty acids and their esters, triglycerides, alcohols, steroids and their glycosides, phenol derivatives, coumarins, alkaloids of different classes, monocyclic naphthene derivatives, terpenes and flavonoids, and their glycosides. This present review will discuss the secondary metabolites 1-107 of different classes isolated from Haloxylon species with biological activities up to 2010.

Saudi Medical Journal, Feb 1, 2011

ABSTRACT Giraffokeryx is represented in the middle Miocene vertebrate assemblage from the Chinji ... more ABSTRACT Giraffokeryx is represented in the middle Miocene vertebrate assemblage from the Chinji Formation by 13 remains. The material comprises predominantly isolated teeth, and a few fragments of maxilla and mandible. The well preserved upper and lower dentition allows recognizing the presence of Giraffokeryx cf. punjabiensis in the Chinji Formation of the Lower Siwaliks. A detailed description of the fossils and their taxonomic classification is being provided. The validity of the new species Giraffokeryx chinjiensis Sarwar, 1990 is discussed and the synonymy with Giraffa priscilla is proposed.

Acta Poloniae Pharmaceutica, Jul 1, 2014

Berberis orhob, otrvs Bien. ex Aitch. (B.o.) has been reported to have antihypertensive effect in... more Berberis orhob, otrvs Bien. ex Aitch. (B.o.) has been reported to have antihypertensive effect in different experimental models. The aim of present study was to evaluate the possible antihypertensive mechanism. Aqueous methanolic extract of B.o. roots and its various fractions namely (ethyl acetate, n-butanol or aqueous) in different concentrations (10 ng/mL, 100 ng/mL, I pg/mL, 10 pg/mL, 100 pg/mL ) were evaluated in isolated perfused rabbit heart to assess their effect on force of contraction, HR and perfusion pressure. The crude extract of B.o. and its fractions exhibited a significant decrease in heart rate, contractility and perfusion pressure of isolated rabbit heart, however, butanolic fraction produced more prominent effect and was selected for further study. The effects of butanol fraction were not blocked by atropine (10' M) in isolated perfused heart. However, butanol fraction significantly blocked the effects of adrenaline (10' M). It is therefore conceivable that cardiac depressant activity of B.o. butanol fraction might be due to the presence of certain 3-blocking agents which might be responsible for antihypertensive effect However, further experiments are required to isolate the active compound(s) and elucidate exact mechanism of action.

British Journal of Plastic Surgery, Sep 30, 2004

International Journal of Hospitality Tourism Administration, 2007

Mycorrhiza, 1997

Forest fire can affect arbuscular mycorrhizal (AM) fungi by changing the soil conditions and by d... more Forest fire can affect arbuscular mycorrhizal (AM) fungi by changing the soil conditions and by directly altering AM proliferation. We studied the effects of a severe forest fire at Margalla Hills near Islamabad on the number and viability of AM fungal propagules in the burnt soil and their role in the re-establishment of post-fire infection in colonized plants. Compared with

Bangladesh Journal of Pharmacology, Apr 22, 2013

Saudi Medical Journal, 2010