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Search Results: 1 - 10 of 8147 matches for " Imtiaz Ahmad "
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Desulphurization of Transportation Fuels by Per-Formic Acid Oxidant Using MoOx Loaded on ZSM-5 Catalyst  [PDF]
Waqas Ahmad, Imtiaz Ahmad
Journal of Power and Energy Engineering (JPEE) , 2017, DOI: 10.4236/jpee.2017.512011
Abstract:
Desulphurization of model and real oil samples was investigated using performic acid as oxidant assisted by air as co-oxidant. The catalysts used were Mo-oxide supported on ZSM-5 zeolite, which was synthesized in the laboratory and characterized by FT-IR, XRD, SEM and SSA analysis. In case of model oil, the optimum condition determined for complete oxidation of all the model compounds including thiophene, DBT and 4,6-DMDBT were; 60?C, 60 min, ambient pressure and air flow rate of 100 mL/min. The oxidation reactivity decreased from 4,6-DMDBT to DBT and thiophene, which was found to follow pseudo first order kinetics. The real oil sample used in the study included untreated naphtha (NP), light gas oil (LGO), heavy gas oil (HGO) and Athabasca bitumen (Bit.). In case of NP and LGO the sulfur removal of above 78% was attained whereas in case of HGO and Bit. samples about 60% of desulfurization was achieved.
MEASUREMENT OF UPPER END OF DRIED HUMAN FEMUR ACROSS
Imtiaz Ahmad
The Professional Medical Journal , 1997,
Abstract: Sixty numbers dried human femur were studies to measure the length of head, neck and upper junctionalshaft in one continuous like to calculate the total length of upper end of femur across. It measures asfollow; Mean length = 9.54 + 0.81
FACETS FOR TALUS ON DORSAL SURFACE OF HUMAN CALCANEI
Imtiaz Ahmad
The Professional Medical Journal , 1997,
Abstract: OBJECTIVES: To find out the racial and regional diffences of articular facets on the dorsal surface of OSCalcisof Pakistani's of Punjab. MATERIAL AND METHODS: All the OS calcis (93) present in the bonebank of department of Anatomy Punjab Medical College Faisalabad were studied macroscopically with thehand lens. RESULTS: Type A = Calcanei with two anterior articular facets; Type B=Calcanei with singleanterior articular facets; Type C=Anterior and posterior articular facets confluent. We found 27.95% (26cases) type A calcanei and 72.04% (67 cases) type B calcanei. No calcanei of type C were seen.CONCLUSION: Variations of facets for talus on dorsal surface of calcanei are due to racial and regionaldifferences.
INFLUENCE OF SOME INTERCALATIONS ON ACTIVATION OF PRE-BAKED CLAY
AHMAD,IMTIAZ; ULLAH,HAMEED;
Journal of the Chilean Chemical Society , 2009, DOI: 10.4067/S0717-97072009000300005
Abstract: we report on the influence of temperature, mixing ratio and holding time of naoh & koh intercalations on the surface area, micropore volume and micropore width of pre-baked clay samples. pore size & surface area analyzer was used to measure the surface area, micropore volume and average pore width using dubinin-radushkevich (dr) method. a meaning full effect was observed when the temperature was increased from ambient up to 150 °c in case of both intercalating agents. increasing temperature beyond 150 °c caused a decline in surface area generation even up to 750 °c. the results also show that mixing ratio has a positive effect on the porosity and the micropore surface area inereases as the mixing ratio inereases in case of both intercalating agents. the influence of holding time shows two different trends. in case of naoh, the porosity inereases as the time inereases while in case of koh, the porosity decreases as the time inereases. sem, edx and xrd studies were also performed. the results show effective insertion of the sodium and potassium into the clay matrix thereby causing generation of porosity.
DRUG ABUSE
IMTIAZ AHMAD DOGAR
The Professional Medical Journal , 2005,
Abstract: Background: Drug abuse is one of the major problems facing the worldtoday. Care providers and clinicians are faced with ever changing patterns of drug abuse and hence need to stayabreast of the latest developments. Research in this area in Pakistan is direly needed. Aims: This study wasundertaken with an idea of collecting basic data to assess the extent and variety of drug abuse in patients presentingto the researchers, and to assess the changes during a five-year interval. Design of study: Non-interventionalcomparative study. Setting: Department of Psychiatry, District Headquarters Hospital, Faisalabad Period: From1996to 2001. Materials & Methods: The sample consisted of patients admitted for treatment in the years 1996 & 2001.Statistical analysis was carried out using the software package SSPS utilizing tests such as the chi square andstudent’s t-test. Results: In this department, drug abuse is more frequently reported among urban, literate, marriedmales during young adulthood. Tobacco and cannabis are most frequently reported. Sex, curiosity and peer pressureare the main motivations involved in starting drug abuse. Besides these stable findings, some changes have occurredduring five years; polydrug abuse has become more frequent and the socioeconomic status of this patient group isdeteriorating. Conclusions: The problem of drug abuse is still rampant, if not increasing with time. The patterns of drugabuse are becoming more complicated, posing new challenges for health care planners and providers. More researchneeds to be undertaken in this area.
ETIOLOGICAL GENDER DIFFERENCES IN PSYCHIATRIC DISORDERS
IMTIAZ AHMAD DOGAR
The Professional Medical Journal , 2006,
Abstract: Background: Recent studies have shown particular differences foundin both gender neurotic disorders but not in psychotic disorders with regard to environmental factors. But research inthis area in Pakistan is direly needed. Aims & Objectives: To find out what gender; either male or female more affectfrom environmental factors whether they are susceptible of that disorder or not and to find out the “etiology of genderdifferences in psychological disorder”. Design: Non-interventional comparative study. Setting: Department ofPsychiatry, District Headquarters Hospital, Faisalabad. Period: From May 2005 to Oct 2005. Material and Methods:A total of 80 patients of all ages are taken from in which we divide the sample i.e. each disorder comprises of 20patients 10 male and 10 females. The Hospital that used is DHQ Hospital Faisalabad. We have used the randomselection. The study is comprises of patient having Mood disorder, Anxiety, schizophrenia and personality disorder.For the simple analysis of data, percentages were applied for the statistical analysis. Results: The result showed thathypothesis is supported because there are significant differences (i.e. 42.5% > 30%) found as environmental factorsaffect more universally on females. Conclusion: Environmental factors affect more in women psychological health.Etiological gender differences in psychological disorders with special reference of mood disorder, anxiety disorder,schizophrenia and personality disorders are real and these gender differences may be due to their both nature ornurture gender. There are significant etiological gender differences in neurotic disorders i.e. Depression and anxietydisorder and minor difference in psychotic disorders i.e. Schizophrenia and mania.
Comparative Genomic Studies in Leguminous Species
Imtiaz Ahmad Khan
Current Research Journal of Biological Sciences , 2010,
Abstract: Comparative Genomics is relatively a new discipline of Genetics, which deals with the relationshipsbetween the genomes of genera, species, varieties or strains. For elaborating comparative genomics of legumes;fourteen accessions belonging to seven species viz; Vigna radiate, Vigna mungo, Vicia ervilia, Vicia faba,Phaseolus vulgaris, Cicer arietinum and Lens culinaris, were analyzed using Randomly AmplifiedPolymorphic DNA (RAPD). Alleles of various sizes ranging from 500-1400 bp were amplified. On an average3.5 allele per genotype were amplified. The average genetic distance ranged from 4-91%. Phylogeneticrelationship among the legumes based upon DNA analysis was studied through dendrogram analysis. All theaccessions were clustered in 6 groups. It was found that Vigna radiata and Vigna mungo accessions were mostdistantly related to each other.
INFLUENCE OF SOME INTERCALATIONS ON ACTIVATION OF PRE-BAKED CLAY
IMTIAZ AHMAD,HAMEED ULLAH
Journal of the Chilean Chemical Society , 2009,
Abstract: We report on the influence of temperature, mixing ratio and holding time of NaOH & KOH intercalations on the surface area, micropore volume and micropore width of pre-baked clay samples. Pore size & surface area analyzer was used to measure the surface area, micropore volume and average pore width using Dubinin-Radushkevich (DR) method. A meaning full effect was observed when the temperature was increased from ambient up to 150 °C in case of both intercalating agents. Increasing temperature beyond 150 °C caused a decline in surface area generation even up to 750 °C. The results also show that mixing ratio has a positive effect on the porosity and the micropore surface area inereases as the mixing ratio inereases in case of both intercalating agents. The influence of holding time shows two different trends. In case of NaOH, the porosity inereases as the time inereases while in case of KOH, the porosity decreases as the time inereases. SEM, EDX and XRD studies were also performed. The results show effective insertion of the sodium and potassium into the clay matrix thereby causing generation of porosity.
A Revision of Neomegalotomus (Hemiptera: Alydidae)
Schaefer, Carl W.;Ahmad, Imtiaz;
Neotropical Entomology , 2008, DOI: 10.1590/S1519-566X2008000100005
Abstract: we recognize two species in neomegalotomus, n. parvus (westwood), the type species; and n. rufipes (westwood). the two species are redescribed from type specimens, and are keyed. we synonymize the following species with neomegalotomus parvus: n. simplex (westwood), n. latifascia (berg), and n. pallescens (st?l) (all new synonymies). we synonymize n. jamaicensis (westwood) with n. rufipes (new synonymy). the type specimens of all species hitherto placed in the genus are also redescribed, except those of n. debilis (walker) and n. vicinus (westwood). n. parvus occurs from méxico through central america into northern argentina and east into venezuela and adjacent caribbean islands. n. rufipes is widespread in the caribbean south towards venezuela. the two species overlap in distribution: n. parvus is found on st. vincent and tobago, whereas n. rufipes occurs on grenada, which lies between those two islands.
Abel-Grassmann Groupoids of Modulo Matrices
Muhammad Rashad Amanullah,Imtiaz Ahmad
Mathematics , 2014,
Abstract: The binary operation of usual addition is associative in all common matrices over R. However, here we define a binary operation of addition in matrices over Zn which present the concept of nonassociativity. These structures form Matrix AG-groupoids and Matrix AG-groups over modulo integers Zn. We show that both these structures exist for every integer n geq 3, and explore some of their properties like: (i). Every matrix AG-groupoid G_n AG(t, u), is transitively commutative AG-groupoid and is a cancellative AG-groupoid if n is prime. (ii). Every matrix AG-groupoid of Type G_AG-II(n) is T3-AG-groupoid. (iii). A matrix AG-groupoid G_nAG(t, u) is an AG-band, if t + u = 1(mod n).
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