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Search Results: 1 - 10 of 9450 matches for " Mahmood Ahmad "
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Effect of Firm Structure on Corporate Cash Holding (Evidence from Non-Financial Companies)  [PDF]
Sher Khan, Zhuangzhuang Peng, Sohail Ahmad, Shahid Mahmood, Ijaz Ahmad
Journal of Financial Risk Management (JFRM) , 2019, DOI: 10.4236/jfrm.2019.81001
Abstract: The purpose of this study is to investigate the effect of firm structure (whether diversified or focused firms) on corporate cash holding. Samples of 80 non-financial companies were selected including diversified and focused firms which were listed on Karachi stock exchange for a period 7 years from 2006 to 2013. These diversified and focused firms were selected on the basis of equal proportionate method. Random effect model and descriptive statistics were used for the analysis of these variables. The results of these models showed that there is negative and significant effect of firm structure on corporate cash holding. We also find negative and significant relationship of leverage and Networking capital with the corporate cash holdings and the relation between growth opportunities and corporate cash holding was examined to be positive and significant. We also find a negative and insignificant relationship between firm size and corporate cash holding. The descriptive statistics showed that there was significant difference between the cash holding of diversified and focused firms. The diversified firms keep a smaller amount of cash as compare to the single segment companies (focused firms), which is in support of the trade-off theory. This paper contributes to current literatures with regard to organization structure (whether diversified or focused firms) on cash holding in a developing economy like Pakistan.
Massive Levemir (Long-Acting) Insulin Overdose: Case Report
Mamatha Oduru,Mahmood Ahmad
Case Reports in Medicine , 2012, DOI: 10.1155/2012/904841
Abstract: A 52-year-old insulin-dependant diabetic man presented to the Emergency Department 2 hours after a deliberate massive overdose of 2100 units of long-acting Levemir insulin and a large quantity of whisky. On initial assessment, his GCS was 3/15 and his capillary blood sugar was 2.6 mmol/L. The patient was given a 50 ml bolus of 50% dextrose, followed by intravenous infusions of both 5% and 10% dextrose. Despite the continuous infusions, he experienced 4 symptomatic hypoglycaemic episodes in the first 12 hours after admission. These were managed with oral glucose, IM glucagon, and further dextrose boluses. Blood electrolytes and pH were monitored throughout. Insulin overdoses are relatively common and often occur with an excess of other drugs or alcohol which can enhance its action. Overdoses can result in persistent hypoglycaemia, liver enzyme derangement, electrolyte abnormalities, and neurological damage. Overall mortality is 2.7% with prognosis poorest in patients who are admitted with decreased Glasgow Coma scale (GCS) 12 hours after overdose.
An Empirical Investigation of the Association between Creative Advertising and Advertising Effectiveness in Pakistan
Wisal Ahmad,Zahid Mahmood
International Journal of Marketing Studies , 2011, DOI: 10.5539/ijms.v3n2p32
Abstract: The importance of creativity in advertising as one of the primary factor for advertising effectiveness has been much advocated by advertising professionals and academicians particularly in a cluttered media. Industry experts argue that advertisements have to be more creative to break through the greater media clutter and develop an impression for the brand. This study examines the potential effectiveness of award winning television advertisements in Pakistan in both single and three advertising exposures. To ensure a real life advertising situation, both creative and control advertisements were embedded in a television program which were shown to two separate groups of research subjects with single and three advertising exposures respectively. Based on recall of the experimental advertisements in single and three exposures, subjects’ tapped their responses about brand and advertisement attitude and lastly purchase intent. Contrary to expectations, the finding of this study in single exposure does not verify the superior performance of creative advertising in terms of recall, brand and advertisement attitude and purchase intent. However, in three exposures, creative advertisements developed significantly more favorable brand and advertisement attitude and greater unaided brand recall than control advertisements. Creative advertisements developed greater mean purchase intent for the advertised brands than control group of advertisements; however, it just slipped from attaining significance. Being an optimum and more mature response of research participants in three exposures as compared to single exposure, the results of this study in three exposures conclude that creative advertisements are really more effective than conventional advertisements and bestow value to the advertised brands.
What do we know about interactive computer-assisted screening for intimate partner violence and control in clinical settings? A systematic review
Farah Ahmad,Sadia Mahmood
Italian Journal of Public Health , 2010, DOI: 10.2427/5728
Abstract: Background: Intimate partner violence is a major public health issue, particularly among women. Abused women experience many acute and chronic health consequences resulting in frequent healthcare visits. There exists a system-level opportunity to intervene, yet abused women refrain from spontaneous disclosure of their experiences of victimization due to embarrassment. Meanwhile providers often fail to ask due to lack of time, priority of acute medical problems and discomfort. Missed opportunities to detect intimate partner violence and control (IPVC) can be availed by computer-assisted interactive screening. Aim: The purpose of this paper is to critically review current scientific knowledge on the use of enhanced Web 2.0 interactive computer-assisted screening for IPVC in clinical settings. Methods: A systematic review of peer-reviewed published literature was conducted using Medline and PsychInfo data bases from 1996 to 2010. Eligibility criteria were applied to the identified records. Additional studies were identified by searching reference list and contacting authors. Eight eligible studies were appraised for the study characteristics and IPVC related outcomes for the process-of-care, patient, and provider. Results: The selected studies (descriptive, randomized trial, and qualitative) were conducted in the emergency and family medicine settings on two programs of research which used similar interactive computer screen, Promote Health. The reviewed evidence supports the effectiveness of computer screening for improving provider-patient communication on IPVC in both settings and compromised mental health in family medicine. However the management of detected cases of IPVC by time-pressed frontline clinicians needs a more supportive environment. The need for such system-level support is greater for the emergency setting. Conclusions: The use of computer-assisted screening in similar settings can enhance the detection and disclosure of IPVC, although a coordinated multiservice response is needed to address it comprehensively. Future studies should examine the development of a coordinated response and the role of context on the success or failure of such program.
PRODUCTION OF TROPANE ALKALOIDS BY TRANSFORMED HAIRY ROOT CULTURES OF Datura metel
AZIZ AHMAD,MARZIAH MAHMOOD
Journal of Sustainability Science and Management , 2007,
Abstract: There remains a need to increase alkaloid production rates to favor their commercial exploitation as the growth and production of secondary metabolites is strongly influenced by the environmental factors. Datura metel transformed hairy roots obtained through infection with Agrobacterium rhizogenes LBA 9402, were employed for production of tropane alkaloids in vitro. The production of hyoscyamine and scopolamine by the hairy root cultures were investigated on three types of media at different ionic strength and sucrose concentrations. Roots cultured in B5 medium were observed to exhibit better growth and tropane alkaloid production compared to MS and White’s medium. The full strength of B5 medium supplemented 4% (w/v) of sucrose was yields the highest roots mass (550 mg dry wt. per flask), as well as the hyoscyamine and scopolamine which was 1.52 and 0.32 mg/g dry wt. of tissue, respectively. This indicated that, mineral nutrient and sucrose play an important role in tropane alkaloids biosynthesis by hairy root cultures.
Comparison of In Vitro and In Situ Methods for Studying Lipolysis
Ahmad Ghorbani,Mahmood Abedinzade
ISRN Endocrinology , 2013, DOI: 10.1155/2013/205385
Abstract: Lipolysis is a highly regulated process and is controlled by nervous system, hormones, and paracrine/autocrine factors. Dysregulation of lipolysis is associated with some pathophysiological conditions including diabetes, metabolic syndrome, and obesity. Nowadays, special attention isthereforepaid to study lipolysis using different experimental models. This review summarizes the current experimental methods for studying lipolysis. Culture of preadipocyte cell lines, use of differentiated stroma-vascular cells, primary culture of adipocyte, organ culture of adipose tissue, and microdialysis technique are the most widely used techniques to study lipolysis. The advantages and limitations of using these methods are discussed. 1. Introduction Adipose tissue is one of the largest body compartments with various physiological roles including lipid handling and hormone secretion. It is responsible for the storage of fat as triglyceride (via lipogenesis) during times of energy excess and for the mobilization of triglyceride (via lipolysis) during periods of calories deficit [1]. Hormone-sensitive lipase, a rate-limiting enzyme, and monoglyceride lipase catalyse hydrolysis of triglyceride to release fatty acids and glycerol. Unlike fatty acids, glycerol is not reutilized by adipocytes because these cells contain very little glycerol kinase [2]. Therefore, measurement of glycerol gives a good estimate for level of lipolysis [3]. Lipolysis is a highly regulated process and is disciplined by nervous system, hormones (e.g., insulin and catecholamines), and paracrine/autocrine factors (e.g., adenosine, prostaglandins, nitric oxide, and TNF-α) [1, 3–5]. Physical activity, nutrition, gender, age and genetic are also important determinant factors for lipolysis [2, 4]. Dysregulation of lipolysis is associated with a number of pathophysiological conditions such as obesity, diabetes, metabolic syndrome, familial combined hyperlipidaemia, and polycystic ovarian syndrome [4]. Nowadays, special attention is therefore paid to study lipolysis and other aspects of adipose tissue metabolism. While isotopic tracer techniques and arteriovenous difference method allow in vivo estimation of lipolysis, culture of preadipocyte cell lines, primary culture of adipocyte, organ culture of adipose tissue, and microdialysis are of the most used techniques for studying lipolysis in vitro and in situ. This review summarizes the in vitro and in situ techniques for studying lipolysis in animal and humans. Moreover, the advantages and drawbacks of using each method are discussed (Table 1). Table 1:
A New Version of the Menages Problem
Ahmad Mahmood Qureshi
Mathematics , 2007,
Abstract: The probleme des menages (married couples problem) introduced by E.Lucas in 1891 is a classical problem that asks the number of ways to arrange n married couples around a circular table, so that husbands and wives are in alternate places but no couple is seated together. In this paper we present a new version of the Menage Problem that carries the constraints consistent with the Muslim culture.
Evaluation of Structural Patterns and Related Alteration and Mineralization Zones by Using ASAR-ASTER Imagery in Siyahrood Area (East Azarbaijan—NW Iran)  [PDF]
Shabnam Khosroshahizadeh, Mohsen Pourkermani, Mahmood Almasiyan, Mehran Arian, Ahmad Khakzad
Open Journal of Geology (OJG) , 2015, DOI: 10.4236/ojg.2015.59053
Abstract: The NW part of Iran belongs to the Iranian plateau that is a tectonically active region within the Alpine-Himalayan orogenic belt. The intrusion of Oligocene parts in various faces caused the alteration and mineralization such as copper, molybdenum, gold and iron in the Siyahrood area. Granitoidic rocks with component of Granodiorite to alkali have been influenced by hydrothermal fluids. Alteration zones are important features for the exploration of deposits and the ASTER sensor is able to identify the type of alteration and its alteration zoning. This method can be a useful tool for detecting potential mineralization area in East Azarbaijan—Northwest of Iran. The purpose of this study is to evaluate ASTER data for mapping altered minerals in Siyahrood area in order to detect the potential mineralized areas. In this study, false color composite, and band ratio techniques were applied on ASTER data and argillic, phyllic, Iron oxide and propylitic alteration zones were separated. ASAR image processing has been used for lineaments and faults identified by the aid of directional filter. The structural study focused on fracture zones and their characteristics including strike, length, and relationship with alteration zones. The results of this study demonstrate the usefulness of remote sensing methods and ASTER multi-spectral data for alteration, and ASAR data are useful for lineament mapping.
Lineament Patterns and Mineralization Related to Alteration Zone by Using ASAR-ASTER Imagery in Hize Jan-Sharaf Abad Au-Ag Epithermal Mineralized Zone (East Azarbaijan—NW Iran)  [PDF]
Shabnam Khosroshahizadeh, Mohsen Pourkermani, Mahmood Almasian, Mehran Arian, Ahmad Khakzad
Open Journal of Geology (OJG) , 2016, DOI: 10.4236/ojg.2016.64021
Abstract: East Azarbaijan belongs to the Iranian plateau and is part of lesser Caucasus province.Studiedarea is located in west-central Alborz. The intrusion of oligocene bodies in various units causes the alteration and mineralization in northwest of Iran. The Hizejan-Sharafabad is one of this named mineralized zone. Granitoidicrocks with component of Granodiorite to alkali have been influenced by hydrothermal fluids. Fractures and faults are as weak zone in earth surface and hydrothermalfluidsrise to surface by these geological structures. These solutions cause to alteration in host rocks. Alteration zones are important features for the exploration of deposits. The altered rocks have specific absorption in some spectral portion and ASTER sensor is able to identify the type of alteration. Remote sensing method is useful tool for discovering altered area. The purpose of this study is to appraise ASTER data for surveying altered minerals in Hizejan-Sharafabad area in the event of detecting the potential mineralized areas. In this research, False Color Composite (FCC), Band ratio, and color composite ratio techniques are applied on ASTER data and Silica, Argilic, and Propylitic alteration zones are detected. These alteration types and mineralized area are related to Hizejan–Sharafabad fault which is absent in the fault maps. ASAR image processing has been used for lineaments and faults identified by the aid of Directional and Canny Algorithm filters. The structural study focuses on fracture zones and their characteristics including strike, length, and relationship with alteration zones.
Morpho-Physiological Traits Linked to High Temperature Stress Tolerance in Tomato (S. lycopersicum L.)  [PDF]
Muhammed Alsamir, Nabil M. Ahmad, Tariq Mahmood, Richard Trethowan
American Journal of Plant Sciences (AJPS) , 2017, DOI: 10.4236/ajps.2017.811180
Abstract: The identification of heat tolerance traits that express across environments is key to the successful development of high temperature tolerant tomatoes. A replicated experiment of 145 tomato genotypes was established at two temperature regimes in two planting seasons using hydroponics in a poly greenhouse to assess high temperature tolerance. Electrolyte leakage, number of inflorescences, number of flowers and fruits, fresh fruit weight and fresh and dry plant weight were measured and genotype and temperature treatment differences were observed for all traits. Planting season impacted all traits except electrolyte leakage and number of flowers. High temperature reduced number of fruits by 88.8%, flower fruit set ratio by 77.2% and fresh fruit weight by 79.3%. In contrast, traits little impacted by temperature included number of flowers per inflorescence (1.3%) and plant dry weight (11.1%). The correlation between plant dry weight under both high and optimal temperature was significant (R2 = 0.82). To assess the effectiveness of plant dry weight and flower-fruit set ratio for selection under heat stress two subsets of genotypes (A and B) comprising ten and six genotypes respectively, were subsequently selected on the basis of their dry weight loss and flower-fruit set ratio under high temperature. Organic metabolite analyses of set A and B respectively, showed a significant change (%) in citric acid (77.4 and 15.4), L-proline (117.8 and 40.2), aminobutyric acid (68.6 and 11.8), fructose (24.9 and 21.3), malic acid (50.3 and 42.7), myo-inositol (55.1 and 6.1), pentaerythitol (54.1 and 39.0) and sucrose (34.7 and 25.8). The change (%) in all metabolites was greater in heat tolerant genotypes with the exception of fructose and sucrose where sensitive genotypes produced a higher variation. The change in sucrose in tolerant genotypes was variable in subset A and more uniform in subset B. Flower-fruit set ratio was found as a reliable trait for
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