Daniyal Ahmad - Academia.edu (original) (raw)

Papers by Daniyal Ahmad

World Academy of Science, Engineering and Technology, International Journal of Economics and Management Engineering, Apr 24, 2017

Angewandte Parasitologie, 1965

Day 1 Mon, March 13, 2023

Field A is one of the most challenging fields in the Potowar region of Northern Pakistan with sev... more Field A is one of the most challenging fields in the Potowar region of Northern Pakistan with severe problems of fluid loss, high-pressure shallow water influx, low drillability, clay reactivity/ shale instability and depleted reservoir sections. This paper gives a brief overview of the methods and changes made along with results achieved, enabling the well to reach total depth in just 31 days compared to an average of 150 days taken on offset wells. Due to severe drilling challenges, the wells were drilled in six-hole sections starting with 36″ surface hole. An entirely new well engineering strategy has been utilized to enhance the drilling performance in the last five wells drilled in the field. Some of the major areas of change include Customized bit design, BHA and hydraulics design, casing design optimization and change in casing seat strategy as well as novel changes in drilling fluid design and selection of Loss Control Material. Dysfunctions and limiters in drilling which we...

Plants

Rice (Oryza sativa) is an important staple food crop worldwide, especially in east and southeast ... more Rice (Oryza sativa) is an important staple food crop worldwide, especially in east and southeast Asia. About one-third of rice cultivated area is under saline soil, either natural saline soils or irrigation with brackish water. Salinity stress is among the devastating abiotic stresses that not only affect rice growth and crop productivity but also limit its cultivation area globally. Plants adopt multiple tolerance mechanisms at the morphological, physiological, and biochemical levels to tackle salinity stress. To identify these tolerance mechanisms, this study was carried out under both a controlled glass house as well as natural saline field conditions using 22 green super rice (GSR) lines along with two local varieties (“IRRI 6 and Kissan Basmati”). Several morpho-physiological and biochemical parameters along with stress-responsive genes were used as evaluation criteria under normal and salinity stress conditions. Correlation and Principal Component Analysis (PCA) suggested that...

World Academy of Science, Engineering and Technology, International Journal of Economics and Management Engineering, 2017

Journal of the Bombay Natural History Society, 1965

iScience, 2019

The cellular response to hypoxia is crucial to organismal survival, and hypoxia-inducible factors... more The cellular response to hypoxia is crucial to organismal survival, and hypoxia-inducible factors (HIF) are the key mediators of this response. HIF-signaling is central to many human diseases and mediates longevity in the nematode. Despite the rapidly increasing knowledge on RNA-binding proteins (RBPs), little is known about their contribution to hypoxia-induced cellular adaptation. We used RNA interactome capture (RIC) in wild-type Caenorhabditis elegans and vhl-1 loss-of-function mutants to fill this gap. This approach identifies more than 1,300 nematode RBPs, 270 of which can be considered novel RBPs. Interestingly, loss of vhl-1 modulates the RBPome. This difference is not primarily explained by protein abundance suggesting differential RNA-binding. Taken together, our study provides a global view on the nematode RBPome and proteome as well as their modulation by HIF-signaling. The resulting RBP atlas is also provided as an interactive online data mining tool (http://shiny.cecad.uni-koeln. de:3838/celegans_rbpome).

Energy Conversion and Management, 2017

The idea of converting body heat to electrical energy is attractive, since it could help the shor... more The idea of converting body heat to electrical energy is attractive, since it could help the short discharge time and replacement

JPMA. The Journal of the Pakistan Medical Association, 2005

To assess the success rate of tracheoesophageal voice prosthesis as the primary mode of voice reh... more To assess the success rate of tracheoesophageal voice prosthesis as the primary mode of voice rehabilitation in patients after total laryngectomy. Medical record files of 35 patients subjected to total laryngectomy were reviewed for determining success or failure of the voice prosthesis. The indicators used were quality of speech and utility of the device. Subsequent complications that developed were also assessed. In addition other factors taken into consideration were pharyngeal myotomy, use of radiation, and timing of replacement. All thirty five patients (n=35) had prosthesis placed at the time of laryngectomy. The success rate at one month and four months follow up was 85.18%. Of note, 3 patients were lost to follow-up, 3 patients died of disease and 2 had recurrence of disease. Our results confirm the effectiveness, longevity and safety of the tracheoesophageal voice prosthesis for speech rehabilitation following total laryngectomy.

Global Journal of …, 2012

© 2012 . Yasir Hassan, Farooq Shahid, Daniyal Ahmad, Faisal Nadeem, Faizan Khalid, Nadir Khan, Hu... more © 2012 . Yasir Hassan, Farooq Shahid, Daniyal Ahmad, Faisal Nadeem, Faizan Khalid, Nadir Khan, Humza Shoaib , Jaffer Mehmood, Sehrish Majeed & Adnan Abdul Razzaq.This is a research/review paper, distributed under the terms of the Creative Commons Attribution ...

Zebrafish, 2009

Zebrafish are ideal for experimental studies in the classroom because, in contrast to chicks or m... more Zebrafish are ideal for experimental studies in the classroom because, in contrast to chicks or mammals, fish embryos are relatively easy and inexpensive to maintain, and embryonic development can be observed with common classroom equipment. The eight student-developed laboratory exercises described here have been used by students in Neuroscience Research at Sidwell Friends School. This course uses zebrafish as a vertebrate model to study genetics, development, behavior, neurobiology, regeneration, learning, and memory. The students develop protocols through collaboration with the teacher and scientists in specific fields. Through individual research, students develop and perform their own experiments, formulate and test hypotheses, learn basic laboratory and microscopy techniques, collect and analyze data, read original scientific literature, and collaborate with prominent zebrafish researchers.

International Journal of Tropical Insect Science, 2021

Aedes aegypti L. and Culex quinquefasciatus Say, which are the major vectors of dengue and yellow... more Aedes aegypti L. and Culex quinquefasciatus Say, which are the major vectors of dengue and yellow fever, respectively, could be managed in an effective way by targeting their immature stages. In the present study, we evaluated the effects of interspecific competition between Ae. aegypti and Cx. quinquefasciatus on their fitness and biology. This experiment consisted of three treatments: Ae. aegypti and Cx. quinquefasciatus together (interspecific competition treatment abbreviated as In-Aa and In-Cq), only Ae. aegypti (Aa), and only Cx. quinquefasciatus (Cq). Larval development was significantly slower in In-Aa as compared to Aa and that of In-Cq compared with Cq. The pupal weight of In-Aa (2.25 mg) was significantly lower as compared to Aa (2.45 mg) while there was no difference in pupal weight between In-Cq (2.55 mg) and Cq (2.37 mg). Fecundity of In-Aa females was significantly lower than Aa females but no difference was found between In-Cq and Cq. The hatching percentage of In-Aa (52.65) compared with Aa (67.83) and In-Cq (67.17) compared with Cq (71.30) was similar. Importantly, the intrinsic rate as well as biotic potential in co-habitating insects was significantly lower than their respective non-co-habitants. Therefore, it could be concluded that co-occurrence of Ae. aegypti and Cx. quinquefasciatus has a strong potential to induce negative impact on their life history traits due to interspecific competition.

Journal of Economic Entomology, 2017

Mosquitoes are known to be vectors of numerous diseases leading to human morbidity and mortality ... more Mosquitoes are known to be vectors of numerous diseases leading to human morbidity and mortality at large scale in the world. Insecticide resistance has become a serious concern in controlling the insect vectors of public health importance. Dimethoate is an organophosphate insecticide used to control different insect pests including mosquitoes. Biological parameters of susceptible, unselected, and dimethoate-selected strains of Culex quinquefasciatus Say were studied in the laboratory to recognize resistance development potential and associated fitness cost. The dimethoate-selected strain showed 66.48-fold resistance to dimethoate compared with the susceptible strain after three continuous selections of generations. Realized heritability estimates of dimethoate resistance in Cx. quinquefasciatus yielded a value of 0.19. In dimethoate-selected strain, the biological traits including larval weight, survival from first instar to pupae, fecundity, number of next-generation larvae, relative fitness, net reproductive rate, intrinsic rate of natural increase, and biotic potential were significantly reduced as compared with the unselected strain. However, adult longevity, mean relative growth rate, weight of egg raft, female ratio, pupal duration, and emergence rate of the dimethoate-selected strain did not differ significantly compared with that of the unselected strain. This study provides useful information to devise retrospective management strategy for dimethoate resistance in Cx. quinquefasciatus.

Parasitology research, Jan 17, 2016

The Culex quinquefaciatus Say, commonly known as the southern house mosquito, is well known for b... more The Culex quinquefaciatus Say, commonly known as the southern house mosquito, is well known for biting nuisance and vectoring of some fatal diseases. Synthetic chemicals have been relied upon as the major control measure to control mosquitoes. Therefore, we have evaluated 21 insecticides belonging to different chemical classes for their toxicity to C. quinquefaciatus females. Chlorfenapyr was the most toxic adulticide among all the tested insecticides. Among pyrethroids, deltamethrin was the least toxic adulticide, and all other have same toxicity. In case of organophosphates, the chlorpyrifos was the most toxic insecticide. Neonicotinoids such as acetamiprid, nitenpyram, and clothianidin have similar toxicity based on overlapping of 95 % confidence intervals (CI) and were more toxic when compared with the imidacloprid. The spinetoram was more toxic as compared with the spinosad (based on non-overlapping 95 % Cl). In case of ketoenoles, spirotetrament was more toxic as compared with...