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Search Results: 1 - 10 of 600984 matches for " A. R. Memon "
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Reversed-Phase Liquid Chromatographic Separation and Determination of Ni(II), Cu(II), Pd(II), and Ag(I) Using 2-Pyrrolecarboxaldehyde-4-phenylsemicarbazone as a Complexing Reagent
Arfana Mallah,Amber R. Solangi,Najma Memon,Rabia A. Memon
Journal of Chemistry , 2013, DOI: 10.1155/2013/184356
Abstract:
Surgical Treatment of Articular Cartilage Defects in the Knee: Are We Winning?
A. R. Memon,J. F. Quinlan
Advances in Orthopedics , 2012, DOI: 10.1155/2012/528423
Abstract: Articular cartilage (AC) injury is a common disorder. Numerous techniques have been employed to repair or regenerate the cartilage defects with varying degrees of success. Three commonly performed techniques include bone marrow stimulation, cartilage repair, and cartilage regeneration. This paper focuses on current level of evidence paying particular attention to cartilage regeneration techniques.
Surgical Treatment of Articular Cartilage Defects in the Knee: Are We Winning?
A. R. Memon,J. F. Quinlan
Advances in Orthopedics , 2012, DOI: 10.1155/2012/528423
Abstract: Articular cartilage (AC) injury is a common disorder. Numerous techniques have been employed to repair or regenerate the cartilage defects with varying degrees of success. Three commonly performed techniques include bone marrow stimulation, cartilage repair, and cartilage regeneration. This paper focuses on current level of evidence paying particular attention to cartilage regeneration techniques. 1. Introduction AC injury is a common disorder of the knee. It affects people of all ages and sexes. With the ever-increasing population and the active lifestyle of the older generation, incidence of AC injuries is on the rise. In the USA more than 500,000 procedures are performed for cartilage-related injuries and majority represent repeat procedures suggesting an ineffectiveness of surgical treatment [1]. The incidence of cartilage defects has been reported to be as high as 65% in routine knee arthroscopies [2–5]; however, the relevance of these defects to symptomatology is not yet clear. Hunter reported the inability of articular cartilage to regenerate in 1743 [6]. Early chondral lesions are often not detected due to lack of nerve supply, and the absence of vascularity limits the repair potential. AC integrity is important for various reasons. Firstly, chondral lesions may cause mechanical symptoms such as swelling and pain. Secondly the progression to osteoarthritis is accelerated as reported by Mankin and Davis [7, 8]. Sahlstorm has reported radiographic evidence of OA in 100% patients in Ahlbeck stage II and III lesions at 20 years [9]. And thirdly the complexity of its structure and functional properties such as minimizing friction and increasing contact surface area to decrease wear under load bearing makes it a difficult material to repair. AC works not only to protect the underlying subchondral bone but also serves to minimize friction and maximize load-bearing articular surface. Thus treatment of AC loss aims to restore these properties. AC is composed of chondrocytes (5–10%), water (65–80%), collagen, large negatively charged hydrophilic proteoglycans (aggrecan, hyaluronan), and smaller glycoproteins such as fibronectin and cartilage oligomeric proteins [10]. Microscopically, from superficial to deep, four distinct zones of AC are described [11]. The superficial zone is composed mainly of elongated chondrocytes. The smaller diameter collagen fibers (mainly type II) run parallel to the articular surface in this layer. The transitional zone is composed of large-diameter collagen fibers. The deep zone has perpendicularly arranged collages fibers and
Effect of Number of Irrigations on High Yielding Strain, CRIS-19 Developed at CCRI, Sakrand
M.S. Memon,A. R. Soomro,A. W. Soomro,A. A. Memon
Journal of Biological Sciences , 2001,
Abstract: A field experiment was conducted to assess the effect of four irrigation regimes (l1 =6, I2 =7, 13=8 and 14=9 including one irrigation as soaking dose) on a high yielding strain, CRIS-19 during 1997 and 1 998 crop seasons at CCRI, Sakrand Sindh. On an average, highest seedcotton yield of 1944 kg ha-1 was obtained when the crop received 8 irrigations followed by 9 and 6 irrigations where seedcotton yield of 1887 and 1808 kg ha-1 was obtained respectively. The lowest yield of 1763 kg ha-1 was produced when 6 irrigations were applied.
An Assessment of Regulatory Framework for Monitoring of Pesticides in Sindh Province of Pakistan
A.A. Khooharo,R.A. Memon,M.Y. Memon,M.U. Mallah
Journal of Applied Sciences , 2006,
Abstract: Numerous companies have entered the pesticide market in Pakistan due to windfall profits and liberal policies of the government since 1980s, when new agriculture policy was announced and the import and sale of pesticides were shifted to private sector. Easy imports, low prices and availability of a variety of pesticides are the distinct advantages of liberal policies. On the other hand, sale of substandard pesticides is a common problem of farming community due to regulatory and institutional deficiencies. This study was conducted to evaluate and to redesign regulatory framework for monitoring of pesticides by Agriculture Extension in view of stakeholders` perceptions during 2003-04. Finding of the study revealed that during three years (2000-2002) 2190 samples were tested in provincial laboratories of Sindh and 268 (12%) were declared substandard. Out of 268, 150 FIRs (56%) were lodged and 86 (32%) cases were challenged in courts while only 47 (18%) cases were decided by the courts. Majority of the stakeholders including District Officers Agriculture (100%) and Sales Executives(63%) were not satisfied with the present monitoring system for pesticides. All the Pesticide Dealers interviewed were of the opinion that pesticide companies be named in FIR when samples are declared unfit by the laboratories, because they purchase sealed pesticides from pesticide companies.
Self-Organized Detection of Relationships in a Network  [PDF]
Qurban A. Memon
Int'l J. of Communications, Network and System Sciences (IJCNS) , 2010, DOI: 10.4236/ijcns.2010.33039
Abstract: Multistate operations within a network result in high-dimensional, multivariate temporal data, and are useful for systems, which monitor access to network entities like resources, objects, etc. Efficient self organization of such multi-state network operations stored in databases with respect to relationships amongst users or between a user and a data object is an important and a challenging problem. In this work, a layer is proposed where discovered relationship patterns amongst users are classified as clusters. This information along with attributes of involved users is used to monitor and extract existing and growing relationships. The correlation is used to help generate alerts in advance due to internal user-object interactions or collaboration of internal as well as external entities. Using an experimental setup, the evolving relationships are monitored, and clustered in the database.
A REVIEW ON PROBIOTICS
Pathan Dilnawaz,Memon Shakeel,Ziyaurrahman A.R,Shaikh Tabreez
International Research Journal of Pharmacy , 2011,
Abstract: Probiotics are harmless bacteria that help the well being of the host animal and contribute, directly or indirectly to protect the host animal against harmful bacterial pathogens. They are also called “friendly bacteria” or “good bacteria”. Probiotics are available to consumers mainly in the form of dietary supplements and foods. They can be used as Complementary and alternative medicine (CAM). In controlled clinical trials probiotic bacteria have demonstrated a bene t in treating gastrointestinal diseases, including infectious diarrhea in children, recurrent Clostridium dif cile induced infection, and some in ammatory bowel diseases. This evidence has led to the proof of principle that probiotic bacteria can be used as a therapeutic strategy to ameliorate human diseases. Scientists have found that probiotic bacteria can thrive and function in the human digestive tract along with the existing microorganisms. There currently exists good evidence for the therapeutic use of probiotics in infectious diarrhea in children, recurrent Clostridium dif cile induced infections and postoperative pouchitis. The possible benefit in other gastrointestinal infections, prevention of postoperative bacterial translocation, irritable bowel syndrome and inflammatory bowel disease continues to emerge. The field of probiotics is developing rapidly as evidenced by expansion of research and increased familiarity of probiotics to the general public. Probiotic bacteria have been shown to influence the immune system through several molecular mechanisms.
Energy Efficient Content Based Image Retrieval in Sensor Networks  [PDF]
Qurban A. Memon, Hend Alqamzi
Int'l J. of Communications, Network and System Sciences (IJCNS) , 2012, DOI: 10.4236/ijcns.2012.57050
Abstract: The presence of increased memory and computational power in imaging sensor networks attracts researchers to exploit image processing algorithms on distributed memory and computational power. In this paper, a typical perimeter is investigated with a number of sensors placed to form an image sensor network for the purpose of content based distributed image search. Image search algorithm is used to enable distributed content based image search within each sensor node. The energy model is presented to calculate energy efficiency for various cases of image search and transmission. The simulations are carried out based on consideration of continuous monitoring or event driven activity on the perimeter. The simulation setups consider distributed image processing on sensor nodes and results show that energy saving is significant if search algorithms are embedded in image sensor nodes and image processing is distributed across sensor nodes. The tradeoff between sensor life time, distributed image search and network deployed cost is also investigated.
Effect of Nitrogen Alone and Combined with Phosphorus on Advance Strain CRIS-19
A. R. Soomro,A. W. Soomro,M. H. Arain,A. A. Memon
Pakistan Journal of Biological Sciences , 2000,
Abstract: A field experiment was laid out to assess the yield performance of an advance strain CRIS-19 with four fertilizer (NP) treatments during 1997, 1998 and 1999 crop seasons at CCRI, Sakrand Sindh. Results reveal that on an average, highest seedcotton yield of 1951 kg ha-1 was obtained when the crop was fertilized with 120 and 60 kg ha-1 of nitrogen and phosphorus respectively followed by 90 nitrogen and 30 kg ha-1 of phosphorus where seedcotton yield of 1830 kg ha-1 was obtained. The lowest yield of 1605 kg ha-1 was produced from the plot where 60 kg ha-1 of nitrogen and no phosphorus were used.
Assessment of Heterosis (F1) and Inbreeding Depression (F2) for Some Economic Characters in Upland Cotton
A. R. Soomro,A. W. Soomro,A. H. Soomro,Kaneez Soomro A. M. Memon
Pakistan Journal of Biological Sciences , 2000,
Abstract: Twelve parents in fourteen cross combinations were studied for heterosis in F1 and inbreeding depression in F2 populations for seedcotton yield, number of bolls per plant, ginning out turn %, staple length and uniformity ratio. Seedcotton yield and number of bolls expressed fair amount of heterosis, however, hybrids showing higher magnitudes of heterosis were generally associated with higher amount of inbreeding depression suggesting dominant genes functioning for these traits. Small amount of heterosis, lower magnitude of inbreeding depression for lint percent, staple length and uniformity ratio indicated that additive genes were responsible for the expressions of these traits. Hybrid vigor recorded in F1 in respect of seedcotton yield per plant ranged from 4.5 to 159.0 percent, whereas in bolls per plant, ginning out turn, staple length and uniformity ratio the range was 0 to 150.0, -1.5 to 11.7, 0.7 to 13.0 and -2.0 to 11.1% respectively.
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