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Anti-HIV Activity of Dehydroaltenusin-a Metabolite from a Streptomyces sp.
Abdul Jabbar,Ajude Prashad Shresta,Choudhury Mahmood Hasan,Mohammad Abdur Rashid 한국생약학회 1999 Natural Product Sciences Vol.5 No.4
Dehydroaltenusin (1) was isolated from the chloroform extract of the culture filtrate of a Streptomyces sp. and its structure was determined from spectral data as well as by comparison with published values. In an XTT-based in vitro anti-HIV assay, dehydroaltenusin effectively inhibited the cytopathic effects of HIV infection at a concentration of 1-5 ㎍/mL.
FD-StackGAN: Face De-occlusion Using Stacked Generative Adversarial Networks
( Abdul Jabbar ),( Xi Li ),( M. Munawwar Iqbal ),( Arif Jamal Malik ) 한국인터넷정보학회 2021 KSII Transactions on Internet and Information Syst Vol.15 No.7
It has been widely acknowledged that occlusion impairments adversely distress many face recognition algorithms' performance. Therefore, it is crucial to solving the problem of face image occlusion in face recognition. To solve the image occlusion problem in face recognition, this paper aims to automatically de-occlude the human face majority or discriminative regions to improve face recognition performance. To achieve this, we decompose the generative process into two key stages and employ a separate generative adversarial network (GAN)-based network in both stages. The first stage generates an initial coarse face image without an occlusion mask. The second stage refines the result from the first stage by forcing it closer to real face images or ground truth. To increase the performance and minimize the artifacts in the generated result, a new refine loss (e.g., reconstruction loss, perceptual loss, and adversarial loss) is used to determine all differences between the generated de-occluded face image and ground truth. Furthermore, we build occluded face images and corresponding occlusion-free face images dataset. We trained our model on this new dataset and later tested it on real-world face images. The experiment results (qualitative and quantitative) and the comparative study confirm the robustness and effectiveness of the proposed work in removing challenging occlusion masks with various structures, sizes, shapes, types, and positions.
Abdul Jabbar bin Ismail,Nor Diyanah Ahmad,Chong Si Ching,Cheah Siew Lean,Tony Tan Beng Keong,Mohd Izzwan Zaini,Cheah Phee Kheng 대한이식학회 2023 Korean Journal of Transplantation Vol.37 No.2
Background: Improving organ donation rates requires better detection of possible organ donors, which in turn necessitates identifying barriers preventing the identification of possible organ donors. The objectives of this study were to determine the actual rate of possible deceased organ donors among nonreferred cases and to identify barriers to their identification as possible donors. Methods: This retrospective observational study used 6 months of data collected from two intensive care units (ICUs). Possible organ donors were defined as patients with a Glasgow Coma Scale score <5 and evidence of severe neurological damage. Barriers that led to the nonidentification of these patients as possible organ donors were also identified. Results: Fifty-six of 819 patients admitted to the ICUs during the study period were detected as possible organ donors, representing a 6.83% possible organ donor detection rate. Nonclinical barriers to the identification of possible organ donors were found to be more significant than clinical barriers (55% vs. 45%, respectively). The most significant nonclinical barrier was an unknown reason, despite patients being medically suitable for deceased organ donation and fulfilling the criteria for possible organ donor classification. Unresolved sepsis was the main clinical barrier. Conclusions: The significant rate of unreferred possible deceased organ donors found in this study reveals the need to increase awareness and knowledge among clinicians of the proper detection of possible donors at an early stage to avoid the loss of possible deceased organ donors, and thereby increase the deceased organ donation rate in Malaysian hospitals.
Abdul Jabbar Shah,Anwarul-Hassan Gilani,Kanza Abbas,Munawwer Rasheed,Amir Ahmed,Viqar Uddin Ahmad 대한약학회 2011 Archives of Pharmacal Research Vol.34 No.8
This study describes the chemical composition of the essential oil of Artemisia maritima (Am.Oil) and the pharmacological basis for its medicinal use in gut and airways disorders. Twenty five compounds, composing 93.7% of the oil, were identified; among these, chrysanthenyl propionate and elixene were identified for the first time from any Artemisia species. The Am.Oil (0.3-1.0 mg/mL) suppressed spontaneous and high K^+ (80 mM)-induced contractions in isolated rabbit jejunum, suggestive of an antispasmodic effect mediated possibly through calcium channel blockade. The calcium channel blockade activity was confirmed when pre-treatment of the tissue with Am.Oil (0.01-0.03 mg/mL) shifted the Ca^++ concentration-response curves to the right, similar to verapamil and papaverine. In isolated tracheal strips, Am.Oil inhibited carbachol (CCh; 1 μM)-induced contractions more than that induced by K^+ and shifted the isoprenaline-induced inhibitory CRCs to the left, similar to papaverine, suggestive of potentiation, while, verapamil was more potent against K^+ than CCh-induced contractions and had no potentiating effect on isoprenaline-induced inhibitory CRCs. These data indicate that the Am.Oil exhibited spasmolytic and bronchodilator activities mediated possibly through dual blockade of calcium channels and phosphodiesterase, which provides the pharmacological basis to the medicinal use of Artemisia maritima in colic, diarrhea and possibly asthma.
ON COMMUTATIVITY OF NILPOTENT ELEMENTS AT ZERO
Abdul-Jabbar, Abdullah M.,Ahmed, Chenar Abdul Kareem,Kwak, Tai Keun,Lee, Yang Korean Mathematical Society 2017 대한수학회논문집 Vol.32 No.4
The reversible property of rings was initially introduced by Habeb and plays a role in noncommutative ring theory. In this note we study the reversible ring property on nilpotent elements, introducing the concept of commutativity of nilpotent elements at zero (simply, a CNZ ring) as a generalization of reversible rings. We first find the CNZ property of 2 by 2 full matrix rings over fields, which provides a basis for studying the structure of CNZ rings. We next observe various kinds of CNZ rings including ordinary ring extensions.