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Abdel-Latif, F.F.,Ahmed, E.Kh.,Mekheimer, R.,Mashaly, M.M. The Pharmaceutical Society of Korea 1997 Archives of Pharmacal Research Vol.20 No.5
Several new spiro compounds were synthesized via one-pot ternary condensation of isatin, malononitrile and each of thiobarbituric acid, barbituric, 3-methyl-pyrazolin-5-one, 1-phenyl-3-methyl-pyrazolin-5-one, acetylacetone, benzoylacetone, ethyl acetoacetate, phenacyl cyanide or ethyl-cyanoacetate dimer. Structures and reaction mechanisms were reported and supported via a second synthetic route.
Ahmed, Mustafa Sami,Shah, Nor Shahida Mohd,Al-Aboosi, Yasin Yousif,Gismalla, Mohammed S.M.,Abdullah, Mohammad F.L.,Jawhar, Yasir Amer,Balfaqih, Mohammed Electronics and Telecommunications Research Instit 2021 ETRI Journal Vol.43 No.2
The research domain of underwater communication has garnered much interest among researchers exploring underwater activities. The underwater environment differs from the terrestrial setting. Some of the main challenges in underwater communication are limited bandwidth, low data rate, propagation delay, and high bit error rate (BER). As such, this study assessed the underwater acoustic (UWA) aspect and explored the expression of error performance based on t-distribution noise. Filter orthogonal frequency-division multiplexing refers to a new waveform candidate that has been adopted in UWA, along with turbo and polar codes. The empirical outcomes demonstrated that the noise did not adhere to Gaussian distribution, whereas the simulation results revealed that the filter applied in orthogonal frequency-division multiplexing could significantly suppress out-of-band emission. Additionally, the performance of the turbo code was superior to that of the polar code by 2 dB at BER 10-3.
Ahmed Abu-Zaid,Saeed Baradwan,Ehab Badghish,Rayan AlSghan,Ahmed Ghazi,Bayan Albouq,Khalid Khadawardi,Nora F AlNaim,Latifa F AlNaim,Meshael Fodaneel,Fatimah Shakir Abualsaud,Mohammed Ziad Jamjoom,Abdul 대한산부인과학회 2022 Obstetrics & Gynecology Science Vol.65 No.5
To perform a systematic review and meta-analysis of all randomized controlled trials (RCTs) that evaluated the efficacyand safety of prophylactic tranexamic acid (TXA) versus a control (placebo or no treatment) during hysterectomy forbenign conditions. Six databases were screened from inception to January 23, 2022. Eligible studies were assessed forrisk of bias. Outcomes were summarized as weighted mean differences and risk ratios with 95% confidence intervalsin a random-effects model. Five studies, comprising six arms and 911 patients were included in the study. Two andthree studies had an overall unclear and low risk of bias, respectively. Estimated intraoperative blood loss, requirementfor postoperative blood transfusion, and requirement for intraoperative topical hemostatic agents were significantlyreduced in a prophylactic TXA group when compared with a control group. Moreover, postoperative hemoglobinlevel was significantly higher in the prophylactic TXA group than in the control group. Conversely, the frequencyof self-limiting nausea and vomiting was significantly higher in the prophylactic TXA group than in the control group. There were no significant differences between the groups in terms of surgery duration, hospital stay, and diarrhearate. All the RCTs reported no incidence of major adverse events in either group, such as mortality, thromboembolicevents, visual disturbances, or seizures. There was no publication bias for any outcome, and leave-one-out sensitivityanalyses demonstrated stability of the findings. Among patients who underwent hysterectomy for benign conditions,prophylactic TXA appeared largely safe and correlated with substantial reductions in estimated intraoperative bloodloss and related morbidities.
Shahzad, F.,Abdullah, M.,Chaudhry, A.S.,Bhatti, J.A.,Jabbar, M.A.,Ahmed, F.,Mehmood, T.,Asim, M.,Ahmed, S.,Kamran, Z.,Irshad, I.,Tahir, M.N. Asian Australasian Association of Animal Productio 2016 Animal Bioscience Vol.29 No.3
The study was carried out to explore the effects of replacing wheat straw with fungal treated wheat straw as an ingredient of total mixed ration (TMR) on the growth performance and nutrient digestibility in Nili Ravi buffalo male calves. Fungal treated wheat straw was prepared using Arachniotus sp. Four TMRs were formulated where wheat straw was replaced with 0 (TMR1), 33 (TMR2), 67 (TMR3), and 100% (TMR4) fungal treated wheat straw in TMR. All TMRs were iso-caloric and iso-nitrogenous. The experimental TMRs were randomly assigned to four groups of male calves (n = 6) according to completely randomized design and the experiment continued for four months. The calves fed TMR2 exhibited a significant improve in dry matter intake, average daily weight gain, feed conversion ratio and feed economics compared to other groups. The same group also showed higher digestibility of dry matter, crude protein, neutral-, and acid detergent fibers than those fed on other TMRs. It is concluded that TMR with 33% fungal-treated wheat straw replacement has a potential to give an enhanced growth performance and nutrient digestibility in male Nili Ravi buffalo calves.
Elnemr, Gamal M,El-Rashidy, Ahmed H,Osman, Ahmed H,Issa, Lotfi F,Abbas, Osama A,Al-Zahrani, Abdullah S,El-Seman, Sheriff M,Mohammed, Amrallah A,Hassan, Abdelghani A Asian Pacific Journal of Cancer Prevention 2016 Asian Pacific journal of cancer prevention Vol.17 No.2
Triple-negative breast cancers constitute about 15% of all cases, but despite their higher response to neoadjuvant chemotherapy, the tumors are very aggressive and associated with a poor prognosis as well as a higher risk of early recurrence. This study was retrospectively performed on 101 patients with stage II and III invasive breast cancer who received 6-8 cycles of neo-adjuvant chemotherapy. Out of the total, 23 were in the triple negative breast cancer subgroup. Nuclear Ki-67 expression in both the large cohort group (n=101) and triple negative breast cancer subgroup (n=23) and its relation to the pathological response were evaluated. The purpose of the study was to identify the predictive value of nuclear protein Ki-67 expression among patients with invasive breast cancers, involving the triple negative breast cancer subgroup, treated with neoadjuvant chemotherapy in correlation to the rate of pathological complete response. The proliferation marker Ki-67 expression was highest in the triple negative breast cancer subgroup. No appreciable difference in the rate of Ki-67 expression in triple negative breast cancer subgroup using either a cutoff of 14% or 35%. Triple negative breast cancer subgroup showed lower rates of pathological complete response. Achievement of pathological complete response was significantly correlated with smaller tumor size and higher Ki-67 expression. The majority of triple negative breast cancer cases achieved pathological partial response. The study concluded that Ki-67 is a useful tool to predict chemosensitivity in the setting of neoadjuvant chemotherapy for invasive breast cancer but not for the triple negative breast cancer subgroup.
Nichols, Chelsea,Cruz Espinoza, Ligia Maria,von Kalckreuth, Vera,Aaby, Peter,Ahmed El Tayeb, Muna,Ali, Mohammad,Aseffa, Abraham,Bjerregaard-Andersen, Morten,Breiman, Robert F.,Cosmas, Leonard,Crump, J Oxford University Press 2015 Clinical infectious diseases Vol.61 No.suppl4
<P><B><I>Background.</I></B> The clinical diagnosis of bacterial bloodstream infections (BSIs) in sub-Saharan Africa is routinely confused with malaria due to overlapping symptoms. The Typhoid Surveillance in Africa Program (TSAP) recruited febrile inpatients and outpatients of all ages using identical study procedures and enrollment criteria, thus providing an opportunity to assess disease etiology and pretreatment patterns among children and adults.</P><P><B><I>Methods.</I></B> Inpatients and outpatients of all ages with tympanic or axillary temperatures of ≥38.0 or ≥37.5°C, respectively, and inpatients only reporting fever within the previous 72 hours were eligible for recruitment. All recruited patients had one blood sample drawn and cultured for microorganisms. Data from 11 TSAP surveillance sites in nine different countries were used in the analysis. Bivariate analysis was used to compare frequencies of pretreatment and BSIs in febrile children (<15 years old) and adults (≥15 years old) in each country. Pooled Cochran Mantel–Haenszel odds ratios (ORs) were calculated for overall trends.</P><P><B><I>Results.</I></B> There was no significant difference in the odds of a culture-proven BSI between children and adults among inpatients or outpatients. Among both inpatients and outpatients, children had significantly higher odds of having a contaminated blood culture compared with adults. Using country-pooled data, child outpatients had 66% higher odds of having <I>Salmonella</I> Typhi in their bloodstream than adults (OR, 1.66; 95% confidence interval [CI], 1.01–2.73). Overall, inpatient children had 59% higher odds of pretreatment with analgesics in comparison to inpatient adults (OR, 1.59; 95% CI, 1.28–1.97).</P><P><B><I>Conclusions.</I></B> The proportion of patients with culture-proven BSIs in children compared with adults was similar across the TSAP study population; however, outpatient children were more likely to have <I>Salmonella</I> Typhi infections than outpatient adults. This finding points to the importance of including outpatient facilities in surveillance efforts, particularly for the surveillance of typhoid fever. Strategies to reduce contamination among pediatric blood cultures are needed across the continent to prevent the misdiagnosis of BSI cases in children.</P>
Analysis of thermo-rheologically complex structures with geometrical nonlinearity
Mahmoud, Fatin F.,El-Shafei, Ahmed G.,Attia, Mohamed A. Techno-Press 2013 Structural Engineering and Mechanics, An Int'l Jou Vol.47 No.1
A finite element computational procedure for the accurate analysis of quasistatic thermorheological complex structures response is developed. The geometrical nonlinearity, arising from large displacements and rotations (but small strains), is accounted for by the total Lagrangian description of motion. The Schapery's nonlinear single-integral viscoelastic constitutive model is modified for a time-stress-temperature-dependent behavior. The nonlinear thermo-viscoelastic constitutive equations are incrementalized leading to a recursive relationship and thereby the resulting finite element equations necessitate data storage from the previous time step only, and not the entire deformation history. The Newton-Raphson iterative scheme is employed to obtain a converged solution for the non-linear finite element equations. The developed numerical model is verified with the previously published works and a good agreement with them is found. The applicability of the developed model is demonstrated by analyzing two examples with different thermal/mechanical loading histories.
Anwar, M.S.,Ahmed, F.,Koo, B.H. Elsevier Sequoia 2014 JOURNAL OF ALLOYS AND COMPOUNDS Vol.617 No.-
Polycrystalline La<SUB>0.65-x</SUB>Pr<SUB>x</SUB>Sr<SUB>0.3</SUB>MnO<SUB>3</SUB> (0.0≤x≤0.3) manganite samples were prepared using the conventional solid-state reaction method. The X-ray diffraction result indicates that the all samples have rhombohedral (R-3c) structure without any impurity phase. The field-cooled magnetization M(T) of all samples show the ferromagnetic behavior below Curie temperature (T<SUB>C</SUB>). Also, the saturation magnetization and T<SUB>C</SUB> of the samples decreases and the transition become broader with increasing the Pr concentration. The Arrott plot analysis reveals the second order of ferromagnetic transition at T=T<SUB>C</SUB> for all samples. Magnetic entropy change was evaluated from magnetization isotherms. The magnitude of the isothermal magnetic entropy change is nearly composition independent (1.1+/-0.15Jkg<SUP>-1</SUP>K<SUP>-1</SUP> for ΔH=1T) and relative cooling power lies between 48.85 and 33.10J/kg for 0.0≤x≤0.3. The phenomenon of reversible entropy change and the convenient adjustment of the Curie temperature by Pr doping, make these samples as a possible candidate for magnetic refrigeration at room temperature.