http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
- 中文 을 입력하시려면 zhongwen을 입력하시고 space를누르시면됩니다.
- 北京 을 입력하시려면 beijing을 입력하시고 space를 누르시면 됩니다.
RISS 인기검색어
- 검색키워드
- 저자 : Ahsan Ahmad (검색결과 6 건)
- 무료
- 기관 내 무료
- 유료
-
Effect of Light and Feed Restriction During Rearing on Production Performance of Egg Strain Layers
Ahsan-ul-haq, Ahsan-ul-haq,Ahmad, Nazir,Rasool, Shahid,Shah, T.H. Asian Australasian Association of Animal Productio 1997 Animal Bioscience Vol.10 No.6
432 Babcock ISA white leghorn pullets reared for 8 weeks on a standard managemental conditions were exposed to feed/nutrient and light restrictions from 9 to 20 weeks of age. Four feeding regimes i. e. 100, 85 or 70 percent of the recommended allowance and low energy (2,500 Kcal/kg) low protein (13% CP) ration were fed each in the three light regimes i. e. (A) Natural day light starting from 13.24 hr/day at 8 weeks of age and ending 10.41 hr/day at the end of 20 weeks; (B) Constant 11 hr/day light and (C) starting with 13 hr/day at 8 weeks and decreasing @ 20 min/week till 20 weeks of age. At the age of 20 weeks all the birds were shifted to separate cages under uniform lighting feeding and management. During the 21st week light was increased to 12 hr a day and thereafter with an increase of 30 min per week, increased to 16 hr a day at the age of 29 weeks. From 20 weeks onward till 72 week age, all the birds were offered commercial layer rations ad libitum, prepared according to climatic conditions. The results of the study revealed that birds reared under natural and constant light had higher weights than decreasing light, yet they could not out perform during production period. The effect of feed and nutrient restriction, on the other hand, was found significant during rearing as well as production period. The birds exposed to higher level of feed and those exposed to nutrient restriction were lighter in weight. The 100% fed birds laid their first egg at an early age. However, those reared on 85% of the recommendation excelled all other groups in terms of produced number of eggs, egg mass, hen housed and hen day production and net returns.
-
Lipoxygenase Inhibitory Constituents from Indigofera oblongifolia
Ahsan Sharif,Ejaz Ahmed,Abdul Malik,Naheed Riaz,Nighat Afza,Sarfraz Ahmad Nawaz,Muhammad Arshad,Muhammad Raza Shah,Muhammad Iqbal Choudhary 대한약학회 2005 Archives of Pharmacal Research Vol.28 No.7
Indigin, alkylated xanthene (1) and indigoferic acid (2) have been isolated from the chloroform soluble fraction of Indigofera oblongifolia, along with β-sitosterol (3) and 3-hydroxybenzoic acid (4), which are reported for the first time from this species. Their structures were determined through spectroscopic techniques. Both the new compounds 1 and 2 showed significant activity against enzyme lipoxygenase, while 2 further showed moderate inhibition against BChE.
-
System Identification of an Airship using Trust Region Reflective Least Squares Algorithm
Mansoor Ahsan,Mohammad Ahmad Choudhry 제어·로봇·시스템학회 2017 International Journal of Control, Automation, and Vol.15 No.3
Lighter than air vehicles present feasible solutions to several problems in aviation industry. Dynamicmodeling of airships, however, poses enhanced complexities due to the effects of buoyancy-based static lift and virtualmass and inertia. System identification is an established technique for modeling aerial vehicles, but it generallyrequires huge amount of flight data, acquired through costly sensors operating at high sampling rates. Earlier airshipidentification works have used output/filter error methods, evolution strategies and subspace identification methods;all using large sets of estimation data. In this research, the longitudinal dynamics of a 30 ft long unmanned airshiphave been modeled using very less estimation data. During airship’s flight experiment, flight data was recorded at aminimal sampling frequency of 8 Hz, using low-cost sensors. The less estimation data was compensated by iterativeestimation technique, instead of one-step estimation. The flight data was subjected to trust region reflective leastsquares algorithm that is based on a relatively new and efficient optimization method. The model estimation qualitywas quantified by residual analysis and Akaike’s criterion of final prediction error. The promising cross-validationresults show that the adopted identification approach is suitable and cost-effective for modeling of complex airshipdynamics.
-
Lipoxygenase Inhibitory Constituents from Indigofera oblongifolia
Sharif, Ahsan,Ahmed, Ejaz,Malik, Abdul,Riaz, Naheed,Afza, Nighat,Nawaz, Sarfraz Ahmad,Arshad, Muhammad,Shah, Muhammad Raza,Chaudhary, Muhammad Iqbal The Pharmaceutical Society of Korea 2005 Archives of Pharmacal Research Vol.28 No.7
Indigin, alkylated xanthene (1) and indigoferic acid (2) have been isolated from the chloroform soluble fraction of Indigofera oblongifolia, along with $\beta$-sitosterol (3) and 3-hydroxybenzoic acid (4), which are reported for the first time from this species. Their structures were determined through spectroscopic techniques. Both the new compounds 1 and 2 showed significant activity against enzyme lipoxygenase, while 2 further showed moderate inhibition against BChE.
-
Optimization of Flame Retardancy & Mechanical Performance of Jute-glass/Epoxy Hybrid Composites
Muhammad Umair,Ayesha Shahbaz,Ahsan Ahmad,Sohaib Arif,Khubab Shaker,Madeha Jabbar,Yasir Nawab 한국섬유공학회 2022 Fibers and polymers Vol.23 No.10
One of the limiting factors of natural fiber composites is their lower flame retardancy (FR) and mechanicalstrength as compared to the glass and other synthetic fiber composites. In this research, FR and mechanical properties of thehybrid jute-glass/epoxy composites were optimized. In the first part, different percentages (1 %, 2 % & 3 %) of zirconiumphosphate (ZrP) particles were mixed in epoxy resin to optimize the flame retardancy and mechanical properties of jute/epoxy composites. 3 % ZrP loaded composite showed improved FR and mechanical (tensile and impact) properties followedby 2 % and 1 % respectively. In the second part, optimized percentage of ZrP particles (3 %) was used to fabricate two (02)jute-glass hybrid epoxy composites, and their mechanical (tensile, flexural and impact) and FR properties were evaluated. Hybrid (H1) samples showed better mechanical and FR properties due to presence of glass layer on the outer side ofcomposite with 3 % ZrP particles loading.
-
Amjid Ahad,Mohd. Mujeeb,Haseeb Ahsan,Waseem Ahmad Siddiqui 한국통합생물학회 2016 Animal cells and systems Vol.20 No.4
Diabetic nephropathy (DN) is the leading cause of death in diabetic patients and the current treatment options available have a limited significance. The insect galls of Quercus infectoria are traditionally important in the treatment of numerous diseases including diabetes. Hence, the present study was undertaken to evaluate the effect of Q. infectoria gall extract (QIGE) against experimental DN. Type 2 diabetes was induced by feeding rats with a high-fat diet (HFD) initially for 5 weeks, followed by a single intraperitoneal injection of streptozotocin (STZ, 35 mg/kg bw/ day). QIGE was administered to the rats orally at doses of 100 and 200 mg/kg bw/day, respectively. At the end of the experimental period, various glycemic and renal function parameters were evaluated in the serum, urine and kidney tissues. The QIGE treatment significantly (p < .001) reduced the levels of fasting blood glucose, serum lipid profile, glycated hemoglobin (HbA1c) and homeostasis assessment of insulin resistance in treated rats as compared to diabetic control rats. Markers of oxidative stress and the expression of transforming growth factor-β (TGF-β) in the kidneys of diabetic rats were significantly (p < .001) normalized by QIGE administration. QIGE prevents the development of DN via the inhibition of hyperglycemiainduced oxidative stress and renal TGF-β expression and is, therefore, a potential therapeutic agent in the treatment of diabetic complications, especially DN.
연관 검색어 추천
이 검색어로 많이 본 자료
활용도 높은 자료
