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 : Mirjalili, Ali Mohammad (검색결과 34 건)
- 무료
- 기관 내 무료
- 유료
-
-
-
Acetalization of Carbonyl Compounds by Using Silica-bound Sulfuric Acid under Green Condition
Mirjalili, Bi Bi Fatemeh,Zolfigol, Mohammad Ali,Bamoniri, Abdolhamid,Hazar, Azizeh Korean Chemical Society 2004 Bulletin of the Korean Chemical Society Vol.25 No.6
Aldehydes and ketones were converted to their corresponding acetals in the presence of silica-bound sulfuric acid in n-hexane under mild and heterogeneous conditions with excellent yields.
-
Mirjalili S. A.,Sharzehee M. The Korean Fiber Society 2005 Fibers and polymers Vol.6 No.2
The paper reports the physical and mechanical properties of hand-woven carpets, which have been put under static force. Two groups of wool fibres, from two parts of Iran, were prepared to spin pile yams for the carpets. Each group of the fibres included both conventional and tanned wool. Then two yam counts, $N_m$ = 4/2 and 6/2, were spun for two different knot densities. After weaving the carpets, they were put under static force and their thickness variations were measured and plotted against time, in logarithm scale. The resiliency of the carpets piles after eliminating the static force, were measured and plotted against time, in logarithm scale, too. The results were compared to each other and analysed with respect to parameters such as the type and quality of the wool fibres as well as knot density of the carpets.
-
-
-
Effect of stirring time on synthesis of ultra fine α-Al2O3 powder by a simple sol-gel method
F. Mirjalili,Luqman Chuah,Hasmaliza Mohamad 한양대학교 세라믹연구소 2011 Journal of Ceramic Processing Research Vol.12 No.6
The present paper tends to explore the effect of stirring time on the synthesis of nano α-Al2O3 particles. In this study, alumina nanoparticles were synthesized through an alkoxide route implementing sol-gel method in which aqueous solutions of aluminum isopropoxide and 0.5M aluminum nitrate nanohydrate were used to prepare an alumina sol. Sodium dodecylbenzen sulfonate was used as the surfactant stabilizing agent. The prepared solution was stirred for different times (24, 36, 48 and 60 hours)at 60 oC. The samples were, then, characterized by Brunauer-Emmet-Teller method, X-ray diffraction, thermogravimetry analysis,differential scanning calorimetry, Fourier transform infrared spectrometry , scanning electron microscopy and transmission electron microscopy. The introduction of different stirring times affected the particle size and shape and the degree of aggregation. By increasing the stirring time (starting from 24 to 48 hours), the particle size decreased, but there was a harder agglomeration for the samples with 60 hours stirring time. The finest particle size (20-30 nm) was obtained at 48 hours stirring time.
-
BiBi Fathemeh, Mirjalili,Mohammad Ali, Zolfigol,Abdolhamid, Bamoniri Korean Chemical Society 2001 대한화학회지 Vol.45 No.6
클로로술폰산을 실리카겔과 반응시키면 실리카겔 표면에 황산이 공유결합으로 고정된 실리카황산을 얻게 된다. 무용매 조건하에서 마이크로웨이브를 쪼여주면서 실리카 황산과 젖은 $SiO_2$를 함께 사용하게 되면 아세탈을 화합물로 변화시키는 효과적인 탈아세탈 시약으로 사용할 수 있다. Neat chlorosulfonic acid reacts with silica gel to give silica sulfuric acid in which sulfuric acid is immobilized on the surface of silica gel via covalent bond. A combination of silica sulfuric acid and wet SiO$_2$ was used as an effective deacetalizating agent for the conversion of acetals to their corresponding carbonyl derivatives by using microwave irradiation under solvent free conditions.
-
-
연관 검색어 추천
이 검색어로 많이 본 자료
활용도 높은 자료
