Tetranortriterpenoids from Azadirachta indica

Ragasa, Consolacion Y.; Nacpil, Zenaida D.; Natividad, Gaudencio M.; Tada, Masaru; Coll, John C.; Rideout, John A.

doi:10.1016/s0031-9422(97)87092-6

Cited by 38 publications

(34 citation statements)

References 14 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Most of the parts such as leaves, bark, flower, fruit, seed and root have applications in the field of medicine. Neem seed, which has higher concentration of oil (30% oil content) is the major source of Neem oil, which is already in commercial use as an insecticide, lubricant and in medicine to treat various kinds of diseases (Puri, 1999, Ragasa et al, 1997Barnwal et al, 2005;Johnson et al, 1996).…”

Section: Introductionmentioning

confidence: 99%

Synthesis of biodiesel from Neem oil using sulfated zirconia via tranesterification

Muthu¹,

Sathyaselvabala²,

Varathachary³

et al. 2010

Braz. J. Chem. Eng.

115

View full text Add to dashboard Cite

-Sulfated zirconia (SZ) is a widely used catalyst, which is synthesized by a solvent free method and the synthesized catalyst has been characterized. Neem Methyl Ester (Biodiesel) was prepared by a two-step process of esterification and transesterification from Neem oil with methanol in the presence of catalyst. Acid catalyst was used for the esterification and alkali catalyst (KOH) for the transesterification reaction. Optimal Free Fatty Acid (FFA) conversion was achieved using 1 wt% SZ as an acid catalyst with a methanol-to-oil molar ratio of 9:1, temperature of 65°C and reaction time of 2 h. The acid value was reduced to 94% of the raw oil (24.76 mg KOH/g), which confirmed the conversion. Consequently, this pretreatment reduces the overall complexity of the process and a conversion efficiency of 95% is achieved when pretreated oil reacts with methanol in the presence of KOH.

show abstract

Section: Introductionmentioning

confidence: 99%

Synthesis of biodiesel from Neem oil using sulfated zirconia via tranesterification

Muthu¹,

Sathyaselvabala²,

Varathachary³

et al. 2010

Braz. J. Chem. Eng.

115

View full text Add to dashboard Cite

show abstract

“…It was identified by mass spectrometry and by comparison of 1 H-and 13 C-NMR data to the previously reported compound 10) as stigmast-4-ene-3,6-dione. However, the 13 C-NMR-APT spectrum clearly proved that the carbon assignments 10) at C-8, C-10 and C-12 should be revised (cf. Table 2).…”

Section: Resultsmentioning

confidence: 99%

“…It has been reported that a mixture of stigmasterol and bsitosterol 12) or stigmasterol only 13) reduced the number of micronucleated polychromatic erythrocytes induced by mitomycin C in the micronucleus test. b-Sitosterol (5) is known to inhibit the mutagenicity of N-methyl-N-nitrosourea 14) or tetracycline.…”

Section: Fig 2 Chemical Structures Of the Isolated Components From mentioning

confidence: 99%

Antimutagenic Constituents from the Thorns of Gleditsia sinensis

et al. 2005

View full text Add to dashboard Cite

“…(Kavathekar, 2003). Many other compounds are present in smaller quantities in neem seeds (Hallur et al, 2002;Kumar et al 1996aKumar et al , 1996bRagasa et al, 1997;Siddiqui et al, 1986). Therefore, most products from neem oil are usually represented by their azadirachtin content although they also contain other compounds .…”

Section: Pyrethrins and Azadirachtin Actual Statusmentioning

confidence: 99%