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Home > Biological Study of Some Secondary Metabolites Isolated from Mangifera Indica and Azadirachta Indica and Their Derivatization

Biological Study of Some Secondary Metabolites Isolated from Mangifera Indica and Azadirachta Indica and Their Derivatization

Thesis Info

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Author

Kanwal, Qudsia

Program

PhD

Institute

University of the Punjab

City

Lahore

Province

Punjab

Country

Pakistan

Thesis Completing Year

2011

Thesis Completion Status

Completed

Subject

Chemistry

Language

English

Link

http://prr.hec.gov.pk/jspui/handle/123456789/2213

Added

2021-02-17 19:49:13

Modified

2024-03-24 20:25:49

ARI ID

1676725629651

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The wide-ranging medicinal uses attributed to genus Mangifera indica and Azarirachta indica led to carry out bioassay guided phytochemical studies. Leaves of M. indica and A. indica were ground and extracted with methanol. After solvent evaporation, a dark green residue was obtained. It was dissolved in water and successively partitioned with n-hexane, CHCl3, EtOAc and butanol. All the fractions except n-hexane showed remarkable inhibitory activities of both exo and endoglucanase, the chloroform and butanol fractions also showed significant herbicidal potential. Repeated chromatographic resolution of all these fractions and sub-fractions M. indica and only butanol fraction of A.indica using silica gel column and subsequent elution of different combination of solvent systems resulted the isolation of thirteen compounds from Mangifera indica and seven compounds from Azadirachta indica, which includ four new compounds 1, 2, 4, and 18. along with the compounds 1,2,3,4,5,6,7,9,10,11 and 14, 16, 17 reported for the first time from M. indica and A.indica respectively. The compounds 8, 12, 13 and 15, 19, 20 were already reported from A. indica and M.indica respectively. All the compounds were tested against cellulases (both exo and endoglucanase) enzymes of Melanoplus sanguinipes (a worldwide problematic insect), compounds 2,3,4,5,6,9,10 and 11 for their herbicidal potential against Parthenium hysterophorus(a worldwide notorious weed) and 2,3,4,5 10and 11 for their antimicrobial activity against five fungal (Macrophamina phaseolena, alternaria alternaria, Penicilium citrii, Aspergillous fumigatous and Aspergillous niger) and four bacterial strains (Lactobacillus sp., Escherichiacoli, Azospirillium lipoferum and Bacillus sp.). The results of the present study indicate that the medicinal plants M.indica and A.indica possess substantial pesticidal, herbicidal, antifungal and antibacterial properties. Especially the pesticidal and herbicidal constituents of M. indica leaves can be exploited for the management of Melanoplus sanguinipes and Parthenium hysterophorus L. The compound 10 exhibited significant inhibition of both enzymes and the growth of parthenium to a large extent.Structure of this compound can be used as an analogue for the preparation of a nature friendly biopesticides and herbicides for the control of one of the most destructive pest Melanoplus sanguinipes and most noxious weed Parthenium hysterophorus to protect the major cash crops of Pakistan.
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ملن دی آس

ملن دی آس
چھیتی چھیتی آ وے ماہی تیری یاد ستاندی اے
دن گزرے تیری یاد چ، راتیں نیند ناں آندی اے

فجری ویلے باگاں دے وچ چڑیاں بولدیاں
چھنے دیواں پیر دے جے خبراں آون ڈھول دیاں
ہجر فراق تیرے وچ اکھاں اتھروں ڈوہل دیاں
دلڑی تیری یاد چ پئی روندی کرلاندی اے
چھیتی چھیتی آ وے ماہی تیری یاد ستاندی اے

دیس پرائے ٹر گیا ماہی دیوے کون دلاسے
مدتاں ہویاں ویکھن کارن ہو گئے نین پیاسے
وقت بدلدا دیر ناں لاوے تولیوں ہوندا ماسے
سسی سیج پنل تے ستی فجری اٹھ پچھتاندی اے
چھیتی چھیتی آ وے ماہی تیری یاد ستاندی اے

اجڑیاں گلیاں سنج چوبارے ویہڑا کھاون آوے
ول ول ویکھاں راہ سجن دا اوہ نہ مکھ وکھاوے
کی کراں میں کدھر جاواں کوئی پیش نہ جاوے
سک پیا دے ملنے والی ہر دم پئی ستاندی اے
چھیتی چھیتی آ وے ماہی تیری یاد ستاندی اے

جہلم دے کنڈے دے اُتے دلبر نوں سد ماراں وے
اوکھے ویلے ماہی باہجھوں کون لوے گا ساراں وے
یار ملے تاں خوشیاں تھیون جاون دکھ ہزاراں وے
باگاں وچ بہار حسن دی جیویں دل بہلاندی اے
چھیتی چھیتی آ وے ماہی تیری یاد ستاندی اے

قادریؔ سائیں سانوں ایتھے یار دی یاد ستاوے
دل وچ بھانبھڑ جیہڑا اوہنوں کون بجھاوے
آوے شالا چھیتی چھیتی ماہی مکھ وکھاوے
ماہی دا مکھ تکیاں ساڈی عید سعید ہو جاندی اے
چھیتی چھیتی آ وے ماہی تیری یاد ستاندی اے

اسلامی بینکوں میں رائج مضاربت: اصول و تطبیق، دور حاضر کے تناظر میں

Islām is said to be a complete code of conduct. It guides the humanity in every aspect of life. To earn the best living is the aim of every man, for which he earnestly spends his most precious time and energies. In the present era, the economic activities are in close correspondence with the banking system. But, it is a matter of fact that the conventional banking system was not founded on Islamic economic principles, nor does it follow them in the conduct of its affairs. The question arises, are Islām and its academic sources capable to guide us to substitute the conventional banking system. We find that Muḍārabah in an Islamic economic system is an instrument that emanates a number of substitutions to replace the conventional banking. This article discusses Muḍārabah, only. Muḍārabah is a mode of Islamic financing in which one party provides capital and second one employs its expertise to do a business. In the classical Muḍārabah, there were only two parties. One of them is called Rabb al-Māl (Financer) and second Muḍārib (Worker). It was the simplest form of the classical Muḍārabah, but with the passage of time, Muḍārabah evolved into many forms. Now, it has become more complex. The Islamic banks employ Muḍārabah. They are using modern forms of Muḍārabah in their products. People have several misconceptions about Muḍārabah for lack of knowledge about it and its the procedures. This article is an effort to explain the legitimacy of Muḍārabah and its method according to al-Sharī‘ah in the context of the modern Muḍārabah banking.

Impact of Stressors on Employee Performance: Moderating Role of Big Five Traits

The nature of jobs, across the globe, is becoming more complex and demanding since last few decades. Today, the technological innovations, growing competition, and pressure of performance at the workplace are inducing the organizations to take necessary steps to make their workforce more productive. Scholars suggest that organizations under such circumstances exert pressure to perform better that results in negative consequences for both the organizations and the individuals. The purpose of the current study was to examine the effects of two important workplace stressors such as time pressure and workload on desirable job behaviors (i.e. in-role job performance, OCB and creative performance). The study also examined the effects of big five personality traits (Emotional Stability, Extraversion, Agreeableness, Conscientiousness, and Openness to Experience) on these job outcomes. In addition, the study examined the role of personality traits as buffering agents against the harmful effects of workplace stressors on these job outcomes. Data was collected from 230 full time employees working in different organizations in Pakistan in two stages whereby data on independent and moderating variables were collected in Time 1 and data on dependent variables were collected in one month later in Time 2. The results revealed that time pressure had a negative effect on job performance and OCB. Workload was found to have no significant effect on job performance, OCB, and creative performance. The results suggested that conscientious individuals were less likely to demonstrate creative performance. The findings also suggested that extravert and conscientious individuals were less likely to demonstrate citizenship behaviors at the workplace. Further, agreeableness and openness to experience had a positive effect on both OCB and creative performance. The results for moderation suggested that time pressure had a significant negative effect on job performance for high conscientiousness. Similarly, time pressure had a significant negative effect on job performance for low extraversion. The findings also revealed that the negative 2 relationship between time pressure-OCB was stronger when extraversion was high. In addition, time pressures had a significant negative relationship with OCB for low agreeableness. Further, the negative relationship between time pressure and creative performance was significant for those low on agreeableness The results further demonstrated that the workload-OCB relationship was positive when emotional stability was low whereas this relationship was negative when extraversion was high. Findings also suggest that the workload-OCB relationship was positive when extraversion was high whereas this relationship was negative when extraversion was low. Moreover, the workload-OCB relationship was positive when agreeableness was high whereas this relationship was negative when agreeableness was low. Furthermore, workload had a negative relationship with creative performance for high extraversion. Finally, workload had a negative effect on creative performance for low agreeableness.