Search or add a thesis

Advanced Search (Beta)
Home > Phytochemistry and Bioactivity of Selected High Altitude Plants Belonging to Ligularia, Senecio and Vernonia Genera

Phytochemistry and Bioactivity of Selected High Altitude Plants Belonging to Ligularia, Senecio and Vernonia Genera

Thesis Info

Access Option

External Link

Author

Hussain, Syed Hamid

Program

PhD

Institute

University of Peshawar

City

Peshawar

Province

KPK

Country

Pakistan

Thesis Completing Year

2012

Thesis Completion Status

Completed

Subject

Chemistry

Language

English

Link

http://prr.hec.gov.pk/jspui/handle/123456789/507

Added

2021-02-17 19:49:13

Modified

2024-03-24 20:25:49

ARI ID

1676726939970

Asian Research Index Whatsapp Chanel
Asian Research Index Whatsapp Chanel

Join our Whatsapp Channel to get regular updates.

Similar


The research work included in the present dissertation is mainly focused on isolation and structure elucidation of pure chemical constituents from the selected high altitude plants belong to Ligularia, Senecio and Vernonia genera. Moreover, biological activities have also been incorporated for various crude fractions and the purified compounds. There are three main parts of the dissertation: Part-A: Phytochemistry and bioactivities of Ligularia thomsonii Part-B: Phytochemistry and bioactivities of Senecio desfontainei and Senecio chrysanthemoides Part-C: Phytochemistry and bioactivities of Vernonia anthelmintica Part-A Part A describes the phytochemical investigation and bioactivities of L. thomsonii (Compositae). Three new (32-34) along with nine known (35-43) compounds were isolated from the plant. Various spectroscopic techniques were used to characterize their structures. Compounds (32-36 and 39-43) were also evaluated for their radical scavenging activities in the diphenylpicrylhydrazyl (DPPH) assay using ascorbic acid as standard. Part-B Part B deals with the phytochemistry and bioactivities of S. desfontainei and S. chrysanthemoides (Compositae). One new (44) and eleven known compounds (45-55) were isolated from S. desfontainei while six known compounds (56-61) obtained from S. chrysanthemoides. Physical characteristics and extensive spectroscopic studies were used for characterization of the isolated and purified compounds which were also evaluated for their antioxidant activities. Part-C Part C of the dissertation, describing the phytochemistry and bioactivities of V. anthelmintica (Compositae). Eleven new compounds (62-72) were isolated and their structures have been characterized by physical characteristics and advanced spectroscopic techniques.
Loading...
Loading...

Similar Books

Loading...

Similar Chapters

Loading...

Similar News

Loading...

Similar Articles

Loading...

Similar Article Headings

Loading...

سر رابرٹ ہڈسن

سرہڈسن کی وفات
گزشتہ دسمبر کا ایک اہم معاشرتی حادثہ سر رابرٹ ارنڈیل ہڈسن کی وفات ہے، سر ہڈسن انجمن صلیب احمر انگلستان کے صدر تھے اور انھوں نے انجمن کی ترقی و توسیع میں بہت کچھ حصہ لیا تھا اور اپنی بااثر شخصیت کی بناء پر اس انجمن کے لیے ایک کروڑ نوے لاکھ پونڈ جمع کئے تھے۔
کیا ہندوستان کی تمام انجمنوں کی متحدہ آمدنی بھی کبھی اس کے برابر ہوگی جس غریب ملک میں صحیح و تندرست لوگ بھوکے مرتے ہوں وہاں مریضوں کو کون پوچھتا ہے۔
(نجیب اشرف ندوی، مارچ ۱۹۲۸ء)

 

Islam and Woman in the Contemporary Arab World: An Interpretation of Rajaa Al-Sanea’s Girls of Riyadh from Islamic Feminist Perspective

The present position paper explores to examine Rajaa al-Sanea’s“Girls of Riyadh” (2005) from the Islamic feminist perspective. Also, the study highlights the model of western feminism epitomised in the narrative under reference, vis-à-vis the Islamic concept of feminism. Islamic feminism grants equal rights to women and ensures its implementation in the Islamic state and society, whereas Western-sponsored feminism dwells on the archetype of women’s liberalism. That, in turn, leads to an anarchic and chaotic society, because of its believing in bringing women not only equal to men but superseding them in socio-cultural positioning. In the existing situation, the novel decries phallocentric society of Saudi Arabia and aiming at replacing it by the sensate-secular feminism that believes in the undue autonomy of the women. In order to investigate the presence of overwhelming patrilineal mores, the study pursues Islamic feminism as a theoretical model and employs reader’s response technique as a methodology. More far the findings of the research are concerned, the researchers conclude that replacing the patriarchal autonomy in the said society by Islamic feminism is befitting and benefitting than to replace it by the western feminism.

Organic and Inorganic N-Fertilizer Management for Rice under Rice-Wheat Cropping System

Nitrogen (N) is the most important crop nutrient for improving crop productivity in rice-wheat cropping system. The continuous use of chemical fertilizer would lead gradual to decline of organic matter content and native N status in the soil, and decrease productivity in rice-wheat system. Alternatives have to be found out to improve the productive capacity of rice soils. Therefore, the present research was designed to investigate the application effect of six different organic N sources (OS) applied alone and in various combinations (75: 25, 50: 50 and 25: 75 %) with urea (U) on rice hybrid (Oryza sativa L., cv. Pukhraj), and their residual effects on the yield and yield components of subsequent wheat (Triticum aestivum L., cv. Siren). The field experiment was carried out on farmer’s field at Butkhela (Malakand) during 2011-13. The results revealed that the rest (N applied plots) showed better growth, higher yield and profitability than control (N not applied) in both crops. The inorganic N fertilizer (urea) was more beneficial in terms of better growth, yield, yield components, and profitability in case of current rice crop but had the less residual soil residual N after rice harvest that showed negative impact on the yield, yield components and profitability of subsequent wheat crop when compared with OS. Among the six OS used [three each from animal manures (AM) and three crop residues (CR)], poultry manure (PM) improved growth, yield components, biological (16331 kg ha-1) and grain yields (8459 kg ha-1), rice grains N contents (22%), soil N content (726 mg kg-1) after rice harvest, and had the highest profitability (192,000 PKR) than other OS. Results revealed that application of wheat straw resulted in the lowest biological (13020 and 7916 kg ha-1) and grain yields (6200 and 3219 kg ha-1) in both crops respectively and also had the less profitability (28,000 and 39,000 PKR) under rice-wheat system. Among the three ratios used, applying the required N (120 kg N ha-1) at the rate of 50% each from urea and OS (50:50) improved growth, biological (19415 and 8298 kg ha-1) and grain yields (9417 and 3451 kg ha-1 ) of rice and wheat, respectively, and also had the highest profitability (328,000 PKR) under rice-wheat cropping system. In both years, the yield and yield componetns, and profiatibility was higher while using mixtures of urea + AM than Urea + CR. The combine application of U + PM had the most positive, while, U + WR showed the most neagtive impact on yield and profitability under rice-wheat system. Increase in yield and yield components of the subsequent wheat crop was noticed with the increase in residual soil N (sole OS > OS + urea > sole urea > control). It can be concluded from the present findings that combined application of organic sources with urea not only improved growth, yield and yield components and profitability of the current rice crop; but their residual effects also increased yield, yield components and profitability of the subsequent wheat crop. It was therefore, suggested that application of organic sources in combination with urea (50:50) could increase the productivity, soil fertility and profitability under rice-wheat cropping system on sustainable basis.