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Regular Semi Generalized Closed Sets in Topological Spaces

Thesis Info

Author

Muhammad Ateeq Tahir

Supervisor

Moiz Ud Din Khan

Department

Department of Mathematics

Program

BS

Institute

COMSATS University Islamabad

Institute Type

Public

City

Islamabad

Province

Islamabad

Country

Pakistan

Thesis Completing Year

2007

Thesis Completion Status

Completed

Subject

Mathematics

Language

English

Added

2021-02-17 19:49:13

Modified

2023-01-06 19:20:37

ARI ID

1676720740330

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ڈاکٹر پال کارس

ڈاکٹر پال کارس

            ان کے چند ہی روز بعد یورپ کے ایک اور نامور فاضل ڈاکٹر پال کارس نے بھی انتقال کیا، ڈاکٹر موصوف کا مولد جرمنی تھا، لیکن مسکن امریکا تھا، وہ مشرقی فلسفہ و مذاہب کے عالم تھے، اور ہندو فلسفہ و مذہب سے انہیں خاص شغف تھا، چنانچہ فلسفہ گوتم بدھ وغیرہ پر ان کی متعدد تصنیفات ہیں، امریکا کا مشہور فلسفیانہ رسالہ موئسٹ انہیں کی ایڈیٹری میں نکلتا تھا۔ ( ’’مولوی عبدالماجد‘‘، جون ۱۹۱۹ء)

 

منو دھرم شاستر اور ہندو نظام میراث

It is said that “Mony makes the mare go ” and it is so because AH’ah Subhdn-au-Taa’la Has willed it so. Wealth is thus, a great blessing and a means of great trial for man at the same time. It is utility and worth-no matter how a man may amass wealth- is restricted to this world alone. A man enters into the world hereafter-empty handedly. All his treasured troves of gold and silver are bequeathed to his loved ones after his demise. Had there been no proper mechanism or a modus-oerandi for the division of this left-over money/inheritance then violence and bloody feuds would have sparked amongst the heirs. Hence we find that almost all religions offer guidelines for the division of ( bequeathed mony or) wealth and valuables left after the death of a person. So is the case of Hindu religion. The purpose of this article is to focus, assess and analyze the Hindu system of inheritance-as to how to disperse the left-over wealth amongst the closest relatives of the decease

Exploitation of Aspergillus and Cladosporium Species for Biologically Active Secondary Metabolites

Aspergillus carbonarius (NRRL–369) and Aspergillus oryzae from Aspergillus genus as well as Cladosporium carrionii and Cladosporium resinae (NRRL–6437) from Cladosporium genus were selected for the present study. Nutrient media were optimized for the growth and production of secondary metabolites. Out of five different media used, A. carbonarius and A. oryzae produced relatively more metabolites in Czapek–dox (Glucose and Starch) broth media (CGSB). Whereas; C. carrionii and C. resinae produced relatively more metabolites in Czapek yeast extracts broth (CYB). To further increase secondary metabolites productivity, two additional chemical compounds (suberoyl anilide hydroxamic acid; SAHA and 5–azacytidine; 5–AZA) were also used as chemical inducers for all fungi except C. carrionii. A dose of 10 μM/100 mL of SAHA resulted in higher secondary metabolites production from Aspergillus species and 15 μM/100 mL of SAHA resulted in higher secondary metabolites production from C. resinae. While a dose 15 μM/100 mL of 5–AZA resulted in higher secondary metabolites production from all the species. Secondary metabolites produced were then studied for its respective biological activities. In antibacterial assay a dose of 500 μg/mL of ethyl acetate extracted from A. carbonarius inhibited the growth of B. subtilis (64.5%), while for antifungal testing a dose of 1000 μg/mL ethyl acetate extract inhibited the linear growth of C. glabrata (58.5%). Whereas, in cytotoxic activities, dose of 1000 μg/mL of ethyl acetate extract showed 94% mortality against brine shrimps, while for phytotoxic activities, a dose 1000 μg/mL showed 90% mortality against Lemna. A dose of 500 μg/mL of ethyl acetate extracted from A. oryzae inhibited the growth of B. subtilis (94%), while for antifungal testing, a dose of 1000 μg/mL of ABSTRACT xxi ethyl acetate extract inhibited the linear growth of M. Canis (84%). Whereas, in cytotoxic activities a dose of 1000 μg/mL of ethyl acetate extract showed 52% mortality against brine shrimps, while for phytotoxic activities, a dose of 1000 μg/mL of ethyl acetate extract showed 67% mortality against Lemna. Furthermore, during the antibacterial assay a dose of 500 μg/mL of ethyl acetate extracted from C. carrionii inhibited the growth of B. subtilis (66%), while for antifungal testing a dose of 1000 μg/mL ethyl acetate extract inhibited the growth of C. albicans (60%). Whereas, in cytotoxic activities a dose of 1000 μg/mL of ethyl acetate extract showed 87% mortality against brine shrimps, while for phytotoxic activities, a dose of 1000 μg/mL ethyl acetate extract showed 80% mortality against Lemna. Finally during the antibacterial assay a dose of 500 μg/mL of ethyl acetate extracted from C. resinae inhibited the growth of S. aureus (81%), while for antifungal testing a dose of 1000 μg/mL of ethyl acetate extract inhibited the growth of A. flavus (15%), while in cytotoxic activities a dose of 1000 μg/mL of ethyl acetate showed 93% mortality against brine shrimps, while for phytotoxic activities, a dose of 1000 μg/mL of ethyl acetate showed 80% mortality against Lemna. The biological activities indicates that, the extracts from A. oryzae and C. carrionii inhibited the growth of experimental organisms with greater extent as compared to A. carbonarius and C. resinae; therefore, A. oryzae and C. carrionii were further selected for the isolation of pure metabolites. A total of three new and four known metabolites were isolated. Two new metabolites were isolated from A. oryzae while one new and four known metabolites were isolated from C. carrionii using preparative High Performance Liquid Chromatography (HPLC) and column chromatography techniques. The structures of all the compounds isolated were ABSTRACT xxii elucidated using (1D and 2D) NMR, IR and HR–MS techniques. The new metabolites were 6–butyl–3–methylene–2–oxotetrahydro–2H–pyran–4–carboxylic acid (A–41), 6–butyl–3–methylene–2–oxo–3,6–dihydro–2H–pyran–4–carboxylic acid (A–42) and (3S,6S)–3–allyl–6–benzylpiperazine–2,5–dione (D–44) whereas, the known metabolites were 5-hydroxy-2-(hydroxymethyl)-4H-pyran-4-one (C–43), 6–(3– methylbut–2–enyl)–1H–indole–3–carboxylic acid (45), 2-(4,6-dihydroxy-3-oxo-1,3- dihydroisobenzofuran-1-yl) acetic acid (46) and 2-(4-hydroxy-1,3- dihydroisobenzofuran-1-yl) acetic acid (47). The two new metabolites (A–41 and B–42) from A. oryzae were selected for the determination of their biosynthetic pathways using [1– 13C] labelled acetate. The [1– 13C] labelled acetate was added to the media on 4th, 5th and 6th days respectively. After the feeding of isotopic [1– 13C] labelled acetate as precursor, the labelled metabolites were isolated using HPLC and the pattern of their incorporation were determined using high field NMR. The basic idea of the present work was to isolate biologically active secondary metabolite(s) from fungi and to produce good quality of antibiotics for the welfare of the society.