MARC details
| 000 -LEADER |
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| fixed length control field |
03491nam a22002897a 4500 |
| 003 - CONTROL NUMBER IDENTIFIER |
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| control field |
OSt |
| 005 - DATE AND TIME OF LATEST TRANSACTION |
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| control field |
20241113112729.0 |
| 008 - FIXED-LENGTH DATA ELEMENTS--GENERAL INFORMATION |
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| fixed length control field |
241113b |||||||| |||| 00| 0 eng d |
| 040 ## - CATALOGING SOURCE |
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| Original cataloging agency |
TUPM |
| Language of cataloging |
English |
| Transcribing agency |
TUPM |
| Modifying agency |
TUPM |
| Description conventions |
rda |
| 050 ## - LIBRARY OF CONGRESS CALL NUMBER |
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| Classification number |
BTH RB 37 |
| Item number |
M43 2024 |
| 100 ## - MAIN ENTRY--PERSONAL NAME |
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| Personal name |
Medina, Rajie A. |
| Relator term |
author |
| 245 ## - TITLE STATEMENT |
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| Title |
Hydrothermal synthesis of spent coffee grounds carbon dots as photosynthesis enhancer on black behi pechay ( Brassica chinesis L.) / |
| Statement of responsibility, etc. |
Rajie A. Medina, Crizzel Fe M. Dela Cruz, and Antonette G. Ramirez .-- |
| 260 ## - PUBLICATION, DISTRIBUTION, ETC. |
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| Place of publication, distribution, etc. |
Manila: |
| Name of publisher, distributor, etc. |
Technological University of the Philippines, |
| Date of publication, distribution, etc. |
2024. |
| 300 ## - PHYSICAL DESCRIPTION |
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| Extent |
103pages: |
| Dimensions |
29cm. |
| Accompanying material |
+1 CD-ROM (4 3/4in.) |
| 336 ## - CONTENT TYPE |
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| Source |
rdacontent |
| 337 ## - MEDIA TYPE |
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| Source |
rdamedia |
| 338 ## - CARRIER TYPE |
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| Source |
rdacarrier |
| 500 ## - GENERAL NOTE |
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| General note |
Thesis (undergraduate) |
| 502 ## - DISSERTATION NOTE |
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| Dissertation note |
College of Science .-- |
| Degree type |
Bachelor of Applied Science in Laboratory Technology: |
| Name of granting institution |
Technological University of the Philippines, |
| Year degree granted |
2024. |
| 504 ## - BIBLIOGRAPHY, ETC. NOTE |
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| Bibliography, etc. note |
Includes bibliography: |
| 520 ## - SUMMARY, ETC. |
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| Summary, etc. |
The researchers aimed to provide low-cost, environmentally friendly, and long-lasting<br/>ways of producing Carbon Quantum Dots (CQDs) by utilizing hydrothermal synthesis for<br/>the evaluation of their antimicrobial activities and optical properties. The leaf and bark<br/>extract of the mangrove (Rhizophora stylosa Griff.) plant was used in this study to produce<br/>carbon quantum dots using the hydrothermal method, and CQDs were characterized using<br/>UV-vis, FTIR, SEM, EDX, DLS, and an application for the optical property using<br/>Spectrofluorophotometer. The result revealed that the characterization demonstrates the<br/>effective synthesis of CQDs. UV-Vis spectroscopy occurred at wavelengths of 383 nm and<br/>417 nm for the CQD-L and CQD-B series. Fourier Infrared spectroscopy revealed different<br/>peaks, including O-H stretching on Pure-B, Pure-L, CQD-B, and CQD-L, and N-H<br/>stretching on both CQD-B and CQD-L. Scanning Electron Microscopy (SEM) revealed a<br/>homogeneous and scattered appearance, with a smooth texture and an aggregated structure<br/>manifested as spherical-shaped, and also, rough, appearing round, clustered, and<br/>heterogeneous of CQD-L, and CQD-B respectively. Energy Dispersive X-ray<br/>Spectroscopy (EDX), for CQD-L had 56.6% content of carbon, whereas the CQD-B had a<br/>composition of carbon of 38.0%. Dynamic Light Scattering (DLS) hydrodynamic size<br/>yielded 749.7±51.11 d.nm and 542.5±72.48 d.nm, with polydispersity indexes of<br/>0.4290.042 and 0.5560.102, and zeta potentials of -11.20.416 mV and -32.7-1.68Mv of<br/>CQD-L and CQD-B, respectively. Spectrofluorophotometer indicated a blue color for<br/>CQD-B and a red color for CQD-L, which are both parallel to the ultraviolet-visible<br/>spectrum. The phytochemical components connected with the mangrove (Rhizophora<br/>stylosa Griff.) plant have been successfully utilized to create Carbon Quantum Dots<br/>(CQDs). Only pure mangrove bark extract revealed antibacterial activity against S. aureus<br/>in an antimicrobial experiment, with an antimicrobial index (AI) of 0.8, but the remaining<br/>samples showed no antimicrobial action against E. coli, S. aureus, as well as C. albicans.<br/>As a result, for antibacterial tests, the pure bark was vulnerable to gram-positive bacteria.<br/><br/>Keywords: Carbon Quantum Dots (CQDs), Hydrothermal method, Phytochemical<br/>components |
| 650 ## - SUBJECT ADDED ENTRY--TOPICAL TERM |
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| Topical term or geographic name entry element |
Laboratory technology |
| 650 ## - SUBJECT ADDED ENTRY--TOPICAL TERM |
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| Topical term or geographic name entry element |
Agricultural waste materials |
| 700 ## - ADDED ENTRY--PERSONAL NAME |
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| Personal name |
Dela Cruz, Crizzel Fe M. |
| Relator term |
author |
| 700 ## - ADDED ENTRY--PERSONAL NAME |
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| Personal name |
Ramirez, Antonette G. |
| Relator term |
author |
| 942 ## - ADDED ENTRY ELEMENTS (KOHA) |
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| Source of classification or shelving scheme |
Library of Congress Classification |
| Koha item type |
Bachelor's Thesis COS |
| Suppress in OPAC |
No |