Tạp chí Khoa học Tự nhiên Đại học Quốc gia Thành phố Hồ Chí Minh
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The developments of drought in the Cai river basin – Phan Rang, Ninh Thuan province
Tạp chí Khoa học Tự nhiên Đại học Quốc gia Thành phố Hồ Chí Minh - Tập 1 Số T4 - Trang 205-214 - 2017
In Vietnam, the Cai river basin - Phan Rang in Ninh Thuan province is considered to tolerate the most serious drought, which has influenced seriously on the lives and economy of the people in the region. Using Multi-Criteria Analysis method - MCA integrated with GIS for eight factors: evaporation (ETo), rainfall, groundwater, surface water annual flow module, vegetable matter (NDVI), river density...... hiện toàn bộ
#Ninh Thuan #rainfall #drought
Primary and secondary amine material based on crosslinked polystyrene: synthesis and initial application for multiresidue pesticides analysis
Weak anion exchange sorbent based on cross-linked polystyrene with primary secondary amine group was prepared by substitution nucleophilic reaction (SN2) between methylene chloride group and 1,2-ethylene diamine. The effect of factors, namely the weight ratio of amine over methylene chloride, reaction time and temperature on nitrogen percentage were studied using experimental design approach. The ...... hiện toàn bộ
U-Pb zircon and Hf composition of granite Song Ma block
Tạp chí Khoa học Tự nhiên Đại học Quốc gia Thành phố Hồ Chí Minh - Tập 2 Số 4 - Trang 167-175 - 2019
The granite of the Song Ma block mainly consists of two types of granite: biotite granite and hornblende-biotite granite. Biotite granites have the percent of plagioclase (35– 45%), K-feldspar (25–35%), quartz (~20%) and biotite (~10%). Biotite-hornblende granite with the content of plagioclase (40–50%), Kfeldspar (10–15%), hornblende (5–10%) and biotite (5%). Zircon crystals were selected from th...... hiện toàn bộ
Study on the morphological and physiological changes of the peltate glandular trichome development in holy basil (Ocimum sanctum L.) leaf
Tạp chí Khoa học Tự nhiên Đại học Quốc gia Thành phố Hồ Chí Minh - Tập 5 Số 4 - Trang 1633-1641 - 2021
The essential oil is a main product of Holy basil (Ocimum sanctum L.). It present mainly in the peltate glandular trichomes. Therefore, the morphological and physiological changes during the development of peltate glandular trichomes are of great interest. In this paper, the morphological changes of glandular trichomes, the relationship between glandular trichomes and leaf development, and the phy...... hiện toàn bộ
Study on method of filtering noises from electroencephalography signals and its application for identification of several electroencephalography signals
Tạp chí Khoa học Tự nhiên Đại học Quốc gia Thành phố Hồ Chí Minh - Tập 1 Số T4 - Trang 95-104 - 2017
Electroencephalographic (EEG) signals have usually been affected by different types of noise as 50 Hz noise, mechanical noise caused by body movements, heart disturbance, eye noise... In this paper, methods such as: independent component analysis (independent component analysis-ICA), discrete wavelet transform and design of digital filters, were used to filter the noises, to classify the basic com...... hiện toàn bộ
#electroencephalography
Preparation and photo Fenton-like activities of CuO/nanocellulose composite
Tạp chí Khoa học Tự nhiên Đại học Quốc gia Thành phố Hồ Chí Minh - Tập 5 Số 2 - Trang 1055-1067 - 2021
A combination between the nanostructured photocatalyst and cellulose-based materials promotes a new functionality of cellulose towards the development of new bio-hybrid materials for water treatment and renewable energy applications. In this study, nanocellulose (CNC) was synthesized from sugarcane bagasse (SCB) biomass via formic /peroxyformic acid process treatment and acid hydrolysis at an atmo...... hiện toàn bộ
Assessmentof the sensitivity of rural fresh water and sanitation to the climate change – a case study in Can Gio district
Tạp chí Khoa học Tự nhiên Đại học Quốc gia Thành phố Hồ Chí Minh - Tập 1 Số 6 - Trang 214-224 - 2018
This work aimed at calculating and assessing sensitivity (S) to the climate change (CC) of the rural fresh water and sanitation (RFWS), a case study in Can Gio for the period of 2014 – 2025, by index (via 12 indicators), survey, and professional adjustment methods. Results showed that, in 2014, the S index of the whole district was 40.7 (medium low level), ranging from 29–58 among 7 communes (acco...... hiện toàn bộ
Assessing the thermal comfort in non-air conditioned classrooms in Ho Chi Minh City
Tạp chí Khoa học Tự nhiên Đại học Quốc gia Thành phố Hồ Chí Minh - Tập 1 Số T4 - Trang 232-240 - 2017
Thermal comfort is a parameter to assess environmental indoor quality which affects especially performance of students. A cross-sectional study was conducted in classrooms at a university campus in Ho Chi Minh City to assess the thermal condition during the class time. Microclimate parameters were measured at the same time when students answered the survey on their thermal sensation and acceptabil...... hiện toàn bộ
In this study, NaCl at varrious concentrations of 4 – 10 g/L was used to investigate the salt tolerance of in vitro shoot cuttings of Chrysanthemum indicum. Morphological, physiological and biochemical changes during the response of shoot cuttings in the
In this study, NaCl at varrious concentrations of 4 – 10 g/L was used to investigate the salt tolerance of in vitro shoot cuttings of Chrysanthemum indicum. Morphological, physiological and biochemical changes during the response of shoot cuttings in the salinity stress were analyzed. NaCl at 6 g/L reduced the development of shoot cuttings. Under salinity stress conditions, there have just a littl...... hiện toàn bộ
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