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Tytuł:
Fatty Acid Composition and Anticancer Activity of Neutral and Polar Lipids of Pacific Oyster (Crassostrea gigas) Cultured in Khanh Hoa Coast in Vietnam
Autorzy:
Nguyen, Minh V.
Kakooza, Derrick
Do, Thi Hong Tuoi
Tran, Anh P.
Nguyen, Han T.
Tran, Ngoc Q.
Powiązania:
https://bibliotekanauki.pl/articles/31341116.pdf
Data publikacji:
2024-05-24
Wydawca:
Instytut Rozrodu Zwierząt i Badań Żywności Polskiej Akademii Nauk w Olsztynie
Tematy:
anticancer activity
fatty acid profile
lipid fraction
n3/n6 ratio
thrombogenicity
Opis:
In this study, we investigated the fatty acid composition and anticancer activity of neutral and polar lipid fractions extracted from Crassostrea gigas oysters cultured in Nha Phu Lagoon, Khanh Hoa Coast, harvested during the five months of January, April, May, September, and November. Analysis revealed that saturated fatty acids (SFAs) were the most abundant fatty acids in the neutral lipid fraction, followed by monounsaturated fatty acids (MUFAs) and polyunsaturated fatty acids (PUFAs). Conversely, the polar lipid fraction exhibited a different order, with PUFAs being the most abundant, followed by MUFAs and SFAs. Eicosapentaenoic acid (EPA) and docosahexaenoic acid (DHA) were identified as the most prevalent polyunsaturated fatty acids, while oleic acid and palmitic acid were the predominant monounsaturated and saturated fatty acids, respectively. Notably, the combined content of EPA and DHA in the polar lipid fraction consistently exceeded 30% throughout all five months of analysis. Thrombogenicity index (TI) values ranged from 0.13 to 0.29 for the polar lipid fraction and from 0.6 to 1.1 for the neutral lipid fraction. Moreover, the polar lipid fraction exhibited significantly higher n3/n6 ratios compared to the neutral lipid fraction. The polar lipid fraction exhibited stronger inhibitory effects on the growth of the three cancer cell lines (HepG2, MDA-MB-231, and RD) compared to the neutral lipid fraction. The findings of the present study show that lipids extracted from C. gigas oysters cultured in Khanh Hoa Coast have a weak anticancer activity but may still aid in prevention and treatment of certain cancer types.
Źródło:
Polish Journal of Food and Nutrition Sciences; 2024, 74, 2; 169-176
1230-0322
2083-6007
Pojawia się w:
Polish Journal of Food and Nutrition Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Developing Criteria for Assessing The Stability of Water Supply Models in High Mountains and Water-Scare Areas
Autorzy:
Nguyen, Manh Truong
Dinh, Anh Tuan
Nguyen, Tiep Tan
Vu, Thi Hong Nghia
Do, Van Binh
Powiązania:
https://bibliotekanauki.pl/articles/27323245.pdf
Data publikacji:
2023
Wydawca:
Polskie Towarzystwo Przeróbki Kopalin
Tematy:
criteria
water supply
high mountain
Vietnam
kryteria
Wietnam
woda
Opis:
The article presents the scientific basis for assessing the stability of water supply models and develops a suitable set of criteria to assess the stability of water supply works, which includes the water supply part for water supply works and systems (including headworks and water distribution systems) in high mountains and water-scarce areas in Vietnam. Research results indicate that in order to improve the stability and availability of water of the models that have been, are and will be built, it is necessary to have a common method of evaluating effectiveness for scientific models of domestic water supply. Accordingly, it is necessary to build obtain a suitable set of criteria to assess the stability of the water supply model (source + water supply works) in the high mountains, water-scarce areas in Vietnam.
Źródło:
Inżynieria Mineralna; 2023, 2; 179--186
1640-4920
Pojawia się w:
Inżynieria Mineralna
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Effect of Power Quality on the Performance of Explosion-Proof Transformers in Mining in Vietnam
Autorzy:
Do, Nhu Y.
Ngo, Xuan Cuong
Nguyen, Thi Hong
Powiązania:
https://bibliotekanauki.pl/articles/25212166.pdf
Data publikacji:
2023
Wydawca:
Polskie Towarzystwo Przeróbki Kopalin
Tematy:
power quality
performance
explosion-proof transformer
fuzzy system
górnictwo
jakość energii
Wietnam
Opis:
When meeting customer demand, utility companies must consider power quality. Currently, the industrial power network in general and the underground mine power network in particular have long feeder lines, supplying power to many nonlinear loads and power electronic converters, which reduces power quality. Poor power quality can damage sensitive equipment and lead to costly repairs, leading to lost time, data corruption, and lower productivity. In this paper, a fuzzy system is developed to determine the power quality of the power network for different operating conditions and study its influence on the performance of the explosion-proof transformer in the underground mine power network in Vietnam. The simulations and calculations were performed on Matlab-Simulink software for a three-phase, 630-kVA, 6/1.2 kV explosion-proof transformer in power networks with variable power quality. A fuzzy system is developed with four measurable inputs, including frequency deviation, voltage unbalance factor, total harmonic distortion of supply voltage, total harmonic distortion of current, and an output variable, power quality. The simulation results show that the explosion-proof transformer's performance decreases when the power quality degrades, and the proposed fuzzy system can accurately diagnose this.
Źródło:
Inżynieria Mineralna; 2023, 2; 61--69
1640-4920
Pojawia się w:
Inżynieria Mineralna
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Effects of social marketing on attitudes and behavior related to road traffic in Hanoi city
Autorzy:
Nhung, Ngo Thi Hong
Hai, Do Huu
Dung, Vu Tri
Thong, Le Ngoc
Trung, Pham Quang
Cuong, Nguyen Hung
Powiązania:
https://bibliotekanauki.pl/articles/27314064.pdf
Data publikacji:
2023
Wydawca:
Politechnika Śląska. Wydawnictwo Politechniki Śląskiej
Tematy:
social marketing
attitude
behavior
road traffic
marketing społeczny
postawa
zachowanie
ruch drogowy
Opis:
Dangerous and risky actions while traveling on traffic routes that threaten the health, spirit and life of vehicle drivers and others. However, to raise community awareness, make them care about traffic safety behavior takes time and influence attitudes to create behavior change in a sustainable way. Research based on Ajzen’s theory of planned behavior [1, 2] and the theory of social marketing was conducted to identify the factors influencing the road traffic attitudes and behaviors of people in Hanoi and the degrees of their influence. The results show that road traffic attitudes are affected, in descending order, by partnership, resources, distribution, promotion, price, product, and public. The road traffic behavior of people is determined, in descending order, by age, moderator variables (the law and the validity of the law and weather), attitude, and education level. Based on the results, several recommendations to government officials and policymakers have been made.
Źródło:
Transport Problems; 2023, 18, 1; 193--202
1896-0596
2300-861X
Pojawia się w:
Transport Problems
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Hybrid end-to-end approach integrating online learning with face-identification system
Autorzy:
Nguyene, Dat Van
Nguyen, Son Trung
Pham, Thi Hong Anh
Pham, Van Toan
Hoang, Thao Thu
Thanh, Ta Minh
Powiązania:
https://bibliotekanauki.pl/articles/27312886.pdf
Data publikacji:
2023
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
Tematy:
facial recognition
visual search engine
end-to-end applications
online learning
ElasticSearch (ES)
ES
Opis:
Facial recognition has been one of the most intriguing and exciting research topics over the last few years. It involves multiple face-based algorithms such asfacial detection, facial alignment, facial representation, and facial recognition. However, all of these algorithms are derived from large deep-learning architectures, leading to limitations in development, scalability, accuracy, and deployment for public use with mere CPU servers. Also, large data sets that contain hundreds of thousands of records are often required for training purposes. In this paper, we propose a complete pipeline for an effective face-recognition application that requires only a small data set of Vietnamese celebrities and a CPU for training, solving the problem of data leakage, and the need for GPU devices. The pipeline is based on the combination of a conversion algorithm from face vectors to string tokens and the indexing & retrieval process by Elasticsearch, thereby tackling the problem of online learning in facial recognition. Compared with other popular algorithms on the same data set, our proposed pipeline not only outperforms the counterpart in terms of accuracy but also delivers faster inference, which is essential to real-time applications.
Źródło:
Computer Science; 2023, 24 (1); 141--161
1508-2806
2300-7036
Pojawia się w:
Computer Science
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Identifying Key Parameters Influencing Soil Quality at Various Depths in Tram Chim National Park, Dong Thap Province, Vietnam
Autorzy:
Giao, Nguyen Thanh
Nhien, Huynh Thi Hong
Dan, Truong Hoang
Ni, Duong Van
Powiązania:
https://bibliotekanauki.pl/articles/2202379.pdf
Data publikacji:
2023
Wydawca:
Polskie Towarzystwo Inżynierii Ekologicznej
Tematy:
soil quality
national park
organic matter
alkaline soil
multivariate analysis
Opis:
This study used multivariate statistics including cluster analysis (CA) and principal component analysis (PCA) to evaluate the variability and key indicators causing changes in soil quality in Tram Chim National Park, Dong Thap province, Vietnam. Soil samples were collected in the dry season at the habitats of Ischaemum rugosum (CM), Panicum repens (CO), Nelumbo nucifera (LS), Eleocharis dulcis (NO), Oryza rufipogon (LM), Rice field (RL), Melaleuca cajuputi (T) in two layers: A (0–20 cm) and B (20–40 cm). The parameters of pH, total nitrogen (TN), total phosphorus (TP), total acidity (TA), organic matter (OM), total iron (Fe) and exchanged aluminum (Al3+) were used to assess soil quality. The results showed that soil pH was low in both A and B layers. Fe and Al were both high, and the concentrations of these metals in layer A were higher than those in layer B. The OM content was medium while the TN and TP levels were very low. Most of the soil quality indicators tended to decrease with the depth (except for TA). The results of CA analysis showed that there was almost no major change in soil quality between the two soil layers; however, the soil quality in rice field habitat was different from other habitats. The cause may be due to human impact in adding fertilizers/pesticides during farming practices. The PCA results showed at least five influencing factors, explaining 99.7% and 99.9% of soil quality variation in A and B layers. The Al3+, TA, OM, and TP parameters had the main influence on the soil quality of layer A. Meanwhile, the pH, Al3+, TA, TN, Fet indicators had influence on the soil quality of layer B. These indicators need to be future surveyed to assess the evolution of soil quality in the study area.
Źródło:
Journal of Ecological Engineering; 2023, 24, 2; 81--91
2299-8993
Pojawia się w:
Journal of Ecological Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Intention of the Households in Domestic Waste Classification in Vinh Chau Town, Soc Trang Province, Vietnam
Autorzy:
Giao, Nguyen Thanh
Kiet, Nguyen Tuan
Nhien, Huynh Thi Hong
Phuc, Son
Powiązania:
https://bibliotekanauki.pl/articles/2202374.pdf
Data publikacji:
2023
Wydawca:
Polskie Towarzystwo Inżynierii Ekologicznej
Tematy:
domestic solid waste
household
intention to segregate garbage
Vinh Chau town
Soc Trang province
Opis:
The study was conducted to determine the factors affecting the intention of people to segregate garbage in Vinh Chau town, Soc Trang province, Vietnam by surveying 198 households. Cronbach’s alpha analysis method, EFA analysis, and linear regression analysis were used in the study. The analysis results of Cronbach’s Alpha index, KMO and Bartlett's test showed that the questionnaire data used in the study was highly reliable and were suitable for EFA analysis. The results of linear regression analysis identified three factors including "subjective norm", "control of cognitive behavior" and "perceived level of garbage classification information" that had positive impact on intention of domestic solid waste classification of local people in Vinh Chau town, Soc Trang province, in which "subjective norm" was considered to be the most influential factor on the intention to classify domestic solid waste in the study area. Besides, the intention of the people to segregate the domestic solid waste was highly appreciated, but it has not been widely implemented in the locality. Therefore, the study proposed some governance implications based on the factors affecting the intention of people to classify household solid wastes. In particular, local authorities should pay special attention to propagating and disseminating policies and guidelines on the information of domestic solid waste and implementing a model of waste segregation at source.
Źródło:
Journal of Ecological Engineering; 2023, 24, 2; 1--11
2299-8993
Pojawia się w:
Journal of Ecological Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Numerical Study on Effects of Airflow Parameters on the Air Temperature the at Mechanized Longwall of Mongduong Coal Mine
Autorzy:
Nguyen, Hong Thi
Nguyen, Quang Van
Powiązania:
https://bibliotekanauki.pl/articles/27323262.pdf
Data publikacji:
2023
Wydawca:
Polskie Towarzystwo Przeróbki Kopalin
Tematy:
numerical modelling
Ansys CFX
mechanized longwall
temperature of air mine
velocity of air mine
Mongduong coal mine
modelowanie numeryczne
temperatura
powietrze kopalniane
Wietnam
Opis:
The increasing depth of extraction and the degree of mechanization leading to the risk of workers working in poor microclimate conditions has become one of the major safety issues in coal mines. During the survey of the current microclimate in Mongduong coal mine, it showed that the temperature of the mechanized longwall exceeded the permissible regulations (t°≤ 30°C), the air humidity is about 95–100%. The reason for the increase of air temperature in longwall is due to geothermal, heat radiated from the longwall equipment and the inlet wind high temperature. To improve the thermal environment in the mechanized longwall area, Vietnam's coal mines open use ventilation, but the efficiency is not high. Therefore, the paper evaluated the influence of airflow on the temperature of the longwall, 7 models with different air flow velocities and 3 models with inlet air temperature have been created in ICM-CFD and simulated by Ansys CFX software. The environment temperature of each model was evaluated by analyzing the average temperature of the roadway section, the cross-section distribution of the roadway temperature and the velocity streamline of the whole roadway. As a result, the air flow rate increases leading to the air temperature in the longwall decreases, however the wind speed is limited. The inlet temperature of the gas stream is an important factor that affects the thermal environment in the longwall. The results of the article are the basis for making solutions to improve the thermal environment suitable for high-temperature longwall.
Źródło:
Inżynieria Mineralna; 2023, 2; 89--96
1640-4920
Pojawia się w:
Inżynieria Mineralna
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
An application of the Negative Malmquist model for Vietnamese garment and textiles industry
Autorzy:
Nguyen, Thi Kim Lien
Nguyen, Xuan-Huynh
Pham, Hong V.
Powiązania:
https://bibliotekanauki.pl/articles/2175875.pdf
Data publikacji:
2022
Wydawca:
STE GROUP
Tematy:
negative malmquist model
data envelopment analysis
garment and textile company
efficiency
Opis:
The study purpose is to measure the performance of the Vietnamese garment and textiles industry by means of the Negative Malmquist model using the data envelopment analysis (DEA) method. The empirical results presented the efficient, inefficient cases, and average efficiency for all garment and textile companies in Vietnam during from 2016 to 2020. The main findings determined that five companies, including HTG, TET, MSH, M10, and BDG possessed efficiency scores in whole terms. An overall picture of the garment and textiles industry in Vietnam is used to evaluate the operational process. The research recommends a feasible alternative method to deal with inefficient cases.
Źródło:
Management Systems in Production Engineering; 2022, 1 (30); 74--79
2299-0461
Pojawia się w:
Management Systems in Production Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Analysis of Spatial-Temporal Variations of Surface Water Quality in the Southern Province of Vietnamese Mekong Delta Using Multivariate Statistical Analysis
Autorzy:
Hong, Tran Thi Kim
Viet, Le Hoang
Giao, Nguyen Thanh
Powiązania:
https://bibliotekanauki.pl/articles/2173256.pdf
Data publikacji:
2022
Wydawca:
Polskie Towarzystwo Inżynierii Ekologicznej
Tematy:
surface water
organic pollution
multivariate statistical analysis
Tien Giang province
Opis:
The study aimed to assess the variation in surface water quality in the Tien Giang province, Vietnam, and at the same time identify the main sources of water pollution. The surface water quality samples were collected at 34 locations (NM01-NM34) with 17 surface water quality indicators in March, June, September and November in canals and rivers in the Tien Giang province. Multivariate statistical analysis methods, including principal component analysis (PCA), cluster analysis (CA) and numerical discriminant analysis (DA), were used to analyze the variability and key indicators affecting the effect of multivariate statistical analysis. The analysis results show that the surface water quality in the study area is contaminated with organic (low DO, high BOD and COD) and nutrients (NH4+-N, NO2--N, PO43--P and TP), salinity (high Cl-). The PCA results showed that 14/17 surface water environmental parameters to be monitored are pH, temperature, TSS, BOD, COD, NH4+-N, NO2--N, PO43--P, TP, SO42-, Cl-, coliform and Fe. The PCA analysis showed that PC1-PC4 accounted for 79.70% of the variation in surface water quality in the study area. Potential surface water polluting sources include hydrological regime, domestic waste, agricultural production, industrial production activities. The CA results showed that 34 monitoring locations can be reduced to 27 locations, with a frequency of 4 times/year to ensure surface water quality representativeness. The DA indicated that the indicators of EC, SO42- and Cl- made the difference of the surface water quality between the wet and dry seasons. The current results provide important information on the current state of water quality for different uses and contribute to the improvement of the surface water quality monitoring system in the Tien Giang province.
Źródło:
Journal of Ecological Engineering; 2022, 23, 7; 1--9
2299-8993
Pojawia się w:
Journal of Ecological Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Assessment of Occurrence, Ecological and Health Risk of Heavy Metals in Agricultural Soil in the Hau Giang Province, Vietnam
Autorzy:
Hong, Tran Thi Kim
Dan, Truong Hoang
Giao, Nguyen Thanh
Powiązania:
https://bibliotekanauki.pl/articles/2173352.pdf
Data publikacji:
2022
Wydawca:
Polskie Towarzystwo Inżynierii Ekologicznej
Tematy:
agricultural soil
ecological risk
health risk
Hau Giang province
Opis:
The study aimed to evaluate the occurrence of some heavy metals in agricultural soil in the Hau Giang province, Vietnam. The geographical accumulation index (Igeo), pollutant load index (PLI) and ecological risk index (RI) are used to assess the pollution levels and potential ecological risks due to the presence of heavy metals in agricultural soil. The results showed that the mean concentrations of Cu, Pb and Zn in the soil ranged from 16.25–40.32, 18.05–29.92 and 52.78–147.22 mg/kg, respectively, within the limits of QCVN 03-MT:2015/BTNMT. Cluster analysis showed that Pb originated from the process of using fertilizers, especially phosphate fertilizers in farming. Cu and Zn possibly share a common origin from the use of pesticides and fungicides in agricultural production. The Igeo value of Cu, Pb and Zn gradually increases in the order of Cu < Zn < Pb. The PLI (1.03–1.97) reflected that the soil in the study area is moderately polluted. The RI (14.80–25.33) represented a low potential ecological risk. In particular, position D3 had the highest level of pollution and risk among the study sites. Pb had the highest level of accumulation in soil with the highest single ecological risk factor; thus, measures should be taken to limit the source of Pb generation. The results of the study also indicated that ingestion route is the main exposure pathway by which heavy metals can be harmful to humans.
Źródło:
Journal of Ecological Engineering; 2022, 23, 9; 61--71
2299-8993
Pojawia się w:
Journal of Ecological Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Digital Transformation in Mining Sector in Vietnam
Transformacja cyfrowa w sektorze wydobywczym w Wietnamie
Autorzy:
Van Hau, Nguyen
Khanh Ly, Chau Thi
Quynh Nga, Nguyen
Hong Duyen, Nguyen Thi
Huong Hue, Tran Thi
Powiązania:
https://bibliotekanauki.pl/articles/2172085.pdf
Data publikacji:
2022
Wydawca:
Polskie Towarzystwo Przeróbki Kopalin
Tematy:
digital transformation
coal-mineral industry
mechanization
transformacja cyfrowa
przemysł węglowo-mineralny
mechanizacja
Opis:
Digital transformation is one of the inevitable trends in today’s world. Vietnam is one of the pioneer countries following this trend and has launched a national digital transformation program. Digital transformation has attracted great interest from both the community of scientists and managers in general and in the field of coal mining and other minerals. Currently, researchers have been focusing on issues, such as the theory of digital transformation in both state and the business sector, the relationships between digital transformation and the building of e-government or digital government, and between digital transformation and effective national administration. In this study, the method of document-based analysis (Desk review) was used to analyze and evaluate the current situation of digital transformation of the coal and mineral mining industry and identify achievements as well as limitations of the digital transformation process in the coal and mineral mining industry in Vietnam. The study presents the following issues: (1) Some general issues about digital transformation, in which the concept of digital transformation is clarified; Meaning of digital transformation in the field of coal and mineral mining; Requirements for digital transformation in the field of coal-mineral mining. (2) The current status of digital transformation in coal-mineral mining in Vietnam, including applying advanced technologies in exploration and mining, and application of advanced technologies in mining and environmental protection.
Cyfrowa transformacja to jeden z nieuniknionych trendów w dzisiejszym świecie. Wietnam jest jednym z pionierskich krajów podążających za tym trendem i uruchomił krajowy program transformacji cyfrowej. Transformacja cyfrowa cieszy się dużym zainteresowaniem zarówno środowiska naukowców, jak i menedżerów w ogóle oraz w obszarze górnictwa węgla kamiennego i innych kopalin. Obecnie badacze koncentrują się na takich zagadnieniach, jak teoria transformacji cyfrowej zarówno w państwie, jak iw sektorze biznesowym, związki między transformacją cyfrową a budową e-government lub cyfrowego rządu oraz między transformacją cyfrową a efektywną administracją państwową. W niniejszym opracowaniu metoda analizy dokumentów (Desk review) została wykorzystana do analizy i oceny aktualnej sytuacji transformacji cyfrowej górnictwa węgla kamiennego i kopalin oraz identyfikacji osiągnięć i ograniczeń procesu transformacji cyfrowej w górnictwie węglowym i mineralnym. przemysł wydobywczy minerałów w Wietnamie. W opracowaniu przedstawiono następujące zagadnienia: (1) Niektóre ogólne zagadnienia dotyczące transformacji cyfrowej, w których doprecyzowano pojęcie transformacji cyfrowej; Znaczenie transformacji cyfrowej w obszarze górnictwa węglowego i mineralnego; Wymagania transformacji cyfrowej w obszarze górnictwa węglowo-mineralnego. (2) Aktualny stan transformacji cyfrowej w górnictwie węglowo-mineralnym w Wietnamie, w tym zastosowanie zaawansowanych technologii w eksploracji i wydobyciu oraz zastosowanie zaawansowanych technologii w górnictwie i ochronie środowiska
Źródło:
Inżynieria Mineralna; 2022, 2; 21--30
1640-4920
Pojawia się w:
Inżynieria Mineralna
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Ecological Risk Assessment for Occurrence of Toxic Elements in Various Land Use Types in Vietnamese Mekong Delta Province
Autorzy:
Nhien, Huynh Thi Hong
Mi, Le Thi Diem
Giao, Nguyen Thanh
Powiązania:
https://bibliotekanauki.pl/articles/2173267.pdf
Data publikacji:
2022
Wydawca:
Polskie Towarzystwo Inżynierii Ekologicznej
Tematy:
An Giang
ecological risk
heavy metals
land use type
pollution index
Opis:
A total of 316 soil samples in the An Giang province were collected from the industrial zone (48 samples), mining (40 samples), farming (112 samples), landfills (88 samples) and cemeteries (28 a samples) to analyze toxic elements, including Cu, Zn, Pb, Cd and As. The geoaccumulation index (Igeo), pollutant load index (PLI) and potential ecological risk index (RI) were used to assess pollution levels and ecological risks. The results showed that the concentrations of heavy metals were almost still within the allowable limits of national standards. Cd was not detected. Heavy metals were detected in the soil in the following order: As < Pb < Cu < Zn, mining < industrial < landfill < cultivation < cemetery areas. The heavy metals contributing to soil environmental variability were similarly identified in the cemetery with industry and landfill with farming. The value of Igeo shows that As has a high potential to accumulate in soil in all land uses. The ranges of PLI values presented that the soil in industrial, farming, mining and landfills areas were classified moderate, while the cemetery areas has been rated at a high level. The RI values identified very high, high, and moderate ecological risks for cemetery, industrial and farming land and landfill, mining, respectively. The combination of PLI and RI indices showed that the cemetery areas were at the highest levels of pollution and risk. The results of this study provide scientific information on pollution level and ecological risks in various land use types supporting environmental zoning and managing strategies in the An Giang province.
Źródło:
Journal of Ecological Engineering; 2022, 23, 7; 121--130
2299-8993
Pojawia się w:
Journal of Ecological Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Impact of ownership concentration on the innovation of small and medium-sized enterprises
Wpływ koncentracji własności na innowacyjność małych i średnich przedsiębiorstw
Autorzy:
Oanh, Dao Le Kieu
Nguyen, Hong Thu
Linh, Nguyen Tran Xuan
Nhan, Do Thi Thanh
Powiązania:
https://bibliotekanauki.pl/articles/27315295.pdf
Data publikacji:
2022
Wydawca:
Politechnika Częstochowska
Tematy:
ownership concentration
innovation
SMEs
FDI
Bayes
koncentracja własności
innowacje
MŚP
BIZ
Opis:
The study was conducted to assess the impact of ownership concentration on the innovation of Small and Medium-sized Enterprises (SMEs) in Vietnam. Furthermore, innovation is seen as an important element in creating competitiveness to achieve long-term development for a company. This topic has been reported in many previous pieces of research where innovation is often measured through the number of patents. However, this study measures the innovation of SMEs through whether these businesses introduce products/services or introduce a new production process or new technology in 3 years. By Logit Bayes regression method, the research results show that ownership concentration harms the innovation of SMEs in Vietnam. The authors explain this result through channels like "access to capital" and the "Risk aversion" channels.
Badanie przeprowadzono w celu oceny wpływu koncentracji własności na innowacyjność małych i średnich przedsiębiorstw (MŚP) w Wietnamie. Ponadto innowacyjność postrzegana jest jako ważny element tworzenia konkurencyjności w celu osiągnięcia długoterminowego rozwoju firmy. Ten temat został poruszony w wielu poprzednich badaniach, w których innowacyjność jest często mierzona liczbą patentów. Jednak badanie to mierzy innowacyjność MŚP poprzez to, czy te firmy wprowadzają produkty/usługi lub wprowadzają nowy proces produkcyjny lub nową technologię w ciągu 3 lat. Wyniki badań metodą regresji Logit Bayes pokazują, że koncentracja własności szkodzi innowacyjności MŚP w Wietnamie. Autorzy wyjaśniają ten wynik kanałami, takimi jak „dostęp do kapitału” i „niechęć do ryzyka”.
Źródło:
Polish Journal of Management Studies; 2022, 25, 1; 312--326
2081-7452
Pojawia się w:
Polish Journal of Management Studies
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Variation in Growth and Yield of Sacha Inchi (Plukenetia Volubilis L.) under Different Ecological Regions in Vietnam
Autorzy:
Van, Quang Vu
Thi, Ngoc Yen Pham
Thi, Tram Nguyen
Van, Muoi Nguyen
Van, Thanh Le
Thi, Bich Ngoc Vu
Thi, Bich Hong Nguyen
Powiązania:
https://bibliotekanauki.pl/articles/2173335.pdf
Data publikacji:
2022
Wydawca:
Polskie Towarzystwo Inżynierii Ekologicznej
Tematy:
ecological region
growth
sacha inchi
selection
yield
Opis:
The sacha inchi seeds (Plukenetia Volubilis L.), collected from different ecological regions of Vietnam (the Northern Mountainous region, the North Central region, and Central Highlands Area), were sown in the spring crop (March 2020) in Gia Lam district, Hanoi city, Vietnam. The variety S18 was copyrighted by Ministry of Agriculture and Rural Developmentof Vietnam in 2019 as a special medicinal plant variety. During the period of 26 months after planting, the agronomical parameters, growth and development characteristics (leaf form, number of inflorescences per branches, number of female flowers per inflorescences, etc.), pests and diseases, yields and yield components (number of seeds per fruit, seed weight, seed grain, etc.), ratio of kernel per seed and ratio of oil per seed were evaluated. The evaluation results show that the collected sacha inchi lines have a time from sowing to flowering and fruiting of 108–125 days, a fruiting to ripening of 123–125 days, and a time from sowing to harvesting the first batch of 244–250 days. The annual harvest is carried out at two main times: May–June and November–January. The actual yield of the first two periods is high (2.66–3.07 tons per hectare), and the highest yield is collected in the Northern Mountainous area is 3.07 tons per hectare (in Tuyen Quang province), while and 3.01 tons per hectare are collected in the North Central region (in Thanh Hoa province). In the nursery, root rot caused 2.1–5.3% deaths and green wilt caused 3.1–4.8% deaths of seedlings. In the planting garden, fruit borers, stem borers, cavity worms and red spiders were discovered, causing more serious damage than other types (from 5 to over 50%). The results of evaluation of growth, development, yield components and yield showed that the sacha inchi lines collected in the North Central region (in Thanh Hoa province) and the Northern Mountainous region (in Tuyen Quang province) is the best.
Źródło:
Journal of Ecological Engineering; 2022, 23, 8; 162--169
2299-8993
Pojawia się w:
Journal of Ecological Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Wyświetlanie 1-15 z 36

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