bluuebunny/crossref_metadata_2025_split huggingface dataset:
The Impact of Product Quality on Customer Satisfaction and Loyalty toward Hydroponic Vegetables in Padang City: Gender as Moderation Variable
Authors: Raesi Syahyana , Paloma Cindy , Yusmarni  
Published: May 2024

Abstract
Hydroponics can be an innovative and sustainable agricultural food system method that offers potential solutions to some of the challenges posed by climate change. The purpose of this study is to examine how product quality and consumer satisfaction on consumer loyalty to hydroponic vegetables in Padang City, West Sumatra. Gender is also considered a moderating variable in customer loyalty. Between May and June 2023, data was collected from 100 hydroponic vegetable consumers in Padang City using the accidental sampling method and were analyzed using Structural Equation Modeling-Partial Least Squares (SEM-PLS) with SMART PLS 3.3 software. The results revealed a positive and significant correlation between the quality of hydroponic products, consumer satisfaction, and consumer loyalty. Consumer satisfaction was found to be positively and significantly related to consumer loyalty. However, genders moderating effect on consumer loyalty was found to be positive but insignificant. The findings hold practical implications for stakeholders, especially hydroponic producers and marketers. They underline the pivotal role of product quality, necessitating careful attention to aspects like freshness, cleanliness, and durability prior to market entry. Policymakers and marketers can promote hydroponic vegetables as a gender-neutral, healthy, and sustainable food option. The universality of vegetable needs makes vegetables attractive to a wide range of consumers to support food system sustainability.
Peatland Forest Fire Mitigation Policies: Impact on Traditional Farmer’s Food Security and Environmental Improvement
Authors: Ekawati S , Siburian R , Yanarita  , Surati  , Nurlia A , Sundary L V 
Published: May 2024

Abstract
Indonesia is one of the countries with the most vulnerable food security to the effects of climate change. Peatlands have a considerable potential for crop production, but they must be managed carefully. The government issued a regulation restricting burning the land for farming preparation in response to forest and land fires on peatlands. Unfortunately, traditional farmers lost their food security due to that policy. This research aims to: i) analyze farmers’ food security and its impact on improving the environment after the policy banning burning in land preparation. Data was collected through interviews, field observations, and focus group discussions. The acquired data is analyzed qualitatively and descriptively. According to the study’s findings, their land no longer supports farmer’s food availability, and they must pursue new livelihoods to afford to buy their daily needs from the nearest market. Food utilization is still superficial. Farmers’s food stability is extremely fragile due to the impact of policies, pest invasions, droughts, and floods. Although the policy bans burning in land preparation causes farmers to lose their self-sufficient food security, it has improved peatland ecosystems. The government must strengthen community empowerment programs to restore farmers’ food security.
The Role of the United Nations Environment Program (UNEP) In Overcoming Deforestation In Central Kalimantan 2017-2020
Authors: Susilowati Ida , Sholeh Mohamad , Yunus Nur Rohim , Ainaya Dinah Alifia 
Published: May 2024

Abstract
Climate change is a global environmental problem, one of the causes of which is deforestation. As the second largest province in Indonesia, with forest area reaching 50% of the total area, Central Kalimantan has a vital role in environmental problems and deforestation. Government policies that convert forests into non-forest areas increase the rate of deforestation and increase global emissions. Deforestation is a worldwide problem that requires joint attention in handling, especially for the United Nations Environment Program (UNEP) as the international environmental regime. This research is a type of qualitative research that uses analytical descriptive methods to describe the phenomenon of deforestation in Central Kalimantan and UNEP’s role in overcoming it. Library study techniques are used to collect research data in documents, which are compiled, analyzed, and concluded. UNEP’s role in realizing SDG 13 is examined using an international regime approach through global diplomacy. The research results show that UNEP, as an international regime, plays a vital role in making global regulations regarding handling climate change from the deforestation sector through REDD+. In its implementation, UNEP assisted Indonesia in implementing REDD+ in Central Kalimantan and acted as a catalyst, facilitator, advocate, and educator on the issue of deforestation in Central Kalimantan in 2017-2020. This research is essential to show the urgency of the multi-stakeholder role in global diplomacy in dealing with climate change.
Are our lands getting wetter or drier? A perspective from Climate scenario data in Upper Brantas
Authors: Wiwoho Bagus Setiabudi , Astuti Ike Sari , Bachri Syamsul , Azhar Rifqi Anshori , Herlambang Gilang Aulia , Dargusch Paul 
Published: May 2024

Abstract
Changes in rainfall are considered influential for sustaining the land resources in tropical agriculture. Many areas in East Java are classified as top priorities in adaptation and mitigation programs, especially in the agricultural and water resources sectors. Climate change impacts have been documented through global-scale General Circular Models (GCM). This study examined the future estimated climate generated from the CMIP5 model of the globe’s climate of four greenhouse gas scenarios in the Brantas Hulu watershed and studied the consequences for the agricultural climate suitability. The study exploited the 18 climate calculation models at the regional level by focusing on RCP 4.5, the development scenario considered in Indonesia’s climate action. During the 2000-2099 predictions, temperature and precipitation increased in all models. If this increase continues to be experienced without efforts for proper mitigation and adaptation plans, the disruption in agricultural products might pose a major consequence for food security.
Understanding Farmers Perception of Climate Change to Prepare Adaptation of Farmers
Authors: Aisyah I , Darwanto D H , Masyhuri  , Utami A W 
Published: May 2024

Abstract
The impact of climate change has resulted in a decline in agricultural productivity. This study estimated farmers’ perceptions of climate change by comparing Imogiri Sub-district represent highland area and Pundong Sub-district deputize lowland area farmers in Bantul Regency. This study collected data using questionnaires to 79 respondents then analysis by likerts scale and descriptive statistical. The results showed that there six indicators of climate change became farmers’ perceptions. The farmers perception on highland regarding climate change is that 54% of farmers feel a decrease in rainfall, 54% feel drought, 55.2% feel a longer dry season, 60.8% feel reduced water sources, 74.4% feel a decrease in crop quality and 73.2% feel a decrease in crop quantity. At the same time, the perception of farmers in the lowland area regarding climate change is 66.9% of farmers feel a decrease in rainfall, 68.28% feel drought, 71.03% feel a longer dry season, 68.28% feel reduced water sources, 77.93% feel a decrease in crop quality and 77.93% feel a decrease in crop quantity. The importance of farmers’ perceptions of climate change may be used to adaptation from climate change. Understanding farmers’ perceptions can aid the impact of climate change on agricultural productivity.
Estimating the natural gas compressibility factor using a statistical correlations and machine learning approaches
Authors: Tran Tam Nguyen Thien , Quang Do Khanh , Hoang Quang Trong , Hai Le Nam Nguyen , Nguyen Trong Van 
Published: May 2024

Abstract
Gas compressibility factor plays an critical role in petroleum engineering applications such as gas metering, pipeline design, reserve estimation, gas flow rate, material balance calculations, and many other significant tasks. Therefore, it is crucial to accurately estimate the gas compressibility factor. There have been a lot of studies on calculating the gas compressibility factor from laboratory data, which can be summarized into two main approaches: statistical correlations and machine learning algorithms. In this study, on statistical correlations the authors implement explicit and implicit method while on machine learning algorithms, we use Artificial Neural Network (ANN) and Least-Squares Support Vector Machine (LS-SVM). The data was collected from open literature. Implementing the two approaches mentioned above and comparing statistical parameters such as Mean Squared Error (MSE), Root Mean Squared Error (RMSE), and Coefficient of Determination (R2
) found that machine learning algorithms give much more accurate estimation results than statistical correlations, and besides, the ANN algorithm has the most accurate prediction results with the lowest MSE and RMSE (0.000002 and 0.0016) and the highest R2
(0.9999). The high-precision calculation results show that the ANN algorithm mentioned above can be applied to estimate other real gas compressibility factor data sets. On the other hand, this study can be extended to another subset of machine learning algorithms, such as deep learning and ensemble learning.
Epoxidation of mixture of waste cooking oil and soybean oil with different compositions
Authors: Phan Hong Phuong , Le My Nhan , Khau Hoang Thien Han 
Published: May 2024

Abstract
Epoxidation of soybean oil (SO) blended with waste cooking oil (WCO) of different mass ratio (90:10, 80:20, 70:30, 60:40 and 50:50) was carried out at reaction temperature of 65 °C and reaction time of 7 h. Physicochemical properties of the reagent and product such as viscosity at 40 °C and 100 °C, viscosity index, iodine index as well as FT-IR spectral analysis are studied to investigate the effect of the mixing ratio of SO and WCO on C=C conversion and physical properties of epoxidized product. The experiment results showed that conversion of C=C in the feed oil of different blending ratio through epoxidation at 65 °C and 7 h could reach high value (almost 98 %) with corresponding Iodine Value of all products of nearly 2. The viscosity of epoxidized oil at both 40 °C and 100 °C increased remarkably compared to the values of soybean oil while viscosity index decreased. However, the VI of epoxidized products are in the range of requirement for lubricating oil. Among all samples studied, the mixture of SO and WCO of 90:10 (mass ratio) had the best lubricating properties, with the highest viscosity at both 40 °C and 100 °C (138.22 and 18.50 cSt) and viscosity index (151).
Determination of formaldehyde in indoor air by active and passive sampling methods
Authors: Huynh Thanh-Binh , Dang-Bao Trung , Tran Thi-Kieu-Anh 
Published: May 2024

Abstract
Formaldehyde (HCHO), the simplest molecule of the aldehyde group, is a toxic gas commonly found in indoor air. Many analysis methods have been developed to determine concentrations of formaldehyde in air, including sampling methods (active sampling and passive sampling), analytical methods (spectrophotometry, chromatography), and sensors. In general, the active sampling method is the standard and widely used method, and the passive sampling method is relatively simple, low-cost, and easy to implement. Gas sensing, meanwhile, is a quick detection method and has a lot of research potential. The purpose of this article is to compare analytical methods of formaldehyde in air and to summarize their advantages and disadvantages. This paper also focuses on HCHO passive samplers (the principle of operation, sampler geometries (tube, badge), validation experiments in the laboratory, and their applications in the determination of HCHO in personal/indoor air.
Biological Activities of Crude Extracts of Some Plant Leaves Cultivated in Vinh Long, Vietnam
Authors: Nguyen Thanh Luan , Khoi Tu Thanh , Thi Hai Ha Pham 
Published: May 2024

Abstract
This study carried on assessing the in vitro bioactivities of leaf extracts from five plants collected in Vinh Long Province, Vietnam, including extraction yield, antioxidant, antibacterial, and anticancer activities. Five crude leaf extracts were obtained by maceration with ethanol. The antioxidant, antibacterial, and anticancer activities of five extracts were evaluated separately. The results showed that the leaf extraction yields of Vitex negundo, Acrostichum aureum L., Vitex rotundifolia, Bouea macrophylla Griff, and the highest Jasminum subtriplinerve, respectively, were 1.32%, 1.4%, 1.54%, 1.72%, and 2.95%. The leaf extract of B. macrophylla Griff (BLE) had the highest antioxidant capacity, with an IC50 of 6.4 ± 0.08 μg/ml. Except for A. aureum L. and J. subtriplinerve, the other leaf extracts exhibited antibacterial properties against two Gram-positive bacteria and two Gram-negative bacteria. Notably, BLE demonstrated the maximum antibacterial activity against Listeria monocytogenes and Pseudomonas aeruginosa, with inhibition zones ranging from 15 to 16 mm and a MIC of 12.5 µg/ml. Accordingly, BLE was chosen to test for anticancer potential because its activities seemed to be greater than those of the other extracts. Especially, BLE suppressed the proliferation of HepG2 liver cancer cells with an IC50 of 72.33 ± 0.68 μg/ml. In addition, the phenotype of BLE-stimulated HepG2 cell death was typical of apoptotic cell death by analyzing the morphology and DNA fragmentation assay. Overall, the results indicated that five leaf extracts, particularly BLE, were efficient against all tested bacteria and effectively depressed the viability of HepG2 cancer cells. Furthermore, this study’s findings provide foundations for future research into the mechanisms behind these antibacterial and anticancer capabilities, as well as the knowledge of specific treatment pathways.
Antimicrobial activity of some plant extracts against Kosakonia sacchari causing diseases on a Vietnamese climbing perch (Anabas testudineus)
Authors: Tran Kien Cuong , Thuan Doan Van , Nguyen Thanh Luan 
Published: May 2024

Abstract
The aquaculture of the climbing perch (Anabas testudineus) is presently focused on growth; however, pathogenic infections are an urgent threat, and multi-drug resistant bacteria may transfer and cause disease in other species. Due to its antimicrobial action and growth stimulant, herb medicine has been widely employed as feed additives in environmentally friendly strategies. This study was to investigate the in vitro and in vivo activity of EtOH 96% leaf extracts obtained from five plants including Anacardium occidentale (Ex1), Vitex negundo (Ex2), Vitex rotundifolia (Ex3), Acrostichum aureum L (Ex4), and Jasminum subtriplinerve Blume (Ex5). Using disk diffusion method, the Ex1 exhibited higher antibacterial effect than the other four plant extracts with a concentration of MIC at 12.5 µg/ml. Survival ratio was higher in fish challenged with selected virulence Kosakonia sacchari and then medicated by feed-supplemented with plant extract Ex1 compared to those in non-medicated group. In particular, EX1 help to protect fish from ammonia toxins with survival rates remain at 82%. In addition, supplementation with Ex1 also helped increase the weight gain of fish in each treatment respectively for each fish reach as 1.33 ± 0.07, 0.93 ± 0.03 and 1.35 ± 0.05 g. For efficacy protection of herb medicine. In conclusion, natural herb plant supplement to fish feed will have the potential to replace antibiotics in prophylaxis and be material for enhancing stress tolerant as well as growth promoter. Future study needs to conduct the protection efficacy in pilot scale of aquaculture.
Study of weight loss induction activity of Camellia sinensis, Cynara scolymus, and Coffea robusta
Authors: Thanh Nga Phan Thi , Hoang Dung M 
Published: May 2024

Abstract
This research reports on the effectiveness of herbal infusions (Camellia sinensis, Cynara scolymus, and Coffea robusta) in promoting weight loss in mice. Amongst the infusions, Coffea robusta showed significant weight loss induction in a high-fat diet mouse model (up to 28.11% weight loss). The study also evaluated the total polyphenol content and antioxidant activity of the infusions. Camellia sinensis infusions exhibited the highest total polyphenol values (69.53 ± 0.5 mgGAE/g). Furthermore, this infusion demonstrated impressive antioxidant activity with an IC50 value of 24.45 ± 0.98 μg/mL.
Potential in enhancement of salinity tolerance to crops in Vietnam’s Mekong Delta using endophytes: A review
Authors: Huynh Thu 
Published: May 2024

Abstract
Mekong Delta is the most important agricultural area of Vietnam. In the backdrop of recent climate change, the salinisation in soil is threatening crop plants causing serious damages such as yield loss as well as inhibition of crop quality and productivity in the region. Under salinisation conditions, plant growth and development have to experience negative effects to adverse conditions. The high concentration of Na+ ions in plants hampers water and nutrient uptakes, inhibits pathway of photosynthesis, and changes physiological and molecular mechanisms causing intracellular osmotic and ionic stress. Hence, salinisation in the Mekong Delta area is among key challenges affecting national crop productivity and food security.
This review describes the plant-endophyte interaction associated with saline tolerance and the performance of endophytes in plants under saline stress. Endophytes are within living healthy plants, play an important role in plant growth promotion and enhance the stress-tolerating ability in host plant without obvious negative effects. Halotolerant plants owning beneficially endophytic community are revealed as a microbial biotechnology tool to alleviate saline stress. Accordingly, endophytes within plants can overcome saline stress via multiple mechanisms such as accumulating and synthesizing organic osmolytes, activating the antioxidant defense system and phytohormonal profiles, stimulating the lipidic layer of Gram-negative bacteria and bacterial consortium interactions, regulating key transcripts for saline tolerance, and other unclear mechanisms. The symbiotic plant-endophyte interactions have been considered as a promising mechanism for saline tolerance in numerous recent studies. Therefore, unraveling the mechanisms of saline-tolerating ability using plant-endophyte interactions could provide valuable strategies to improve crop yields. The management of saline stress using endophytic strategies has been promised as a great approach to sustainable agriculture in the Mekong Delta area.
Drying method-affected polyphenolic contents: a microwave-assisted extraction from Cayratia trifolia L. berry
Authors: Nguyen-Doan Minh-Anh , Huynh Thanh-Binh , Tu Quang-Dong , Nguyen Minh-Tam K. , Do Thi-An-Sa , Lam Hoa-Hung , Dang-Bao Trung 
Published: May 2024

Abstract
This work discovered the influence of pretreatment methods (thermal drying and lyophilization (freeze-drying)) on the total phenolic content (TPC), the total flavonoid content (TFC), and the 1,1-diphenyl-2-picrylhydrazyl (DPPH) antioxidant activity of the berry extract of Cayratia trifolia L. of Ca Mau origin (Vietnam). With the assistance of microwave, the freeze-drying method showed higher TPC (9.68 ± 0.31 mg GAE/g), TFC (7.14 ± 0.51 mg QE/g), and DPPH scavenging activity (IC50 of 24.96 ± 0.89 μg/mL) than those of thermal drying method, under the optimal conditions (an extraction time of 60 s, an ethanol concentration of 60% (%v/v), and a ratio of raw material-to-solvent of 1/500 g/mL).
Syzygium nervosum extraction and potent bioactivities
Authors: Lan Thao Phan Ngoc , Tran Thanh Truc 
Published: May 2024

Abstract

Syzygium nervosum leaves have been used in life the Vietnamese regularly as a beverage. S. nervosum leaves were extracted by ultrasonic - assisted extraction method, with the ratio of ingredients: ethanol 99 % = 1 : 30 (w/v), in 30 minutes, at 50 °C, then sonicated for 5 minutes at an ultrasonic frequency of 20 kHz. The result of the content of total polyphenol and total flavonoid was: 67.55 ± 2.28 mg/g and 93.78 ± 6.04 mg/g, respectively. The extraction showed the following results of bioactivities: α - glucosidase enzyme inhibition, IC50 = 0.60 ± 0.11 µg/mL, free radical resistance, IC50 = 14.50 ± 0.71 µg/mL, cholesterol resistance, IC20 = 166.38 µg/mL and anti - inflammatory, IC50 = 351.95 ± 1.98 μg/mL. Our analysis showed potential bioactivities on diabetes, support digestion and inflammatory diseases of Syzygium nervosum leaves in Vietnam.
All-dielectric hybrid VIS-NIR dual-function metaoptic
Authors: Xiong Pei , Nikolov Daniel K , Cheng Fei , Rolland Jannick P , Vamivakas A N 
Published: May 2024

Abstract
Metasurfaces are a promising technology that can serve as a compact alternative to conventional optics while providing multiple functions depending on the properties of the incident light, such as the wavelength, polarization, and incident angle. Here, we demonstrate a hybrid visible/near-infrared dielectric metaoptic capable of reflecting 940 nm light in a specified direction while allowing transmission of visible light (450–750 nm). This dual functionality is achieved by combining an aperiodic distributed Bragg reflector with dielectric meta-atoms. Experimental demonstration is also reported, showing an anomalous reflection of near-infrared light within a 20° full field-of-view and the transmission of wavelengths from 450 nm to 750 nm.
Adaptive multi-spectral mimicking with 2D-material nanoresonator networks
Authors: Luo Yujie , Christensen Thomas , Ilic Ognjen 
Published: May 2024

Abstract
Active nanophotonic materials that can emulate and adapt between many different spectral profiles—with high fidelity and over a broad bandwidth—could have a far-reaching impact, but are challenging to design due to a high-dimensional and complex design space. Here, we show that a metamaterial network of coupled 2D-material nanoresonators in graphene can adaptively match multiple complex absorption spectra via a set of input voltages. To design such networks, we develop a semi-analytical auto-differentiable dipole-coupled model that allows scalable optimization of high-dimensional networks with many elements and voltage signals. As a demonstration of multi-spectral capability, we design a single network capable of mimicking four spectral targets resembling select gases (nitric oxide, nitrogen dioxide, methane, nitrous oxide) with very high fidelity (

>

90
%

). Our results could impact the design of highly reconfigurable optical materials and platforms for applications in sensing, communication and display technology, and signature and thermal management.
The African Intellectual Property Organization
Authors: Schneider Marius , Ho Tu Nam Nora 
Published: May 2024

Abstract
This chapter explores the African Intellectual Property Organization (OAPI), which is one of the two main regional intellectual property organizations in Africa. Membership to the OAPI is open to all African states who become party to the Agreement of Bangui. First created in September 1962, the OAPI is a unitary system for the protection of intellectual property (IP) rights. All member states apply a uniform law, the Bangui Agreement and its ten annexes. The chapter explains how geographical indications (GIs) can be registered and enforced in the OAPI either through the sui generis system or as collective marks or certification marks. The sui generis protection of GIs has been possible at the OAPI since 1977 as appellations of origin inspired by the definition in the Lisbon Agreement and as GIs since 1999.