bluuebunny/crossref_metadata_2025_split huggingface dataset:
Changes and Influencing Factors of Bacterial Communities in Surface Seasonal Frozen Soil at Different Freeze-thaw Stages
Authors: Yu Yao , Hou Shirui , Yin Fengyue , Cao Yang , Guan Jianfei 
Published: February 2025

Abstract
Microorganisms are of great significance to prediction of the response of frozen soil to the climate, as well as the mechanism behind. In order to clarify the impacts of freeze-thaw cycle of soil in terms of different stages on the microorganisms in frozen soil, we sampled the topsoil from typical seasonally frozen ground in Heilongjiang, China, and investigated the samples by using the Illumina MiSeq high-throughput sequencing to clarify the structural composition of the bacterial community. The results showed that different freeze-thaw stages had different impacts on the three bacterial groups (abundance taxa, abundance, and rare taxa, rare taxa). At the phylum level, the abundance of Acidobacteria was significantly higher in the FTP stage than in the TP stage (P<0.05), while the Actinobacteria exhibited negligible variations in different freeze-thaw stages. At the genus level, significant differences were mainly detected in the FP stage. Total phosphorus and total nitrogen in soil were key soil properties affecting bacterial community structure, followed by organic carbon in soil, while pH had negligible impacts on their community structures.
Supramolecular Solvent Based Vortex-Assisted Dispersive Liquid-Liquid Microextraction of Phthalate Esters in Beverages
Authors: Zhao Wei , Hu Jia , Liu Lipeng , Li Yongqi , Huang Jingli 
Published: February 2025

Abstract
A novel method, vortex-assisted dispersive liquid-liquid microextraction technique based on supramolecular solvent (SUPRAS) was developed for the determination of five phthalate esters (PAEs) in beverage samples. The factors influencing SUPRAS type, undecanol and hexafluoroisopropanol (HFIP) volume, pH, vortex time, and standing time were studied and optimized. Under the optimal experimental conditions, PAEs had a wide concentration range (5-1000 ng mL−1) with a good linear relationship (R2≥0.9981), desirable precision (RSDs less than 5.4%), the mean extraction recoveries ranged from 78.1 to 91.2%, and limits of quantification from 0.8 to 1.7 ng mL−1. The proposed methodology was green, sensitive, and economical and was successfully used to detect PAEs in beverage samples.
Research Progress in Microbial Degradation of Plastics
Authors: Liu Peibiao , Liu Juan , Yu Xida , Lv Siyu , Liu Zhaogang , Wang Yudong 
Published: February 2025

Abstract
With the development of society, plastic is widely used in people’s industrial production and daily life, playing an important role in all fields of the world economy. Plastic is notoriously resistant to degradation in natural environments, resulting in severe ‘white pollution’ from widespread accumulation. Particles smaller than 5 mm are recognized for their ecotoxicological impact, posing a significant risk to both human health and the ecosystem. Urgent action is required to address this pressing issue. Compared with the traditional field incineration, concentrated landfill, and recycling methods, microorganisms are becoming a kind of emerging resources for process recycling and plastic degradation, the article summarizes the microbial degradation research report in recent years, explores the current situation of the microbial degradation of plastics, first introduces the structure of the six big plastics, and then focus on the plastic biodegradation mechanism, summarizes the microorganisms of biodegradable plastics in different environment, provide a theoretical basis for further study of plastic microbial degradation, in order to effectively solve the problem of plastic pollution in the environment.
Research and Application of Harmless Disposal and Landfill Technology of Coal Gangue Waste in Shendong Mining Area
Authors: He Ruimin , Cao Pengfei , Chen Yuhang , Zhang Kai , Li Wen 
Published: February 2025

Abstract
Shendong mining area is one of the important coal production bases in China. As a by-product in the process of coal mining, a large accumulation of coal gangue not only occupies land but also causes serious pollution to the environment. In order to solve the problem of coal gangue waste in Shendong mining area as the starting point, the research studies the harmless disposal and landfill technology, aiming to realize the resource utilization and environmentally friendly treatment of coal gangue. First, the physical and chemical properties of gangue, including its composition, structural characteristics and impact on the environment. On this basis, the necessity and feasibility of harmless disposal of coal gangue are discussed. Secondly, for the problem of coal gangue landfill, study the site selection principle, design requirements and construction technology of landfill, as well as the monitoring and management measures after landfill. Finally, through example analysis, the application effect of harmless disposal and landfill technology in Shendong mining area is shown, and the future research direction and policy suggestions are discussed. The results show that the negative impact of coal gangue on the environment can be effectively reduced by the comprehensive development of harmless disposal technology and scientific landfill method.
Study on Eutrophication, Phosphorus Pollution and Morphological Analysis of Separated Lakes
Authors: Liu Xiaozhen , Yang Chen , Zhou Luqiang , Ding Zhiyu , Jiang Dengbiao , Fei Jia 
Published: February 2025

Abstract
After urban lakes are divided into “ponds”, they are more affected by human beings and more prone to eutrophication. In this paper, five “ponds” in a university park in Nanchang were collected as research objects, and samples of lake water quality and sediment, as well as aquatic plants and animals on ecological floating beds were collected. Relevant indicators such as ammonia nitrogen, TP and sediment phosphorus were analyzed in the water, and the relationship between phosphorus form analysis and water eutrophication was discussed. Results: On the surface, severe eutrophication occurred in the lakes, and the water quality was Class V, which was related to external input and internal pollution of sediments. The main influencing factors of environmental pollution involved TP, ammonia nitrogen, etc. The TP content of one reservoir was seriously polluted, while the other three reservoirs were moderately polluted. The higher the pollution level of organophosphorus in sediments, the higher the content of OP in sediments. Fe/Al-P accounted for the majority of inorganic phosphorus in the four reservoirs. Fe/Al-P is active phosphorus and the main cause of eutrophication in ponds. Suggestions: Improve the drainage and diversion of lake water, clean up underwater silt, and cultivate submerged plants.
Investigation on the Application of Carbon Dioxide Power Generation Cycles in Solar Energy Heating Utilization
Authors: Zhang Lei , Jiao Yang , Wang Jian , Wang Lei , Liu Zheng , Lu Yuduo , Dong Lei 
Published: February 2025

Abstract
In the domain of solar thermal energy utilization, the power cycles that utilize carbon dioxide as the working fluid predominantly encompass the transcritical Rankine cycle and the supercritical Brayton cycle. This study employs MATLAB programming to compute and examine the thermal efficiencies of these two cycles across a spectrum of solar collector temperatures ranging from 200 to 1000°C and carbon dioxide working fluid pressures from 10 to 40 MPa. At elevated temperatures, the thermal efficiencies of both cycles augment with the escalation in working fluid pressure; however, at reduced temperatures, the alterations in thermal efficiencies of the two cycles are converse. Furthermore, beyond a specific temperature, the thermal efficiency of the supercritical Brayton cycle consistently surpasses that of the transcritical Rankine cycle. By means of fitting, the relational expressions for the thermal efficiencies of the two cycles being equivalent were ascertained. In light of practical circumstances, it is proposed that the supercritical Brayton cycle should be adopted when the solar collector temperature exceeds 350°C, whereas the transcritical Rankine cycle is more appropriate below 350°C.
Studies of the geometric effect for gaseous X-ray polarimetry
Authors: Jiang Jiechen , Jiao Yang , Jiang Weichun , Liu Xiaohua , Du Yuanyuan , Li Hong , Wu Qiong , Liu Xiaojing , Sun Liang , Yang Jiawei , Xu Yupeng , He Huilin , Feng Hua , Liu Congzhan , Chen Hangyu , Song Zipeng , Zhao Yongqi 
Published: February 2025

Abstract
The geometric effect is an intrinsic response of gaseous
X-ray polarimetry, which exhibits some sharp peaks with a fixed
period angle on modulation curves, especially in observations of
unpolarized sources, resulting in spurious modulation and a
deviation of polarization detection. We construct a simulation
framework to study the origin of the geometric effect and evaluate
the impact on the performance of the polarimetry. The modulation
curves from the simulation are consistent with measurements while
focusing on the geometric effect. The studies show that the
geometric effect is from the photoelectrons generated close to
multiplier stages, a more significant geometric effect with a deeper
depth of the photoelectric impact point. The effect was
characterized by a diffusion coefficient related to photoelectric
drift height to quantify the geometric effect. From the simulation
results, choosing smaller detector units could suppress the effect,
and the size of the detector unit is 1.25 times larger than the
diffusion coefficient related to an observable geometric effect. In
addition, the relative contribution to the effect is approximately
65% for the GEM hole pitch and 35% for the readout pitch. This
study provides a reference for detection unit optimization and the
threshold setting of fired pixels in observations.
Utilization of sacha inchi oil as an alternative to fish oil: A review
Authors: Renata Gabriella , Suryoprabowo Steven 
Published: February 2025

Abstract
Sacha inchi (SI) (Plukenetia volubilis L.) is a wild oleaginous plant of the Euphorbiaceae family that grows in Peruvian Amazon. This plant has attracted significantly more attention from the scientific community and the food industry in the last years due to the exceptional nutritional composition of the seeds, in particular the lipid fraction. SI oil is valuable due to high content of omega-3 and omega-6, which are important in human diet, thus being susceptible to adulteration. Fish oil has been consumed widely across the world for decades due to its significant level of omega-3. However, the increasing demand of fish has made fish availability hard and expensive. This review was done to provide insight and comparing SI oil to fish oil in hopes of highlighting an alternative. Literatures found SI oil and fish oil to have generally similar amounts of omega-3 and therefore can indeed be used as an alternative. However, SI seeds are rather rarer to find compared to fish sources, making them naturally more expensive. The finding from this review is hoped to be of use for further studies in using sacha inchi oil as a replacement for fish oil in order to stabilize the fish industry.
Microbial profile of agar-supplemented tempeh: a strategy towards enhancing the values of tempeh as a functional food
Authors: Surya Reggie , Petsong Kanta , Romulo Andreas , Nugroho David , Tedjakusuma Felicia , Rombot Olifia 
Published: February 2025

Abstract
Tempeh is a traditional food from Indonesia made from soybeans fermented using Rhizopus molds. It conveys essential nutrients and has been considered as a potential functional food providing benefits towards human health. Recently, several strategies have been proposed to improve the values of tempeh as a functional food, one of which includes the supplementation of algae in tempeh. Therefore, the present research would contribute to the sustainable development goal (SDG) No. 3 concerning health and well-being. This study aimed to characterize the microbiological profile of tempeh supplemented and co-fermented with agar, a substance consisting of polysaccharides extracted from the cell wall of red algae (Rhodophyta). The supplementation of agar powder (2.5%(w/w) and 5%(w/w)) significantly reduced the growth of molds and yeasts, but gave rise to the significant growth of lactic acid bacteria in tempeh, thus suggesting the improvement of functional values of tempeh as a probiotic food. The most dominant bacteria in agar-supplemented tempeh are Lactobacillus, Enterococcus, and Pediococcus. Therefore, this study provides the first evidence for supporting agar-supplemented tempeh as a novel functional food.
Physicochemical and sensory evaluation of snack bars with isomalto-oligosaccharides as a honey substitute
Authors: Lie Ryan Reynardo , Widodo Felix , Phothisoot Thitipong , Kongpichitchoke Teeradate , Lo Diana 
Published: February 2025

Abstract
The demand for healthier snack options for functional foods like snack bars has increased. Commonly, honey is used as a binder in snack bars. However, honey is high in calories and sugar. Isomalto-oligosaccharide (IMO), a low-calorie and prebiotic fiber, offers an alternative binding agent. The research aimed to determine the effect of substituting honey with isomalto-oligosaccharide as a binder in snack bar products. Snack bars were made from a combination of IMO and honey with different formulations, ranging from 100% IMO and 0% honey to 0% IMO and 100% honey. The parameters measured were reducing sugar content, moisture content, water activity, hardness, color, and consumer acceptance using the Just-About-Right (JAR) method. The results showed that the higher concentration of IMO compared to honey in the snack bar resulted in a significant increase in brightness (from 22.29±3.52 to 29.56±1.31), yellow color (from 3.26±1.90 to 11.15±3.92), moisture content (from 10.81±0.97% to 14.19±2.80%), and water activity (from 0.70±0.02 to 0.73±0.01). Conversely, there was a decrease in hardness (from 14.69±1.32 N to 7.07±1.51 N) and reducing sugar content (from 40.32±4.93 mg/g to 23.16±1.41 mg/g). Based on penalty analysis, a snack bar made from a combination of 50% IMO and 50% emerges as the most optimal, with a balanced profile, but still requires improvement in excessive hardness, bitterness, and lack of sweetness, brightness, and aroma.
Utilization of non-timber forest products Arenga pinnata as a natural food source
Authors: Latifah Siti , Fachrudin Khaira Amalia , Hartini Kansih Sri , Syahputra OK Hasnanda , Ulum Zahrul , Doufan Sihombing Luthan Ariel , Amelia Mia , Aziz Farhan , Nainggolan Josua , Hawari Muhammad Raihan 
Published: February 2025

Abstract
Sugar palm is a type of palm plant almost spread throughout Indonesia. Sugar palm has many benefits but has not been widely used by communities around the forest. The research aims to determine the use of sugar palm (Arenga pinnata Merr.) in Sibolangit District, Deli Serdang Regency, North Sumatra. The data collection method was carried out through interviews with sugar palm farmers and managers as well as field observations in sugar palm plantations. The selection of respondents used a purposive sampling method namely, key informants such as sugar palm farmers, village heads, traditional community leaders, or religious leaders. The results of observations show that the productive age of sugar palms is 8-12 years and can produce sap of more than 15 liters/day. Based on the research results, it shows that sugar palm plants are used as a food source, namely the fruit part as palm fruit; the juice is taken from the flowers which is then processed into palm sugar and palm wine; flour from processed stems. The use of arena pinnata as a food source at the research location is still very simple and the processing production potential has not been able to be realized optimally.
Sensory and textural properties of gluten-free muffins made from taro (Colocasia esculenta), banana (Musa acuminata) and sweet potato (Ipomea batatas L.) flours
Authors: Ervina Ervina , Imannuel Nathan Efata 
Published: February 2025

Abstract
This work aimed to investigate the effect of alternative non-gluten flours of taro, banana, and sweet potato on the sensory quality and physicochemical profile of gluten-free muffins. The physical characteristics such as texture and water content were also investigated since this parameter will impact the sensory properties of the muffin and influence liking significantly. There were four samples developed in this study including the use of wheat flour (control, gluten version), taro flour, taro-banana flour, and taro-sweet potato flour. The consumer acceptability was conducted by involving 60 consumers (mean age 21.2 ± 4.3) to evaluate liking using a 9-point-hedonic scale. The result shows that the muffin made from taro flour has a significantly higher moisture content (p= 0.030) and is characterized by the most hard texture (p<0.001). However, the muffin made from taro flour was significantly less liked in terms of texture and overall acceptability as compared to the wheat sample. The muffin made from taro-sweet potato was shown to be liked at the same level as the muffin made from what showcased the same level of acceptability. This study exhibits the potential and application of taro, banana, and sweet potato flour in developing gluten-free muffins for healthy snack alternatives.
Morphology of palm sugar trees (Arenga pinnata) at the various topography in South Sulawesi
Authors: Syahidah  , Soma Andang Suryana , Makkarennu  , Taskirawati Ira , Chairil  , Akbar Muhammad Fagil , Sulkifli  , Parasita Nur Rezy , Deradjat Muh. Ilham , Utama Aufar Rifky , Rachmat Ramadhan Muhammad Dandy 
Published: February 2025

Abstract
The palm sugar plant (Arenga pinnata) is versatile because all plant parts can be utilized. This plant also can grow in various soil conditions, except in acidic soils. The topography conditions of the area will affect palm sugar characteristics. This study aims to analyze the morphology of palm sugar based on the topography conditions of various areas in South Sulawesi Province. The research was carried out by analyzing the morphology of palm sugar with the topography conditions in each research area. The research results show that the growth in the four research areas has different morphologies, with the palm sugar tree growing in Bone Regency having the highest growth. Moreover, the diameter of the tapped inflorescence of palm trees growing in Sinjai Regency is the biggest. Regarding the topography conditions of the area of research, in general, they have met the growing requirements for palm sugar. Thus, it can be concluded that the different morphologies of palm sugar in the field of research are influenced not only by the region’s topography condition but also by other factors that are not specified yet in this study.
The Influence of Cinnamon Powder from Cinnamomum burmannii bark on quality and storage period of liquid sugar palm (Arenga longipes Mogea)
Authors: Manurung Harisyah , Hakim Luthfi , Batubara Ridwanti , Syahputra Mhd. Alvi , Lubis Yunida Syafriani 
Published: February 2025

Abstract
Liquid palm sugar is produced from Arenga longipes. Liquid palm sugar is easily oxidized than contaminated by fungi and bacteria. This study aims to measure the effectiveness of powdered cinnamon in inhibiting bacterial growth and its potential as a preservative for liquid palm sugar. Making liquid area sugar is done by boiling 5 liters of tapping sap for 4 hours at 100 °C until liquid palm sugar thickens. During the boiling of the sap, cinnamon powder was added with various concentrations, namely 0%, 2%, 4%, 6%, 8%, and 10% (w/w). The results showed that the addition of cinnamon powder had no significant effect on water content, pH value and ash content. However, the addition of cinnamon powder had a very significant effect on the parameters of the water insoluble solid, and the antibacterial activity of Escherichia coli and Staphylococcus aureus. The most effective and economical results on the parameters of the anti-bacterial activity test were the addition of 2% cinnamon powder. Based on the results of this study it can be concluded that the addition of cinnamon powder can inhibit the growth of bacterial and has a longer storage period than without cinnamon powder treatment.
Analysis of the impact of halal tourism policy on the development of natural resources and the economy of local communities in the Lake Toba Region
Authors: Lumbanraja Victor , Kandias Saraan Muhammad Imanuddin , Moulita  
Published: February 2025

Abstract
The study investigates the impact of the halal tourism policy on natural resource development and the economy of local communities in the Lake Toba region, focusing on the predominantly Toba Batak population. By employing a mixed-method approach, including field observations and literature reviews, the research examines how the halal tourism policy affects local economic activities, cultural dynamics, and environmental sustainability. The findings indicate that while the halal tourism policy enhances the local economy by attracting Muslim tourists and fostering the growth of small and medium enterprises (SMEs), it also encounters resistance from the Toba Batak community due to cultural concerns. Infrastructure limitations further challenge the policy’s implementation. The study underscores the need for effective community engagement, cultural sensitivity, and infrastructure development to ensure the policy’s success. Recommendations include promoting education about halal tourism, preserving traditional cultural practices, and fostering a collaborative approach among stakeholders. This research contributes valuable insights for policymakers and practitioners to balance economic development, cultural preservation, and environmental sustainability in the Lake Toba region.
Potential of Malacca (Phyllanthus emblica L.) wood extracts as natural dyes for textiles
Authors: Risnasari Iwan , Fachrudin Khaira Amalia , Sitinjak Romario , Rangkuti Fatimah , Handoyo Agus 
Published: February 2025

Abstract
Exploration of plants in North Sumatra that have the potential to become natural textile dyes needs to be done. one of which is the Malacca plant (Phyllanthus emblica L.). The research methods used in this study include the extraction of Malacca bark and wood and its application to textiles through dyeing and eco-printing processes. The results showed that the wood bark produced a dark brown color and the wood produced a light brown color. Natural dyes from Malacca bark and wood also show good color stability against 80 times washing. indicated by the color difference value (ΔE) in the very small to medium category. Where in the ecoprint technique. aged bark has a fastness value of 4.37. young bark 2.79. aged wood 2.23. young wood 2.73 and in the dyeing technique. aged bark 3.88. young bark 3.18. aged wood 1.85. young wood 1.89. The interaction between plant parts and plant age did not significantly differ on the cokor difference value and color produced. Malacca wood and bark have antioxidant properties both in their extracts and after being applied to fabrics. Malacca plant extracts and fabrics treated with natural dyes from Malacca extracts also have antibacterial properties as indicated by the presence of an inhibition zone on bacterial growth media. Thus Malacca bark and wood have promising prospects as a source of environmentally friendly natural dyes.