Potential Resource Research Articles

Surface complexation of rare earth elements on goethite in sea-floor hydrothermal environment: Insight from first principles simulations

Deep-sea mud shows tremendous resource potential for rare earth elements (REEs) and its formation is closely associated with sea-floor hydrothermal activities. Iron (oxyhydr)oxides link the sources and sinks of REEs in sea-floor hydrothermal systems. However, the complexation mechanisms of REEs on iron (oxyhydr)oxides have not been well understood yet. In this study, by using the first principles molecular dynamics technique, we first calculated the pKa’s of surface groups on goethite (110) surface at elevated temperatures relevant to sea-floor hydrothermal systems and then evaluated the complexation structures and free energies of REEs on goethite (110) and (010) surfaces using the method of constraint by taking Sc3+, Y3+, and La3+ as model REE cations. The results show that REE complexation occurs in mildly acidic to neutral conditions. The most thermodynamically stable complexes of REEs are bidentate complexes on two neighboring FeOH sites on goethite (110) surface and tridentate complexes on two neighboring FeOH sites plus one Fe2OH site on goethite (010) surface. Sc3+ complexes match the goethite lattice and can be incorporated into the lattice. The stabilities of REE complexes increase with the distance from hydrothermal vents. Complexation of Y3+ is less favored on goethite compared to other REEs whereas Sc3+ prefers complexation on goethite (010) surface and La3+ exhibits similar stabilities on both (010) and (110) surfaces. The derived atomic level complexation mechanisms would be helpful for the interpretation of experimental data and the prediction of REEs’ behavior in the sea-floor. The findings presented here provide valuable insights into REEs fractionation and enrichment in deep-sea muds.

Catch and characteristics of Decapterus sp. fishing areas in The Southern Waters of East Java - Bali

Abstract One of the essential potential resources of small pelagic fish to the livelihood of fishermen is Decapterus sp. The purpose of this study was to examine the catch and features of the Decapterus sp fishing region in Indian Ocean waters from East Java to Bali. The fisheries data for Decapterus sp during 2019 - 2021 were provided by Ministry of Maritime Affairs and Fisheries, Republic of Indonesia. The chl-a, and SST data were downloaded from Copernicus Marine Environment Monitoring Service (https://marine.copernicus.eu/). The fisheries and environmental data were then grouped by season. The results showed that the highest catch per unit efforts (CPUE) value occurred during transition 2 season with value of 2.89 followed by west season with value of 2.65. The smallest value of CPUE occurred during transition 1 (1.98). In general, most of Decapterus sp were caught in SST range between 27 – 29°C and chl-a range between 0.1 – 0.3 mg/m3. These results can be used as a basis for management of Decapterus sp especially in southern waters of East Java - Bali.

Depside and depsidone-rich hydroalcoholic extract, resourced from the lichen Parmelinella wallichiana (Taylor) Elix & Hale selectively restricts Non-Small Cell Lung Cancer by modulating p53, FOXO1 and PALLADIN genes

The non-specificity of contemporary cancer therapeutics has enticed us to develop safer, anticancer alternatives from natural resources. Lichens are unique natural entities which have long been neglected for explorations in cancer therapy, despite their vast potential. Our present study aims to investigate the anti-cancer potential of a wild lichen Parmelinella wallichiana. The anti-proliferative efficacy of the lichen extracts were screened through MTT assay against a panel of cell lines and the potent hydroalcoholic extract was selected for further evaluation against the most sensitive lung-cancer cell line A549 by implementing a wide range of microscopic and flow cytometric applications. The observations suggest that the extract could selectively induce apoptosis by augmenting ROS and disrupting the mitochondrial membrane potentiality. It was also found that the lichen-induced apoptosis was regulated by two crucial tumor suppressor genes, FOXO1, and p53, along with cell cycle inhibitor p21 which ultimately resulted in robust apoptosis through the up-regulation of pro-apoptotic BAX expression. Moreover, the extract also restricted the cancer progression by down-regulating the PALLADIN expression. Further, an LC-MS-based metabolomic profile highlighted a number of depsides, depsidones and dibenzofurans, which included atranorin, physodalic acid, salazinic acid, constictic acid and usnic acid. Then, an in silico docking with these lichen-derived metabolites against the PI3Kα receptor predicted these compounds has a binding affinity close to a standard PI3Kα inhibitor copanlisib. The study concludes that the extract restricts lung cancer possibly through the PI3Kα/FOXO1 axis and thus Parmelinella wallichiana represents a potential resource for anti-lung cancer drug development in future.

Antimicrobial and Cytotoxic Effect of Bornetella Nitida Green Algae Isolate on MCF-7 Breast Cancer.

Marine algae are increasingly becoming a potential resource for new drugs. In recent decades, including Bornetella nitida (B. nitida). Meanwhile, antimicrobial and anticancer agents are the first line of choice for developing alternative compounds, considering the annually increasing resistant events. Therefore, this study aimed to examine the antimicrobial and cytotoxic potential of B. nitida isolate compounds. The B. nitida resulted in 2 compounds, sitosterol 3β tetracosanoate and (E)-17-(8-ethyl-4,5,9-trimethyldec-6-en-2-yl)-13-methyl-2,3,4,7,8,9,10,11,12,13,14,15,16,17-tetradecahydro-1H-cyclopenta[a]phenanthren-3-ol. Both compounds were tested to have antibacterial effects against Pseudomonas aeruginosa, Bacillus subtilis, Staphylococcus aureus, Methicillin-resistant Staphylococcus Aureus (MRSA). Proliferation assay was conducted using the PrestoBlue™ Cell Viability Reagent, which was also used to measure the IC50 against MCF-7 breast cancer cells. The results showed that (E)-17-(8-ethyl-4,5,9-trimethyldec-6-en-2-yl)-13-methyl-2,3,4,7,8,9,10,11,12,13,14,15,16,17-tetradecahydro-1H-cyclopenta[a]phenanthren-3-ol had antimicrobial activity against Staphylococcus aureus and IC50 value of 142.18 µg/mL against MCF-7 cells, while sitosterol 3β tetracosanoate does not have any antimicrobial activity and IC50 value of 681.65 µg/mL. Moreover, the mechanism prediction using docking with caspase-3 receptor to induce apoptosis was also evaluated. Based on the results, (E)-17-(8-ethyl-4,5,9-trimethyldec-6-en-2-yl)-13-methyl-2,3,4,7,8,9,10,11,12,13,14,15,16,17-tetradecahydro-1H-cyclopenta[a]phenanthren-3-ol of B. nitida has great potential as an antimicrobial and anticancer agent.

Educational Supervision at SMP Negeri 58 Palembang

Improving the quality and relevance of education is the most important challenge in educational development. The centralization of administrative and educational management has resulted in the underdevelopment of regional capacity in regulating and managing various educational affairs in each region. One of the most important educational facilities is school. Teachers are human resources who need to continue to be promoted and developed as teaching staff. The potential of teacher resources must continue to be developed so that teachers can carry out their duties professionally. The aim of this article is to understand the educational supervision at SMP Negeri 58 Palembang. This article used a qualitative method with a descriptive approach. Because it is descriptive, the findings of this research will be consulted with theories and previous research results. The results stated educational supervision is needed to monitor and improve the teacher’s teaching and learning process. Educational supervision has a main function which is aimed at improving and increasing the quality of teaching.

Reflectance spectroscopy analysis and lithium content estimation in lithium-rich rocks and stream sediments: Insights from Tuanjie Peak, Western Kunlun, China

Lithium, a rare metal of strategic importance, has garnered heightened global attention. This investigation delves into the laboratory visible-near infrared and short-wavelength infrared reflectance (VNIR-SWIR 350 nm–2500 nm) spectral properties of lithium-rich rocks and stream sediments, aiming to elucidate their quantitative relationship with lithium concentration. This research seeks to pave new avenues and furnish innovative technical solutions for probing sedimentary lithium reserves. Conducted in the Tuanjie Peak region of Western Kunlun, Xinjiang, China, this study analyzed 614 stream sediments and 222 rock specimens. Initial steps included laboratory VNIR-SWIR spectral reflectance measurements and lithium quantification. Following the preprocessing of spectral data via Savitzky-Golay (SG) smoothing and continuum removal (CR), the absorption positions (Pos2210nm, Pos1910nm) and depths (Depth2210, Depth1910) in the rock spectra, as well as the Illite Spectral Maturity (ISM) of the rock samples, were extracted. Employing both the Successive Projections Algorithm (SPA) and genetic algorithm (GA), wavelengths indicative of lithium content were identified. Integrating the lithium-sensitive wavelengths identified by these feature selection methods, A quantitative predictive regression model for lithium content in rock and stream sediments was developed using partial least squares regression (PLSR), support vector regression (SVR), and convolutional neural network (CNN). Spectral analysis indicated that lithium is predominantly found in montmorillonite and illite, with its content positively correlating with the spectral maturity of illite and closely related to Al-OH absorption depth (Depth2210) and clay content. The SPA algorithm was more effective than GA in extracting lithium-sensitive bands. The optimal regression model for quantitative prediction of lithium content in rock samples was SG-SPA-CNN, with a correlation coefficient prediction (Rp) of 0.924 and root-mean-square error prediction (RMSEP) of 0.112. The optimal model for the prediction of lithium content in stream sediment was SG-SPA-CNN, with an Rp and RMSEP of 0.881 and 0.296, respectively. The higher prediction accuracy for lithium content in rocks compared to sediments indicates that rocks are a more suitable medium for predicting lithium content. Compared to the PLSR and SVR models, the CNN model performs better in both sample types. Despite the limitations, this study highlights the effectiveness of hyperspectral technology in exploring the potential of clay-type lithium resources in the Tuanjie Peak area, offering new perspectives and approaches for further exploration.

Flowering phenology patterns promotes pollination facilitation in coexisting Anthurium species from a mountain forest in Colombia

AbstractCo-flowering congeneric plant species may either experience competition for the services of shared pollinators or facilitation when together, they attract a higher number and diversity of pollinators. In this study, we evaluate whether temporal segregation in flowering time and temporal partition of shared pollinators operate among sympatric Anthurium species as mechanisms to reduce competition to attract potential pollinators. We investigated flowering phenology, the intra-e interspecific synchrony, and the composition of the flower visitor community of seven coexisting Anthurium species biweekly for a whole year in Native and Pine forests. We also analyzed the structure of Anthurium -flower visitor networks and the functional role of species. Flowering was continuous thorough the year for most Anthurium species, but their flowering peaks were segregated significantly in time. Although the flowering periods of these species overlapped, flower visitor communities were very dissimilar among Anthurium species, sharing only a tiny fraction of insects that function as connectors among species in the network. The partition of potential pollinators in a fine temporal scale occurred through the rewiring of shared flower visitors to the most abundant flowering Anthurium species. On the other hand, a high number of inflorescences attracted larger abundance and richness of insect visitors. Facilitation occurred almost throughout the year, while competition occurred during the flowering peak, where a particular species was the best competitor increasing the constancy of pollinators. This study highlights the role of facilitation and competition as mechanisms that together shape the use of potential pollinator resources between sympatric congeneric plant species.

Metacognitive Abilities and Socio-Psychological Adaptation of People of Mature Age: Features of Relationships

The analysis is aimed at determining characteristics of relationships between metacognitive abilities and socio-psychological adaptation in homogeneous cluster groups represented by people of mature age. The main research methods were: cluster analysis, which allows us to identify relatively homogeneous groups; “bootstrap” method to check the normality of the distribution. The study also used factor analysis to determine the relationship between the characteristics of metacognitive abilities and socio-psychological adaptation. The total following variance in the factor models (86.24%, 99.77%, and 100%) as well as the levels of predictive consistency (p≤0.01 to p≤0.05) reflect the reliability and significance of the results obtained. Data processing and interpretation were carried out using qualitative and quantitative statistical methods: Fisher’s angular transformation criterion (φ*) for comparing two samples according to the occurrence frequency of the effect which is interesting to the researcher; Kruskal-Wallis rank sum test (IBM SPSS Statistics).The results of the study allow us to talk about ambivalence in the manifestation of metacognitive abilities formation in people of mature age: on the one hand, a general tendency towards a decrease in the development of metacognitive abilities was discovered, on the other hand, an increase in the degree of structural organization of the entire metacognitive system was revealed in the process of growing up, which generally compensates for the natural decline of potential resource capabilities of adults. This ambiguity in the manifestation of metacognitive abilities is reflected in their relationship with indicators of socio-psychological adaptation of adults. The identified features of the relationship in terms of harmony/inconsistency, integrity, and the content of crystallizing factors generally indicate a multidimensional structure of the relationship between metacognitive abilities and socio-psychological adaptation, when only in some cases can we talk about a direct correlation of these variables: a high level of development of metacognitive abilities determines high social-psychological adaptation.

Prospects for the allocation of Paleorousels in the subsalt complex of the south-east of the Caspian sedimentary basin

development and features of the formation of the sedimentary complex of the south of the Caspian sedimentary basin are presented. The complex geological structure of the region is mainly due to the influence of tectonic, volcanic and denudation processes on sedimentation. The introduction of terrigenous material deep into the sedimentary basin (Matken-Ushmolinsk, Biikzhal and South Embin zones) by paleorubic flows contributed to the emergence of accumulative shafts and interbranch uplifts composed mainly of clay rocks with alternating siltstone-sandstones. In the paleorusls themselves, coarser sediments were deposited – gravelites and sandstones. The reconstruction of the conditions of formation of sand bodies made it possible to predict their facies composition, morphology and identify patterns of spatial placement, and are also of great interest in the search for oil and gas deposits in deep-lying lithological traps. The prospects of these structures and their resource potential are evidenced by the world experience in identifying large deposits of hydrocarbon raw materials. This is a new highly promising direction of large accumulations of hydrocarbons for the Caspian Basin. The results of drilling deep wells conducted in recent years have made it possible to refine the internal structure, substantiate new facilities in the Late Paleozoic sedimentary complex, and reassess the prospects of oil and gas potential and forecast oil and gas resources of the south of the Caspian Basin.

Building Community Participation in the Development of Warloka Pesisir Village as a Modern Fishing Village in West Manggarai

Community participation is essential in developing tourism villages because the potential of social and cultural diversity resources in the community is the primary driving force behind the activities in the tourism village. This research aims to analyze the stages and obstacles of community participation in the development of Warloka Pesisir Tourism Village. This research uses qualitative research with descriptive research type. Data were gathered using observation, interviews, focus group discussion impacts (FGDs), and documentation. The concept used to analyze the data is the concept of participation from Cohen and Uphoff. The results showed that based on the four types of participation, the Warloka Pesisir community has not yet reached an optimal level of participation in developing a tourism village. Participation in decision-making and benefit-taking shows that the community is passive in decision-making and tends only to follow the final decision. This has an impact on the community's lack of maximum benefits from the development of tourist villages. Some existing obstacles hinder participation and tourism development, so more attention must be paid to supporting community participation by updating infrastructure and developing skills with empowerment.

Эффективность биопрепаратов при выращивании томата открытого грунта

The problem of regulating the growth and development of plants with the help of physio-logically active substances that have both growth-regulating, anti-stress and immune-stimulating effects in the system of other elements of technology is one of the most pressing in modern biol-ogy, the realization of their biological resource and productive potential. Research has shown that the biostimulants used in the experiment, Isabion and Benefit, had different effects on the survival rate of seedlings of the studied tomato hybrid Semko 98, biometric indicators of plants, yield and quality of marketable fruits. Keywords: SEEDLING SURVIVAL, BIOMETRIC INDICATORS, DEGREE OF FUSARIOSIS DE-VELOPMENT, FRUIT MARKETABILITY

An AP2/ERF transcription factor confers chilling tolerance in rice.

Cold stress, a prominent adverse environmental factor, severely hinders rice growth and productivity. Unraveling the complex mechanisms governing chilling tolerance in rice is crucial for molecular breeding of cold-tolerant varieties. Here, we identify an APETALA2/Ethylene Responsive Factor (AP2/ERF) transcription factor, OsERF52, as a positive modulator in response to low temperatures. OsERF52 directly regulates the expression of C-Repeat Binding Factor (CBF) genes in rice. In addition, Osmotic Stress/ABA-Activated Protein Kinase 9-mediated phosphorylation of OsERF52 at S261 enhances its stability and interaction with Ideal Plant Architecture 1 and OsbHLH002/OsICE1. This collaborative activation leads to the expression of OsCBFs, thereby initiating the chilling response in rice. Notably, plants with base-edited OsERF52S261D-3HA exhibit enhanced chilling resistance without yield penalty. Our findings unveil the mechanism orchestrated by a regulatory framework involving a protein kinase and transcription factors from diverse families, offering potential genetic resources for developing chilling-tolerant rice varieties.

A novel multi-objective decision-making model to determine optimum resource and capacity configuration for hybrid electricity generation systems: A comparative case study in Türkiye

The rapid depletion of fossil fuels, their negative environmental impacts due to harmful carbon emissions, and the drawbacks of the sole use of intermittent renewable energy resources on system reliability necessitate the use of more advanced energy system technologies. As a result, hybrid electricity generation systems offer an innovative alternative to conventional energy systems. However, the technical complexity and variability of these systems require the application of multi-objective optimization techniques to determine the optimal sizing and system design. Therefore, in this study, we suggest a multi-objective decision-making (MODM) model that involves five conflicting objectives to find the optimal resource configuration and auxiliary source capacity allocation within the framework of the multi-source electricity production method in Türkiye. The MODM model aims to maximize the utilization of resource potentials and the jobs created, while simultaneously minimizing the levelized cost of energy (LCOE), construction duration, and carbon emissions. The MODM model was solved using fmincon and fgoalattain multi-objective optimization algorithms using the Goal Attainment Method in MATLAB and the model results were subsequently compared to the real-world data. According to the model results, the optimal capacity to be allocated for the auxiliary source units is 13,749.58 MWm, while the capacity allocated according to the real-world data as of March 2024 is 2495.49 MWm. In contrast to the model's prediction of 90.8 % solar-based auxiliary unit installations, 99.8 % of auxiliary units are based on solar PV in the actual case. Furthermore, hydro or geothermal-based auxiliary sources are not allocated any capacity, which is consistent with the actual situation. The capacity allocated for the wind (primary source) + solar (auxiliary source) configuration is 76.2 %, whereas in reality, it accounts for 65.6 % of the total installations. Consequently, the model findings suggest that the maximum capacity allocation is for the wind (primary source) + solar (auxiliary source) type hybrid electricity generation system.

3D Geostatistical Modeling and Metallurgical Investigation of Cu in Tailings Deposit: Characterization and Assessment of Potential Resources

3D Geostatistical Modeling and Metallurgical Investigation of Cu in Tailings Deposit: Characterization and Assessment of Potential Resources

Urban Geothermal Resource Potential Mapping Using Data-Driven Models—A Case Study of Zhuhai City

Geothermal energy, with its promise of sustainability and a minimal environmental impact, offers a viable alternative to fossil fuels that can allow us to meet the increasing energy demands while mitigating concerns over climate change. Urban areas, with their large energy consumption, stand to benefit significantly from the integration of geothermal systems. With the growing need to harness renewable energy sources efficiently, the detection of urban subsurface resources represents a critical frontier in the pursuit of sustainability. The Guangdong Bay area, known for its abundant geothermal resources, stands at the forefront of this green energy revolution, so, in our study, we chose to evaluate Zhuhai City, which is a city representative of the resource-rich area of Guangdong. With the progress of geographic information system (GIS) technology, the land surface temperature (LST) has been used to monitor the spatial distribution characteristics of geothermal anomalies. However, relatively few studies have been conducted in the field of urban geothermal resources. In this study, we calculated the LST of Zhuhai City using Landsat 8 remote sensing data and then investigated the distributions of geothermal hot springs. Spatial data layers were constructed, including the geological structure, DEM and derivatives, lithology, and urban regions, and, based on technology with the integration of machine learning, their spatial correlations with geothermal anomalies were analyzed. The support vector machine (SVM) and the multilayer perceptron (MLP) were employed to produce maps of potential geothermal resources, and their susceptibility levels were divided into five classes: very low, low, moderate, high, and very high. Through model interpretation, we found the moderate-susceptibility class to dominate at 26.90% (SVM) and 46.27% (MLP) according to the two models. Considering the influence of artificial areas, we also corrected the original LST by identifying urban areas of thermal anomalies via the urban thermal anomaly leapfrog fusion extraction (UTALFE) method; following this augmentation, the results shifted to 24.16% (SVM) and 28.67% (MLP). Meanwhile, the area under the curve (AUC) values of all results were greater than 0.65, showing the superior performance and the high applicability of the chosen study area. This study demonstrates that data-driven models integrating thermal infrared remote sensing technology are a promising tool for the mapping of potential urban geothermal resources for further exploration. Moreover, after correction, the reclassified LST results of urban areas are more authentic and suitable for the mapping of potential geothermal resources. In the future, the method applied in this study may be considered in the exploration of more southeastern coastal cities in China.

The Derim Derim Dolerite, greater McArthur Basin, Australia: Using subsurface data to characterise a mesoproterozoic magma plumbing system

The application of high-resolution seismic reflection data has spurred major advances in knowledge of the emplacement of sub-volcanic mafic magma plumbing systems in sedimentary basins, highlighting the importance of interconnected sheet intrusions in facilitating lateral magma transport, the links between host rock mechanical properties and emplacement processes, and providing insights into how intrusive activity in basins impacts their resource potential. However, most studies have focused on Mesozoic-Cenozoic mafic magma plumbing systems situated along offshore rifted margins characterised by extensive subsurface datasets. The extensive Mesoproterozoic (c. 1300 Ma) Derim Derim Dolerite, which intrude the greater McArthur Basin in northern Australia, provide a unique opportunity to study the emplacement of a Proterozoic magma plumbing system due to its penetration by numerous hydrocarbon and mineral drillholes, in addition to seismic reflection coverage. Understanding the emplacement of this system is important because of its interactions with prospective unconventional shale reservoirs in the Velkerri and Kyalla Formations, which represent one of the world's oldest known petroleum systems. This paper focuses on characterising the intrusion emplacement and magma plumbing system using an array of subsurface data, to constrain the distribution, morphology, and emplacement mechanisms of the Derim Derim Dolerite.The morphology of the large, strata-concordant intrusions encountered at shallow present-day depths (<2 km) in the greater McArthur Basin is indicative of greater original emplacement depths of >3–4 km, suggesting a significant extent of uplift and erosion. Density-derived porosity values for the Velkerri and Kyalla Formations are anomalously low for their present-day depths, corroborating a greater palaeo-depth at time of emplacement. The extent of alteration of the host rock surrounding the Derim Derim Dolerite is highly variable, with a small number of occurrences of graphitisation of the organic matter adjacent to intrusions. However, this appears to be highly localised and the detrimental impact of the Derim Derim Dolerite on potential reservoir and/or source rocks appears generally minimal.

Evaluasi realisasi pencapaian target pajak daerah untuk penerimaan pajak daerah tahun 2020-2023 pada Badan Pendapatan Daerah Kota Manado

Taxes are one of the most potential resources and the largest contributor in maximizing regional revenue. Therefore, the government continues to try and strive to increase Regional Original Revenue (PAD) sourced from the regional tax sector. The purpose of the study is to find out the realization of the achievement of the regional tax target for regional tax revenue in 2020 - 2023 at the Regional Revenue Agency of Manado City. The analysis method used in this study is qualitative descriptive analysis. In this study, data on the realization of the tax revenue budget for regional taxes in 2020-2023 collected by the Manado City Regional Revenue Agency was used. The results of this study show that the realization of regional tax revenues for 2020 – 2023 has not yet reached the target because there are still many regional tax potentials that have not been explored. This condition is also supported by non-technical problems such as technological developments, the ineffectiveness of online tax collection applications or systems and the existence of large-scale social restrictions during the COVID-19 pandemic and also the low awareness of taxpayers in carrying out tax obligations greatly affects regional tax revenues so that the Manado City Regional Revenue Agency continues to strive to optimize regional tax collection. The efforts made by the Manado City Regional Revenue Agency to overcome problems in regional tax collection are efforts to intensify and extensify regional taxes. The results of this study show that the realization of the achievement of regional tax revenue targets in Manado City has not been optimal due to the impact of the Covid-19 pandemic so that tax collection has not been maximized which results in the non-achievement of the set target. There is only one type of regional tax that reaches the target, namely restaurant taxes in 2022-2023.

A Comprehensive Review on the Isolation, Bioactivities, and Structure-Activity Relationship of Hawthorn Pectin and Its Derived Oligosaccharides.

Hawthorn (Crataegus pinnatifida Bunge) has been highlighted as an excellent source of a variety of bioactive polymers, which has attracted increasing research interest. Pectin, as a kind of soluble dietary fiber in hawthorn, is mainly extracted by hot water extraction and ultrasonic or enzymatic hydrolysis and is then extensively used in food, pharmaceutical, and nutraceutical industries. Numerous studies have shown that hawthorn pectin and its derived oligosaccharides exhibit a wide range of biological activities, such as antioxidant activity, hypolipidemic and cholesterol-reducing effects, antimicrobial activity, and intestinal function modulatory activity. As discovered, the bioactivities of hawthorn pectin and its derived oligosaccharides were mainly contributed by structural features and chemical compositions and were highly associated with the extraction methods. Additionally, hawthorn pectin is a potential resource for the development of emulsifiers and gelling agents, food packaging films, novel foods, and traditional medicines. This review provides a comprehensive summary of current research for readers on the extraction techniques, functional characteristics, structure-activity relationship, and applications in order to provide ideas and references for the investigation and utilization of hawthorn pectin and its derived oligosaccharides. Further research and development efforts are imperative to fully explore and harness the potential of hawthorn pectin-derived oligosaccharides in the food and medicine fields.

Nitrogen recovery from biogas slurry with high ammonia nitrogen concentration through struvite precipitation utilizing acid leaching solution of collophanite tailings

ABSTRACT The high concentration of ammonia nitrogen (NH4+) and chemical oxygen demand (COD) in biogas slurry pose great challenges to the efficiency of traditional wastewater treatment systems. Collophanite tailings are solid waste, characterized by significant concentrations of phosphorus (PO43-) and magnesium (Mg2+), represent a potential resource for the reduction and recovery of NH4+ in biogas slurry via struvite precipitation. This study systematically explored the optimal leaching parameters employing sulfuric acid for the extraction of PO43− and Mg2+ from collophanite tailings. The effect of [PO43-]:[NH4+] molar ratio and pH on the recovery of NH4+ in biogas slurry was investigated. The physicochemical properties of the precipitates were confirmed using X-ray diffraction (XRD), scanning electron microscopy (SEM), and chemical analysis. Results suggested that the highest removal efficiency of NH4+ (88.5%) was achieved when employing a [PO43-]:[NH4+] molar ratio of 1.0 at pH 9.5. Evaluation of effluent quality demonstrates a significant enhancement in the biodegradability of the treated biogas slurry, evidenced by an increase in the COD/TN ratio increased from 2.1 to 10.4. Economic analysis shows that the net income would be approximately 21.33 USD/m3 for proposed produces. These findings underscore the potential of utilizing collophanite tailings for NH4+ recovery from biogas slurry.

Biochemical parameters of carob (Ceratonia siliqua L.) pods and seeds as affected by different geographical sites in Morocco

The research aimed to analyze the biochemical parameters of pods and seeds from wild carob trees across 29 different regions in Morocco. The results revealed significant differences (p ≤ 0.05) among carob provenances from different geographical sites. The seed was richer in secondary metabolites and total proteins compared to the pulp. The total sugar is 9.11 to 58.17 % in the pulp and 2.11 to 11.96 % in the seeds and the total proteins is 0.41 to 3.27 % in the pulp and 3.78 to 9.46 % in the seeds. The total phenols is 0.89 to 6.8 mg g−1 in the pulp and 1.92 to 7.64 mg g−1 in the seeds and the flavonoids is 3.71 to 21.12 mg g−1 in the pulp and 17.88 to 54.15 mg g−1 in the seeds. The condensed tannins is 0.28 to 4.8 mg g−1 in the pulp and 2.55 to 6.72 mg g−1 in the seeds. These findings indicate a promising potential for the genetic resources of Moroccan wild carob trees in future selection programs. In addition, this study presents strong evidence supporting the use of biochemical parameters to promote Moroccan carob as a primary product with promising applications in various industries, including food, cosmetics, and pharmaceuticals.