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Assessment Of Bacteriological Quality And Physico-Chemical Parameters Of Domestic Water Sources In Relation To Human Health Risk In Kigamboni, Tanzania, Joseph A. Mwakosya Oct 2025

Assessment Of Bacteriological Quality And Physico-Chemical Parameters Of Domestic Water Sources In Relation To Human Health Risk In Kigamboni, Tanzania, Joseph A. Mwakosya

Tanzania Journal of Science

Data on bacteriological quality and physico-chemical parameters is crucial for protection and sustainable utilization of water resources. This study determined bacteriological quality and physico-chemical parameters of well and tap water sourcesin relation to human health risk in Kigamboni, Tanzania. Thirty water samples were collected randomly and analyzed using SPSS software. The mean values for well water samples of pH, electrical conductivity (EC), total dissolved solids (TDS), turbidity, Chloride, Sulphate, Nitrate, Phosphate, and Calcium Carbonate were 7.2, 960.27 mg/L, 528.13 mg/L, 1.52 NTU, 288.00 mg/L, 30.13 mg/L, 0.05 mg/L, 0.08 mg/L, and 160.07 mg/L, respectively. The mean values for tap water …

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Nickel (Ii) Complex Decorated Zinc-Cadmium Sulfide Type-Ii Heterojunction For Enhanced Photocatalytic Hydrogen Production, Miza Kombo, Abdul Muhamed, Suleiman Suleiman, An-Wu Xu Oct 2025

Nickel (Ii) Complex Decorated Zinc-Cadmium Sulfide Type-Ii Heterojunction For Enhanced Photocatalytic Hydrogen Production, Miza Kombo, Abdul Muhamed, Suleiman Suleiman, An-Wu Xu

Tanzania Journal of Science

The binary metal sulfide Zn0.5Cd0.5S has emerged as a promising photocatalyst for hydrogen (H2) production via visible-light-driven water splitting. However, its practical application is limited by rapid charge carrier recombination and insufficient stability. In this study, nickel (II)-(3-pyridyl) benzimidazole (NPBIm) complexes were synthesized and employed an ultrasonic-assisted method to decorate the surface of Zn0.5Cd0.5S, forming a novel metal-complex semiconductor heterostructure system (Zn0.5Cd0.5S/NPBIm). This hybrid system significantly enhances photocatalytic H2 evolution under visible light irradiation. Experimental findings reveal that the incorporation of NPBIm molecules improves the …

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Comparative Evaluation Of Dicyclohexylamine And N-Methyldiethanolamine As Corrosion Inhibitors For Top Of Line Corrosion On Api X80 Carbon Steel In Saturated Carbon Dioxide Aqueous Solutions, Frida W. Andalu, Abraham K. Temu, Alfred R. Akisanya, Joseph Yn Philip Oct 2025

Comparative Evaluation Of Dicyclohexylamine And N-Methyldiethanolamine As Corrosion Inhibitors For Top Of Line Corrosion On Api X80 Carbon Steel In Saturated Carbon Dioxide Aqueous Solutions, Frida W. Andalu, Abraham K. Temu, Alfred R. Akisanya, Joseph Yn Philip

Tanzania Journal of Science

This work has evaluated the efficiency of selected volatile corrosion inhibitors in mitigation of top of line corrosion in wet gas pipeline at different temperatures. The main challenge of top of line corrosion in carbon dioxide rich environment is the ability of the volatile corrosion inhibitor to effectively mitigate corrosion at adverse conditions. Electrochemical corrosion experiments using potentiodynamic polarization method were conducted at temperatures of 20 ℃, 35 ℃ and 45 °C to evaluate the efficiency of dicyclohexylamine and n-methyldiethanolamine corrosion inhibitors for top of line corrosion inhibition on carbon steel specimens derived from API X80 natural gas pipelines. The …

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Dynamic Lqr Control For Improved Dc Link Voltage Stability In Grid-Integrated Solar Pv System, Peter Makolo, Mwanajuma Gora, Francis Mwasilu, Jackson Justo Oct 2025

Dynamic Lqr Control For Improved Dc Link Voltage Stability In Grid-Integrated Solar Pv System, Peter Makolo, Mwanajuma Gora, Francis Mwasilu, Jackson Justo

Tanzania Journal of Science

The integration of photovoltaic (PV) systems into power grids poses a significant challenge to voltage stability, especially at the DC link. Fluctuations in solar irradiance directly cause power variations and instability in this critical interface. If not properly controlled, this variability can lead to inefficiencies, equipment damage, and widespread grid disturbances. To address the abovementioned challenge, this paper proposes a dynamic converter control strategy designed to enhance DC link voltage stability in grid-integrated solar PV system. The core of the proposed control system is based on a Linear Quadratic Regulator (LQR) mechanism, implemented within a two-stage, PV grid connected system …

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Prevalence And Molecular Characterization Of Non-Typhoidal Salmonella In Poultry Of Dar Es Salaam, Tanzania, Tumwi T. Salah, Paulo S. Joseph, Bishop I. Magidanga, Richard S. Mwakapuja, Victor A. Makene Oct 2025

Prevalence And Molecular Characterization Of Non-Typhoidal Salmonella In Poultry Of Dar Es Salaam, Tanzania, Tumwi T. Salah, Paulo S. Joseph, Bishop I. Magidanga, Richard S. Mwakapuja, Victor A. Makene

Tanzania Journal of Science

Poultry is one of the common source of non-typhoidal Salmonella and poultry products are the major sources of human and animal infections with the Salmonella. A cross-sectional study was conducted to determine the prevalence of non-typhoidal Salmonella in live commercial and backyard chickens from retail markets and farms in Dar es Salaam city, Tanzania. The study was conducted in four districts; Ubungo, Kinondoni, Temeke and Ilala. A total of 400 chickens (120 broilers, 120 layers and 160 backyard chickens) were tested for Salmonella. Salmonella isolation and identification was carried out using bacteriological standard methods and polymerase chain reaction (PCR) …

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Comparative Study On The Application Of Gra, Psi And Hybrid Psi-Gra Techniques For Optimising Turning Parameters In Multi-Criteria Problems, Mussa Iddi Mgwatu Oct 2025

Comparative Study On The Application Of Gra, Psi And Hybrid Psi-Gra Techniques For Optimising Turning Parameters In Multi-Criteria Problems, Mussa Iddi Mgwatu

Tanzania Journal of Science

The optimum turning parameters help to justify the investment in machine tools for manufacturing industries. However, solving optimisation models to achieve optimum turning parameters in multi-criteria environment is complex leading to the application of multi-criteria decision-making techniques. This paper compares three multi-criteria decision-making techniques in determining optimum turning process parameters namely spindle speed, feed rate and depth of cut. The performance criteria are material removal rate, consumed electrical energy and tool wear rate. Example data for turning process were obtained from other studies while the analyses for multi-criteria decision-making were performed using grey relational analysis (GRA), preference selection index (PSI) …

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Heavy Metal Contamination And Health Risks In Katoro's Artisanal Gold Mining Soils, Tanzania, Innocent J. Lugendo, Venance Mwesiga Oct 2025

Heavy Metal Contamination And Health Risks In Katoro's Artisanal Gold Mining Soils, Tanzania, Innocent J. Lugendo, Venance Mwesiga

Tanzania Journal of Science

This study assessed heavy metal contamination in surface soils from artisanal gold mining areas in Katoro, Tanzania, evaluating ecological and human health risks. Thirty-six soil samples were systematically collected from three mining villages (Bingwa, Isenye, and CCM) at varying distances ranging from 30 to 90 m from active mining pits alongside twelve control samples from a non-mining area for comparison purposes. Concentrations of Cr, Cu, Ni, Zn, Pb, and As in soil samples were analyzed using energy-dispersive X-ray fluorescence spectrometry (EDXRF). Results revealed severe contamination, with Cr (117–1255 mg/kg), Cu (81–104 mg/kg), and Ni (89–271 mg/kg) exceeding permissible limits. The …

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Morphological And Biochemical Characterization Of Endophytic Bacteria From Selected Medicinal Plants Found At The University Of Dar Es Salaam, Tanzania, Ibrahim Juma Oct 2025

Morphological And Biochemical Characterization Of Endophytic Bacteria From Selected Medicinal Plants Found At The University Of Dar Es Salaam, Tanzania, Ibrahim Juma

Tanzania Journal of Science

Endophytic bacteria are capable of colonising internal tissues of medicinal plants, and producing secondary metabolites (biochemical compounds) of beneficial importance like the ones produced by their host plants. Though Tanzania harbours a wide species of medicinal plants with endophytic bacteria capable of producing such important bioactive substances, research on these bacteria remains scant, which limit their biotechnological applications. This work was undertaken to isolate and document endophytic bacteria from tropical almond, local avocado, banana and blue snake weed plants found at the University of Dar es Salaam, main campus. The study characterised the isolated endophytes based on morphological descriptors and …

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Spatio-Temporal Dynamics Of The Onset And Cessation Of Ond Rainy Season Across Bimodal Regions Of Tanzania, Rajabu J. Mangara, Paul Ts Limbu Oct 2025

Spatio-Temporal Dynamics Of The Onset And Cessation Of Ond Rainy Season Across Bimodal Regions Of Tanzania, Rajabu J. Mangara, Paul Ts Limbu

Tanzania Journal of Science

This study investigates the temporal variability of the onset, cessation, and duration of the October-November-December (OND) rainy season in the bimodal rainfall region of Tanzania. Utilizing daily precipitation data from the Multi-Source Weighted-Ensemble Precipitation dataset for the period 2014–2023, the study employs the Accumulated Daily Index method to determine the onset and cessation of rains, with the seasonal duration computed as the difference between these dates. Variability in onset, cessation, and season length was quantified using the Coefficient of Variation. The findings highlight significant spatial variability in onset, with early rains in northwestern areas (e.g., Bukoba) and coastal zones, commencing …

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Crude Extracts Of Seaweeds (Ulva Lactuca And Eucheuma Spinosum) As Biostimulants For Enhancing Sweet Pepper Production, Charles Olambo Joseph, Seif Amour M Oct 2025

Crude Extracts Of Seaweeds (Ulva Lactuca And Eucheuma Spinosum) As Biostimulants For Enhancing Sweet Pepper Production, Charles Olambo Joseph, Seif Amour M

Tanzania Journal of Science

Sweet pepper is the world’s second most important vegetable after tomato, making its production vital for economic growth and supporting livelihoods. However, growing concerns about environmental protection and sustainability make the search for eco‑friendly alternatives to synthetic fertilizers inevitable. Seaweed extracts are rich in bioactive compounds that can stimulate key plant growth and defense pathways making them effective biofertilizer. A Randomized Complete Block Design was laid out to evaluate the potential of seaweed extract (U. lactuca and E. spinosum) in promoting the growth and productivity of sweet pepper(Capsicum annuum L.). Seaweed was applied in both liquid and …

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Academic Policies Committee Minutes Of The Academic Senate 2025-10-28, University Of Dayton. Academic Senate. Academic Policies Committee Oct 2025

Academic Policies Committee Minutes Of The Academic Senate 2025-10-28, University Of Dayton. Academic Senate. Academic Policies Committee

All Committee Minutes

Approved minutes of a meeting of the Academic Policies Committee of the Academic Senate of the University of Dayton

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Unh Named To Princeton Review's Top 50 Green Colleges List, Unh Communications And Public Affairs Oct 2025

Unh Named To Princeton Review's Top 50 Green Colleges List, Unh Communications And Public Affairs

UNH Today Archive

No abstract provided.

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Invisible Print? Reading Skill Predicts Children's Learning Of Novel Spoken Words, Taylor J. Bryant, Dawna Duff, Bethany Bell, Lisa Fitton, Suzanne M. Adlof Oct 2025

Invisible Print? Reading Skill Predicts Children's Learning Of Novel Spoken Words, Taylor J. Bryant, Dawna Duff, Bethany Bell, Lisa Fitton, Suzanne M. Adlof

Faculty Publications

Research indicates that when literate children and adults hear a new word that they have never seen in print, they create an expectation for how the word may be spelled. However, studies have not yet examined the extent to which orthographic knowledge plays a role in children's spoken vocabulary learning when words are taught without print. The current study used structural equation modelling to examine the relation between children's word reading ability and their ability to learn novel words from spoken instruction. Children (N = 335; 7–9 years; 52% female; <  1% American Indian/Alaskan Native, 33% Black, 1% Multiracial, <  1% Native Hawaiian or Pacific Islander, 2% Other; 57% White; 6% did not report race; 2% Hispanic/Latino, 97% Not Hispanic/Latino; <  1% did not report ethnicity) completed norm-referenced language and reading assessments and experimental measures of spoken word learning. Word reading ability and vocabulary knowledge uniquely predicted spoken word learning with respective medium-small and medium-large effects after controlling for phonological memory, general language ability, and nonverbal cognition. Thus, orthographic skill has important effects on vocabulary learning, unaccounted for in previous research, that should be addressed in current theory and practice.

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From Listening To Action: Building Effective Community-Academic Partnerships In Environmental Health [Lightning Talk], Dani Mcbride Oct 2025

From Listening To Action: Building Effective Community-Academic Partnerships In Environmental Health [Lightning Talk], Dani Mcbride

University Faculty Publications and Creative Works

The slides from a lightning talk given at the Michigan Premier Public Health Conference in Muskegon, MI on October 28, 2025.

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Messages And Misogyny: A Creative Intervention Portraying The Embodied Experiences Of Internalized Misogyny, Margaret Janse Van Rensburg Oct 2025

Messages And Misogyny: A Creative Intervention Portraying The Embodied Experiences Of Internalized Misogyny, Margaret Janse Van Rensburg

Faculty and Staff Publications

No abstract provided.

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A New Scheme For Simple Asymmetric Bivariate Copulas And Applications, Rachid Bentoumi, Farid El Ktaibi, Christophe Chesneau Oct 2025

A New Scheme For Simple Asymmetric Bivariate Copulas And Applications, Rachid Bentoumi, Farid El Ktaibi, Christophe Chesneau

All Works

Bivariate copulas play a central role in modeling the dependence structure between two random variables and serve as a fundamental tool in various applied fields. In this article, we develop a new theoretical framework aimed at constructing simple asymmetric bivariate copulas of the form C(u, v) = uv [ϕ(v) + u(1 − ϕ(v))], (u, v) ∈ [0, 1]2. This framework relies on a tuning univariate function to achieve the desired asymmetry. We study this pioneering scheme, emphasizing its theoretical foundations, and illustrating it with several examples. More precisely, we establish important properties of the proposed copulas …

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Effect Of High-Voltage Pulsed Electric Field On The Quality Of Frozen Apple Based On Freezing Process, Duan Zhiying, Liu Jingxuan, Li Lili, Zhang Ru Oct 2025

Effect Of High-Voltage Pulsed Electric Field On The Quality Of Frozen Apple Based On Freezing Process, Duan Zhiying, Liu Jingxuan, Li Lili, Zhang Ru

Food and Machinery

[Objective] To explore the effect of high-voltage pulsed electric field (HPEF) treatment on the quality of frozen apples. [Methods] Apple samples are treated with HPEFs. Then, the freezing curve, freezing time, and microstructures of apple samples are observed to analyze the effect of HPEFs on the freezing process and cell structure of apple samples. Additionally, the texture parameters, drip loss rate, nutrient composition, and color of frozen apple samples after thawing are measured to analyze the effect of HPEFs on the quality of frozen apples and its mechanism. [Results] It is found that HPEF treatment can shorten the time to …

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Effects Of Starch Structural Changes On The Dispersibility Of Cyperus Esculentus, Sun Xiaowei, Song Chunli, Ren Jian Oct 2025

Effects Of Starch Structural Changes On The Dispersibility Of Cyperus Esculentus, Sun Xiaowei, Song Chunli, Ren Jian

Food and Machinery

[Objective] To investigate the effects of structural changes in Cyperus esculentus starch on its apparent viscosity, water absorption index, and stability, providing theoretical support for its development and application in blended powders. [Methods] C.esculentus powder was modified by three methods, i.e., ultrafine grinding, microwave treatment, and enzymatic treatment. The effects of starch structure changes caused by these modifications on powder dispersibility were analyzed. [Results] Compared with native C.esculentus powder, enzymatic treatment reduced the relative crystallinity from 43.49% to 20.69%, causing the most significant starch structure disruption and notably improving dispersibility. The apparent viscosity and stability of the powder dispersion increased …

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Path Planning Of Food Sorting Robots Based On Improved Gold Rush Optimizer, Mo Weijun, Wang Yongguang, Xu Rongli Oct 2025

Path Planning Of Food Sorting Robots Based On Improved Gold Rush Optimizer, Mo Weijun, Wang Yongguang, Xu Rongli

Food and Machinery

[Objective] To improve the path planning efficiency of multi-station food sorting robots. [Methods] A two-stage path planning method based on the improved gold rush optimizer (IGRO) was proposed. First, a two-layer planning model was constructed, incorporating the optimal grasping position at a single station and the shortest moving distance among multiple stations, with comprehensive consideration of three objectives:path length, smoothness, and safety. Second, the IGRO was designed by introducing free exploration behavior to enhance global search capability and adopting a cosine-shaped convergence factor to balance the exploration and exploitation efficiency of the algorithm. [Results] Compared with algorithms such as CRO …

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An Automatic Grading Method For Apples Based On Improved Cnn-Svm And Machine Vision, Zhang Ruiqi, Yang Ning, Zhang Yifeng Oct 2025

An Automatic Grading Method For Apples Based On Improved Cnn-Svm And Machine Vision, Zhang Ruiqi, Yang Ning, Zhang Yifeng

Food and Machinery

[Objective] To solve the problems such as poor grading accuracy and low efficiency existing in the current automatic grading methods for apples. [Methods] On the basis of the automatic grading system for apples based on machine vision, an automatic grading method combining convolutional neural network, global average pooling, batch normalization, and support vector machine is proposed for apples. Through global average pooling, the number of model parameters is reduced. The generalization ability of the model is improved by batch normalization. The Softmax classifier of the convolutional neural network is replaced by a support vector machine to improve the grading accuracy. …

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Food Automated Sorting System Integrated With Improved Yolov 11 And Dynamic Sorting Strategy, Ren Yuemei, Li Lei, Zhang Junfeng, Shang Zhanlei Oct 2025

Food Automated Sorting System Integrated With Improved Yolov 11 And Dynamic Sorting Strategy, Ren Yuemei, Li Lei, Zhang Junfeng, Shang Zhanlei

Food and Machinery

[Objective] To address the high missed detection rate and low sorting efficiency of existing food sorting system. [Methods] For an automated food sorting system based on visual inspection, a method integrating an improved YOLOv 11 model and a dynamic sorting strategy was proposed. The improved YOLOv 11 object detection model enhances the ability to identify and locate food defects. Combined with the dynamic sorting strategy, the system achieves dynamic target sorting by the robot. The improved model introduces a lightweight cross-scale feature fusion module, which enhances network efficiency by simplifying the structure and strengthening information exchange. The C 3k2 module …

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Effects Of Cold Plasma Pretreatment On Drying Characteristics And Quality Of Goji Berries, Wang Qinghui, Niu Xiaoxiao, Liu Jia, Cui Kuanbo, Yang Zhongqiang, Xiao Hongwei Oct 2025

Effects Of Cold Plasma Pretreatment On Drying Characteristics And Quality Of Goji Berries, Wang Qinghui, Niu Xiaoxiao, Liu Jia, Cui Kuanbo, Yang Zhongqiang, Xiao Hongwei

Food and Machinery

[Objective] To explore the effects of different cold plasma pretreatment conditions on the drying characteristics and quality of goji berries and determine the optimal working parameters. [Methods] Fresh goji berries are pretreated with cold plasma under different conveying speeds (0.5, 1.0, 1.5, 2.0 and 2.5 m/min). The drying time, polysaccharides, total flavonoids, total phenols, 2, 2-diphenyl-1-picrylhydrazyl (DPPH) scavenging capacity, color, and rehydration ratio are compared among different pretreatment groups. [Results] The cold plasma pretreatment improves the drying speed and shortens the drying time. The goji berries pretreated with cold plasma at the conveying speed of 1.5 m/min have the highest …

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Effect Of Ultrasonic Thawing On The Quality And Protein Oxidation Of Litopenaeus Vannamei, Peng Panpan Oct 2025

Effect Of Ultrasonic Thawing On The Quality And Protein Oxidation Of Litopenaeus Vannamei, Peng Panpan

Food and Machinery

[Objective] To improve the texture quality of frozen Litopenaeus vannamei. [Methods] Using Litopenaeus vannamei as the research object, the study systematically evaluates the effects of ultrasonic thawing (300, 400, 500 W) on the texture properties, thawing loss, cooking loss, TVB-N, TBARS values, protein oxidation (content of sulphydryl and carbonyl groups), amino acid release, pH value, and sensory evaluation of frozen shrimp. [Results] Ultrasonic thawing significantly increases the elasticity, hardness, and recovery of the frozen shrimp (P<0.05), with the 400 and 500 W ultrasonic groups showing significantly higher hardness and elasticity than the 300 W group. Ultrasonic thawing significantly reduces thawing loss, cooking loss, and TVB-N content in the frozen shrimp (P<0.05), with the 500 W ultrasonic group showing the most significant reduction. Amino acid analysis reveals that ultrasonic thawing significantly increases the total amino acid (TAA) content and the proportion of essential amino acids (EAA), with the release of essential amino acids such as leucine and glutamic acid being highest in the 300 and 400 W ultrasonic groups. The protein oxidation analysis shows that the sulphydryl content in the ultrasonic-thawed group was significantly higher than that in the room-temperature thawed group, while the carbonyl content was significantly lower. Sensory evaluation results indicated that the overall score of the ultrasonic-thawed group is significantly higher than that |of the room-temperature thawed group, with the 400 W ultrasonic group achieving the highest sensory score. Pearson correlation analysis indicates that the thawing loss of frozen shrimp is negatively correlated with elasticity and hardness (P<0.05), and positively correlated with TVB-N, TBARS values, and carbonyl content (P<0.05). TVB-N is negatively correlated with hardness, elasticity, and recovery (P<0.05), and positively correlated with TBARS values and carbonyl content (P<0.05). [Conclusion] Ultrasonic thawing improves the texture quality of frozen shrimp compared to room-temperature thawing and effectively inhibits lipid and protein oxidation during the thawing process, with 400 W ultrasonic thawing being the most suitable.

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Numerical Simulation And Experimental Study Of A Large Fruit And Vegetable Elevated Warehouse, Shi Lin, Guo Kai, Xie Jing, Li Qingcai, Qiao Junyu Oct 2025

Numerical Simulation And Experimental Study Of A Large Fruit And Vegetable Elevated Warehouse, Shi Lin, Guo Kai, Xie Jing, Li Qingcai, Qiao Junyu

Food and Machinery

[Objective] To investigate the air flow organization and temperature distribution inside a large fruit and vegetable elevated warehouse and analyze the formation mechanism. [Methods] Experimental measurement and CFD numerical simulation are performed to analyze the actual air distribution inside a large fruit and vegetable elevated warehouse. [Results] The average temperature of the horizontal plane in the loading area decreases with the decrease in height. The maximum average temperatures of the upper (H=12.3 m), middle (H=7.3 m), and lower (H=2.3 m) layers are 3.05 ℃, 2.86 ℃, and 2.31 ℃, respectively. The temperature differences between the upper and middle layers and …

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Ameliorating Effect Of Haematococcus Pluvialis Powder On Lps-Induced Barrier Damage In Hok Cells, Xie Jinmei, Chen Cailian, Zhang Yong, Zheng Yunjian, Xie Xi Oct 2025

Ameliorating Effect Of Haematococcus Pluvialis Powder On Lps-Induced Barrier Damage In Hok Cells, Xie Jinmei, Chen Cailian, Zhang Yong, Zheng Yunjian, Xie Xi

Food and Machinery

[Objective] To investigate the protective effect of Haematococcus pluvialis (H.pluvialis) powder on lipopolysaccharide (LPS)-induced oral epithelial damage. [Methods] The effects of different doses of H.pluvialis on the viability of human oral keratinocytes (HOKs) were assessed. In LPS-induced HOKs, changes in the tight junction-associated proteins ZO-1 and Occludin, mitochondrial morphology, reactive oxygen species (ROS), mitochondrial membrane potential (MMP), mitochondrial superoxide (MitoSOX), and mitochondrial permeability transition pore (MPTP) were evaluated. [Results] Compared with the LPS model group, high-dose H.pluvialis significantly upregulated the expression levels of Occludin and ZO-1 to 151.56% and 170.52%, respectively (P < 0.05), and promoted their membrane localization. In addition, H.pluvialis markedly improved LPS-induced excessive ROS and MitoSOX production, the reduction in MMP, and the increase in MPTP in HOKs. [Conclusion] H.pluvialis may alleviate LPS-induced barrier damage in HOKs by improving mitochondrial dysfunction and reducing oxidative stress, suggesting its potential as a functional food for oral mucosal barrier repair.

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Optimization Of Extraction And Purification Process Of Polyphenols From Prunus Cerasifera Ehrhart And Analysis Of Their Antioxidant Activity, Ayijia Malike, Salamet Adirs, Tajiguli Abulikemu, Atawula Tiemuer, Gulfira Ylham, Nigereyi Yadikaer Oct 2025

Optimization Of Extraction And Purification Process Of Polyphenols From Prunus Cerasifera Ehrhart And Analysis Of Their Antioxidant Activity, Ayijia Malike, Salamet Adirs, Tajiguli Abulikemu, Atawula Tiemuer, Gulfira Ylham, Nigereyi Yadikaer

Food and Machinery

[Objective] Using the fruits of Prunus cerasifera as raw materials, this study aimed to optimize the preparation process of polyphenols and evaluate their antioxidant activity. [Methods] The optimal extraction conditions for polyphenols from P.cerasifera were determined using ultrasound-assisted compound enzyme extraction, optimized through single-factor experiments and a Box-Behnken response surface design. Macroporous adsorption resin was employed for the enrichment and purification of the polyphenols. The DPPH radical scavenging ability, ABTS ⁺ radical scavenging ability, and total antioxidant capacity of the polyphenols before and after purification were evaluated. [Results] The optimal extraction conditions were as follows:pectinase to cellulase mass ratio of …

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Extraction Process Optimization Of Alcohol-Soluble Proteins From Highland Barley Fermentation Spent And In Vitro Antioxidant Properties, Lyu Qian, Zhao Jie, Song Yangbo, Xu Dan, Geng Guigong, Zhang Yiquan Oct 2025

Extraction Process Optimization Of Alcohol-Soluble Proteins From Highland Barley Fermentation Spent And In Vitro Antioxidant Properties, Lyu Qian, Zhao Jie, Song Yangbo, Xu Dan, Geng Guigong, Zhang Yiquan

Food and Machinery

[Objective] To optimize the extraction process of alcohol-soluble proteins from highland barley fermentation spent, aiming to enhance the added value of byproducts from highland barley wine processing. [Methods] The alcohol-soluble proteins were extracted from highland barley fermentation spent using ultrasound-assisted ethanol extraction. The yield of alcohol-soluble proteins was used as the evaluation index to analyze the effects of four factors, i.e., solid-to-liquid ratio, ultrasound temperature, ultrasound power, and ultrasound time, on the protein yield. An orthogonal test was conducted to optimize the extraction process and determine the optimal extraction conditions. SDS-PAGE analysis was performed to examine the relative molecular mass …

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Effects Of Different Drying Methods On Drying Characteristics And Quality Of Taro Strips, Li Xiaoyun, Xie Ronghua, Chen Sheng, Han Chunyang, Chen Junliang, Ren Aiqing, Duan Zhenhua Oct 2025

Effects Of Different Drying Methods On Drying Characteristics And Quality Of Taro Strips, Li Xiaoyun, Xie Ronghua, Chen Sheng, Han Chunyang, Chen Junliang, Ren Aiqing, Duan Zhenhua

Food and Machinery

[Objective] To reduce postharvest spoilage of taro and improve the drying quality of taro strips. [Methods] Four drying methods, i.e., vacuum microwave drying (VMD), hot air drying (HAD), heat pump drying (HPD), and far-infrared radiation drying (FIRD), were used to analyze their effects on the drying characteristics, physical properties (rehydration ratio, hardness, and color difference), moisture migration and distribution, and microstructure of taro strips. [Results] In terms of drying efficiency, VMD demonstrated the shortest free water removal time, followed by HAD and HPD. For color performance, the L* value followed the order HAD >HPD >FIRD >VMD. In terms of hardness, …

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Effects Of Auricularia Auricula Polysaccharides On Its Rehydration Characteristics, Su Xin, Lu Huiwei, Liu Zhou, Chai Zhenyu Oct 2025

Effects Of Auricularia Auricula Polysaccharides On Its Rehydration Characteristics, Su Xin, Lu Huiwei, Liu Zhou, Chai Zhenyu

Food and Machinery

[Objective] To explore the effects of Auricularia auricula polysaccharides on its rehydration characteristics. [Methods] Auricularia auricula polysaccharides are extracted by the hot water-ultrasonic-assisted extraction method. The polysaccharide-removed Auricularia auricula residue is dried to a constant weight and rehydrated. Then, the water content, swelling, rehydration ratio, texture characteristics, and water distribution state of the rehydrated Auricularia auricula are determined to explore the effects of Auricularia auricula polysaccharide content on its rehydration characteristics. [Results] The crushing degree of Auricularia auricula is proportional to the polysaccharide removal rate. Compared with Auricularia auricula and polysaccharide-removed Auricularia auricula of 20~16 mesh, the polysaccharide-removed Auricularia auricula …

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Optimization Strategies For Nucleic Acid Aptamer Sequences And Its Application In The Detection Of Food Hazards, Yuan Jie, Yao Jun, Zhang Sicheng, Qin Yadi Oct 2025

Optimization Strategies For Nucleic Acid Aptamer Sequences And Its Application In The Detection Of Food Hazards, Yuan Jie, Yao Jun, Zhang Sicheng, Qin Yadi

Food and Machinery

Foodborne diseases have become a prominent problem in the field of food safety. Rapid and accurate detection of food hazards is a key step in controlling foodborne diseases. As a novel biological recognition molecule, nucleic acid aptamers have become a research hotspot for constructing rapid and sensitive biosensors for the detection of food hazards. However, the affinity and selectivity of aptamers screened by Systematic Evolution of Ligands by Exponential Enrichment (SELEX) still need improvement to fully meet the requirements of analytical detection. This paper analyzes the intrinsic factors affecting aptamer performance, focuses on optimization strategies for nucleic acid aptamers, introduces …

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