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Extraction and Characterization of Litopenaeus vannamei’s shell as potential sources of Chitosan Biopolymers

Journal of Renewable Materials 2023年第3期11卷 1181-1197页

作者： che Engku Noramalina che Engku Chik Amyra suryatie Kamaruzzan Ahmad Ideris Abdul Rahim Fathurrahman Lananan Azizah Endut siti Aslamyah Nor Azman Kasan Higher Institution Centre of Excellence(HICoE) Institute of Tropical Aquaculture and Fisheries(AKUATROP)Universiti MalaysiaTerengganuMalaysia East Coast Environmental Research Institute(EsERI) Universiti Sultan Zainal Abidin(UniSZA)Terengganu Darul ImanMalaysia Faculty of Bioresources and Food Industry Universiti Sultan Zainal Abidin(UniSZA)Terengganu Darul ImanMalaysia Faculty of Innovative Design and Technology Universiti Sultan Zainal AbidinTerengganu Darul ImanMalaysia Faculty of Marine science and Fisheries Hasanuddin UniversityMakassarIndonesia

Chitin is the second most abundant polysaccharide,produced mainly as an industrial waste stream during crustacean *** can be derived into chitosan through the deacetylation *** of shrimp waste into chitosan via the deacetylation process could be considered a practical approach for shell waste *** this study,chitosan’s physicochemical characteristics extracted from two types of pacific white leg shrimp,***’s shell(i.e.,rough and smooth),were compared with commercial *** yield,moisture,ash,solubility,water and fat binding capacity were *** degree of deacetylation(DDA)was calculated using FTIR,and their chemical structure was confirmed using XRD and *** extracted chitosan showed no significant difference in yield,moisture,ash,solubility and water binding capacity but showed a significant difference with commercial ***,the fat binding capacity of commercial chitosan showed the lowest percentage(408.34±0.83%)as compared to extracted chitosan(smooth shell 549.59±12.48%;rough shell 500.55±12.10%).The DDA indicated that extracted chitosan from the smooth and rough shell was considered good chitosan as compared to commercial chitosan with 84.08±1.27%,80.78±0.79%and 74.99±1.48%,***,the presence of hydroxyl and amino groups from FTIR and a good crystallinity index was recorded using XRD of extracted *** on observed characteristics,shrimp shell waste from *** can achieve chitosan standard quality as a biopolymer and highly potential to be applied in various industrial applications.

关键词： Chitin chitosan degree of deacetylation L.vannamei shrimp shell surface morphology

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Multi-Headed Deep Learning Models to Detect Abnormality of Alzheimer’s patients

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Computer systems science & Engineering 2023年第1期44卷 367-390页

作者： s.Meenakshi Ammal p.s.Manoharan Department of Electrical and Electronics Engineering Thiagarajar College of EngineeringMadurai625015Tamil NaduIndia

Worldwide,many elders are suffering from Alzheimer’s disease(AD).The elders with AD exhibit various abnormalities in their activities,such as sleep disturbances,wandering aimlessly,forgetting activities,etc.,which are the strong signs and symptoms of AD *** these symptoms in advance could assist to a quicker diagnosis and treatment and to prevent the progression of Disease to the next *** proposed method aims to detect the behavioral abnormalities found in Daily activities of AD patients(ADp)using *** the proposed work,a publicly available dataset collected using wearables is ***,no real-world data is available to illustrate the daily activities of ***,the proposed method has synthesized the wearables data according to the abnormal activities of *** the proposed work,multi-headed(MH)architectures such as MH Convolutional Neural Network-Long short-Term Mem-ory Network(CNN-LsTM),MH one-dimensional Convolutional Neural Network(1D-CNN)and MH two dimensional Convolutional Neural Network(2D-CNN)as well as conventional methods,namely CNN-LsTM,1D-CNN,2D-CNN have been implemented to model activity pattern.A multi-label prediction technique is applied to detect abnormal *** results obtained show that the proposed MH architectures achieve improved performance than the conventional ***,the MH models for activity recognition perform better than the abnormality detection.

关键词： Alzheimer’s disease abnormal activity detection classifier chain multi-headed CNN-LsTM wearable sensor

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Efficient piezo-assisted near-infrared-light-driven Cr(Ⅵ)reduction over Bi_(2)s_(3) nanowires transformed from ultrathin Bi_(2)WO_(6) nanosheets

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Rare Metals 2024年第9期43卷 4333-4343页

作者： Qiang Zhang Yuan-Hao cheng Wei Liu Hui-Nan che Yan-Hui Ao Key Laboratory of Integrated Regulation and Resource Development On shallow Lakes Ministry of EducationCollege of EnvironmentHohai UniversityNanjing 210098China

The utilization of piezo-photocatalytic technol ogy for environmental remediation under full spectrum solar light is promising but still ***,one dimensional Bi_(2)s_(3)nanowires,which can utilize both mechanical energy and near-infrared(NIR)light to remov hexavalent chromium(Cr(Ⅵ))efficiently,were synthe sized by a restrained growth *** reaction rat constants of Cr(Ⅵ)reduction in piezo-photocatalyti process under NIR(800–2500 nm)reached 0.334 min^(-1)which were 3.2 and 12.4 times as that of single piezo and photocatalytic *** formation of polarized electri fields and one-dimensional structure allow ultrafast sepa ration of charge carriers,thereby promoting the catalyti ***,due to the strong penetrability o NIR light,the piezo-photocatalysis performance in turbid solutions under NIR light(0.188 min^(-1))was even com parable to that under visible light(0.186 min^(-1)).Thi study provides a new concept on the development of piezo photocatalytic technology for environmental remediation by utilization of NIR light and natural mechanical energy.

关键词： piezo-photocatalysis NIR light Bi_(2)s_(3)nanowires Cr(Ⅵ)

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Experimental Investigation on Friction Welding of UNs s32205 Duplex stainless steel

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Acta Metallurgica sinica(English Letters) 2014年第6期27卷 995-1007页

作者： p. M. Ajith p. sathiya s. Aravindan Department of production Engineering National Institute of Technology Department of Mechanical Engineering Indian Institute of Technology Delhi

UNs s 32205 duplex stainless steel specimens were joined by continuous drive friction welding process. The experiments were conducted as per the Taguchi（L16 orthogonal array） method. The friction welding process parameters such as heating pressure, heating time, upsetting pressure, upsetting time, and speed of rotation were fixed with low,medium, and high levels of range based on the machine capacity, and the required knowledge was acquired from the preliminary experiments. The joint characterization studies included micro structural examination and evaluation of mechanical properties of the joints. Microhardness variation, impact toughness, and tensile strength of the joints were evaluated. Neither a crack nor an incomplete bonding zone was observed. The tensile strength of the joints was higher than the strength of the base material, and the friction and upsetting pressures were found to influence the joint strength. The tensile strength of all the welds was observed to be increasing with an increase in the rotational speed. The toughness of the friction welds was evaluated at room temperature and also at subzero（cryo） temperature conditions. The toughness for friction welds was found to be superior to the fusion welds of duplex stainless steel at room temperature and cryo conditions. Weldments exhibited better corrosion resistance than the parent material.

关键词： Duplex stainless steel Hardness Tensile strength Toughness Microstructure Corrosion

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On the Optimization of performance of Hg_xCd_(1-x)s Based Electrochemical photosensing Cell

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稀有金属材料与工程 2012年第S1期41卷 43-46页

作者： Lendave s AL p pingale p CL p Deshmukh L p Thin Film and solar studies Research Laboratory Department of Physics(Appli.Elect.)Solapur UniversitySolapur-413255M.S.India

chemical growth process that favours deposition of semiconductor materials from a liquid phase was used to obtain Cds and HgxCd1-xs(0≤x≤0.25)photosensitive thin film electrodes on the stainless steel *** deposition of these series of thin films was carried out under the optimized conditions of temperature(60℃),time(90 min)and pH(10.8±0.2).These films were then employed as photosensitive electrode in an electrochemical photosensing cell consisting of sulphide/polysulphide redox electrolyte and a graphite counter *** cells were illuminated by an input illumination intensity of 13 mW/cm 2 and the cell characteristic parameters namely photocurrent(Iph),photo voltage(Vph),the quantum conversion efficiency(η%)and fill factor(ff %)have been *** Vph and Iph have been found to be boosted as the electrode composition is *** conversion efficiency and fill factor enhanced from 0.52%to 1.30%and 31.8%to 37.8%,respectively for the change of electrode composition from 0 to *** of junction ideality factor(nd)showed recombination mechanism at the electrode-electrolyte *** height measurements gave pool-Frenkel type conduction *** flat band potentials(Vfb)were determined for all the cells and found to be enhanced with x up to 0.08 and then decreased for further increase in *** lighted junction quality factor(nL)is increased from 1.49 to 2.94 as the photoelectrode composition(x)was varied from 0 to *** barrier heights(B)at the electrode/electrolyte interfaces were also *** is found that B is higher for a cell of electrode composition equal to *** spectral studies on these cells showed the cut off wavelength(λc)shifted from 530 nm to 800 *** transient response studies showed presence of surface states at the interface that causes Fermi-level ***,performance of the electrochemical photosensing cell is found to be improved after Hg-corboration in Cds and is optimum at x= 0.0

关键词： electrochemical cell photosensing fill factor interface states photovoltage photocurrent

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A systematic review of progenitor survival and maturation in parkinsonian models

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Neural Regeneration Research 2025年第11期20卷 3172-3178页

作者： Giulia Comini Eilís Dowd pharmacology&Therapeutics and Galway Neuroscience Center University of GalwayGalwayIreland

stem cell-based brain repair is a promising emergent therapy for parkinson's disease based on years of foundational research using human fetal donors as a cell *** current therapeutic options for patients,this approach has the potential to provide longterm stem cell–derived reconstruction and restoration of the dopaminergic input to denervated regions of the brain allowing for restoration of certain functions to *** ultimate clinical success of stem cell–derived brain repair will depend on both the safety and efficacy of the approach and the latter is dependent on the ability of the transplanted cells to survive and differentiate into functional dopaminergic neurons in the parkinsonian *** the pre-clinical literature suggests that there is considerable variability in survival and differentiation between studies,the aim of this systematic review was to assess these parameters in human stem cell-derived dopaminergic progenitor transplant studies in animal models of parkinson's disease.A defined systematic search of the pubMed database was completed to identify relevant studies published up to March *** screening,76 articles were included in the analysis from which 178 separate transplant studies were *** these,graft survival could be assessed in 52 studies and differentiation in 129 ***,we found that graft survival ranged froms transplanted,with a median of 51%of transplanted cells surviving in the brain;while dopaminergic differentiation of the cells ranged from 0% to 46% of cells transplanted with a median of 3%.This systematic review suggests that there is considerable scope for improvement in the differentiation of stem cell-derived dopaminergic progenitors to maximize the therapeutic potential of this approach for patients.

关键词： cell replacement therapy differentiation embryonic stem cells graft induced pluripotent stem cells parkinson's disease survival transplant

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s doping induces to promoted spatial separation of charge carriers on carbon nitride for efficiently photocatalytic degradation of atrazine

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Chinese Journal of structural chemistry 2023年第12期42卷 52-59页

作者： Qiang Zhang Weiran Gong Huinan che Bin Liu Yanhui Ao Key Laboratory of Integrated Regulation and Resource Development on shallow Lakes Ministry of EducationCollege of EnvironmentHohai UniversityNo.1Xikang RoadNanjing210098China Department of Materials science and Engineering City University of Hong KongHong Kong SAR999077China

Atrazine(ATZ),as one of the most extensively employed organochlorine-based herbicides,exhibits persistence and environmental *** technology based on polymer carbon nitride is regarded as a sus-tainable and promising approach for the degradation of emerging organic ***,the inherent shortcomings of pure carbon nitride greatly limit its practical ***,s-doped carbon nitride was elaborately constructed for efficient degradation of *** removal efficiency of ATZ by the optimal sample(0.052 min^(-1))is 3.25 times as that of pure carbon nitride(0.016 min^(-1)).Experiments and DFT calculations show that s doping optimizes electronic structure of carbon nitride,which significantly enhances the spatial separation and transfer efficiency of photogenerated electrons and ***,the reactive sites and degradation paths of ATZ were predicted by Fukui function and LC-Ms *** work provides an effective approach for the design of efficient photocatalysts to achieve efficient environmental remediation.

关键词： photocatalysis Carbon nitride Atrazine Fukui function

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Combating with extremely noisy samples in weakly supervised slot filling for automatic diagnosis

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Frontiers of Computer science 2023年第5期17卷 67-73页

作者： Xiaoming sHI Wanxiang che school of Computer science and Technology Harbin Institute of TechnologyHarbin 150001China

slot filling,to extract entities for specific types of information(slot),is a vitally important modular of dialogue systems for automatic *** responses can be regarded as the weak supervision of patient *** this way,a large amount of weakly labeled data can be obtained from unlabeled diagnosis dialogue,alleviating the problem of costly and time-consuming data ***,weakly labeled data suffers from extremely noisy *** alleviate the problem,we propose a simple and effective Co-WeakTeaching *** method trains two slot filling models *** two models learn from two different weakly labeled data,ensuring learning from two ***,one model utilizes selected weakly labeled data generated by the other,*** model,obtained by the Co-WeakTeaching on weakly labeled data,can be directly tested on testing data or sequentially fine-tuned on a small amount of human-annotated *** results on these two settings illustrate the effectiveness of the method with an increase of 8.03%and 14.74%in micro and macro f1 scores,respectively.

关键词： dialogue system slot filling co-teaching

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Abscisic acid, a promising therapeutic molecule to prevent Alzheimer’s and neurodegenerative diseases

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Neural Regeneration Research 2020年第6期15卷 1035-1036页

作者： Ana María sánchez-pérez Department of Medicine Universitat Jaume I

Neuroinflammatory processes induce neuronal damage and underlie the onset of neurodegenerative pathologies,including Alzheimer’s disease(AD)(Calsolaro and Edison,2016).several conditions,ranging from emotional stress to metabolic syndrome,including traumatic brain injury,chronic infections or gut microbiota disruption can cause or aggravate ***,aging is the major factor associated with neurodegenerative diseases.

关键词： degenerative Alzheimer diseases

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searching for QCD critical point with light nuclei

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Nuclear science and Techniques 2023年第5期34卷 192-195页

作者： che Ming Ko Cyclotron Institute and Department of physics and Astronomy Texas A&M UniversityCollege StationTexas 77843‑3366USA

Density fluctuations and correlations due to a first-order quark-gluon plasma to hadronic matter phase transition and its critical end point,if they remain present after the hadronic evolution in a heavy ion collisions,can lead to an enhanced production of light nuclei in these *** would then result in a non-monotonic collision energy dependence of the yield ratio NtNp∕Nd2of proton number Np,deuteron number Nd,and triton number *** of this yield ratio as a function of collision energy thus provides the possibility to probe the equation of state of strong-interaction matter and its phase diagram.

关键词： critical collision light

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