Littérature scientifique sur le sujet « Fillets quality »
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Articles de revues sur le sujet "Fillets quality"
1
Ikasari, Diah, et Theresia Dwi Suryaningrum. « Quality Changes of Pangasius Fillets During Ice Storage ». Squalen Bulletin of Marine and Fisheries Postharvest and Biotechnology 10, no 3 (20 décembre 2015) : 109. http://dx.doi.org/10.15578/squalen.v10i3.134.
Texte intégralRésumé :
Quality asessment of pangasius (Pangasius hypopthalmus) fillets stored in ice has been conducted. Fish were fasted for one day and slaughtered using bleeding techniques, drained for 10 minutes and filleted in various types of fillet: skin on, skinless, trimmed and untrimmed condition. Fillets were then washed and packed in vacuum plastics, stored in ice (0-4 ºC) for 18 days and observed for its sensory, chemical and microbiological parameters every 3 days. The sensory evaluation was conducted both for fresh or cooked fillets using scoring test on attribute of appearance, odor and texture as well as hedonic test. The chemical parameters observed were proximate; pH and Total Volatile Base (TVB); while microbiological parameter was Total Plate Count (TPC). Results showed that type of fillet did not significantly affect the quality of pangasius fillets. The quality of all treated fillet decreased in line with time of storage, all products were rejected after being stored for 18 days. At the time of rejection, the quality parameters: moisture content ranging from 80.1 to 81.3%, TVB from 11.1 to 11.5 mg N/100g and TPC from 1.41 to 4.6x105 CFU/ml. It is suggested to preserve pangasius fillets in ice less than 18 days.
2
Alexi, Niki, Konstantina Sfyra, Eugenia Basdeki, Evmorfia Athanasopoulou, Aikaterini Spanou, Marios Chryssolouris et Theofania Tsironi. « Raw and Cooked Quality of Gilthead Seabream Fillets (Sparus aurata, L.) after Mild Processing via Osmotic Dehydration for Shelf Life Extension ». Foods 11, no 14 (7 juillet 2022) : 2017. http://dx.doi.org/10.3390/foods11142017.
Texte intégralRésumé :
The current study aimed to explore the effects of mild processing for shelf-life extension on the raw an-d cooked quality of gilthead seabream fillets stored at 2 °C. Control and Treated (via osmotic dehydration) fillets were sampled at the beginning (D1), middle (D5) and end (D7) of commercial shelf life. The raw quality was evaluated via the quality index method (QIM), microbial measurements and for D1 through tetrad discrimination testing. The cooked quality was evaluated for the same samples via sensory descriptive analyses with a trained panel. The tetrad results indicated similar characteristics between treatments for raw fillets on D1 and a 29% shelf-life extension for Treated fillets vs. the Control ones, defined by Quality Index Method and microbial measurements. The raw quality was reflected in the cooked quality of the tissue, with the Treated fillets exhibiting less intense spoilage-related sensory attributes as well as enhanced or retained freshness-related attributes throughout storage, when compared to the Control ones. A range of treatment induced sensory characteristics, partly associated to Maillard reactions, were developed in the Treated fillets. Overall, the treatment affected positively both the raw and cooked quality of the fillet, showing promising results as a shelf-life extension method for fish fillet preservation.
3
Morisasa, Mizuki, Keisuke Kimura, Motoki Sumida, Saya Fukumoto, Tadashi Tamura, Riko Takeuchi, Tsukasa Mori et Naoko Goto-Inoue. « Application of Matrix-Assisted Laser Desorption/Ionization Mass Spectrometry Imaging for Evaluating the Quality of Fish Fillets ». Foods 9, no 4 (1 avril 2020) : 402. http://dx.doi.org/10.3390/foods9040402.
Texte intégralRésumé :
Consumption of fish is rapidly increasing worldwide. It is important to evaluate fish fillet quality because fish undergoes physical and chemical changes during frozen storage. Fish fillets exhibit formaldehyde (FA) accumulation from the decomposition of trimethylamine N-oxide. FA is a powerful protein denaturant; thus, it is important to avoid FA buildup during fish processing to preserve fish quality, especially texture. To determine where FA accumulates, in order to maintain the quality of fish fillets, we performed matrix-assisted laser desorption/ionization mass spectrometry imaging, aiming to identify muscle-derived peptides, which reflect conditions such as denaturation and/or aggregation. We used frozen sections from which lipophilic molecules were washed out and detected various peptide peaks. Furthermore, we tried to identify indices to represent fish fillet softening by protease treatment. We could detect characteristic peaks owing to FA and protease treatment; the findings were consistent with the results of texture profiles showing fish fillet’s real solidity. These molecules might thus serve as effective markers to evaluate fish fillet quality.
4
Fantini, Letícia Emiliani, Jorge Antonio Ferreira de Lara, Ádina Cléia Botazzo Delbem, Thiago Tetsuo Ushizima, Jayme Aparecido Povh et Cristiane Meldau de Campos. « Quality attributes and properties of surubim (Pseudoplatystoma spp.) meat ». Semina : Ciências Agrárias 36, no 6 (9 décembre 2015) : 3957. http://dx.doi.org/10.5433/1679-0359.2015v36n6p3957.
Texte intégralRésumé :
The aim of this study was to evaluate the quality attributes and properties of fillets from surubins (Pseudoplatystoma spp.) reared in cages and fishponds. The design of the study was completely randomized, with two treatments (cage and fishpond) and 16 replicates each. The fillets from fishes reared in cage and fishpond had a mean total weight of 134.71 ± 33.11 g and 151.56 ± 18.56 g, respectively. The following parameters were analyzed: pH, water retention capacity (WRC), color (L* brightness), (a* red), (b* yellow), and shear force (SF). The data were subjected to analysis of variance and the means were compared by Tukey’s and Mann-Whitney (nonparametric) tests. Statistically significant differences (p<0.05) were observed for WRC, SF, and pH variables. Only for color attributes (L*), (a*), (b*), no statistically significant difference (p>0.05) was detected between the treatments. A lower pH (6.17 ± 0.23) was observed in fillets from surubins reared in cage. As this is close to the isoelectric point of myofibrillar proteins, it reduces their net charge and, consequently, their capacity to retain water. Lower WRC of fillets obtained from fishes reared in cage (61.46 ± 1.62%) implies loss of nutritional value through the exudate released which results in drier fillets and compromised tenderness. In fillets from cage production, SF (1.06 ± 0.22 kgf) was higher than those from fishpond, i.e., the higher the shear force, the lower the tenderness of the fillet. On the basis of the observation that fillets from fishes reared in fishponds were more tender, this study confirmed that the quality of surubin fillets is influenced by the production system.
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Ngoc, T. T. A., R. Sarnes et L. N. Binh. « Optimization of soaking treatment on the quality of Pangasius fillet ». Supplementary 6 4, S6 (27 décembre 2020) : 79–84. http://dx.doi.org/10.26656/fr.2017.4(s6).002.
Texte intégralRésumé :
In Pangasius fillet industries, soaking fillet with food additives such as sorbitol, sodium tripolyphosphate (STPP) and sodium chloride (NaCl) is a common practice to increase the quality of fillets. In this study, the fillets were soaked with different concentrations of sorbitol (1.32-4.68%), STPP (0.32-3.68%) and NaCl (1.32-4.68%) by using response surface methodology (RSM) with Central Composite Design with six replicates experimental design. The soaking solutions had a significant impact on weight gain, pH and water activity (p<0.05). The soaking solution of NaCl 1.32%, STPP 1.88% and sorbitol 4.68% were optimal using multi-response optimizer. In addition, the optimum soaking time was studied from 15 to 60 mins. The results showed that soaking time should be appropriated for 30 mins. The optimum concentration and time of soaking can be considered as a practical pre-treatment to improve the quality of Pangasius fillets either for fresh, chilled, or frozen storage.
6
Dementieva, Natalia, Tatyana Boitsova, Elena Fedoseeva et Polina Krugovaya. « Influence of the Technological Cycle «Fixing» on the Quality Characteristics of Pollock Fillets (Theragra Chalcogramma) ». Food Industry 5, no 3 (21 septembre 2020) : 97–104. http://dx.doi.org/10.29141/2500-1922-2020-5-3-11.
Texte intégralRésumé :
Pollock (Theragra chalcogramma) remains one of the main fishing objects in the far Eastern region. The most popular product on both the domestic and international markets is fillet, when it is frozen it can be used to produce a wide range of finished products. The main technology for obtaining iced fillet consists of its production in a fixed or loose form. A man conducts the operation «fixed fillet» immediately after filleting fresh fish by irrigation or immersion in a cold 10 % solution of table salt. The research purpose was to determine changes in the quality characteristics of fixed and unfixed Pollock fillets during cold storage. The research object was refrigerated fixed and unfixed fillet of Pollock stored at a temperature below minus 18 degrees for up to 26 weeks. During storage the authors run organoleptic assessment on refrigerated, defrosted fillets after the cooking test. The results are the following: after 6 weeks of storage the organoleptic quality indicators are quite stable for all types of fillets; after 14 weeks there is a 40 % decrease in the overall score for the fixed fillet; moreover, there are the main changes in the samples after cooking for the most significant organoleptic indicators: color, taste, smell, consistency. After 14 weeks of storage the quality indicators of loose fillets remained almost unchanged. By the 14th week of storage the freshness value coefficient of the fixed fillet increases almost 3 times (from 14.8 to 40.0), i.e. a man can consume the fish only after mandatory cooking. The study identified that the operation of fixing fillet preserved the fillet block integrity, giving greater mechanical strength to the fillets, reducing the tissue juice loss, but it is inferior in organoleptic parameters to the loose fillet during storage reducing its shelf life. According to the experiment results, the researchers recommend a storage period for fixed frozen fillet of Pollock – up to 5 months, for loose fillet – up to 7 months without considering packaging materials.
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Tran, Minh Phu, Thi Kim Duyen Huynh, Le Anh Dao Nguyen, Thi Nhu Ha Nguyen, Quoc Thinh Nguyen et Hagiwara Tomoaki. « The effect of guava (Psidium guajava) leaf extract on the quality of cobia (Rachycentron canadum) fillets during ice storage ». Can Tho University Journal of Science 13, Aquaculture (30 juin 2021) : 52–63. http://dx.doi.org/10.22144/ctu.jen.2021.017.
Texte intégralRésumé :
The aim of this study is to evaluate the effects of Psidium guajava leaves extract on the quality of cobia (Rachycentron canadum) fillets during in ice storage. A group of cobia fillets was soaked in Psidium guajava extract solutions at concentration of 0.03% (w/v) for 30 minutes while the other group soaked in cold ice water, considered as control treatment. The experimental fillets were packed and stored in ice for 15 days. Sampling were done on the 1st, 5th, 10th and 15th day. Analyzed parameters included temperature, total viable counts (TVC), sensory property, pH, moisture, water holding capacity (WHC), texture, total volatile base nitrogen (TVB–N), peroxide value (PV), Thiobarbituric acid reactive substances (TBARs), and fillet color. The results indicated that cobia fillets treated with guava extract solutions 0.03% showed significantly higher sensory property, lower PV and TBARs compared to the control treatment during ice storage. Based on the sensory property and total viable counts, cobia fillets can be used up to 10 days in both treatments remaining high quality of the cobia fillet.
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Baryczka, Marlena Justyna, Iwona Chwastowska-Siwiecka et Jacek Kondratowicz. « Evaluation of the quality of chilled and frozen African catfish (Clarias gariepinus Burchell, 1822) fillets ». Czech Journal of Food Sciences 37, No. 3 (3 juillet 2019) : 186–91. http://dx.doi.org/10.17221/330/2018-cjfs.
Texte intégralRésumé :
The quality of chilled and frozen African catfish fillets was compared. The experiment was performed on 20 individuals of Clarias gariepinus aged < 1 year, with estimated body weight of 1 kg. A total of 40 right and left fillets were subjected to pre-treatment. Chilled right fillets (20) and left fillets (20) stored for 8 months in the freezer were subjected to quantitative and qualitative laboratory analyses. Chilled African catfish fillets had a lower of moisture content, higher of total protein, fat and crude ash, and higher energy value than frozen samples. Chilled fillets had also higher water-holding capacity, lower cooking loss and higher tenderness.
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Boitsova, Tatyana, Natalia Dementieva, Olga Sakharova, Elena Fedoseeva et Valery Bogdanov. « Method of fish quality preservation at deep handling of raw materials ». E3S Web of Conferences 161 (2020) : 01096. http://dx.doi.org/10.1051/e3sconf/202016101096.
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Deep cutting of fish raw materials is a priority for fish processing enterprises. The the influence of high-pressure processing of fish fillets has been studied and it has been shown that the impact of pressure above 100 MPa leads to a decrease in the total contamination by microorganisms. Further increase in pressure leads to an even greater decrease in the total number of microorganisms. The structural and mechanical properties of the fillet change slightly. High pressure makes the fish’s muscle tissue more dense. Pressure-treated fillets supposed to be stored chilled or frozen for much longer, since their initial quality indicators are much higher than those of fillets not treated with high pressure. The possibility of enriching the whole muscle tissue of fish with vegetable oil lipids when exposed to high pressure is shown.
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Murray, D. S., M. J. Kainz, L. Hebberecht, K. R. Sales, K. Hindar et M. J. G. Gage. « Comparisons of reproductive function and fatty acid fillet quality between triploid and diploid farm Atlantic salmon ( Salmo salar ) ». Royal Society Open Science 5, no 8 (août 2018) : 180493. http://dx.doi.org/10.1098/rsos.180493.
Texte intégralRésumé :
Triploidy could prevent escaped farm salmon breeding in the wild, while also improving nutrient quality within farmed fillets. Despite these potential advantages, triploid Atlantic salmon have not been widely used in aquaculture, and their reproductive function has yet to be fully evaluated. Here, we compare reproductive function and fillet composition between triploid and diploid farm salmon under standard aquaculture rearing conditions. We show that female triploids are sterile and do not develop gonads. By contrast, males produce large numbers of motile spermatozoa capable of fertilizing wild salmon eggs. However, compared with diploids, reproductive development and survival rates of eggs fertilized by triploid males were significantly reduced, with less than 1% of eggs sired by triploid males reaching late-eyed stages of development. Analyses of fillets showed that total lipid and fatty acid quantities were significantly lower in triploid than in diploid Atlantic salmon fillets. However, when fatty acids were normalized to total lipid content, triploid fillets had significantly higher relative levels of important omega-3 long-chain polyunsaturated fatty acids. Our results show that: (i) escaped triploid farm salmon are very unlikely to reproduce in the wild and (ii) if able to match diploid fillet lipid content, triploid farm salmon could achieve better fillet quality in terms of essential fatty acids.
Thèses sur le sujet "Fillets quality"
1
Zaman, Shafi Ullah. « Safety and quality of high pressure (HP) treated fish : evaluation of pressure destruction kinetics of pathogens and associated quality changes during storage ». Thesis, McGill University, 2004. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=82454.
Texte intégralRésumé :
This study is aimed at evaluating the safety and quality of pressure treated fish. In order to assess safety of refrigerated fish, the sensitivity of key pathogens like Escherichia coli O157:H7 and Listeria monocytogenes Scott A, which thrive under refrigerated storage conditions, needs to be assessed.In the first part of the study, the pressure destruction kinetics of E. coli and L. monocytogenes in fish were evaluated at 250 to 400 MPa with a holding time ranging from 0-60 min. A slurry was prepared by blending 20 g filleted fish and 80 ml sterile peptone water (0.1%) in a stomacher. To the slurry, stock cultures of E. coli O157:H7 and L. monocytogenes were added separately and final counts of 107 and 106 CFU/ml were achieved, respectively. Due to the higher overall pressure resistance at 400 MPa, E. coli was selected as the target microorganism in this study for pressure destruction.
The second part of the study focused on storage studies. The first phase of the storage study was a repeat of previous set of experiments with fish slurry inoculated with only E. coli O157:H7 which was more resistant to pressure destruction (challenge study).
The second phase of storage studies evaluated the quality changes associated with pressure treated fish. (Abstract shortened by UMI.)
2
Sequeira-Munoz, Amaral. « Use of high pressure for improving the quality and shelf life of frozen fish ». Thesis, McGill University, 2001. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=37834.
Texte intégralRésumé :
The spoilage pattern of carp (Cyprinus carpio) fillets was investigated. The studies were aimed at evaluating the potential use of pressure-shift freezing to reduce quality deterioration during frozen storage. The effects of pressure treatment at low temperature on fish carp fillets were evaluated and conditions were chosen to reduce any adverse effect on the quality of fish fillet. Pressure-shift freezing treatment was applied to carp fillets and biochemical properties were evaluated and correlated with objective measurement of texture, drip loss and the size of ice crystals formed. Changes in these properties were monitored during frozen storage for a period of 75 days.Results indicated that proteolityc changes due to endogenous enzymes in fish muscle play an important role in quality deterioration of carp fillets during ice storage. No changes were observed in Ca2+-ATPase, Mg2+-ATPase or Mg2+-EGTA-ATPase activity of actomyosin from carp fillets during iced storage (p > 0.05). In contrast, Mg2+-Ca2+-ATPase and Ca2+ sensitivity of actomyosin decreased during ice storage of fish fillets. No changes were found in the SH content of actomyosin throughout the ice storage of carp fillets (p > 0.05). The surface hydrophobicity of actomyosin and auto-degradation products increased during the storage period (p < 0.05).
Response surface methodology (RSM) was used to study the effect of high-pressure treatment on some physico-chemical properties (actomyosin extractability, Ca2+-ATPase activity, surface hydrophobicity, TBA value, liquid loss and firmness) of intact fish fillets. Balancing the benefits of low temperature pressurization with the denaturing effects of pressure on fish proteins, it is evident that there is a region in which the responses of the factors (protein extractability, Ca2+-ATPase activity and protein hydrophobicity) to the processing variables (time and pressure) seemed to be adequate to keep protein denaturation to a minimum. This region lies between 140--175 MPa and 16--18 min. However, it was observed that high-pressure treatment induced changes in colour on fish fillets. The L*, a* and b* values increased as pressure and time treatment increased.
The application of pressure-shift freezing or air-blast freezing resulted in decrease in myofibrillar and sarcoplasmic protein extractability, and reduced actomyosin Ca2+-ATPase activity during frozen storage. However, actomyosin Ca2+-ATPase activity in pressure-shift frozen samples remained relatively higher than that of air-blast frozen samples. On the other hand, levels of thiobarbituric acid and free fatty acids were relatively lower in samples frozen by PSF. The freezing procedure did not seem to have a significant effect (p > 0.05) on the texture of carp fillets. The ice crystals found in PSF fish samples were mainly intracellular, smaller and more regular shaped than those found in the ABF samples, which were mainly extracellular. Differential scanning calorimetry showed that PSF treatment appeared to be more effective in preventing protein denaturation in post-rigor fish fillets than in the pre-rigor fish fillets.
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Oluwole, Adebanji Olasupo. « Modified atmosphere packaging and quality of fresh Cape hake (Merluccius capensis) fish fillets ». Thesis, Stellenbosch : Stellenbosch University, 2014. http://hdl.handle.net/10019.1/95967.
Texte intégralRésumé :
Thesis (MScFoodSc)--Stellenbosch University, 2014.ENGLISH ABSTRACT: Fresh ready-to-cook fish fillets are prone to rapid loss of freshness and other quality attributes, as well as accelerated growth of spoilage micro-organisms under sub-optimal storage conditions. Cape hake (Merluccius capensis) is an important seafood in South Africa; however, rapid loss of quality and eventual spoilage is a problem limiting the economic potential. Thus, the aim of this study was to investigate the effects of active (40% CO2 + 30% O2 + 30% N2) and passive (0.039% CO2 + 20.95% O2 + 78% N2) modified atmosphere packaging (MAP) under different storage temperatures (0°C, 4°C, and 8°C) on the quality attributes of Cape hake (Merluccius capensis) fish fillets. This was achieved by investigating the effects of MAP (with or without absorbent pads) and storage temperature on quality attributes (microbial, physicochemical and sensory), changes in composition and concentration of volatile compounds (VOCs) and shelf life of Cape hake fillets. Modified atmosphere packaging, storage temperature and the use of absorbent pads had a significant (p < 0.05) impacts on physicochemical properties of Cape hake fillets during refrigerated storage. Highest storage temperature (8°C) led to accelerated deterioration of packaged Cape hake fillets. Generally, active MAP better maintained the quality attributes of Cape hake than passive MAP at 0°C and 4°C. Headspace gas composition of O2 and CO2 were significantly influenced by the storage time, temperature, MAP conditions and their interactions (p < 0.05). Irrespective of storage temperature, active-MA packaged fillets had lower pH values in comparison to fillets stored under passive-MAP. Drip loss was higher in active-MA fillets packaged without absorbent pad. Passive-MAP fillets did not show any drip loss. Absorbent pad was used to add value to MAP storage as MAP resulted in drip. The use of absorbent pad combined with low storage temperature maintained the firmness of hake fillets, across all temperatures. The interaction of MAP, absorbent pad and storage temperature had a significant effect on the aerobic mesophillic bacteria counts. Based on the aerobic mesophillic bacteria count fillets stored under active-MAP at 0°C (5.2 log cfu/g) was limited to day 12, while the fillet stored under passive-MAP at 0°C (log cfu/g) was limited to greater than day 3. Overall sensory acceptability of fillets decreased with increase in storage temperature across all treatments. Additionally, MAP had a significant (p < 0.05) impact on sensory attributes such as appearance and odour acceptability, with active-MA packaged fillets stored at 0°C having highest overall acceptability. A total of 16 volatiles were identified in Cape hake fillets, including 4 primary VOCs and 12 secondary VOCs. The VOCs associated with spoilage include tri-methylamine (TMA) (ammonia like), esters (sickeningly sweet) and sulphur group (putrid). MAP had a significant (p< 0.05) influence on volatile composition and concentration. Active-MA packaged fillets performed better during storage and had lower TMA value of 0.85% on day 12 in comparison with 7.22% under passive-MAP on day 6 at 0°C. The results obtained demonstrated that changes in volatile compounds were significantly (p< 0.05) influenced by storage duration, temperature and MAP. The development of high levels of VOCs and off-odour corresponded with high aerobic mesophillic bacteria count (≥ 5.5 log cfu/g). Based on these developments the storage life of Cape hake fillets packaged under active-MAP with absorbent pad and stored at 0°C was limited to 12 d, while the passive-MAP (control) fillets stored at 0°C was limited to 3 d. The use of active-MAP, in combination with absorbent pads and 0°C storage in addition to good hygienic practices, was effective in maintaining the postharvest quality of Cape hake fish fillets and led to higher shelf life.
AFRIKAANSE OPSOMMING: Vars, gereed-vir-kook vis filette is geneig om gou hulle varsheid en ander gehalte kenmerke te verloor en die vervoegde groei van mikro-organismes wat bederf tydens stoor veroorsaak, vind plaas. Kaapse stokvis (Merluccius capensis) is in Suid-Afrika ‘n gewilde seekos maar die ekonomiese potensiaal daarvan word deur die feit dat dit so gou in gehalte afneem en bederf, beperk. Dus word daar met hierdie studie gepoog om die effek van aktiewe (40% CO2 + 30% O2 + 30% N2) en passiewe (0.039% CO2 + 20.95% O2 + 78% N2) aangepasde verpakking (MAP) onder verskillende stoortemperature (0°C, 4°C, en 8°C) op die gehalte kenmerke van Kaapse stokvis (Merluccius capensis) filette te ondersoek. Dit is gedoen deur om die effek van MAP (met of sonder kussinkies) en stoortemperatuur op die gehalte kenmerke (mikrobies, fisiochemies en sensories) asook veranderinge in komposisie en konsentrasie van vlugtige samestellings (VOCs) en die raklewe van Kaapse stokvis filette te ondersoek. Aangepasde atmosfeer verpakking, stoortemperatuur en die gebruik van absorberende kussinkies het ‘n groot impak (p < 0.05) op die fisiochemiese kenmerke van Kaapse stokvis tydens stoor in yskaste gehad. Hoë stoortemperature (8°C) het aanleiding gegee tot die vinnige bederf van verpakte Kaapse stokvis filette. Oor die algemeen het aktiewe MAP die gehalte van die Kaapse stokvis filette teen 0°C and 4°C beter bewaar. Die komposisie van O2 en CO2 is heelwat deur stoortyd, temperatuur, MA toestande en die interaksies tussen bogenoemde, beïnvloed (p< 0.05). By alle temperature het aktiewe MA verpakte filette laer pH waardes getoon in vergeleke met filette wat in onder passiewe MA verpak is. Die drupverlies was hoër in aktiewe MA filette verpak sonder absorberende kussinkies. Passiewe MAP filette het nie enige drupverlies getoon nie. Absorberende kussinkies is gebruik om waarde by te voeg tot MAP stoor aaangesien MAP gelei het tot drup. By alle temperature het die gebruik van absorberende kussinkies tesame met lae stoortemperature bygedra tot die behoud van fermheid. Die interaksie van MAP, absorberende kussinkies, en stoortemperatuur het ‘n groot effek gehad op die aerobiese mesofiliese bakterië telling. Weens die aerobiese mesofiliese bakterië telling is stoor van filette onder aktiewe MAP teen 0°C (5.2 log cfu/g) beperk tot dag 12, terwyl filette gestoor onder passiewe MAP teen 0°C ( log cfu/g) beperk is tot dag 3. Oor die algemeen het die sensoriese aanneemlikheid van filette sonder inasgneming van die behandeling, verklein met ‘n toename in stoortemperature. MAP het ook ‘n groot impak op die sensoriese kenmerke soos voorkoms, reuk, en aktiewe MA verpakte fillets gestoor teen 0°C is oor die algemeen die aanneemlikste. ‘n Totaal van 16 vlugtige substanse is in Kaapse stokvis identifiseer. Dit het vier primêre VOCs en 12 sekondêre VOCs ingesluit. Die VOCs wat met bederf assosieer word, sluit tri-metilamien (TMA) (soos ammoniak), esters (soet) en die swael groep (smetterig) in. MAP het ‘n groot (p < 0.05) invloed op die vlugtige komposisie en konsentrasie. Aktiewe MA verpakte filette het beter tydens stoor presteer en het ‘n laer TMA waarde van 0.85% op dag 12 gehad, in vergelyking met 7.22 % onder passiewe MAP op dag 6 teen 0°C. Die resultate toon dat veranderinge in vlugtige samestellings grootliks beïnvloed word (p < 0.05) deur stoortyd, temperature en MAP. Die ontwikkeling van hoë vlakke van VOCs, slegte reuke en verlies aan varsheid gaan tesame met hoë aerobiese mesofiliese bakterië telling (≥ 5.5 log cfu/g). Gegrond op hierdie tellings is die stoorleeftyd van Kaapse stokvis filette beperk tot dag 12, terwyl passiewe MAP (die kontrole) filette gestoor teen 0°C, beperk is tot dag 3. Om op te som, die gebruik van aktiewe MAP tesame met absorberende kussinkies en 0°C stoor asook goeie higiëniese praktyk, kon die na-oes gehalte van Kaapse stokvis filette behou en het gelei tot ‘n langer rakleeftyd.
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Seremeti, Maria Makri. « Evaluation of the quality of individual quick frozen fish products ». Thesis, Robert Gordon University, 2007. http://hdl.handle.net/10059/648.
Texte intégralRésumé :
In the present study the effects of characteristic freezing times and storage time at -22°C on the quality of the adductor muscle of post-rigor scallops (Pecten maximus)and gilthead seabream fillets (Sparusa urata) were studied in regard to the integrity of muscle structure, myofibrillar protein denaturation and aggregation, lipid degradation, texture and sensory changes. This information would be useful for achieving optimal conditions for freezing these species and assessing their quality during frozen storage for commercial purposes. Scallop muscles and gilthead seabream fillets were frozen individually with characteristic freezing times that can be met in commercial practice of freezing seafoods. After freezing, the samples were thawed and their quality was evaluated. Fresh samples were analyzed as controls. Intermediate characteristic freezing times (i. e. 89 and 49 minutes for scallop muscles and 74 minutes for gilthead seabream fillets) caused more damage to cell structure of both species than the shorter and longer characteristic freezing times tested. Short characteristic freezing times (i. e. 19 minutes for scallop muscles, and 2 and 18 minutes for gilthead seabream fillets) reduced the thawing losses of both species compared to the longer characteristic freezing times (. e. 235 to 1000 minutes for scallop muscles, and 640 minutes for gilthead seabream fillets) tested. Freezing at short characteristic freezing times produced raw fillets similar in texture to the fresh fillets. Therefore, short characteristic freezing times (equal to or less than 19 minutes) are beneficial for freezing both species. Scallop muscles and gilthead seabream fillets were kept frozen for up to 301 and 340 days, respectively. Sampling was carried out at regular intervals on fresh and stored frozen samples. Storage time affected the integrity of infra-cellular organelles, reduced the water holding capacity, caused structural changes to myofibrillar proteins and affected the sensory attributes of both species. Frozen scallop muscles were in acceptable eating condition after a storage period of ten months, with most of the changes in bio-chemical and physical properties being pronounced after three months of storage. Based on the changes in taste scores versus storage time, it was assessed that the practical storage life of frozen gilthead seabream fillets was circa 5 to 6 months Cat+-ATPase activities for scallop muscles and a linear model that combines free fatty acids, peroxide values and protein content in centrifugal tissue fluids for gilthead seabream fillets, may be reliable methods for industry to use for assessing their quality during long term storage at -22°C.
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Houjaij, Nada. « The application of high pressure treatment and its effect on the quality attributes of trout and shrimp / ». Thesis, McGill University, 2000. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=30821.
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The application of high pressure (HP) processing on trout and shrimps was investigated in order to study its effect on their quality attributes. Five levels of pressure, holding time and temperature were selected using a central composite rotatable design (CCRD), the central point being. 200 MPa, 30 min and 10°C. This design was used in order to permit the measurement and modeling of changes in various quality parameters as a result of changes in the process variables. The color parameters (L*, a*, and b* values), physical attributes (drip-loss, protein leaching and water holding capacity) and texture parameters (firmness and springiness) in each case were evaluated, and modeled as second order polynomial equations.Artificial Neural Network modeling was employed to investigate its ability in predicting the quality changes in both pressure-treated trout fillets and shrimp samples, and its performance was with statistical models.
High pressure (HP) kinetics of the microbial destruction in both trout and shrimp was also studied. (Abstract shortened by UMI.)
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Pedulli, Riccardo. « Evaluation of the effects of the diet on the quality of cryo-smoked salmon fillets by 1H-NMR profiling ». Master's thesis, Alma Mater Studiorum - Università di Bologna, 2021.
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In questo lavoro di tesi è stato dimostrato come la Risonanza Magnetica Nucleare (NMR) sia una tecnica in grado di valutare gli effetti della dieta sul profilo molecolare di campioni di salmoni freschi e di campioni trattati con una particolare tecnica di affumicatura denominata “crio-affumicatura”, che prevede un’affumicatura a 5 °C per un tempo di 3 ore mediante un flusso continuo di azoto. Nello specifico, i campioni di salmone sono stati allevati utilizzando due formulazioni differenti di mangimi, una commerciale ed una innovativa. L’analisi NMR accoppiata con un approccio di tipo metabolomico consente la determinazione simultanea di un’ampia classe di metaboliti che costituiscono il campione attraverso la generazione di spettri che contengono moltissime informazioni. Queste informazioni possono essere utili al fine di capire come l’alimentazione possa influenzare tutto il pattern metabolico e come di conseguenza anche i parametri relativi alla freschezza del pesce come il k-index, il rapporto TMA/TMAO e l’insieme degli aminoacidi ne risentano. I dati spettroscopici ottenuti sono stati interpretati attraverso analisi statistica sia univariata (ANOVA e TUKEY Test), sia multivariata, nello specifico in questo ultimo caso l’analisi delle componenti principali o PCA, per individuare eventuali differenze significative tra i due gruppi a seguito della diversa tipologia di alimentazione.
Dal presente lavoro di tesi è stato possibile concludere che i campioni vengono distribuiti e classificati in funzione della dieta. Inoltre, è stato possibile individuare i metaboliti che maggiormente determinano questa separazione.
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D'Souza, Natasha. « Effect of Dietary Soybean Meal and its Components on the Quality of Rainbow Trout Fillets : Isoflavone Deposition and Lipid Oxidative Status ». Fogler Library, University of Maine, 2006. http://www.library.umaine.edu/theses/pdf/DsouzaN2006.pdf.
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McAdams, Thomas James. « The determination of microbial quality and presence of pathogens and chemical contaminants in aquacultured rainbow trout (Oncorhynchus mykiss) fillets and whole fish from different aquaculture production systems ». Thesis, Virginia Tech, 1996. http://hdl.handle.net/10919/44981.
Texte intégralRésumé :
Qualitative and quantitative levels of human pathogens (Listeria monocytogenes, Clostridium botulinum, Salmonella species, Vibrio cholerae, Yersinia enterocolitica and Y. pseudotuberculosis) and general microbial quality of whole aquacultured rainbow trout (Oncorhynchus mykiss) were in compare differing aquacultural systems and growing seasons. Listeria levels and general microbial quality were determined on fillets from three facilities and compared to whole fish. Secondly, in each facility and season, levels of select minerals and heavy metals in edible tissue were determined. Aerobic plate counts for whole fish and fillets ranged from 3-6 logs. Coliform counts were high in many cases, but fecal coliform, and E. coli were comparatively lower. Both whole fish and fillets showed similar Listeria incidence (25-90%) and respective levels of 1.12-21 and 0.36-4.83 MPN/g. Presumptive C. botulinum incidence was 45-95% with levels of 0.46-2.33 MPN/g. Coliform, fecal coliforms, and E. coli counts and Listeria and C. botulinum incidence and counts were significant in plant/year interaction (p<0.05). A significant increase from whole fish to fillets in mesophilic APC, coliforms, and Listeria counts (p<0.05) was observed. No Salmonella, Vibrio cholerae, or Yersinia were isolated from any sample. Levels of Na, Zn, S, Ca, Mg, Mn, and Fe were generally within normal ranges. The heavy metals- As, Hg, Ni, Co, Cr, Mo, Pb, and Cd when detected, were below 0.5 ppm, with the exception of Cd in one sample (60.49 ppm). The presence of both C. botulinum and Listeria would be of concern to processors, although no heavy metals were at levels to cause concern.Master of Science
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Ferrer, i. Vidal Fina. « Les percepcions positives i la qualitat de vida familiar en famílies amb fills i/o filles amb discapacitat intel·lectual ». Doctoral thesis, Universitat de Barcelona, 2016. http://hdl.handle.net/10803/401341.
Texte intégralRésumé :
Tradicionalment en el camp de la discapacitat s’estudiava l’impacte negatiu que tenia en les mares i els pares el fet de tenir un fill o filla amb discapacitat intel·lectual (DI). S’avaluaven els nivells d’estrès, d’ansietat i depressió que presentaven aquestes famílies i quines variables hi podien influir. Progressivament, van anar apareixent treballs que analitzaven les percepcions positives de les famílies respecte les contribucions del seu fill o filla amb DI a la família. Paral·lelament, l’enfocament teòric sistèmic i ecològic de la família amb fills/es amb discapacitat anava agafant més rellevància entre la comunitat científica i els/les professionals d’aquest àmbit; donant lloc a l’estudi i conceptualització de la qualitat de vida familiar (QdVF) de les famílies amb persones amb DI. Recentment es troben treballs que analitzen diferents factors, entre ells les variables sociodemogràfiques, que poden estar relacionats amb la QdVF. No obstant, no es troben estudis que avaluïn les relacions entre les percepcions positives de les famílies amb un fill o filla amb DI i la QdVF en població espanyola.
L’objectiu principal d’aquesta tesi doctoral consistia en avaluar la presència de percepcions positives en les famílies amb fills o filles amb DI al llarg del seu cicle vital en població espanyola, així com l’anàlisi de les relacions entre aquestes percepcions positives i la QdVF. Per tal de recollir dades sobre els percepcions positives, es va realitzar l’adaptació i validació de l’instrument de mesura Kansas Inventory Parental Perceptions (KIPP) en població espanyola. Aquesta tesi està configurada per quatre articles.
La mostra es va composar de 861 famílies d’arreu del territori espanyol amb una persona a la família amb DI d’entre 1 i 70 anys d’edat. Els pares, les mares o d’altres familiars van respondre els instruments de mesura Escala de Contribuciones Positivas (PCS) de l’Inventario de Percepciones Parentales i Escala de Calidad de Vida Familiar (CdVF-E 0-18 i CdVF-E >18 años). Es van aplicar anàlisis bivariants per estudiar l'efecte de les variables demogràfiques i les puntuacions de les percepcions positives en les puntuacions de QdVF. Es van realitzar anàlisis de regressió per predir els nivells de QdVF.
Els resultats indicaven que les famílies amb fills o filles amb DI de qualsevol edat en la població espanyola mostraven percepcions positives. A més, la presència de nivells més elevats de percepcions positives en les famílies amb persones amb DI estava significativament relacionat amb nivells més elevats de QdVF. L’anàlisi predictiu de la QdVF mostrava que tant en famílies amb infants o adolescents amb DI com en famílies amb persones adultes amb DI s’obtenia un efecte significatiu entre les percepcions positives i la QdVF, fins i tot quan l’efecte de les variables demogràfiques s’eliminava del model.
Aquests resultats evidenciaven la importància del paper de les percepcions positives en les famílies amb una persona amb DI, a l’hora de promoure la seva QdVF. En les implicacions pràctiques es discutia la necessitat de potenciar les percepcions positives per part dels i les professionals, per empoderar a les famílies i treballar des d’un enfocament centrat en la família.In the field of disability studies, authors have traditionally studied the negative impact on parents of having a child with intellectual disabilities (ID). Gradually, studies have begun to appear that analyze families’ positive perceptions regarding the contributions of their child, adolescent or adult member with ID to the family. In parallel, the use of a systematic theoretical and ecological approach in families with disabled children has taken on increasing relevance in the scientific community and among professionals in this field, leading to the study and conceptualization of family quality of life (FQoL) in families with people with ID. Recent studies have analyzed different factors which may be related to FQoL. However, there are no studies that evaluate the relationship between families’ positive perceptions of their family member with ID and FQoL in the Spanish population. The main objective of this PhD thesis was to evaluate the presence of positive perceptions in families with a family member with ID throughout their life cycle in the Spanish population, as well as to analyze the relationships between these positive perceptions and FQoL. The thesis is formed by four articles. The sample of participants comprised 861 families from all over Spain with a person in the family with ID between 1 and 70 years old. Parents or other relatives completed the Positive Contributions Scale (PCS) and the Spanish version of the Family Quality of Life Scales (FQoL <18 and >18 years). Bivariate analyses were applied to study the effect of demographic variables and positive perceptions scores on FQoL scores. Regression analyses were performed to predict FQoL levels. The results suggested that the presence of these positive perceptions in families with people with ID was significantly associated with increased FQoL scores. The predictive analysis of FQoL showed that in both groups of families with a member with ID younger or older than 18 years of age, there was a significant effect from positive perceptions on the reported levels of FQoL. The present results provided further evidence of the role of positive perceptions in families with a person who have ID, in order to promote their FQoL. Among the practical implications of these results we stressed that professionals should promote positive perceptions in order to empower families and they should apply a family-centered approach.
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Ogden, Gary N. « The quality of binder-filler interfaces in carbon electrodes ». Thesis, Loughborough University, 1995. https://dspace.lboro.ac.uk/2134/7049.
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The aims of this research project were to identify and classify the binder-filler interfaces formed in carbon electrodes and to determine the effects of the interfacial quality on important electrode properties. The effects of raw materials and some fabrication process variables on interfacial characteristics and quality of laboratory produced test electrodes were also studied, and the development of binder-filler interfaces during the carbonisation process followed. Electrode quality was assessed by measurement of density, electrical resistivity and tensile strength. Pore structural data were also obtained by using a computerised image analysis system allied to an optical microscope. Interface quality data were obtained by examining etched surfaces in a scanning electron microscope and classifying the binder-filler interface observed into one of five categories. The category depending on the extent of contact between the binder and filler. Accordingly, test electrodes were produced from combinations of four filler carbons, comprising three grades of calcined petroleum coke and an electro-calcined anthracite, and four coal-tar binder pitches which varied in the type and quantity of insoluble matter content. Examination of these test electrodes showed that the nature of the filler carbon used had a dominant influence on the quality of the interface formed, as assessed by this technique. A combination of one filler carbon and one binder pitch was used to study the effects of some fabrication process variables. These were pitch content and, mixing time and temperature. Of these process variables, pitch content and mixing temperature were found to have the major effects on the binder-filler interface and electrode quality. Investigation of the development of the binder-filler interfaces during the carbonisation process showed three distinct zones of interface development and transformation. These zones were associated with three temperature dependent mechanisms; thermal stress relaxation between 200-350 degrees C, volatile gas evolution from coal-tar pitch decompositionb etween3 50-600 degrees C and stresses induced by thermal contraction of the binder phase between 600-1000 degrees C.
Livres sur le sujet "Fillets quality"
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Lee, K. E. Water quality assessment of the Upper Mississippi River Basin, Minnesota and Wisconsin-polychlorinated biphenyls in common carp and walleye fillets, 1975-95. Mounds View, Minn : U.S. Dept. of the Interior, U.S. Geological Survey, 1998.
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Gilgan, M. W. Development of high levels of histamine in Atlantic herring (Clupea harengus harengus) and gaspereau (Alosa pseudoharengus) : An examination of the effect of temperature and bacterial contamination on histamine accumulation in good quality fillets. Halifax, N.S : Fisheries Inspection Branch, Dept. of Fisheries and Oceans, 1987.
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Hayton, A. Fill quality guidelines for lakefilling in Ontario : Application of sediment and water quality guidelines to lakefilling : report. [Toronto] : Water Resources Branch, Ontario Ministry of the Environment, 1992.
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Talbot, James R. Quality control of soil compaction using ASTM standards. West Conshohocken, PA : ASTM International, 2011.
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Talbot, James R. Quality control testing of earthfill compaction using ASTM standards. West Conshohocken, PA : ASTM International, 2011.
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Farmer, James J. Hydrogeology, water quality, and ecology of Anderton Branch near Quail Hollow Landfill, Bedford County, Tennessee, 1995-99. Reston, Va : U.S. Dept. of the Interior, U.S. Geological Survey, 2004.
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Farmer, James J. Hydrogeology, water quality, and ecology of Anderton Branch near Quail Hollow Landfill, Bedford County, Tennessee, 1995-99. Reston, Va : U.S. Dept. of the Interior, U.S. Geological Survey, 2004.
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Farmer, James J. Hydrogeology, water quality, and ecology of Anderton Branch near Quail Hollow Landfill, Bedford County, Tennessee, 1995-99. Reston, Va : U.S. Dept. of the Interior, U.S. Geological Survey, 2004.
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Reppond, Kermit D. Effects of holding walleye pollock in ice and refrigerated seawater on the quality of modified fillet blocks containing up to 30% mince. [Seattle, Wash.] : National Oceanic and Atmospheric Administration, National Marine Fisheries Service, [Northwest and Alaska Fisheries Center], 1987.
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Peter, Kathy D. Hydrogeologic characteristics of the Lee Acres Landfill Area, San Juan County, New Mexico. Albuquerque, N.M : U.S. Department of the Interior, Geological Survey, Water Resources Division, 1987.
Trouver le texte intégralChapitres de livres sur le sujet "Fillets quality"
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Esteves, Eduardo. « Effects of Time-Temperature Abuses on Quality Parameters of Frozen Blue Jack Mackerel (Trachurus picturatus) Fillets Treated with Green Tea Extract ». Dans INCREaSE 2019, 233–45. Cham : Springer International Publishing, 2019. http://dx.doi.org/10.1007/978-3-030-30938-1_19.
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Mallick, Maitri, Bhabanisankar Sahani, Mohini Priya Padhi, Jyoti Prasad Ganthia, Nihar Ranjan Mohanta et Dhanada Kanta Mishra. « Quality Enhancement of Bituminous Concrete Using Cenosphere Fillers ». Dans Springer Proceedings in Energy, 1–7. Singapore : Springer Singapore, 2022. http://dx.doi.org/10.1007/978-981-16-6879-1_1.
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Stavropoulos, Panagiotis, Alexios Papacharalampopoulos et Kyriakos Sabatakakis. « Online Quality Inspection Approach for Submerged Arc Welding (SAW) by Utilizing IR-RGB Multimodal Monitoring and Deep Learning ». Dans Lecture Notes in Mechanical Engineering, 160–69. Cham : Springer International Publishing, 2022. http://dx.doi.org/10.1007/978-3-031-18326-3_16.
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AbstractOnline, Image-based monitoring of arc welding requires direct visual contact with the seam or the melt pool. During SAW, these regions are covered with flux, making it difficult to correlate temperature and spatial related features with the weld quality. In this study, by using a dual-camera setup, IR and RGB images depicting the irradiated flux during fillet welding of S335 structural steel beams are captured and utilized to develop a Deep Learning model capable of assessing the quality of the seam, according to four classes namely “no weld”, “good weld”, “porosity” and “undercut/overlap”, as they’ve emerged from visual offline inspection. The results proved that the camera-based monitoring could be a feasible online solution for defect classification in SAW with exceptional performance especially when a dual-modality setup is utilized. However, they’ve also pointed out that such a monitoring setup does not grand any real-world advantage when it comes to the classification of relatively large, defective seam regions.
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García-Arrieta, Sonia, Essi Sarlin, Amaia De La Calle, Antonello Dimiccoli, Laura Saviano et Cristina Elizetxea. « Thermal Demanufacturing Processes for Long Fibers Recovery ». Dans Systemic Circular Economy Solutions for Fiber Reinforced Composites, 81–97. Cham : Springer International Publishing, 2022. http://dx.doi.org/10.1007/978-3-031-22352-5_5.
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AbstractThe possibility of recycling glass (GF) and carbon fibers (CF) from fiber-reinforced composites by using pyrolysis was studied. Different fibers from composite waste were recovered with thermal treatment. The recycled fibers were evaluated as a reinforcement for new materials or applications. The main objective was to evaluate the fibers obtained from the different types of industrial composite waste considering the format obtained, the cleanliness and the amount of inorganic fillers and finally, the fibers quality. These characteristics defined the processes, sectors and applications in which recycled fibers can replace virgin fibers. These fibers were also evaluated and validated with tensile testing and compared to the tensile strength of virgin GF and CF.
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Birkenes, Adele, Siennah Yang, Benjamin Bachman, Stephanie Ingraldi et Ibrahima Sory Diallo. « Where Is the Closest Health Clinic ? YouthMappers Map Their Communities Before and During the COVID-19 Pandemic ». Dans Sustainable Development Goals Series, 57–68. Cham : Springer International Publishing, 2022. http://dx.doi.org/10.1007/978-3-031-05182-1_5.
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AbstractYouthMappers chapters are both locally and globally situated, fostering a confluence of community input, GIS skill sets, subject-matter expertise, and creativity that drives progress toward the Sustainable Development Goals (SDGs). Examining Hudson Valley Mappers’ and Gaston Berger University YouthMappers’ community mapping projects in parallel offers rich insights on open mapping for SDG 3 Good Health and Well-being and highlights the value of SDG 4 Quality Education. Both YouthMappers chapters collaborated with local partners to map health facilities and other community resources; the resulting maps and data filled critical information gaps during the COVID-19 pandemic. The project outcomes underscore the unique niche that the YouthMappers network occupies in the open mapping world.
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Téot, Luc. « Atrophic Scars : Reinforcing the Flap Mattress Using Adipocyte Transfer in Paraplegic Patients at Risk of Pressure Ulcer Recurrence ». Dans Textbook on Scar Management, 531–33. Cham : Springer International Publishing, 2020. http://dx.doi.org/10.1007/978-3-030-44766-3_63.
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AbstractAtrophic scars may be defined as depressive areas on the skin, due to a defect of fatty tissue under the skin. This situation may lead to adherence to the depth (fascia, bone, tendon) to be a source of functional impairment. Most of the atrophic scars are secondary to acne localized over the face. Multiple techniques were proposed to restore the volume and uniformize the surface, like laser, injection of fat, microneedling, microdermabrasion, dermal fillers, and surgical techniques such as subcision and platlet rich plasma (PRP). On the basis of level 1 evidence currently available, it appears that PRP can improve the quality of atrophic acne scars treated with ablative fractional CO2 laser and decrease the duration of laser-related side effects including edema and erythema (Goutos). Regenerative surgery, including fat harvesting, centrifugation, and isolation of adipocyte stem cells, has been promoted since years and should be repeated when injected fat progressive crush is observed. The clinical case presented here is a paraplegic patient presenting a pressure sore in the left ischiatic area. The flap was successful but the depth of the transplanted fatty tissue was decreasing after some years. A first fat injection was programmed.
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Chergui, Akram, Nicolas Beraud, Frédéric Vignat et François Villeneuve. « Finite Element Modeling and Validation of Metal Deposition in Wire Arc Additive Manufacturing ». Dans Lecture Notes in Mechanical Engineering, 61–66. Cham : Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-70566-4_11.
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AbstractWire arc additive manufacturing allows the production of metallic parts by depositing beads of weld metal using arc-welding technologies. This low-cost additive manufacturing technology has the ability to manufacture large-scale parts at a high deposition rate. However, the quality of the obtained parts is greatly affected by the various thermal phenomena present during the manufacturing process. Numerical simulation remains an effective tool for studying such phenomena. In this work, a new finite element technique is proposed in order to model metal deposition in WAAM process. This technique allows to gradually construct the mesh representing the deposited regions along the deposition path. The heat source model proposed by Goldak is adapted and combined with the proposed metal deposition technique taking into account the energy distribution between filler material and the molten pool. The effectiveness of the proposed method is validated by series of experiments, of which an example is detailed in this paper.
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Fabbris, Luigi, et Alfonso Piscitelli. « Experience, sensorial skills and personality qualifying a wine consumer as an expert ». Dans Proceedings e report, 229–34. Florence : Firenze University Press, 2021. http://dx.doi.org/10.36253/978-88-5518-461-8.43.
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This paper analyses the characteristics of wine consumers that may qualify them as wine experts. The wine evaluation expertise of consumers, as measured by various degrees of self-perceived ability, is hypothesised to causally depend on cognitive and non-cognitive characteristics of wine experience, on sensorial skills relevant for wine assessment and on wine consumption-related personality aspects. Our work consisted in measuring and analysing the relationships between the self-assessment of the ability to wine assessment given by a convenience sample of consumers and the qualification of their consumption experience and training (ranging from “simple” consumer to producer/seller to professional sommeliers), their sensorial (olfactory, flavour) skills and enogastronomic culture. Wine culture is defined as the capacity to harmonise wine and food and conceive wine as a nutritional, social and health-related means. The analysed data refer to a tasting experiment held as a social activity during a scientific meeting in Pescara, Italy, in 2018. The sample of wine assessors who filled in the evaluation questionnaire included both meeting participants and people belonging to AIS-Abruzzo, the regional association of chartered sommeliers. The data collected at wine tasters showed that there were strong relationships between the self-evaluation as wine expert and the consumption experience, the assessment skills, and the wine consumption “culture”. The relationships differed according to age, activity and length of wine consumption experience of the assessors.
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Hale, Robert C., Meredith E. Seeley, Ashley E. King et Lehuan H. Yu. « Analytical Chemistry of Plastic Debris : Sampling, Methods, and Instrumentation ». Dans Microplastic in the Environment : Pattern and Process, 17–67. Cham : Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-78627-4_2.
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AbstractApproaches for the collection and analysis of plastic debris in environmental matrices are rapidly evolving. Such plastics span a continuum of sizes, encompassing large (macro-), medium (micro-, typically defined as particles between 1 μm and 5 mm), and smaller (nano-) plastics. All are of environmental relevance. Particle sizes are dynamic. Large plastics may fragment over time, while smaller particles may agglomerate in the field. The diverse morphologies (fragment, fiber, sphere) and chemical compositions of microplastics further complicate their characterization. Fibers are of growing interest and present particular analytical challenges due to their narrow profiles. Compositional classes of emerging concern include tire wear, paint chips, semisynthetics (e.g., rayon), and bioplastics. Plastics commonly contain chemical additives and fillers, which may alter their toxicological potency, behavior (e.g., buoyancy), or detector response (e.g., yield fluorescence) during analysis. Field sampling methods often focus on >20 μm and even >300 μm sized particles and will thus not capture smaller microplastics (which may be most abundant and bioavailable). Analysis of a limited subgroup (selected polymer types, particle sizes, or shapes) of microplastics, while often operationally necessary, can result in an underestimation of actual sample content. These shortcomings complicate calls for toxicological studies of microplastics to be based on “environmentally relevant concentrations.” Sample matrices of interest include water (including wastewater, ice, snow), sediment (soil, dust, wastewater sludge), air, and biota. Properties of the environment, and of the particles themselves, may concentrate plastic debris in select zones (e.g., gyres, shorelines, polar ice, wastewater sludge). Sampling designs should consider such patchy distributions. Episodic releases due to weather and anthropogenic discharges should also be considered. While water grab samples and sieving are commonplace, novel techniques for microplastic isolation, such as continuous flow centrifugation, show promise. The abundance of nonplastic particulates (e.g., clay, detritus, biological material) in samples interferes with microplastic detection and characterization. Their removal is typically accomplished using a combination of gravity separation and oxidative digestion (including strong bases, peroxide, enzymes); unfortunately, aggressive treatments may damage more labile plastics. Microscope-based infrared or Raman detection is often applied to provide polymer chemistry and morphological data for individual microplastic particles. However, the sheer number of particles in many samples presents logistical hurdles. In response, instruments have been developed that employ detector arrays and rapid scanning lasers. The addition of dyes to stain particulates may facilitate spectroscopic detection of some polymer types. Most researchers provide microplastic data in the form of the abundances of polymer types within particle size, polymer, and morphology classes. Polymer mass data in samples remain rare but are essential to elucidating fate. Rather than characterizing individual particles in samples, solvent extraction (following initial sample prep, such as sediment size class sorting), combined with techniques such as thermoanalysis (e.g., pyrolysis), has been used to generate microplastic mass data. However, this may obviate the acquisition of individual particle morphology and compositional information. Alternatively, some techniques (e.g., electron and atomic force microscopy and matrix-assisted laser desorption mass spectrometry) are adept at providing highly detailed data on the size, morphology, composition, and surface chemistry of select particles. Ultimately, the analyst must select the approach best suited for their study goals. Robust quality control elements are also critical to evaluate the accuracy and precision of the sampling and analysis techniques. Further, improved efforts are required to assess and control possible sample contamination due to the ubiquitous distribution of microplastics, especially in indoor environments where samples are processed.
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Sakalo, N. N., A. E. Korotynskii et M. Beirodt. « Off-line Mobile Robot for Welding of Horizontal Fillets in Girder Structures ». Dans Weld Quality : the Role of Computers, 225–26. Elsevier, 1988. http://dx.doi.org/10.1016/b978-0-08-036614-2.50041-x.
Texte intégralActes de conférences sur le sujet "Fillets quality"
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Qin, Jianwei, Fartash Vasefi, Rosalee Hellberg, Alireza Akhbardeh, Rachel Isaacs, Ayse Gamze Yilmaz, Chansong Hwang, Insuck Baek, Walter F. Schmidt et Moon S. Kim. « Inspecting species and freshness of fish fillets using multimode hyperspectral imaging techniques ». Dans Sensing for Agriculture and Food Quality and Safety XII, sous la direction de Moon S. Kim, Byoung-Kwan Cho et Bryan A. Chin. SPIE, 2020. http://dx.doi.org/10.1117/12.2558684.
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Chauvin, John, Fartash Vasefi, Kouhyar Tavakolian, Alireza Akhbardeh, Nicholas B. MacKinnon, Jianwei Qin, Diane E. Chan et Moon S. Kim. « Reconstruction of hyperspectral spectra of fish fillets using multi-wavelength Imaging and point spectroscopy ». Dans Sensing for Agriculture and Food Quality and Safety XII, sous la direction de Moon S. Kim, Byoung-Kwan Cho et Bryan A. Chin. SPIE, 2020. http://dx.doi.org/10.1117/12.2559230.
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Yoon, Seung-Chul, Brian Bowker, Kurt Lawrence et Hong Zhuang. « Real-time machine vision system for online detection of wooden breast myopathy in chicken fillets (Conference Presentation) ». Dans Sensing for Agriculture and Food Quality and Safety X, sous la direction de Moon S. Kim, Byoung-Kwan Cho, Bryan A. Chin et Kuanglin Chao. SPIE, 2018. http://dx.doi.org/10.1117/12.2305149.
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Nguyen, T. T. T., Q. P. Pham, Q. K. Do, C. C. Vo et T. V. Nguyen. « A Study on the Texture Quality of Vietnamese Catfish (Pangasius Hypophthalmus) Fillets after Different Freezing Processes ». Dans ICBBE '19 : 2019 6th International Conference on Biomedical and Bioinformatics Engineering. New York, NY, USA : ACM, 2019. http://dx.doi.org/10.1145/3375923.3375958.
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Xu, Yongxia, Rui Wang, Honglei Zhao, Jiamei Zhao, Jianping Zhang et Jianrong Li. « Effects of gelatin combined with essential oils coating on storage quality of turbot (Psetta maxima) fillets ». Dans 2017 6th International Conference on Measurement, Instrumentation and Automation (ICMIA 2017). Paris, France : Atlantis Press, 2017. http://dx.doi.org/10.2991/icmia-17.2017.112.
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Naufalin, Rifda, Rumpoko Wicaksono et Eva Triyulianingrum. « Edible coating application with addition of kecombrang flower concentrates to maintain quality fillets of gurami fish during storage ». Dans 1ST INTERNATIONAL CONFERENCE ON MATERIAL SCIENCE AND ENGINEERING FOR SUSTAINABLE RURAL DEVELOPMENT. Author(s), 2019. http://dx.doi.org/10.1063/1.5097500.
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Yang, Yi, Seung-chul Yoon, Hong Zhuang, Wei Wang, Hongzhe Jiang et Beibei Jia. « Prediction of Quality attributes of Chicken Breast Fillets by Using Vis/NIR Spectroscopy Combined with Factor Analysis Method ». Dans 2017 Spokane, Washington July 16 - July 19, 2017. St. Joseph, MI : American Society of Agricultural and Biological Engineers, 2017. http://dx.doi.org/10.13031/aim.201700728.
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Yang, Yi, Wei Wang, Hong Zhuang, Seung-chul Yoon, Brian Bowker et Hongzhe Jiang. « Prediction of Quality Attributes of Chicken Breast Fillets by Using Hyperspectral Imaging Technique Combined with Deep Learning Algorithm ». Dans 2019 Boston, Massachusetts July 7- July 10, 2019. St. Joseph, MI : American Society of Agricultural and Biological Engineers, 2019. http://dx.doi.org/10.13031/aim.201901301.
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Yang, Yi, Wei Wang, Seung-chul Yoon, Hong Zhuang, Hongzhe Jiang et Beibei Jia. « <i>Prediction of quality traits of Chicken Breast Fillets by Different spectral range of Hyperspectral Imaging</i> ; ». Dans 2018 Detroit, Michigan July 29 - August 1, 2018. St. Joseph, MI : American Society of Agricultural and Biological Engineers, 2018. http://dx.doi.org/10.13031/aim.201800828.
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Joshi, Nikhil, et Debasish Dutta. « Feature Simplification in Surface Models for Efficient Finite Element Mesh Generation ». Dans ASME 2002 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference. ASMEDC, 2002. http://dx.doi.org/10.1115/detc2002/cie-34494.
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Sheet metal components are typically modelled as freeform surface models. Finite element meshes generated automatically for such models have poor quality around small detailed features. These features need to be simplified in order to obtain an acceptable mesh. Simplification involves recognition of the feature and modification of its geometry or complete suppression of the feature. This paper proposes techniques to directly query the CAD data structure to recognise and suppress two basic features, viz. holes and fillets in freeform surface models. Results of a software implementation for the same are discussed with suitable examples.
Rapports d'organisations sur le sujet "Fillets quality"
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Tao, Yang, Victor Alchanatis et Yud-Ren Chen. X-ray and stereo imaging method for sensitive detection of bone fragments and hazardous materials in de-boned poultry fillets. United States Department of Agriculture, janvier 2006. http://dx.doi.org/10.32747/2006.7695872.bard.
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As Americans become increasingly health conscious, they have increased their consumptionof boneless white and skinless poultry meat. To the poultry industry, accurate detection of bonefragments and other hazards in de-boned poultry meat is important to ensure food quality andsafety for consumers. X-ray imaging is widely used for internal material inspection. However,traditional x-ray technology has limited success with high false-detection errors mainly becauseof its inability to consistently recognize bone fragments in meat of uneven thickness. Today’srapid grow-out practices yield chicken bones that are less calcified. Bone fragments under x-rayshave low contrast from meat. In addition, the x-ray energy reaching the image detector varieswith the uneven meat thickness. Differences in x-ray absorption due to the unevenness inevitablyproduce false patterns in x-ray images and make it hard to distinguish between hazardousinclusions and normal meat patterns even by human visual inspection from the images.Consequently, the false patterns become camouflage under x-ray absorptions of variant meatthickness in physics, which remains a major limitation to detecting hazardous materials byprocessing x-ray images alone.Under the support of BARD, USDA, and US Poultry industries, we have aimed todeveloping a new technology that uses combined x-ray and laser imaging to detect bonefragments in de-boned poultry. The technique employs the synergism of sensors of differentprinciples and has overcome the deficiency of x-rays in physics of letting x-rays work alone inbone fragment detection. X-rays in conjunction of laser-based imaging was used to eliminatefalse patterns and provide higher sensitivity and accuracy to detect hazardous objects in the meatfor poultry processing lines.Through intensive research, we have met all the objectives we proposed during the researchperiod. Comprehensive experiments have proved the concept and demonstrated that the methodhas been capable of detecting frequent hard-to-detect bone fragments including fan bones andfractured rib and pulley bone pieces (but not cartilage yet) regardless of their locations anduneven meat thickness without being affected by skin, fat, and blood clots or blood vines.
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Weber, Elin, Josefina Zidar, Birgit Ewaldsson, Kaisa Askevik, Birgit Ewaldsson, Emma Svensk et Elin Törnqvist. Aggression in group housed male mice – a systematic review. INPLASY - International Platform of Registered Systematic Review and Meta-analysis Protocols, décembre 2022. http://dx.doi.org/10.37766/inplasy2022.12.0078.
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Review question / Objective: By systematically reviewing articles investigating male mouse aggression we wanted to map how the literature in the field support, or not, the available recommendations on how to prevent aggression in group housed male mice, and to detect knowledge gaps that ought to be filled. We also wanted to address and describe how aggression have been measured in the literature, since this may influence the possibility to translate outcomes to normal husbandry conditions and contribute to useful recommendations. Condition being studied: Aggression between male cage mates is one of the main problems in laboratory mouse husbandry, affecting both animal welfare and scientific quality.
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Choudhary, Ruplal, Victor Rodov, Punit Kohli, Elena Poverenov, John Haddock et Moshe Shemesh. Antimicrobial functionalized nanoparticles for enhancing food safety and quality. United States Department of Agriculture, janvier 2013. http://dx.doi.org/10.32747/2013.7598156.bard.
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Original objectives The general goal of the project was to utilize the bactericidal potential of curcumin- functionalizednanostructures (CFN) for reinforcement of food safety by developing active antimicrobial food-contact surfaces. In order to reach the goal, the following secondary tasks were pursued: (a) further enhancement of the CFN activity based on understanding their mode of action; (b) preparing efficient antimicrobial surfaces, investigating and optimizing their performance; (c) testing the efficacy of the antimicrobial surfaces in real food trials. Background to the topic The project dealt with reducing microbial food spoilage and safety hazards. Cross-contamination through food-contact surfaces is one of the major safety concerns, aggravated by bacterial biofilm formation. The project implemented nanotech methods to develop novel antimicrobial food-contact materials based on natural compounds. Food-grade phenylpropanoidcurcumin was chosen as the most promising active principle for this research. Major conclusions, solutions, achievements In agreement with the original plan, the following research tasks were performed. Optimization of particles structure and composition. Three types of curcumin-functionalizednanostructures were developed and tested: liposome-type polydiacetylenenanovesicles, surface- stabilized nanoparticles and methyl-β-cyclodextrin inclusion complexes (MBCD). The three types had similar minimal inhibitory concentration but different mode of action. Nanovesicles and inclusion complexes were bactericidal while the nanoparticlesbacteriostatic. The difference might be due to different paths of curcumin penetration into bacterial cell. Enhancing the antimicrobial efficacy of CFN by photosensitization. Light exposure strengthened the bactericidal efficacy of curcumin-MBCD inclusion complexes approximately three-fold and enhanced the bacterial death on curcumin-coated plastic surfaces. Investigating the mode of action of CFN. Toxicoproteomic study revealed oxidative stress in curcumin-treated cells of E. coli. In the dark, this effect was alleviated by cellular adaptive responses. Under light, the enhanced ROS burst overrode the cellular adaptive mechanisms, disrupted the iron metabolism and synthesis of Fe-S clusters, eventually leading to cell death. Developing industrially-feasible methods of binding CFN to food-contact surfaces. CFN binding methods were developed for various substrates: covalent binding (binding nanovesicles to glass, plastic and metal), sonochemical impregnation (binding nanoparticles to plastics) and electrostatic layer-by-layer coating (binding inclusion complexes to glass and plastics). Investigating the performance of CFN-coated surfaces. Flexible and rigid plastic materials and glass coated with CFN demonstrated bactericidal activity towards Gram-negative (E. coli) and Gram-positive (Bac. cereus) bacteria. In addition, CFN-impregnated plastic material inhibited bacterial attachment and biofilm development. Testing the efficacy of CFN in food preservation trials. Efficient cold pasteurization of tender coconut water inoculated with E. coli and Listeriamonocytogeneswas performed by circulation through a column filled with CFN-coated glass beads. Combination of curcumin coating with blue light prevented bacterial cross contamination of fresh-cut melons through plastic surfaces contaminated with E. coli or Bac. licheniformis. Furthermore, coating of strawberries with CFN reduced fruit spoilage during simulated transportation extending the shelf life by 2-3 days. Implications, both scientific and agricultural BARD Report - Project4680 Page 2 of 17 Antimicrobial food-contact nanomaterials based on natural active principles will preserve food quality and ensure safety. Understanding mode of antimicrobial action of curcumin will allow enhancing its dark efficacy, e.g. by targeting the microbial cellular adaptation mechanisms.
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Apiyo, Eric, Zita Ekeocha, Stephen Robert Byrn et Kari L. Clase. Improving Pharmacovigilliance Quality Management System in the Pharmacy and Poisions Board of Kenya. Purdue University, décembre 2021. http://dx.doi.org/10.5703/1288284317444.
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The purpose of this study was to explore ways of improving the pharmacovigilance quality system employed by the Pharmacy and Poisons Board of Kenya. The Pharmacy and Poisons Board of Kenya employs a hybrid system of pharmacovigilance that utilizes an online system of reporting pharmacovigilance incidences and a physical system, where a yellow book is physically filled by the healthcare worker and sent to the Pharmacy and Poisons Board for onward processing. This system, even though it has been relatively effective compared to other systems employed in Africa, has one major flaw. It is a slow and delayed system that captures the data much later after the fact and the agency will always be behind the curve in controlling the adverse incidents and events. This means that the incidences might continue to arise or go out of control. This project attempts to develop a system that would be more proactive in the collection of pharmacovigilance data and more predictive of pharmacovigilance incidences. The pharmacovigilance system should have the capacity to detect and analyze subtle changes in reporting frequencies and in patterns of clinical symptoms and signs that are reported as suspected adverse drug reactions. The method involved carrying out a thorough literature review of the latest trends in pharmacovigilance employed by different regulatory agencies across the world, especially the more stringent regulatory authorities. A review of the system employed by the Pharmacy and Poisons Board of Kenya was also done. Pharmacovigilance data, both primary and secondary, were collected and reviewed. Media reports on adverse drug reactions and poor-quality medicines over the period were also collected and reviewed. An appropriate predictive pharmacovigilance tool was also researched and identified. It was found that the Pharmacy and Poisons Board had a robust system of collecting historical pharmacovigilance data both from the healthcare workers and the general public. However, a more responsive data collection and evaluation system is proposed that will help the agency achieve its pharmacovigilance objectives. On analysis of the data it was found that just above half of all the product complaints, about 55%, involved poor quality medicines; 15% poor performance, 13% presentation, 8% adverse drug reactions, 7% market authorization, 2% expired drugs and 1% adulteration complaints. A regulatory pharmacovigilance prioritization tool was identified, employing a risk impact analysis was proposed for regulatory action.
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Tabinskyy, Yaroslav. VISUAL CONCEPTS OF PHOTO IN THE MEDIA (ON THE EXAMPLE OF «UKRAINER» AND «REPORTERS»). Ivan Franko National University of Lviv, mars 2021. http://dx.doi.org/10.30970/vjo.2021.50.11099.
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The article is devoted to the analysis of the main forms of visualization in the media related to photo. The thematic visual concepts are described in accordance with the content of electronic media, which consider the impact of modern technologies on the development of media space. The researches of the Ukrainian and foreign educational institutions concerning the main features of modern photo is classificate. Modifications and new visual forms in the media are singled out. The main objective of the article is to study the visual concepts of modern photo and identify ideological and thematic priorities in photo projects. To achieve the main objective in the article a certain methodology were used. Due to the historical-theoretical description it was possible to substantiate the study of visual concepts. The conceptual-system method was used to study the subject of media photo projects. The main results of the research are the definition of visual concepts of photo on the example of electronic media and the identification of the main thematic features in the process of visual filling of the media space. Based on the study, we can conclude that today the information field needs quality visual content. For successful creation of visual concepts it is necessary to single out thematic features of modern photo and to carry out classifications on ideological and semantic signs. Given the rapid development of digital technologies, the topic of the scientific article we offer is relevant for scientists, journalists, media researchers, visual journalism experts and photojournalists. Modern space is filled with a large number of pictorial materials, which in most cases form specific images, patterns or stereotypes in the mind of the reader (viewer). Also important is the classification of photo used in journalistic publications. That is why there is a need to explore the content and principles of distribution of ideological priorities of photo in the media. The substantiation of scientists about the important place of photography in the modern media space and the future development of visual technologies, which already use artificial intelligence, is relevant.
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Philosoph-Hadas, Sonia, Peter Kaufman, Shimon Meir et Abraham Halevy. Signal Transduction Pathway of Hormonal Action in Control and Regulation of the Gravitropic Response of Cut Flowering Stems during Storage and Transport. United States Department of Agriculture, octobre 1999. http://dx.doi.org/10.32747/1999.7695838.bard.
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Original objectives: The basic goal of the present project was to increase our understanding of the cellular mechanisms operating during the gravitropic response of cut flowers, for solving their bending problem without affecting flower quality. Thus, several elements operating at the 3 levels o the gravity-induced signal transduction pathway, were proposed to be examined in snapdragon stems according to the following research goals: 1) Signaling: characterize the signal transduction pathway leading to the gravitropic response, regarding the involvement of [Ca2+]cyt as a mediator of IAA movement and sensitivity to auxin. 2) Transduction by plant hormones: a) Examine the involvement of auxin in the gravitropic response of flower stems with regard to: possible participation of auxin binding protein (ABP), auxin redistribution, auxin mechanism of action (activation of H+-ATPase) mediation by changes in [Ca2+]cyt and possible regulation of auxin-induced Ca2+ action b: calmodulin-activated or Ca2+-activated protein kinases (PK). b) Examine the involvement of ethylene in the gravitropic response of flower stems with regard to auxin-induced ethylene production and sensitivity of the tissue to ethylene. 3) Response: examine the effect of gravistimulation on invertase (associated with growth and elongation) activity and invertase gene expression. 4) Commercial practice: develop practical and simple treatments to prevent bending of cut flowers grown for export. Revisions: 1) Model systems: in addition to snapdragon (Antirrhinum majus L.), 3 other model shoe systems, consisting of oat (Avena sativa) pulvini, Ornithogalun 'Nova' cut flowers and Arabidopsis thaliana inflorescence, were targeted to confirm a more general mechanism for shoot gravitropism. 2 Research topics: the involvement of ABP, auxin action, PK and invertase in the gravitropic response of snapdragon stems could not be demonstrated. Alternatively, the involvement in the gravity signaling cascade of several other physiological mediators apart of [Ca2+]cyt such as: IP3, protein phosphorylation and actin cytoskeleton, was shown. Additional topics introduced: starch statolith reorientation, differential expression of early auxin responsive genes, and differential shoot growth. Background to the topic: The gravitropic bending response of flowering shoots occurring upon their horizontal placement during shipment exhibits a major horticultural problem. In spite of extensive studies in various aboveground organs, the gravitropic response was hardly investigated in flowering shoots. Being a complex multistep process that requires the participation of various cellular components acting in succession or in parallel, analysis of the negative gravitropic response of shoot includes investigation of signal transduction elements and various regulatory physiological mediators. Major achievements: 1) A correlative role for starch statoliths as gravireceptors in flowering shoot was initially established. 2) Differentially phosphorylated proteins and IP3 levels across the oat shoe pulvini, as well as a differential appearance of 2 early auxin-responsive genes in snapdragon stems were all detected within 5-30 minutes following gravistimulation. 3) Unlike in roots, involvement of actin cytoskeleton in early events of the gravitropic response of snapdragon shoots was established. 4) An asymmetric IAA distribution, followed by an asymmetric ethylene production across snapdragon stems was found following gravistimulation. 5) The gravity-induced differential growth in shoots of snapdragon was derived from initial shrinkage of the upper stem side and a subsequent elongation o the lower stem side. 6) Shoot bending could be successfully inhibited by Ca2+ antagonists (that serve as a basis for practical treatments), kinase and phosphatase inhibitors and actin-cytoskeleton modulators. All these agents did not affect vertical growth. The essential characterization of these key events and their sequence led us to the conclusion that blocking gravity perception may be the most powerful means to inhibit bending without hampering shoot and flower growth after harvest. Implications, scientific and agriculture: The innovative results of this project have provided some new insight in the basic understanding of gravitropism in flower stalks, that partially filled the gap in our knowledge, and established useful means for its control. Additionally, our analysis has advanced the understanding of important and fundamental physiological processes involved, thereby leading to new ideas for agriculture. Gravitropism has an important impact on agriculture, particularly for controlling the bending of various important agricultural products with economic value. So far, no safe control of the undesired bending problem of flower stalks has been established. Our results show for the first time that shoot bending of cut flowers can be inhibited without adverse effects by controlling the gravity perception step with Ca2+ antagonists and cytoskeleton modulators. Such a practical benefit resulting from this project is of great economic value for the floriculture industry.
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Water-quality assessment of the Upper Mississippi River Basin, Minnesota and Wisconsin- Polychlorinated biphenyls in common carp and walleye fillets, 1975-95. US Geological Survey, 1998. http://dx.doi.org/10.3133/wri984126.
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COMPLETE SET CONSTRUCTION TECHNOLOGY OF LARGE OPENING CABLE DOME STRUCTURE BASED ON INTEGRATED ANALYSIS. The Hong Kong Institute of Steel Construction, août 2022. http://dx.doi.org/10.18057/icass2020.p.312.
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With the development of design level and construction technology of cable supported system, various new-type prestressed structures emerge, and a number of public buildings with cable dome structure have been constructed. The structural characteristics and complete set construction technology of Chengdu Phoenix Mountain Stadium are introduced in this paper. In view of the construction difficulties, nonlinear dynamic analysis method was used to carry out simulation of the whole construction process and optimize the construction scheme. The research was carried out from the aspects of rotary lifting technology, horizontal restraint system and high anti-side lifting frame group. Besides, the design and construction integrated analysis of the large opening cable dome structure was carried out, and the construction technology of " internal tension ring-cable net integrated lifting " was innovatively proposed. This method fills the blank of the construction method of the system, greatly improves the construction efficiency, and ensures the construction quality and safety.