In the process of food testing,human operation is an important variable affecting the experimental results.In order to reasonably avoid the influence of human subjective operation behavior on the accuracy of detection...In the process of food testing,human operation is an important variable affecting the experimental results.In order to reasonably avoid the influence of human subjective operation behavior on the accuracy of detection results,the laboratory information management system was used as the information platform to design a high-throughput laboratory automation pre-treatment system based on the deep integration of mechanical principles,visual analysis,high-speed conduction,intelligent storage and other technical systems.The experimental results showed that the system could shorten the sample circulation cycle,effectively improve the laboratory biosafety,and meet the requirements of high-throughput processing of samples.展开更多
Based on the analysis of food testing standards (according to parameters, categories and methods), this paper puts forward an integrated reference method for food testing standards. At the same time, the innovation of...Based on the analysis of food testing standards (according to parameters, categories and methods), this paper puts forward an integrated reference method for food testing standards. At the same time, the innovation of food testing methods puts forward some "normal" requirements from aspects of coverage, recovery rate and consistency with determination standards.展开更多
With the continuous improvement of people's quality of life, people are paying more and more attention to food safety issues, the government departments are also paying more and more attention to the intensity of ...With the continuous improvement of people's quality of life, people are paying more and more attention to food safety issues, the government departments are also paying more and more attention to the intensity of food inspection work, so as to provide material basis for people's daily life. Food safety is closely related to human health, so the importance of food inspection is becoming more and more obvious. In particular, it has raised concerns at all levels of society, such as the application of measurement controls to food quality and safety inspections. Therefore, this paper explains the role of measurement in food quality and safety testing and the application of measurement control in food quality testing.展开更多
Measurements of the potassium content of samples of food, performed with High Purity Germanium detectors, are presented in this paper. The potassium content was measured by identifying the 1460 keV photons produced in...Measurements of the potassium content of samples of food, performed with High Purity Germanium detectors, are presented in this paper. The potassium content was measured by identifying the 1460 keV photons produced in the decay of the isotope 40K. Samples were selected, for which a high potassium content was expected. The measurements confirmed the expectations qualitatively, but not always quantitatively. Especially the expected dependence of the potassium content of chocolate on the listed percentage of cacao could not be confirmed.展开更多
In the field of food safety testing,variety,brand,origin,and adulteration are four important factors.In this study,a novel food safety testing method based on infrared spectroscopy is proposed to investigate these fac...In the field of food safety testing,variety,brand,origin,and adulteration are four important factors.In this study,a novel food safety testing method based on infrared spectroscopy is proposed to investigate these factors.Fourier transform infrared spectroscopy data are analyzed using negentropy-sorted kernel independent component analysis(NS-kICA)as the feature optimization method.To rank the components,negentropy is performed to measure the non-Gaussian independent components.In our experiment,the proposed method was run on four datasets to comprehensively investigate the variety,brand,origin,and adulteration of agricultural products.The experimental results show that NS-kICA outperforms conventional feature selection methods.The support vector machine model outperforms the backpropagation artificial neural network and partial least squares models.The combination of NS-kICA and support vector machine(SVM)is the best method for achieving high,stable,and efficient recognition performance.These findings are of great importance for food safety testing.展开更多
AIM: To assess values of 24-h esophageal pH-monitoring parameters with dual-channel probe (distal and proximal channel) in children suspected of gastroesophageal reflux disease (GERD). METHODS: 264 children suspected ...AIM: To assess values of 24-h esophageal pH-monitoring parameters with dual-channel probe (distal and proximal channel) in children suspected of gastroesophageal reflux disease (GERD). METHODS: 264 children suspected of gastroesophageal reflux (GER) were enrolled in a study (mean age χ = 20.78 ± 17.23 mo). The outcomes of this study, immunoallerrgological tests and positive result of oral food challenge test with a potentially noxious nutrient, enabled to qualify children into particular study groups. RESULTS: 32 (12.1%) infants (group 1) had physiological GER diagnosed. Pathological acid GER was confirmed in 138 (52.3%) children. Primary GER was diagnosed in 76 (28.8%) children (group 2) and GER secondary to allergy to cow milk protein and/or other food (CMA/FA) in 62 (23.5%) children (group 3). 32 (12.1%) of them had CMA/FA (group 4-reference group), and in remaining 62 (23.5%) children neither GER nor CMA/FA was confirmed (group 5). Mean values of pH monitoring parameters measured in distal and proximal channel were analyzed in individual groups. This analysis showed statistically significant differentiation of mean values in the case of: number of episodes of acid GER, episodes of acid GER lasting > 5 min, duration of the longest episode of acid GER in both channels, acid GER index total and supine in proximal channel. Statistically significant differences of mean values among examined groups, especially between group 2 and 3 in the case of total acid GER index (only distal channel) were confirmed. CONCLUSION: 24-h esophageal pH monitoring confirmed pathological acid GER in 52.3% of children with typical and atypical symptoms of GERD. The similar pH-monitoring values obtained in group 2 and 3 confirm the necessity of implementation of differential diagnosis for primary vs secondary cause of GER.展开更多
The society promotes the continuous development of science and technology,and people’s living materials have also gradually improved.At the same time,more attention is paid to the safety performance problems such as ...The society promotes the continuous development of science and technology,and people’s living materials have also gradually improved.At the same time,more attention is paid to the safety performance problems such as food inspection and inspection,which is related to the people’s food first,especially the safety and quality problems of food will cause safety risks to the body.Combined with the sampling inspection process of relevant food testing departments,we attach great importance to the sampling inspection and detection of food,effectively reduce the risk of food safety,avoid the risk of social life caused by the food safety problems and the credibility of essential quality of food,explore and research from a scientific point of view.The quality control process of physical and chemical inspection and other related technology and quality control process lay the foundation of food safety guarantee for people’s living and working in peace and contentment.展开更多
文摘In the process of food testing,human operation is an important variable affecting the experimental results.In order to reasonably avoid the influence of human subjective operation behavior on the accuracy of detection results,the laboratory information management system was used as the information platform to design a high-throughput laboratory automation pre-treatment system based on the deep integration of mechanical principles,visual analysis,high-speed conduction,intelligent storage and other technical systems.The experimental results showed that the system could shorten the sample circulation cycle,effectively improve the laboratory biosafety,and meet the requirements of high-throughput processing of samples.
文摘Based on the analysis of food testing standards (according to parameters, categories and methods), this paper puts forward an integrated reference method for food testing standards. At the same time, the innovation of food testing methods puts forward some "normal" requirements from aspects of coverage, recovery rate and consistency with determination standards.
文摘With the continuous improvement of people's quality of life, people are paying more and more attention to food safety issues, the government departments are also paying more and more attention to the intensity of food inspection work, so as to provide material basis for people's daily life. Food safety is closely related to human health, so the importance of food inspection is becoming more and more obvious. In particular, it has raised concerns at all levels of society, such as the application of measurement controls to food quality and safety inspections. Therefore, this paper explains the role of measurement in food quality and safety testing and the application of measurement control in food quality testing.
文摘Measurements of the potassium content of samples of food, performed with High Purity Germanium detectors, are presented in this paper. The potassium content was measured by identifying the 1460 keV photons produced in the decay of the isotope 40K. Samples were selected, for which a high potassium content was expected. The measurements confirmed the expectations qualitatively, but not always quantitatively. Especially the expected dependence of the potassium content of chocolate on the listed percentage of cacao could not be confirmed.
基金sponsored by the National Natural Science Foundation of China(31872849)a subproject of major innovation projects in Shandong Province,China(2021TZXD003-003,2021LZGC026-09)+1 种基金Shandong University Youth Entrepreneurship plan team project(2020KJF004)Qingdao Agricultural University High-level Talents Research Fund,China(1119005).
文摘In the field of food safety testing,variety,brand,origin,and adulteration are four important factors.In this study,a novel food safety testing method based on infrared spectroscopy is proposed to investigate these factors.Fourier transform infrared spectroscopy data are analyzed using negentropy-sorted kernel independent component analysis(NS-kICA)as the feature optimization method.To rank the components,negentropy is performed to measure the non-Gaussian independent components.In our experiment,the proposed method was run on four datasets to comprehensively investigate the variety,brand,origin,and adulteration of agricultural products.The experimental results show that NS-kICA outperforms conventional feature selection methods.The support vector machine model outperforms the backpropagation artificial neural network and partial least squares models.The combination of NS-kICA and support vector machine(SVM)is the best method for achieving high,stable,and efficient recognition performance.These findings are of great importance for food safety testing.
基金Supported by Grant of State Committee for Scientific Research (KBN) No 4P05E 04719
文摘AIM: To assess values of 24-h esophageal pH-monitoring parameters with dual-channel probe (distal and proximal channel) in children suspected of gastroesophageal reflux disease (GERD). METHODS: 264 children suspected of gastroesophageal reflux (GER) were enrolled in a study (mean age χ = 20.78 ± 17.23 mo). The outcomes of this study, immunoallerrgological tests and positive result of oral food challenge test with a potentially noxious nutrient, enabled to qualify children into particular study groups. RESULTS: 32 (12.1%) infants (group 1) had physiological GER diagnosed. Pathological acid GER was confirmed in 138 (52.3%) children. Primary GER was diagnosed in 76 (28.8%) children (group 2) and GER secondary to allergy to cow milk protein and/or other food (CMA/FA) in 62 (23.5%) children (group 3). 32 (12.1%) of them had CMA/FA (group 4-reference group), and in remaining 62 (23.5%) children neither GER nor CMA/FA was confirmed (group 5). Mean values of pH monitoring parameters measured in distal and proximal channel were analyzed in individual groups. This analysis showed statistically significant differentiation of mean values in the case of: number of episodes of acid GER, episodes of acid GER lasting > 5 min, duration of the longest episode of acid GER in both channels, acid GER index total and supine in proximal channel. Statistically significant differences of mean values among examined groups, especially between group 2 and 3 in the case of total acid GER index (only distal channel) were confirmed. CONCLUSION: 24-h esophageal pH monitoring confirmed pathological acid GER in 52.3% of children with typical and atypical symptoms of GERD. The similar pH-monitoring values obtained in group 2 and 3 confirm the necessity of implementation of differential diagnosis for primary vs secondary cause of GER.
文摘The society promotes the continuous development of science and technology,and people’s living materials have also gradually improved.At the same time,more attention is paid to the safety performance problems such as food inspection and inspection,which is related to the people’s food first,especially the safety and quality problems of food will cause safety risks to the body.Combined with the sampling inspection process of relevant food testing departments,we attach great importance to the sampling inspection and detection of food,effectively reduce the risk of food safety,avoid the risk of social life caused by the food safety problems and the credibility of essential quality of food,explore and research from a scientific point of view.The quality control process of physical and chemical inspection and other related technology and quality control process lay the foundation of food safety guarantee for people’s living and working in peace and contentment.
