scholarly journals Geographical Origin Discrimination of White Rice Based on Image Pixel Size Using Hyperspectral Fluorescence Imaging Analysis

2020 ◽  
Vol 10 (17) ◽  
pp. 5794
Author(s):  
Min-Jee Kim ◽  
Jongguk Lim ◽  
Sung Won Kwon ◽  
Giyoung Kim ◽  
Moon S. Kim ◽  
...  
Keyword(s):  
Fluorescence Imaging ◽  
Geographical Origin ◽  
Hyperspectral Image ◽  
Pixel Size ◽  
Discrimination Accuracy ◽  
Excitation Light ◽  
White Rice ◽  
South Korean ◽  
High Discrimination ◽  
Rice Samples

Geographical origin discrimination of white rice is an important endeavor in preventing illegal distribution of white rice and regulating and standardizing food safety and quality assurance. The aim of this study was to develop a method for geographical origin discrimination between South Korean and Chinese rice using a hyperspectral fluorescence imaging technique and multivariate analysis. Hyperspectral fluorescence images of South Korean and Chinese rice samples were obtained in the wavelength range of 420 nm to 780 nm with intervals of 4.8 nm using 365 nm wavelength ultraviolet-A excitation light. Partial least squares discriminant analysis models were developed and applied to the acquired image to determine the geographical origins of the rice samples. In addition, various pre-processing techniques were applied to improve the discrimination accuracy. Accordingly, the pixel size of the hyperspectral image was determined. The results revealed that the optimum pixel size of the hyperspectral image that was above 7 mm × 7 mm showed a high discrimination accuracy. Moreover, the geographical origin discrimination model that applied the first-order derivative achieved a high discrimination accuracy of 98.89%. The results of this study showed that hyperspectral fluorescence imaging technology can be used to quickly and accurately discriminate the geographical origins of white rice.

scholarly journals Detection of Aflatoxins in Rice Samples

2015 ◽  
Vol 49 (3) ◽  
pp. 189-194 ◽  
Author(s):  
A Nisa ◽  
N Zahra ◽  
S Hina
Keyword(s):  
Protein Metabolism ◽  
Brown Rice ◽  
Dietary Exposure ◽  
Parboiled Rice ◽  
White Rice ◽  
Broken Rice ◽  
The World ◽  
Rice Samples ◽  
Layer Chromatography

Aflatoxins are natural contaminants of cereals and other commodities throughout the world. Chronic dietary exposure even to low doses of aflatoxins is a known risk factor for liver cancer and effect protein metabolism and immunity. The study was carried out on a 1029 samples of brown rice, 1561 samples of white rice, 33 samples of broken rice, 13 samples of Sella rice, 52 samples of parboiled rice of export quality from Pakistan during the years 2006-2010 for determination of Aflatoxin B1, B2, G1 and G2 by Thin Layer Chromatography. 341 (33.13%) samples of white rice, 350 (22.42%) samples of brown rice, 13 (39.39%) samples of broken rice, 25 (24.27%) samples of Sella rice and 14 (26.92%) samples of parboiled rice were found contaminated with B1. B2 was detected in 33 (3.20%) samples of white rice, 23 (1.47%) samples of brown rice and 1(3.03%) samples of broken rice. While G1 is found in 9 (0.8%) samples of white rice, 57 (3.65%) samples of brown rice, 1 (1.5 %) samples of parboiled rice. Aflatoxin G2 was absent in all samples. DOI: http://dx.doi.org/10.3329/bjsir.v49i3.22134 Bangladesh J. Sci. Ind. Res. 49(3), 189-194, 2014

Quantitative imaging of lymph function

2007 ◽  
Vol 292 (6) ◽  
pp. H3109-H3118 ◽  
Author(s):  
Ruchi Sharma ◽  
Wei Wang ◽  
John C. Rasmussen ◽  
Amit Joshi ◽  
Jessica P. Houston ◽  
...  
Keyword(s):  
Fluorescence Imaging ◽  
Near Infrared ◽  
Quantitative Imaging ◽  
Imaging Agents ◽  
Excitation Light ◽  
Lymph Vessels ◽  
Intradermal Administration ◽  
Nir Fluorescence ◽  
Lymph Endothelium ◽  
Lymphatic Imaging

Functional lymphatic imaging was demonstrated in the abdomen and anterior hindlimb of anesthetized, intact Yorkshire swine by using near-infrared (NIR) fluorescence imaging following intradermal administration of 100–200 μl of 32 μM indocyanine green (ICG) and 64 μM hyaluronan NIR imaging conjugate to target the lymph vacular endothelial receptor (LYVE)-1 on the lymph endothelium. NIR fluorescence imaging employed illumination of 780 nm excitation light (∼2 mW/cm2) and collection of 830 nm fluorescence generated from the imaging agents. Our results show the ability to image the immediate trafficking of ICG from the plexus, through the vessels and lymphangions, and to the superficial mammary, subiliac, and middle iliac lymph nodes, which were located as deep as 3 cm beneath the tissue surface. “Packets” of ICG-transited lymph vessels of 2–16 cm length propelled at frequencies of 0.5–3.3 pulses/min and velocities of 0.23–0.75 cm/s. Lymph propulsion was independent of respiration rate. In the case of the hyaluronan imaging agent, lymph propulsion was absent as the dye progressed immediately through the plexus and stained the lymph vessels and nodes. Lymph imaging required 5.0 and 11.9 μg of ICG and hyaluronan conjugate, respectively. Our results suggest that microgram quantities of NIR optical imaging agents and their conjugates have a potential to image lymph function in patients suffering from lymph-related disorders.

Endoscopic identification and biopsy sampling of an intraventricular malignant glioma using a 5–aminolevulinic acid–induced protoporphyrin IX fluorescence imaging system

2007 ◽  
Vol 106 (3) ◽  
pp. 507-510 ◽  
Author(s):  
Yoji Tamura ◽  
Toshihiko Kuroiwa ◽  
Yoshinaga Kajimoto ◽  
Yoshihito Miki ◽  
Shin-Ichi Miyatake ◽  
...  
Keyword(s):  
Brain Tumor ◽  
Malignant Glioma ◽  
Fluorescence Imaging ◽  
Aminolevulinic Acid ◽  
Imaging System ◽  
Protoporphyrin Ix ◽  
Intraventricular Tumor ◽  
Excitation Light ◽  
Fluorescence Imaging System ◽  
Cutoff Filter

✓Several neurosurgical studies have provided descriptions of the utility of fluorescence-guided tumor resection using a microscope. However, fluorescence-guided endoscopic detection of a deep-seated brain tumor has not yet been reported. The authors report their experience with an endoscopic biopsy procedure for a malignant glioma within the third ventricle using a 5–aminolevulinic acid (5-ALA)–induced protoporphyrin IX fluorescence imaging system. A 5-ALA–induced fluorescence image of an intraventricular tumor is barely visible with the typical fluorescence endoscopic system used in other clinical fields because the intensity of excitation light at wavelengths of 390 to 405 nm through a cutoff filter is too weak to delineate a brain tumor. The technique described in this study made use of a laser illumination system with a high-powered output that delivered a violet-blue light at wavelengths of 405 nm. In addition, a common ultraviolet cutoff filter was fitted between the endoscope and the high-sensitivity camera to block the backscattered excitation light. A 5-ALA–induced fluorescence endoscopy performed using this system allowed the intraventricular tumor to be clearly visualized as a red fluorescent lesion. Several biopsy specimens obtained from the fluorescent lesion provided a definitive histological diagnosis. The results indicate that this endoscopic system is useful in detecting an intraventricular fluorescent tumor.

scholarly journals Effect of rice cooking methods on postprandial glycaemic response, satiety and palatability, and chewed particle size distribution

2017 ◽  
Author(s):  
Louise Weiwei Lu ◽  
Bernard Venn ◽  
Jun Lu ◽  
John Monro ◽  
Elaine Rush
Keyword(s):  
Blood Glucose ◽  
Blood Glucose Concentration ◽  
Postprandial Blood Glucose ◽  
Cooking Methods ◽  
Parboiled Rice ◽  
White Rice ◽  
Glycaemic Load ◽  
Lower Blood ◽  
Treatment Experiment ◽  
Rice Samples

Background: Globally, hot cooked refined rice is consumed in large quantities and is a major contributor to dietary glycaemic load. This study aimed to compare the glycaemic potency of hot and cold stored parboiled rice to widely available medium grain white rice. Method: Twenty-eight healthy volunteers participated in a three treatment experiment where postprandial blood glucose was measured over 120 minutes after consumption of 140g of rice. Three rice samples were freshly cooked medium-grain white rice, freshly cooked parboiled rice, and parboiled rice stored overnight at 4 ºC. All rice was served warm at 65 ºC. Chewing time was recorded. Results: The 24-hours cold-stored and reheated parboiled rice resulted in a 42% and 12% lower blood glucose concentration trajectory than freshly cooked medium-grain white rice and freshly cooked parboiled rice. Chewing time for 10g cold stored parboiled rice was 6 seconds (25%) longer and was considered more palatable, visually appealing and better tasting than freshly cooked medium grain (all P<0.05). Conclusions:. For regular consumers of rice reheating cooked rice after cold storage would lower the dietary glycaemic load and long term may reduce risk for type 2 and gestational diabetes. More trials are needed to identify the significance.

scholarly journals Arsenic contamination survey in white rice in Aceh

2019 ◽  
Vol 4 (2) ◽  
pp. 128
Author(s):  
Farida Hanum ◽  
Dwi Sudiarto ◽  
Noni Zakiah ◽  
Safwan Safwan ◽  
Agus Hendra Al Rahmad
Keyword(s):  
Arsenic Contamination ◽  
Staple Food ◽  
White Rice ◽  
Chemical Hazards ◽  
Test Kit ◽  
Rice Samples

White rice as the major staple food for Indonesian people has the opportunity to be contaminated with chemical hazards. Research in USA shows that arsenic is contained in rice. The arsenic emissions of 75% are estimated to originate from the mining, fertilizers and pesticides. This study aims to determine qualitatively arsenic contamination of white rice consumed by Acehnese people and how to cook it. A total of 30 white rice samples were obtained with purposive technique from the Aceh Health Polytechnic employees who brought breakfast. The the consideration that they come from various regions in Aceh. Arsenic analysis contamination in samples was carried out using arsenic test kit. Data collected is in the form of interviews about white rice cooking techniques and the analysis of arsenic contamination. The results showed that white rice consumed by the employees was safe from arsenic and that the rice cooking technique on a household is feasible. Besides that the arsenic test was also carried out on white rice sold in stalls, the results were positive. This indicates that white rice is consumed by people in Aceh, there are those which are contaminated with arsenic. This study provides evidence that the contamination is still present in rice which has been processed into rice cooked.  Keywords:   ABSTRAKNasi putih sebagai salah satu sumber makanan pokok di Indonesia memiliki peluang tercemar bahan kimia yang sangat berbahaya. Penelitian di USA menunjukkan bahwa arsen terkandung di dalam beras, 75% emisi arsen diperkirakan berasal dari aktivitas penambangan, pemupukan dan pestisida. Penelitian ini bertujuan untuk mengetahui cemaran arsen secara kualitatif pada nasi putih di Aceh dan bagaimana teknik memasaknya. Penelitian ini merupakan survey deskriptif berbasis laboratorium. Populasi adalah seluruh pegawai Poltekkes Kemenkes Aceh. Sebanyak 30 sampel nasi putih dicuplik secara purposif dari 30 orang pegawai yang membawa bekal sarapannya. Pertimbangan bahwa mereka berasal dari berbagai daerah di Aceh. Analisis arsen menggunakan arsen test kit. Data primer dikumpulkan dari hasil wawancara tentang teknik memasak nasi putih dan hasil analisis arsen pada nasi putih. Hasil penelitian menunjukkan bahwa nasi putih yang dikonsumsi oleh pegawai Poltekkes Kemenkes Aceh aman dari cemaran arsen. Hasil ini menegaskan bahwa teknik memasak nasi pada skala rumah tangga dapat menghasilkan nasi putih yang bebas dari cemaran kimia arsen. Analisis arsen juga dilakukan pada nasi putih yang dijual di warung sebagai pembanding, hasilnya positif. Ini menunjukkan bahwa nasi putih yang dikonsumsi oleh masyarakat Aceh, ada yang tercemar arsen. Penelitian ini membuktikan bahwa cemaran arsen masih ada pada beras yang telah diolah menjadi nasi.

scholarly journals A miniaturized fluorescence imaging device for rapid early skin cancer detection

2020 ◽  
pp. 2050026
Author(s):  
Jingyue Pan ◽  
Qingquan Liu ◽  
Hao Sun ◽  
Weibo Zheng ◽  
Peiru Wang ◽  
...  
Keyword(s):  
Skin Cancer ◽  
Fluorescence Imaging ◽  
Light Source ◽  
Skin Tumors ◽  
Diagnostic Methods ◽  
Total Power ◽  
Exciting Light ◽  
Excitation Light ◽  
Imaging Device ◽  
Skin Cancer Detection

Fluorescence imaging is very useful for skin cancer lesions detection because of its properties of noninvasion and fast imaging. However, conventional fluorescence imaging devices’ excitation light source and camera are usually separated, which will cause problems such as complicated structure, large volume, and poor illumination homogeneity. In this paper, we introduce a miniature portable fluorescence imaging device to diagnose skin cancer. A coaxial design has been introduced to combine the exciting light source and fluorescence receiver as an integral part, which significantly reduces the size of the device and ensures illumination homogeneity. The volume of the device is less than [Formula: see text][Formula: see text]cm3 with weight of 150[Formula: see text]g, and the total power (including the excitation lamp) is only 1.5 W. It is used to detect the squamous cell carcinoma mice for demonstration. The results show that the location of the cancer lesions can be easily distinguished from the images captured by the device. It can be efficiently used to detect early skin tumors with noninvasion. It also has prospects to be integrated with other diagnostic methods such as ultrasound probe, for multiple diagnose of skin tumors thanks to its miniature size.

scholarly journals Integrated ultrasonic particle positioning and low excitation light fluorescence imaging

2013 ◽  
Vol 103 (24) ◽  
pp. 244103 ◽  
Author(s):  
A. L. Bernassau ◽  
M. Al-Rawhani ◽  
J. Beeley ◽  
D. R. S. Cumming
Keyword(s):  
Fluorescence Imaging ◽  
Excitation Light ◽  
Light Fluorescence
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