Food Additives and Contaminants Part A-chemistry Analysis Control Exposure & Risk Assessment最新文献

{"title":"Characteristics of heavy metal migration from virgin PET and recycled PET plastic bottles in beverage products.","authors":"Ratih Dewi Sujana, Hanifah Nuryani Lioe, Nugraha Edhi Suyatma","doi":"10.1080/19440049.2024.2428745","DOIUrl":"https://doi.org/10.1080/19440049.2024.2428745","url":null,"abstract":"<p><p>Polyethylene terephthalate (PET) is one of the most commonly used packaging materials for beverages. The increased use of PET has contributed to the rise in plastic waste. Recycled PET (R-PET) is a solution to address this environmental issue. This study aims to determine the migration level of Pb, Cd, Hg, and Sb in PET bottles, evaluate the effect of plastic types (virgin PET and R-PET) and testing conditions (according to BPOM following national regulation and EU following international regulation) on the migration from heavy metals into food. Sixty test samples of virgin PET and R-PET bottles, obtained from four packaging industries in Indonesia, were analyzed for Cd, Hg, Pb, and Sb concentrations using ICP-MS. The results showed that the highest concentrations of heavy metal migration for Cd and Pb were in a virgin PET sample according to BPOM, respectively, at 28 ± 2 ng/L and 636 ± 22 ng/L. Meanwhile, the highest concentrations of Hg and Sb were in a R-PET sample according to EU, respectively, at 469 ± 91 ng/L and 5042 ± 617 ng/L. There was a significant difference in heavy metal levels between the two types of plastic (virgin PET and R-PET) and two testing conditions (BPOM and EU). However, all the obtained concentrations were below the permitted limits of national and EU regulations.</p>","PeriodicalId":12295,"journal":{"name":"Food Additives and Contaminants Part A-chemistry Analysis Control Exposure & Risk Assessment","volume":" ","pages":"1-8"},"PeriodicalIF":2.3,"publicationDate":"2024-12-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142828166","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Grazing sheep on pastures with tansy ragwort (<i>Senecio jacobaea</i> L.) - results of a two-year study on ingested pyrrolizidine alkaloids and transfer into animal organs.","authors":"Sabine Aboling, Susanne Ohlsen, Aiko Huckauf, Julian Tänzer, Anja These, Robert Pieper, Marie-Lena Hass, Nikola Lenzewski, Martin Ganter","doi":"10.1080/19440049.2024.2435325","DOIUrl":"https://doi.org/10.1080/19440049.2024.2435325","url":null,"abstract":"<p><p>Tansy ragwort (<i>Senecio jacobaea</i> L.) growing in animal pasture may pose a risk to humans due to the potential transfer of pyrrolizidine alkaloids (PAs) into food of animal origin. Here, we investigated what amount of PAs corresponds to the amount of ragwort consumed by sheep on a pasture and whether the ingested PAs are transferred into edible tissue. From 2020 to 2021, a field study was conducted with 70 sheep grazing on a pasture (stocking density of 12 sheep/hectare) with considerable quantities of tansy ragwort. After slaughter, blood samples were taken for analysis of liver enzyme activities and haemoglobin concentration. Samples of ruminal fluid, liver and diaphragm pillar were analysed for PAs. The amount of ingested ragwort was determined by counting missing plant parts and calculating their weight using reference material. The mean daily intake of ragwort per sheep ranged from 0.16 kg to 4.89 kg fresh matter and corresponded to PA doses from 0.3 to 40.9 mg/kg body weight with no effect on the liver enzyme activities. The PA concentrations in the animal tissue were between the limit of detection and a maximum of 8.0 µg/kg in the liver and 2.5 µg/kg in muscle. These data suggest that the risk is negligible of exposure to PAs through consumption of meat or liver.</p>","PeriodicalId":12295,"journal":{"name":"Food Additives and Contaminants Part A-chemistry Analysis Control Exposure & Risk Assessment","volume":" ","pages":"1-12"},"PeriodicalIF":2.3,"publicationDate":"2024-12-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142799991","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"A rapid and high-throughput fraud detection method of Philippine coconut wine (<i>lambanog</i>) using ¹H qNMR spectroscopy.","authors":"Harriet Jane R Caleja-Ballesteros, Joel I Ballesteros","doi":"10.1080/19440049.2024.2435327","DOIUrl":"https://doi.org/10.1080/19440049.2024.2435327","url":null,"abstract":"<p><p>Methanol contamination of the Philippine coconut spirit <i>lambanog</i> (often called coconut wine) is the major cause of <i>lambanog</i>-related deaths in the country. Hence, a strict quality control and detection method must be established for methanol in tandem with ethanol analysis. In this study, a quantitative Nuclear Magnetic Resonance spectroscopy (qNMR) method using ¹H analysis was developed to quantify the methanol and ethanol in 26 <i>lambanog</i> samples collected from four different provinces in Luzon, Philippines. A certified qNMR standard was used as an internal standard for the ¹H NMR analyses to increase the accuracy of the measurements. The calculated limit of detection and limit of quantification of methanol with values of 0.076%(v/v) and 0.25%(v/v), respectively, were sufficiently low and allow the monitoring of methanol within the acceptable safety level. Moreover, the results of methanol and ethanol analysis using the proposed method were in good agreement with those obtained from GC-FID analysis which is the conventional method for alcohol analysis. In contrast to GC-FID, the qNMR method for simultaneous alcohol analysis can provide results in a shorter period. The results of this study show the potential of the qNMR method to be used as an alternative analytical method which widens the range of analytical possibilities to detect methanol in <i>lambanog</i> samples for the safety of the consumers.</p>","PeriodicalId":12295,"journal":{"name":"Food Additives and Contaminants Part A-chemistry Analysis Control Exposure & Risk Assessment","volume":" ","pages":"1-10"},"PeriodicalIF":2.3,"publicationDate":"2024-12-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142799988","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Development of a direct competitive enzyme-linked immunosorbent assay (dc-ELISA) for the detection of scopolamine in wheat.","authors":"Gurmit Singh, Ligia Velasquez, Terence Koerner, Anne-Catherine Huett, Nathalie Gillard","doi":"10.1080/19440049.2024.2435335","DOIUrl":"https://doi.org/10.1080/19440049.2024.2435335","url":null,"abstract":"<p><p>A competitive direct enzyme-linked immunosorbent assay (dc-ELISA) was developed for the detection and quantification of scopolamine (SCO) in wheat flours and cereal samples (multigrain, oat and barley). The limit of quantification (IC₂₀) of the established method was 6.00 ± 1.20 ng/g, with the limit of detection (IC₁₀) being 2.4 ± 0.6 ng/g in wheat flour with a coefficient of variation (CV) less than 20%. The assay was highly specific to SCO and nor-scopolamine, with no cross-reactivity to other similar structures. In spiked wheat flours the recoveries ranged from 84% to 104% with CVs of less than 20% and the recovery from a Food Analysis Performance Assessment Scheme (FAPAS) buckwheat control sample was 118%. A comparison of spiked wheat flour and a FAPAS control sample showed similar results to those determined by classical LC-MS/MS methods. A small retail survey of wheat flours and cereal samples was conducted using this ELISA method and a LC-MS/MS method, which showed scopolamine was not detected in any of these survey samples by either method. This method is suitable for rapid quantitation of SCO in wheat flours and cereal samples.</p>","PeriodicalId":12295,"journal":{"name":"Food Additives and Contaminants Part A-chemistry Analysis Control Exposure & Risk Assessment","volume":" ","pages":"1-9"},"PeriodicalIF":2.3,"publicationDate":"2024-12-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142789448","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Comparative assessment of commercial ELISA kits for the screening of chloramphenicol residues in meat and aquaculture products according to European Regulation (EU) 2021/808 and to the new Reference Point for Action (Commission Regulation (EU) 2019/1871).","authors":"Lucille Rousseau, Romain Ménager, Céline Hédou, Eric Verdon, Christophe Soumet, Valérie Gaudin","doi":"10.1080/19440049.2024.2435326","DOIUrl":"https://doi.org/10.1080/19440049.2024.2435326","url":null,"abstract":"<p><p>This study covered the evaluation of performance characteristics and validation of five commercial ELISA kits for the detection of a banned antimicrobial, chloramphenicol (CAP), in muscle and aquaculture products. CAP has been banned in the European Union since 1994, but is still authorised in some countries in the world. In 2019, the European Union set a new Reference Point for Action (RPA), decreasing the acceptable limit of CAP in animal tissues for human consumption from 0.30 µg/kg to 0.15 µg/kg. Validations were performed according to the European Regulation EC/2021/808 and to the European Guideline on Screening Method Validation (2023). The detection capabilities CCβ were all determined under the RPA, but were 3 to 15 times higher than the announced limit of detection (LOD). False negative rates were satisfactory for all the kits (≤ 5%) and false positive rates were acceptable. All of them were found out to be applicable to aquaculture products and meat at a common CCβ.</p>","PeriodicalId":12295,"journal":{"name":"Food Additives and Contaminants Part A-chemistry Analysis Control Exposure & Risk Assessment","volume":" ","pages":"1-12"},"PeriodicalIF":2.3,"publicationDate":"2024-12-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142767655","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Occurrence of ochratoxins in coffee and risk assessment of ochratoxin a in a Costa Rican urban population.","authors":"Daniela Jaikel-Viquez, Fabio Granados, Alejandra Gómez-Arrieta, Josué Vásquez-Flores, Fernando Morales-Calvo, Nicole Argeñal-Avendaño, Delia Álvarez-Corvo, Graciela Artavia, Georgina Gómez-Salas, Bing Wang, Mauricio Redondo-Solano","doi":"10.1080/19440049.2024.2429140","DOIUrl":"https://doi.org/10.1080/19440049.2024.2429140","url":null,"abstract":"<p><p>Costa Rica is a coffee producer and consumer country, but this product is prone to ochratoxin contamination; therefore, this study aims evaluates the human health risk associated with ochratoxin exposure among coffee consumers in the Costa Rica. Ochratoxin A (OTA) is a nephrotoxic compound classified as a Group 2B carcinogen, produced by the fungi <i>Aspergillus</i> section <i>Circumdati</i>, <i>Aspergillus</i> section <i>Nigri</i> and <i>Penicillium</i> spp.  The presence of OTA and ochratoxin B (OTB) in Costa Rican coffee products (<i>n</i> = 175) was determined by HPLC with fluorescence detection. OTA was detected in 58.2% of the green coffee beans (1.01 ± 0.85 ng g ^-1), in 36.8% of the pure roasted coffee (2.59 ± 4.41 ng g ^-1), in 23.1% of the sugar-added roasted coffee (1.59 ± 0.33 ng g^-1) and 75% of the instant coffee samples (0.69 ± 0.58 ng g^-1). The contamination with OTB was 45.5% (1.28 ± 0.83 ng g ^-1), 31.6% (1.60 ± 2.04 ng g ^-1), 30.8% (1.42 ± 0.86 ng g ^-1), and 41.7% (2.64 ± 2.07 ng g ^-1), respectively. The dietary exposure to OTA of the Costa Rican population was assessed by a probabilistic approach. The mean estimated daily intake (EDI) of OTA from coffee was: 0.184 (90% IC: 0.179-0.189) ng kg^-1 bw day^-1 for the total population (0.189 [90% IC: 0.184-0.194] ng kg^-1 bw day^-1 for males and 0.181 [90% IC: 0.176-0.186] ng kg^-1 bw day^-1 for females).  The EDIs were lower than the tolerable human intake benchmarks for OTA set by international food safety authorities (even though more than 80% of OTA is extracted during coffee preparation). The results evidence a low risk (related to ochratoxin) for coffee consumers in Costa Rica.</p>","PeriodicalId":12295,"journal":{"name":"Food Additives and Contaminants Part A-chemistry Analysis Control Exposure & Risk Assessment","volume":" ","pages":"1-14"},"PeriodicalIF":2.3,"publicationDate":"2024-12-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142767657","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Antioxidant packaging films based upon starch-montmorillonite with forsythia flower extract: characterization and application.","authors":"Lilin Zhang, Minghui Zhang, Hongyan Chen","doi":"10.1080/19440049.2024.2408739","DOIUrl":"10.1080/19440049.2024.2408739","url":null,"abstract":"<p><p>Plastic pollution is one of the most acute environmental problems in the world, so active packaging materials made from biodegradable natural polymers have received widespread attention in recent years. In this paper, forsythia flower extract, serving as an active ingredient, was integrated into the starch-sodium alginate-montmorillonite composite film. The physicochemical properties and functional packaging applications of the composite films were investigated. The results demonstrate the formation of a tightly-knit network structure through molecular interactions among forsythia flowers, starch, sodium alginate, and montmorillonite. Notably, the addition of forsythia flower extracts conferred better UV resistance (from 200 nm to 400 nm) and outstanding antioxidant properties to the composite films. After 18 days of storage, in comparison with the control group, the decay rate of fresh cherry tomatoes packaged with the composite film containing forsythia flower extract showed a significant reduction of 40%, the hardness increased by 25%, and the content of vitamin C was enhanced by 33%. Hence, the forsythia flower extract composite film offers a novel perspective for the design and development of bio-based packaging films for preserving fresh fruits. The results serve as a foundation for the subsequent advancement and application of forsythia flower in the field of packaging.</p>","PeriodicalId":12295,"journal":{"name":"Food Additives and Contaminants Part A-chemistry Analysis Control Exposure & Risk Assessment","volume":" ","pages":"1679-1691"},"PeriodicalIF":2.3,"publicationDate":"2024-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142344408","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Sustainable dairy farming and fipronil risk in circular feeds: insights from an Italian case study.","authors":"Mara Gasparini, Gianfranco Brambilla, Simonetta Menotta, Giovanni Albrici, Valeriano Avezzù, Roberta Vitali, Giovanni Buonaiuto, Martina Lamanna, Damiano Cavallini","doi":"10.1080/19440049.2024.2414954","DOIUrl":"10.1080/19440049.2024.2414954","url":null,"abstract":"<p><p>Circular feeds, such as grain dry distillers, citrus pulp, cane molasses, and potatoes peels, are co-products of biomass processes. They are currently proposed in animal nutrition to improve the environmental and economic sustainability of the food production chain. In this paper, we report a case study involving fipronil, a pesticide currently not authorized for agriculture within the EU, but used in the Americas, Eastern Europe, and Asia. Fipronil was found at a mean level of 0.49 mg/kg, in a grain dry distiller batch administered to dairy cows. This finding, along with other evidence of potential fipronil presence in feed materials, prompted us to evaluate the risk to food safety and food security from 12 different conventional and sustainable feeding regimens. To this purpose, we considered a fipronil feed-to-milk carry-over rate of 0.52, the tolerance levels in fodders and food from The EU, Codex Alimentarius, and US-EPA, and the Acceptable Daily Intake (ADI) of 0.0002 mg/kg body weight for adverse effects on thyroid function in dairy cows. Under a conservative scenario, fipronil-contaminated potato peels and grain distillers in the feeding regimens may play a pivotal role in exceeding the EU Maximum Residue Level (MRL) in bovine milk and fat (0.005 and 0.030 mg/kg, respectively). Hay-based diets with soybean hulls and cane molasses show negligible risks (Hazard Index ∼ 1). In all cases, the ADI exceedance suggests the need to evaluate thyroid function in dairy cows exposed to fipronil as a food security factor.</p>","PeriodicalId":12295,"journal":{"name":"Food Additives and Contaminants Part A-chemistry Analysis Control Exposure & Risk Assessment","volume":" ","pages":"1582-1593"},"PeriodicalIF":2.3,"publicationDate":"2024-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142497786","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Analysis of PFAS and further VOC from fluoropolymer-coated cookware by thermal desorption-gas chromatography-mass spectrometry (TD-GC-MS).","authors":"Nancy Wolf, Lina Müller, Sarah Enge, Tina Ungethüm, Thomas J Simat","doi":"10.1080/19440049.2024.2406007","DOIUrl":"10.1080/19440049.2024.2406007","url":null,"abstract":"<p><p>Per- and polyfluoroalkyl substances (PFAS) are used in the production of PTFE based coatings for cookware. In this study, emission of PFAS and further volatile organic compounds (VOC) from kitchenware articles were investigated. First, method development for thermal extraction of baking trays, frying pans and baking mats at 250 °C was done by testing three different extraction devices. A thermal desorption oven showed the best blank and highest recoveries of PFAS analytes (70-101% for 12 perfluorocarboxylic acids (PFCAs), 2 fluorotelomer alcohls (FTOHs), 3 per- and polyfluoroether carboxylic acids (PFECAs), 1 polyfluoroether (PFE)). Second, 18 cookware samples, a PTFE micro powder and 2 lab made coating strips have been investigated. No PFAS were detected in 12 samples (limits of detection: 1-13 ng/dm²). PFCAs (C5-C23) were detected in a baking tray in amounts up to 34 ng/dm². A baking mat contained 3 ng/dm² PFOA. FTOHs were not detected in the samples. A PFECA (bC7O2) and its hydride (bC6O2H PFE) were detected in one coating intended for use in frying pans. The hydrides of the PFECA mixture, b(C3O1)_nC3 PFECA (Krytox 157FSH), were detected in five baking trays. The PFAS target analytes were not detectable in the five investigated frying pans. Analysing further VOC in the emissions of coatings, 175 compounds could be identified, including alkanes, alkenes, aromatic substances, esters, aldehydes, ketones, ethers, alcohols, carboxylic acids, siloxanes and sulphur, nitrogen, as well as chlorine containing compounds (< 10 µg/dm²). The identified substances cannot be connected to the basic coating polymer of the kitchenware articles, which were PTFE and PES. All samples have undergone a threefold thermal extraction. No substances could be detected in the second and third consecutive extraction, which means that a removal and no new formation of the investigated PFAS as well as the further VOC at 250 °C has occurred.</p>","PeriodicalId":12295,"journal":{"name":"Food Additives and Contaminants Part A-chemistry Analysis Control Exposure & Risk Assessment","volume":" ","pages":"1663-1678"},"PeriodicalIF":2.3,"publicationDate":"2024-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142282768","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"The relationship between the deterioration of frying oil and the generation of hazards during frying.","authors":"Guoyan Liu, Yinyin Wu, Xiaowei Xu, Xiangxin Xu, Li Liang, Jixian Zhang, Chaoting Wen, Youdong Li, Xudong He, Xin Xu, Xiaofang Liu","doi":"10.1080/19440049.2024.2406513","DOIUrl":"10.1080/19440049.2024.2406513","url":null,"abstract":"<p><p>Deep-fat frying gives food a desirable color and flavor but inevitably leads to oil deterioration and production of hazards. In this study, the simultaneous generation of multiple hazards under different frying conditions was investigated, the deterioration of frying oil was evaluated, and finally, their correlation was analyzed. The results showed that as the temperature of frying chicken wings increased from 150 to 190 °C, the levels of acrylamide (AA), heterocyclic amines (HCAs), and polycyclic aromatic hydrocarbons (PAHs) in the oil also increased proportionally. At 190 °C, the fried potato oil contained the highest AA content of 2.60 mg·kg^-1, while the content of HCAs and PAHs was the highest in fried chicken wings oil, with values of 5.06 μg·kg^-1 and 5.18 μg·kg^-1, respectively. 5-Hydroxymethylfurfural was detected only in fried potato oil. Oil quality deteriorated gradually with increasing frying temperature and heating time, as indicated by increased acid value, carbonyl value, and levels of total polar compounds. Overall, the results indicated hazards were positively correlated with oil deterioration, suggesting that oil deterioration contributed to the generation of hazards. This work links hazards and oil deterioration, which is crucial for improving the quality and safety of fried foods, while reducing negative environmental impacts, and achieving clean production.</p>","PeriodicalId":12295,"journal":{"name":"Food Additives and Contaminants Part A-chemistry Analysis Control Exposure & Risk Assessment","volume":" ","pages":"1554-1569"},"PeriodicalIF":2.3,"publicationDate":"2024-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142344410","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}