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A multi-case study exploring the effect of interventions on food safety culture maturity 探索干预措施对食品安全文化成熟度影响的多案例研究
IF 7 1区 农林科学 Q1 FOOD SCIENCE & TECHNOLOGY Pub Date : 2024-11-05 DOI: 10.1016/j.foodres.2024.115286
Pauline Spagnoli , Peter Vlerick , Leonie Heijse , Amber Engels , Liesbeth Jacxsens
In each food business, a food safety culture (FSC) with a certain maturity level prevails. Previous research has demonstrated that the maturity level of the prevailing FSC can be assessed, but empirical proof of FSC maturity improvement remains limited especially in food processing companies. This study aimed to zoom in on the food safety culture improvement trajectory of four food processing case studies, focusing on human-organizational dimensions of food safety culture. First, a pre-assessment of the maturity of the prevailing food safety culture was executed in each case company (assessment time 1) by application of a validated mixed-methods methodology which includes three different tools (the food safety climate questionnaire, management interview, and on-site evidence collection visits). Based on this pre-assessment, underdeveloped dimensions or gaps in the prevailing food safety culture were identified to find improvement needs. In each of the 4 included distinct case companies, an intervention was implemented. In the first case company, case 1, a food safety key performance indicator (KPI) system was implemented as the intervention, with shared monitoring and shared responsibilities for KPI improvement. Coincidentally, case company 2 and case company 4 selected the same intervention. Case 2, as well as case 4, decided to implement structured group discussions with operators to collect input for collaborative action point selection, aiming for their active involvement in food safety. In case 3, a food safety culture check system was implemented for systematic reward and recognition. After intervention implementation, the post-assessment was conducted (assessment time 2), applying the exact same methodology as the pre-assessment. To investigate the extent of improvement, comparison of the pre- and post-assessment in each of the four cases was first done descriptively by comparing the means. Next, data collected via the food safety climate questionnaire was compared statistically via Mann-Whitney U tests. Analyses showed a substantial objective and subjective (employees’ perceptions) improvement of the targeted food safety culture gaps in companies 1 and 2, demonstrating that food safety culture improvement was achievable through a science-based and cocreated intervention process and implementation plan compliance. In cases 3 and 4, marginal improvements and unchanged scores were revealed. Comparison of cases’ trajectory characteristics and resulting success rates demonstrated that senior management involvement was essential for interventional success, as well as implementing culture interventions on an organizational or group level, instead of only including selected employees.
在每个食品企业中,都普遍存在着具有一定成熟度的食品安全文化(FSC)。以往的研究表明,现行食品安全文化的成熟度是可以评估的,但食品安全文化成熟度改进的实证证据仍然有限,尤其是在食品加工企业。本研究旨在放大四个食品加工案例研究的食品安全文化改进轨迹,重点关注食品安全文化的人力-组织维度。首先,采用经过验证的混合方法,包括三种不同的工具(食品安全氛围调查问卷、管理层访谈和现场证据收集访问),对每个案例公司现行食品安全文化的成熟度进行预先评估(评估时间 1)。在此预评估的基础上,确定现行食品安全文化中发展不足的方面或差距,以发现改进需求。在 4 个不同的案例公司中,每个公司都实施了一项干预措施。在第一家案例公司,即案例 1 中,实施了食品安全关键绩效指标(KPI)系统作为干预措施,并对关键绩效指标的改进进行共同监督和分担责任。巧合的是,案例 2 和案例 4 选择了相同的干预措施。案例 2 和案例 4 决定与经营者开展有组织的小组讨论,收集他们的意见,以便共同选择行动点,目的是让他们积极参与食品安全工作。案例 3 实施了食品安全文化检查制度,以进行系统的奖励和表彰。干预措施实施后,进行了后评估(评估时间 2),采用的方法与前评估完全相同。为了调查改进的程度,首先通过比较四个案例的前后评估的平均值,对每个案例进行了描述性比较。然后,通过 Mann-Whitney U 检验对食品安全氛围问卷收集的数据进行统计比较。分析表明,1 号和 2 号公司的食品安全文化差距在客观和主观(员工的看法)方面都有了很大的改善,这表明通过科学的、共同创造的干预过程和实施计划的遵守,食品安全文化的改善是可以实现的。在案例 3 和 4 中,则出现了微小的改善和分数不变的情况。对案例的轨迹特征和由此产生的成功率进行比较后发现,高级管理层的参与对干预的成功至关重要,在组织或团体层面实施文化干预也是如此,而不是只包括选定的员工。
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引用次数: 0
Ohmic pasteurization of probiotic chocolate dairy desserts and its quality attributes 益生菌巧克力乳品甜点的欧姆巴氏杀菌法及其质量属性
IF 7 1区 农林科学 Q1 FOOD SCIENCE & TECHNOLOGY Pub Date : 2024-11-05 DOI: 10.1016/j.foodres.2024.115261
Gabriela R.A. Silva , Wanessa P. da Silva , Elson R. Tavares Filho , Louise de A. Sobral , Carolina P.C. Martins , Benjamin Mahieu , Jonas T. Guimarães , Maria Carmela K.H. Duarte , Mônica M. Pagani , Ramon Silva , Monica Q. Freitas , Eliane T. Mársico , Adriano G. Cruz , Erick A. Esmerino
The study evaluated the effects of conventional pasteurization and ohmic heating (OH) at different electric fields (12, 16, 20, or 24 V/cm−1) on probiotic chocolate dairy desserts’ physicochemical, microbiological, sensory properties and volatile profiles. Both treatments were analyzed for parameters such as pH, syneresis, cream stability index, rheology, bioactive compounds (total phenolics and antioxidant capacity), and probiotic viability (Lactobacillus acidophilus LA-05) over a 28-day storage period. Ohmic heating at higher electric fields (20 and 24 V/cm−1) showed comparable results to pasteurization for most parameters, with non-significant differences or even higher values for some. Sensory analysis revealed that pasteurized samples were more associated with “creamy” and “firm” textures. In contrast, OH-treated samples were linked to lumps and fluidity, particularly in OH24 and OH16, respectively. Volatile compounds such as propanal and ethyl propanoate were detected across treatments, with ethyl acetate unique to OH24. The results suggest that OH, especially at higher electric fields, is a promising technology for processing probiotic dairy desserts, offering similar or enhanced qualities compared to conventional pasteurization. These findings provide insights into the potential for OH to be routinely applied in functional dairy product production.
该研究评估了传统巴氏杀菌法和不同电场(12、16、20 或 24 V/cm-1)下的欧姆加热(OH)法对益生菌巧克力奶制品甜点的物理化学、微生物、感官特性和挥发性特征的影响。在 28 天的储存期内,对两种处理方法的 pH 值、滞后性、奶油稳定性指数、流变性、生物活性化合物(总酚和抗氧化能力)和益生菌活力(嗜酸乳杆菌 LA-05)等参数进行了分析。在较高电场(20 和 24 V/cm-1)下进行的欧姆加热在大多数参数上显示出与巴氏杀菌法相当的结果,在某些参数上差异不显著,甚至更高。感官分析表明,巴氏杀菌法处理过的样品更具有 "奶油 "和 "坚硬 "的口感。相比之下,经 OH 处理的样品则与块状和流动性有关,尤其是分别在 OH24 和 OH16 中。在各种处理中都检测到了挥发性化合物,如丙醛和丙酸乙酯,其中乙酸乙酯是 OH24 所特有的。结果表明,OH(尤其是在较高电场下)是一种很有前景的加工益生菌乳制品甜点的技术,与传统的巴氏杀菌法相比,它能提供相似或更好的品质。这些研究结果让我们深入了解了将 OH 常规应用于功能性乳制品生产的潜力。
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引用次数: 0
Impact of porcine brush border membrane enzymes on INFOGEST in vitro digestion model: A step forward to mimic the small intestinal phase 猪刷状边界膜酶对 INFOGEST 体外消化模型的影响:向模拟小肠阶段迈进了一步
IF 7 1区 农林科学 Q1 FOOD SCIENCE & TECHNOLOGY Pub Date : 2024-11-05 DOI: 10.1016/j.foodres.2024.115300
Luigia Di Stasio , Salvatore De Caro , Serena Marulo , Pasquale Ferranti , Gianluca Picariello , Gianfranco Mamone
Brush border membrane (BBM) enzymes greatly affect the bioaccessibility and bioavailability of food nutrients. Despite their physiological importance, a step simulating the final stage of intestinal digestion has not yet been included in the harmonized protocols for in vitro digestion, primarily due to the challenges of replicating the dynamics of intestinal degradation. Herein, we propose an advancement toward a more physiologically relevant method, complementing the harmonized static gastric-duodenal digestion INFOGEST model with the missing small intestinal phase. BBM hydrolase activity, incubation time, at pH 7.2 were established to reproduce the small intestinal conditions. Skim milk powder, as a model of protein food, was subjected to the in vitro static digestion. Immediately after the duodenal phase, digesta were supplemented with BBM vesicles purified from pig jejunum. To comply with the dynamic nature of intestinal digestion and balance the spontaneous inactivation of hydrolases, BBM supplements were added every two hours throughout 6 h incubation time. Peptide degradation was monitored at each stage of digestion by amino acid analysis, free α-amino group assay, HPLC, LC-MS/MS. Hydrolysis by BBM peptidases led to a significant increase of free amino acids, reflecting the known level of amino acid adsorption (>90 %) in humans after eating milk proteins. LC-MS/MS analysis demonstrated that BBM hydrolases erode progressively the peptides released by gastro-duodenal processing up to stable sequence motifs. The approach described is particularly relevant when the endpoint is identifying the peptide sequences that cannot be further hydrolysed by digestive enzymes or to determine the amino acid bio-accessibility.
刷状缘膜酶极大地影响了食物营养素的生物可及性和生物利用率。尽管它们具有重要的生理意义,但模拟肠道消化最后阶段的步骤尚未被纳入体外消化的统一方案中,这主要是由于复制肠道降解动态所面临的挑战。在这里,我们提出了一种更贴近生理学的方法,用缺失的小肠阶段来补充统一的静态胃-十二指肠消化 INFOGEST 模型。在 pH 值为 7.2 的条件下,建立了 BBM 水解酶活性、孵育时间,以再现小肠条件。脱脂奶粉作为蛋白质食物的模型,进行了体外静态消化。十二指肠阶段结束后,消化液中立即添加了从猪空肠中纯化的 BBM 囊泡。为了符合肠道消化的动态特性并平衡水解酶的自发失活,在 6 小时的培养过程中每两小时添加一次 BBM 补充物。通过氨基酸分析、游离α-氨基测定、高效液相色谱、LC-MS/MS 监测消化各阶段的肽降解情况。BBM 肽酶的水解作用导致游离氨基酸显著增加,反映了人类食用牛奶蛋白质后氨基酸吸附的已知水平(90%)。LC-MS/MS 分析表明,BBM 水解酶会逐渐侵蚀胃十二指肠加工过程中释放出的肽,直至形成稳定的序列图案。当最终目的是确定消化酶无法进一步水解的肽序列或确定氨基酸的生物可及性时,所述方法尤为重要。
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引用次数: 0
Enhanced lutein and protein production with improved organoleptic properties in a novel yellow strain of Auxenochlorella pyrenoidosa mutant through atmospheric and room temperature plasma mutagenesis and norflurazon-based screening 通过大气和室温等离子体诱变以及基于诺氟酮的筛选,提高焦绿绿藻新型黄色突变菌株的叶黄素和蛋白质产量,并改善其感官特性
IF 7 1区 农林科学 Q1 FOOD SCIENCE & TECHNOLOGY Pub Date : 2024-11-05 DOI: 10.1016/j.foodres.2024.115288
Xiangru Shi , Qianqian Li , Xiao Chen , Jiayan Xie , Dong Wei
To achieve the triple purpose of enhancing lutein and protein contents as well as improving organoleptic properties in biomass of Auxenochlorella pyrenoidosa mutant as raw material of future food, a novel yellow mutant, CX41 strain, was successfully selected through atmospheric and room temperature plasma (ARTP) mutagenesis and norflurazon-based screening. CX41 strain exhibited a significantly increased lutein (0.86 mg/g) and protein (49.00 % DW) contents simultaneously, while higher levels of total (33.47 % DW) and essential amino acids (14.78 % DW) were achieved with higher amino acid score (86.49) than that of the original A4-1 strain, a yellow and high protein mutant bred previously. Sensory evaluation showed that CX41 biomass has more comparable to A4-1, while in comparison to the wild type (WT), it has a more inclination towards roasted, with a fainter grassy, woody, rancid and fishy odor, and a significant improvement in taste is reflected by a decrease of 8.40 % in sweetness, a reduction of 14.86 % in bitterness, and an increase of 5.93 % in umami intensity. Metabolome analysis revealed that the superior sensory profile was due to the significantly reduced relative odor activity of β-ionone (herbaceous odor) and substances such as 1-octene, hexanal, 1-octen-3-ol, and heptanal (fishy and rancid odors). The extensive enhancements demonstrated CX41 biomass as a highly promising raw material with high nutrients of lutein and protein as well as excellent taste and flavor for future food application.
为了实现提高叶黄素和蛋白质含量以及改善作为未来食品原料的黄绿藻突变体生物质感官特性的三重目的,通过大气和室温等离子体诱变(ARTP)以及基于诺氟酮的筛选,成功选育出一种新型黄色突变体--CX41菌株。与之前培育的黄色高蛋白突变体 A4-1 株系相比,CX41 株系的叶黄素(0.86 毫克/克)和蛋白质(49.00 % DW)含量同时明显增加,总氨基酸(33.47 % DW)和必需氨基酸(14.78 % DW)含量也有所提高,氨基酸得分(86.49)也更高。感官评估显示,CX41 的生物量更接近 A4-1,而与野生型(WT)相比,CX41 更偏向于烘烤,青草味、木质味、馊味和腥味更淡,口感显著改善,甜度降低了 8.40%,苦度降低了 14.86%,鲜味强度提高了 5.93%。代谢组分析表明,感官特征的改善是由于 β-酮(草本气味)和 1-辛烯、己醛、1-辛烯-3-醇和庚醛等物质(腥味和馊味)的相对气味活性显著降低。大量的改进结果表明,CX41 生物质是一种非常有前景的原料,具有高叶黄素和蛋白质营养成分,以及极佳的口感和风味,可用于未来的食品应用。
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引用次数: 0
Changing the horizon of food frying from the use of liquid oil to semi-solid gel 从使用液态油到半固态凝胶,改变食品煎炸的视野
IF 7 1区 农林科学 Q1 FOOD SCIENCE & TECHNOLOGY Pub Date : 2024-11-04 DOI: 10.1016/j.foodres.2024.115290
Harsh B. Jadhav
Deep fat frying is the most adopted process of producing fried food products; it involves mass and heat transfer to form fried products with good colour, crispiness, flavour, taste, and texture. However, frequent consumption of these products is a concern due to higher oil content that poses threats to human health. Hence, there is a need to find an alternative frying medium for deep fat frying of food products to obtain fried products having lower fat content. The structuring of liquid oil to convert it into semi-solid gel by the process of oleogelation forms oleogel. The use of oleogel as a frying medium gives fried products with good oxidative, textural, and sensory attributes. The Oleogelator used in the formulation of oleogel plays a significant role in maintaining the stability of oleogel. An increase in the oleo gelator concentration decreases the oil uptake in the fried product. The superior product quality and high consumer acceptance of oleogel fried products indicate that oleogel is a potential frying medium. The scope of the present review is to cover the heat and mass transfer perspective of the deep fat frying process, factors responsible for oil uptake in fried products, formulation and components of semi-solid system, discussion on various characteristics of semi-solid system as frying medium, comparative assessment of oil uptake in food fried in oleogel and conventional oil and finally covering specific examples showing the efficacy of liquid oil oleogel as a frying medium.
油炸是生产油炸食品最常用的工艺;它涉及质量和热量的传递,使油炸产品具有良好的色泽、酥脆度、风味、口感和质地。然而,由于油脂含量较高,经常食用这些产品会对人体健康造成威胁。因此,有必要寻找一种替代油炸食品的油炸介质,以获得脂肪含量较低的油炸产品。通过油凝胶化过程将液态油转化为半固态凝胶,就形成了油凝胶。使用油凝胶作为油炸介质可使油炸产品具有良好的氧化性、质地和感官特性。配制油凝胶时使用的油凝胶剂对保持油凝胶的稳定性起着重要作用。油凝胶剂浓度的增加会降低油炸产品的吸油量。油凝胶油炸产品的卓越产品质量和较高的消费者接受度表明,油凝胶是一种潜在的油炸介质。本综述的范围包括油炸过程的传热和传质角度、造成油炸产品吸油的因素、半固态系统的配方和成分、讨论半固态系统作为油炸介质的各种特性、比较评估油凝胶和传统油炸食品的吸油情况,最后以具体实例说明液态油脂凝胶作为油炸介质的功效。
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引用次数: 0
Morphological, physicochemical, and pasting properties of pre-gelatinized starch prepared by high-pressure homogenizer: A comparative study on starches from different resources 高压均质机制备的预糊化淀粉的形态、理化和糊化特性不同资源淀粉的比较研究
IF 7 1区 农林科学 Q1 FOOD SCIENCE & TECHNOLOGY Pub Date : 2024-11-04 DOI: 10.1016/j.foodres.2024.115294
Xuanyi Zhang , Xiaojun Lin , Baojun Xu
Pre-gelatinized starch, a physically modified starch known for its ability to swell in cold water, has wide applications across various industries. This study assesses the feasibility of high-pressure homogenization (HPH) in producing pre-gelatinized starches and compares their morphological, physicochemical, and pasting properties from different sources. Starches from eleven sources, including mung bean, pea, wheat, sweet potato, cassava, corn, non-waxy rice, waxy rice, chickpea, lentil, and chestnut, were processed using HPH at 150 MPa for three cycles. The resulting pre-gelatinized starch granules exhibited disrupted surface structures, increased water absorption and solubility, decreased crystallinity, and altered gelatinization temperatures. Results showed that waxy rice pre-gelatinized starch had the highest degree of pre-gelatinization (90.27%) and water absorption index (61.95%), while chestnut pre-gelatinized starch had the highest water solubility index (21.58%) and lentil pre-gelatinized starch demonstrated the highest gel strength (2178.00 g). X-ray diffraction analysis revealed a significant reduction in crystallinity, with values ranging from 13.96% to 18.29%. Additionally, the study observed variations in pasting properties, with cassava pre-gelatinized starch exhibiting the highest peak viscosity (5458 cP), trough viscosity (3864 cP), and final viscosity (6536 cP). These findings indicate that HPH is an effective method for producing pre-gelatinized starch with enhanced functional properties, enriching the scientific understanding of pre-gelatinized starches from different sources and promoting their application in the food industry and other sectors.
预糊化淀粉是一种物理改性淀粉,以其在冷水中的膨胀能力而闻名,在各行各业都有广泛的应用。本研究评估了高压均质(HPH)生产预糊化淀粉的可行性,并比较了不同来源的预糊化淀粉的形态、理化和糊化特性。来自绿豆、豌豆、小麦、红薯、木薯、玉米、非蜡质大米、蜡质大米、鹰嘴豆、扁豆和栗子等 11 种来源的淀粉在 150 兆帕的压力下使用 HPH 进行了三个循环的处理。所得预糊化淀粉颗粒的表面结构被破坏,吸水性和溶解性增加,结晶度降低,糊化温度改变。结果表明,蜡质大米预糊化淀粉的预糊化度(90.27%)和吸水指数(61.95%)最高,而栗子预糊化淀粉的水溶性指数(21.58%)最高,扁豆预糊化淀粉的凝胶强度(2178.00 克)最高。X 射线衍射分析表明,结晶度明显降低,数值从 13.96% 到 18.29%不等。此外,研究还观察到糊化特性的变化,木薯预糊化淀粉表现出最高的峰值粘度(5458 cP)、谷值粘度(3864 cP)和最终粘度(6536 cP)。这些研究结果表明,HPH 是生产功能特性更强的预糊化淀粉的有效方法,它丰富了人们对不同来源预糊化淀粉的科学认识,促进了它们在食品工业和其他领域的应用。
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引用次数: 0
Activation of microbial community and enhancement of quality by inoculating Zygosaccharomyces rouxii during the post-fermentation stage of Doubanjiang 在豆瓣酱后发酵阶段接种胭脂虫酵母菌激活微生物群落并提高质量
IF 7 1区 农林科学 Q1 FOOD SCIENCE & TECHNOLOGY Pub Date : 2024-11-04 DOI: 10.1016/j.foodres.2024.115311
Danyu Yan , Qi Qi , Linpei Liu , Lei Feng , Peiyi Deng , Zhuo Chen , Yingchun Mu , Wei Su
The prolonged post-fermentation stage of Doubanjiang imparts unique flavors but may reduce microbial vitality and increase contamination, affecting quality. This study investigated the effect of Zygosaccharomyces rouxii inoculation during post-fermentation. Results showed a 46.7% increase in amino nitrogen and a significant rise in volatile compounds like phenethyl alcohol, 3-methyl-1-butanol, and ethyl octanoate. The relative abundances of Staphylococcus and Pantoea increased among bacteria, while Pichia, Wickerhamiella, and Zygosaccharomyces increased among fungi. Redundancy analysis showed a positive correlation between these genera and the main volatiles. Microbial ecological network analysis showed that inoculating Z. rouxii increased nodes and edges, resulting in tighter inter-module connections and enhanced robustness. Key genera included Zygosaccharomyces, Staphylococcus, Kazachstania, and Weissella. Metaproteomic results demonstrated that upregulated proteins were predominantly enriched in pathways related to flavor formation, while downregulated proteins were associated with ribosome and DNA synthesis-related pathways. PICRUSt2 analysis results showed higher expression of enzymes related to volatiles in innoculated samples. Inoculating Z. rouxii during the post-fermentation could boost core microorganisms, curb foodborne pathogens, stabilize the microbial community, and enhance Doubanjiang quality.
豆瓣酱的后发酵阶段时间较长,会带来独特的风味,但可能会降低微生物的活力,增加污染,影响质量。本研究调查了在后发酵期间接种胭脂虫酵母菌的效果。结果显示,氨基氮增加了 46.7%,苯乙醇、3-甲基-1-丁醇和辛酸乙酯等挥发性化合物显著增加。细菌中葡萄球菌和泛酸菌的相对丰度增加,而真菌中皮奇菌、威克哈米氏菌和酵母菌的相对丰度增加。冗余分析表明,这些菌属与主要挥发物之间存在正相关。微生物生态网络分析显示,接种胭脂虫增加了节点和边,从而使模块间的连接更加紧密,增强了稳健性。主要菌属包括酿酒酵母菌属、葡萄球菌属、卡扎斯塔尼亚菌属和魏氏菌属。元蛋白组学结果表明,上调的蛋白质主要富集在与味道形成相关的途径中,而下调的蛋白质则与核糖体和 DNA 合成相关的途径有关。PICRUSt2 分析结果显示,在接种过的样品中,与挥发性物质有关的酶的表达量较高。在后发酵过程中接种胭脂虫可提高核心微生物的数量,抑制食源性致病菌,稳定微生物群落,提高豆瓣酱的品质。
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引用次数: 0
Niche-specific evolution and gene exchange of Salmonella in retail pork and chicken 零售猪肉和鸡肉中沙门氏菌的特异性进化和基因交换
IF 7 1区 农林科学 Q1 FOOD SCIENCE & TECHNOLOGY Pub Date : 2024-11-03 DOI: 10.1016/j.foodres.2024.115299
Huanjing Sheng , Linna Zhao , Jia Suo , Qiuping Yang , Chenyang Cao , Jia Chen , Guangqing Cui , Yiling Fan , Yi Ma , Shengnan Huo , Xin Wu , Tao Yang , Xuewen Cui , Sheng Chen , Shenghui Cui , Baowei Yang
Salmonella exhibits extensive genetic diversity, facilitated by horizontal gene transfer occurring within and between species, playing a pivotal role in this diversification. Nevertheless, most studies focus on clinical and farm animal isolates, and research on the pangenome dynamics of Salmonella isolates from retail stage of the animal food supply chain is limited. Here, we investigated the genomes of 950 Salmonella isolates recovered from retail chicken and pork meats in seven provinces and one municipality of China in 2018. We observed a strong correlation between Salmonella sublineage diversity and the accessory genome with meat type, revealing reduced diversity associated with increased resistance. Importantly, genes associated with antibiotic, biocide, and heavy metal resistance were unevenly distributed in Salmonella from retail chicken and pork. Pork Salmonella isolates showed a higher prevalence of copper and silver resistance genes, while chicken Salmonella isolates displayed a significant predominance of genetic determinants associated with cephalosporin and ciprofloxacin resistance. Moreover, co-occurrence patterns of resistance determinants and their interaction with mobile genetic elements also correlated with meat type. In summary, our findings shed light on how Salmonella achieves their ecological niche success driven by evolution and gene changes in the retail stage of the animal food supply chain.
沙门氏菌具有广泛的遗传多样性,物种内部和物种之间发生的水平基因转移促进了这种多样性,并在其中发挥了关键作用。然而,大多数研究都集中在临床和农场动物分离物上,而对动物食品供应链零售阶段沙门氏菌分离物的泛基因组动态研究却很有限。在此,我们研究了 2018 年从中国七省一市零售鸡肉和猪肉中回收的 950 株沙门氏菌分离物的基因组。我们观察到沙门氏菌亚系多样性和附属基因组与肉类类型之间存在很强的相关性,揭示了与耐药性增加相关的多样性降低。重要的是,与抗生素、杀菌剂和重金属耐药性相关的基因在零售鸡肉和猪肉的沙门氏菌中分布不均。猪肉沙门氏菌分离物中铜和银抗性基因的流行率较高,而鸡肉沙门氏菌分离物中与头孢菌素和环丙沙星抗性相关的基因决定簇则明显占优势。此外,抗性基因的共存模式及其与移动遗传因子的相互作用也与肉类类型有关。总之,我们的研究结果揭示了沙门氏菌是如何在动物食品供应链零售阶段通过进化和基因变化实现其生态位成功的。
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引用次数: 0
Isolation of ice structuring proteins from winter wheat in frigid region (Dongnongdongmai1) and the effect on freeze–thaw stability of dough 从寒带冬小麦(冬农冬麦1)中分离冰结构蛋白及其对面团冻融稳定性的影响
IF 7 1区 农林科学 Q1 FOOD SCIENCE & TECHNOLOGY Pub Date : 2024-11-03 DOI: 10.1016/j.foodres.2024.115295
Xue Wang , Haoyuan Geng , Dandan Wu , Liqi Wang , Na Zhang , Weining Wang , Dianyu Yu
In this study, ice structuring proteins (WISPs) extracted from winter wheat in a frigid region were prepared and added to frozen-thawed dough. The WISPs were characterized, revealing that they contained a higher proportion of hydrophilic amino acids and had a molecular weight of approximately 15 kDa. The highest thermal hysteresis activity (THA) observed was 0.62 °C. The secondary structure of WISPs was determined to be as follows: β-sheet: 49.33 %, random coil: 13.87 %, α-helix: 16.35 %, β-turn: 20.45 %. The study investigated the effects of different additions of WISPs on the water mobility, glass transition temperature, microstructure, rheological properties, and texture analysis of frozen-thawed dough. The results demonstrated that the inclusion of WISPs reduced the fluidity of water and water migration in the dough during the frozen-thawed cycle. This protective effect preserved the internal structure and gluten network of the dough, leading to increased viscosity, elasticity, and improved texture properties of the frozen-thawed dough. Furthermore, the addition of WISPs at concentrations ranging from 0 % to 0.7 % resulted in a 1.8 °C increase in the glass transition temperature (Tg). Overall, these findings suggest that WISPs can serve as a beneficial additive for enhancing the freeze–thaw stability of dough.
本研究制备了从寒冷地区冬小麦中提取的冰结构蛋白(WISPs),并将其添加到冷冻解冻的面团中。对 WISPs 进行了表征,发现它们含有较高比例的亲水性氨基酸,分子量约为 15 kDa。观察到的最高热滞后活性(THA)为 0.62 °C。经测定,WISPs 的二级结构如下:β-片状结构:49.33 %,随机线圈13.87 %,α-螺旋:16.35 %,β-匝:20.45 %。该研究探讨了不同 WISPs 添加量对冻融面团的水迁移率、玻璃化转变温度、微观结构、流变特性和质构分析的影响。结果表明,在冷冻-解冻周期中,WISPs 的加入降低了面团中水的流动性和水的迁移。这种保护作用保留了面团的内部结构和面筋网络,从而提高了冻融面团的粘度和弹性,并改善了其质地特性。此外,添加浓度为 0 % 至 0.7 % 的 WISPs 可使玻璃化转变温度(Tg)提高 1.8 °C。总之,这些研究结果表明,WISPs 可以作为一种有益的添加剂来提高面团的冻融稳定性。
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引用次数: 0
Evaluation of the bactericidal activity of plasma-activated NaCl solution (PAN) against foodborne pathogens: Inactivation mechanism and application to mackerel 评估血浆活化氯化钠溶液(PAN)对食源性病原体的杀菌活性:灭活机理及在鲭鱼中的应用
IF 7 1区 农林科学 Q1 FOOD SCIENCE & TECHNOLOGY Pub Date : 2024-11-03 DOI: 10.1016/j.foodres.2024.115283
Sunna Jyung , Soo-Hwan Kim , Dong-Hyun Kang
The objective of this study was to assess the bactericidal effect of plasma-activated NaCl solution (PAN) against Escherichia coli O157:H7, Salmonella Typhimurium, and Listeria monocytogenes and apply PAN as a brine salting solution for mackerel. To enhance the bactericidal effect of plasma-activated water (PAW), NaCl solutions (0, 3.5, 7, and 10%) were treated with plasma for 20 and 40 min to generate PAN. Plasma-activated glycerol solution (PAG) was also included to evaluate the influence of water activity on plasma activation and its effect on microbial activity. Physicochemical analysis revealed that elevating the NaCl concentration of PAN led to a decrease in pH, an increase in oxidation–reduction potential, and higher levels of reactive species such as H2O2 and HOCl. PAN showed greater antibacterial activity compared to PAW and PAG, except for L. monocytogenes, where 40 min activation time and treatment time exceeding 20 min was required for significantly higher reduction to occur. PAN exhibited greater antibacterial activity at higher NaCl concentrations, which was attributed to increased ionic strength and reactive chlorine species. Additionally, we evaluated the microbial mechanisms of PAN by assessing cellular damage and alterations. The common observation across the three pathogens was that PAN resulted in increased cell membrane damage, reduced intermembrane enzyme activity, higher intracellular ROS levels, and changes in zeta potential values, while DNA damage was observed only in PAN-treated L. monocytogenes. Furthermore, when PAW and PAN were stored for up to four weeks, PAN showed higher efficacy compared to PAW. 10% PAN was also effective against foodborne pathogens on mackerel, achieving log reductions of 3.62 for E. coli O157:H7, 4.62 for S. Typhimurium, and 3.18 for L. monocytogenes after a 20 min treatment without adversely affecting quality. Our results demonstrated the antibacterial activity and action mechanism of PAN, presenting its potential application in the seafood industry.
本研究旨在评估血浆活化氯化钠溶液(PAN)对大肠杆菌 O157:H7、鼠伤寒沙门氏菌和李斯特菌的杀菌效果,并将 PAN 用作鲭鱼的盐水腌制溶液。为了增强血浆活化水(PAW)的杀菌效果,用血浆处理 NaCl 溶液(0、3.5、7 和 10%)20 和 40 分钟,生成 PAN。还加入了等离子活化甘油溶液(PAG),以评估水活性对等离子活化的影响及其对微生物活性的影响。理化分析表明,提高 PAN 的氯化钠浓度会导致 pH 值下降、氧化还原电位升高以及 H2O2 和 HOCl 等活性物质水平升高。与 PAW 和 PAG 相比,PAN 表现出更强的抗菌活性,但对单核细胞增多性酵母菌而言,需要 40 分钟的活化时间和超过 20 分钟的处理时间才能显著提高还原率。当 NaCl 浓度较高时,PAN 表现出更强的抗菌活性,这归因于离子强度和活性氯物种的增加。此外,我们还通过评估细胞损伤和改变来评估 PAN 的微生物机制。对三种病原体的共同观察结果是,PAN 会导致细胞膜损伤加剧、膜间酶活性降低、细胞内 ROS 水平升高以及 zeta 电位值变化,而 DNA 损伤仅在 PAN 处理的单核细胞增多性乳酸杆菌中观察到。此外,当 PAW 和 PAN 储存长达四周时,PAN 的功效高于 PAW。10% 的 PAN 对鲭鱼上的食源性病原体也有效,经过 20 分钟的处理后,大肠杆菌 O157:H7 的对数值降低了 3.62,伤寒杆菌的对数值降低了 4.62,单核细胞增生性酵母菌的对数值降低了 3.18,而且不会对质量产生不利影响。我们的研究结果表明了 PAN 的抗菌活性和作用机理,并展示了其在海产品行业中的应用潜力。
{"title":"Evaluation of the bactericidal activity of plasma-activated NaCl solution (PAN) against foodborne pathogens: Inactivation mechanism and application to mackerel","authors":"Sunna Jyung ,&nbsp;Soo-Hwan Kim ,&nbsp;Dong-Hyun Kang","doi":"10.1016/j.foodres.2024.115283","DOIUrl":"10.1016/j.foodres.2024.115283","url":null,"abstract":"<div><div>The objective of this study was to assess the bactericidal effect of plasma-activated NaCl solution (PAN) against <em>Escherichia coli</em> O157:H7, <em>Salmonella</em> Typhimurium, and <em>Listeria monocytogenes</em> and apply PAN as a brine salting solution for mackerel. To enhance the bactericidal effect of plasma-activated water (PAW), NaCl solutions (0, 3.5, 7, and 10%) were treated with plasma for 20 and 40 min to generate PAN. Plasma-activated glycerol solution (PAG) was also included to evaluate the influence of water activity on plasma activation and its effect on microbial activity. Physicochemical analysis revealed that elevating the NaCl concentration of PAN led to a decrease in pH, an increase in oxidation–reduction potential, and higher levels of reactive species such as H<sub>2</sub>O<sub>2</sub> and HOCl. PAN showed greater antibacterial activity compared to PAW and PAG, except for <em>L. monocytogenes</em>, where 40 min activation time and treatment time exceeding 20 min was required for significantly higher reduction to occur. PAN exhibited greater antibacterial activity at higher NaCl concentrations, which was attributed to increased ionic strength and reactive chlorine species. Additionally, we evaluated the microbial mechanisms of PAN by assessing cellular damage and alterations. The common observation across the three pathogens was that PAN resulted in increased cell membrane damage, reduced intermembrane enzyme activity, higher intracellular ROS levels, and changes in zeta potential values, while DNA damage was observed only in PAN-treated <em>L. monocytogenes</em>. Furthermore, when PAW and PAN were stored for up to four weeks, PAN showed higher efficacy compared to PAW. 10% PAN was also effective against foodborne pathogens on mackerel, achieving log reductions of 3.62 for <em>E. coli</em> O157:H7, 4.62 for <em>S</em>. Typhimurium, and 3.18 for <em>L. monocytogenes</em> after a 20 min treatment without adversely affecting quality. Our results demonstrated the antibacterial activity and action mechanism of PAN, presenting its potential application in the seafood industry.</div></div>","PeriodicalId":323,"journal":{"name":"Food Research International","volume":"198 ","pages":"Article 115283"},"PeriodicalIF":7.0,"publicationDate":"2024-11-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142662607","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
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Food Research International
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