Are Chinese Edible Oils Safe A Survey of Trans Fatty Acid.

第42卷第2期2021年3月Vol42No2Mar2021质谱学报JournalofChinese MassSpectrometrySociety稳定同位素比技术用于橄榄油的掺假鉴定马玉华】，唐方东2,刘佳煜2,忻智炜2,曾友石r杜林1，刘卫1 !1.中国科学院上海应用物理研究所，上海201800'.上海市计量测试技术研究院，上海201203）摘要：市场上橄榄油掺假现象屡禁不止，传统鉴定方法存在局限性％本研究利用元素分析仪-稳定同位素比质谱仪（elemental analyzer-isotope ratio mass spectrometer,EA-IRMS）对市场上常见的7种植物油进行氢、碳稳定同位素比值检验，并对测量结果进行显著性差异分析，同时分析橄榄油中氢、碳稳定同位素比值的相关性。

结果表明：橄榄油中&D范围为一146.78%。

——125.30%D,13C范围为一29.72%。

——28.59%。

，与其他品类植物油中氢稳定同位素比值差异显著（P V0.05）,与除葵花籽油、野山茶油外的植物油中碳稳定同位素比值差异显著（P V0.05）;且橄榄油中氢、碳稳定同位素比值具有较强的相关性（Peasods r=0.904）计算模拟豆油、玉米油对橄榄油掺假的情况，结果表明，氢、碳稳定同位素比结合分析最低能检测出玉米油掺假10%、豆油掺假30%以上的情况％该研究可为橄榄油的掺假鉴定提供方法参考％关键词：稳定同位素比质谱仪（isotope ratio mass spectrometer,IRMS）；橄榄油；掺假鉴定中图分类号:O657.63文献标志码:A文章编号：10042997（2021）02018908doi：10.7538/zpxb.2020.0042开放科学（资源服务）标识码（OSID）:Olive Oil Adulteration IdentificationUsing Stable Isotope Ratio TechniqueMA Yu-hua1,TANG Fang-dong2,LIU Jia-y u z,XIN Zhi-wei2,ZENG You-shi1,DU Lin1,LIU Wei1(1.Shanghai Institute of Applied Physics,Chinese Academy of Sciences,Shanghai201800,China；2.Shanghai Institute of Bleasurement and Testing Technology,Shanghai201203,China)Abstract:Olive oil adulteration issue on the market emerges in an endless stream.Sta-bleisotoperatiotechniquecanbee f ectivelyusedfortheadulterationidentificationof oliveoil Inthisresearch"isotoperatiodi f erencesbetweenoliveoilandothervegetable edible oils were investigated Sevencommonvegetableedibleoils wereco l ectedfrom markets Stablehydrogenandcarbonisotoperatiosofselectededibleoilsweremeasured byelementalanalyzer-isotoperatio massspectrometer(EA-IRMS)The correlation betweenthehydrogenandcarbonstableisotoperatiosinoliveoilwasalsoanalyzed收稿日期20200413修回日期：2020-05-27基金项目：加速器质谱测量树木年轮中氚的样品制备及应用研究（11705265）基于同位素技术研究氚化氢在土壤中的转化机理（1906164）上海市质量技术监督局科技计划项目（01701）资助作者简介：马玉华（1991—），女（汉族），山东人，助理研究员，从事核技术及应用％E-mail：mayuhua@通信作者：杜林（1987—），男（汉族），山东人，助理研究员，从事核技术及应用％E-mail：***************.cn 刘卫（1966—），男（汉族），湖南人，研究员，从事核技术及应用。

百合花的满分作文320个字英文回答：Lilies are one of my favorite flowers. They are not only beautiful but also have a wonderful fragrance. Whenever I see a bouquet of lilies, it brings a smile to my face. The elegant petals and vibrant colors make them a popular choice for many occasions.Lilies are known for their symbolism. In Chinese culture, they represent purity and innocence. They are often used in weddings and other celebrations to bring good luck and blessings to the couple or the event. In Western culture, lilies symbolize love and devotion. They are often given as gifts on anniversaries or to express sympathy.Besides their symbolic meanings, lilies also have practical uses. Some species of lilies produce edible bulbs that can be used in cooking. These bulbs are rich in starch and can be boiled, roasted, or added to soups and stews. Inaddition, lilies are used in the perfume industry. The essential oils extracted from their petals are used to create fragrances that are loved by many.One of the reasons why I love lilies is their variety. There are more than 100 species of lilies, each with its own unique characteristics. From the popular Easter lilies to the exotic tiger lilies, there is a lily for every taste and preference. Some lilies have large, showy flowers while others have smaller, delicate blooms. Some lilies have a strong fragrance while others are more subtle. This diversity adds to their charm and appeal.Another reason why lilies are special to me is their association with special memories. I remember receiving a bouquet of lilies on my graduation day. The sweet scent filled the room and reminded me of all the hard work and dedication that went into achieving my goals. I also recall visiting a lily garden with my family during a vacation. The sight of hundreds of lilies in full bloom was breathtaking and created a lasting impression.In conclusion, lilies are not just ordinary flowers. They are a symbol of beauty, purity, and love. Their versatility and variety make them a popular choice for various occasions. Whether it is a wedding, anniversary, or a simple gift, lilies never fail to bring joy and happiness. So, the next time you see a bouquet of lilies, take a moment to appreciate their beauty and the emotions they evoke.中文回答：百合花是我最喜欢的花之一。

花生油的执行标准（Peanut oil standards）GB 1534-2003PrefaceTable of this standard 5.2, table 2, part indicators of Table 3, chapters 5.4 and seventh, and eighth are mandatory, while others are recommended.This standard is for GB1534-1986 "peanut oil", GB/T8615-19888, "sweet peanut oil" revision and merger.This standard is with GB1534-1986, GB/T 8615-19888 major technical differences:- the structure, technical elements and presentation rules of this standard shall be based on GB/T 1.1-200(00(guidelines for Standardization: first part: StandardStructure and writing rules;According to the processing method of peanut oil, classification and determination are carried out;- to adjust the standards and quality indicators in the above standards;- revised the relevant index value in the quality index.This standard has been revised in accordance with the international Codex Alimentarius Commission standards.This standard since the date of implementation, instead of GB1534-1986 "peanut oil", GB/T8615-1988 ((aromatic peanut oil).This standard is put forward by National Grain Bureau and put in order.This standard is responsible for drafting units: National Grain Bureau standard quality center, State Food Bureau, Xi'an food and feed quality supervision and inspectionTest center; in the drafting unit: Shandong Laiyang Luhua peanut oil Co. Ltd., Qingdao Kerry Vegetable Oil Co. Ltd. and Shanghai Fulinmen Food Co.Ltd, Shenzhen Nanshun Oil Co. ltd..The main drafters of this standard are Tang Ruiming, dragon, Xue Yalin, Chen Yan, Sun Dongwei, Pang Dongmei, Xu Xia, Xia Hongwen.All previous editions of the standard replaced by this standard are: GB1534-1986, GB/T8615-1988,GB 1534-2003Peanut oilRangeThis standard specifies the terms and definitions, classification, quality requirements, testing methods and rules, specifications, labels, packaging, storage and transportation of peanut oilRequirement。

博物馆禁止做的事情英语作文Museums are cultural institutions that serve to preserve and showcase the rich heritage and history of a society. They are repositories of invaluable artifacts, artworks, and historical relics that hold immense significance for both scholars and the general public. However, to maintain the integrity and safety of these precious collections, museums have established a set of rules and regulations that visitors must adhere to. These rules are in place to ensure the preservation of the exhibits and to provide a respectful and enjoyable experience for all who visit.One of the most fundamental rules in museums is the prohibition of touching the exhibits. Many of the artifacts and artworks on display are delicate, fragile, and irreplaceable. Even the slightest touch can cause irreparable damage to these treasures. The oils and acids from human skin can corrode and discolor the surfaces of paintings, sculptures, and other objects. Moreover, the transfer of dirt and grime can accelerate the deterioration of these items. To protect the collections, museums strictly enforce a "look, but don't touch" policy, and visitors are expected to admire the exhibits from a safe distance.Closely related to the prohibition on touching is the ban on food and drinks within the museum premises. Spills, crumbs, and stains can have devastating consequences for the exhibits. The presence of food and beverages also attracts pests, which can further compromise the condition of the collections. Museums go to great lengths to maintain a clean and controlled environment, and the introduction of edible items can jeopardize their efforts. Visitors are typically required to leave their food and drinks outside the museum or in designated areas before entering the exhibition spaces.Another common restriction in museums is the prohibition of photography, particularly in certain galleries or with specific exhibits. While many museums do allow photography, they may impose limitations to protect the artworks from the damaging effects of flash photography. The bright light of camera flashes can fade and discolor delicate materials, such as textiles, manuscripts, and photographic prints. Additionally, the use of tripods and other photography equipment can be disruptive to the flow of visitors and may obstruct the viewing experience for others. Some museums also restrict photography to prevent the unauthorized reproduction and distribution of copyrighted works.Closely related to the photography ban is the prohibition on sketching or drawing within the museum. While some institutionsmay allow sketching in designated areas, many have banned the practice altogether. The act of sketching can be disruptive to other visitors, and the materials used, such as pencils or charcoal, can potentially damage the exhibits if not properly contained. Moreover, the creation of unauthorized reproductions is a concern, as it may infringe on the intellectual property rights of the artists or the museum itself.Museums also typically prohibit the use of selfie sticks or any other extended photography equipment. These devices can be cumbersome and can interfere with the flow of foot traffic, potentially causing safety hazards. Furthermore, the use of selfie sticks can obstruct the view of other visitors, detracting from their overall museum experience.In addition to these general restrictions, museums may also have specific rules regarding the conduct of visitors. Loud talking, running, or engaging in disruptive behavior is often prohibited, as it can disturb the peaceful and contemplative atmosphere that museums strive to maintain. Visitors are expected to be respectful of the exhibits and the other patrons, and to follow the instructions of the museum staff.Moreover, museums may have restrictions on the types of bags, backpacks, or personal belongings that visitors can bring into theexhibition spaces. Large or bulky items can pose a safety hazard and may interfere with the flow of foot traffic. Some museums may require visitors to check their belongings at the entrance or to use transparent bags to ensure the security of the collections.Finally, museums may have specific rules regarding the accessibility of certain exhibits or galleries. For example, some areas may be restricted to adults or to guided tours only, either for security reasons or to preserve the integrity of the collections. Visitors are expected to respect these restrictions and to follow the instructions of the museum staff.In conclusion, the rules and regulations in museums are in place to protect the invaluable collections and to ensure a safe and enjoyable experience for all visitors. While these restrictions may seem inconvenient at times, they are necessary to maintain the integrity and preservation of the cultural heritage entrusted to these institutions. By respecting and adhering to these rules, visitors can contribute to the ongoing stewardship of these precious artifacts and artworks, allowing them to be enjoyed by generations to come.。