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| 1 | Tea aroma formation显示文摘Besides water,tea is one of the most popular beverages around the world.The chemical ingredients and biological activities of tea have been summarized recently.The current review summarizes tea aroma compounds and their formation in green,black,and oolong tea.The flavor of tea can be divided into two categories:taste(non-volatile compounds)and aroma(volatile compounds).All of these aroma molecules are generated from carotenoids,lipids,glycosides,etc.precursors,and also from Maillard reaction.In the current review,we focus on the formation mechanism of main aromas during the tea manufacturing process.©2015 Beijing Academy of Food Sciences.Production and hosting by Elsevier B.V.All rights reserved. | Chi-Tang Ho Xin Zheng Shiming Li | 2015 | Food Science and Human Wellness2015，4，1： | 62 |
| 2 | SlMYB75,an MYB-type transcription factor,promotes anthocyanin accumulation and enhances volatile aroma production in tomato fruits显示文摘Genetic manipulation of genes to upregulate specific branches of metabolic pathways is a method that is commonly used to improve fruit quality.However,the use of a single gene to impact several metabolic pathways is difficult.Here,we show that overexpression of the single gene SlMYB75(SlMYB75-OE)is effective at improving multiple fruit quality traits.In these engineered fruits,the anthocyanin content reached 1.86mg g−1 fresh weight at the red-ripe stage,and these SlMYB75-OE tomatoes displayed a series of physiological changes,including delayed ripening and increased ethylene production.In addition to anthocyanin,the total contents of phenolics,flavonoids and soluble solids in SlMYB75-OE fruits were enhanced by 2.6,4,and 1.2 times,respectively,compared to those of wild-type(WT)fruits.Interestingly,a number of aroma volatiles,such as aldehyde,phenylpropanoid-derived and terpene volatiles,were significantly increased in SlMYB75-OE fruits,with some terpene volatiles showing more than 10 times higher levels than those in WT fruits.Consistent with the metabolic assessment,transcriptomic profiling indicated that the genes involved in the ethylene signaling,phenylpropanoid and isoprenoid pathways were greatly upregulated in SlMYB75-OE fruits.Yeast one-hybrid and transactivation assays revealed that SlMYB75 is able to directly bind to the MYBPLANT and MYBPZM cis-regulatory elements and to activate the promoters of the LOXC,AADC2 and TPS genes.The identification of SlMYB75 as a key regulator of fruit quality attributes through the transcriptional regulation of downstream genes involved in several metabolic pathways opens new avenues towards engineering fruits with a higher sensory and nutritional quality. | Wei Jian Haohao Cao Shu Yuan Yudong Liu Juanfang Lu Wang Lu Ning Li Jianhui Wang Jian Zou Ning Tang Chan Xu Yulin Cheng Yanqiang Gao Wanpeng Xi Mondher Bouzayen Zhengguo Li | 2019 | Horticulture Research2019，6，1： | 39 |
| 3 | Analyzing the Flavor Compounds in Chinese Traditional Fermented Shrimp Pastes by HS-SPME-GC/MS and Electronic Nose显示文摘Shrimp paste is a type of condiments with high nutritional value.However,the flavors of shrimp paste,particularly the non-uniformity flavors,have limited its application in food processing.In order to identify the characteristic flavor compounds in Chinese traditional shrimp pastes,five kinds of typical commercial products were evaluated in this study.The differences in the volatile composition of the five products were investigated.Solid phase micro-extraction method was employed to extract the volatile compounds.GC-MS and electronic nose were applied to identify the compounds,and the data were analyzed using principal component analysis(PCA).A total of 62 volatile compounds were identified,including 8 alcohols,7 aldehydes,3 ketones,7 ethers,7 acids,3 esters,6 hydrocarbons,12 pyrazines,2 phenols,and 7 other compounds.The typical volatile compounds contributing to the flavor of shrimp paste were found as follows:dimethyl disulfide,dimethyl tetrasulfide,dimethyl trisulfide,2,3,5-trimethyl-6-ethyl pyrazine,ethyl-2,5-dimethyl-pyrazine,phenol and indole.Propanoic acid,butanoic acid,furans,and 2-hydroxy-3-pentanone caused unpleasant odors,such as pungent and rancid odors.Principal component analysis showed that the content of volatile compounds varied depending on the processing conditions and shrimp species.These results indicated that the combinations of multiple analysis and identification methods could make up the limitations of a single method,enhance the accuracy of identification,and provide useful information for sensory research and product development. | FAN Yan YIN Li-ang XUE Yong LI Zhaojie HOU Hu XUE Changhu | 2017 | Journal of Ocean University of China2017，16，2： | 25 |
| 4 | 超声波预处理对餐厨垃圾产VFAs的影响显示文摘采用超声波预处理餐厨垃圾以提高产挥发性脂肪酸(VFAs)产率.结果表明,在超声强度720W/L下处理15min后,餐厨垃圾SCOD含量比原样中SCOD提高了1倍,其中有机质中碳水化合物溶出量最大,由原样中8.2g/L提高到处理后的43.5g/L;在pH=6、温度35℃条件下,对含固率约为12%的餐厨垃圾进行厌氧发酵,未预处理和超声处理后的餐厨垃圾产生的VFAs最大值分别达到33.4,42.5g/L,经超声预处理的餐厨垃圾产VFAs的量提高了27.2%. | 王佳明 蒋建国 宫常修 张玉静 李梦露 | 2014 | 中国环境科学2014，34，5： | 18 |
| 5 | GC-MS, GC-O and OAV analyses of key aroma compounds in Jiaozi Steamed Bread显示文摘Jiaozi Steamed Bread(JSB)has a unique aroma as a traditional staple food in China.The volatile compounds in JSBwere extracted by simultaneous distillation and extraction(SDE)and headspace solid-phasemicroextraction(HS-SPME).These volatile substances were analyzed by gas chromatography-mass spectrometry(GC-MS)and gas chromatographyolfactometry-mass spectrometry(GC-O-MS).The results demonstrated that 61 volatile compounds were identified totally in samples,of which 15 were confirmed as potent aroma compounds with odor active values(OAVs)>1.The 15 potent aroma compounds were ethanol,1-butanol,1-pentanol,1-hexanol,heptanol,1-octen-3-ol,3-methyl-1-butanol,hexanal,heptanal,nonanal,(E)-2-heptenal,benzaldehyde,(E,E)-2,4-decadienal,2-pentylfuran and naphthalene.The SDEmethod had better linearity with coefficients of determination(R2)equal to or higher than 0.9991.Furthermore,the SDE method also achieved lower sensitivity and better repeatability and recovery than HS-SPME.This work provides reference method and parameters for future research on the flavor of JSB for commercial products. | Yuanhui Wang Jingwen Zhao Fei Xu Xiaoyun Wu Wenxuan Hu Yongfeng Chang Lanlan Zhang Jie Chen Changhong Liu | 2020 | Grain & Oil Science and Technology2020，3，1： | 17 |
| 6 | 挥发性盐基氮检测方法的现状及研究方向显示文摘挥发性盐基氮(TVB-N)含量是评价肉品新鲜度的重要指标,简述挥发性盐基氮测定的意义、主要方法及其原理。介绍挥发性盐基氮检测的发展和主要研究方向,基于近红外法的无损快速检测方法,并展望这一领域今后的主要研究内容和发展方向。 | 刘雪云 | 2014 | 农产品加工(下)2014，，1： | 15 |
| 7 | Effects of herbivore-induced rice volatiles on the host selection behavior of brown planthopper,Nilaparvata lugens显示文摘It has been suggested that herbivore would react to volatiles produced by herbivore infested plant due to potential change, either positive or negative, in the acceptability of the host plant. This hypothesis was tested for the brown planthopper (BPH) in the laboratory. Sixteen components of the headspace volatiles from rice seedlings with different treatments were collected with SPME and Tenax-TA trap and analyzed with GC and GC-MS. Significant differences in volatile emissions were observed for rice plants with different treatments. Undamaged control plants, mechanically damaged plants and the plants infested by BPH for 1 or 2 d emitted much lower amounts of volatiles compared to the plants infested by BPH for 3 or 5 d. The plants infested by BPH for 3 or 5 d emitted several volatiles that were not detected in undamaged control plants, mechanically damaged plants or the plants infested by BPH for 1 or 2 d. Spodoptera litura infested plants released much higher amounts of volatiles than those in all | XU Tao ZHOU Qiang XIA Qiang ZHANG Wenqing ZHANG Guren GU Dexiang | 2002 | Chinese Science Bulletin2002，47，16： | 13 |
| 8 | New strategies for colorectal cancer screening显示文摘Colorectal cancer (CRC) is still one of the leading causes of cancer-related death in Western countries, despite major improvements in its treatment. The dramatically high social and economic impact of CRC on human health makes the identification of a reliable screening tool of paramount importance. Current screening methods, such as the fecal occult blood test and colonoscopy do not adequately meet the ideal requisites of a screening test because, even if they are effective, they are limited first by too low specificity and sensitivity, or second by high invasiveness, costs and risk. Nowadays extended efforts are made by researchers to look for more reliable and effective screening tests based on a systems biology approach, using biological samples easily available, such as urine, breath, serum and feces. The effectiveness and reliability of several new attempts to screen these patients by non-invasive analysis of their biological samples using genomic (genetic and epigenetic alteration), transcriptomic (miRNA), proteomic (cancer-related antigens, new antibodies against tumor-associated antigens, mutated proteins) and metabolomic (volatile organic metabolites) methods are discussed in this review. Among the most interesting new screening tools, fecal fluorescent long-DNA, fecal miRNA and metabolomic evaluation in breath and/ or serum seem to be most promising. | Maria Di Lena Elisabetta Travaglio Donato F Altomare | 2013 | World Journal of Gastroenterology2013，19，12： | 12 |
| 9 | (E)-Nerolidol is a volatile signal that induces defenses against insects and pathogens in tea plants显示文摘Plants release large amounts of volatile organic compounds(VOCs)in response to attackers.Several VOCs can serve as volatile signals to elicit defense responses in undamaged tissues and neighboring plants,but many questions about the ecological functions of VOCs remain unanswered.Tea plants are impacted by two harmful invaders,the piercing herbivore Empoasca(Matsumurasca)onukii Matsuda and the pathogen Colletotrichum fructicola.To determine the VOC signals in tea,we confirmed CsOPR3 as a marker gene and set up a rapid screening method based on a 1.51 kb CsOPR3 promoter fused with aβ-glucuronidase(GUS)reporter construct(OPR3p::GUS)in Arabidopsis.Using this screening system,a terpenoid volatile(E)-nerolidol was identified as a potent signal that elicits plant defenses.The early responses triggered by(E)-nerolidol included the activation of a mitogen-activated protein kinase and WRKY,an H2O2 burst,and the induction of jasmonic acid and abscisic acid signaling.The induced plants accumulated high levels of defenserelated chemicals,which possessed broad-spectrum anti-herbivore or anti-pathogen properties,and ultimately triggered resistance against Empoasca onukii and Colletotrichum fructicola in tea.We propose that these findings can supply an environmentally friendly management strategy for controlling an insect pest and a disease of tea plants. | Shenglong Chen Liping Zhang Xiaoming Cai Xin Li Lei Bian Zongxiu Luo Zhaoqun Li Zongmao Chen Zhaojun Xin | 2020 | Horticulture Research2020，7，1： | 12 |
| 10 | Review on Volatile Flavor Components of Roasted Oilseeds and Their Products显示文摘Volatile flavor components in foods are the key quality parameters. The researchers conducted in-depth research on sesame oil, peanut oil, rapeseed oil, sunflower oil, sesame paste and peanut butter, etc. However, there is no comprehensive summary about the flavor of roasted oilseeds and their products. The occurrence and the formation mechanisms of the main volatile flavor substances,and the impacts of processing factors are discussed in this review, which may provide references for further research on volatile flavor compounds, identification and evaluation of specific products and development of new products. | LI Cuicui HOU Lixia | 2018 | Grain & Oil Science and Technology2018，1，4： | 12 |
| 11 | Volatile composition and classification of Lilium flower aroma types and identification,polymorphisms,and alternative splicing of their monoterpene synthase genes显示文摘Lily is a well-known ornamental plant with a diversity of fragrant types.Basic information on lily floral scent compounds has been obtained for only a few accessions,and little is known about Lilium aroma types,the terpene synthase genes that may play roles in the production of key volatiles,or the range of monoterpenes that these genes produce.In this study,41 cultivars were analyzed for volatile emissions,and a total of 46 individual volatile compounds were identified,16 for the first time in lilies.Lily accessions were classified into six groups according to the composition of major scent components:faint-scented,cool,fruity,musky,fruity-honey,and lily.Monoterpenes were one of the main groups of volatiles identified,and attention was focused on terpene synthase(TPS)genes,which encode enzymes that catalyze the last steps in monoterpene synthesis.Thirty-two candidate monoterpene synthase cDNAs were obtained from 66 lily cultivars,and 64 SNPs were identified.Two InDels were also shown to result from variable splicing,and sequence analysis suggested that different transcripts arose from the same gene.All identified nucleotide substitution sites were highly correlated with the amounts of myrcene emitted,and InDel site 230 was highly correlated with the emission of all major monoterpenoid components,especially(E)-β-ocimene.Heterologous expression of five cDNAs cloned from faint-scented and strong-scented lilies showed that their corresponding enzymes could convert geranyl diphosphate to(E)-β-ocimene,α-pinene,and limonene.The findings from this study provide a major resource for the assessment of lily scent volatiles and will be helpful in breeding of improved volatile components. | Fang Du Ting Wang Jun-miao Fan Zhi-zhi Liu Jia-xin Zong Wei-xin Fan Yuan-huai Han Donald Grierson | 2019 | Horticulture Research2019，6，1： | 12 |
| 12 | The levels, sources and reactivity of volatile organic compounds in a typical urban area of Northeast China显示文摘Air concentrations of volatile organic compounds(VOCs) were continually measured at a monitoring site in Shenyang from 20 August to 16 September 2017. The average concentrations of alkanes, alkenes, aromatics and carbonyls were 28.54, 6.30, 5.59 and9.78 ppbv, respectively. Seven sources were identified by the Positive Matrix Factorization model based on the measurement data of VOCs and CO. Vehicle exhaust contributed the most(36.15%) to the total propene-equivalent concentration of the measured VOCs,followed by combustion emission(16.92%), vegetation emission and secondary formation(14.33%), solvent usage(10.59%), petrochemical industry emission(9.89%), petrol evaporation(6.28%), and liquefied petroleum gas(LPG) usage(5.84%). Vehicle exhaust, solvent usage and combustion emission were found to be the top three VOC sources for O_3 formation potential, accounting for 34.52%, 16.55% and 11.94%, respectively. The diurnal variation of the total VOCs from each source could be well explained by their emission characteristics,e.g., the two peaks of VOC concentrations from LPG usage were in line with the cooking times for breakfast and lunch. Wind rose plots of the VOCs from each source could reveal the possible distribution of the sources around the monitoring site. The O_3 pollution episodes during the measurement period were found to be coincident with the elevation of VOCs, which was mainly due to the air parcel from the southeast direction where petrochemical industry emission was found to be dominant, suggesting that the petrochemical industry emission from the southeast was probably a significant cause of O_3 pollution in Shenyang. | Zhuobiao Ma Chengtang Liu Chenglong Zhang Pengfei Liu Can Ye Chaoyang Xue Di Zhao Jichen Sun Yiming Du Fahe Chai Yujing Mu | 2019 | Journal of Environmental Sciences2019，31，5： | 12 |
| 13 | Diet supplementation with an organic acids-based formulation affects gut microbiota and expression of gut barrier genes in broilers显示文摘This study was designed to study the effect of diet supplementation with an organic acids-based formulation(OABF) on luminal-and mucosa-associated bacteria, concentration of volatile fatty acids(VFA), microbial glycolytic enzyme activity and expression of mucin 2(MUC2), immunoglobulin A(IgA)and tight junction protein, i.e., zonula occludens-1(ZO1), zonula occludens-2(ZO2), claudin-1(CLDN1),claudin-5(CLDN5) and occludin(OCLN), genes at the ileal and cecal level. A 2 × 2 factorial design was used having OABF inclusion and avilamycin as main factors. Subsequently, 544 day-old male Cobb broilers were allocated in the following 4 treatments, each with 8 replicates: no additions(CON), 1 g OABF/kg diet(OA),2.5 mg avilamycin/kg diet(AV) and combination of OA and AV(OAAV). The trial lasted for 42 days. In the ileum, OAAV resulted in lower mucosa-associated total bacteria levels(PO × A= 0.028) compared with AV.In addition, ileal digesta levels of Clostridium perfringens subgroup were decreased by avilamycin(PA= 0.045). Inclusion of OABF stimulated the activity of microbial glycolytic enzymes, whereas avilamycin resulted in lower acetate(PA= 0.021) and higher butyrate(PA= 0.010) molar ratios. Expression of ZO1 and CLDN5 was down-regulated by both OABF(PO= 0.016 and PO= 0.003, respectively) and avilamycin(PA= 0.016 and PA= 0.001, respectively). In addition, CLDN1 was down-regulated in AV compared with CON(PO × A= 0.012). Furthermore, OABF down-regulated MUC2(PO= 0.027), whereas avilamycin down-regulated nuclear factor kappa B subunit 1(NFKB1)(PA= 0.024), toll-like receptor 2 family member B(TLR2B)(PA= 0.011) and toll-like receptor 4(TLR4)(PA= 0.014) expression. In the ceca, OABF inclusion increased digesta levels of Clostridium coccoides(PO= 0.018) and Clostridium leptum(PO= 0.040) subgroups, while it up-regulated MUC2 expression(PO= 0.014). Avilamycin(PA= 0.044) and interaction(PO × A< 0.001) effects for IgA expression were noted, with CON having higher IgA expression compared with AV. In conclusion, new findings regarding OABF inclusion effects on an array of relevant biomarkers for broiler gut ecology have been reported and discussed in parallel with avilamycin effects used as a positive control. This new knowledge is expected to provide a response baseline for follow up trials under various stress and challenge conditions. | Irida Palamidi Konstantinos C.Mountzouris | 2018 | Animal Nutrition2018，，4： | 11 |
| 14 | Mantle-derived magmatic gas releasing features at the Rehai area, Tengchong county, Yunnan Province, China显示文摘This paper deals with the chemical and isotopic compositions of escaped gases from the Rehai geothermal area in Tengchong county of Yunnan Province. Results indicate that there is the mantle-derived magmatic intrusion in shallow crust at this area. Modern mantle-derived mag-matic volatiles are being released currently in a steady stream by way of active faults. The escaped gases are mostly composed of CO2, together with subordinate amounts of H2S, N2, H2, CH4, SO2, CO and He. At the studied area, the north-south directed fault is the deepest, and it may be interlinked with the deep-seated thermal reservoir that would be directly recharged by the mantle-derived magmatic volatile. The He, C isotopic evidence reveals that the modern active magma beneath Rehai area may originate from the historical mantle-derived magma which caused the latest eruptive activity of volcanoes in that region. | 上官志冠 白春华 孙明良 | 2000 | Science China Earth Sciences2000，43，2： | 11 |
| 15 | Recent development of a refined multiple air pollutant emission inventory of vehicles in the Central Plains of China显示文摘Central Plains region of China,represented by Henan Province,is facing serious air pollution problems.Vehicular exhaust emissions had adverse impacts on the atmospheric environment.The first comprehensive and novel vehicle emission inventory for Henan Province using vehicle kilometers traveled,localized emission factors,and activity data at city-level was developed.Furthermore,3 km×3 km gridded emission and temporal variations were determined by using localized information.Results show that the total emissions of sulfur dioxide(SO2),nitrogen oxides(NOx),carbon monoxide(CO),particular matter with aerodynamic diameter<10μm(PM10),aerodynamic diameter<2.5μm(PM2.5),volatile organic compounds(VOCs),VOCs-evaporation and ammonia in 2015 were 9.1,533.4,1190.7,23.7,21.6,150.8,31.5 and 10.4 Gg,respectively,and the emission intensities of the above pollutants were 0.05,2.7,6.0,0.1,0.1,0.8,0.2 and 0.05 g/km,respectively.Vehicles meeting the Primary China 1,China 3 and China 4 contributed 89.1%,82.7%,75.3%,75.5%,75.5%,68.2%,68.4%and 82.3%for SO2,NOx,CO,PM10,PM2.5,VOCs,VOCs-evaporation and ammonia emissions,respectively.Zhengzhou,Zhoukou,Nanyang,Luoyang,Shangqiu and Xinyang showed relatively higher emissions and contributed more than 50%of each pollutant.The spatial distribution indicated obvious characteristics of the road network,and high-level emission was concentrated in the downtown areas.Additionally,the ozone formation potential(OFP)based on the estimated speciated VOC emissions was 569.6 Gg in Henan Province.Aliphatic and aromatic hydrocarbons were the main species of VOCs,whereas olefins contributed the largest proportion of OFP,with 42.2%. | Xingke Gu Shasha Yin Xuan Lu Huan Zhang Lingling Wang Ling Bai Chen Wang Ruiqin Zhang Minghao Yuan | 2019 | Journal of Environmental Sciences2019，31，10： | 11 |
| 16 | Protective effect of essential oil of Pistacia atlantica Desf. on peptic ulcer: role of α-pinene显示文摘OBJECTIVE: To evaluate the efficacy of Pistacia atlantica Desf. oleoresin essential oil on peptic ulcer(PU) and its antibacterial effect on metronidazole-resistant Helicobacter pylori, as well as chemi-cal composition of the essential oil.METHODS: The essential oil was standardized using gas chromatography mass spectrometry(GC/MS) analysis. Acute toxicity of the essential oil was assessed in animal model. In vitro anti-Helicobacter pylori activity was performed through disc diffusion and minimum inhibitory concentration method. For gastroprotective assay, rats received Pistacia atlantica Desf. essential oil(25, 50 and 100 mg/kg orally) 1 h before induction of ulcer by ethanol.Macroscopic(ulcer index and protection rate) and microscopic examination were performed.RESULTS: The GC/MS analysis of the essential oil led to the identification of twenty constituents andα-pinene is predominant constituent. The essential oil was safe up to 2000 mg/kg. All Helicobacter pylori strains were susceptible to the essential oil and the MIC ranged from 275 to 1100 μg/m L. The ulcer index for treated groups was significantly reduced compared to control(P < 0.001) with EC50 value of 12.32 mg/kg. In microscopic examination, Pistacia atlantica attenuated destruction and necrosis of gastric tissue.CONCLUSION: Current study exhibited protective effect of standardized Pistacia atlantica essential oil against ethanol-induced gastric ulcer and its antibacterial activity on Helicobacter pylori. α-pinene might be the responsible agent. | Zahra Memariani Mohammad Sharifzadeh Mahbubeh Bozorgi Mannan Hajimahmoodi Mohammad Hosein Farzaei Mahdi Gholami Farideh Siavoshi Parastoo Saniee | 2017 | Journal of Traditional Chinese Medicine2017，37，1： | 10 |
| 17 | Clove(Syzygium aromaticum):a precious spice显示文摘Clove(Syzygium aromaticum) is one of the most valuable spices that has been used for centuries as food preservative and Tor many medicinal purposes.Clove is native of Indonesia but nowadays is cultured in several parts of the world including Brazil in the slate of Bahia.This plant represents one of the richest source of phenolic compounds such as eugenol,eugenol acetate and gallic acid and posses great potential for pharmaceutical,cosmetic,food and agricultural applications.This review includes the main studies reporting the biological activities of clove and eugennl.The antioxidant and antimicrobial activity of clove is higher than many fruits,vegetables and other spices and should deserve special attention.A new application of clove as larvicidal agent is an interesting strategy to combat dengue which is a serious health problem in Brazil and other tropical countries.Pharmacokinetics and lexicological studies were also mentioned.The different studies reviewed in this work confirm the traditional use of clove as food preservative and medicinal plant standing out the importance of this plant for different applications. | Diego Francisco Cortés-Rojas Claudia Regina Fernandes de Souza Wanderley Pereira Oliveira | 2014 | Asian Pacific Journal of Tropical Biomedicine2014，4，2： | 8 |
| 18 | Geochemistry on mantle-derived volatiles in natural gases from eastern China oil/gas provinces (I)——A novel helium resource——commercial accumulation of mantle-derived helium in the sedimentary crust显示文摘Commercial accumulation of mantle-derived helium in the sedimentary shell is discussed. Generally speaking, a commercial helium pool is formed by accumulated 4He that comes from uranium and thorium via a-decay; therefore, it has a very low He/4He value in the magnitude of 10 . The helium concentration in some gas wells of eastern China oil/gas provinces is about or over 0.05%-0.1%, consequently forming commercial helium wells (pools), such as the Wangjinta Gas Pool in Songliao Basin, Huangqiao Gas Pool in North Jiangsu Basin and some gas wells in Sanshui Basin. Studies have proved that when the 3He/4He value of a helium gas pool is about 3.7×10 -6 -7.2× 10-6, namely mantle-derived helium in its total helium concentration accounts for 33. 5%-65.4%, it is a crust-mantle dual-source or dominantly mantle-derived helium gas pool, which is a novel helium resource and its formation is mainly related to the distribution of megafractures. | 徐永昌 沈平 陶明信 刘文汇 | 1997 | Science China Earth Sciences1997，40，2： | 8 |
| 19 | Emission factors, ozone and secondary organic aerosol formation potential of volatile organic compounds emitted from industrial biomass boilers显示文摘To evaluate the potential benefits of biomass use for air pollution control, this paper identified and quantified the emissions of major reactive organic compounds anticipated from biomass-fired industrial boilers. Wood pellets(WP) and straw pellets(SP) were burned to determine the volatile organic compound emission profiles for each biomass-boiler combination. More than 100 types of volatile organic compounds(VOCs) were measured from the two biomass boilers. The measured VOC species included alkanes, alkenes and acetylenes, aromatics, halocarbons and carbonyls. A single coal-fired boiler(CB) was also studied to provide a basis for comparison. Biomass boiler 1(BB1) emitted relatively high proportions of alkanes(28.9%–38.1% by mass) and alkenes and acetylenes(23.4%–40.8%),while biomass boiler 2(BB2) emitted relatively high proportions of aromatics(27.9%–29.2%)and oxygenated VOCs(33.0%–44.8%). The total VOC(TVOC) emission factors from BB1(128.59–146.16 mg/kg) were higher than those from BB2(41.26–85.29 mg/kg). The total ozone formation potential(OFP) ranged from 6.26 to 81.75 mg/m^3 with an average of 33.66 mg/m^3 for the two biomass boilers. The total secondary organic aerosol potential(SOAP) ranged from 61.56 to 211.67 mg/m^3 with an average of 142.27 mg/m^3 for the two biomass boilers.The emission factors(EFs) of TVOCs from biomass boilers in this study were similar to those for industrial coal-fired boilers with the same thermal power. These data can supplement existing VOC emission factors for biomass combustion and thus enrich the VOC emission inventory. | Chunmei Geng Wen Yang Xuesong Sun Xinhu Wang Zhipeng Bai Xia Zhang | 2019 | Journal of Environmental Sciences2019，31，9： | 8 |
| 20 | New advances in in-situ thermal desorption technology for contaminated soil显示文摘With the development of ecological civilization and economic construction,remediation of contaminated soils has caused more and more concern of scientists and engineers.Situ thermal desorption is a mature and effective technology which is especially suitable for the contaminated soil of relocated chemical plant[1,2],Compared with in-situ chemical oxidation and ectopic thermal desorption,the in-situ thermal desorption has stronger applicability and higher repair efficiency.The main applications of the in-situ thermal desorption technology are semi-volatile and volatile organic pollutants. | SHI Yan LUO ZiHao WANG YiXuan CAI MaoLin YANG LiMan | 2019 | Science China(Technological Sciences)2019，62，11： | 7 |
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