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Performance, Emission and Combustion Characteristics of Dual Fuel (DF) Engine Fuelled with Hydrogen Induction and Injection of Honne and Honge Methyl Esters
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作者 Rajshekhar S. Hosmath Nagaraj R. Banapurmath +4 位作者 Mallikarjuna Bhovi Sanjeevkumar V. Khandal Ajitkumar P. Madival Shashikumar S. Dhannur Varunkumar Gundalli 《Energy and Power Engineering》 2015年第9期384-395,共12页
Renewable fuels like hydrogen and biodiesels can very well suit to diesel engine applications as they address problems of energy scarcity, foreign exchange savings and emission norms. Production of hydrogen and biodie... Renewable fuels like hydrogen and biodiesels can very well suit to diesel engine applications as they address problems of energy scarcity, foreign exchange savings and emission norms. Production of hydrogen and biodiesel to industrial scale with low cost techniques can pave way for their efficient use in engine applications. In view of this, an attempt has been made to operate a modified diesel engine on these high potential renewable fuel combinations. An experimental study was carried out to evaluate the performance, combustion and emission characteristics of diesel engine operated in dual fuel (DF) mode fuelled with esters of honne (EHNO), honge (EHO) oils and hydrogen induction. The study revealed that the brake thermal efficiency increased up to 20% hydrogen energy ratio (HER) and then it decreased. The emissions such as hydrocarbon (HC), Carbon monoxide (CO) and smoke decreased with HER while oxides of nitrogen (NOx) increased. The combustion parameters like peak pressure, ignition delay and heat release rate (HRR) increased with HER. 展开更多
关键词 HYDROGEN Carburetion ESTER of Honne OIL (EHNO) ESTER of honge OIL (EHO) HYDROGEN Energy Ratio (HER)
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基于共享储能站的多能互补微能源网外衍响应双层优化
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作者 李金 刘科孟 +4 位作者 许丹莉 高为举 黄磊 吴浩星 华昊辰 《中国电力》 北大核心 2025年第2期43-56,共14页
高比例新能源接入能源系统带来的强不确定性使系统内部优化运行变得困难,同时可能导致不确定性风险外溢,从而影响到上级电网稳定运行。为此,提出了一种基于共享储能站的多能互补微能源网系统外衍响应双层协调优化策略。首先,构建了微能... 高比例新能源接入能源系统带来的强不确定性使系统内部优化运行变得困难,同时可能导致不确定性风险外溢,从而影响到上级电网稳定运行。为此,提出了一种基于共享储能站的多能互补微能源网系统外衍响应双层协调优化策略。首先,构建了微能源网系统能源设备运行模型,并提出了共享储能站运行方式和盈利机制。其次,以微能源网系统运营商为上层,共享储能站运营商为下层,建立考虑2个不同利益体的双层协调优化模型。然后,通过Hong的(2m+1)点估计法量化风光不确定性,并利用基于KKT条件和Big-M将双层非线性优化模型转化为单层混合整数优化模型。最后,仿真结果表明该策略能有效防止风光不确定性风险外溢,减少了微能源网运营商6.3%的运行成本。 展开更多
关键词 微能源网系统 风险外溢 共享储能站 Hong的(2m+1)点
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Impact of atmospheric O_(3)and NO_(2)on the secondary sulfates in real atmosphere
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作者 Kai Shi Xiaoli Mei +1 位作者 Chih-rung Chen Chunqiong Liu 《Journal of Environmental Sciences》 2025年第4期277-287,共11页
As an important component of secondary aerosols,sulfate plays a crucial role in regulating atmospheric radiative balance and influencing the secondary formation of ozone(O_(3)).In real atmosphere,atmospheric oxidants ... As an important component of secondary aerosols,sulfate plays a crucial role in regulating atmospheric radiative balance and influencing the secondary formation of ozone(O_(3)).In real atmosphere,atmospheric oxidants NO_(2)and O_(3)can promote the oxidation of SO_(2)to form sulfate(SO_(4)^(2−))through multiphase chemistry that occur at different time scales.Due to the combined impact of meteorology,pollution sources,atmospheric chemistry,etc.,time-scale dependence of SO_(2)-SO_(4)^(2−)conversion makes the impact of NO_(2)/O_(3)on it more complex.In this study,based on long-term time series(2013-2020)of air pollution variables from seven stations in Hong Kong,the Multifractal Detrended Cross-Correlation Analysis(MFDCCA)method has been employed to quantify the cross-correlations between SO_(2)and SO_(4)^(2−)in real atmosphere at different time scales,for examining the time-scale dependence of SO_(2)-SO_(4)^(2−)conversion efficiency.Furthermore,the Pearson correlation analysis has been used to study the influence of NO_(2)/O_(3)on SO_(2)-SO_(4)^(2−)conversion,and the regional and seasonal differences have been analyzed by considering factors such as meteorology,pollution sources,and regional transport.Changes in the main components of secondary aerosols are closely linked with the co-control of regional PM_(2.5)and O_(3).Therefore,the exploration of the impact of co-existing NO_(2)/O_(3)gases on the secondary formation of sulfates in real atmosphere is significant. 展开更多
关键词 SULFATE Nitrogen dioxide OZONE Multifractal detrended cross-correlation analysis Hong Kong
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A Reply to My Friend
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作者 贺伟 张超(指导) 《中学生英语》 2025年第21期7-7,共1页
Dear Li Mingchao,How are you?I miss you very much.Many thanks for the leather jacket!I really love it.Green is my favorite color!You kept it in mind!It's just my size.Every time I wear it,I think of you.I'm fi... Dear Li Mingchao,How are you?I miss you very much.Many thanks for the leather jacket!I really love it.Green is my favorite color!You kept it in mind!It's just my size.Every time I wear it,I think of you.I'm fine here in Hong Kong.Last week I had a birthday party. 展开更多
关键词 birthday party leather jacket green leather jacket i Hong Kong
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Reevaluating Jiao Hong’s Position in Intellectual History: A Book Review of Yumin Dai’s On Jiao Hong and Ming-Qing Confucianism
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作者 WANG Rongjiao 《Philosophy Study》 2025年第1期42-44,共3页
Yumin Dai’s book On Jiao Hong and Ming-Qing Confucianism represents a significant advancement in recent Confucianism research.The book comprises two parts:the first three chapters delve into Jiao Hong’s“intellectua... Yumin Dai’s book On Jiao Hong and Ming-Qing Confucianism represents a significant advancement in recent Confucianism research.The book comprises two parts:the first three chapters delve into Jiao Hong’s“intellectual shift”in reconstructing mind teaching through the lens of“name-reality”and“thought”,integrating textual research into moral cultivation and using Buddhist and Taoist ideas to soften the metaphysical aspects of religious syncretism.The final three chapters situate Jiao Hong within the Ming-Qing Confucian transformation,bridging the Ming Dynasty’s revised mind teaching with Qing Dynasty’s Qi-oriented teaching,and paving the way for Qianlong-Jiaqing textual research.The author introduces the dual-track transformation theory,breaking the traditional single-track framework,emphasizing dual changes in doctrines and methodologies during the Ming-Qing Confucian transformation.Methodologically,it blends a macro perspective with micro-analysis,overcoming intellectual history fragmentation.Theoretically,it highlights Jiao Hong’s pivotal role in connecting the Confucianism in Ming and Qing dynasties,objectively assessing his incomplete thoughts and historical limitations,and revealing tensions between intellectual rationality and value beliefs.This research redefines Jiao Hong’s place in intellectual history and offers a fresh interpretation of Ming-Qing Confucian transformation. 展开更多
关键词 Jiao Hong CONFUCIANISM mind teaching intellectualization
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The 2,500 exhibits were shown in Hong Kong region
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作者 李全忠 《疯狂英语(新读写)》 2025年第3期41-43,76,共4页
1 Thousands of giant panda sculptures greeted residents and tourists starting on December 7,2024,in Hong Kong region,where enthusiasm for the pandas had grown since two cubs were born in a local theme park.2 The 2,500... 1 Thousands of giant panda sculptures greeted residents and tourists starting on December 7,2024,in Hong Kong region,where enthusiasm for the pandas had grown since two cubs were born in a local theme park.2 The 2,500 exhibits were shown at a launch ceremony of PANDA GO!FEST HK,the city's largest panda‑themed exhibition,at Hong Kong's airport on December 2,2024.They were next publicly displayed at the Avenue of Stars in Tsim Sha Tsui,a popular shopping district,before moving to three other locations that month. 展开更多
关键词 exhibition giant panda sculptures PANDA launch ceremony Hong Kong tourism avenue stars Avenue Stars
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Chinese Medicine in Hong Kong,1842-1941
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作者 Patrick Chiu 《Chinese Medicine and Culture》 2025年第3期326-337,共12页
This article examines the complex interplay between Chinese medical and pharmaceutical practices and the introduction of Western medicine and pharmacy in China,with a particular focus on the British administration’s ... This article examines the complex interplay between Chinese medical and pharmaceutical practices and the introduction of Western medicine and pharmacy in China,with a particular focus on the British administration’s efforts to marginalizing Chinese medicine in Hong Kong from 1842 to 1941.Soon after the British occupation of Hong Kong in 1841,the Hong Kong government promulgated laws and regulations governing the sale,supply,distribution,and manufacture of opium and potent medicines(aka“poisons”).These laws,based on parliamentary acts passed in Westminster,marginalized Chinese medicine and pharmacy and empowered Western medical doctors,chemists,and druggists as the sole providers of these services.Despite this,Chinese medicine and pharmacy remained the preferred therapeutic system of the local Chinese population.However,minimal resources were allocated to the sector or support for practitioners of Chinese medicine and pharmacy,even though they served most of the population.The British Hong Kong administration seized two key opportunities which shifted the balance in favor of Western medicine and pharmacy.The first was during the 1894 bubonic plague,when the British Hong Kong administration funded a Western medicine clinic at the Tung Wah Hospital in Sheung Wan,with a short-lived effect.The second,with lasting impact,was the mass influx of refugees fleeing Kwangtung(now Guangdong)to Hong Kong in 1938,which led to the three independently managed Tung Wah hospitals(the Hospitals)merging into one Hospital Group at the urging of the British Hong Kong administration,due to funding issues by local philanthropists.Western medicine thus became the mainstream therapeutic system for in-patients at the Hospital Group. 展开更多
关键词 Chinese medicine Hong Kong CHEMISTS Apothecaries Tung Wah Hospital Western medicine History of medicine
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Chinese Documentaries
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《China Today》 2025年第9期49-49,共1页
The Sanggamryong Campaign Chief Planners:Chen Yuren,Hu Hong,and Zhang Yuan Length:Three Episodes Producers:SMG Documentary Center,BesTV,and bilibili Broadcasting Platform:bilibili The film series focuses on the famous... The Sanggamryong Campaign Chief Planners:Chen Yuren,Hu Hong,and Zhang Yuan Length:Three Episodes Producers:SMG Documentary Center,BesTV,and bilibili Broadcasting Platform:bilibili The film series focuses on the famous battle of Sanggamryong in 1952 during the War to Resist U.S.Aggression and Aid Korea,presenting the three stages of the campaign in three aspects of military strategies,weapons,and heroes.It showcases many textual and visual archives from the Republic of Korea. 展开更多
关键词 textual visual archives Textual Archives Hu Hong HEROES Chen Yuren Zhang Yuan Military Strategies Sanggamryong Campaign
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The Translation Unity of Chinese Medicine Terms in Two English Versions of Hong Lou Meng
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作者 Xuewen Wang Chenghang Lin 《Journal of Contemporary Educational Research》 2025年第10期156-163,共8页
One of the important ways to explore the value of traditional Chinese medicine(TCM)is by reading Chinese classical literature.Taking David Hawkes’and Yang Xianyi’s English translation versions of Hong Lou Meng as ex... One of the important ways to explore the value of traditional Chinese medicine(TCM)is by reading Chinese classical literature.Taking David Hawkes’and Yang Xianyi’s English translation versions of Hong Lou Meng as examples,this article makes a contrastive analysis between their TCM translations,including Chinese herbs and Chinese medicine terms.It shows that it is a great challenge to keep a balance between the precision of scientific and technical terminology and the culture embodied in literary works.Both of them rarely use transliteration,but prefer to translate in a popular and scientific style,etc.Their popularized translation can not only have a positive influence on enlightenment and reference to TCM translation now,but also help standardize TCM translation,and play a significant role in the global spread of TCM. 展开更多
关键词 Hong Lou Meng Traditional Chinese medicine TRANSLATION UNITY
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FOCUS
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《China Today》 2025年第12期6-15,共10页
PHOTO NEWS Unity and Shared Development China’s 15th National Games,co-hosted by Guangdong,Hong Kong,and Macao,was held from November 9 to 21,2025.For the first time,the three regions have joined hands to host the co... PHOTO NEWS Unity and Shared Development China’s 15th National Games,co-hosted by Guangdong,Hong Kong,and Macao,was held from November 9 to 21,2025.For the first time,the three regions have joined hands to host the country’s premier multi-sport event,fostering closer ties across the Greater Bay Area and demonstrating fresh vitality under the One Country,Two Systems policy. 展开更多
关键词 GUANGDONG One Country Two Systems Multi sport Event Shared Development UNITY Hong Kong National Games MACAO
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A Quiet Revolution in Global Justice
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作者 AYANDA HOLO 《ChinAfrica》 2025年第7期16-17,共2页
What the newly established mediation body in China’s Hong Kong means for Africa In a world fraying under geopoliti-cal tensions,legal asymmetry,and fragmented global governance,the launch of the International Organis... What the newly established mediation body in China’s Hong Kong means for Africa In a world fraying under geopoliti-cal tensions,legal asymmetry,and fragmented global governance,the launch of the International Organisation for Mediation(IOMed)in China’s Hong Kong on 30 May is much more than a diplomatic novelty.It is a strategic recalibration of how the Global South,particularly African nations,might resolve disputes without surrendering sovereignty or dignity. 展开更多
关键词 African nations global justice international organisation mediation iomed mediation body SOVEREIGNTY DIGNITY quiet revolution Chinas Hong Kong
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Correction:Investigation on the mechanism of Qi-Hong-Tang-Zu ointment in thetreatmentofdiabetic wound by network pharmacology and experimental validation
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《Traditional Medicine Research》 2025年第12期73-74,共2页
Traditional Medicine Research published an article entitled Investigation on the mechanism of Qi-Hong-Tang-Zu ointment in thetreatmentofdiabetic wound by network pharmacology and experimental validation on 24 January ... Traditional Medicine Research published an article entitled Investigation on the mechanism of Qi-Hong-Tang-Zu ointment in thetreatmentofdiabetic wound by network pharmacology and experimental validation on 24 January 2025.The author confirmed this article’s proof on 23 January 2025 without any questions.But on 06 July 2025,the editorial team found,there was an error in Figure 8.Specifically,Figure 8E,Figure 8F and Figure 8G were mistakenly duplicated.The authors acknowledge that the original version of Figure 8 was incorrect and have provided the revised,correct version in this corrigendum.The authors would like to assert that there is no change in the body text of the article. 展开更多
关键词 network pharmacology experimental validation Qi Hong Tang Zu ointment diabetic wound
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Relational characteristics and dynamics between high-tech firms in the Pearl River Delta and the empowerment for technological innovation by Hong Kong region
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作者 XU Jili Anthony G.O.YEH +3 位作者 George C.S.LIN LIU Xingjian YANG Fan Fiona LUO Zixin 《Journal of Geographical Sciences》 2025年第2期382-408,共27页
The perfection of the cross-border regional innovation system of the Pearl River Delta(PRD)and Hong Kong region remarkably underpins the construction of the Guangdong-Hong Kong-Macao Greater Bay Area(GBA)towards an in... The perfection of the cross-border regional innovation system of the Pearl River Delta(PRD)and Hong Kong region remarkably underpins the construction of the Guangdong-Hong Kong-Macao Greater Bay Area(GBA)towards an international technological innovation hub.This paper focuses on the relational characteristics of the usage of technological innovation functions and elements,including labor force,technology,and producer services from Hong Kong region by high-technology firms in the PRD,and probes into the influencing factors by integrating the objective perspective on the impact of firm-level socioeconomic attributes and subjective perspective on the open interpretations on the reasons by using or not using technological innovation functions and elements from Hong Kong region by various stakeholders in high-technology domains in the PRD.Key research findings are fourfold.First,Hong Kong's technological innovation functions primarily ride on its institutional advantages under the“One Country,Two Systems”framework to empower high-technology firms in the PRD by expanding their international market,international business operation,and financing,but cross-border investment and entrepreneurship has retrieved to a relatively marginalized position.The degree of supply-demand relations of producer services is the highest,followed by labor force and technology.Second,Hong Kong-invested,large-sized,and long-standing high-technology firms in the PRD are more inclined to use technological innovation elements from Hong Kong region,while domestic,small-and-medium-sized,and start-up high-technology firms in the PRD are in turn,gradually unhooked from the supply of technological innovation elements from Hong Kong region.Third,Hong Kong enjoys both advantages and disadvantages in supplying labor forces,technologies,and producer services to high-technology firms in the PRD,with advantages in competitiveness,international linkages and visions,and disadvantages in high cost,lack of more profound mutual understanding between Hong Kong and the PRD,and the imperfect cooperation mechanisms.Fourth,interactions among the transitioning role of Hong Kong region in the macro-level global and national economic development landscape,meso-level cross-border regional specificities under the“One Country,Two Systems”framework,and micro-level heterogeneous practices and capabilities of firms influence the usage of technological innovation functions and elements from Hong Kong region by high-technology firms in the PRD. 展开更多
关键词 regional innovation system high-technology industries high-technology firms Guangdong-Hong Kong-Macao Greater Bay Area Pearl River Delta Hong Kong region
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2024 Top Ten News of China's Paper Industry
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作者 《造纸信息》 2025年第10期145-157,共13页
Top 1 Vinda International Holdings Limited was acquired by Golden Eagle Group On March 12,2024,Vinda International Holdings Limited issued an announcement,stating that Singaporebased RGE Group had completed the acquis... Top 1 Vinda International Holdings Limited was acquired by Golden Eagle Group On March 12,2024,Vinda International Holdings Limited issued an announcement,stating that Singaporebased RGE Group had completed the acquisition of Vinda International whit a price of HK$23.5 per share and a total consideration of approximately HK$26.1 billion.On August 16,a?t er the acquisition was completed,Vinda International was offi cially delisted from the Hong Kong Stock Exchange. 展开更多
关键词 Golden Eagle Group vinda international Hong Kong Stock Exchange Vinda International Holdings Limited delisting RGE Group acquisition golden eagle group
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Weaving China-EU Tech Ties
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作者 ZHANG HUI 《China Today》 2025年第9期50-52,共3页
AGAINST the backdrop of the 25th China-EU Summit,where leaders emphasized the importance of stable bilateral ties amid global challenges,a delegation of European youth leaders is expl oring pathways to bring Chinese i... AGAINST the backdrop of the 25th China-EU Summit,where leaders emphasized the importance of stable bilateral ties amid global challenges,a delegation of European youth leaders is expl oring pathways to bring Chinese innovation to their home countries.Their tour of China’s Guangdong-Hong Kong-Macao Greater Bay Area underscores a shared commitment to technological collaboration. 展开更多
关键词 youth leaders Guangdong Hong Kong Macao greater bay area technological collaboration China EU tech ties
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Styles and Characteristics of Thematic Art Creation in Hong Kong,Macao,and Taiwan Regions
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作者 Yanqing Liu 《Journal of Contemporary Educational Research》 2025年第1期255-261,共7页
This article explores the styles and characteristics of thematic art creation in Hong Kong,Macao,and Taiwan regions,analyzing the uniqueness of these regions’artistic backgrounds,artistic languages,theme selections,a... This article explores the styles and characteristics of thematic art creation in Hong Kong,Macao,and Taiwan regions,analyzing the uniqueness of these regions’artistic backgrounds,artistic languages,theme selections,and expressive techniques.The art creation in Hong Kong,Macao,and Taiwan regions is deeply influenced by traditional Chinese culture while incorporating Western artistic elements,exhibiting a diversified artistic style.Thematic art creation in these three regions has its own distinct features,including a deep exploration of local culture and a sensitive capture of the spirit of the times,which together constitute a rich and colorful artistic landscape in Hong Kong,Macao,and Taiwan regions. 展开更多
关键词 Hong Kong Macao and Taiwan regions Thematic art creation Artistic style
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Comparative prognostic performance of staging systems for hepatocellular carcinoma:Evidence from a Vietnamese cohort study
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作者 Tuong-Anh Mai-Phan Trong-Kha Nguyen +2 位作者 Tri-Nhan Pham Minh-Quang Tran Kim-Long Le 《World Journal of Hepatology》 2025年第5期81-100,共20页
BACKGROUND Hepatocellular carcinoma(HCC),the sixth most common cancer and fourthleading cause of cancer-related mortality globally,imposes a significant burden in Vietnam due to endemic hepatitis B virus(HBV)and hepat... BACKGROUND Hepatocellular carcinoma(HCC),the sixth most common cancer and fourthleading cause of cancer-related mortality globally,imposes a significant burden in Vietnam due to endemic hepatitis B virus(HBV)and hepatitis C virus(HCV)infections.Accurate prognostication is crucial for optimizing treatment and outcomes.Numerous staging systems exist,including the Barcelona Clinic Liver Cancer(BCLC),Hong Kong Liver Cancer(HKLC),cancer of the liver Italian Program(CLIP),Italian Liver Cancer(ITA.LI.CA),Japan Integrated Staging(JIS),Tokyo Score,and model to estimate survival in ambulatory HCC patients(MESIAH).However,their comparative performance in Vietnamese patients remains underexplored.AIM To compare the prognostic accuracy of seven HCC staging systems in predicting survival and identify the optimal model.METHODS This retrospective cohort study included 987 patients with HCC diagnosed at Nhan dan Gia Dinh Hospital,Vietnam,from January 2016 to December 2023.Patients were staged using BCLC,HKLC,CLIP,ITA.LI.CA,JIS,Tokyo score,and MESIAH.Overall survival was analyzed using Kaplan-Meier methods,and prognostic performance was evaluated via the area under the receiver operating characteristic(ROC)curve,Harrell’s concordance index,and calibration plots.RESULTS The HKLC and BCLC systems demonstrated the highest discriminatory ability,with area under the ROC curves of 0.834 and 0.830,respectively,at 12 months and 0.859 for both systems at 36 months.CLIP and ITA.LI.CA exhibited superior calibration,particularly at 36 months.The JIS system consistently showed the poorest discriminatory performance.Subgroup analyses revealed that HKLC maintained strong performance across different viral etiologies(HBV,HCV,non-B-non-C)and treatment modalities(transarterial chemoembolization,surgery,ablation).CONCLUSION The HKLC and BCLC systems showed superior prognostic performance for Vietnamese patients with HCC,supporting HKLC adoption in clinical practice. 展开更多
关键词 Hepatocellular carcinoma Prognostic staging systems Barcelona Clinic Liver Cancer Hong Kong Liver Cancer Survival analysis Prognostic performance Non-B-non-C Retrospective cohort study Vietnam Viral hepatitis B Viral hepatitis C
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Commercializing Green Energy Innovations Organized application of research achievements in the green energy industry highlights the dynamics of the Guangdong-Hong Kong-Macao Greater Bay Area (GBA) and Chinese wisdom
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作者 Tian Yuan Huang Jiangqin 《China Report ASEAN》 2025年第5期46-46,共1页
Recently,the first cross-border matchmaking meeting of 2025 for the application of offshore wind power research outcomes took place in Yangjiang,Guangdong Province.Hosted by the GBA Institute of Industry and Talent(GB... Recently,the first cross-border matchmaking meeting of 2025 for the application of offshore wind power research outcomes took place in Yangjiang,Guangdong Province.Hosted by the GBA Institute of Industry and Talent(GBAIIT),the event spotlighted the cross-axis wind turbine(CAWT),a technology developed by the task force headed by Chong Wen Tong,a fellow with the Academy of Sciences Malaysia and director of the Center for Energy Sciences at the University of Malaya. 展开更多
关键词 research application energy sciences cross axis wind turbine offshore wind power research outcomes Guangdong Hong Kong Macao Greater Bay Area offshore wind power Chinese wisdom cross border matchmaking
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凤丹(Paeonia ostii T.)自毒物质的检测及其作用机制 被引量:35
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作者 覃逸明 聂刘旺 +3 位作者 黄雨清 王千 刘欣 周科 《生态学报》 CAS CSCD 北大核心 2009年第3期1153-1161,共9页
药用牡丹的种植中存在明显的连作障碍现象,为探讨其机制,利用已萌发长根的凤丹(Paeonia ostii)种子对凤丹根际土壤和根的水浸提液进行了自毒化感检测;采用高效液相色谱法(HPLC)对种植4a的凤丹根际土壤及其根皮中的化感自毒物质进行了定... 药用牡丹的种植中存在明显的连作障碍现象,为探讨其机制,利用已萌发长根的凤丹(Paeonia ostii)种子对凤丹根际土壤和根的水浸提液进行了自毒化感检测;采用高效液相色谱法(HPLC)对种植4a的凤丹根际土壤及其根皮中的化感自毒物质进行了定性和定量分析;在此基础上,利用外源法研究了盆栽凤丹幼苗对5种检出物质(阿魏酸、肉桂酸、香草醛、香豆素和丹皮酚)及其混合物在3种不同浓度下对植株生长的影响和生理响应。结果表明:(1)连续种植4a的凤丹根际土壤和根浸提液对已萌发种子根的生长有显著的抑制作用(p<0.05),显示凤丹根分泌物具有自毒化感的潜势;(2)HPLC分析表明在凤丹根际土壤中存在5种以上的酚酸类物质(阿魏酸、肉桂酸、香草醛、香豆素和丹皮酚),其中阿魏酸、肉桂酸、香草醛、香豆素为前人已报道的化感物质;(3)在实验室条件下,所设浓度范围内,5种物质及其混合物对凤丹幼苗的高度、根长及地下和地上生物量均有明显影响,尤其对根长和地下生物量的影响最为明显(p<0.05),此结果与连作移栽幼苗时,根部首先发黑死亡的现象相一致;(4)凤丹幼苗的根系活力和叶绿素含量在各处理中表现出相似性,即低浓度时根系活力和叶绿素含量高,高浓度时根系活力和叶绿素含量低,低浓度的阿魏酸和香草醛对幼苗根系活力和叶绿素合成有促进作用。此结果显示自毒物质可能是通过影响根系酶活性和叶绿素合成来影响群体中其它个体的生长。本实验的结果显示栽培4a的凤丹土壤水提液具有抑制自身种子根系生长的活性,此提示栽培凤丹连作障碍可能主要与自身分泌到土壤中的酚酸类物质的自毒作用有关。 展开更多
关键词 凤丹(Paeonia ostii T.Hong ET J.X.Zhang) 自毒作用 自毒物质 作用机制
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亚硝酸盐在雪里蕻腌制过程中生成规律的研究 被引量:40
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作者 郑桂富 许晖 武杰 《四川大学学报(工程科学版)》 EI CAS CSCD 2000年第3期85-87,共3页
亚硝酸盐是一种对人体有害的物质。试验详细研究了雪里蕻腌制过程中亚硝酸盐的形成规律 ,通过试验找出了亚硝酸盐的形成与雪里蕻腌渍液的食盐浓度、温度、酸度、含糖量及杂菌污染的关系 。
关键词 雪里Hong 腌制 亚硝酸盐 生成规律 蔬菜
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