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我国全要素生产率的测算及R&D溢出对其影响分析 被引量:2
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作者 卜晓莉 《石家庄经济学院学报》 2007年第1期55-60,共6页
运用索洛残差法估算1979-2004年的全要素生产率,并对我国全要素生产率增长和经济增长源泉做了简要分析;从新增长理论的一个分支——内生创新论出发,分析贸易影响一国创新率及全要素生产率变化的理论机制,运用内生创新论的Coe&Helpma... 运用索洛残差法估算1979-2004年的全要素生产率,并对我国全要素生产率增长和经济增长源泉做了简要分析;从新增长理论的一个分支——内生创新论出发,分析贸易影响一国创新率及全要素生产率变化的理论机制,运用内生创新论的Coe&Helpman的贸易的技术溢出模型对国内和国外溢出的R&D对我国全要素生产率增长的贡献进行实证分析。在理论分析和实证研究的基础上,提出了相关的政策建议。 展开更多
关键词 全要素生产率 索洛残差 贸易 R&D溢出
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Toxicity and phyto-bioactive constituent of Ficus aurea L. leaf extract: A trado-medicinal herb used in southeastern Nigeria 被引量:1
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作者 Sonachi Nnedimma Okeke Chinyere Godwin Chinyere Okezie Emmanuel 《Clinical Traditional Medicine and Pharmacology》 2024年第4期54-64,共11页
Background:The intrinsic adroitness of medicinal plants as a therapy for several maladies is well-documented in African Herbal Pharmacopeia.Leaves of Ficus aurea L.(Moraceae)are commonly used in folkloric medicine in ... Background:The intrinsic adroitness of medicinal plants as a therapy for several maladies is well-documented in African Herbal Pharmacopeia.Leaves of Ficus aurea L.(Moraceae)are commonly used in folkloric medicine in southeastern Nigeria and other areas of the world to treat malaria,dermatitis,circulatory and intestinal parasitic health abnormalities.Objective:The aim of the study was to explore the phytochemical composition and potential toxicity of the ethanolic leaf extract of F.aurea L.(herein afterwards referred to as ELEFA)in albino rats of both sexes.Methods:Gas chromatography mass spectrometry(GC–MS)was performed to analyze the chemical constituents of F.aurea.In the acute toxicity study,a single oral dose of up to 5000 mg/kg ELEFA was administered.For the sub-acute toxicity study,rats were randomly assigned to individual cages to eschew copulation.Male groups(A2-A4)and female groups(B2-B4)were administered varying doses of ELEFA(250,500,750 mg/kg)for 28 days,while control groups A1 and B1 received 1 mL/kg of distilled water.Standard analytical procedures were utilized to evaluate the biochemical and haematological profiles,as well as liver and kidney histopathology.Results:The GC–MS analysis identified 13 phyto-compounds,six of which possess known bioactive and pharmacological properties.These bioactive compounds include gamma-dodecalactone,n-hexadecanoic acid,methyl stearate,9,12-octadecadienoic acid,oleic acid,octadecanoic acid.In the acute toxicity,no death was recorded within 24 h following oral administration of ELEFA.Remarkably,haematological and renal biomarkers remained unaltered post-ELEFA administration.However,elevated levels of serum aspartate and alanine transaminases were detected in ELEFA-treated groups,indicating potential hepatotoxicity.A reduction in atherogenic lipid markers and a dose-dependent elevation in antioxidant concentrations were observed,suggesting a nuanced impact on oxidative stress.Conclusion:The study emphasized caution regarding higher ELEFA doses,highlighting poten 展开更多
关键词 ANTIOXIDANT Ficus aurea PHYTOCHEMICAL TOXICITY trado-medicine
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Socio-economic importance and utilization of Spondias mombin in Nigeria
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作者 Adedokun MO Oladoye AO +1 位作者 Oluwalana SA Mendie Ⅱ 《Asian Pacific Journal of Tropical Medicine》 SCIE CAS 2010年第3期232-234,共3页
Objective:To investigate the socio-economics and medicinal utilization of Spondia monbin, commonly known as plum in English and iyeye in Yoruba.Methods:Three communities were selected in Abeokuta which was Itoku,Kuto,... Objective:To investigate the socio-economics and medicinal utilization of Spondia monbin, commonly known as plum in English and iyeye in Yoruba.Methods:Three communities were selected in Abeokuta which was Itoku,Kuto,and Omida using purposive random sampling technique because of the concentration of users in the area.Structured questionnaire was administered to randomly selected marketers,consumers and herbalists from the three communities.Utilization and marketing margin were descriptively analyzed.Results:The results showed that the leaves were being used for child birth aid,cough,sore throat,efu dudu,antiseptic soap,malaria and stomachic.The bark uses included child birth aid,inflammation concoction, fever,stomachic,malaria,and efu dudu.The uses of the fruit included cure for dizziness, stomachic,eaten as food,and fibroid.The seed were also being used for child birth aid,fibroid, and stomachic.The marketing margin analyses revealed that trading on the plants was profitable with the bark having the highest margin which showed the level of its profitability.Conclusions: The study reveals the medicinal potentials and the socioeconomic importance of Spondia mombin hence the need to conserve the species from unsustainable exploitation to ensure its availability. 展开更多
关键词 Spondia mombin trado-medical practitioners Market MARGIN MEDICINAL USES Marketers
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吉林市实现灭蝇达标市技术措施的研究 被引量:1
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作者 杨松君 余影 +3 位作者 王大力 王集香 舒恩俊 高兰英 《中国媒介生物学及控制杂志》 CAS CSCD 1990年第2期78-82,共5页
吉林市大面积灭蝇工作,通过三年的现场防治研究,采取以环境防治为主的治本措施,选择适宜的杀虫剂及可靠剂型,使用毒杀和诱杀等器械,同时辅以人工捕打成蝇及粪便高温发酵灭蛆等方法,延缓或降低蝇类的抗药性,提高灭蝇效果。结果使蝇类孳... 吉林市大面积灭蝇工作,通过三年的现场防治研究,采取以环境防治为主的治本措施,选择适宜的杀虫剂及可靠剂型,使用毒杀和诱杀等器械,同时辅以人工捕打成蝇及粪便高温发酵灭蛆等方法,延缓或降低蝇类的抗药性,提高灭蝇效果。结果使蝇类孳生率下降了88.89%,成蝇繁殖高峰季节密度较常年下降了89.89~96.81%,防治区与对照区有非常显著的差异,达到预期效果,实现了全国爱卫会办公室规定的灭蝇达标先进市标准,取得显著的社会效益和经济效益。 展开更多
关键词 灭蝇 防治 措施 吉林
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