A new guaianolide from the roots of Valeriana fauriei Briq.

Aim To screen sedative constituents from Valeriana fauriei Briq. Result A new guaiane-type compound named as valerianin C was isolated from the roots of Valeriaaafauriei Briq. Conclusion The new compound was elucidated as 8α-acetoxyl-3α, 4α, 10-trihydroxyl-guaia- 1 （ 2 ）-ene- 12, 6α-olide on the basis of its NMR data, especially 2D- NMR techniques.

Biodegradation of ferulic acid by a newly isolated strain of Cupriavidus sp. B-8

As a major component of lignin and abundantly existing in softwood and hardwood, ferulic acid has been used as a lignin-related compound for lignin biodegradation study. Biodegradation of ferulic acid by Cupriavidus sp. B-8, a newly isolated strain, was studied. This strain is able to utilize a wide range of lignin-related aromatic compounds as the sole carbon and energy source, including guaiacol, veratric acid, vanillic acid, cinnamic acid, p-coumaric acid, ferulic acid, and sinapic acid. In addition, the effects of different concentrations of ferulic acid on growth of Cupriavidus sp. B-8 were studied. The growth of Cupriavidus sp. B-8 is better under the condition of lower concentration. High-performance liquid chromatography （HPLC） analysis reveals that above 95% of ferulic acid is degraded within 12 h by Cupriavidus sp. B-8. Based on identification of biodegradation intermediates and further metabolites, the biodegradation pathway of ferulic acid by Cupriavidus sp. B-8 was proposed. Ferulic acid is initially converted to 4-vinylguaiacol, and further oxidized to vanillic acid and protocatechuic acid.

Dietary guaiacol improves the growth of juvenile abalone,Haliotis discus hannai Ino

We conducted a preliminarily study on the effects of dietary guaiacol on growth performance of abalone, Haliotis discus hannai Ino. Seven semi-purified diets were formulated with graded levels of guaiacol （0, 5, 10, 50, 100, 500, and 1 000 mg kgl）. Abalone （initial weight： 0.29 ± 0.01 g; initial shell length： 8.55 ± 0.27 mm） were fed with these diets in a re-circulated water system for 152 days. Guaiacol significantly improved the specific growth rate （SGR） （P〈0.05）; excessive dietary guaiacol （1 000 mg kg1） led to significantly high mortality （P〈0.05）, and lipid content in the soft body increased significantly after dietary guaiacol （P〈0.05）. Activities of catalase and phenoloxidase （PO） in the viscera were significantly stimulated by dietary guaiacol （P〈0.05）. Broken-line analysis based on SGR indicated that the minimum dietary guaiacol for the optimal growth of juvenile abalone is 15.43 mg ·kg^-1.

Economic Impact of Mutant Cassava （Manihot Species） for Agricultural Improvement in Ghana

The importance of agricultural innovations for raising the living standards of farmers has received substantial attention from the economic and political communities. In Ghana, cassava serves as an important source of calorie and cash crop. Production constraints such as the cassava mosaic disease caused by virus have limit farmers access to productivity potentials and marketing. Breeding efforts attempting to address this constraints have had some success such as the mutant Tech Bankye virus resistant variety. This research, therefore, analysed the impact of some production input on mutant cassava productivity growth in Ghana with the use of Cobb-Douglas production function. Results show that farmers cultivate the mutant variety in addition to other traditional varieties to averse risking in marketing and income. The average cost of production of the mutant variety is higher compared to that of the traditional variety. Eighty percent of the farmers complained difficulty in accessing market for the mutant variety because it could not replace the traditional variety in terms of its texture for the local native ＂fufu＂ production and ＂ampesi＂ and also deteriorate quickly in storage. However, for industrial production of ＂gari＂ and starch, the mutant is the best. Both the mutant cassava and the traditional varieties showed increasing returns to scale, however, the returns to scale of the mutant variety were lower compared to that of the traditional variety. Also, the opportunity cost of forgoing the traditional varieties to cultivating the mutant variety was very high making adopted farmers hesitant to continue it cultivation.

Research on the Curriculum System for the Project Management Majored Entrepreneurial Talent

In this research article, we conduct research on the curriculum system for the project management majored entrepreneurial talent. The engineering management major construction and the oriented real estate industry, especially for the large and medium-sized backbone enterprises in civil engineering construction and the real estate enterprises train innovative, applied and compound of high-level engineering technology and the management talent. Entrepreneurship education student entrepreneurial ability is to make the students have successful entrepreneurial innovation ability, the development ability, organization and the core management ability, interpersonal communication and cooperation ability, comprehensive ability. Student entrepreneurial ability of high and low depends largely on the amount of corresponding knowledge in practice. Our research provides novel paradigm for the curriculum system construction and optimization for the universities.

小鲁班积木

作品类别:建构类作品主材:木头适玩年龄:大班幼儿设计灵感:我们幼儿园里树木成荫,得天独厚的自然条件创造了公共游戏区'木创工坊'。里面大量的木头成了孩子们爱不释手的建构材料。可是,一块普通的木头只能用来平铺、延长、垒高等。我园老师们利用木工坊里的工具,在不同长度的木头上开设等距离的槽口,在不改变木头牢固性的基础上.