Efficient production of pullulan by Aureobasidium pullulans using a multi-objective optimization strategy with orthogonal experimental design coupling artificial neural network and genetic algorithm.

Efficient pullulan production has long been a central research focus. This study used maltodextrin as the carbon source for pullulan production by Aureobasidium pullulans fermentation. A hybrid optimization approach, integrating orthogonal experimental design (OED), backpropagation artificial neural network (BP-ANN), and elite strategy non-dominated sequential genetic algorithm-II (NSGA-II), was developed.

Modelling optimal water retention in hydrogenic habitats using LIDAR laser data.

Degradation of hydrogenic habitats in climate change increased rapidly. It is important that we take actions to stop this process. Solution is to increase efficiency of water usage by ecosystems - especially water based ones.

Effects of Fe addition to sugarcane molasses on poly-γ-glutamic acid production in Bacillus licheniformis CGMCC NO. 23967.

Background: Poly-γ-glutamic acid (γ-PGA) is biodegradable, water-soluble, environment-friendly, and edible. Consequently, it has a variety of industrial applications. It is crucial to control production cost and increase output for industrial production γ-PGA.

The complete chloroplast genome sequence of (Wall.) Decne.

(Wall.) Decne. (Duo-Yi) is a high economic value for exploitation and utilization wild fruit tree species with edible and medicinal values in southwest China.

[Temporal and spatial variation of polysaccharides and alcohol-soluble extractives of Polygonatum cyrtonema].

To reveal the variation of polysaccharides and alcohol-soluble extractives of rhizomes Polygonatum cyrtonema from different producing areas,growing years,and harvesting seasons,25 wild samples from the main producing areas( provenances) of China and 6 artificial cultivated samples were collected and detected. The 6-year-old rhizomes of the artificial cultivation were gathered from Qingyuan,Zhejiang every 2 months during 2016 to 2017. Anthrone-sulfuric acid method and hot-dip method were used to determine the contents of polysaccharides and alcohol-soluble extractives respectively.

[Status of Polygonati Rhizome industry and suggestion for its sustainable development].

Field surveys and literatures show that Polygonati Rhizome (Huangjing) was firstly recorded in Shen Nong&s Herbal Classic, and widely used as a medicinal and edible plant. It has a long history of cultivation, and the researches on chemistry have made some progress. The future development is prospected on health market.

Impact of nitrogen fertilization on soil-Atmosphere greenhouse gas exchanges in eucalypt plantations with different soil characteristics in southern China.

Nitrogen (N) fertilization is necessary to sustain productivity in eucalypt plantations, but it can increase the risk of greenhouse gas emissions. However, the response of soil greenhouse gas emissions to N fertilization might be influenced by soil characteristics, which is of great significance for accurately assessing greenhouse gas budgets and scientific fertilization in plantations. We conducted a two-year N fertilization experiment (control [CK], low N [LN], middle N [MN] and high N [HN] fertilization) in two eucalypt plantations with different soil characteristics (higher and lower soil organic carbon sites [HSOC and LSOC]) in Guangxi, China, and assessed soil-atmosphere greenhouse gas exchanges.

[Effects of age classes on metabolic exponents of Salix psammophila branches.].

Metabolisms are fundamental processes of organisms. They are related to carbon and water cycling of a plant. The relationship between the metabolic rate and the body size of an organism has been a hot spot in ecological research.

[Rainfall effects on the sap flow of Hedysarum scoparium.].

In arid and semi-arid areas, plant physiological responses to water availability depend largely on the intensity and frequency of rain events. Knowledge on the responses of xerophytic plants to rain events is important for predicting the structure and functioning of dryland ecosystems under changing climate. The sap flow of Hedysarum scoparium in the Mu Us Sand Land was continuously measured during the growing season of 2012 and 2013.

[Genetic diversity and genetic relationships of spacies containing extremely aromatic compounds in leaves of Chimonanthus].

Objective: Species containing extremely aromatic compounds in leaves of Chimonanthus was analyzed to evaluate its genetic diversity and genetic relationships.

Method: AFLP molecular marker technique was used in the study, UPGMA cluster analysis was conducted with the software of POPGENE32.

Results: Five hundred and fifty-nine bands were amplified by 10 pairs of primers screened, of which 226 bands were polymorphic, and the percentage of polymorphic bands was 36.

[Variation of phenolic compound contents of Magnolia officinalis at different levels].

Objective: To reveal the mutative discipline of the contents of the phenols in samples from different provenances.

Method: The contents of magnolol and honokiol in samples from the filial generation of Guanxi, Hubei and Zhejiang provinces were determined respectively by HPLC.

Result: There were significant variations between provenances, the contents of honokiol, magnolol and phenols were the highest in samples from Hubei province, those were the lowest in samples from Zhejiang province.