Evaluation of environmental factors affecting the quality of Codonopsis pilosula based on chromatographic fingerprint and MaxEnt model

2021 ◽  
Vol 170 ◽  
pp. 113783
Author(s):  
Guang-Zhen Wan ◽  
Li Wang ◽  
Ling Jin ◽  
Juan Chen
Keyword(s):  
Environmental Factors ◽  
Chromatographic Fingerprint ◽  
Factors Affecting ◽  
Maxent Model ◽  
Codonopsis Pilosula

THE INFLUENCE OF ENVIRONMENTAL FACTORS ON THE CROP AND QUALITY OF FIBER FLAX

2020 ◽  
Vol 5 (86) ◽  
pp. 3-10
Author(s):  
V.G. Chernikov ◽  
◽  
R.A. Rostovtsev ◽  
N.A. Kudryavtsev ◽  
I.V. Uschapovsky ◽  
...  
Keyword(s):  
Environmental Factors ◽  
Raw Materials ◽  
Great Influence ◽  
Quality Parameters ◽  
Anthropogenic Factors ◽  
Soil Conditions ◽  
Factors Affecting ◽  
Fiber Flax ◽  
Yield And Quality

The formation of fiber flax yield and quality parameters depends on many soil-climatic, breedinggenetic, as well as anthropogenic factors. The quality of flax fiber is a combination of a number of features and properties that depend on the varietal characteristics of plants, the conditions of their cultivation, technologies for harvesting and straw retting, as well as on the processing modes of raw materials. During plant vegetation (90-130 days) many factors such as soil conditions (pH 4.8-5.5, humus 1.8-2.5%, P2O5 and K2O – 150-200 and 100-200 mg/kg, respectively) and the area of plant nutrition (15-30 million seeds/ha), temperature regime (the sum of active temperatures 1000-1800ºC), water supplying (400-430 units of water mass to create 1 unit of dry matter) and insolation (the arrival of FAR during the growing season 20-25 kcal / cm²), contamination of weeds (more than 60 annual and perennial species) and pests (more than 200 types of fungal, bacterial and viral diseases), features of phytosanitary measures (more than 50 chemicals) and agrotechnologic manners (Federal Register of technologies for the production of crop products) have a great influence on the quality of flax raw materials and can be a limit factor. Environmentally hazardous pollution of air, water and soil - the main components for the production of fiber flax – strongly affects the yield and quality of flax products. The development of waste-free environmentally friendly technologies for the cultivation, harvesting and processing of flax is an urgent task of scientific support of the industry. The main environmental factors affecting the yield and quality of fiber flax are discussed in the article.

Multivariate statistical analysis based on a chromatographic fingerprint for the evaluation of important environmental factors that affect the quality of Angelica sinensis

2014 ◽  
Vol 6 (20) ◽  
pp. 8268-8276 ◽  
Author(s):  
Xin-Yue Song ◽  
Ling Jin ◽  
Yan-Ping Shi ◽  
Ying-Dong Li ◽  
Juan Chen
Keyword(s):  
Statistical Analysis ◽  
Environmental Factors ◽  
Multivariate Statistical Analysis ◽  
Angelica Sinensis ◽  
Optimum Level ◽  
Chromatographic Fingerprint ◽  
Multivariate Statistical ◽  
Holistic Strategy

A holistic strategy combining chromatographic fingerprint and multivariable statistical analysis was developed to evaluate the effects of environmental factors on the quality of A. sinensis and choose the optimum level.

scholarly journals Prediction of Potentially Suitable Distributions of Codonopsis pilosula in China Based on an Optimized MaxEnt Model

2021 ◽  
Vol 9 ◽  
Author(s):  
Huyong Yan ◽  
Jiao He ◽  
Xiaochuan Xu ◽  
Xinyu Yao ◽  
Guoyin Wang ◽  
...  
Keyword(s):  
Distribution Area ◽  
Last Interglacial ◽  
Modeling Tools ◽  
Factors Affecting ◽  
Maxent Model ◽  
Codonopsis Pilosula ◽  
Diurnal Range ◽  
Precipitation Seasonality ◽  
Suitable Area ◽  
The Impact

Species distribution models are widely used in conservation biology and invasive biology. MaxEnt models are the most widely used models among the existing modeling tools. In the MaxEnt modeling process, the default parameters are used most often to build the model. However, these models tend to be overfit. Aiming at this problem, this study uses an optimized MaxEnt model to analyze the impact of past, present and future climate on the distributions of Codonopsis pilosula, an economic species, to provide a theoretical basis for its introduction and cultivation. Based on 264 distribution records and eight environmental variables, the potential distribution areas of C. pilosula in the last interglacial, middle Holocene and current periods and 2050 and 2070 were simulated. Combined with the percentage contribution, permutation importance, and jackknife test, the environmental factors affecting the suitable distribution area of this species were discussed. The results show that the parameters of the optimal model are: the regularization multiplier is 1.5, and the feature combination is LQHP (linear, quadratic, hinge, product). The main temperature factors affecting the distribution of C. pilosula are the annual mean temperature, mean diurnal range, and isothermality. The main precipitation factors are the precipitation seasonality, precipitation in the wettest quarter, and precipitation in the driest quarter, among which the annual average temperature contributes the most to the distribution area of this species. With climate warming, the suitable area of C. pilosula exhibits a northward expansion trend. It is estimated that in 2070, the suitable area of this species will expand to its maximum, reaching 2.5108 million square kilometers. The highly suitable areas of C. pilosula are mainly in Sichuan, Gansu, Shaanxi, Shanxi, and Henan Provinces. Our findings can be used to provide theoretical support related to avoiding the blind introduction of C. pilosula.

scholarly journals Environmental Factors Affecting the Mineralization of Crop Residues

Agronomy ◽  
2020 ◽  
Vol 10 (12) ◽  
pp. 1951
Author(s):  
Aleksandra Grzyb ◽  
Agnieszka Wolna-Maruwka ◽  
Alicja Niewiadomska
Keyword(s):  
Environmental Factors ◽  
Crop Production ◽  
Crop Residues ◽  
Management Strategies ◽  
C:N Ratio ◽  
Environment Friendly ◽  
Factors Affecting ◽  
Plant Matter ◽  
High Yields

The aim of this article is to present the issues related to the significance of microorganisms in the mineralization of crop residues and the influence of environmental factors on the rate of this process. Crop residues play a very important role in agriculture because they can be used both as an environment-friendly waste management strategy and as a means of improving soil organic matter. The inclusion of crop residues in the soil requires appropriate management strategies that support crop production and protect the quality of surface water and groundwater. Crops need nutrients for high yields; however, they can only absorb ionic forms of elements. At this point, the microorganisms that convert organically bound nitrogen, phosphorus, and sulfur into soluble NH4+, NO3−, H2PO4−, HPO42−, and SO42− ions are helpful. Mineralization is the transformation of organic compounds into inorganic ones, which is a biological process that depends on temperature, rainfall, soil properties, the chemical composition of crop residues, the structure and composition of microbial communities, and the C:N ratio in soil after the application of plant matter. An adjustment of the values of these factors enables us to determine the rate and direction of the mineralization of crop residues in soil.

scholarly journals HUMAN SPERM COUNT

2015 ◽  
Vol 22 (01) ◽  
pp. 013-017
Author(s):  
Jahangir Sultan ◽  
Kokab Kokab ◽  
Muneer Ahmed
Keyword(s):  
Environmental Factors ◽  
Human Activity ◽  
Semen Quality ◽  
Sperm Quality ◽  
Sperm Count ◽  
Human Sperm ◽  
Factors Affecting ◽  
Parental Exposure ◽  
The World

Objectives: Reports from many parts of the world suggest that chemical andphysical agents in the environment, introduced and spread by human activity may affect fertilityin men. The objective of this article is to highlight the environmental factors and their associationto male sperm quality and count as well. Materials and Methods: This study focusing onexposure to environmental factors affecting the semen quality of the workers working in differentfactories for a period of 5 to 7 years in Lahore. Results: The results from this study suggest thatthere are many environmental factors which may affect semen quality and sperm count. It isnecessary to prevent parental exposure to the agents associated with those hazards.

The quality of sheep milk: a review

1997 ◽  
Vol 37 (4) ◽  
pp. 485 ◽  
Author(s):  
R. Bencini ◽  
G. Pulina
Keyword(s):  
New Zealand ◽  
Environmental Factors ◽  
Dairy Products ◽  
Dairy Production ◽  
High Fat ◽  
High Quality ◽  
Factors Affecting ◽  
Stage Of Lactation ◽  
Sheep Milk

Summary. The quality of sheep milk is paramount in controlling the quality of dairy products made from it. We describe the factors affecting the quality of the milk of sheep milked commercially for dairy production, with an emphasis on Australia and New Zealand. Some of these factors, such as the genotype of the sheep, are difficult to control, but others are environmental factors, such as the nutrition and management of the milking flock, and can be manipulated by the farmer to produce high quality milk. To obtain high quality milk, ewes must be milked out regularly and completely, which implies adopting appropriate milking routines and milking equipment. It is also important that the ewes are healthy and receive adequate diets. Physiologically the ewes must be in an appropriate stage of lactation because at the very beginning and at the end of lactation the milk is of poor manufacturing quality, even though it has high fat and protein content. These factors and their influence on milk quality for the processing of milk into dairy products, especially cheese, are described and critically examined.

scholarly journals Analysis of environmental factors affecting the quality of teacher’s life of public schools from Umuarama

Work ◽  
2012 ◽  
Vol 41 ◽  
pp. 3693-3700
Author(s):  
Bruna Evellyn Costa ◽  
Nicéia Luzia Selete Silva
Keyword(s):  
Public Schools ◽  
Environmental Factors ◽  
Factors Affecting

scholarly journals Factors Affecting the Presence and the Diversity of Bryophytes in the Petrifying Sources Habitat (7220) in Wallonia and the Brussels-Capital Region, Belgium

2016 ◽  
Vol 2016 ◽  
pp. 1-18 ◽  
Author(s):  
J.-M. Couvreur ◽  
G. San Martin ◽  
A. Sotiaux
Keyword(s):  
Species Richness ◽  
Environmental Factors ◽  
Community Composition ◽  
Linear Models ◽  
Canopy Cover ◽  
Individual Species ◽  
Factors Affecting ◽  
The Relationship ◽  
Main Factor

Bryological composition, water chemistry, and environmental factors were characterized on 67 Belgian travertines. We explore the relationship between these environmental factors and the community composition, species richness, or presence of individual species using Redundancy Analysis with Hellinger’s transformation (tb-RDA) or Generalized Linear Models (GLMs). The best variables explaining the community composition are slope, NO3, NH4, and PO4. The species richness is negatively related to canopy cover and PO4.Palustriella commutatatends to be more frequent when the slope is steeper and to a lesser degree when the canopy cover is lower.Eucladium verticillatumtends to be slightly more frequent when canopy cover and NH4concentrations are lower.Cratoneuron filicinumis more frequent at higher Mg concentrations andPellia endiviifoliais more frequent at lower PO4concentrations and higher NO3concentrations.Brachythecium rivulareshowed wide ecological amplitude and almost none of the tested environmental factors seem to be related to its presence. The study identifies eutrophication as the main factor responsible for habitat deterioration. Practical indications on the best ways to maintain or to enhance the quality of these petrifying sources are given.

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