Publications

Quantifying the Impacts of Climate Change and Human Activities on Runoff in the Upper Yongding River Basin

Fast Ground Segmentation Method Based on Lidar Point Cloud

Abstract A ground segmentation method based on line fitting of adjacent points was proposed for accurate and real-time segmentation of non-ground information from the LiDAR point cloud. Firstly, the point cloud is divided into several ordered regions depending upon the distribution characteristics of the LiDAR’s concentric circles. Then, the Euclidean distance between adjacent points and the spatial geometric features of ground point clouds is used for adaptive line fitting of ground point clouds. Finally, the ground points are divided by the distance between the adjacent points and the outer points of the line. The experiment was conducted using a real car and the KITTI open-source dataset. The approach presented in this research substantially enhances the accuracy of ground segmentation while ensuring real-time performance.

Partial substitution of wheat flour with kiwi starch: Rheology, microstructure changes in dough and the quality properties of bread

Kiwi starch (KS) is a new fruit-derived starch-based food material. In this study, wheat flour was partially replaced with 10–20% KS to make bread, and the influence of this substitution on mixed flour, dough processing performance, bread quality, and shelf life was investigated. KS substitution improved the water-binding ability of mixed flour, making it easier to gelatinize while improving viscoelasticity but reducing the integrity of the dough's gluten network structure. As the substitution rate increases, the hardness, air-cell ratio, and width-to-height ratio of bread significantly increased, while the springiness, resilience, baking loss, and specific volume reduced significantly (p < 0.05). KS enriched the bread's color and flavor by promoting the Maillard reaction during baking. Overall acceptability of 10% KS group was highest in sensory evaluation. KS substitution significantly reduced starch digestibility and expected glycemic index (GI), inhibited mold growth and reproduction during storage and prolonged the shelf life of the bread at 25 °C.

Comprehensive evaluation of the effect of five sterilization methods on the quality of black carrot juice based on PCA, TOPSIS and GRA models

The effect of thermal pasteurization (TP), high temperature long time (HTLT), ultra-high temperature instantaneous (UHT), high hydrostatic pressure (HHP) and thermosonication (TS) sterilization on the physicochemical, sensory and functional properties of black carrot juice (BCJ) were studied. And for the first time, the comprehensive quality of sterilized BCJ was quantified by mathematical modeling. UHT was the least suitable sterilization method for BCJ resulting from the most severe deterioration in functional properties. TS had adverse effects on sensory and physicochemical properties, but significantly increased the total flavonoids and anthocyanins contents (p < 0.05) and showed the strongest antioxidant activity, making it a nutritional high-value processing method. TP and HHP balanced the improvement of sensory properties and the retention of functional properties, which were the most suitable sterilization methods for BCJ. This study determined the optimal sterilization methods of BCJ, and provided a scientific solution for the screening of high quality processing methods.

Porous NiCo2O4@Ppy core-shell nanowire arrays covered on carbon cloth for flexible all-solid-state hybrid supercapacitors

Advances in application of sensors for determination of phthalate esters

Nickel-cobalt-molybdenum sulfides with adjustable morphology via coprecipitation and hydrothermal conversion as high-performance electrodes for asymmetric supercapacitors

Intelligent Sensory Technology Combined with Metabolomics Revealed The Evolution Law of Sensory Quality and Metabolites During Post-Ripening of ‘Cuixiang’ Kiwifruit

Analysis of the Flavor Code of Newly Cultivated Excellent Apple Varieties in China Using the Sensomics

"Rui Yang", "Rui Xue", and "Rui Xiang Hong" are newly cultivated apple varieties with excellent flavor. However, the key aroma-active compounds responsible for its excellent flavor quality were unclear. This study determined the characteristics of aroma compounds among three new apple varieties and their parental species by Sensomics. A total of 150 aroma compounds were detected by GC × GC-QTOFMS. Gas chromatography-olfactometry and odor activity values indicated that 23 aroma-active compounds were the major aroma contributors in different apple varieties. Principal component analysis and orthogonal partial least-squares-discriminant analysis results showed significant differences in aroma compounds between the new apple varieties and their parents, and hexanol, hexanal, (E)-2-hexenal, 2-methylbutyl acetate, hexyl acetate, and ethyl butyrate were identified as differential aroma compounds. The apple aroma recombination model could well restore the real aroma characteristics, which confirmed the accuracy of the identification and quantification of the aroma-active compounds. Omission experiments verified that ethyl butyrate, isopropyl butyrate, 2-methylbutyl acetate, hexyl acetate, linalool, hexanal, (E)-2-hexenal, (E,E)-2,4-nonadienal, 1-octen-3-one, β-damascenone, and geranylacetone were the key aroma-active compounds in the three apple varieties. This provides valuable information about aroma compounds for the cultivation of excellent apples.

Plant-derived melatonin from food: a gift of nature

The Chinese fairy tale of Shennong, the god of agriculture in China, who tasted hundreds of grasses to find foods and herbs for humans during the legend period.

Effect of partial substitution of wheat flour with kiwi starch on dough rheology, microstructure, the quality attributes and shelf life of Chinese steamed bread

iTRAQ-based quantitative proteomic analysis of differentially expressed proteins in<i>Litopenaeus vannamei</i>in response to infection with WSSV strains varying in virulence

The isobaric tags for relative and absolute quantitation (iTRAQ) were applied to identify differentially expressed proteins (DEPs) in Litopenaeus vannamei in response to different virulence white spot syndrome virus infection. A total of 2780 unique peptides corresponding to 754 proteins were identified. The number of significant differentially expressed proteins was 161, including 38 up‐regulated ones and 123 down‐regulated ones in low‐virulence infection library compared with normal‐virulence infection library. Gene Ontology function annotation indicated that the differentially expressed proteins mainly participated in the biological process. Subcellular location classification showed that the largest distribution of differentially expressed proteins was found in the cytoplasm in both down‐regulated and up‐regulated proteins. Kyoto encyclopaedia of genes and genomes analysis revealed that most of the differentially expressed proteins were involved in carbon metabolism. Moreover, three metabolic pathways, including carbon metabolism, inositol phosphate metabolism, and fructose and mannose metabolism, were significantly affected. Our findings offered a better understanding of the host response to different virulence white spot syndrome virus infection. Significance and Impact of the Study: White spot syndrome virus (WSSV) is one of the most harmful pathogens in shrimp farming. Previous studies have shown that genetic variations of white spot syndrome virus cause the strains of different virulence. The hosts also show different self‐regulation when infected by different viruses. A better understanding of host response to white spot syndrome virus will help elucidate the virulence and pathogenesis of this unique pathogen.

A new source of starchy flour: Physicochemical and nutritional properties of starchy kiwifruit flour

Abstract 5844: A comprehensive pan-cancer analysis of MDM2/MDM4 gene amplification in Chinese solid cancer patients

Abstract Background: Many patients with cancer have benefited from immunotherapy represented by the blockade of immune checkpoint PD-1/PD-L1. However, about 4-29% of cancer patients treated with immunotherapy developed hyper-progressive diseases(HPD) with accelerated tumor growth. MDM2/MDM4 amplification was suggested as genomic correlates for elevated risk hyperprogression. The objective of this study was to evaluate the frequency of amplification of MDM2/MDM4 in the Chinese solid tumor patients and to provide advice on the selecting of optimal treatment decisions. Methods: Tumor or blood samples were collected from 2,937 patients with solid cancer, genetic mutations and amplification was detected using the next-generation sequencing(NGS). Results: A total 112 patients with MDM2/MDM4 amplification were identified, including lung cancer 50.9% (57/112), colorectal cancer 14.3% (16/112), gastric cancer 8.0% (9/112), liver cancer 5.4% (6/112), Biliary tract cancers 4.5% (5/112), breast cancer 2.7% (3/112), and pancreatic ductal adenocarcinoma 2.7% (3/112). TMB value was identified, The median TMB for lung cancer was 9.13 mutations/Mb, median TMB for colorectal cancer was 13.8 mutations/Mb, a high TMB value in gastric cancer (median TMB=20.22 mutations/Mb), and median TMB for liver cancer was 17.9 mutations/Mb. Meanwhile, MSI was detected in 8% of patients with MDM2/MDM4 amplification, of which 3 in lung cancer, 5 in colorectal cancer, and 1in gastric cancer. Conclusions: Although amplification of MDM2/MDM4 was observed only in a small proportion of patients, it demonstrated an association with high TMB in several common cancer types. In addition, our data indicate that amplification of MDM2/MDM4 in different types of cancer is heterogeneous and that an appropriate immunotherapy strategy for patients with solid cancer should be noted. Citation Format: xiangyu sun, Zhichao Fu. A comprehensive pan-cancer analysis of MDM2/MDM4 gene amplification in Chinese solid cancer patients [abstract]. In: Proceedings of the American Association for Cancer Research Annual Meeting 2022; 2022 Apr 8-13. Philadelphia (PA): AACR; Cancer Res 2022;82(12_Suppl):Abstract nr 5844.

Using abandoned unripe grape resources to solve the low-acid problem in the northwest wine region of China

Low acid is the main defect in the northwest wine region of China in recent years. The fermentation of unripe grape (UG) and wine grapes with low acid contents was carried out. Compared with control group (CK), the addition of UG addressed the core flaw that low acid grape bring to wine firstly, it significantly increased titratable acid, tartaric acid and malic acid while significantly decreasing alcohol and volatile acids in wine. Secondly, UG significantly improved wine color, the color parameters a*, b*, C* and L* were significantly increased to different degrees. At the same time, the addition of UG significantly improves other qualities of wine, including the phenolic substances and antioxidant capacity of wine. In addition, adding UGJ2% significantly improved the sensory quality, and pleasant volatile substances such as phenethyl alcohol, ethyl hexanoate, ethyl butyrate and isoamyl acetate were significantly increased, giving the wine more prominent floral and fruity aromas.

Highly Reactive Biomass Waste Humins Derived from Photocatalytic Polymerization of 5-Hydroxymethylfurfural for Self-Healing Polymers

In this article, the photocatalytic polymerization of 5-hydroxymethylfurfural (HMF) was applied in the preparation of photo-generated humins (L-H) for the first time. The molecular weight and furan ring content of L-H would be increased by introducing HMF into low-molecular-weight humins (LMW-H) extracted from spoiled HMF under visible light. Compared with humins prepared by the thermal-acid method (A-H), the molecular weight of L-H was less than 800 g/mol; therefore, L-H exhibited great solubility in various solvents and high chemical reactivity for structure modification. Also, the structure units had great differences between L-H and A-H. A-H only consisted of 2,5-dioxo-6-hydroxyhexanal (DHH) and HMF, while L-H also included the 5-hydroxy-4-keto-pentenoic acid (HKPA) generated by reacting HMF with singlet-oxygen. Then, the furan-based polymers were obtained through the classic Diels–Alder (DA) reaction to realize resource utilization of L-H. HKPA units in L-H provided more reaction sites for DA reaction. Characterizations by nuclear magnetic resonance (NMR), Fourier transform infrared (FTIR) spectrum, microscopy, differential scanning calorimetry (DSC), and tensile properties proved that the polymer DA-L-H containing D–A bonds had self-healing properties, and the recovery efficiency could reach 92.8%. Through the utilization of biomass waste humins, the recycling of resources and sustainable economic development could be realized.

Effect of high Cu2+ stress on fermentation performance and copper biosorption of Saccharomyces cerevisiae during wine fermentation

Abstract The effect of high Cu2+ stress on fermentation performance and copper biosorption of Saccharomyces cerevisiae BH8 during wine fermentation was investigated in this paper. Under high Cu2+ stress, the cell growth and survival rate of yeast BH8 were inhibited. With different copper concentration, the effect on cell growth of yeast BH8 was different. What’s more, high Cu2+ stress could inhibit the fermentation property, alcohol production and reducing sugar utilization of yeast BH8 in Chardonnay grape must, but not significant. And the trend of the copper ion concentration falling down was consistent with the trend of yeast growth rising up, meanwhile the copper content was still much less than the initial concentration after fermentation. In addition, yeast BH8 showed a good fermenting property and copper removal ability under high Cu2+ stress. These results could provide certain reference and some new data for the wine industry to face the copper pollution risk.

Similarity Graph Convolutional Construction Network for Interactive Action Recognition