Life Sciences Commons^™

Advances Of Extraction, Purification And Biological Activity Of Flavonoids From Siraitia Grosvenorii, Shao Pei, Zhuang Hu, Jian Shunhua, Chen Sheng

Food and Machinery

The research progress of Siraitia grosvenorii flavonoids in recent years was reviewed, including the structural analysis, extraction and purification and biological activity, providing a theoretical guidance for the application research the flavonoids from S. grosvenorii.

Modeling And Experimental Verification Of Freeze Concentration (And Freeze Desalination) Progress Based On Characterizing The Volumetric Increment Of Materials, Ding Zhongxiang, Qinfrankg F, Yuan Jiaojiao, Jiang Runhua, Huang Simin, Shao Youyuan

Food and Machinery

A mathematical model was established to characterize the freeze concentration process based on the volume increase of materials, which was correlated with the crystallinity of the solution. The relationship between the height of liquid column and the solute concentration was measured on a multi-pass freeze concentrator. The results were compared with the model prediction and were used for model modification and the goodness of fit was high. The crystallization rate error was within 5%.

Reconstruction Of Surface 3d Model Of Brown Rice Based On Point Cloud Data, Wu Jing, Tang Xiaohua, Yang Siping, An Jiaqiang, Li Tianjiao, Yang Jinshan

Food and Machinery

In view of the morphological and structural characteristics of brown rice, use the non-contact laser scanning technology to acquire original point cloud on brown rice surface in the multi-section circular scanning way. The Poisson reconstruction algorithm is used to reconstruct the smoothed point cloud with normal information to obtain the ideal three-dimensional model of brown rice surface. The results show that the reconstructed brown rice model has smooth surface, clear outline, and obvious details such as rice ditch and germ, which can provide an effective digital model for the later improvement of rice processing technology.

Preparation And Characterization Of New High-Potency Dipeptide Sweetener, Mu Xiaoqing, Yan Rian, Tan Qikun, Hu Jing, Zhou Hua

Food and Machinery

N-{N-[3-methyl-3-(3,4-methylenedioxyphenyl) butyl]-α-L-aspartyl}-L-phenylalanine methyl ester is a new sweetener of neotame analogues. In this paper, to synthesize this sweetener, designed the strategy to obtain the key intermediate 3-methyl-3-(3,3- methylenedioxyphenyl) butyraldehyde. Use 3,4-methylenedioxybenzenboronic acid and 3,3-dimethylacrylic acid as starting material through Heck reaction, esterification and DIBAL-H reduction to get the intermediate successfully. Then the target sweetener was synthesized by the reductive amination of 3-methyl-3-(3,4-methylenedioxyphenyl) butyraldehyde with aspartame, which was catalyzed by palladium/carbon under the hydrogen atmosphere. The structure of the final product was identified by NMR, IR and HRMS, and the results matched with the desired sweetener. After being verified by sensory …

Liquor Hop Contour Detection Based On Image Processing, Yang Jingxian, Ren Xiaohong

Food and Machinery

Based on the traditional experience of liquor-receiving according to liquor hop, Computer vision is used instead of human eyes, the video images of liquor-receiving is captured by CCD, and the images of hops with different liquor degrees are preprocessed by histogram equalization and image corrosion to eliminate the influence of high light noise. Then hops contour is compared with different edge detection algorithms. Besides, the combination of OTSU algorithm and Canny edge detection algorithm can better realize the segmentation of hops and background, and clear edge contour is extracted. Through the pattern recognition of Daqing flower and Xiaoqing flower images, …

Effect Of High Temperature Treatment On Beef Fatty Acid And Fat Oxidation, Ke Hairui, Kang Huaibin, Cheng Weiwei, Cai Chaoqi

Food and Machinery

Fresh cattle longissimus dorsi muscle was heated at 110, 115 and 121 ℃ for 5, 10, 15, 20 min respectively. The effects of high temperature on fatty acid composition and fat oxidation in cattle longissimus dorsi muscle were researched by gas chromatography. The results showed that: at 121 ℃, the oxidation rate of intramuscular fat was significantly higher than that at 110 ℃ and 115 ℃ (P<0.05); the content of saturated fatty acid (SFA) increased significantly (P<0.05), and the content of unsaturated fatty acid (UFA) decreased (P<0.05); SFA was not significantly affected by high temperature treatment temperature (110, 115 ℃) (P>0.05), and was significantly affected by treatment time (P<0.05), while heat treatment temperature and time had significant effects on UFA content (P<0.05); the content of short chain and medium chain fatty acids increased due to the fracture and degradation of long chain saturated fatty acids.

Detection Of Pentachlorophenol In Fishery Water Using Surface-Enhanced Raman Spectroscopy, Zhang Luwen, Yu Wansong, Xia Sujie, Chen Yan, Wang Ke

Food and Machinery

A method for rapid determination of pentachlorophenol in fishery water was established by surface-enhanced Raman spectroscopy (SERS). The concentrated gold colloid was prepared to use as Raman substrate according to the classic method, and the optimal SERS enhancement effects were obtained by adjusting the pH of the system, optimizing the coagulants, nanoparticles volume and adsorption time. The method had a good linearity between the peak intensity and the pentachlorophenol concentration in the range of 0.2～4.0 μg/mL, and the detection limit was 0.5 μg/mL. The recovery ranged from 78.74% to 112.30%, and the relative standard deviation was between 6.1%～11.3%. The sensitivity …

Design Of Monitoring System For Soybean Powder Spray Drying Tower Based On Fuzzy Pid, Hou Qiang, Xu Ying, Tian Siqing

Food and Machinery

Based on the characteristics of large delay and strong coupling in spray drying, a monitoring system of spray drying tower for soybean flour based on fuzzy PID is designed. According to the technological requirements, a cascade fuzzy control scheme is adopted for spray drying tower. The main circuit adopts fuzzy PID control, and the secondary loop adopts PI control. The upper and lower computer monitoring adopts Kingview and SIEMENS S7-300 series PLC. The simulation results show that the cascade fuzzy PID control has the advantages of fast speed, small overshoot and strong robustness compared with the conventional PID control.

Variation In Physicochemical Properties And Microbial Diversity During The Progression Of Efflorescence On The Surface Of Douchi, Zhu Minfang, Zhang Lu, Ye Yunhua, Liao Hui

Food and Machinery

The changes in basic physicochemical properties and microbial diversity of Douchi before and after efflorescence of the surface were evaluated. The physicochemical properties were investigated via determining the content of moisture, ash, crude protein, crude fat, total sugar, reducing sugar, total acid, and amino nitrogen, along with the amino acid composition. The microbial diversity was measured by Illumina Miseq sequencing. The results showed that, with the progress of efflorescing, the ash and total sugar content of Douchi exhibited insignificant changes, and the crude fat, reducing sugar and total acid content showed a downward trend as a whole. The moisture content …

Cherry Defect Detection And Recognition Based On Machine Vision, Pei Yuekun, Lian Mingyue, Jiang Yanchao, Ye Jiamin, Han Xinxin, Gu Yu

Food and Machinery

Based on the machine vision technology, convolutional neural network (CNN) was used to detect and recognize, and verified the cherry defects. The results showed that the recognition accuracy of intact cherry was 99.25%, with the average recognition accuracy of defective cherry of 97.99%, and the recognition speed was 25 per second. Compared with other research methods, this method could accurately detect and identify various types of defects.

Purification Of Antioxidant Peptides From The Meat Of Oncomelania Sinensis And Its In Vivo And In Vitro Of Mice Activity, Wu Mingze, Wang Xiao, Hu Xianghao, Ma Qinglin, Li Yanan, Dong Danhua, Gao Peng, Dai Long

Food and Machinery

Ultrafiltration, macroporous resin, gel filtration chromatography and semi preparative liquid chromatography were used to separate and purify the enzymatic hydrolysate of Chinese roundabout meat. DPPH free radical scavenging rate, ABTS radical scavenging rate, iron reduction capacity (FRAP) and oxygen free radical absorbability (ORAC) were used as indicators to prepare antioxidant peptides with high purity and strong antioxidant activity. Enzyme activity and MDA production were measured. The results showed that the antioxidant activity of the enzyme hydrolysate after ultrafiltration was the strongest when the molecular weight was ＜1 kDa. Macroporous resin, gel filtration chromatography and semi preparative liquid chromatography were used …

Effect Of Cold Maceration Treatments On Color Quality And Flavor Characteristics Of Dry Red Wine, Li Binbin, Du Zhancheng, Wu Min, Zhou He, Li Xuewen

Food and Machinery

The effects of cold maceration(CM) temperature and time on the color index and flavor characteristics of dry red wine were investigated with Merlot grape as the test material, and the comprehensive evaluation was carried out by principal component analysis. The results showed that CM could increase the content of phenolic substances in wine, extend the macerating time was beneficial to the accumulation of total pigments, and improve the color and stability of wine. Quantitative description analysis showed that CM temperature and time significantly affected the quality of wine aroma characteristics and taste, the aroma intensity was positively correlated with the …

Effect Of Ultrasonic And Blanching Pretreatment On Hot Air Drying Of Sweet Potato Leaves, Zhang Yingmin, Ren Guangyue, Qu Zhanping, Jin Liwei, Duan Xu, Zhang Ledao

Food and Machinery

In order to optimize the hot air drying process of fresh sweet potato leaves and improve its drying quality, the pretreatment of sweet potato leaves before hot air drying was carried out by ultrasonic and blanching, and different ultrasonic power, temperature, time and proportion of blanching liquid, temperature. The effect of time on chlorophyll, rehydration, chromatic aberration, drying characteristics, energy consumption and microstructure of sweet potato leaves after hot air. The experimental results showed that the optimal ultrasonic conditions are: time 10 min, power 300 W, temperature 40 ℃, the ultrasonic pretreatment of sweet potato leaves has a higher drying …

Research Progress On Processing Technology Of Low-Salt Meat Products, Yu Tao, Xu Qian, Niu Xiyue, Yu Jing, Yin Yanling, Lu Ye

Food and Machinery

This article described the current status of low-salt meat processing technology at home and abroad in recent years, and discussed the research progress of low-salt processing of meat products from three aspects: necessity, route and process of salt reduction processing. Some suggestions was given for the problems arisen in the studies, and the technology had been prospected in the future research progress.

Pi‑Plat: A High‑Resolution Image‑Based 3d Reconstruction Method To Estimate Growth Dynamics Of Rice Inflorescence Traits, Jaspreet Sandhu, Feiyu Zhu, Puneet Paul, Tian Gao, Balpreet K. Dhatt, Yufeng Ge, Paul E. Staswick, Hongfeng Yu, Harkamal Walia

Department of Agronomy and Horticulture: Faculty Publications

Background: Recent advances in image-based plant phenotyping have improved our capability to study vegetative stage growth dynamics. However, more complex agronomic traits such as inflorescence architecture (IA), which predominantly contributes to grain crop yield are more challenging to quantify and hence are relatively less explored. Previous efforts to estimate inflorescence-related traits using image-based phenotyping have been limited to destructive end-point measurements. Development of non-destructive inflorescence phenotyping platforms could accelerate the discovery of the phenotypic variation with respect to inflorescence dynamics and mapping of the underlying genes regulating critical yield components.

Results: The major objective of this study is to evaluate …

The Intersection Of Deforestation And Economic Growth In The Brazilian Amazon, Victoria Oceguera

Student Theses 2015-Present

Abstract

As a result of capital gain, deforestation of the Amazon in Brazil continues. Brazilian government's insufficient efforts to mitigate and enforce the preservation of these precious forests has ledto the commodification of the Amazon. Chapter 1 uses historical and quantitative data to examine the negative impacts of deforestation on indigenous communities and climate change. Chapter2 employs economics to analyze the role of business as a crucial component of deforestation in Brazil. Chapter 3 engages politics in Brazil to discuss interactions between key actors involved in the perpetuation of deforestation. Chapter 3 examines the interactions between politics and corruption involved …

Snowpack Properties Vary In Response To Burn Severity Gradients In Montane Forests, Jordan Maxwell, Samuel B. St. Clair

Aspen Bibliography

Wildfires are altering ecosystems globally as they change in frequency, size, and severity. As wildfires change vegetation structure, they also alter moisture inputs and energy fluxes which influence snowpack and hydrology. In unburned forests, snow has been shown to accumulate more in small clearings or in stands with low to moderate forest densities. Here we investigate whether peak snowpack varies with burn severity or percent overstory tree mortality post-fire in a mid-latitude, subalpine forest. We found that peak snowpack across the burn severity gradients increased 15% in snow-water equivalence (SWE) and 17% in depth for every 20% increase in overstory …

The Potential For Dickeya Dianthicola To Be Vectored By Two Common Insect Pests Of Potatoes, Jonas K. Insinga

Electronic Theses and Dissertations

Dickeya dianthicola (Samson) causing blackleg and soft rot was first detected in potatoes grown in Maine in 2014. Previous work has suggested that insects, particularly aphids, may be able to vector bacteria in this genus between plants, but no conclusive work has been done to confirm this theory. In order to determine whether insect-mediated transmission is likely to occur in potato fields, two model potato pests common in Maine were used: the Colorado potato beetle (Leptinotarsa decimlineata Say) and the green peach aphids (Myzus persicae Sulzer). Olfactometry and recruitment experiments evaluated if either insect discriminates between infected and …

Green Strategic Planning Approach For International Shipping Activities, Xiaofang Wu, Luoping Zhang, Huan Feng

Department of Earth and Environmental Studies Faculty Scholarship and Creative Works

Sustainability is a long-term and ultimate goal for international shipping, although it is slowly making progress. The shipping perspective that moves away from “port-to-port” operations to “door-to-door” services also requires international shipping to take a long-term and holistic view instead of fragmented efforts. How to achieve the long-term sustainability goal becomes a key issue for door-to-door international shipping. Hence, green strategic planning for door-to-door international shipping was proposed with green development that puts forward the eco-centric point of view as its basic theory for sustainability. This study used a strategic decision-making approach, a so-called multi-dimensional decision-making (MDDM), coupled with the …

Divergent Phenotypic Response Of Rice Accessions To Transient Heat Stress During Early Seed Development, Puneet Paul, Balpreet K. Dhatt, Jaspreet Sandhu, Waseem Hussain, Larissa Irvin, Gota Morota, Paul E. Staswick, Harkamal Walia

Department of Agronomy and Horticulture: Faculty Publications

Increasing global surface temperatures is posing a major food security challenge. Part of the solution to address this problem is to improve crop heat resilience, especially during grain development, along with agronomic decisions such as shift in planting time and increasing crop diversification. Rice is a major food crop consumed by more than 3 billion people. For rice, thermal sensitivity of reproductive development and grain filling is well-documented, while knowledge concerning the impact of heat stress (HS) on early seed development is limited. Here, we aim to study the phenotypic variation in a set of diverse rice accessions for elucidating …

Management Controls The Net Greenhouse Gas Outcomes Of Growing Bioenergy Feedstocks On Marginally Productive Croplands, Virginia L. Jin, Marty Schmer, Catherine E. Stewart, Robert B. Mitchell, Candiss O. Williams, Brian J. Wienhold, Gary Varvel, Ronald F. Follett, John Kimble, Kenneth P. Vogel

United States Department of Agriculture-Agricultural Research Service / University of Nebraska-Lincoln: Faculty Publications

Bio-based energy is key to developing a globally sustainable low-carbon economy. Lignocellulosic feedstock production on marginally productive croplands is expected to provide substantial climate mitigation benefits, but long-term field research comparing greenhouse gas (GHG) outcomes during the production of annual versus perennial crop-based feedstocks is lacking. Here, we show that long-term (16 years) switchgrass (Panicum virgatum L.) systems mitigate GHG emissions during the feedstock production phase compared to GHG-neutral continuous corn (Zea mays L.) under conservation management on marginally productive cropland. Increased soil organic carbon was the major GHG sink in all feedstock systems, but net agronomic GHG outcomes …

Representative Economic Budgets For Nebraska Cow Herds, Glennis Mcclure, Jay Parsons

Cornhusker Economics

In 2017, the University of Nebraska-Lincoln Institute of Agricultural and Natural Resources (IANR) and Nebraska Extension made a commitment to implement a multidisciplinary Beef Systems Initiative (BSI). BSI is administered by the Center for Grassland Studies and is comprised of six projects designed to develop and support implementation of beef production systems that optimize feed resource use, natural resource conservation, and producer success in Nebraska through improved management of perennial grasslands and systems of integrated crop-beef cattle production. In addition to BSI, a parallel project funded by the Foundation for Food and Agriculture Research (FFAR) is studying the best practices …

Phylogenetic And Genomic Characterization Of The Host-Pathogen Arms Race Between Bacterial Pathogens And Gossypium Hirsutum, Anne Zimmerman Phillips

Arts & Sciences Electronic Theses and Dissertations

Hosts and pathogens are eternally intertwined in an evolutionary arms race. When a pathogen causes a disease outbreak, scientists must identify resistance strategies that can durably tilt the arms race in favor of the host. This requires a deep understanding of both the genetic and environmental contexts in which the outbreak occurs. In this thesis I investigate the bacterial pathogens Xanthomonas citri pv. malvacearum (Xcm) and Pseudomonas syringae that caused disease outbreaks on Gossypium hirsutum from 2011-2017. I use pathogen genomics and host transcriptomics to develop hypotheses for how these pathogens emerged and how they cause disease. Phylogenetics and virulence …

Vintage Report 2019: North Willamette Valley, Gregory V. Jones

Linfield University Wine Studies Reports

This report describes the impacts of climate and phenology on vintage for the North Willamette Valley in Oregon in 2019. A relatively mild early winter in 2018 was followed by a cold and wet second half of winter in 2019 and then a wet, but warm, spring. The growing season saw a few mild frosts during late April, but started off warmer than average, moderating through mid-vintage with fewer than average heat spikes. Near-record precipitation amounts during late June and early July brought increased disease pressure to the region. The vintage will be remembered for the early rains in September …

Feeding The Future Meat Doesn’T Come Cheap, Lukas C. Southard

Capstones

Cultured – or as it is referred to by companies innovating the technology clean – meat is expected to be the next innovation to change the way the world gets its animal protein. Meat from animal cells grown in a lab seems like science fiction but it is around the corner from hitting your supermarket shelves. The technology has been developed but how these companies intend on scaling up their production to meet retail demands remains a mystery. So far companies have relied on seed and early stage investment from venture capital companies and private sources to fund research. Predictions …

Compositional Characterization Of Different Industrial White And Red Grape Pomaces In Virginia And The Potential Valorization Of The Major Components, Qing Jin, Joshua O'Hair, Amanda C. Stewart, Sean F. O'Keefe, Andrew P. Neilson, Young-Teck Kim, Megan Mcguire, Andrew Lee, Geoffrey Wilder, Haibo Huang

Biology Faculty Research

To better evaluate potential uses for grape pomace (GP) waste, a comprehensive chemical composition analysis of GP in Virginia was conducted. Eight commercial white and red pomace samples (cv. Viognier, Vidal Blanc, Niagara, Petit Manseng, Petit Verdot, Merlot, Cabernet Franc, and Chambourcin) obtained from different wineries in Virginia, USA were used. For extractives, GPs contained 2.89%–4.66% titratable acids, 4.32%–6.60% ash, 4.62%–12.5% lipids with linoleic acid being the predominant (59.0%–70.9%) fatty acid, 10.4–64.8 g total phenolic content (gallic acid equivalents)/kg GP, 2.09–53.3 g glucose/kg GP, 3.79–52.9 g fructose/kg GP, and trace sucrose. As for non-extractives, GPs contained 25.2%–44.5% lignin, 8.04%–12.7% glucan, …

Accrual Accounting And The Farm Business, Part Ii, Tim L. Meyers

Cornhusker Economics

My last Cornhusker Economics article, Accounting Assumptions and the Farm Business (10-16-19) set the foundation for a specific evaluation of the conceptual framework accrual accounting offers the farm or ranch manager. The article addressed cash accounting and hinted at its shortfalls which were rectified by accrual accounting. This article will explain conceptual frameworks, and two accrual accounting principles; namely the revenue recognition principle and the matching principle.

During one of my graduate school experiences, I encountered a professor who seemed to be in love with conceptual frameworks. I chose a framework and tried to use it as instructed, but it …

Maharrey, Cynthia Saddler, B. 1969 (Fa 1359), Manuscripts & Folklife Archives

FA Finding Aids

Finding aid only for Folklife Archives Project 1359. Student folk studies project titled “The Intersection of Yesteryear Farming and the Eco/Org Healthy Food Movement” which includes an interview with Jerald Anderson “Jerry” Hicks by Cynthia Saddler Maharrey about farming in Fleming County, Kentucky. Project includes an audio interview, PowerPoint presentation, and color photographs related to Hicks and his farm. The interview is archived in the WKU Sound Archives.

What Regional Economic Factors Drive Feedstock Cost For Cannabinoid Hemp Processors In The United States?, Tanner Mccarty

Journal of Agricultural Hemp Research

This study measures the importance of various regional economic and agronomic factors on a grower’s decision to cultivate cannabinoid (CBD) hemp flower in the United States, and its subsequent effect on CBD processor feedstock cost. I use real options analysis to recover the price of hemp flower required to trigger land use change from commodity crop production to hemp flower production across various scenarios endemic to different hemp producing regions. Results suggest the most important factors in determining the price required to trigger CBD floral hemp production are the expected yield of floral hemp and CBD concentrations within it. CBD …

Deep Kernel And Deep Learning For Genome-Based Prediction Of Single Traits In Multienvironment Breeding Trials, José Crossa, Johannes W.R. Martini, Daniel Gianola, Paulino Pérez-Rodríguez, Diego Jarquin, Philomin Juliana, Osval Antonio Montesinos López, Jaime Cuevas

Department of Agronomy and Horticulture: Faculty Publications

Deep learning (DL) is a promising method for genomic-enabled prediction. However, the implementation of DL is difficult because many hyperparameters (number of hidden layers, number of neurons, learning rate, number of epochs, batch size, etc.) need to be tuned. For this reason, deep kernel methods, which only require defining the number of layers, may be an attractive alternative. Deep kernel methods emulate DL models with a large number of neurons, but are defined by relatively easily computed covariance matrices. In this research, we compared the genome-based prediction of DL to a deep kernel (arc-cosine kernel, AK), to the commonly used …