scholarly journals Effect of Drying Methods and Packaging on the Nutritional Values of Onions (Allium cepa L.) Bulbs

2020 ◽  
pp. 47-55
Author(s):  
Elizabeth Toyin Afolabi ◽  
Vadlya Tizhe Tame
Keyword(s):  
Allium Cepa ◽  
Research Work ◽  
The Other ◽  
Drying Methods ◽  
Plastic Container ◽  
Physiochemical Properties ◽  
Oven Drying ◽  
Sun Drying ◽  
Onion Bulbs ◽  
Other Hand

This research work was designed to give an insight on physiochemical properties of Allium cepa. The purpose of this study was to determine the effects of three drying methods on the physiochemical properties of onion bulbs and to determine the effective packaging material on the physiochemical properties of onion. Freshly harvested onion bulbs at a fully matured stage and fully ripe was purchased from a commercial farm at Locco farms from Song LGA of Adamawa State, Nigeria. The experiment consists of six treatments which include oven drying plastic container, oven drying polythene bags, sun drying plastic container, sun drying polythene bags, shade drying plastic container and shade drying polythene bags. The experiment was replicated three (3) times and data was collected on parameters such as color, bulk density, fat, carbohydrate and, fiber. The various drying methods used were capable of preserving the nutrients in A. Cepa without total loss of any nutrient. Shade dried and oven dried samples were found to be more nutritive, on the other hand, oven drying and sun drying were faster in drying than the shade drying method. Oven drying was more cost effective and gave the lowest moisture content in this study, suggesting higher capacity to prevent microbial growth and decay in the dried samples, thus confers a greater increase in shelf-life on the dried samples. On the other hand, plastic container packaging was found to be better in terms of maintaining physical and chemical properties of the dried samples followed, by polythene bags. Further study should be carried out on the factors that affect the storability of onion bulbs in both dried and fresh samples.

Response to Jean-Pierre Chretien

1990 ◽  
Vol 19 (1) ◽  
pp. 41-41
Author(s):  
René Lemarchand
Keyword(s):  
Research Work ◽  
The Other ◽  
Other Hand ◽  
Excellent Work ◽  
The One

My apologies to Mr. Chrétien and to your readers for “developing some simplistic formulas on Burundi” in my quest for “media success.” No such simplistic formulas enter his criticism of my Congressional testimony. On the one hand, I am taken to task for not conceding that my interpretation of the Hutu-Tutsi conflict as a recent phenomenon is the product of Chrétien’s “patient research work” over the last quarter of a century; on the other hand, “some very similar analysis” had appeared in my “excellent work of 1970,” which came out long before Mr. Chrétien embarked on his patient research! Try to figure that one out if you can.

scholarly journals Stock Price Prediction Using Deep Learning Models

2021 ◽  
Author(s):  
Jaydip Sen ◽  
Sidra Mehtab ◽  
Gourab Nath
Keyword(s):  
Deep Learning ◽  
Stock Prices ◽  
Stock Price ◽  
Regression Models ◽  
Research Work ◽  
The Other ◽  
Learning Models ◽  
Stock Price Prediction ◽  
Price Prediction ◽  
Other Hand

Prediction of future movement of stock prices has been a subject matter of many research work. On one hand, we have proponents of the Efficient Market Hypothesis who claim that stock prices cannot be predicted, on the other hand, there are propositions illustrating that, if appropriately modeled, stock prices can be predicted with a high level of accuracy. There is also a gamut of literature on technical analysis of stock prices where the objective is to identify patterns in stock price movements and profit from it. In this work, we propose a hybrid approach for stock price prediction using five deep learning-based regression models. We select the NIFTY 50 index values of the National Stock Exchange (NSE) of India, over a period of December 29, 2014 to July 31, 2020. Based on the NIFTY data during December 29, 2014 to December 28, 2018, we build two regression models using <i>convolutional neural networks</i> (CNNs), and three regression models using <i>long-and-short-term memory</i> (LSTM) networks for predicting the <i>open</i> values of the NIFTY 50 index records for the period December 31, 2018 to July 31, 2020. We adopted a multi-step prediction technique with <i>walk-forward validation</i>. The parameters of the five deep learning models are optimized using the grid-search technique so that the validation losses of the models stabilize with an increasing number of epochs in the model training, and the training and validation accuracies converge. Extensive results are presented on various metrics for all the proposed regression models. The results indicate that while both CNN and LSTM-based regression models are very accurate in forecasting the NIFTY 50 <i>open</i> values, the CNN model that previous one week’s data as the input is the fastest in its execution. On the other hand, the encoder-decoder convolutional LSTM model uses the previous two weeks’ data as the input is found to be the most accurate in its forecasting results.

Effect of drying methods on the nutritional content and In- vitro Antioxidant capacity of Chenopodium album L. and Spinacia oleracea L.

2021 ◽  
pp. 4361-4366
Author(s):  
Sonia Singh ◽  
Neetu Agrawal
Keyword(s):  
Spinacia Oleracea ◽  
Chenopodium Album ◽  
Microwave Drying ◽  
Total Phenolic ◽  
Drying Methods ◽  
Drying Method ◽  
Nutrient Quality ◽  
Oven Drying ◽  
Sun Drying ◽  
Hot Air

The herbs, Chenopodium album Linn. and Spinacia oleracea Linn. belongs to Chenopodiaceae family, are the two nutritious and edible green leafy food crops, abundantly found especially in the northern-west region of India. These plants have gained renown popularity, because of their high nutritional content including protein, amino acids, carbohydrate, and even the presence of phenolic components, which ultimately may get affected with drying and storage techniques. Impact of different drying methods (microwave drying at 4 minutes, hot air oven drying at 5 hours and sun drying at 8-10 hours) on nutrient quality and antioxidant property of Chenopodium album Linn. and Spinacia oleracea Linn. leaves were evaluated by using UV spectrophotometritc assay, total phenolic content and DPPH free radical scavenger method. Drying treatments were significantly decreased the moisture, carbohydrate and protein content present in C.album and S. oleracea. Hot air oven drying method produced dried samples of C.album and S. oleracea had significantly similar antioxidant activity when compared with the samples obtained from sun drying method. The dried samples obtained from hot air oven drying technique showed significant presence of total phenolic content in C. album and S. oleracea (6.44±0.12 mg/g, 6.69±0.40 mg/g) whilst the traditional sun drying method produced 8.00±0.02 mg/g and 7.89±0.37 mg/g). It is concluded that microwave drying and hot air oven drying were the methods to preserve appreciable percentage of nutrient components compared to the fresh samples. On other hand, the traditional method produced substantial reduction of nutrient quality. From statistical analysis, hot air oven drying technique was considered as optimum method which showed satisfactory % retention of protein (65.86%) and carbohydrate (85.95%) at 5 hours (shorter time than sun drying time period) along with significant antioxidant activity (34.89 μg/mL and 35.60 μg/mL) similar as obtained from the traditional technique (32.00 μg/mL).

scholarly journals Pengaruh Dua Metode Pengeringan Pada Aktivitas Antibakteri Ashitaba (Angelica keiskei ) Terhadap Streptococcus mutans

2018 ◽  
Vol 4 (1) ◽  
pp. 18-25
Author(s):  
Dyke Gita Wirasisya ◽  
Yohanes Juliantoni ◽  
Wahida Hajrin
Keyword(s):  
Antibacterial Activity ◽  
Streptococcus Mutans ◽  
Total Phenolic Content ◽  
Phenolic Content ◽  
Total Phenolic ◽  
Drying Methods ◽  
Drying Method ◽  
Oven Drying ◽  
Sun Drying ◽  
Angelica Keiskei

The aim of this study was to determine a change that occurs in total phenolic content (TPC) and antibacterial activity of ashitaba (Angelica keiskei) after dried using two different methods : sun and oven drying. The effectiveness of the drying methods was evaluated in term of total phenolic content (TPC) by using spectrophotometric assay with Folin-Ciocalteu reagent and antibacterial activity againts Streptococcus mutans by in vitro macrodilution assay. Oven drying at 60oC possessed high TPC (2,98 ± 0,0935 g EAG/100g) compared to sun drying method (1,72 ± 0,0142 g EAG/100g). Simillar pattern was also observed in antibacterial activity. Oven drying have higher antibacterial activity with the MBC (minimal bactericidal concentration) value of 0,5 mg/mL againts Streptococcus mutans. Therefore, sun drying is not suggested for drying method of ashitaba in terms of total phenolic content and antibacterial activity compared with oven drying methods.

scholarly journals Effects of different drying methods and packaging materials on the physical and sensory qualities of tomato (Lycopersicon lycopersicum L.)

2022 ◽  
Vol 10 (1) ◽  
pp. 26-30
Author(s):  
A Ahmad ◽  
D. T Gungula ◽  
V.T Tame ◽  
J Kapsiya ◽  
J.O. Ilesanmi ◽  
...  
Keyword(s):  
Absorption Capacity ◽  
Drying Methods ◽  
Packaging Materials ◽  
Drying Method ◽  
Plastic Container ◽  
Tomato Fruits ◽  
Oven Drying ◽  
Randomized Design ◽  
Sensory Qualities ◽  
Sun And Shade

Fresh tomato fruits have a very limited shelf life partly due to their high moisture content and respiration rate. A possible way of storing tomato fruits is to dry and process them into powder or paste. Therefore, this research was conducted to determine the effects of drying methods and packaging materials on physical and sensory qualities of powdered tomato in Yola, Adamawa State, Nigeria. Harvested fruits of tomato variety, “Rio de grande” were subjected to blanching and subsequent drying methods and packaging materials. The experiment was laid out in a Completely Randomized Design (CRD); with the drying methods placed in main plot while the packaging materials in sub-plot and repeated three times before storage for twelve weeks. At four weeks of storage, oven drying method was found to be statistically different (p≤0.05) in terms of water absorption capacity value of 3.19 (mg/100g). The glass jars performed better than polythene bags in color retention, taste and consistency at four weeks of storage. The study shows that tomato fruits can be successfully dried using oven, sun and shade drying methods but preferably oven drying method. The processed powder could be successfully stored for 12 weeks or above using either glass jars or plastic container without affecting the consumer appeal and this will also reduce the postharvest losses of tomato fruits.

An evaluation of physiochemical properties on aloevera gel fortified yoghurt

2017 ◽  
Author(s):  
D. Govindammal ◽  
M. Seethalakshmi ◽  
S. Thangaraj
Keyword(s):  
Vitamin C ◽  
Sensory Evaluation ◽  
Control Sample ◽  
Titratable Acidity ◽  
The Other ◽  
Physiochemical Properties ◽  
Other Hand

The present study was conducted to evaluate the effect of physicochemical and phytonutients qualities of aloevera gel fortified yoghurt. Three different concentration of yoghurt were developed with 10, 15 and 20 percent of aloevera gel addition. Based on sensory evaluation,the sample AY2 has scored higher in the overall acceptance among the samples. On the other hand, the pH and titratable acidity were found to be inversely proportional to the concentration of alovera gel addition in yoghurt. In theresults offat content that all the experimental samples were shown gradual decreasing effect when compared with the control sample. As per the result of protein, Vitamin C and minerals of experimental samples have foundconstant effect when compared to control sample.The content of fiber was absent in control whereas in the aloevera gel concentrated samples AY1, AY2 and AY3 contains 0.19, 0.23 and 0.26 respectively. On the qualities of phytonutrients of steroids, saponins, phlabotannin and anthroquinone were founde in all the samples except control.

scholarly journals Kauser-Wilhelm Gesellschaft: Report to the Royal Society

1939 ◽  
Vol 2 (1) ◽  
pp. 11-11 ◽  
Keyword(s):  
Royal Society ◽  
Research Work ◽  
The Other ◽  
Research Institutes ◽  
Other Hand ◽  
General Impression

The outstanding impression left from our visit is a memory of the extraordinary kindness of the hospitality which we received: in particular the officials of the Kaiser-Wilhelm Gesellschaft took the utmost pains to organize our visit so that we could utilize the time at our disposal as profitably as possible. Our greatest privilege was that of meeting our colleagues at Dahlem and seeing their remarkable group of institutes, which together, are comparable in size to a university. The research work carried out there is world renowned and hence need not be specified in detail. Our general impression was that this organization provided ideal conditions for research. The heads of the institutes could devote their uninterrupted attention to research whilst the equipment and staffing were much superior to those in most universities. On the other hand, the grouping together of the institutes prevented the isolation which is so commonly a trouble with research institutes.

Development of Haptic-Enabled Virtual Reality Applications for Engineering, Medicine and Art

2015 ◽  
Author(s):  
Hugo I. Medellín-Castillo ◽  
Germánico González-Badillo ◽  
Eder Govea ◽  
Raquel Espinosa-Castañeda ◽  
Enrique Gallegos
Keyword(s):  
Virtual Reality ◽  
Virtual Environment ◽  
Force Feedback ◽  
Research Work ◽  
Three Dimensional ◽  
Haptic Device ◽  
The Other ◽  
Virtual Objects ◽  
Other Hand ◽  
And Training

The technological growth in the last years have conducted to the development of virtual reality (VR) systems able to immerse the user into a three-dimensional (3D) virtual environment where the user can interact in real time with virtual objects. This interaction is mainly based on visualizing the virtual environment and objects. However, with the recent beginning of haptic systems, the interaction with the virtual world has been extended to also feel, touch and manipulate virtual objects. Virtual reality has been successfully used in the development of applications in different scientific areas ranging from basic sciences, social science, education and entertainment. On the other hand, the use of haptics has increased in the last decade in domains from sciences and engineering to art and entertainment. Despite many developments, there is still relatively little knowledge about the confluence of software, enabling hardware, visual and haptic representations, to enable the conditions that best provide for an immersive sensory environment to convey information about a particular subject domain. In this paper, the state of the art of the research work regarding virtual reality and haptic technologies carried out by the authors in the last years is presented. The aim is to evidence the potential use of these technologies to develop usable systems for analysis and simulation in different areas of knowledge. The development of three different systems in the areas of engineering, medicine and art is presented. In the area of engineering, a system for the planning, evaluation and training of assembly and manufacturing tasks has been developed. The system, named as HAMS (Haptic Assembly and Manufacturing System), is able to simulate assembly tasks of complex components with force feedback provided by the haptic device. On the other hand, in the area of medicine, a surgical simulator for planning and training orthognathic surgeries has been developed. The system, named as VOSS (Virtual Osteotomy Simulator System), allows the realization of virtual osteotomies with force feedback. Finally, in the area of art, an interactive cinema system for blind people has been developed. The system is able to play a 3D virtual movie for the blind user to listen to and touch by means of the haptic device. The development of these applications and the results obtained from these developments are presented and discussed in this paper.

Use of Regression Models to Study Silk Reeling

2012 ◽  
Vol 7 ◽  
pp. 35-40
Author(s):  
J.I. Mwasiagi ◽  
J.R. Ochola ◽  
I.M. Wambua ◽  
A.W. Musembi ◽  
J.K. Lusweti
Keyword(s):  
Regression Models ◽  
Research Work ◽  
The Other ◽  
Silk Cocoon ◽  
Other Hand ◽  
Silk Filament ◽  
Silk Yarn

The Quality of Silk Yarn Is Affected by the Reeling Process. the Silk Reeling Process Is Affected by Several Factors which Include the Reeling Temperature and Silk Cocoon Boiling Time. the Aim of this Paper Was to Investigate the Effect of Reeling Temperature and Cocoon Boiling on the Silk Filament Strength and Frequency of End Breaks during Reeling by Using Regression Models. the Results of this Research Work Indicated that Boiling Time and Reeling Temperature Were Positively Correlated with Filament Strength. on the other Hand the Number of End Breaks Increased with Boiling Time. as Reeling Temperature Increased the Number of End Breaks Showed a Decreasing Trend.

scholarly journals The effect of different drying methods on non-volatile and volatile components and immunomodulatory activity of Osmamthus fragrans flowers

2020 ◽  
Author(s):  
Yuexing Chang ◽  
Junjie Lin ◽  
Siqing Pan ◽  
Yanlin Jing ◽  
Ailing Guo ◽  
...  
Keyword(s):  
Microwave Drying ◽  
Chemical Components ◽  
Immunomodulatory Activity ◽  
Volatile Components ◽  
Drying Methods ◽  
Drying Method ◽  
Quick Lime ◽  
Oven Drying ◽  
Sun Drying ◽  
Linalool Oxide

Abstract Background: Osmamthus fragrans (O. fragrans) has high ornamental, edible and medicinal value in China. The components of its flowers have been gradually revealed, but the active ingredients with immunoregulatory activity have been unknown. Also, it needs to be studied that which groups and drying methods can make O. fragrans fowers produce more immunomodulatory activity. This study aimed to investigate the effects of drying methods on non-volatile and volatile components of O. fragrans flowers from three groups, and to further explore if their groups and drying methods had an ovious effect on their immunoregulatory activity.Methods: O. fragrans flowers from three groups such as “Aurantiacus”, “Latifolius” and “Thunbergii” were dried with shade drying, sun drying, quick-lime drying, oven drying and microwave drying method, respectively. The non-volatile components such as salidroside, verbascoside, oleanolic acid and ursolic acid and volatile components such as linalool, linalool oxide, geraniol, α-ionone and β-ionone of O. fragrans flowers above were determined by high-performance liquid chromatography (HPLC) and gas chromatography (GC), respectively. The immunomodulatory activities of chemical components above were investigated by the neutral red uptake assay.Results: There are more non-volatile components and less volatile components in O. fragrans flowers from Aurantiacus group and Latifolius group than Thunbergii group. Microwave drying and oven drying at high temperature were beneficial for the preservation of the bioactive non-volatile components for killing enzyme and protecting glycoside. Other drying methods such as shade drying, sun drying, quick-lime drying and oven drying at low temperature were beneficial to their preservation of the fragrant volatile components. Salidroside, verbascoside, linalool, and linalool oxide had the better immunoregulatory activity than other ingredients. In addition, non-volatile components played a more important role in the contribution to the immunoregulatory activity than the volatile components as the former was almost 1000 times as much as the latter. Conclusions: O. fragrans flowers from Aurantiacus group with microwave drying (high fire) method had the best immunoregulatory activity. The research could provide some evidence in choosing drying method of O. fragrans flowers as food or medicine.

Sign in / Sign up

Export Citation Format

Share Document