scholarly journals Study of some affecting factors in the production of instant nutritional powder from sea snail Indothais lacera (Born, 1778)

2021 ◽  
Vol 63 (9) ◽  
pp. 54-58
Author(s):  
Doan Dung Le ◽  
◽  
Thi Yen Dang ◽  
Thi Huong Vu ◽  
Thi Hong Ngoc Nguyen ◽  
...  
Keyword(s):  
Moisture Content ◽  
Economic Value ◽  
Snail Species ◽  
Optimal Conditions ◽  
Affecting Factors ◽  
The North ◽  
Rocky Reefs ◽  
Optimum Ph ◽  
Drying Condition ◽  
Ph Level

Sea snail Indothais lacera (Born, 1778) is found along coral reefs and rocky reefs in the coastal zone from the north to the south of Vietnam. Currently, most of this species are being used as fresh seafood, so their economic value is not high. This study aims to investigate some optimal conditions in the production of instant nutritional powder from Indothais lacera to diversify food varieties and create a high economic value for this sea snail species. Experiments were carried out to examine the conditions of boiling and drying, then some nutritional compositions of snail meat were analysed after being boiled and dried. The results showed that using phosphoric acid to adjust the pH level of water for boiling sea snail indicated the optimum pH level of boiling water was 5.5; the shells were boiled in 5 minutes after boiling. Under these conditions, the protein content of boiled snail meat was 64.18±4.23%. The boiled snail meat was cut into small pieces then dried. The optimal drying condition was the temperature at 50oC for 15 hours, when the snail meat contained the highest content of protein and vitamin C of 66.07±4.81% and 0.66±0.036 mg/g, respectively; the moisture content of dried snail meat was 4.28±0.48% suitable for producing instant nutritional powder

Demand for Herbaceous Ornamental Germplasm from the North Central Regional Plant Introduction Station

HortScience ◽  
1996 ◽  
Vol 31 (4) ◽  
pp. 650f-650
Author(s):  
Mark P. Widrlechner
Keyword(s):  
Active Sites ◽  
Economic Value ◽  
Plant Introduction ◽  
Expert Advice ◽  
Recent Analysis ◽  
Public And Private ◽  
North Central ◽  
The North ◽  
North Central Regional ◽  
Crop Germplasm

In 1991, the USDA–ARS North Central Regional Plant Introduction Station made available for distribution 129 accessions of germplasm representing 31 genera of herbaceous ornamentals. This number increased to 329 accessions of 42 genera by 1995. During 1991–95, more than 500 seed packets were distributed to fulfill requests for these plants received from a diverse array of public and private researchers. An analysis of this demand together with expert advice from Crop Germplasm Committees and technical considerations, such as ease of culture and seed production, can help set priorities to plan germplasm regeneration to meet future demand. A recent analysis of demand at U.S. National Plant Germplasm System active sites indicated that demand ranging between 0.23 and 0.97 distributions per available accession per year was typical. Of the 42 ornamental genera analyzed in this study, 9 were demanded more frequently than was typical, 10 were demanded less frequently, with the remainder in the typical range. In order of increasing frequency, the nine genera with the highest distribution rates were Verbena, Gypsophila, Echinacea, Lapeirousia, Delphinium, Cerastium, Baptisia, Lilium, and Tanacetum. Six of these genera are represented only by a single available accession. Notably, Echinacea and Tanacetum are of research interest both as ornamentals and as medicinal/industrial crops. This poster gives a brief overview of the economic value of these genera, display the results of the demand analysis, discuss the results relative to recommendations from Crop Germplasm Committees and requestors, and consider how demand can shape management plans for the acquisition and regeneration of ornamental germplasm.

scholarly journals Electrical Capacitance Characteristics of Wood Chips at Low Frequency Ranges: A Cheap Tool for Quality Assessment

Sensors ◽  
2021 ◽  
Vol 21 (10) ◽  
pp. 3494
Author(s):  
Jakub Lev ◽  
Václav Křepčík ◽  
Egidijus Šarauskis ◽  
František Kumhála
Keyword(s):  
Moisture Content ◽  
Linear Models ◽  
Economic Value ◽  
Wood Chip ◽  
Principal Component ◽  
Dissipation Factor ◽  
Industrial Applications ◽  
Wood Chips ◽  
Electrical Capacitance ◽  
Low Frequencies

Moisture content is one of the most important parameters related to the quality of wood chips that affects both the calorific and economic value of fuel chips. For industrial applications, moisture content needs to be detected quickly. For this purpose, various indirect moisture content measurement methods (e.g., capacitance, NIR, microwave, ECT, X-ray CT, and nuclear MR) have been investigated with different results in the past. Nevertheless, determining wood chip moisture content in real time is still a challenge. The main aim of this article was therefore to analyze the dielectric properties of wood chips at low frequencies (10 kHz–5 MHz) and to examine the possibility of using these properties to predict wood chip moisture content and porosity. A container-type probe was developed for this purpose. The electrical capacitance and dissipation factor of wood chips with different moisture content was measured by an LCR meter at 10 kHz, 50 kHz, 100 kHz, 500 kHz, 1 MHz, and 5 MHz frequencies. Wood chip porosity was also measured using a gas displacement method. Linear models for moisture content and porosity prediction were determined by backward stepwise linear regression. Mathematical model was developed to better understand the physical relationships between moisture content, porosity, and electrical capacitance. These models were able to predict the moisture content of observed quantities of wood chips with the required accuracy (R2 = 0.9−0.99). This finding opens another path to measuring the moisture content and porosity of wood chips in a relatively cheap and fast way and with adequate precision. In addition, principal component analysis showed that it is also possible to distinguish between individual wood chip fraction sizes from the information obtained.

scholarly journals Reducing Substrate Moisture Content during Greenhouse Production of Poinsettia Improves Postproduction Quality and Economic Value

HortScience ◽  
2018 ◽  
Vol 53 (11) ◽  
pp. 1618-1628
Author(s):  
Yanjun Guo ◽  
Terri Starman ◽  
Charles Hall
Keyword(s):  
Moisture Content ◽  
Economic Value ◽  
Growth Index ◽  
Dry Weight ◽  
Leaf Number ◽  
Stem Length ◽  
Total Production ◽  
Greenhouse Production ◽  
Ethylene Concentration ◽  
Substrate Moisture

The objective was to determine the effect of substrate moisture content (SMC) during poinsettia (Euphorbia pulcherrima) greenhouse production on plant quality, postproduction longevity, and economic value. Two experiments were conducted, one in 2016 with ‘Freedom Red’ and the other in 2017 with ‘Christmas Eve Red’. Treatments included two SMC levels (20% or 40%) applied in four timing of application combinations. Total production (TP) time was 14 (2016) or 12 (2017) weeks in which vegetative production (VP) occurred from week 33 (2016) or 35 (2017) to week 39 and reproductive production (RP) continued from week 40 to 47. The four timing of application treatments were 40/40 = TP at 40% SMC; 20/40 = VP at 20% + RP at 40%; 40/20 = VP at 40% + RP at 20%; 20/20 = TP at 20% SMC. After simulated shipping in the dark, plants were evaluated in a simulated retail environment with two packaging treatments: no sleeve covering or plastic perforated plant sleeves covering container and plant. At the end of greenhouse production, plants grown in 20% SMC during RP (20/20 and 40/20) had shorter bract internode length, stem length, and smaller growth index (GI), decreased shoot and root dry weight (DW), and bract and leaf surface area compared with those in 40% SMC during RP (40/40 and 20/40). Photosynthetic rate was higher when plants were watered at 40% SMC regardless of production stage compared with those in 20% SMC. Leaf thickness, petiole thickness, total bract and leaf number were unaffected by SMC treatments. Plants in 20% SMC during RP (20/20 or 40/20) had earlier bract coloring despite days to anthesis being the same for all SMC treatments. Compared with 40/40, 40/20, and 20/20 could save 44.2% or 43.6%, respectively, irrigation and fertilizer usage, and 39.1% and 47.8%, respectively, labor time. During postharvest, ethylene concentration was unaffected by packaging method. Sleeved plants, regardless of SMC treatment, received lower light intensity in the middle of the plant canopy, causing plants to have lower total leaf number due to abscission and SPAD reading at the end of postproduction. The 40/40 treatment abscised more bracts during five weeks (in 2016) of postproduction and with no sleeve had higher number of bracts with bract edge burn (BEB). In summary, reducing SMC to 20% during TP or RP reduced water usage during production and produced more compact plants with increased postproduction quality.

scholarly journals Optimal Conditions For Production Acidic D-Xylanase By Aspergillus niger in Submerged Fermentation

2011 ◽  
Vol 5 (3) ◽  
pp. 14-21
Author(s):  
Muhamed Omar Abdulatif ◽  
Hyder H. Assmaeel ◽  
Raghad kadhim Obeid ◽  
Ayat Adnan Abbas
Keyword(s):  
Aspergillus Niger ◽  
Rice Husk ◽  
Enzyme Production ◽  
Inoculum Size ◽  
Optimal Conditions ◽  
Optimum Conditions ◽  
Xylanase Production ◽  
Primary Isolation ◽  
Optimum Ph ◽  
Optimum Period

he Xylanase producing strain Aspergillus niger was isolated from soil on potato dextrose agar in the presence of xylan as its first substrate for primary isolation, and then grown under liquid medium fermentation in the presence of crude xylan (rice husk) to produce D-Xylanase. the optimum conditions were determined as follows: the Optimum pH for xylanase production was found pH 5.0, xylanase was induced by xylan (rice husk) 0.1% and the production was (61.221 U/ml) and nitrogen source Yeast extract recorded highest enzyme production( 89.71 U/ml), and repressed by carbon source xylose the highest enzyme production (88.69 U/ml). The optimum temperature was 40°с for xylanase production was (35.15 U/ml), the optimum period after 7 days of incubation was (52.33 U/ml) ,the optimum substrate concentration 0.1% was (45.95 U/ml), and the optimum inoculum size was 1 x 106 (spore /ml) recorded (57.19 U/ml ).

The assay and partial characterization of 3β-hydroxysteroid sulfotransferase of the hamster epididymis

1985 ◽  
Vol 63 (1) ◽  
pp. 71-76 ◽  
Author(s):  
M. Bouthillier ◽  
G. Bleau ◽  
A. Chapdelaine ◽  
K. D. Roberts
Keyword(s):  
Organic Phase ◽  
Enzyme Preparation ◽  
Enzymatic Reaction ◽  
Partial Characterization ◽  
Optimal Conditions ◽  
Steroid Nucleus ◽  
Optimum Ph ◽  
High Concentrations

Using a partially purified enzyme preparation obtained from hamster epididymis, a simple assay has been developed to measure the sulfurylation of dehydroisoandrosterone (DHA) and desmosterol in the presence of 3′-phosphoadenosine 5′-phospho[35S]sulfate ([35S]PAPS). After stopping the enzymatic reaction with methanol and KCl, the 35S-labelled steroid sulfates are readily extracted into an organic phase. Optimal conditions for the sulfurylation of the two steroids were compared; optimum pH is 8.7 for DHA and 9.8 for desmosterol. Sulfoconjugation of desmosterol increases with magnesium concentrations up to 6 mM, while 40 mM concentrations of the divalent ion are required for the optimal sulfurylation of DHA. Maximum sulfurylation of these steroids requires the presence of 15 mM cysteine. Michaelis–Menten kinetics are observed with DHA which has an apparent Km of 32 μM, while desmosterol inhibits sulfotransferase activity at high concentrations. Saturation of the enzyme with PAPS results in an allosteric behaviour. Only the 3β-hydroxyl function of the steroid nucleus appears to be an appropriate sulfate acceptor for the epididymal hydroxysteroid sulfotransferase.

Scour Depth Prediction for Asa Dam Bridge, Ilorin, Using Artificial Neural Network

2020 ◽  
Vol 47 ◽  
pp. 53-62
Author(s):  
Samson Olalekan Odeyemi ◽  
Mutiu Adelodun Akinpelu ◽  
Rasheed Abdulwahab ◽  
Kazeem Adeshina Dauda ◽  
Stella Chris-Ukaegbu
Keyword(s):  
Economic Value ◽  
Economic Life ◽  
Scour Depth ◽  
Bridge Scour ◽  
Average Flow Velocity ◽  
Sediment Size ◽  
The North ◽  
Depth Prediction ◽  
Pile Cap ◽  
Artificial Neural

Bridge Scour is the localized loss of the geomaterials around the foundation of a bridge as a result of the movement of water around it. Scour is a great risk to the stability of a bridge’s foundation, thus leading to collapse, loss of lives and setback in a nation’s socio-economic life. Artificial Neural Networks (ANN) are collections of simple, highly connected processing elements that learn according to sets of input parameters and use that to simulate the networks of nerve cells of humans or animal central nervous system. The Asa Dam Bridge, one of the longest bridges in Ilorin, Kwara State, Nigeria, has five (5) spans of 20m each. The bridge connects Ilorin to the Ogbomosho Express way (leading to the western part of the country) and the Eyenkorin-Jebba road (leading to the north). Thus, the bridge has a high economic value. In this research, factors such as flow depth, average flow velocity of the river and median sediment size were investigated to show how they affect the depth of scour around the bridge pile foundation. Data were taken for a period of 48 weeks and ANN was applied to predict and generate a model that shows how these factors relate to the scour depth of the riverbed. The model revealed that the hydraulic parameters and soil grading around the pile cap of Asa River Bridge bears significant influence on the scour depth of its foundation. The model was compared with five (5) other established scour equations.

scholarly journals Chilled Aeration to Control Pests and Maintain Grain Quality during Summer Storage of Wheat in the North Central Region of Kansas

2019 ◽  
Vol 35 (4) ◽  
pp. 657-688
Author(s):  
Alejandro Morales-Quiros ◽  
Carlos Campabadal ◽  
Dirk E. Maier ◽  
Sonia M.N. Lazzari ◽  
Flavio A. Lazzari ◽  
...  
Keyword(s):  
Moisture Content ◽  
Grain Quality ◽  
Insect Pest ◽  
Reproduction Rate ◽  
Ambient Conditions ◽  
Flour Quality ◽  
The North ◽  
Chilling Temperatures ◽  
Steel Silos ◽  
Grain Temperature

Abstract.Chilled aeration allows grain to be cooled, independent of ambient conditions, to “safe” temperatures at which insects, fungi, and spoilage development are reduced to a minimum. The objective of this research was to evaluate the advantages of using grain chilling to preserve the quality of grain and reduce post-harvest losses caused by insects and fungi, compared to the conventional aeration and storage strategies used during summer storage in central Kansas. The research trials were developed at a farmer’s cooperative in central Kansas in 2015 and 2016 on low-moisture wheat harvested during the summer of 2015 and 2016, respectively, and stored in two 1,350 metric ton (t) steel silos in which one was chilled and the other was used as a control managed by the cooperative. Temperature of the grain inside each silo was monitored with temperature cables. Variables evaluated were: moisture content (MC), grain and flour quality, insect-pest development and reproduction rate, insect fragments per 500 g of grain, and fungi presence. In 2015, the chilling treatment reduced the grain temperature from 28°C to 17°C in approximately 175 h, while in 2016 it took 245 h to reach about the same temperature with an initial grain temperature of 39°C. Grain temperatures below 25°C were not achieved in the control silo during the summer using ambient aeration. Minimum variation of MC was observed in the Chilled silo while ambient aeration reduced the moisture content by 0.5%. Reproduction rates of the red flour beetle and lesser grain borer were significantly reduced by chilling temperatures lower than 17°C. Lower temperatures also reduced insect populations detected in probe traps and insect damaged kernels. Insect fragments and fungi presence had no significant increase throughout the trials in either of the silos. No clear evidence of flour quality being better preserved at lower temperatures was detected. The energy cost of running the grain chiller was between 0.26-0.32 $/t higher than ambient aeration. Keywords: Ambient aeration, Grain chilling, Grain quality, Stored-product fungi, Stored-product insects, Summer storage, Wheat.

scholarly journals Estimating the aboveground carbon sequestration and its economic value (case study: Iranian Caspian forests)

2017 ◽  
Vol 63 (No. 11) ◽  
pp. 511-518 ◽  
Author(s):  
Mohammadi Zohreh ◽  
Limaei Soleiman Mohammadi ◽  
Lohmander Peter ◽  
Olsson Leif
Keyword(s):  
Carbon Sequestration ◽  
Net Present Value ◽  
Economic Value ◽  
Volume Growth ◽  
Allometric Equation ◽  
Present Value ◽  
Diameter Increment ◽  
Aboveground Carbon ◽  
The North ◽  
Annual Volume

The aim of the study is to estimate the aboveground carbon sequestration and to determine the economic value of forests in carbon sequestration as a way of mitigating climate change. This research was conducted at Asalem forests in the north of Iran. In order to estimate the amount of annual carbon sequestration, the annual volume growth of stand was determined using the diameter increment data and tariff. The amount of carbon sequestration was estimated based on wood density and using the allometric equation. The carbon model was obtained for each species. The value of sequestrated carbon in stumpage and the net present value of carbon sequestration were determined in order to estimate the economic value of carbon sequestration. Results indicated that the annual volume growth per hectare and the carbon stored are 6.023 m<sup>3</sup>·yr<sup>–1</sup> and 2.307 t·ha<sup>–1</sup>, respectively. Finally, the carbon sequestration value of stumpage and the net present value of carbon sequestration are 11,023.753 and 790.361 (10,000 IRR·t<sup>–1</sup>·ha<sup>–1</sup>), respectively. Our results are very useful in estimating the total economic value of Asalem forests and other Iranian Caspian forests in the future.

scholarly journals Characteristics of Xanthomonas cucurbitae Isolates from Pumpkins and Survival of the Bacterium in Pumpkin Seeds

Plant Disease ◽  
2018 ◽  
Vol 102 (9) ◽  
pp. 1779-1784 ◽  
Author(s):  
X. Zhang ◽  
M. Babadoost
Keyword(s):  
The United States ◽  
Culture Collection ◽  
Colony Development ◽  
North Central Region ◽  
North Central ◽  
The North ◽  
Significant Difference ◽  
Optimum Ph ◽  
Pumpkin Seeds ◽  
Maximum Temperatures

This study was conducted to determine characteristics of Xanthomonas cucurbitae, the causal agent of bacterial spot of pumpkin, and survival of the bacterium in pumpkin seeds. Fourteen X. cucurbitae isolates from the north central region of the United States, along with the X. cucurbitae strain 23378 from the American Type Culture Collection, were included in this study. The range of minimum, optimum, and maximum temperatures for colony development of X. cucurbitae were 4 to 6°C, 24 to 30°C, and 34 to 36°C, respectively. Optimum pH for colony development ranged from 6.5 to 8.0. Leaves of 3-week-old pumpkins ‘Howden’ and ‘Dickinson’ were inoculated with X. cucurbitae isolates (108 CFU/ml). There was a significant difference in the postinoculation periods for appearance of bacterial lesions on the leaves among the isolates; however, there was no significant difference in diameters of the lesions on each of the pumpkin cultivar 7 days after inoculation. Four of the isolates caused significantly larger lesions on ‘Dickinson’ leaves than ‘Howden’ leaves. Naturally infected ‘Howden’ pumpkin and inoculated ‘Dickinson’ pumpkin seeds with X. cucurbitae were stored at 4 and 22°C. X. cucurbitae was isolated from both naturally infected and inoculated seeds 24 months after storage at both 4 and 22°C, and the isolated bacteria were pathogenic.

scholarly journals PHENOLIC PROFILE OF HONEYDEW HONEYS FROM THE NORTH-EAST PART OF ROMANIA

2016 ◽  
Vol 73 (2) ◽  
pp. 105
Author(s):  
Mircea OROIAN ◽  
Sorina ROPCIUC ◽  
Amalia BUCULEI ◽  
Sergiu PADURET ◽  
Elena TODOSI
Keyword(s):  
European Union ◽  
Moisture Content ◽  
The European Union ◽  
Free Acidity ◽  
Glucose Content ◽  
Phenolic Profile ◽  
East Part ◽  
North East ◽  
The North ◽  
Acidic Nature

The aim of this study is to determine the physicochemical (moisture content, pH, free acidity, electrical conductivity, colour (L*, a*, b*, chroma, hue angle), ash content, fructose and glucose content) and to determine the phenolic profile (quercetin, apigenin, myricetin, isorhamnetin, kaempherol, caffeic acid, chrysin, galangin, luteolin, p-coumaric acid, gallic acid and pinocembrin) of five samples of honeydew honeys from the North East part of Romania. The honey samples analysed respected the maximum allowable level of the moisture content, which is established by the European Union at 20%. The acidic nature of the honeydew is confirmed by the level of the pH and free acidity of the samples, and is influenced in principal by the organic acids; all the samples had a free acidity lower than 50 meq acid/kg. The honey colour is dark which is confirmed by the level of the CIE L*a*b* parameters (lower values of L*, a* and b*). The inverted sugar level (fructose and glucose content) is higher than 60 g/ 100g, respecting the European Union directive. The phenolic profile of the honeydew samples do not presented one compound that can be considered a chemical marker, the major polyphenols presented into the honeydew honeys are quercetin and pinocembrin.

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