Pressing Peanuts with a Ring-Cage Screw Press1

1980 ◽  
Vol 7 (1) ◽  
pp. 38-40 ◽  
Author(s):  
L. A. Johnson
Keyword(s):  
Protein Solubility ◽  
Heat Exposure ◽  
Screw Press ◽  
Protein Damage ◽  
Peanut Flour ◽  
Residual Oil ◽  
Screw Pressing ◽  
Press Temperature ◽  
Conditioning Temperature

Abstract A ring-cage screw press was examined as a means of reducing protein insolublization and chemical browning of peanut protein during prepressing of peanuts. It was found possible to prepress uncooked peanuts with moderate heat exposure. Effects of conditioning temperature, screw press pressure and screw press temperature on quality of peanut flour were surveyed. Some protein damage occurred during conditioning but the greatest amount of protein insolublization occurred during screw pressing. The rate of post screw press cooling had little effect on protein solubility. The ring-cage screw press was able to press conditioned peanuts to 5–10% residual oil with less heat damage than occurs in cooking and screw pressing, as commercially practiced. Improved pressing conditions for producing food-grade peanut flour using the ring-cage screw press were identified as conditioning seed to 60°C within 6 min. and pressing at 60°C. Increased soluble protein and less chemical browning resulted in ring-cage screw pressed, solvent extracted flour than occurring in conventionally processed peanut flour.

INFLUENCE OF PARAMETERS OF PREPARATION OF MELON SEEDS ON THE QUALITY OF OIL AND CAKE IN A SINGLE PRESSING ON A SCREW PRESS

2019 ◽  
Author(s):  
Г.Х. МИРЗОЗОДА ◽  
В.В. ДЕРЕВЕНКО ◽  
П.М. ПУГАЧЕВ
Keyword(s):  
Crude Protein ◽  
Oil Content ◽  
Screw Press ◽  
Residual Oil ◽  
Optimal Parameters ◽  
Operational Control ◽  
Processed Material ◽  
Object Of Study ◽  
Melon Seeds

Исследована зависимость выхода масла, массовой доли сырого протеина и остаточной масличности в жмыхе от содержания плодовой оболочки в перерабатываемом материале. Объектом исследования была ядровая фракция семян дыни сорта Амири, выращенной в Таджикистане. Предварительно семена дыни масличностью 35,3 обрабатывали ИКоблучением с нагревом до 90С. Затем их обрушивали однократным ударом в модернизированной центробежной рушке. Из полученной рушанки готовили образцы модельной смеси ядровой фракции семян дыни с содержанием плодовой оболочки 8, 14, 20 и 25. Перед отжимом масла каждый образец ядровой фракции нагревали до температуры 6870С в установке с ИКэнергоподводом. Влажность образцов составляла (6,0 0,2). Отжим масла из семян дыни проведен в стендовых условиях на шнековом прессе DUO (Farmet a.s., Чехия) при установленных оптимальных параметрах работы шнекового пресса: частоте вращения вала 40 об/мин диаметре выходного отверстия съемной насадки 6 мм величине зазора между основанием шнека и прессующей головкой 3 мм. Установлено, что при снижении содержания плодовой оболочки в ядровой фракции до 8 выход дынного масла увеличивается до 37, содержание сырого протеина в жмыхе на абсолютно сухое вещество повышается до 56, масличность получаемого жмыха уменьшается до 9. При этом улучшаются качественные показатели дынного масла. По результатам исследований получены уравнения для расчета показателей выхода дынного масла, содержания сырого протеина и масличности жмыха в зависимости от содержания плодовой оболочки в ядровой фракции семян дыни, которые можно использовать для оперативного управления технологическим процессом и прогнозирования показателей качества получаемой продукции. The dependence of the oil yield, the mass fraction of crude protein and the residual oil content in the cake on the content of the fruit shell in the processed material was investigated. Sound fraction of melon seeds variety Amiri grown in Tajikistan has been the object of study. Preliminary melon seeds with oil content of 35,3 were treated with IRirradiation heated to 90C. Then melon seeds were brought down by a single blow in a modernized centrifugal hulling machine. From the obtained hulling seeds samples of the model mixture of the sound fraction with the content of the fruit shell 8, 14, 20 and 25 were prepared. Before pressing the oil, each sample was heated to a temperature of 6870C in an IRenergized installation. Humidity of samples was (6,0 0,2). Extraction of oil from melon seeds is carried out in bench conditions on the screw press DUO (Farmet a.s., Czech Republic) at the set optimal parameters of the screw press: shaft speed of 40 rpm the diameter of the outlet of the removable nozzle 6 mm the gap between the base of the screw and the pressing head 3 mm. It was found that when the fruit shell is reduced to 8 in the sound fraction, the yield of melon oil increases to 37, the content of crude protein in the cake increases to 56 and the oil content of the obtained cake decreases to 9. This improves the quality of melon oil. According to the results of studies of the equation for calculating the yield of melon oil, crude protein content and oil content of oil cake, depending on the content of the fruit shell in the sound fraction of melon seeds obtained. These equations can be used for operational control of technological process and forecasting of indicators of quality of the received production.

scholarly journals Solubility of cytoskeletal proteins in immunohistochemistry and the influence of fixation.

1993 ◽  
Vol 41 (4) ◽  
pp. 609-616 ◽  
Author(s):  
B M Riederer ◽  
R Porchet ◽  
R A Marugg ◽  
L I Binder
Keyword(s):  
Protein Solubility ◽  
Immunohistochemical Localization ◽  
Influential Factors ◽  
Cytoskeletal Proteins ◽  
Fixed Tissue ◽  
Aldehyde Fixation ◽  
Cat Brain ◽  
Spectrin Cytoskeleton ◽  
Cryostat Sections

For accurate and quantitative immunohistochemical localization of antigens it is crucial to know the solubility of tissue proteins and their degree of loss during processing. In this study we focused on the solubility of several cytoskeletal proteins in cat brain tissue at various ages and their loss during immunohistochemical procedures. We further examined whether fixation affected either solubility or immunocytochemical detectability of several cytoskeletal proteins. An assay was designed to measure the solubility of cytoskeletal proteins in cryostat sections. Quantity and quality of proteins lost or remaining in tissue were measured and analyzed by electrophoresis and immunoblots. Most microtubule proteins were found to be soluble in unfixed and alcohol fixed tissues. Furthermore, the microtubule proteins remaining in the tissue had a changed cellular distribution. In contrast, brain spectrin and all three neurofilament subunits were insoluble and remained in the tissue, allowing their immunocytochemical localization in alcohol-fixed tissue. Synapsin I, a protein associated with the spectrin cytoskeleton, was soluble, and aldehyde fixation is advised for its immunohistochemical localization. With aldehyde fixation, the immunoreactivity of some antibodies against neurofilament proteins was reduced in axons unveiling novel immunogenic sites in nuclei that may represent artifacts of fixation. In conclusion, protein solubility and the effects of fixation are influential factors in cytoskeletal immunohistochemistry, and should be considered before assessments for a quantitative distribution are made.

Studying demulsifier reactants for crude oil processing facilities

2021 ◽  
pp. 90-104
Author(s):  
L. V. Taranova ◽  
A. G. Mozyrev ◽  
V. G. Gabdrakipova ◽  
A. M. Glazunov
Keyword(s):  
Crude Oil ◽  
Bottom Water ◽  
Oil Content ◽  
Optimal Consumption ◽  
Residual Oil ◽  
Well Production ◽  
Oil Processing ◽  
Water Cut ◽  
Required Quality

The article deals with the issues of improving the quality of highly watered well production fluid processing using chemical demulsifier reactants at crude oil processing facilities; the analysis of the use of the reactants at the Samotlor field has been made. The article presents the results of the study of the effectiveness of the "Hercules 2202 grade A" and "SNPH-4460-2" demulsifiers in comparison with the indicators of oil and bottom water processing achieved in the presence of the reactants used at existing facilities; their optimal consumption has been determined. The study has shown that the selected demulsifiers provide the required quality of the oil and water under processing at the considered oil processing facilities and can be used along with the basic reactants for these facilities. On the basis of total indicators, the best results have been achieved using "Hercules 2202 grade A" with the improved indicators of water cut and residual oil content in water by 33.9 % and 2.8 % while reducing the reactant consumption by 9.7 % compared to the basic demulsifier.

Effects of Mixing Ratio between Eucalyptus Bark Charcoal and Cassava Starch on the Performance of a Charcoal Block Pressing Unit

2014 ◽  
Vol 931-932 ◽  
pp. 1568-1573
Author(s):  
Kittipong Laloon ◽  
Somposh Sudajan
Keyword(s):  
Water Content ◽  
Specific Energy Consumption ◽  
Cassava Starch ◽  
Screw Press ◽  
Mixing Ratio ◽  
Screw Pressing ◽  
Factors Affecting ◽  
Mixing Ratios ◽  
Eucalyptus Bark ◽  
Press Unit

The objective of this research was to study on charcoal block production from eucalyptus bark using screw press unit. The physical and thermal properties of charcoal and factors affecting the testing units performance, which were mixing ratios by weight of eucalyptus bark charcoal: cassava starch: water content (1: 0.10: 0.75, 1: 0.15: 0.75 and 1: 0.20: 0.75) and screw pressing speeds (90, 105, 120 and 135 rpm) were studied. The optimum of screw press unit was screw pressing speed of 120-135 rpm and a mixing ratio by weight of eucalyptus bark charcoal: cassava starch: water content of 1: 0.15: 0.75. The test result at the feed rate of 140 kg/hr indicated that the machine had a capacity of 119.71-121.95 kg/hr, specific energy consumption of 12.33-12.73 W-hr/kg, charcoal block bulk density of 467.55 to 468.88 kg/m3, charcoal strength of 152.58 to 153.60 kPa and heating value of 21.95 MJ/kg for charcoal block moisture content of 7.46 % (w.b.)

scholarly journals Changes in expression of monocarboxylate transporters, heat shock proteins and meat quality of Large White Yorkshire and Ghungroo pigs during hot summer period

2017 ◽  
Author(s):  
Arun Das ◽  
Thulasiraman Parkunan
Keyword(s):  
High Temperature ◽  
Meat Quality ◽  
Protein Denaturation ◽  
Protein Solubility ◽  
Drip Loss ◽  
Summer Period ◽  
Large White ◽  
Shock Proteins ◽  
Glycolytic Rate

Objective: Present study explores the effect of hot summer period on the glycolytic rate of early post-mortem meat quality of Ghungroo and Large White Yorkshire (LWY) pig and comparative adaptability to high temperature between above breeds by shifting the expression of stress related genes like mono-carboxylate transporters (MCTs) and heat shock proteins (HSPs). Methods: Healthy pigs of two different breeds, viz., LYW and Ghungroo (20 from each) were maintained during hot summer period (May to June) with a mean temperature of about 38°C. The pigs were slaughtered and meat samples from the longissimus dorsi (LD) muscles were analyzed for pH, glycogen and lactate content and mRNA expression. Following 24 h of chilling, LD muscle was also taken from the carcasses to evaluate protein solubility and different meat quality measurements. Results: LWY exhibited significantly (p<0.01) higher plasma cortisol and lactate dehydrogenase concentration than Ghungroo indicating their higher sensitivity to high temperature. LD muscle from LWY pigs revealed lower initial and ultimate pH values and higher drip loss compared to Ghungroo, indicating a faster rate of pH fall. LD muscle of Ghungroo had significantly lower lactate content at 45 min postmortem indicating normal postmortem glycolysis and much slower glycolytic rate at early postmortem. LD muscle of LWY showed rapid postmortem glycolysis, higher drip loss and higher degrees of protein denaturation. Ghungroo exhibited slightly better water holding capacity, lower cooking loss and higher protein solubility. All HSPs (HSP27, HSP70, and HSP90) and MCTs (MCT1, MCT2, and MCT4) in the LD muscle of pigs inclined to increase more in Ghungroo than LWY when exposed to high temperature. Conclusion: Effect of high temperature on the variation of HSPs and MCTs may play a crucial role in thermal tolerance and adaptation to different climatic conditions, pH regulation, muscle acidification, drip loss, protein denaturation and also in postmortem meat quality development.

scholarly journals Effects of Conditioning Temperature on Pellet Quality of Nursery Pig Diets

2019 ◽  
Vol 5 (8) ◽  
Author(s):  
G. E. Nichols ◽  
C. R. Stark ◽  
A. M. Ogles ◽  
K. M. Dunmire ◽  
C. B. Paulk
Keyword(s):  
Pellet Quality ◽  
Conditioning Temperature ◽  
Nursery Pig

scholarly journals Quality Parameters for Cold Pressed Edible Argan Oils

2013 ◽  
Vol 8 (1) ◽  
pp. 1934578X1300800 ◽  
Author(s):  
Bertrand Matthäus
Keyword(s):  
Oxidative Stability ◽  
Vegetable Oils ◽  
Sensory Quality ◽  
Screw Press ◽  
Raw Material ◽  
High Price ◽  
Argan Oil ◽  
Accelerated Storage ◽  
Cold Pressed

Argan oil belongs to the high-price vegetable oils on the market. Therefore, consumers have the right to purchase a high-quality product. The quality of edible vegetable oils is defined in food standards in which sensory quality is the most important feature. Additional parameters are defined to assess the identity of oils or to evaluate their oxidative state. The sensory quality of cold pressed argan oil is altered if the production has not been performed with reasonable care regarding raw material and extraction. Only oil from roasted seeds extracted by a screw-press had a sufficient sensory quality over a period of 20 weeks without unacceptable sensory attributes. Under accelerated storage conditions oil from roasted seeds extracted by a screw-press remained below the limits given by the Codex Alimentarius or the German guideline for Edible Fats and Oils for peroxide and totox value. Oil from unroasted seeds or oil from goat- digested roasted seeds and extracted by a screw-press, as well as oil from roasted seeds traditionally extracted, exceeded these limits. Initial oxidative stability of oil from unroasted seeds was significantly lower than that of the other oils. After 35 days under accelerated storage, oil from roasted seeds obtained using a screw-press showed the highest oxidative stability. Moreover, tocopherol and phytosterol compositions are useful features of argan oil.

scholarly journals The Effect of Processing Methods on Phytochemical Composition in Bergamot Juice

Foods ◽  
2019 ◽  
Vol 8 (10) ◽  
pp. 474 ◽  
Author(s):  
Domenico Cautela ◽  
Filomena Monica Vella ◽  
Bruna Laratta
Keyword(s):  
Antioxidant Activity ◽  
Epidemiological Studies ◽  
Screw Press ◽  
In Vivo Studies ◽  
Press Method ◽  
Citrus Juices ◽  
Processing Techniques

Experimental and epidemiological studies show a positive relation between consumption of citrus juices and reduction of risk for some chronic disorders, such as diabetes and cardiovascular diseases. In particular, the bergamot juice is characterized by noticeable amounts of phytochemicals such as flavanone glycosides, limonoids, and quaternary ammonium compounds, all health-beneficial biomolecules. In vitro and in vivo studies have shown anti-inflammatory, cholesterol-lowering, and anti-diabetic activities attributed to these compounds depending on their chemical structure. However, nutritional content of bergamot juice may vary as consequence of different processing techniques, thus needing to address this claim. For this reason, the objective of this research was to evaluate the effects of different processing systems on the proximate constituents, the composition, and the antioxidant activity of the correspondent juices. Overall, the results indicate that the process employed may influence the chemical composition and the functional properties of the ended juice. Screw press method produced a juice with greater content of flavanone glycosides (ranged from 37 to 402 mg/L) and limonoid aglycones (ranged from 65 to 67 mg/L) than the other processes (p < 0.001). However, the process used for extraction of bergamot juice did not affect significantly the N,N-dimethyl-L-proline content (p < 0.5). Moreover, the screw press juice showed the highest antioxidant activity with EC50 value of 9.35 µg/mL, thus suggesting that this method maintains for health the nutritional quality of a fresh-pressed juice.

scholarly journals Effects of the contents of impurities and seed hulls on the quality of cold-pressed sunflower oil

2012 ◽  
Vol 30 (No. 4) ◽  
pp. 343-350 ◽  
Author(s):  
E. Dimić ◽  
T. Premović ◽  
A. Takači
Keyword(s):  
Adverse Effect ◽  
Oxidative Stability ◽  
Sunflower Oil ◽  
Screw Press ◽  
Raw Material ◽  
Chemical Characteristics ◽  
Chemical Quality ◽  
Adverse Influence ◽  
Cold Pressed

The effects of different contents of impurities and seed hulls in the raw material on the sensory characteristics, chemical quality, and oxidative stability of sunflower oil prepared by the procedure of cold pressing on a screw press were investigated. It was found that the presence of impurities (up to 10%) and hulls (up to 32%) had an adverse effect on the sensory and chemical characteristics of the oil. The adverse influence on the oils colour was also evidenced from the results of measuring their transparency, which ranged from 14.75% to 43.60%. The presence of impurities and seed hulls caused also a decrease in the oxidative stability of oils, as the values of the induction period ranged from 3.63 h to 4.63 h, while the Totox values were in the range from 2.25 to 5.87. &nbsp;

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