Статті в журналах з теми "Seperation Process"
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Yue, Jin Cai, Na Li, Ling Qi Kong, and Shi Qing Zheng. "Study on Ethanolamine Heat Sensitivity and Seperation Process." Advanced Materials Research 233-235 (May 2011): 165–70. http://dx.doi.org/10.4028/www.scientific.net/amr.233-235.165.
Повний текст джерелаАнотація:
Ethanolamine (EA, including MEA, DEA and TEA) is a kind of heat sensitive material. It is easy to be colored at high temperature which influences the product quality and its application. This paper studies the relationship between color number and time of MEA, DEA, TEA and their mixtures at different temperatures. The result shows that MEA is most sensitive to high temperature, TEA take the second place, DEA is almost unaffected. DEA can protect TEA and MEA from being colored, the more DEA content, the better effect. According to the results of tests and process simulation, optimized parameters of separation equipment and operation are put forward which can provide guidance for the production of high purity, low color number of TEA.
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Konak, Ramazan, Nilgün Tan, Erdem Çiçek, İlknur Kösoğlu, Berrin Şahin, and Oğuz Altunkaya. "Aflatoxinous Figs (Ficus Carica L.) Seperation Process Using Ultraviolet (Uv) Light." International Journal of Innovative Approaches in Agricultural Research 2, no. 4 (December 17, 2018): 384–90. http://dx.doi.org/10.29329/ijiaar.2018.174.11.
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Shin, Dong Ju, Sung-Ho Joo, Dongseok Lee, Ho-Seok Jeon, and Shun Myung Shin. "Study for Seperation Process of Copper from the Low-grade Copper Ore by Hydrometallrugical Process." Resources Recycling 30, no. 5 (October 31, 2021): 57–66. http://dx.doi.org/10.7844/kirr.2021.30.5.57.
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Sirait, Marudut. "Studi Life Cycle Assessment Produksi Gula Tebu : Studi Kasus di Jawa Timur." Rekayasa 13, no. 2 (August 1, 2020): 197–204. http://dx.doi.org/10.21107/rekayasa.v13i2.5915.
Повний текст джерелаАнотація:
Tujuan dari makalah ini adalah untuk mengidentifikasi potensi dampak lingkungan selama proses produksi gula tebu di Jawa Timur Indonesia. Studi ini menggunakan pendekatan Life Cycle Assesment (LCA) untuk mengevaluasi dampak lingkungan selama proses produksi gula dari tebu. Analisis LCA fokus pada pengolahan tebu menjadi gula, yang terdiri dari proses persiapan, proses miling, centrifugal separation, proses clarification, proses evaporation, dan proses crystalization. Hasil Life Cycle Impact Assessment (LCIA) diekpresikan dengan metode EDIB 2003, menunjukkan bahwa dampak lingkungan yang paling signifikan terhadap penurunan kualitas lingkungan adalah global warming, acidification, eutrofikasi, human toxicity air, dan ozone depletion. Selanjutnya, proses produksi gula yang paling besar kontribusnya pada dampak lingkungan adalah proses penggilingan/miling, diikuti oleh proses centrifugal seperation,proses clarification, proses crystallization,proses evaporation, dan proses preperation untuk semua kategori dampak lingkungan.Life Cycle Assessment Study of Sugarcane: The case of East JavaABSTRACTThe purpose of this paper is to identify potential environmental impacts during the process of sugarcane production in East Java, Indonesia. This study utilized Life Cycle Assessment (LCA) approach to evaluate the environmental impact during the manufacturing of sugar cane. LCA analysis focuses on processing sugarcane, which consists of the preparation process, the milling process, centrifugal separation, the clarification process, the evaporation process, and the crystalization process. The Life Cycle Impact Assessment (LCIA) was expressed by the EDIB 2003 method. The result showed that the most significant environmental impacts on environmental degradation were global warming, acidification, eutrophication, human toxicity of water, and ozone depletion. Furthermore, the production process with the greatest contribution to environmental impact were the miling process, followed by centrifugal seperation process, clarification process, crystallization process, evaporation process, and preperation process for all categories of environmental impacts.Keywords: Environmental Impact, Energy, Sugarcane, Global Warming, Life Cycle Assessment
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Dadashzade, M. A., and S. H. Novruzova. "The main filtration characteristics of two-phase systems in the porous medium." Azerbaijan Oil Industry, no. 01 (January 15, 2023): 15–18. http://dx.doi.org/10.37474/0365-8554/2023-1-15-18.
Повний текст джерелаАнотація:
The practice justifies that the most oil fields are characterized with numerous parameters in the operation process. The pressure, phase permeability, volumetric flow rate by the phases are some of them. The changing of parameters, as a result, drastically effect the productivity of the oil wells. By course of time, the pressure drop leads to the seperation of gas from fluid in formation conditions, i.e. if the bottomhole pressure is lower than saturation pressure, the degassing takes place at the bottomhole zone, which increases the permeability of gas phase.
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Zeng, Gui Sheng, Hui Li, Su Hua Chen, Xin Man Tu, and Wen Bin Wang. "Leaching Kinetics and Seperation of Antimony and Arsenic from Arsenic Alkali Residue." Advanced Materials Research 402 (November 2011): 57–60. http://dx.doi.org/10.4028/www.scientific.net/amr.402.57.
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The separation of antimony and arsenic and leaching kinetics of arsenic from arsenic alkali residue were investigated. The influencing factors such as solid/liquid ratio, stir speed, temperature and time on leaching of arsenic were studied. The results show that the leaching rate reaches 87.75% at the condition of solid/liquid ratio of 1:4 , stir speed of 600r/min ,temperature of 90°C and time of 60min. The leaching process was controlled by the surface chemical reaction and the kinetics of leaching arsenic followed the model of shrinking core. The activation energy was found to be 666.57kJ/mol. The kinetics equation was expressed as shrinking core model.
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Jiang, Bo, Shang Hua Feng, and Jian Ping Zhang. "The Adsorption and Regeneration of Magnetic Modified Bentonite Composite for Dye Wastewater." Key Engineering Materials 905 (January 4, 2022): 338–43. http://dx.doi.org/10.4028/www.scientific.net/kem.905.338.
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Bentonite has strong adsorption for cationic dyes. But as dye absorbent, it's difficult for them to recycle and regenerate. In order to solve these problems, a kind of magnetism bentonite composite was prepared by coprecipitation method, and H2O2/UV process was attempted to regenerate the spent composite. The results showed that the composite still has high adsorption performance for cationic dye methylene blue (MB), and the introduction of magnetite can achieve rapid solid-liquid seperation of composite in the external magnetic field. For the spent composite, its adsorption performance could be recovered by H2O2/UV process. The recovery effect is directly related to the dosage of hydrogen peroxide. In this study, as the dosage of hydrogen peroxide was 3% (volume ratio), the adsorption efficiency of spent composite for MB could almost return to its initial level after 3h regeneration. This research is of great significance to improve the utilization of bentonite adsorbent in water treatment engineering, and can also provide technical reference for the recycle and regeneration of other adsorbent materials.
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Kumaseh, Max R., Luther Latumakulita, and Nelson Nainggolan. "SEGMENTASI CITRA DIGITAL IKAN MENGGUNAKAN METODE THRESHOLDING." JURNAL ILMIAH SAINS 13, no. 1 (May 17, 2013): 74. http://dx.doi.org/10.35799/jis.13.1.2013.2057.
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SEGMENTASI CITRA DIGITAL IKAN MENGGUNAKAN METODE THRESHOLDINGABSTRAK Untuk mengenal jenis-jenis ikan berdasarkan ciri-cirinya, telah dibuat suatu sistem untuk memisahkan objek mata ikan menggunakan metode thresholding. Prosesnya dimulai dengan menginput citra digital ikan, selanjutnya dikonversi ke citra grayscale. Kemudian dilakukan proses segmentasi terhadap citra grayscale. Selanjutnya, dipilih hasil segmentasi dan ditandai dengan proses deteksi tepi menggunakan operator Canny yang dipertajam dengan proses dilasi. Proses terakhir adalah membuat plot contour terhadap hasil proses dilasi dan citra grayscale. Hasil segmentasi berhasil memisahkan objek mata ikan dengan menggunakan metode thresholding local. Keseluruhan proses ini dilakukan dengan menggunakan MATLAB R2012a. Kata kunci : Mata Ikan, Segmentasi Citra, Thresholding DIGITAL FISH IMAGE SEGMENTATION BY THRESHOLDING METHOD ABSTRACT A system of fish eyelets seperation has been conducted to identify types of fish acording to their characteristics, by using thresholding method. The process start by inserting digital fish image then convert it to grayscale image. Next step is to process segmentation the grayscale image. Choosed the segmentation result then marked it by edge detection process using Canny operation which has been sharpened by dilation process. The last step is to make contour plot to dilation result and grayscale image. The result of the segmentation shows that the fish eyelets can be separated using local thresholding method. The whole process is conducted by using MATLAB R2012a. Keywords : Fish Eyelets, Segmentation Image, Thresholding
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Li, Jie, Jun Wang, Bao Wei Li, and Lei Wang. "The Study on Microwave Magnetic Roasting Plus Magnetic Seperation and Acid Pickling to Enrich Nb of Low-Grade Niobium Minerals." Applied Mechanics and Materials 182-183 (June 2012): 17–22. http://dx.doi.org/10.4028/www.scientific.net/amm.182-183.17.
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In present article, the low intensity magnetic separation process was studied for the low-grade niobium minerals by microwave magnetic roasting. The influence of magnetic density, particle size of grinding and dispersant addition on the magnetic separation effect of sinter ore with the best magnetisability was investigated emphatically. The results show that the iron recovery was decreased and the iron grade increased gradually with decreasing the magnetic density and particle size of grinding. The magnetic separation result of sinter ore was optimal under the magnetic density of 80KA / m and the grinding grain-size of 33 μm. Fine grinding can effectively make Fe separated from Nb, especially when the dispersant(industrial alcohol) was used in the process of magnetic separation , resulting in the improvement of the grade of iron from 57.2% to 60.5% and enrichment of Nb in the tailing ore(the grade of Nb was 5.01%). After the acid pickling of tailing ore containing Nb, the grade of Nb in the extract was improved to 12.36%, which was enriched four times more than that of low-grade niobium ore before microwave magnetic roasting.
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Yesildal, Fatih, Muhittin Serdar, and Taner Ozgurtas. "A practical ID-LC-MS/MS method for the most commonly analyzed steroid hormones in clinical laboratories." Turkish Journal of Biochemistry 44, no. 2 (August 21, 2018): 130–41. http://dx.doi.org/10.1515/tjb-2018-0214.
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Abstract Background Analysis of steroid hormones rapidly and reliably remains a challenge in clinical laboratories as this plays an important role in evaluation of many endocrine disorders. The aim of this study was to create a steroid profiling panel by using a liquid chromatography tandem mass spectrometry (LC-MS/MS) method which was composed of the most commonly analyzed steroid hormones in clinical laboratories. Materials and methods Protein precipitation was performed for sample preparation. Ultra performance liquid chromatography (UPLC) system and an analytical column with C18 selectivity was chosen for chromatographic seperation. Atmospheric pressure chemical ionization (APCI) ion source was preferred for ionization, and tandem MS with triple quadrupole was used. MS scan was performed using the selected reaction monitoring mode in positive polarity. During the method validation process, test performance was evaluated for each steroid hormone, and 40 serum samples were used for method comparison with immunoassays available in our core laboratory. Results An isotope dilution (ID)-LC-MS/MS method was developed, in which 13 steroids can be analyzed in the same run. Test performance was quite good for the 11 steroids (cortisol, DHEA, DHEAS, total testosterone, progesterone, androstenedione, 11-deoxycortisol, cortisone, corticosterone and dihydrotestosterone) while estradiol and aldosterone performance was suboptimal considering the precision and trueness. Conclusion This ID-LC-MS/MS method would be useful in clinical laboratories, especially for the immunoassays having insufficient test performance and when checking for interferences in available immunoassays.
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Knijn, H. M., A. C. J. Frijters, J. E. Roelfzema, M. Bakker, R. Lenz, and J. S. Merton. "369 EFFECT OF HOLDING TIME OF RAW HOLSTEIN FRIESIAN BULL EJACULATES BEFORE SEXING ON NON-RETURN RATES AFTER 56 DAYS." Reproduction, Fertility and Development 22, no. 1 (2010): 341. http://dx.doi.org/10.1071/rdv22n1ab369.
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Flow cytometric seperation of X- and Y-chromosme-bearing sperm is the only reliable technique that has been used succesfully for commercialization of sexed semen in the dairy industry. However, sperm sexing results in lower fertility compared to conventional semen. Due to logistics like the distance between bull station and sorting laboratory, the number of flow cytometers, and the time needed for the sorting process itself, the holding time between ejaculation and freezing of sex-sorted semen is variable. This holding time could influence the fertility of sex-sorted semen. The aim of this study was to evaluate the effect of different holding times before sexing on the non-return rates on Day 56 post insemination (NRR56). Following collection, raw ejaculates were transported at room temperature (19°C) from two semen collection centers to the central sorting laboratory. Within 2-4 h after collection, volume, sperm concentration and quality of the ejaculates were determined. When accepted, aliquots of 1 mL of semen were stained every 45-60 min for 2 h. Subsequently, sexing was performed according to procedures described previously, using MoFlo SX™ sperm sorters (Garner DL and Seidel GE 2008 Theriogenology 69 : 886-895). Each aliquot of 1 mL semen was sorted for 45-60 min. Four flow sorters were used, so not more than 4 aliquots could be processed simultaneously. After sorting 3-4 h, semen was pooled and a charge number was assigned to this fraction of the ejaculate (called a freezerun). This procedure was done a maximum of 3 times. The time between collection of the raw ejaculate and freezing of the semen was 7-10 h for freezerun 1, 10-14 h for freezerun 2, and 13-18 h for freezerun 3. From September 2007 to April 2009, a total of 16,523 inseminations with sexed semen from 43 different Holstein bulls were performed for which non-return rates at 56 days (NRR 56) were recorded. There were no significant differences in NRR56 between the 3 freezeruns (t-test) (Table 1). The results shown in this study suggest that raw Holstein semen can be held at room temperature for up to 13-18 h prior to sexing and freezing without an effect on NRR56. This study did not indicate what the maximum holding time prior to sexing and freezing would be before resulting in a fertility decline. Table 1.Number of records and NRR56 for different freezeruns
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Arslan, Dilek Nural, and Şafak Dağhan. "A qualitative research on the acculturation strategies, risk factors and health perceptions of Syrian asylum seekers." Health Sciences Quarterly 2, no. 2 (April 24, 2022): 55–72. http://dx.doi.org/10.26900/hsq.2.2.01.
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The internal turmoil, that broke out in Syria, started a mass migration movement towards Turkey in 2011. This migration movement, which proved to be an important social phenomenon, individuals from many different cultures have experienced coexistence for compulsory reasons. On top of that experience they were subjected to, the addition of a highly complicated process of acculturation, and the risk factors which immigrants and ethnic minority groups faced caused them to classify as vulnurable regarding health. The aim of this study is to assess how the preferred acculturation strategy of Syrian asylum seekers, who found themselves living along with different cultures, their negative or positive experiences and the risk factors they face affects their health, and health perceptions. The research was designed as a phenomenological research. In-depth interviews were conducted with 24 participants, who were included in the study, using the purposive sampling strategies, homogeneous case sampling and criterion sampling technique. In addition to the usage of code book obtained from the literary works related to the field using the deductive method, the data recorded by observing and the notes from interviews were reduced to themes, categories and codes using the inductive method. The study is grouped under three main themes, namely acculturation strategy of Syrian asylum seekers, risk factors affecting the healths of Syrian asylum seekers and health perception of Syrian asylum seekers. Statistical analysis of the data was carried out by using descriptive analysis and content analysis provided in the MAXQDA 2020 pro-package program. Although the participants heavily express their opinions in favor of seperationg strategy, which is one of the acculturation strategies, this is followed by an integration strategy. Furthermore, the participants were observed to have been subjected to discrimination and rejection, and in this process, facing risk factors mainly social, psychological, environmental, physical and barriers affecting healthcare procurement. Multiple relational analysis show that an intense relationship was found between the participants who preferred the separatist strategy and the risk factors affecting their health. It was observed that the participants who reported good health perception before migrating; due to the most reported social risk factor, economic barriers, reported negative health perception after migrating. The majority of participants who preferred the integration strategy reported good health perception both before and after migration.
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Victor-Oji, C. O., U. J. Chukwu, and O. Akaranta. "Synthesis and Evaluation of Ethanolamine-Cashew Nut Shell Liquid Products as Crude Oil Emulsion Breakers." Asian Journal of Applied Chemistry Research, February 28, 2020, 1–33. http://dx.doi.org/10.9734/ajacr/2019/v4i430122.
Повний текст джерелаАнотація:
Cashew Nut Shell Liquid (CNSL), a natural phenolic liquid, was extracted from cashew nut shells using acetone and derivatized using Ethanolamine (EA) and Diethanolamine (DEA) in varying molar ratios via a one-pot process into anacardic acid-based ethanolamine esters and evaluated for use as crude oil emulsion breakers. The CNSL extract was characterized for its physico-chemical properties, FTIR spectral analysis for CNSL and the derivatives confirmed its chemical modification. Medium heavy crude and seawater sampled and characterized with ASTM standards were used in producing laboratory-simulated crude oil emulsions at varying crude oil: water mixing ratios of 90:10, 70:30 and 50:50. Performance of the anacardic acid-based CNSL extract and derivatives as demulsifiers were evaluated based on variation in dosage (10 ppm – 50 ppm), water content (10%, 30% and 50%), and solvent types (xylene and butanol, BuOH) at 60℃ within a 3-hr period via bottle testing. The performance of effective demulsifier formulations were compared with a commercial demulsifier, Phase Treat-4633, PT-4633, under similar conditions. Results obtained showed that water separation increases with demulsifier concentration and emulsion water content respectively, though water seperation varied among the demulsifiers as concentration and water content increased. PT-4633 in butanol achieved efficient water separation with an optimal seperation (100%) observed after 5 minutes at 40 ppm and 50 ppm, 50% and 60℃. In conclusion, the evaluated ethanolamine-CNSL products possess emulsion breaking potential using BuOH as solvent at shorter times. This behaviour may be due to the synergetic effect of BuOH as a solvent, thus, BuOH should be considered as solvent substitute for xylene due to low cost and toxicity levels, unlike xylene which is toxic and expensive.
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Zou, Ying, Hongmei Zheng, Yue Ning, Yang Yang, Qiuyuan Wen, and Songqing Fan. "New insights into the important roles of phase seperation in the targeted therapy of lung cancer." Cell & Bioscience 13, no. 1 (August 14, 2023). http://dx.doi.org/10.1186/s13578-023-01101-8.
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AbstractLung cancer is a complex and heterogeneous disease characterized by abnormal growth and proliferation of lung cells. It is the leading cause of cancer-related deaths worldwide, accounting for approximately 18% of all cancer deaths. In recent years, targeted therapy has emerged as a promising approach to treat lung cancer, which involves the use of drugs that selectively target specific molecules or signaling pathways that are critical for the growth and survival of cancer cells. Liquid–liquid phase separation (LLPS) is a fundamental biological process that occurs when proteins and other biomolecules separate into distinct liquid phases in cells. LLPS is essential for various cellular functions, including the formation of membraneless organelles, the regulation of gene expression, and the response to stress and other stimuli. Recent studies have shown that LLPS plays a crucial role in targeted therapy of lung cancer, including the sequestration of oncogenic proteins and the development of LLPS-based drug delivery systems. Understanding the mechanisms of LLPS in these processes could provide insights into new therapeutic strategies to overcome drug resistance in lung cancer cells.
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"5192422 Oil shale benefication process using a spiral seperator." Minerals Engineering 6, no. 8-10 (August 1993): 1109. http://dx.doi.org/10.1016/0892-6875(93)90085-2.
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Tran Dinh, Binh, and Loan Tran Thanh. "SUGGESTION FOR DIFFERENTIAL DIAGNOSIS OF SOME DISEASES IN SEPERATING/SCREENING PROCESS FOR SUSPECTED PATIENTS WITH COVID-19 AT HUE UNIVERSITY OF MEDICINE AND PHARMACY HOSPITAL." Journal of Medicine and Pharmacy, April 2020, 14–19. http://dx.doi.org/10.34071/jmp.2020.2.2.
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Separating/screening patients to avoid SAR-CoV-2 infections from suspected patients with COVID-19 entering the clinics and hospitals is extremely important. However, many other disease groups also have clinical signs and epidemiological factors that are quite similar to COVID-19. Therefore, carefully screening examination and differentiation are necessary to avoid an increasing number of suspected cases, by which isolation monitoring and identified diagnostic must be performed, not to mention that it will slow down their main disease diagnostic and treatment. These suggestions hopefully contribute to improving the separating/screening process in clinics and emergency rooms when COVID-19 is spreading and causing disease around the world Key words: separating, screening, COVID-19, SARS-CoV-2, chest CT scanner