Temat: Rice - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Cadmium Removal from Contaminated Soil by Electro-Kinetic Method
Autorzy:: Hawal, Laith Hamdan
Al-Sulttani, Ali Omran
Hamza, Jinan N.
Powiązania:: https://bibliotekanauki.pl/articles/2202315.pdf
Data publikacji:: 2023
Wydawca:: Polskie Towarzystwo Inżynierii Ekologicznej
Tematy:: electrokinetic method
cadmium
soil
removal rate
rice husk
Opis:: For this study, an electro kinetic method used to eliminate cadmium from the polluted soil. This method is useful at low permeability medium. Several experiments were conducted with variable operating circumstances, using different pH purging solutions. Rice husks were used in this work as an adsorbent medium available and free of charge to counteract the reverse osmosis process that occurs and affects the work efficiency. The final results after the end of the practical experiments of this process showed that the percentages of the removal process began to increase after the pH gradually decreases. The pH of the solution for the three experiments conducted was 3, 6 and 9, respectively. The best removal rate was 68% in this process at pH 3 ; when compared with the second and third tests at pH 6 and 9, the removal ratios were 58% and 51.5%, respectively. It was discovered that the cadmium removal rate began to decrease along with voltage. At 30 volts the removal rates were 68%, whereas 20 volts they were 66%. Rice husks have been shown to be an effective adsorbent for counteracting reverse osmosis. Therefore, it can be successfully used as an adsorbent medium.
Źródło:: Journal of Ecological Engineering; 2023, 24, 1; 79--86
2299-8993
Pojawia się w:: Journal of Ecological Engineering
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: Characteristics of Charcoal Briquettes from Rice Husk Waste with Compaction Pressure Variations as an Alternative Fuel
Autorzy:: Yusuf, Mega Ayu
Witdarko, Yus
Parjono
Pamungkas, Wiyan Afriyanto
Suryadi
Powiązania:: https://bibliotekanauki.pl/articles/24201708.pdf
Data publikacji:: 2023
Wydawca:: Polskie Towarzystwo Inżynierii Ekologicznej
Tematy:: alternative fuel
briquette
compacting pressure
rice husk
quality of briquette
Opis:: The availability of increasingly scarce fossil fuels causes high fuel prices, so alternative fuels are needed to reduce the use of fossil energy. Briquettes are an alternative energy that can be made from biomass, one of which is rice husk. The quality of the briquettes was determined by the material, the type of adhesive, and the strength of the briquette pressure. The briquette pressure will affect the mechanical properties of the briquettes such as density, stability and durability of the briquettes. This study aimed to determine the features of rice husk charcoal briquettes with variations in compacting pressure as an alternative fuel. The compaction pressure used in this study was 3 tons, 5 tons, and 7 tons. In general, the briquettes produced from this study can be used as an alternative energy source in terms of the resulting combustion temperature which ranges from more than 300–500 °C.The combustion rate obtained shows that the briquettes with a compaction pressure of 3 tons have a high combustion rate value of 0.553 g/minute, while the briquettes with a compaction pressure of 5 tons and 7 tons have a low combustion rate value of 4.20 g/min and 0.418 g/minute respectively. Therefore, the best quality briquettes from this study were the briquettes with a compaction pressure of 5 tons and 7 tons, so that they could be considered as alternative energy for wood and fossil fuels for energy needs in the domestic industry.
Źródło:: Journal of Ecological Engineering; 2023, 24, 4; 237--243
2299-8993
Pojawia się w:: Journal of Ecological Engineering
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 3.

Tytuł:: Characteristics of high-density fibreboard produced with the use of rice starch as a binder
Autorzy:: Dasiewicz, Julia
Kowaluk, Grzegorz
Powiązania:: https://bibliotekanauki.pl/articles/31340676.pdf
Data publikacji:: 2023
Wydawca:: Szkoła Główna Gospodarstwa Wiejskiego w Warszawie. Wydawnictwo Szkoły Głównej Gospodarstwa Wiejskiego w Warszawie
Tematy:: ibreboard
HDF
rice starch
binder
płyta pilśniowa
skrobia ryżowa
spoiwo
Opis:: Characteristics of high-density fibreboard produced with the use of rice starch as a binder. The adhesives used as binders in the boards are not biodegradable, and their formaldehyde is toxic. Nowadays it is very important to take care of the environment. There are a lot of biodegradable products that as well as the current board binders can meet good mechanical and physical properties and at the same time not harm the environment. Therefore in this project, the study aimed to investigate the possibility of producing dry-formed fibreboards using rice starch as a binder. The research involved the production of boards with a mass proportion of rice starch 0%, 10%, 12%, 15%, and 20% (when referred to as totally dry wood fibre mass) and to study of their selected physical and mechanical properties. The results proved that rice starch can be used as a binding agent if we choose the right amount of starch so that it can improve some mechanical and physical properties. Very good properties came out for the determination of modulus of elasticity in bending and of bending strength and for screw withdrawal resistance with a high rice binder content, but on the other hand for internal bonds, the high rice content reduced the properties. For some studies, rice flour improved properties but not enough to comply with standards as was the case with the swelling of the thickness.
: Charakterystyka płyt pilśniowych o wysokiej gęstości produkowanych przy użyciu skrobi ryżowej jako spoiwa. Kleje stosowane jako spoiwa w płytach nie ulegają biodegradacji, a zawarty w nich formaldehyd jest toksyczny. W dzisiejszych czasach bardzo ważne jest dbanie o środowisko. Istnieje wiele biodegradowalnych produktów, które podobnie jak obecne spoiwa do płyt mogą spełniać dobre właściwości mechaniczne i fizyczne, a jednocześnie nie szkodzić środowisku. W związku z tym w niniejszym projekcie celem badań było określenie możliwości tworzenia płyt pilśniowych formowanych na sucho przy użyciu skrobi ryżowej jako spoiwa. Badania obejmowały produkcję płyt z masowym udziałem skrobi ryżowej 0%, 10%, 12%, 15% i 20% względem masy zupełnie suchych włókien oraz badanie ich właściwości fizycznych i mechanicznych. Wyniki dowiodły, że skrobia ryżowa może być stosowana jako środek wiążący, jeśli wybierzemy odpowiednią ilość skrobi, aby poprawić niektóre właściwości mechaniczne i fizyczne. Bardzo dobre właściwości uzyskano w przypadku określania modułu sprężystości przy zginaniu i wytrzymałości na zginanie oraz odporności na wyciąganie śruby przy wysokiej zawartości spoiwa ryżowego, ale z drugiej strony w przypadku spoin wewnętrznych wysoka zawartość ryżu obniżyła właściwości. W niektórych badaniach mąka ryżowa poprawiła właściwości, ale nie na tyle, aby spełnić wymagania normy, jak miało to miejsce w przypadku spęcznienia na grubość.
Źródło:: Annals of Warsaw University of Life Sciences - SGGW. Forestry and Wood Technology; 2023, 122; 169-181
1898-5912
Pojawia się w:: Annals of Warsaw University of Life Sciences - SGGW. Forestry and Wood Technology
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 4.

Tytuł:: Development of Criteria for High-Technology Rice and Corn Suitability Assessment – A Case Study in the An Giang province, Viet Nam
Autorzy:: Nguyen, Phan Chi
Vu, Pham Thanh
Minh, Vo Quang
Tri, Le Quang
Khuong, Nguyen Quoc
Powiązania:: https://bibliotekanauki.pl/articles/2202337.pdf
Data publikacji:: 2023
Wydawca:: Polskie Towarzystwo Inżynierii Ekologicznej
Tematy:: An Giang province
corn production
high-tech
multi-criteria
rice production
Opis:: This study identified the zones likely to apply high-tech rice and corn technology based on criteria from different expert groups. Based on the resulting limiting factor for ability suitable, structural and non-structural solutions have been proposed to improve the suitability of rice and corn with high-tech applications. It was the basic foundation to support strategic planners in agricultural development sustainability in the future. High technology application in agricultural production is an inevitable trend in today’s society. In Vietnam, high-tech agricultural production has developed for a long time in high-tech industrial park production. However, in agricultural production, applying high technology with mass production has yet to have any specific regulations on criteria for implementation in production. On that basis, the research aimed at determining the requirements for developing high-tech agriculture with mass production. Therefore, the predefined criteria for primary and secondary data were developed, which were used for the data collected from farmers, managers, and scientists. Thereby, a production hierarchy of adaptations for rice and corn was built based on consultation results with the farmers and scientists and published studies. The results also made three land adaptation zones apply high technology in mass production for these two crops. The areas suitable for producing rice and corn with high technology applications were marginally suitable, and not suitable prevailed. No region in the An Giang province has a strong potential for cultivating high-tech rice and corn. This result also established adaptive upgrading solutions for applying high technology in the future, which helped improve agricultural production efficiency.
Źródło:: Journal of Ecological Engineering; 2023, 24, 1; 239--247
2299-8993
Pojawia się w:: Journal of Ecological Engineering
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 5.

Tytuł:: Heavy Metals Contamination of Local and Imported Rice in Semarang, Central Java, Indonesia
Autorzy:: Wahyuningsih, Nur Endah
Setiawan, Henry
Nabiha, Puteri Inandin
Kartasurya, Martha Irene
Azam, Mahalul
Powiązania:: https://bibliotekanauki.pl/articles/27323834.pdf
Data publikacji:: 2023
Wydawca:: Polskie Towarzystwo Inżynierii Ekologicznej
Tematy:: pH
heavy metals
rice
local
import
Opis:: This study defined the heavy metal concentration in rice, a commonly consumed staple food in Indonesia that is domestically produced and also imported from other countries due to its high demand. A total of six rice samples, comprising of four domestic and two foreign were randomly taken from Semarang stores and analyzed using the Atomic Absorbance Spectrometer (AAS). The laboratory results revealed that three varieties of rice, two from Indonesia (MW and PW; 0.561 and 0.456 mg/kg, each), and one from the United States (B; 0.307 mg/kg), exceeded the Indonesian dietary standard for lead (Pb) (SNI). Furthermore, the concentration of chromium (Cr) in two rice that are imported (B, 0.241 mg/kg and J, 0.723 mg/kg) were greater than the 0.2 mg/kg threshold established by the Chinese government. However, all samples had acceptable levels of As and Hg, and none had detectable levels of Cd. In terms of pH levels, domestically produced rice had a wider range (3.88–5.78) compared to imported rice (4.96–5.68). Although locally grown and imported rice had acceptable levels of LCR, only one local rice sample and two imported rice samples exceeded the Target Hazard Quotient (THQ) as well as Hazard Index (HI) values. In conclusion, consuming heavy metals contamination rice on a regular basis poses carcinogenic as well as non-carcinogenic health risks.
Źródło:: Journal of Ecological Engineering; 2023, 24, 7; 49--60
2299-8993
Pojawia się w:: Journal of Ecological Engineering
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 6.

Tytuł:: Influence of Sieve Size on Calorific Value and Proximate Properties of Bio-Briquette Composites
Autorzy:: Aliah, Hasniah
Winarti, Indri
Iman, Ryan Nur
Setiawan, Andhy
Safarina, Rizky
Sawitri, Asti
Powiązania:: https://bibliotekanauki.pl/articles/27323815.pdf
Data publikacji:: 2023
Wydawca:: Polskie Towarzystwo Inżynierii Ekologicznej
Tematy:: bio-briquette
rice husk
coffee shell
calorific value
fixed carbon
Opis:: This work aimed to observe the influence of calorific value and proximate properties in the fabrication of rice husk (RH) and coffee shell (CS) briquettes composite. Rice and coffee husks contain cellulose, hemicellulose, and lignin. These contents are necessary for the adhesive to bind the briquette (amylose and amylopectin). The raw materials were carbonized at 400 °C for 60 minutes. Variations of sieving size (60, 80, and 100 mesh) and the composition ratio of raw material CS:RH were reviewed to study their effect. Tests of density, moisture content, volatile matter content, ash content, fixed carbon content, shatter index, combustion rate, and calorific value were carried out to determine the optimum composition. The results were obtained with the best quality at a particle size of 60 mesh with the highest calorific value of 17.422 MJ/kg. It showed that the briquettes have good quality and are comparable with the standard briquette.
Źródło:: Journal of Ecological Engineering; 2023, 24, 7; 25--34
2299-8993
Pojawia się w:: Journal of Ecological Engineering
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 7.

Tytuł:: Preparing Shrimp Shell-Derived Chitosan with Rice Husk-Derived Biochar for Efficient Safranin O Removal from Aqueous Solution
Autorzy:: Phuong, Do Thi My
Thao, Nguyen Thi Thanh
Loc, Nguyen Xuan
Powiązania:: https://bibliotekanauki.pl/articles/2202335.pdf
Data publikacji:: 2023
Wydawca:: Polskie Towarzystwo Inżynierii Ekologicznej
Tematy:: adsorption
biochar
chitosan
rice husk
Safranin O
shrimp shell
Opis:: In this study, the shrimp shell-derived chitosan was coated onto rice husk-derived biochar to form chitosan/biochar bio-composite beads. The physicochemical properties of biochar (BC) and chitosan/biochar beads (CS@BC) were characterized by BET, SEM-EDX, FTIR, and pHpzc analyses, which were then tested for their capacity to remove Safranin O (SO) from water. In kinetics, the pseudo-second-order model was found to well represent experimental data, indicating the adsorption was mainly a chemical process. The intra-particle diffusion model was not the sole rate-limiting step, because the results did not pass through the origin. In isotherms, both the Langmuir and Freundlich models described well the equilibrium adsorption data. The CS@BC adsorbent showed adsorption capacity at 77.94 mg/g for SO, which is higher than BC adsorbent with 62.25 mg/g (experimental conditions: pH ~ 7.0, dosage = 0.2 g, contact time = 240 min, and temperature = 298 K). The findings revealed that the biochar-loaded chitosan can improve the adsorption capacity of SO. It is predicted that the enhancement in the functional groups (i.e., -NH2 and -OH groups) of CS@BC could contribute to the electrostatic interactions and the complexation between SO and CS@BC, thereby enhancing the Safranin O adsorption from water.
Źródło:: Journal of Ecological Engineering; 2023, 24, 1; 248--259
2299-8993
Pojawia się w:: Journal of Ecological Engineering
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 8.

Tytuł:: Properties of Ni60/SiO2 Coating Prepared by the Pyrolysis Products of Rice Husk
Autorzy:: Wei, Chunxue
Li, Hongbing
Powiązania:: https://bibliotekanauki.pl/articles/2203726.pdf
Data publikacji:: 2023
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: Ni60/SiO2
coating
rice husk
hardness
wear
Opis:: Surface coating technology, as the main technology to improve the fatigue life of mechanical systems, has been well applied in mechanical equipment. The present study aimed to explore low-cost surface coating preparation technology using inexpensive rice husk as the research object, and the pyrolysis process behavior of rice husk was analyzed. The Ni60/SiO2 coating was prepared on the surface of the 45# steel substrate using the pyrolysis product SiO2 fiber as the reinforcing phase and supersonic plasma-spraying equipment. The results showed no defects such as cracks, pores, and inclusions in the prepared coating. The nanohardness of the Ni60/SiO2 coating reached 6506 μN, and the average friction coefficient reached 0.42. In the friction-and-wear experiment, the Ni60/SiO2 coating was manifested as an abrasive wear mechanism.
Źródło:: Archives of Metallurgy and Materials; 2023, 68, 1; 37--42
1733-3490
Pojawia się w:: Archives of Metallurgy and Materials
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 9.

Tytuł:: Seed bio-priming with phosphate-solubilizing bacteria strains to improve rice (Oryza sativa L. var. FARO 44) growth under ferruginous ultisol conditions
Autorzy:: Musa, Saheed I.
Ikhajiagbe, Beckley
Powiązania:: https://bibliotekanauki.pl/articles/16688832.pdf
Data publikacji:: 2023
Wydawca:: Polska Akademia Nauk. Czasopisma i Monografie PAN
Tematy:: bio-priming
ferruginous soil
phosphate-solubilizing bacteria
plant-growth-promoting capabilities
sustainable agriculture
rice
scanning electron microscopy
Opis:: This study investigated the possibility of using phosphate-solubilizing bacteria (PSB) with plant-growth-promoting (PGP) capabilities to improve the growth properties of rice plants under ferruginous ultisol (FU) conditions through bio-priming. The following PSB with PGP properties were used in this study: Bacillus cereus strain GGBSU 1, Proteus mirabilis strain TL14-1, and Klebsiella variicola strain AUH-KAM-9, which were previously isolated and characterized based on 16S rRNA gene sequencing. Biosafety analysis of the PSB isolates was conducted using blood agar. The rice seeds were then bio primed with the PSB for 3, 12, and 24 h and then sown in a composite FU soil sample. Differences in germinat ion bioassay were investigated 15 weeks after bio-priming using scanning electron microscopy (SEM), morphology, physiology, and biomass parameters. The composite FU soil used in this study had high pH, low bioavailable phosphorus, low water-holding capacity, and high iron levels, which resulted in low growth properties of rice seeds without bio-priming in the FU soil. Germination parameters were improved in seeds bio primed with the PSB, especially after 12 h of priming, compared with seeds without priming. SEM showed higher bacterial colonization in bio primed seeds. Bio-priming of rice seeds with the studied PSB under FU soil conditions significantly improved seed microbiome, rhizocolonization, and soil nutrient properties, thereby enhancing the growth properties of rice. This indicated the ability of PSB to solubilize and mineralize soil phosphate and improve phosphorus availability and soil properties for optimum plant usage in phosphate-stressed and iron toxic soils.
Źródło:: BioTechnologia. Journal of Biotechnology Computational Biology and Bionanotechnology; 2023, 104, 1; 33-51
0860-7796
Pojawia się w:: BioTechnologia. Journal of Biotechnology Computational Biology and Bionanotechnology
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 10.

Tytuł:: Study of Zeolite Phase Made from Rice Husk Ash and Sidrap Clay
Autorzy:: Armayani, M.
Mansur, Musdalifa
Asra, Reza
Irwan, Muh
Ramadhanty, Dhian
Subaer, Subaer
Abdullah, Mohd Mustafa Al Bakri
Aziz, Ikmal Hakem A.
Jeż, Bartłomiej
Nabiałek, Marcin
Powiązania:: https://bibliotekanauki.pl/articles/2203746.pdf
Data publikacji:: 2023
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: autoclave
clay
rice husk ash
zeolite
Opis:: Zeolite has been successfully synthesized from clay and rice husk ash in the form of powder by using the hydrothermal method with variations in chemical compositions of alkaline solution and the amount of rice husk ash. The clay raw material was obtained from the Sidrap area of South Sulawesi and rice husk ash is obtained from the burning pile of rice husks. Sidrap clay and rice husk ash were activated using an alkaline solution of NaOH and varied rice husk ash and the addition of AlCl3. The addition of AlCl3, an alkaline solution of NaOH and H2O was used in the amount of 25.5 grams and variations of rice husk ash were 2.5 grams and 6.5 grams. Meanwhile, without the addition of AlCl3, an alkaline solution of NaOH and H2O was used for 20.5 grams and variations of rice husk ash from 2.5 grams and 6.5 grams. Then the mixture was then put into an autoclave with a temperature of 100°C for 3 hours. The basic material used in the manufacture of zeolite is carried out by X-ray Fluorescence (XRF) characterization to determine the constituent elements of basic material, which showed the content of SiO2 was 45.80 wt% in the clay and 93.40% in the rice husk ash. The crystalline structure of the zeolite formed was characterized by X-Ray Diffraction (XRD). It was found the resulting zeolite were identified as Zeolite-Y, Hydrosodalite, and ZSM-5. The microstructure properties of the resulting zeolite were determined by using Scanning Electron Microscopy (SEM).
Źródło:: Archives of Metallurgy and Materials; 2023, 68, 1; 269--274
1733-3490
Pojawia się w:: Archives of Metallurgy and Materials
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 11.

Tytuł:: Wybrane aspekty wspomagania leczenia zaburzeń lipidowych
The selected aspects of supporting the treatment of lipid disorders
Autorzy:: Citko, Anna
Powiązania:: https://bibliotekanauki.pl/articles/3200689.pdf
Data publikacji:: 2023-08-18
Wydawca:: Wydawnictwo Naukowe Medyk sp. z o.o.
Tematy:: zaburzenia lipidowe
czerwony ryż drożdżowy
standaryzowana kompozycja polifenoli z bergamoty
lipid disorders
red east rice
standardized composition of bergamot polyphenols
Opis:: Zaburzenia lipidowe są rozpowszechnionym czynnikiem ryzyka sercowo-naczyniowego. Dlatego ich zwalczanie stanowi jedno z głównych wyzwań w zakresie zdrowia publicznego. Istotną rolę odgrywają w tym lekarze rodzinni. Interesującą możliwością leczenia zaburzeń gospodarki lipidowej są dostępne w Polsce bez recepty ekstrakty ryżu sfermentowanego z udziałem drożdży Monascus purpureus, nazywane również czerwonym ryżem drożdżowym (RYR, ang. red yeast rice), a także standaryzowana kompozycja polifenoli z bergamoty (BPF, ang. bergamot polypehnolic fraction). Obok korzystnego wpływu na parametry gospodarki lipidowej wykazują one liczne działania pozasercowe. Do grupy osób, dla których są przeznaczone te preparaty, należą m.in. pacjenci z grupy niskiego (poniżej 1% w skali SCORE) lub umiarkowanego (1–4% w skali SCORE) ryzyka sercowo-naczyniowego. BPF można także zastosować u pacjentów nieakceptujących terapii statyną, u kategorycznie odmawiających jej stosowania; u chorych nietolerujących statyn; u osób, u których nie można zintensyfikować terapii statyną, z zespołem metabolicznym i zaburzeniami gospodarki węglowodanowej na czczo lub nieprawidłową tolerancją glukozy; u pacjentów z zespołem metabolicznym i chorobą stłuszczeniową wątroby. RYR oraz BPF mogą być bezpiecznie stosowane u pacjentów z mialgią statynową. Zarówno RYR, jak i BPF cechuje wysokie bezpieczeństwo stosowania.
An interesting option for the treatment of lipid metabolism disorders are extracts of fermented rice with Monascus purpureus yeast, also known as red yeast rice (RYR), as well as a standardized composition of bergamot polyphenols (BPF) available in Poland without a prescription. fraction) In addition to the beneficial effect on the parameters of lipid metabolism, they have numerous non-cardiac effects. The group of people for whom these preparations are intended includes, among others, patients from the group of low (below 1% on the SCORE scale) or moderate (1-4% on the SCORE scale) cardiovascular risk. BPF can also be used in patients who do not accept statin therapy, in categorically refusing its use; statin intolerant patients; in people who cannot be intensified with statin therapy, with metabolic syndrome and impaired fasting carbohydrate metabolism or impaired glucose tolerance; in patients with metabolic syndrome and fatty liver disease. RYR and BPF can be safely used in patients with statin myalgia. Both RYR and BPF are characterized by high safety of use.
Źródło:: Lek w Polsce; 2023, 386, 7; 31-36
2353-8597
Pojawia się w:: Lek w Polsce
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 12.

Tytuł:: Analytical performance analysis of the M2M wireless link with an antenna selection system over interference limited dissimilar composite fading environments
Autorzy:: Ðošić, Danijel
Milić, Dejan
Kontrec, Nataša
Stefanović, Časlav
Milosavljević, Srðan
Stefanović, Dušan M.
Powiązania:: https://bibliotekanauki.pl/articles/2172127.pdf
Data publikacji:: 2022
Wydawca:: Uniwersytet Zielonogórski. Oficyna Wydawnicza
Tematy:: mobile to mobile communication
vehicle to vehicle communication
Nakagami-m fading
Rice fading
probability density function
cumulative density function
urządzenia mobilne
komunikacja między pojazdami
funkcja gęstości prawdopodobieństwa
Opis:: This paper considers direct mobile-to-mobile (M2M) communications with a dual antenna selection (AS) system at a destination mobile node (DMN) in interference limited, dissimilar composite fading environments. In particular, we model dissimilar interference limited signals at the inputs of the dual branch AS system as (i) the ratio of two Nakagami-m (N) random variables (RVs) at the first branch and (ii) the ratio of two Rice RVs at the second branch, in order to account for non line-of-sight (NLOS) and line-of-sight (LOS) communications, respectively. Moreover, we assume variable powers of the desired as well as interference signals at the output of the DMN in order to account for the impact of shadowing. For the proposed model, we derive probability density functions, cumulative distribution functions, outage probabilities and average level crossing rates. The derived statistical results are evaluated for all the statistical measures considered and are graphically presented in order to provide insight into the impact of composite fading severities and LOS factors for the desired signal, as well as for the interference, on the system performances.
Źródło:: International Journal of Applied Mathematics and Computer Science; 2022, 32, 4; 569--582
1641-876X
2083-8492
Pojawia się w:: International Journal of Applied Mathematics and Computer Science
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 13.

Tytuł:: Cadmium Immobilization in the Rice – Paddy Soil with Biochar Additive
Autorzy:: Thi, Khac Vu
Lan, Phuong Dinh Thi
Hang, Nga Nguyen Thi
Thanh, Hoa Nguyen
Powiązania:: https://bibliotekanauki.pl/articles/2086382.pdf
Data publikacji:: 2022
Wydawca:: Polskie Towarzystwo Inżynierii Ekologicznej
Tematy:: Cd
cadmium
soil contamination
rice grain
cadmium accumulation
biochar
straw
Opis:: Cadmium (Cd) is toxic for humans, but its effects on the yield and quality of rice under contaminated irrigation conditions remain uncertain. In this study, paddy soils in the Red River Delta (Vietnam) were selected for experiments with the purpose of understanding the effects of Cd contaminated irrigation water on growth, yields, and grain Cd accumulation. In addition, biochar was produced from rice husk (BRH) and rice straw for preventing Cd infiltration into rice was also studied in this experiment. A field experiment was established with applicated BRH and straw into polluted paddy soil, as a result the Cd content in grains reduced significantly. The Cd contaminated soil was added to the BRH and rice straw (RS) with six ratios, including: (1) RS 2.5%, (2) BRH 2.5%, (3) RS-BRH: 1.25–1.25%, (4) RS 5.0%, (5) BRH 5.0%, (6) RS-BRH: 2.5–2.5%, (w:w). Besides, three content levels 0.01–0.05–0.5 mg/L of Cd in irrigation water were applied throughout crop season. The results showed that the Cd accumulation in rice was in the following order: roots > stems > seeds. With 3 contaminated irrigation levels which were applied, the Cd concentrations of 0.05 mg/L and 0.5 mg/L affected plant height and yield. However, the Cd content in grains under contaminated soil condition can be controlled from 82.47–83.94% by applying a BRH ratio from 2.5–5% (w:w).
Źródło:: Journal of Ecological Engineering; 2022, 23, 4; 85--95
2299-8993
Pojawia się w:: Journal of Ecological Engineering
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 14.

Tytuł:: Carbonized Sorbents of Shungite and Rice Husk for Purification of Petroleum Contaminated Soils
Autorzy:: Ongarbayev, Yerdos
Baigulbayeva, Moldir
Tileuberdi, Yerbol
Ualieva, Perizat
Abdieva, Gulzhamal
Powiązania:: https://bibliotekanauki.pl/articles/2086420.pdf
Data publikacji:: 2022
Wydawca:: Polskie Towarzystwo Inżynierii Ekologicznej
Tematy:: shungite
rice husk
carbonization
sorbent
petroleum contaminated soil
purification
bioremediation
Opis:: Contamination of soil and water with petroleum during its extraction, collection, transportation, storage and preparation occurs frequently, and purification of oil spills is one of the pressing environmental problems of oil producing organizations. There are a large number of methods for utilization oil spills. The sorption method in combination with bioremediation is capable of effectively purification of petroleum contaminated soils. The paper shows the possibility of using a carbonized mixture of shungite from the Koksu deposit (Kazakhstan) with rice husk as a sorbent and carrier of microorganism strains. The physicochemical properties and elemental composition, as well as the microstructure of carbonized samples were established. The maximum sorption capacity of carbonized sorbents when purifying the soil samples from oil from the Karazhanbas field was 1.86 g/g after 60 days. The carbonized samples with microorganism strains immobilized on them showed a degree of oil destruction reaching 90%.
Źródło:: Journal of Ecological Engineering; 2022, 23, 5; 16--25
2299-8993
Pojawia się w:: Journal of Ecological Engineering
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 15.

Tytuł:: Comparison between the Tensile, Water Absorption and Flammability Properties of Recycled High-Density Polyethylene/Rice Husk Composite from Twin-Screw Extruder and Heated Two-Roll Mill
Autorzy:: Salleh, Mohd Nazry
Aziz, Roslaili Abdul
Shan, Chen Ruey
Musa, Luqman
Razak, Mohd Fairul Sharin Abdul
Nabiałek, Marcin
Jeż, Bartłomiej
Powiązania:: https://bibliotekanauki.pl/articles/2106584.pdf
Data publikacji:: 2022
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: recycled high-density polyethylene
rice husk
twin-screw extruder
heated two-roll mill
Opis:: This study compares the mechanical properties of recycled high-density polyethylene (r-HDPE)/rice husk (RH) composites from a twin-screw extruder and a heated two-roll mill, and the effect of different filler loadings using different melt blending processes on the mechanical properties of r-HDPE/RH composites. Polyethylene-graft-maleic anhydride (MAPE) acts as the coupling agent to enhance interfacial bonding between the fibre and the polymer matrix. The filler loading used was in the range of 10-40 wt. %. In this work, r-HDPE/RH blends were prepared using a twin-screw extruder and a heated two-roll mill. The ratio of 70/30 twin-screw extruder compounded composites significantly showed higher tensile based on improved to about 45.5% at 11 MPa compared to those compounded in the heated two-roll mill. The same ratio showed an increment almost up to 9% of elongation at break. It has also been verified that the higher filler loading used reduced the tensile strength and elongation at break, while the Young’s modulus increased. The result was evidenced by the increase in water absorption and longer burning time as the filler loading increased.
Źródło:: Archives of Metallurgy and Materials; 2022, 67, 2; 661--668
1733-3490
Pojawia się w:: Archives of Metallurgy and Materials
Dostawca treści:: Biblioteka Nauki

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