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Thematische Bibliographien / Nr-ITS / Zeitschriftenartikel

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Zeitschriftenartikel zum Thema „Nr-ITS“

Autor: Grafiati

Veröffentlicht am 7. Juni 2025

Zuletzt aktualisiert am 2. August 2025

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1

Handayani, H., A. Cifriadi, A. S. Handayani, M. Chalid, S. Savetlana, and M. Christwardana. "Effect of NR-g-cellulose coupling agent into NR-cellulose composite dispersibility and its physical properties." IOP Conference Series: Materials Science and Engineering 703 (December 4, 2019): 012007. http://dx.doi.org/10.1088/1757-899x/703/1/012007.

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Kim, Younsun, Feifei Sun, Yi Wang, et al. "New Radio (NR) and its Evolution toward 5G-Advanced." IEEE Wireless Communications 26, no. 3 (2019): 2–7. http://dx.doi.org/10.1109/mwc.2019.8752473.

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3

Sithornkul, Sarawuth, and Poonsub Threepopnatkul. "Control of Mechanical Properties and Permeability of Electrospun Natural Rubber with Different Composite Systems." Advanced Materials Research 93-94 (January 2010): 619–22. http://dx.doi.org/10.4028/www.scientific.net/amr.93-94.619.

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The electrospun natural rubber (NR) with two different components namely: acrylonitrile butadiene styrene (ABS) and carbon black (CB) have been extensively studied. The main objective was to investigate the mechanical properties and permeability dependency of NR/ABS and NR/CB as well as its contents. NR/CB was compounded by torque rheometer (Brabender) while ABS was dissolved with NR using tetrahydrofuran (THF) as its solvent. Sulfur was used as the vulcanizing agent in both systems. Mechanical properties were evaluated by universal testing machine and permeability was observed by water vapour

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Al Yammahi, Kamal, and Mohan Guruswamy. "Exploring the role of CSR as national responsibility." Journal of Global Responsibility 8, no. 1 (2017): 34–46. http://dx.doi.org/10.1108/jgr-11-2016-0033.

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Purpose This paper aims to consolidate the constructs of national responsibility (NR) and corporate social responsibility (CSR) in the context of corporate responsibilities. The paper traces the historical evolution of the concepts of NR and CSR with a discussion on bridging CSR with NR. The aim of this paper is to develop an understanding of the potential of CSR to support NR. Design/methodology/approach This paper reviews the historical evolution of the CSR and NR concepts to identify how CSR can be integrated and focused towards supporting NR. Findings NR needs partnership and support from

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Lv, Ming Zhe, Lei Fang, Pu Wang Li, and Chun Liang Yang. "The Natural Rubber/Zinc Oxide Nanocomposites: Its Morphology, Mechanical and Thermal Decomposing Properties." Advanced Materials Research 936 (June 2014): 394–99. http://dx.doi.org/10.4028/www.scientific.net/amr.936.394.

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Natural rubber /Zinc Oxide (NR/ZnO) nanocomposites are fabricated by blending natural rubber latex with aqueous suspension of nanoZnO particles. Its morphology and thermal/thermooxidative ageing resistance are investigated with scanning electron microscopy (SEM) and thermogravimetric analyzer (TGA). The results show that the mechanical properties of NR is greatly improved by the incorporation of nanoZnO, nanoparticles, which are homogenously distributed throughout NR matrix as nanoclusters with an average size of 80 nm when the ZnO loading is less than 4 wt%. The thermal/thermooxidative aging

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Schabert, Günter, Robert Haase, Jaclyn Parris, et al. "New Crystalline Salts of Nicotinamide Riboside as Food Additives." Molecules 26, no. 9 (2021): 2729. http://dx.doi.org/10.3390/molecules26092729.

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NR+ is a highly effective vitamin B3 type supplement due to its unique ability to replenish NAD+ levels. While NR+ chloride is already on the market as a nutritional supplement, its synthesis is challenging, expensive, and low yielding, making it cumbersome for large-scale industrial production. Here we report the novel crystalline NR+ salts, d/l/dl-hydrogen tartrate and d/l/dl-hydrogen malate. Their high-yielding, one-pot manufacture does not require specific equipment and is suitable for multi-ton scale production. These new NR+ salts seem ideal for nutritional applications due to their bio-

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You, Young-Hwan, Yong-An Jung, Sung-Hun Lee, Sung-Chan Choi, and Intae Hwang. "Complexity-Effective Joint Detection of Physical Cell Identity and Integer Frequency Offset in 5G New Radio Communication Systems." Mathematics 11, no. 20 (2023): 4326. http://dx.doi.org/10.3390/math11204326.

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This paper presents a simplified joint synchronization scheme for the integer carrier frequency offset and physical cell identity using a primary synchronization signal (PSS) in 5G new radio (NR) communication systems. We demonstrate the efficiency of our proposed NR-PSS synchronization scheme by deriving its simplified implementation, which exploits the near-zero autocorrelation feature between cyclically shifted NR-PSS symbols. As a figure of merit, we compute the probability of detection failure of the proposed NR-PSS synchronization scheme and validate its accuracy via simulations. To illu

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Dieu, Tran Vinh, Bui Chuong, Dang Viet Hung, Nguyen Huy Tung, Nguyen Pham Duy Linh, and Doan Thi Yen Oanh. "Review: Natural rubber – Improvement of properties." Vietnam Journal of Chemistry 61, no. 3 (2023): 269–83. http://dx.doi.org/10.1002/vjch.202200225.

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AbstractNatural rubber (NR) is valuable material of natural origination with growing demand worldwide. Thus, the methods for NR property improvement are continuously developed. The article will be focused on methods of chemical modification of NR and the use of improved traditional fillers such as carbon black (CB) and silica. Modification reactions include epoxidation, hydrogenation, and grafting vinyl monomers onto NR molecules. Some methods of surface modification of NR film were also reviewed. Thanks to modification the NR degree of unsaturatiton is decrease that leads to its enhanced agin

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Lv, Mingzhe, Lei Fang, Heping Yu, Porntip Rojruthai, and Jitladda Sakdapipanich. "Discoloration Mechanisms of Natural Rubber and Its Control." Polymers 14, no. 4 (2022): 764. http://dx.doi.org/10.3390/polym14040764.

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Color is an important indicator for evaluating the quality of natural rubber (NR). Light-colored standard rubbers are widely used in high-grade products and have high economic value. This paper first introduces the history and test standards of the standard light-colored rubber. The origin of color deepening in NR processing, color substances, and its biosynthetic pathway are reviewed. Then, the discoloration mechanism of NR is studied from the perspectives of enzymatic browning (caused by polyphenol oxidase and polyphenols) and non-enzymatic browning (including Maillard reaction and lipid oxi

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Makarov, Mikhail V., та Marie E. Migaud. "Syntheses and chemical properties of β-nicotinamide riboside and its analogues and derivatives". Beilstein Journal of Organic Chemistry 15 (13 лютого 2019): 401–30. http://dx.doi.org/10.3762/bjoc.15.36.

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The β-anomeric form of nicotinamide riboside (NR+) is a precursor for nicotinamide adenine dinucleotide (NAD+), a redox cofactor playing a critical role in cell metabolism. Recently, it has been demonstrated that its chloride salt (NR+Cl−) has beneficial effects, and now NR+Cl−is available as a dietary supplement. Syntheses and studies of analogues and derivatives of NR+are of high importance to unravel the role of NR+in biochemical processes in living cells and to elaborate the next generation of NR+derivatives and conjugates with the view of developing novel drug and food supplement candidat

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Liang, Tian, and Avraam I. Isayev. "Ultrasonic Extrusion of NR Gum and Its Effect on the Structure and Properties of Unfilled and Silica‐Filled NR." Polymer Engineering & Science 60, no. 5 (2020): 925–34. http://dx.doi.org/10.1002/pen.25348.

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Zhao, Fu Chun, Shuang Quan Liao, and Chun Ping Wu. "Effect of Grafting Conditions on NR-s-g-HFMA Copolymer and its Thermal Stability." Advanced Materials Research 1094 (March 2015): 91–95. http://dx.doi.org/10.4028/www.scientific.net/amr.1094.91.

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<p>Skim natural rubber (NR-s) is solidified by skim natural rubber latex. NR-s is often evaluated to low grade natural rubber because of its many bad properties such as poor resistance to aging. In order to improve the NR-s comprehensive property, fluorinated groups were incorporated into NR-s molecular chain by grafting via solution polymerization method. The grafted copolymer was characterized and the effects of conditions on grafting ratio and grafting efficiency were investigated. The thermal stability are also examined.</p>

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Biţă, Andrei, Ion Romulus Scorei, Maria Viorica Ciocîlteu, et al. "Nicotinamide Riboside, a Promising Vitamin B3 Derivative for Healthy Aging and Longevity: Current Research and Perspectives." Molecules 28, no. 16 (2023): 6078. http://dx.doi.org/10.3390/molecules28166078.

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Many studies have suggested that the oxidized form of nicotinamide adenine dinucleotide (NAD+) is involved in an extensive spectrum of human pathologies, including neurodegenerative disorders, cardiomyopathy, obesity, and diabetes. Further, healthy aging and longevity appear to be closely related to NAD+ and its related metabolites, including nicotinamide riboside (NR) and nicotinamide mononucleotide (NMN). As a dietary supplement, NR appears to be well tolerated, having better pharmacodynamics and greater potency. Unfortunately, NR is a reactive molecule, often unstable during its manufacturi

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Patriciello, Natale, Sandra Lagén, Biljana Bojovic, and Lorenza Giupponi. "NR-U and IEEE 802.11 Technologies Coexistence in Unlicensed mmWave Spectrum: Models and Evaluation." IEEE Access 8 (April 1, 2020): 71254–71. https://doi.org/10.1109/ACCESS.2020.2987467.

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New Radio-based access to Unlicensed spectrum (NR-U) intends to expand the applicability of 5G NR access technology to support operation in unlicensed bands by adhering to Listen-Before-Talk (LBT) requirement for accessing the channel. As the NR-U specification is being developed, simulations to assess the performance of NR-U and IEEE 802.11 technologies coexistence in unlicensed spectrum bands are crucial. In this paper, we report on extensions to a popular and open source network simulator, ns-3, to build an NR-U system-level simulator and to model the NR-U and IEEE 802.11 technologies coexi

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Pantea-Roșan, Larisa Renata, Simona Gabriela Bungau, Andrei-Flavius Radu, et al. "A Narrative Review of the Classical and Modern Diagnostic Methods of the No-Reflow Phenomenon." Diagnostics 12, no. 4 (2022): 932. http://dx.doi.org/10.3390/diagnostics12040932.

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The incidence of the no-reflow (NR) phenomenon varies depending on the diagnostic criteria used. If just the angiographic criteria are considered (i.e., a degree of thrombolysis in myocardial infarction ≤2), it will be found that the incidence of NR is quite low; on the other hand, when the myocardial NR is taken into account (i.e., a decrease in the quality of myocardial reperfusion expressed by the degree of myocardial blush), the real incidence is higher. Thus, the early establishment of a diagnosis of NR and the administration of specific treatment can lead to its reversibility. Otherwise,

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Mehmel, Mario, Nina Jovanović, and Urs Spitz. "Nicotinamide Riboside—The Current State of Research and Therapeutic Uses." Nutrients 12, no. 6 (2020): 1616. http://dx.doi.org/10.3390/nu12061616.

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Nicotinamide riboside (NR) has recently become one of the most studied nicotinamide adenine dinucleotide (NAD+) precursors, due to its numerous potential health benefits mediated via elevated NAD+ content in the body. NAD+ is an essential coenzyme that plays important roles in various metabolic pathways and increasing its overall content has been confirmed as a valuable strategy for treating a wide variety of pathophysiological conditions. Accumulating evidence on NRs’ health benefits has validated its efficiency across numerous animal and human studies for the treatment of a number of cardiov

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Dai, Jing-Min, Yu Xiong, Pan Li, Yue-Liang Xu, and Qiang Fan. "A new species of Sedum (Crassulaceae) from eastern China based on morphological and molecular evidence." PhytoKeys 253 (March 14, 2025): 271–85. https://doi.org/10.3897/phytokeys.253.119922.

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<i>Sedum orientalichinense</i>, a new species of Crassulaceae from eastern China, is described and illustrated here. Phylogenetic analysis based on the internal transcribed spacer (ITS) region of nrDNA suggests that the new species belongs to S. sect. Sedum sensu Fu and Ohba (2001) in the "Flora of China", and is sister to <i>S. makinoi</i> with high support values (BS = 100, PP = 1). The new species was previously always misidentified as <i>S. makinoi</i>, <i>S. emarginatum</i> or <i>S. baileyi</i>, due to its opposite leaves. <i>Sedum emarginatum</i> can be easily distinguished by its leaf b

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HUANG, Hai-Tao, Xiang-Min RONG, Hai-Xing SONG, et al. "Effect of Nitrate Reductase (NR) Inhibitor on NR Activity in Oilseed Rape (Brassica napusL．) and Its Relation to Nitrate Content." Acta Agronomica Sinica 39, no. 9 (2013): 1668. http://dx.doi.org/10.3724/sp.j.1006.2013.01668.

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Rahmah, Mohamed, Wan Zain Norazira, Ahmad Faiza Mohd, and Mohd Nurazzi Norizan. "Effect of Epoxidized Oil on Tensile and Tear Strength of NR Vulcanizate and its Comparison with Aromatic Oil NR Vulcanizates." Advanced Materials Research 812 (September 2013): 204–9. http://dx.doi.org/10.4028/www.scientific.net/amr.812.204.

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Epoxidized oil (EO) is a sustainable oil that can be obtained form edible or non-edible naturals oil. The incorporation of epoxidized oil can increase the green component in rubber compound. It can contributes to worldwide technology specially in green tyre manufacturing. Epoxidized oil has the potential to replace aromatic oil (AO) to rubber and polymer industry. The effect of incorporation of EO and AO into natural rubber vulcanizates (NR) was studied via tensile and tear strength tests according to ISO 31-1977 and ISO 6133, respectively. Tensile strength of AO value showed greather value co

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Longkaew, Khansinee, Alain Gibaud, Wasan Tessanan, Philippe Daniel, and Pranee Phinyocheep. "Spherical CaCO3: Synthesis, Characterization, Surface Modification and Efficacy as a Reinforcing Filler in Natural Rubber Composites." Polymers 15, no. 21 (2023): 4287. http://dx.doi.org/10.3390/polym15214287.

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Natural rubber (NR), an important natural polymer derived from the Hevea brasiliensis tree, has been widely used in the rubber industry owing to its excellent elastic properties. However, it requires reinforcing fillers to improve its mechanical properties for the manufacturing of rubber products. Generally, calcium carbonate (CaCO3) is employed as a non-reinforcing filler. This work aimed to synthesize spherical-shaped CaCO3 at a submicrometric scale without and with surface treatment and explore its utilization as a reinforcing filler in NR composites. The morphological shape and polymorphic

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Hartung, L. L., L. R. Goertzen, and E. C. Theriot. "INTRAGENOMIC NR DNA ITS POLYMORPHISM IN THE STEPHANODISCUS NIAGARAE COMPLEX (BACILLARIOPHYCEAE)." Journal of Phycology 36, s3 (2000): 29. http://dx.doi.org/10.1046/j.1529-8817.1999.00001-86.x.

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Falope, F. Y., A. K. Akinlabi, and M. A. Idowu. "Assessment of Physico-mechanical Properties of Natural Rubber and Modified Natural Rubber Vulcanizates with Watermelon Rind as Fillers." Journal of Applied Sciences and Environmental Management 26, no. 5 (2022): 823–28. http://dx.doi.org/10.4314/jasem.v26i5.7.

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Natural Rubber (NR) has a relatively low tensile modulus and strength, hence the need for reinforcing fillers to increase its tensile strength, hardness and abrasion resistance. In this study, NR was deproteinized, epoxidized and depolymerized. The functional groups of the NR and the modified NR were determined using Fourier Transform Infrared (FT-IR) spectroscopy. Watermelon Rind (WR) was used as fillers to replace Carbon Black (CB) in the compounding process. The shells were collected, dried, milled and sieved to 75 µm mesh size. Powdered WR was carbonized at 250oC for 1.5 hrs to obtain Carb

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Sakdapipanich, J. "Deciphering the discoloration in the manufacturing of natural rubber." IOP Conference Series: Materials Science and Engineering 1234, no. 1 (2022): 012010. http://dx.doi.org/10.1088/1757-899x/1234/1/012010.

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Abstract Many naturally occurring color components, especially non-rubber components, are present in natural rubber (NR) latex, limiting some NR applications, particularly for light-colored NR products in high demand. Non-rubber components, like lipids and proteins, can be removed from NR to reduce its yellow color. This study looked at the factors that influence the yellow index (YI) in NR and NR latex discoloration techniques. Proteins were a crucial factor directly determining the YI of NR. Thus, increasing the number of centrifugation washings, speed, and time was used to remove proteins t

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Kropotov, Andrey, Veronika Kulikova, Kirill Nerinovski, et al. "Equilibrative Nucleoside Transporters Mediate the Import of Nicotinamide Riboside and Nicotinic Acid Riboside into Human Cells." International Journal of Molecular Sciences 22, no. 3 (2021): 1391. http://dx.doi.org/10.3390/ijms22031391.

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Nicotinamide riboside (NR), a new form of vitamin B3, is an effective precursor of nicotinamide adenine dinucleotide (NAD+) in human and animal cells. The introduction of NR into the body effectively increases the level of intracellular NAD+ and thereby restores physiological functions that are weakened or lost in experimental models of aging and various pathologies. Despite the active use of NR in applied biomedicine, the mechanism of its transport into mammalian cells is currently not understood. In this study, we used overexpression of proteins in HEK293 cells, and metabolite detection by N

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Xiao, Ying, Nengzhi Pang, Sixi Ma, Mengqi Gao, and Lili Yang. "Effect of Nicotinamide Riboside Against the Exhaustion of CD8+ T Cells via Alleviating Mitochondrial Dysfunction." Nutrients 16, no. 21 (2024): 3577. http://dx.doi.org/10.3390/nu16213577.

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Background: Targeting mitochondria and protecting the mitochondrial function of CD8+ T cells are crucial for enhancing the clinical efficacy of cancer immunotherapy. Objectives: In this study, our objective was to investigate the potential of nicotinamide riboside (NR) in preserving the mitochondrial function of CD8+ T cells and mitigating their exhaustion. Methods: We established two in vitro models to induce CD8+ T cell exhaustion either by tumor cell-conditioned medium (TCM) or by continuous stimulation with OVA(257–264) peptide. CD8+ T cells were treated in the absence/presence of NR. Resu

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Jiang, Hong Xia, Qing Qing Ni, and Toshiaki Natsuki. "Effect of Carbon Nanotubes on the Properties of Natural Rubber Composites." Key Engineering Materials 464 (January 2011): 660–62. http://dx.doi.org/10.4028/www.scientific.net/kem.464.660.

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Carbon nanotubes (CNTs) reinforced natural rubber (NR) composite was fabricated in a solvent casting method. The tensile properties and electrical resistivities were investigated. As a comparison, carbon black (CB) reinforced NR was also prepared in the same method. The initial modulus of NR/3 wt% CNT composite was about 1.6 times as large as that of NR/ 3wt% CB composite. NR/CNT composite had a percolation threshold value of about 5 wt% CNTs. The morphology of fillers and composites were observed by transmission electron microscopy (TEM) and scanning electron microscopy (SEM). The improved pr

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Liu, Hsian-Ming, and Hsin-Feng Yang. "Network resource meets organizational agility." Management Decision 58, no. 1 (2020): 58–75. http://dx.doi.org/10.1108/md-10-2017-1061.

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Purpose The purpose of this paper is to propose that a firm could exploit the ties of interfirm network to access external network resources (NR) to assist its sensing and responding capabilities for the variability of business environment, thereby leading to superior organizational performance. Design/methodology/approach This study uses the survey data collected from 260 small- and medium-sized enterprises (SMEs) in Taiwan to examine the causal effects of hypotheses testing. By adopting structural equation modeling technology, the direct and mediating effects among the NR, sensing capability

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Wang, Kai, Hengxu Lv, and Zhixin Liu. "Vulcanization Characteristics and Static/Dynamic Mechanical Properties of Chlorinated Butyl Rubber Matrix Materials." Polymers 17, no. 6 (2025): 708. https://doi.org/10.3390/polym17060708.

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The damping performance of chlorinated butyl rubber (CIIR) is exceptional; however, its poor processability during vulcanization can lead to numerous defects. Natural rubber (NR) and ethylene propylene diene monomer rubber (EPDM) were selected to blend with CIIR for improving its processing performance. Their effects on the vulcanization characteristics, mechanical properties, and damping performance were investigated. Blending CIIR with NR can considerably increase the vulcanization speed of the rubber compound and improve production efficiency. The tensile strength of the vulcanizate first i

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Yamashita, Satoshi, and Seiji Takahashi. "Molecular Mechanisms of Natural Rubber Biosynthesis." Annual Review of Biochemistry 89, no. 1 (2020): 821–51. http://dx.doi.org/10.1146/annurev-biochem-013118-111107.

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Natural rubber (NR), principally comprising cis-1,4-polyisoprene, is an industrially important natural hydrocarbon polymer because of its unique physical properties, which render it suitable for manufacturing items such as tires. Presently, industrial NR production depends solely on latex obtained from the Pará rubber tree, Hevea brasiliensis. In latex, NR is enclosed in rubber particles, which are specialized organelles comprising a hydrophobic NR core surrounded by a lipid monolayer and membrane-bound proteins. The similarity of the basic carbon skeleton structure between NR and dolichols an

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Wu, Jing, Maximilian Bley, Russell S. Steans, et al. "Nicotinamide Riboside Augments Human Macrophage Migration via SIRT3-Mediated Prostaglandin E2 Signaling." Cells 13, no. 5 (2024): 455. http://dx.doi.org/10.3390/cells13050455.

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NAD+ boosting via nicotinamide riboside (NR) confers anti-inflammatory effects. However, its underlying mechanisms and therapeutic potential remain incompletely defined. Here, we showed that NR increased the expression of CC-chemokine receptor 7 (CCR7) in human M1 macrophages by flow cytometric analysis of cell surface receptors. Consequently, chemokine ligand 19 (CCL19, ligand for CCR7)-induced macrophage migration was enhanced following NR administration. Metabolomics analysis revealed that prostaglandin E2 (PGE2) was increased by NR in human monocytes and in human serum following in vivo NR

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Prukkaewkanjana, Kontapond, Seiichi Kawahara, and Jitladda Sakdapipanich. "Influence of Reaction Conditions on the Properties of Nano-matrix Structure Formed by Graft-Copolymerization of Acrylonitrile onto Natural Rubber." Advanced Materials Research 844 (November 2013): 365–68. http://dx.doi.org/10.4028/www.scientific.net/amr.844.365.

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Natural rubber (NR) is one of the most important agriculture products of Thailand, which is an important material with unique and special characteristics used in wide range of applications such as mechanical properties, excellent strength, and elasticity. However, it is inferior in oil resistance due to the presence of hydrogen and carbon in its structure. This inherent drawback of NR has limited its application in industry. In order to expand the use of NR, this research is interested to improve the oil resistance of NR without loss of outstanding properties by grafting NR with acrylonitrile

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Cattani, Aline, Igor C. Eckert, Júlia E. Brito, Rafaela F. Tartari, and Flávia M. Silva. "Nutritional risk in critically ill patients: how it is assessed, its prevalence and prognostic value: a systematic review." Nutrition Reviews 78, no. 12 (2020): 1052–68. http://dx.doi.org/10.1093/nutrit/nuaa031.

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Abstract Context Nutritional risk (NR) screening is the first step of nutrition care process. Few data are available in literature about its prevalence, nor, to our knowledge, is a universally accepted reference method for the intensive care unit (ICU). Objective The aim for this systematic review was to summarize evidence regarding the prevalence of NR and the predictive validity of different tools applied for NR screening of critically ill patients. Data Sources The PubMed, Embase, and Scopus databases were searched up to December 2019 using the subject headings related to critically ill pat

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Wang, Yong Zhou, Fu Quan Zhang, Mei Chen, Hong Hai Huang, Mao Fang Huang, and Ri Zhong Zeng. "Effect of Microwave Drying on Cure Characteristics of Natural Rubber." Advanced Materials Research 421 (December 2011): 27–30. http://dx.doi.org/10.4028/www.scientific.net/amr.421.27.

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In this work, the cure characteristics of nature rubber (NR) dried by microwave and hot-air were analyzed by using Vulcameter. The effect of curing temperature on induction period (tC10), optimum cure point (tC90), maximum Torque (MH) and minimum induced torque (ML) were studied. The results showed that the tC10, tC90 and ML of NR dried by hot-air were bigger than those of NR dried by microwave, however, the MH of former was bigger. And the tC10, tC90 of NR dried by microwave or hot-air can fitted Arrhenius equation well, the K1, K2 and K of Arrhenius equation coefficient for NR dried by micro

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Wulandari, Ratna Juliarti, Muhammad Sumaryono, and Ali Suhardiman. "Population distribution patterns of Nepenthes reinwardtiana Miq. in Kerangas Forest of Teluk Adang Nature Reserve, Paser Regency." Jurnal Penelitian Kehutanan Wallacea 9, no. 1 (2020): 23. http://dx.doi.org/10.18330/jwallacea.2020.vol9iss1pp23-30.

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Teluk Adang Nature Reserve (NR) is one of the Nepenthes habitats in East Kalimantan. One of the four Nepenthes species that can be found in this nature reserve is Nepenthes reinwardtiana or by local people known as anjat datu. The objectives of this study are to determine the population of N. reinwardtiana in Teluk Adang NR by calculating its density and frequency, and to know its distribution pattern using Morisita index and spatial analysis approach in the form of Nearest Neighbor Analysis and Multi-Distance Spatial Cluster Analysis (Ripley's K Function). To know its distribution pattern, a

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Habib, Anwer, Lila Habib, and Khaled Habib. "Representation of effective facial mask design as a novel dimensionless number—Implications for COVID 19 pandemic." AIP Advances 13, no. 3 (2023): 035035. http://dx.doi.org/10.1063/5.0084015.

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A dimensionless number Nr for the effective design of facial masks was derived and compared with other dimensionless numbers of fluid mechanics. Nr is found to closely resemble Euler’s number (Eu). Nr is equal to the logarithmic function of the ratio of inertial force (Fi) of the air to the pressure force (Fp) of the air through the porous membrane of the mask. Nr is then introduced as a novel dimensionless number (Habib number) Ha in which the air flow through a facial mask is derived with parameters for an effective barrier from the COVID-19 virus (SARS COV 2). The introduction of Ha was not

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Dzulkafly, Nuur Syuhada, and Azura A. Rashid. "Influence of Alkaline Treated Sugarcane Bagasse Loading on Mechanical Properties of Natural Rubber Latex Films." Journal of Physics: Conference Series 2907, no. 1 (2024): 012006. https://doi.org/10.1088/1742-6596/2907/1/012006.

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Abstract Agricultural waste is a natural source of biomaterials that can be used as filler to create a variety of high-value industrial products. Agricultural waste gains more interest due to it is economical, cheap, readily available, and environmentally friendly. However, agricultural waste requires modification in order to improve its compatibility with Natural Rubber (NR) latex due to its incompatibility. This paper aims to determine the effect of the addition of the alkaline-treated sugarcane bagasse (ATSB) in NR latex film on its mechanical properties. Sugarcane bagasse was treated with

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Grumet, M., V. Mauro, M. P. Burgoon, G. M. Edelman, and B. A. Cunningham. "Structure of a new nervous system glycoprotein, Nr-CAM, and its relationship to subgroups of neural cell adhesion molecules." Journal of Cell Biology 113, no. 6 (1991): 1399–412. http://dx.doi.org/10.1083/jcb.113.6.1399.

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We have identified and characterized a new glycoprotein in the chicken nervous system using immunological and molecular biological methods and we have examined its tissue distribution. Analysis revealed that this protein is very similar in structure to the chicken neuron-glia cell adhesion molecule, Ng-CAM, and to mouse L1. cDNA clones encompassing the entire coding sequence of this Ng-CAM related molecule, called Nr-CAM, have been isolated and sequenced. A glycoprotein containing one major component of Mr 145,000 on SDS-PAGE was purified from brain by lentil lectin affinity chromatography and

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Ninjan, Rattanawadee, Bencha Thongnuanchan, Natinee Lopattananon, Anoma Thitithammawong, and Charoen Nakason. "Rubber-to-steel adhesives based on natural rubber grafted with poly(acetoacetoxyethyl methacrylate)." Journal of Polymer Engineering 41, no. 3 (2021): 192–201. http://dx.doi.org/10.1515/polyeng-2020-0156.

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Abstract The present study aimed to develop adhesives for bonding natural rubber (NR) to steel based on modified NR bearing grafted poly(acetoacetoxyethyl methacrylate), NR-g-PAAEM. Graft copolymers of NR-g-PAAEMs were prepared by emulsion polymerization at 50 °C. A significant increase in the polar component of NR from 1.62 to 6.84 mN/m was observed after grafting modification, indicating an increase in its hydrophilicity. After that, both one-coat and two-coat adhesives (or adhesive/cover-coat system) were then prepared, using polyisocyanate (poly‐HDI) as a bonding agent. The NR/steel joints

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Viégas, Ricardo Almeida, and Joaquim Albenísio Gomes Silveira. "Activation of nitrate reductase of cashew leaf by exogenous nitrite." Brazilian Journal of Plant Physiology 14, no. 1 (2002): 39–44. http://dx.doi.org/10.1590/s1677-04202002000100005.

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Nitrate reductase (NR) plays a central role in plant primary metabolism and exhibits complex regulation mechanisms for its catalytic activity. There is controversy in the literature concerning the possible direct effect of NO2- on the stimulation and/or activation of NR activity. The influence of NO2- was studied on the NR activity in the leaves of 30-day-old cashew (Anacardium occidentale L.) seedlings. Addition of NO2- to the reaction mixture containing leaf enzymatic extract resulted in a remarkable increase in NR activity. A trace amount (5 mumol.L-1) of NO2- was required to achieve full N

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Zhang, Fu Quan, Yong Zhou Wang, Mei Chen, and Mao Fang Huang. "Viscoelastic Characterization of Microwave Drying Nature Rubber." Advanced Materials Research 291-294 (July 2011): 1344–50. http://dx.doi.org/10.4028/www.scientific.net/amr.291-294.1344.

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Nature rubber (NR) is neither completely viscous nor elastic in nature, but viscoelastic in their properties. In the experiment, we used two types of equipments named rubber process analyzer (RPA) 2000 and mooney viscometer to characterize the viscoelastic properties of NR dried by microwave and hot-air, respectively. In present research, RPA tests on uncured NR dried by different methods were carried out using frequency and strain sweeps, and Mooney viscometer was detected using the big rotor at 100°C. The results showed that microwave drying has not influenced the viscoelastic properties of

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Sorarutayangkoor, Chadchai, Jirapong Boonyasiri, and Jitladda Sakdapipanich. "A Study on the Graft-Copolymerization of 2-Acryloyloxyethyl Acid Phosphate onto Natural Rubber." Advanced Materials Research 844 (November 2013): 377–80. http://dx.doi.org/10.4028/www.scientific.net/amr.844.377.

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Nowadays, natural rubber (NR) is one of the most important agricultural product of Thailand, which is an important substance with special characteristics such as mechanical properties, excellent strength, and low heat build-up. However, NR is non-polarity that limited its application in industry. To expand the use of NR, this research is interested to improve the polarity of NR by grafting NR with 2-acryloyloxyethyl acid phosphate (P-1A(N)) monomer. The influences of the monomer concentration, dry rubber concentration (DRC) and reaction time were investigated. The best condition of the graft c

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Mishra, P. K., R. T. V. Fox, and A. Culham. "Application of nr-DNA ITS sequence for identification of Fusarium culmorum isolates." EPPO Bulletin 30, no. 3-4 (2000): 493–98. http://dx.doi.org/10.1111/j.1365-2338.2000.tb00936.x.

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Mofidi, Seyed Shahab Hedayat, Mohammad Reza Naghavi, Manijeh Sabokdast, Parisa Jariani, Meisam Zargar, and Katrina Cornish. "Effect of drought stress on natural rubber biosynthesis and quality in Taraxacum kok-saghyz roots." PLOS ONE 19, no. 1 (2024): e0295694. http://dx.doi.org/10.1371/journal.pone.0295694.

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Taraxacum kok-saghyz (TKS) is a potential source of natural rubber (NR) that can be grown in temperate regions with limited water availability. However, the effect of drought stress on NR production and properties in TKS isn’t well studied. This study examined how different levels of drought stress (30, 60 and 90%) influenced the NR content, molecular weight (Mw), glass transition temperature (Tg), gene expression, and biochemical parameters in TKS roots. The results showed that drought stress didn’t significantly change the NR content, but increased the Mw and the expression of CPT and SRPP g

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Longsaman, Massaya, Thitima Rujiralai, Wilairat Cheewasedtham, and Chatchai Putson. "Enhanced Dielectric and Mechanical Properties of Natural Rubber Composites Filled with Gold Nanoparticles." Key Engineering Materials 772 (July 2018): 43–47. http://dx.doi.org/10.4028/www.scientific.net/kem.772.43.

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In this work, we present the novel robust material, modified natural rubber (NR) composites filled with gold nanoparticles (AuNPs). To investigate its outstanding properties, dielectric, electrical and mechanical properties of NR and modified NR composites filled with gold nanoparticles (AuNPs) were studied. The NR and all composite films were prepared by using solution casting method. The size of the synthetic AuNPs was analyzed by Transmission Electron Microscope (TEM) technique. The dispersion of AuNPs fillers within the NR matrix was investigated by scanning electron microscopy (SEM). Diel

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Pytowski, Drozdz, Jiang, et al. "Nucleoplasmic Reticulum Formation in Human Endometrial Cells is Steroid Hormone Responsive and Recruits Nascent Components." International Journal of Molecular Sciences 20, no. 23 (2019): 5839. http://dx.doi.org/10.3390/ijms20235839.

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The nuclei of cells may exhibit invaginations of the nuclear envelope under a variety of conditions. These invaginations form a branched network termed the nucleoplasmic reticulum (NR), which may be found in cells in pathological and physiological conditions. While an extensive NR is a hallmark of cellular senescence and shows associations with some cancers, very little is known about the formation of NR in physiological conditions, despite the presence of extensive nuclear invaginations in some cell types such as endometrial cells. Here we show that in these cells the NR is formed in response

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Nematollahi, Mahsa, and Azam Jalali-Arani. "The use of waste rubber in natural rubber in the presence of maleic anhydride-grafted natural rubber (MA-g-NR): study on curing, rheology, morphology, and properties of the blend." Journal of Polymer Engineering 34, no. 1 (2014): 33–40. http://dx.doi.org/10.1515/polyeng-2013-0020.

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Abstract The direct incorporation of ground tire rubber (GTR) as a waste rubber into a virgin polymer matrix causes a remarkable reduction in its mechanical and performance properties. In this work, maleic anhydride-grafted natural rubber (MA-g-NR) was employed as a compatibilizer to improve the interaction between a natural rubber (NR) matrix and GTR. The effect of MA-g-NR on curing characteristics, rheological behavior, morphology, and performance properties of the NR-GTR blend was studied using an oscillating disk rheometer, rheomechanical spectroscopy (RMS), scanning electron microcopy (SE

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Nijpanich, Supinya, Adun Nimpaiboon, Porntip Rojruthai, et al. "Preparation and Characterization of TiO2-Coated Hollow Glass Beads for Functionalization of Deproteinized Natural Rubber Latex via UVA-Activated Photocatalytic Degradation." Polymers 15, no. 19 (2023): 3885. http://dx.doi.org/10.3390/polym15193885.

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The photochemical degradation of natural rubber (NR) is a prevalent method used to modify its inherent properties. Natural rubber, predominantly derived from the Hevea Brasiliensis tree, exhibits an exceptionally high molecular weight (MW), often reaching a million daltons (Da). This high MW restricts its solubility in various solvents and its reactivity with polar compounds, thereby constraining its versatile applications. In our previous work, we employed TiO2 in its powdered form as a photocatalyst for the functionalization of NR latex. However, the post-process separation and reuse of this

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Onchoy, Nuchanart, and Pranee Phinyocheep. "PREPARATION AND CHARACTERIZATION OF BROMINATED NATURAL RUBBER APPLIED IN SILICA-FILLED NATURAL RUBBER VULCANIZATES." Rubber Chemistry and Technology 89, no. 3 (2016): 406–18. http://dx.doi.org/10.5254/rct.16.84833.

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ABSTRACT Functionalization of NR with a bromine atom was developed and explored for its application in a silica-reinforced NR system. Two possible pathways were investigated: the direct addition of a bromine atom using N-bromosuccinimide (NBS) with FeCl2 as a catalyst in the latex phase (NR–Br); and an indirect method using a ring opening of epoxidized natural rubber (ENR) with 2-bromopropionic acid (ENR–Br). The chemical structure, including determination of the bromine contents, was analyzed with proton nuclear magnetic resonance and Fourier transform infrared spectroscopy. The occurrence of

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Liu, Lei, Xiuying Zhang, Wen Xu, et al. "Reviewing global estimates of surface reactive nitrogen concentration and deposition using satellite retrievals." Atmospheric Chemistry and Physics 20, no. 14 (2020): 8641–58. http://dx.doi.org/10.5194/acp-20-8641-2020.

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Abstract. Since the industrial revolution, human activities have dramatically changed the nitrogen (N) cycle in natural systems. Anthropogenic emissions of reactive nitrogen (Nr) can return to the earth's surface through atmospheric Nr deposition. Increased Nr deposition may improve ecosystem productivity. However, excessive Nr deposition can cause a series of negative effects on ecosystem health, biodiversity, soil, and water. Thus, accurate estimations of Nr deposition are necessary for evaluating its environmental impacts. The United States, Canada and Europe have successively launched a nu

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Lovchik, Julie A., Douglas S. Reed, Julie A. Hutt, et al. "Identification of an Attenuated Substrain of Francisella tularensis SCHU S4 by Phenotypic and Genotypic Analyses." Pathogens 10, no. 6 (2021): 638. http://dx.doi.org/10.3390/pathogens10060638.

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Pneumonic tularemia is a highly debilitating and potentially fatal disease caused by inhalation of Francisella tularensis. Most of our current understanding of its pathogenesis is based on the highly virulent F. tularensis subsp. tularensis strain SCHU S4. However, multiple sources of SCHU S4 have been maintained and propagated independently over the years, potentially generating genetic variants with altered virulence. In this study, the virulence of four SCHU S4 stocks (NR-10492, NR-28534, NR-643 from BEI Resources and FTS-635 from Battelle Memorial Institute) along with another virulent sub

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