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Статті в журналах з теми "Resin yield"

Автор: Grafiati
Опубліковано: 3 червня 2025
Оновлено: 31 липня 2025

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1

Gajšek, Domen, Miha Brecelj, Kristjan Jarni, and Robert Brus. "Resin yield of Pinus nigra and Pinus sylvestris in the Slovenian Karst." Acta Silvae et Ligni 115 (2018): 21–28. http://dx.doi.org/10.20315/asetl.115.2.

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Анотація:
The aim of our research was to study the impact of various environmental factors on the resin production of pines in the Slovenian Karst. Five plots were established % three in Pinus nigra (Arnold) stands and two in Pinus sylvestris (L.) stands. On each plot, the 19-20 most vigorous dominant or codominant trees with a minimum diameter at breast height (DBH) of 20 cm were selected and their resin yield analysed in 2012. Resin yield in P. nigra was considerably higher than that in P. sylvestris. The average resin yield per tree during the study period of 102 days was 1.144 kg for P. nigra and 0.
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2

Madrigal, Javier, Cristina Carrillo-García, Aida Rodríguez-García, et al. "Prescribed underburning before resin tapping does not affect resin yield in Pinus pinaster Ait. stands." Forest Systems 34, no. 1 (2025): 20952. https://doi.org/10.5424/fs/2025341-20952.

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Анотація:
Aim of study: To assess the effect of prescribed underburning (PB) and tapping on resin yields in maritime pine stands. We hypothesized that PB reduces fire hazard, generates stress at the cambium level and potentially increases the number of resin canals and resin yield after tapping. Area of study: Northern Plateau of the Iberian Peninsula, central-eastern Spain. Material and methods: Six 50 m x 50 m plots were established in a Pinus pinaster Ait. stand, three of which were burned and tapped in 2018 and three controls plots (tapped only). Resin yield was monitored in 90 trees over four years
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3

Yang, Huanxin, Junjie Shi, Lin Chen, et al. "A Study of the Effects of Stimulants on Resin Yield, Resin Duct and Turpentine Chemical Composition in Pinus kesiya var. langbianensis." Forests 15, no. 5 (2024): 748. http://dx.doi.org/10.3390/f15050748.

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Анотація:
This study presents a comprehensive examination of Pinus kesiya var. langbianensis (Pinus kesiya var. langbianensis), the primary resin-extraction tree species in Yunnan Province, China. In this study, we formulated different concentration gradients of 0.25%, 0.5%, 1%, and 2% of diquat solution as tapping stimulant to test the effect of different concentrations on the resin gain rate of Pinus kesiya, and analyzed the relationship between anatomical structure, major chemical composition of turpentine and resin yield by methods such as wood anatomy and chemical composition analysis of turpentine
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4

Palma, Amélia, João Miguel Pereira, and Paula Soares. "Short Communication. Resin tapping activity as a contribution to the management of maritime pine forest." Forest Systems 25, no. 2 (2016): eSC11. http://dx.doi.org/10.5424/fs/2016252-08925.

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Анотація:
Aim of the study: In this work potential resin yield in a region of high forest ability where maritime pine is the main species was estimated in order to understand the viability of promoting resin exploitation.Area of study: This study was conducted in Castro Daire County in central region of Portugal.Material and methods: To quantify the resin yield of trees tapped for the first time two plots were installed in a maritime pine stand with average tree age 65 years. Before the beginning of the resin tapping, dendrometric tree variables were measured. Also, in a neighbouring stand, 25 trees wer
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5

Li, Zhengchun, Zijing Zhou, Qiandong Hou, Luonan Shen, Hong Zhao, and Xiaopeng Wen. "Physiological, Proteomic, and Resin Yield-Related Genes Expression Analysis Provides Insights into the Mechanisms Regulating Resin Yield in Masson Pine." International Journal of Molecular Sciences 24, no. 18 (2023): 13813. http://dx.doi.org/10.3390/ijms241813813.

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Анотація:
Masson pine (Pinus massoniana Lamb.) is an important resin-producing conifer species in China. Resin yield is a highly heritable trait and varies greatly among different genotypes. However, the mechanisms regulating the resin yield of masson pine remain largely unknown. In this study, physiological, proteomic, and gene expression analysis was performed on xylem tissues of masson pine with high and low resin yield. Physiological investigation showed that the activity of terpene synthase, as well as the contents of soluble sugar, jasmonic acid (JA), methyl jasmonate (MeJA), gibberellins (GA1, GA
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6

Tadesse, W., F. J. Auñón, J. A. Pardos, L. Gil, and R. Alía. "Early testing of resin yield in Pinus pinaster Ait." Forest Systems 10, no. 1 (2001): 141–50. http://dx.doi.org/10.5424/717.

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Анотація:
Micro-chipping was carried out in a clonal bank of Pinus pinaster with 17 clones and 69 ramets and 10 control (non grafted trees) trees. The micro-chipping consisted on the tapping of an area of 2.5 square cm above the graft union, every two weeks. Six tapping were made during the 3 months of the maximum resin yield (June, July and August). A high clonal heritability value (h2 = 0,501) for resin yield was computed. This demonstrates that more than 50 % of clonal resin yield variation is due to genetic factors. Moderately strong correlation was recorded between resin yield of the ortets and the
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7

Prasad, Niranjan, S. Sharma, S. Pandey, and Amit Kar. "Effect of Freshening Tools and Freshening Intervals on Resin Yield from Pinus caribaea using Bore Hole Method of Resin Tapping." Journal of Non Timber Forest Products 22, no. 1 (2015): 1–6. http://dx.doi.org/10.54207/bsmps2000-2015-8c66xq.

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Анотація:
Different types of freshening tools developed were evaluated in actual field conditions for resin tapping from Pinus caribaea trees. The developed tools were user friendly. The tools were evaluated for freshening holes made for tapping resin using bore hole technique from P. caribaea. Use of all the developed freshening tools led to increase in resin yield over control. Out of different freshening tools developed and tested, hand operated augur type tool showed appreciable increase in resin yield up to the third freshening and is recommended for use in the resin tapping operation of bore hole
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8

Rawat, Anita, S. Barthwal, and H. S. Ginwal. "Association mapping for resin yield in Pinus roxburghii Sarg. using microsatellite markers." Silvae Genetica 63, no. 1-6 (2014): 253–66. http://dx.doi.org/10.1515/sg-2014-0033.

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Анотація:
Abstract Association mapping is a method for detection of gene effects based on linkage disequilibrium (LD) that complements QTL analysis in the development of tools for molecular plant breeding. A total of 240 genotypes of Pinus roxburghii (Himalayan Chir Pine) from a natural population in Chakrata division (Tiunee range), Uttarakhand (India) were evaluated for resin yield. Based on the phenotypic data and stable resin production in consecutive years, 53 genotypes were selected after excluding the individuals with similar resin production. The selected 53 individuals were best representatives
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9

Martínez-Galván, Fredy, Julio César Buendía-Espinoza, Elisa del Carmen Martínez-Ochoa, Selene del Carmen Arrazate-Jiménez, and Rosa María García-Núñez. "Sustainable Management of Bursera bipinnata: Relationship Between Environmental and Physiological Parameters and Resin Extraction." Forests 16, no. 5 (2025): 801. https://doi.org/10.3390/f16050801.

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Анотація:
Copal is a non-timber forest product of historical, cultural, and industrial significance in Mexico. The use of unsustainable harvesting methods and a lack of understanding of the factors influencing their production have led to a decline in natural populations of resin-producing species. This study aimed to identify the dendrometric, edaphoclimatic, physiological, and resin extraction method variables with the greatest influence on resin yield in Bursera bipinnata using correlation analysis and multiple linear regression. The research was conducted in the Los Sauces micro-watershed, Morelos,
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10

Rawat, Anita, S. Barthwal, H. S. Ginwal, and S. B. Tripathi. "Association mapping for identification of ISSR and AFLP markers linked with resin yield in Himalayan Chir Pine (Pinus roxburghii Sarg." Silvae Genetica 64, no. 1-6 (2015): 220–39. http://dx.doi.org/10.1515/sg-2015-0021.

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Анотація:
AbstractIn Pinus roxburghii, marker-trait associations were studied for resin yield using a set of 238 DNA based markers derived from 9 ISSR and 5 AFLP primer pairs. A total of 240 genotypes of P. roxburghii from a natural population in Chakrata division (Tiunee range), Uttarakhand (India) were evaluated for resin yield. Based on stable resin production in consecutive years, 53 genotypes that were best representatives of the variation in resin yield (0.25 to 8.0 kg/tree/year) were used for genotyping and association analysis. For carrying out the association studies, two approaches were used.
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11

Li, Zhengchun, Luonan Shen, Qiandong Hou, et al. "Identification of Genes and Metabolic Pathways Involved in Resin Yield in Masson Pine by Integrative Analysis of Transcriptome, Proteome and Biochemical Characteristics." International Journal of Molecular Sciences 23, no. 19 (2022): 11420. http://dx.doi.org/10.3390/ijms231911420.

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Анотація:
Masson pine (Pinus massoniana L.) is one of the most important resin-producing tree species in southern China. However, the molecular regulatory mechanisms of resin yield are still unclear in masson pine. In this study, an integrated analysis of transcriptome, proteome, and biochemical characteristics from needles of masson pine with the high and common resin yield was investigated. The results showed that chlorophyll a (Chl a), chlorophyll b (Chl b), total chlorophyll (Chl C), carotenoids (Car), glucose (Glu), gibberellin A9 (GA9), gibberellin A15 (GA15), and gibberellin A53 (GA53) were signi
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12

Liu, Qinghua, Zhichun Zhou, Huihua Fan, and Yurong Liu. "Genetic Variation and Correlation among Resin Yield, Growth, and Morphologic Traits of Pinus massoniana." Silvae Genetica 62, no. 1-6 (2013): 38–43. http://dx.doi.org/10.1515/sg-2013-0005.

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Анотація:
AbstractIn breeding programs, the variations and relationships among main traits need to be understood to develop selection and breeding strategies. Resin is considered as one of most important non-timber production of P. massoniana which can privides terpenes used in the chemical industry. The present study assessed the genetic variations in growth, morphologic traits, and resin yield, as well as the phenotypic and genetic correlations between these traits of 45 half-sib families of eight-year-old Pinus massoniana trees. All traits show highly significant family effects. The individual herita
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13

Jwo, S. L., J. C. Chen, W. Y. Chen, and S. E. Hsu. "Preparation of High Char-Yield Phenolic Resins." Advanced Composites Letters 1, no. 2 (1992): 096369359200100. http://dx.doi.org/10.1177/096369359200100206.

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Анотація:
Phenolic resin synthesized by a formaldehyde/phenol(F/P) molar ratio of 1.3: 1 with different catalysts has been studied. High char yield can be obtained for the synthesized resin with NaOH or Na2CO3 catalyst at lover heating rate during carbonization the highest char yield about 71.0% was found.
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14

Fabián-Plesníková, Irenka, Cuauhtémoc Sáenz-Romero, Teresa Terrazas, et al. "Traumatic ducts size varies genetically and is positively associated to resin yield of Pinus oocarpa open-pollinated progenies." Silvae Genetica 71, no. 1 (2022): 10–19. http://dx.doi.org/10.2478/sg-2022-0002.

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Анотація:
Abstract Mexico ranks 5th in worldwide resin production. Pinus oocarpa is the most widely tapped pine tree in Mexico. Michoacán (central-western Mexico) is the first nationwide state producer of resin. Despite the P. oocarpa relevance, there is no genetic improvement program in the country for resin production. We evaluated the degree of genetic control for growth, anatomical traits, resin yield, and the correlation among them at an early age (five-years-old for growth, six for resin, and anatomical traits) in a P. oocarpa half-sib progeny trial. Families were originated from selected mother t
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15

Nimkar, Ashish, and Kulwant Sharma. "Path coefficient analysis of correlation between oleoresin yield and other characters of high resin yielders and check trees in Pinus roxburghii Sargent." Indian Journal of Forestry 27, no. 4 (2004): 331–34. http://dx.doi.org/10.54207/bsmps1000-2004-r4m5d6.

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Анотація:
Data on twenty six high resin yielders and ten check trees of Pinus roxburghii were recorded for thirteen characters namely oleoresin yield, height, diameter, grain angle, specific gravity of wood, bark percentage of wood, tracheid length, needle length, needle thickness, diameter of resin ducts, number of resin ducts, lignin percentage of wood and holocellulose percentage of wood. The simple correlation coefficient between different pairs of characters was also computed. Path analysis of simple correlation revealed that number of resin ducts, diameter of resin ducts, needle length, bark perce
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16

Nava, Andreina, Narciso Pérez, Alejandra Meza, José Velásquez, and Gladys Rincón. "EFFECT OF RESIN AND ASPHALTENE CONTENT PRESENT ON THE VACUUM RESIDUE ON THE YIELD OF DELAYED COKING PRODUCTS." Rev. LatinAm. Metal. Mat. 39, no. 1 (2019): 49–58. https://doi.org/10.5281/zenodo.7693790.

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Анотація:
The effect of resin and asphaltene concentration in the feed, on the yield of delayed coking products was assessed, feeding controlled concentrations of the groups: saturates, aromatics, resins and asphaltenes (SARA) (50-100%w/w of asphaltene or resin and a fixed mass ratio of the others groups) prepared from a Venezuelan vacuum residue. The results of yield of products obtained in a laboratory-scale process show, that the increases of concentration of resins or asphaltenes raise yield of coke and decreasesthe not-condensable. The distillates yield remained at levels close to zero (<1%w/w)
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17

Michavila Puente-Villegas, Santiago, Aida Rodríguez García, Faustino Rubio, Luis Gil, and Rosana Lopez. "Salicylic and citric acid as promising new stimulants for resin tapping in maritime pine (Pinus pinaster Ait.)." Forest Systems 29, no. 3 (2021): eSC07. http://dx.doi.org/10.5424/fs/2020293-16737.

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Анотація:
Aim of the study: We tested alternative active principles to the most widely used resin tapping stimulant which contains sulphuric acid. We also studied the effect of wounding in five-year-old Pinus pinaster seedlings with a microtapping method.Area of study: The experiment was carried out at the Universidad Politécnica de Madrid in Spain.Material and Methods: The experiment consisted of six treatments: control (no stimulant no wounding), wound (no stimulant), and pines stimulated with sulphuric acid, ethrel, salicylic acid and citric acid. We evaluated the resin yield differentiating between
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18

Beyer, David M. "The effect of chelating agents on the later break yields of Agaricus bisporus." Canadian Journal of Botany 75, no. 3 (1997): 402–7. http://dx.doi.org/10.1139/b97-043.

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Анотація:
It has been hypothesized that substances that accumulate during the mushroom cropping period are responsible for decreased yields as a mushroom crop ages. The objective of this study was to determine whether chelators added to compost substrate at spawning would affect the later break yield of Agaricus bisporus. Different types of chelators were used to determine if specific ions were involved. Supplemented compost receiving hypnum peat, IR120 (sodium saturated) cation exchange resin, ethyleneglycol tetra-acetic, and citric acid significantly increased later break yield. However, IR120 (hydrog
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19

Caglayan, İnci. "Seasonal resin production in Pinus pinaster Ait. plantations: Dendrometric and meteorological influences." BioResources 20, no. 1 (2024): 548–65. https://doi.org/10.15376/biores.20.1.548-565.

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Анотація:
The relationship between dendrometric and meteorological parameters and resin production in Pinus pinaster plantations was studied using data from 90 trees collected between June and October. Resin production was measured every 15 days over a five-month period to explore how environmental factors influence resin production rates. The correlation between diameter at breast height (DBH) ranging from 20 cm to 49 cm and total and average resin production was examined, with the goal to optimize resin harvesting practices and to understand the ecological significance of resin in these plantations. T
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20

López-Álvarez, Óscar, Rafael Zas, and Manuel Marey-Perez. "Resin tapping: A review of the main factors modulating pine resin yield." Industrial Crops and Products 202 (October 2023): 117105. http://dx.doi.org/10.1016/j.indcrop.2023.117105.

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21

Tsaktsira, Maria, Parthena Tsoulpha, Athanasios Economou, and Apostolos Scaltsoyiannes. "Mitigation of Global Climate Change through Genetic Improvement of Resin Production from Resinous Pines: The Case of Pinus halepensis in Greece." Sustainability 15, no. 10 (2023): 8052. http://dx.doi.org/10.3390/su15108052.

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Анотація:
Carbon sequestration by forests and storage in biomass has gained great interest globally in climate change mitigation. Resinous pine forests act as ideal carbon sinks because, in addition to capturing atmospheric CO2 for biomass production, they produce resin (resin concentration in C: 77.17% w/w), contributing further to the mitigation of the greenhouse effect. Greece until the 1970s was considered one of the main resin-producing countries of Europe, due to the quantity and quality of resin products collected from natural populations mainly of Pinus halepensis Mill. Previous and current rese
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22

Ang, Aikfei, Zaidon Ashaari, Edi Suhaimi Bakar, and Nor Azowa Ibrahim. "Characterisation of Sequential Solvent Fractionation and Base-catalysed Depolymerisation of Treated Alkali Lignin." BioResources 10, no. 3 (2015): 4137–51. http://dx.doi.org/10.15376/biores.10.3.4137-4151.

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Анотація:
An alkali lignin (OL) with a weight-average molecular weight (Mw) of 11646 g/mol was used to prepare low-molecular weight lignin for resin synthesis. The low-molecular weight lignin feedstock was obtained via base-catalysed depolymerisation (BCD) treatments at different combined severity factors. Sequential fractionation of the OL and BCD-treated lignins using organic solvents with different Hildebrand solubility parameters were used to alter the homogeneity of the OL. The yield and properties of OL itself and OL and BCD-treated OL dissolved in propan-1-ol (F1), ethanol (F2), and methanol (F3)
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23

Rawat, A., S. Barthwal, and H. S. Ginwal. "Comparative assessment of SSR, ISSR and AFLP markers for characterization of selected genotypes of Himalayan Chir pine (Pinus roxburghii Sarg.) based on resin yield." Silvae Genetica 63, no. 1-6 (2014): 94–108. http://dx.doi.org/10.1515/sg-2014-0013.

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Анотація:
AbstractA set of 19 SSR (Simple Sequence Repeats), 9 ISSR (Inter-Simple Sequence Repeats) and 5 AFLP (Amplified Fragment Length Polymorphism) primer combinations were used to evaluate the variability among 53 genotypes of Pinus roxburghii selected based on resin yield from the natural zone of occurrence of this species in Uttarakhand, India. The selected trees of pine varied in resin yield from 0.25 to 8 kg/year/tree. Based on the comparative assessment of SSR, ISSR and AFLP markers, SSR markers were found most polymorphic with an average PIC value of 0.327 and 2.42 alleles per marker, while I
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24

Zhou, Wei Hong, Yun Shui Yu, and Xue Liang Xiong. "Basic Properties of Woodceramics Made from Furane Resin/Wood Powder Composite." Advanced Materials Research 168-170 (December 2010): 2602–5. http://dx.doi.org/10.4028/www.scientific.net/amr.168-170.2602.

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Анотація:
A new woodceramics was developed by furane resin and wood powder. Microstructures of woodceramics were performed by scanning electron microscopy(SEM). The effect of content of furane resin on carbon yield ratio,dimension shrinkage,apparent density,comprehensive strength and volume electrical resistivity of woodceramics were investigated. The results show that the woodceramics is a kind of carbon/carbon composite composed by wood charcoal and glassy carbon, the content of furane resin has a significant effect on the microstructure of woodceramics. With the increase of furane resin, generated gl
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25

Xu, Peijun, and Xinli Jing. "High carbon yield thermoset resin based on phenolic resin, hyperbranched polyborate, and paraformaldehyde." Polymers for Advanced Technologies 22, no. 12 (2010): 2592–95. http://dx.doi.org/10.1002/pat.1806.

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26

Jacob, Sunil, Nissy Ann Harry, K. K. Binoj K. K. Binoj, Preethy Soosan Thomas, and Janey Mary Mathew. "Synthesis of Biologically Active Peptides using Newly Designed N-Vinyl Pyrrolidone Incorporated Flexible Cross linked Polystyrene." Oriental Journal Of Chemistry 38, no. 5 (2022): 1217–26. http://dx.doi.org/10.13005/ojc/380517.

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Анотація:
Synthesis of NS1 and NS2 peptide fragment of hepatitis C virus polyprotein was carried out on a terpolymer- polystyrene, N-vinylpyrrolidone, 1,6-hexanediol diacrylate resin (PS-NVP-HDDA). The radical aqueous suspension polymerisation resulted in the resin, that exhibited high swelling capacity in various solvents. The peptides were synthesized step-wise by Fmoc strategy, established with amino acid analysis and purified using HPLC. The polymer's high degree of swelling might facilitate free reagent interaction with resin-bound functional sites, resulting in an increased rate of amide bond prod
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27

Thompson, Anson E., Dennis T. Ray, Margaret Livingston, and David A. Dierig. "Variability of Rubber and Plant Growth Characteristics Among Single-plant Selections from a Diverse Guayule Breeding Population." Journal of the American Society for Horticultural Science 113, no. 4 (1988): 608–11. http://dx.doi.org/10.21273/jashs.113.4.608.

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Анотація:
Abstract Single plant selections from a diverse guayule (Parthenium argentatum Gray) breeding population were evaluated for rubber and resin concentration, rubber and resin yield, and 12 growth characteristics. Thirty-seven superior selections (≈9% of the total of 421 single plant selections) exhibit combinations of satisfactory biomass production, high rubber yield, and strong regeneration and survival after harvesting by clipping the branches at a height of 0.10 m. Rubber concentration (%) was not highly correlated with the 12 plant characteristics measured. In contrast, rubber yield (g/plan
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28

McLaughlin, Steven P. "Heritabilities of traits determining resin yield in gumweed." Journal of Heredity 77, no. 5 (1986): 368–70. http://dx.doi.org/10.1093/oxfordjournals.jhered.a110261.

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29

Ning, Yi, Yichi Chen, Mingcun Wang, Kaiyun Zhou, Tao Su, and Zhiqiang Wang. "Calixarene–based cyanate ester resin for high-temperature material." High Performance Polymers 31, no. 3 (2018): 359–66. http://dx.doi.org/10.1177/0954008318772870.

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Анотація:
p-tert-Butylcalix[4]arene-derived cyanate ester resins, both single and binary systems, were synthesized and studied for their thermal properties. The results showed that pure calixarene cyanate ester can be thermally cured at comparatively high temperature, which remains in original powder state after thermally cured. So the pure calixarene cyanate ester resin fails to meet the processing demands of resin-matrixed composite. In this work, p-tert-butylcalix[4]arene cyanate ester was chemically functionalized to have highly decreased thermal cure temperature (by copolymerization with epoxy, bis
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30

Zhou, Wei Hong, Yun Shui Yu, and Xue Liang Xiong. "Basic Properties of Woodceramics Made from Furane Resin/Bamboo Powder Composite." Advanced Materials Research 160-162 (November 2010): 1569–74. http://dx.doi.org/10.4028/www.scientific.net/amr.160-162.1569.

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Анотація:
A new woodceramics was developed by furane resin and bamboo powder. Microstructures and phase identification of woodceramics were performed by scanning electron microscopy(SEM) and X-ray diffraction(XRD). The effect of content of furane resin on carbon yield ratio，dimension shrinkage，apparent density，comprehensive strength and volume electrical resistivity of woodceramics were investigated. The results show that the woodceramics is a kind of carbon/carbon composite composed by bamboo charcoal and glassy carbon, content of furane resin has a significant effect on the microstructure of woodceram
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31

Nanos, Nikos, Wubalem Tadesse, Gregorio Montero, Luis Gil, and Ricardo Alia. "Spatial stochastic modeling of resin yield from pine stands." Canadian Journal of Forest Research 31, no. 7 (2001): 1140–47. http://dx.doi.org/10.1139/x01-047.

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Анотація:
The spatial structure of resin-yield in maritime pine stands in central Spain was studied on two different scales and with data from two tapping periods (1998 and 1999). For the fine scale, Moran's I and the K function were used to study within-stand spatial variation. We found that in one plot, trees separated by distances of less than 5 m had similar production. The K function results showed that the distribution of trees did not depart significantly from complete spatial randomness. For a much larger scale, data was available from 37 and 59 ten-tree plots for years 1998 and 1999, respective
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32

Hidayatullah, Ibnu Maulana, Frederick Soetandar, Pingkan Vanessa Sudiyasa, Patrick Cognet, and Heri Hermansyah. "Ion Exchange Resin and Entrapped Candida rugosa Lipase for Biodiesel Synthesis in the Recirculating Packed-Bed Reactor: A Performance Comparison of Heterogeneous Catalysts." Energies 16, no. 12 (2023): 4765. http://dx.doi.org/10.3390/en16124765.

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Анотація:
Ion exchange resins and immobilized lipase as heterogeneous catalysts are used to synthesize biodiesel for alternative fossil fuels. The use of ion exchange resins in the solid and activated phase can ease the separation process. Furthermore, resins can be reactivated and used repeatedly, reducing the need for catalysts. On the other hand, an immobilized enzyme is biodegradable and can catalyze the transesterification process to produce biodiesel with a lower alcohol-to-oil ratio, minimizing side reactions and impurities. Therefore, the catalysts used in this study are ion exchange resins, suc
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33

Singh, Y., M. K. Yadav, K. Singh, R. Singh, and S. Mori. "Effect of polyolefin resin-coated controlled-release iron fertilizer on yield of transplanted rice." International Rice Research Notes 32, no. 1 (2007): 32–33. https://doi.org/10.5281/zenodo.7000863.

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Анотація:
This article 'Effect of polyolefin resin-coated controlled-release iron fertilizer on yield of transplanted rice' appeared in the International Rice Research Notes series, created by the International Rice Research Institute (IRRI) to expedite communication among scientists concerned with the development of improved technology for rice and rice-based systems. The series is a mechanism to help scientists keep each other informed of current rice research findings. The concise scientific notes are meant to encourage rice scientists to communicate with one another to obtain details on the research
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34

Kartika, I. A., S. D. Sumbogo, I. Fataya, W. Trisunaryanti, Hartati, and I. Sailah. "Optimization of Calophyllum oil extraction and its application for biogasoline." IOP Conference Series: Earth and Environmental Science 1034, no. 1 (2022): 012035. http://dx.doi.org/10.1088/1755-1315/1034/1/012035.

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Анотація:
Abstract The utilization of a binary solvent, i.e. n-hexane-methanol mixture, for Calophyllum oil extraction and resin separation in a direct stage was optimized in this research. Optimum oil yield and separated resin percentage were determined using response surface method with optimizing of extraction time, temperature and stirring speed. Biogasoline production was conducted using thermal cracking at 475-575 °C of oil obtained from optimum extraction condition. The oil yield was optimized using second order polynomial model. Extraction time affected oil yield more significantly than temperat
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35

Texter, John, Naveen Kuriakose, Swaroop Shendre, Kendall Lewis, Sundar Venkatraman, and Harshit Gupta. "Stimuli-responsively porating gels by condensation." Chemical Communications 54, no. 5 (2018): 503–6. http://dx.doi.org/10.1039/c7cc06408j.

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Анотація:
A polyurethane (PU) resin derived from glycerol and hexamethylene diisocyanate and an imidazolium bromide ionic liquid chain terminator yield a stimuli-responsive resin that reversibly porates as a solvation response.
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36

Abdel-Haleem, Hussein, Steve Masterson, Aaron Sedivy, and Rob Mitchell. "Phenotypic Diversity in Cell Wall Lignocellulosic Constituents and Ethanol Yield of USDA Guayule and Mariola Germplasm." Plants 14, no. 8 (2025): 1239. https://doi.org/10.3390/plants14081239.

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Анотація:
Guayule (Parthenium argentatum A. Gray) is a valuable domestic source for rubber and resin. At its center of origin in the Northern Mexico and Southern Texas deserts, guayule, a perennial shrub, is hybridized with its relative species mariola (Parthenium incanum Kunth). As rubber and resin are the main products derived from guayule, there is interest in using guayule bagasse as a bioenergy feedstock to meet the growing bioenergy and biofuel demands. This study aimed to explore and characterize phenotypic diversity in cell wall constituents (lignin, cellulose, and hemicellulose) and their yield
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37

Chen, Zhi Qin, Wei Jun Zeng, Yang Fei Chen, Wen Kui Li, and Hong Bo Liu. "Comparative Study of Thermal Degradation Behavior of High Char Yield Phenolic Resin and Commercial Resin." Key Engineering Materials 500 (January 2012): 94–97. http://dx.doi.org/10.4028/www.scientific.net/kem.500.94.

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Анотація:
The thermal degradation behavior of high char yield phenolic resin (PF1.2) synthesized by us was investigated, in comparison with that of commercial resin (PF1.5), using TGA and13C-NMR techniques. It was found that the degradation process of PF1.2behaved very similar to that of PF1.5during heat treatment up to 700 °C under N2atmosphere, but resulted in a somewhat different extent of some specific reactions. That was, although the reactions occurring up to 700 °C were dominated by crosslinking and/or polyaromatization, fewer methyl bonds from breaking of methylene bridges were formed in PF1.2th
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38

Zhao, Li Chun, Ting Liu, and Di Liu. "Experimental Research on Ion Exchange Technique to Extract Inositol from Defatted Rice Bran." Advanced Materials Research 962-965 (June 2014): 1217–21. http://dx.doi.org/10.4028/www.scientific.net/amr.962-965.1217.

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Анотація:
In order to solve the problem of the long production cycle and low yield of traditional inositol production process, we made several researches based on the traditional process. We experimented on the following methods to obtain a high yield qualified products: microwave-assisted phytin extraction, ion-exchange resin phytic acid absorption, elution of weak alkaline into phytate, atmospheric pressure enzymatic hydrolysis of phytate, ion exchange resin filtration, bleaching, further concentration, crystallization and refinement of hydrolysate.
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39

Moeller, K., and C. Lindholst. "Sanctioning Large-Scale Domestic Cannabis Production - Potency, Yield, and Professionalism." Scandinavian Journal of Forensic Science 20, no. 1 (2014): 20–27. http://dx.doi.org/10.2478/sjfs-2014-0002.

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Abstract Domestically cultivated cannabis, referred to as sinsemilla, constitutes a growing share of the illicit drug markets in the Scandinavian countries. In this study we present forensic evidence of THC content in sinsemilla and resin confiscated by the Danish police from 2008 to 2012. The purpose is to establish a mean potency, a yield estimate for professionally grown plants, and an assessment of how „professionalism” applies to domestic cultivation. We find a mean THC content in our sample normally distributed around 12% for sinsemilla (n=35) and 11.7% for resin (n=99). This is markedly
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40

Moore, P. P., and J. W. Hanover. "Variation in Yield of Blue Spruce Monoterpenes Associated with Crown Position and Frequency of Resin Canals." Forest Science 33, no. 4 (1987): 1081–88. http://dx.doi.org/10.1093/forestscience/33.4.1081.

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Анотація:
Abstract Large differences were found in the yield of monoterpenes from xylem, bark, and needles of blue spruce (Picea pungens Engelm.). Yields were greatest from bark samples and least from xylem. There were significant differences among trees in yield for all tissues. Yield of xylem and needle but not bark monoterpenes varied with position in the crown. Yields of total monoterpenes in xylem and needle samples were highly correlated with the proportion of resin canals in these tissues. Needle and bark extracts showed significant among-tree differences in the relative concentrations of most mo
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41

Kumar, Pawan, R. K. Gupta, Ashu Chandel, Bhupender Dutt, Subhash Sharma, and Sukhdeep Kaur. "Forecasting of Resin Yield and Number of Blazes of Naturally Regenerated Chir Pine (Pinus roxburghii Sargent) in Himachal Pradesh by Using Single Exponential Smoothing Method." International Journal of Environment and Climate Change 13, no. 9 (2023): 3294–99. http://dx.doi.org/10.9734/ijecc/2023/v13i92581.

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Анотація:
The present investigation entitled “Forecasting of resin yield and number of blazes of naturally regenerated chir pine (Pinus roxburghii Sargent) in Himachal Pradesh by using single exponential smoothing method” was carried out during the year 2020-2022. The secondary information was collected regarding the resin yield and number of resin blazes w.e.f. 2005 to 2022 from Himachal Pradesh State Forest Department. Exponential smoothing is a particular moving average technique applied to time series data and to produce smoothed data to make forecast. In exponential smoothing, one or more smoothing
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42

Latigo, G. V., J. Smart, J. O. Bradford, and J. O. Kuti. "Performance of Arizona and California Guayule Lines in Southern Texas." HortScience 30, no. 4 (1995): 795D—795. http://dx.doi.org/10.21273/hortsci.30.4.795d.

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Анотація:
Guayule (Parthenium argentatum Gray) is a promising alternative to (Hevea brasiliensis Muell. Arg.) for rubber production in semiarid regions. Substantial improvement in yield is needed to establish guayule as a competitive source of natural rubber. A 4-year field study was conducted on a dryland site in southern Texas to evaluate productivity of selected guayule breeding lines from Arizona and California. Plants were harvested at the age of 22, 34, and 46 months and analyzed for dry weight, resin content, rubber content, resin yield, rubber yield, and percent mortality. While significant diff
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43

Садыгов Ф. М., Магеррамова З. Ю., Гаджиев Г. Н., Гасан-заде Г. Г., Мамедова И. Г. та Меликова Э. Т. "ВЛИЯНИЕ ТЕХНОЛОГИЧЕСКОГО РЕЖИМА УСТАНОВКИ ТЕРМИЧЕСКОГО ПИРОЛИЗА УГЛЕВОДОРОДОВ НА КАЧЕСТВЕННЫЙ СОСТАВ ТЯЖЁЛОЙ СМОЛЫ". World Science 1, № 1(41) (2019): 29–35. http://dx.doi.org/10.31435/rsglobal_ws/31012019/6295.

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Анотація:

 
 
 
 The dependence of the yield and composition of the heavy pyrolysis resin on the initial hydrocarbon feedstock and the process conditions is investigated. The variation of technological parameters within certain limits leads to a change in the content of low molecular weight olefins in the gaseous pyrolysis products, as well as the qualitative and quantitative composition of by-product liquid products. As a result of the research, the optimum process conditions for the pyrolysis of straight-run gasoline were determined, which, with the maximum conversion of hydrocarb
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44

Zhang, Jian, Jia Liu, Can Feng Wang, Fa Rong Huang, and Lei Du. "Synthesis and Characterization of SAR/SiO2 Hybrid Materials with High Thermal Stability." Advanced Materials Research 211-212 (February 2011): 571–75. http://dx.doi.org/10.4028/www.scientific.net/amr.211-212.571.

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Анотація:
A silicon-containing arylacetylene resin, poly[(dimethylsilyl)eneethynylene phenyleneethynylene] with methoxy silyl terminal group (abbreviated MSAR) was synthesized. The resin and tetraethoxysilane (abbreviated TEOS) were used to prepare silicon-containing arylacetylene resin (abbreviated SAR) /SiO2 hybrid materials by a sol-gel method. Both the curing process of the xerogel and thermal properties of the hybrid materials were studied by FT-IR, DSC and TGA. The thermogravimetric analysis of the hybrid materials showed that Td5 (temperature of 5% weight loss) was 696°C and char yield was 92.1%
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45

Huang, Yuan Bo, Zhi Feng Zheng, Hao Feng, and Hui Pan. "Phenolic Foam from Liquefied Products of Walnut Shell in Phenol." Advanced Materials Research 236-238 (May 2011): 241–46. http://dx.doi.org/10.4028/www.scientific.net/amr.236-238.241.

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Анотація:
The resol-type resin was prepared with a high yield from the liquefied products of walnut shell in phenol, which was reacted with formaldehyde under low alkaline conditions. The effects of reaction temperature and time on the yield and viscosity of the resol resin were investigated. Results showed that the optimum resol resinification conditions were a reaction temperature of 80°C and a reaction time of 2 h. The biomass-based resol resin from liquefied products of walnut shell was successfully applied to produce phenolic foam with diisopropyl ether as the blowing agent, Tween 80 as the surfact
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46

Chen, Zhi Qin, Wei Jun Zeng, Yang Fei Chen, Wen Kui Li, and Hong Bo Liu. "Influence of F/P on Structure and Thermal Property of Phenolic Resin." Key Engineering Materials 500 (January 2012): 98–103. http://dx.doi.org/10.4028/www.scientific.net/kem.500.98.

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Анотація:
The influence of F/P on structure and thermal property of resin was studied. Six resins were synthesized with different molar ratios of F/P. These resins were cured by means of temperature and without catalyst. The characterization of the resin was done by Fourier transform infrared spectroscopy (FTIR), thermo gravimetric analysis (TGA) and differential thermo gravimetric analysis (DTG). From the thermal properties of fully cured resins, characteristic properties including pyrolysis temperature and char yield were obtained. A maximum in the benzene ring substitutions, methylene bridge and the
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47

Chakraborty, Souvik, Saikat Saha, V. R. Dhanak, et al. "High yield synthesis of amine functionalized graphene oxide and its surface properties." RSC Advances 6, no. 72 (2016): 67916–24. http://dx.doi.org/10.1039/c6ra12844k.

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48

Pillai, V. N. Rajasekharan, and C. Arunan. "Solid-Phase Synthesis of Hydrophobic Peptides on 1,6-Hexanediol Diacrylate Crosslinked Polystyrene Resin: Comparison with Merrifield Resin." Protein & Peptide Letters 6, no. 6 (1999): 391–98. http://dx.doi.org/10.2174/092986650606221117152155.

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Анотація:
Abstract: A novel polymer support based on 1,6-hexanediol diacrylate and polystyrene was developed. The resin showed better solvation in solvents used for peptide synthesis than Merrifield resin. The synthetic utility of the new support has been illustrated with the synthesis of some hydrophobic peptides which have high affinity for aggregation. The yield and purity of the peptides were high compared to when Merrifield resin was used.
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49

Elshikha, Diaa Eldin M., Peter M. Waller, Douglas J. Hunsaker, et al. "Water Use, Growth, and Yield of Ratooned Guayule under Subsurface Drip and Furrow Irrigation in the US Southwest Desert." Water 15, no. 19 (2023): 3412. http://dx.doi.org/10.3390/w15193412.

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Анотація:
Guayule (Parthenium argentatum, A. Gray) is a perennial desert shrub with ratoon-cropping potential for multiple harvests of its natural rubber, resin, and bagasse byproducts. However, yield expectations, water use requirements, and irrigation scheduling information for ratooned guayule are extremely limited. The objectives of this study were to evaluate dry biomass (DB), contents of rubber (R) and resin (Re) and yields of rubber (RY) and resin (ReY) responses to irrigation treatments, and develop irrigation management criteria for ratooned guayule. The water productivity (WP) of the yield com
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50

Pajak, Janusz, Grzegorz Labojko, and Andrzej Lachowski. "Activated Carbons from Crosslinked Novolac Resin." Adsorption Science & Technology 23, no. 5 (2005): 381–86. http://dx.doi.org/10.1260/026361705774355441.

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Анотація:
Activated carbons were prepared from well-characterized Novolac resin cured with various amounts of hexamethylenetetramine (HMTA). The process consisted of curing the resin with HMTA at 200°C, carbonization in nitrogen at 600°C and gasifying the char in carbon dioxide or in steam at 900°C. The influence of the amount of HMTA used for curing on the yield and the characteristics of the activated carbon was investigated. The pore volume attained a maximum for Novolac initially cured with ca. 2 wt% HMTA. Further increase in the amount of HMTA used for curing resulted in an increase in the yield of
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