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  • Open Access


    Preparation and Characterization of Carbon Microspheres From Waste Cotton Textiles By Hydrothermal Carbonization

    Yongfang Zhang1,2, Wensheng Hou1, Hong Guo1, Sheng Shi1, Jinming Dai1,2,*

    Journal of Renewable Materials, Vol.7, No.12, pp. 1309-1319, 2019, DOI:10.32604/jrm.2019.07884

    Abstract Carbon microspheres were prepared from waste cotton fibers by hydrothermal carbonization (HTC) with the addition of copper sulphate in this work. The important influence factors, temperature, concentration of copper sulphate, resident time were explored here. The smooth and regular carbon microspheres could be formed at 330°C with 0.15 wt% copper sulphate after 6 h from waste cotton fibers. The crystal structures of cotton fibers were destructed in a short resident time with 0.15 wt% copper sulphate from SEM images and XRD patterns of solid products. This strategy provides a new, mild and efficient method to… More >

  • Open Access


    Effects of various continuous cropping times on soil nematode structure in cotton fields of Xinjiang, China

    Li XL1,2, YC Wang3, CA Busso4, JS Xiang1, AM Zhang1, YW Qu1, Y Liu2

    Phyton-International Journal of Experimental Botany, Vol.85, pp. 27-35, 2016, DOI:10.32604/phyton.2016.85.027

    Abstract Long-term continuous cropping of cotton had led to substantial agricultural losses. However, continuous cotton cropping could maintain high crop yields for many years in some areas. The composition and structure of soil nematode communities were investigated to explore the effect of continuous cropping and soil depths on these communities. Soil samples were collected at two soil depths (0-20 cm and 20-40 cm) from cotton fields with a history of 5, 10, 15 or 20 years of continuous cotton cropping in the Karamay region. The results showed that 36 genera were found. Significant differences in the… More >

  • Open Access


    Nitrate reductase activity, biomass, yield, and quality in cotton in response to nitrogen fertilization

    Hernández-Cruz AE1, E Sánchez2*, P Preciado-Rangel1, M L García-Bañuelos2, A Palomo-Gil1, A Espinoza-Banda1

    Phyton-International Journal of Experimental Botany, Vol.84, No.2, pp. 454-460, 2015, DOI:10.32604/phyton.2015.84.454

    Abstract In the production of cotton (Gossypium hirsutum L.), nitrogen fertilization is one of the most costly crop practices, but important to reach high yields. However, high nitrogen (N) content in plants does not always translate into a high fibre production. One way of assessing the efficiency of the N fertilizer is through the enzymatic activity of the nitrate reductase (NR). This is a key enzyme in N assimilation, whose activity is regulated by a number of endogenous and exogenous factors that determine yield. The aim of this study was to assess the effect of N fertilization… More >

  • Open Access


    Cotton production with high sowing densities using organic fertilization

    López Martínez JD1, E Salazar Sosa1, HI Trejo-Escareño1, JL García Hernández1, M Navarro Morones2, C Vázquez-Vázquez1

    Phyton-International Journal of Experimental Botany, Vol.83, pp. 237-242, 2014, DOI:10.32604/phyton.2014.83.237

    Abstract The Laguna Region located in the states of Durango and Coahuila, Mexico, is the main cow milk production region of Mexico. Here there are about 500000 heads of cattle. This region produces about 1.2 million tons of cattle manure annually, which allows raising the possibility of their use in agriculture. Treatments evaluated in this study were: plant density (120000 and 240000 plants/ha), solarized cattle manure (0, 40, 80, 120 t/ha), and an additional chemical treatment of 120-60-00 kg/ha of nitrogen, phosphorus and potassium, respectively. A randomized block design with a strip arrangement was used. Three More >

  • Open Access


    Herbicide combinations to control the weed seedbank in an upland cotton field

    Pereira JR1, AE Duarte2, JB Pitombeira3, MAP da Silva2, NE de M Beltrão1, LM Barros2

    Phyton-International Journal of Experimental Botany, Vol.82, pp. 275-279, 2013, DOI:10.32604/phyton.2013.82.275

    Abstract An experiment was conducted in dryland conditions of the Brazilian Northeast to determine the number of viable weed seeds (seedbank) in an upland cotton crop, and its distribution in the soil profile, before and after using various herbicide treatments. A randomized block design in a split-plot block scheme with 6 replications was used, where the main plots were constituted by a factorial (13 treatments and 2 sampling soil depths), and the subplots by 2 sampling dates. The seedbank was determined by germination of the recovered weed seeds obtained from different soil depths. The highest number More >

  • Open Access


    Physiological changes in transgenic cotton inoculated with Trichoderma spp.

    Vargas-Bejarano E, V Méndez-Trujillo, JC Vázquez Angulo, D González-Mendoza, O Grimaldo Juarez

    Phyton-International Journal of Experimental Botany, Vol.81, pp. 101-105, 2012, DOI:10.32604/phyton.2012.81.101

    Abstract We performed the inoculation of transgenic cotton seedlings with Trichoderma sp. strain ICA 4 to evaluate its effects on the physiological development of seedlings. Inoculated seedlings of transgenic cotton had higher development than non-inoculated seedlings. The range of values for relative growth, doubling time, height and number of leaves (0.04 g/g d; 16.88 days; 17.16 cm and 4.2, respectively) were significantly higher that those observed in non-inoculated plants (0.03 g/g day; 24.38 days; 12.33 cm and 2.6, respectively). Regarding radical architecture, inoculated seedlings with Trichoderma strain ICA 4 showed a higher percentage of roots of 2nd (46%), More >

  • Open Access


    Growth analysis of three varieties of cotton (Gossypium hirsutum L.) in an arid region of Mexico

    Orozco-Vidal JA1, P Yescas-Coronado1, MA Segura-Castruita1, R Valdez-Cepeda2, E Martínez-Rubín de Celis1, JA Montemayor-Trejo1, M Fortis-Hernández1, P Preciado-Rangel1

    Phyton-International Journal of Experimental Botany, Vol.80, pp. 47-52, 2011, DOI:10.32604/phyton.2011.80.047

    Abstract The development of three cotton varieties was evaluated through the growth analysis technique. Study varieties were two of normal leaf (Cian Precoz and NuCotton 35B) and the other of okra leaf (Fiber Max 832). Vegetative and reproductive samplings effected at different days after planting (dap) allowed us to determine the (1) growth dynamics, (2) production efficiency and (3) the biomass distribution of the three cotton varieties. Seeding was conducted following the production system of narrow rows (0.76m, between rows; 0.20m between plants) to obtain a plant density of 65500 plants/ha. Varieties were distributed in a… More >

  • Open Access


    Green Synthesis of Bimetallic Nanoparticles From Prosopis juliflora (Sw) DC., and Its Effect Against Cotton Mealybug, Phenacoccus solenopsis (Hemiptera: Pseudococcidae)

    V. Mendez-Trujillo1, B. Valdez-Salas2, M. Carrillo-Beltran2, M. A. Curiel-Alvarez2, O. Tzintzun-Camacho3, C. Ceceña-Duran3 and D. Gonzalez-Mendoza3,*

    Phyton-International Journal of Experimental Botany, Vol.88, No.3, pp. 269-275, 2019, DOI:10.32604/phyton.2019.07316

    Abstract Phenacoccus solenopsis has been recognized as an aggressively invasive species on cotton plants in different countries. This study was conducted to investigate the effect of green synthesized Cu/Zn-nanoparticles using aqueous leaf extract of Prosopis juliflora (mezquite) against P. solenopsis. The scanning electron microscope (SEM) showed bimetallic nanoparticles of Cu/Zn-NPs with spherical shape with varying size of 74.33 nm to 59.46 nm. More than 30% mortality of P. solenopsis was observed with Cu/Zn-nanoparticles (100 ppm) at 96 hours after treatment. Negligible mortality of P. solenopsis was recorded with Cu/Zn solution (100 ppm) and aqueous P. juliflora More >

  • Open Access


    Preparation of Antibacterial Cotton Wound Dressing By Green Synthesis Silver Nanoparticles Using Mullein Leaves Extract

    S. Najmeh Aboutorabi1, Majid Nasiriboroum,2,*, Pourya Mohammadi1, Hassan Sheibani1,*, Hossein Barani3

    Journal of Renewable Materials, Vol.7, No.8, pp. 787-794, 2019, DOI:10.32604/jrm.2019.06438

    Abstract Silver nanoparticles (AgNPs) were synthesized by a bio-reduction method using an aqueous extract of mullein leaves (Verbascum thapsus L.) functioning as reducing as well as a stabilizing agent. Various synthesis parameters such as reaction time, temperature and concentration of the extract were also studied for the synthesis of AgNPs. The so prepared AgNPs were characterized by various techniques including UV-Vis spectroscopy, X-ray diffraction, scanning electron microscopy (equipped with energy dispersive analysis of X-rays), and transmission electron microscopy. The electron microscopy images suggest the formation of polydispersed spherical AgNPs with average particle size of about 20 More >

  • Open Access


    Synthesis and Thermal Characterization of Polyurethanes Obtained from Cottonseed and Corn Oil-Based Polyols

    Karina Cruz-Aldaco1, Erika Flores-Loyola2, Cristóbal Noé Aguilar-González1, Nuria Burgos3, Alfonso Jiménez3*

    Journal of Renewable Materials, Vol.4, No.3, pp. 178-184, 2016, DOI:10.7569/JRM.2016.634107

    Abstract The use of vegetable oils to replace fossil feedstock has become an area of opportunity and a priority for study in the field of polymer science. Vegetable oils are considered as renewable resources with high potential, low cost and full availability. The aim of this study is the synthesis of biobased polyols from cottonseed oil (Gossypium barbadanse) and corn oil (Zea mays) as feedstock. Their synthesis was successfully performed, as can be concluded from the determination of their hydroxyl index as well as the structural and thermal characterization carried out in this work. Polyurethanes from More >

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