Dimeric products of the degradation of cotton lignin and rice hulls

1990 ◽  
Vol 26 (1) ◽  
pp. 76-77
Author(s):  
L. S. Smirnova ◽  
S. Mukhamedova ◽  
Kh. A. Abduazimov
Keyword(s):  
Rice Hulls ◽  
Cotton Lignin

Silicon Tetrachloride Synthesis from Rice Hulls: Transmission and Scanning Electron Microscope Study

1972 ◽  
Vol 30 ◽  
pp. 236-237 ◽  
Author(s):  
Richard S. Thomas ◽  
Prabir K. Basu ◽  
Francis T. Jones
Keyword(s):  
Silicon Tetrachloride ◽  
Silica Sand ◽  
Mineral Matter ◽  
Chemical Heterogeneity ◽  
Scanning Electron Microscope Study ◽  
Rice Hulls ◽  
Hull Structure ◽  
Lower Temperature ◽  
Image Position ◽  
Disposal Problem

Silicon tetrachloride, used in industry for the production of highest purity silicon and silica, is customarily manufactured from silica-sand and charcoal.SiCl4 can also be made from rice hulls, which contain up to 20 percent silica and only traces of other mineral matter. Hulls, after carbonization, actually prove superior as a starting material since they react at lower temperature. This use of rice hulls may offer a new, profitable solution for a rice mill byproduct disposal problem.In studies of the reaction kinetics with carbonized hulls, conversion of SiO2 to SiCl4 was found to proceed within a few minutes to a constant, limited yield which depended reproducibly on the ambient temperature of the reactor. See Fig. 1. This suggested that physical or chemical heterogeneity of the silica in the hull structure might be involved.

scholarly journals The Use of Rice Hulls for Sustainable Control of NOxEmissions in Deep Space Missions

2003 ◽  
Vol 42 (8) ◽  
pp. 1813-1820 ◽  
Author(s):  
X. H. Xu ◽  
Y. Shi ◽  
D. Kwak ◽  
S. G. Chang ◽  
J. W. Fisher ◽  
...  
Keyword(s):  
Space Missions ◽  
Deep Space ◽  
Rice Hulls

Influence of the processing method on the heat resistance of the secondary block copolymer of propylene and ethylene filled with rice hulls

2021 ◽  
Vol 11 ◽  
pp. 32-38
Author(s):  
A. R. Sadritdinov ◽  
◽  
E. M. Zakharova ◽  
A. A. Psyanchin ◽  
A. G. Khusnullin ◽  
...  
Keyword(s):  
Block Copolymer ◽  
Injection Molding ◽  
Heat Resistance ◽  
Polymer Composites ◽  
Softening Temperature ◽  
Mechanical Action ◽  
Decomposition Temperature ◽  
Inert Atmosphere ◽  
Rice Hulls ◽  
Molding Method

Polymer composites based on secondary thermoplastic polymers filled with biodegradable components of plant origin was developed. Repeated thermal and mechanical action on polymers during their processing in the presence of dispersed phase particles leads to a change in the thermophysical and strength characteristics of finished products. The paper studies the regularities of changes in the heat resistance of polymer composites based on a secondary block copolymer of propylene and ethylene, and rice husks, processed by injection molding and pressing. It is shown that filling the secondary polymer with rice hulls leads to an increase in the heat resistance of composites, which is characterized by an increase in the bending temperature under load, Vicat softening temperature, and decomposition temperature during thermogravimetric analysis in an inert atmosphere. Compared to the injection molding method, the processing of polymer composites by pressing makes it possible to obtain more heat-resistant plastic products. Obviously, this is due to the different degrees of crystallinity of the polymer phase. The high cooling rate of the polymer composite melt during the filling of the injection mold reduces the time required for the corresponding change in the conformation of macromolecules and the formation of the crystalline phase. As a consequence, an increase in the content of the amorphous phase of the secondary block copolymer of propylene and ethylene decreases the heat resistance of the prototypes.

249 Increasing Structural Fiber Improves Growth Performance of Nursery Pigs

2021 ◽  
Vol 99 (Supplement_1) ◽  
pp. 93-93
Author(s):  
Sara Ebarb ◽  
Sabrina May ◽  
Mark D Newcomb
Keyword(s):  
Growth Performance ◽  
Mixed Model ◽  
Linear Mixed Model ◽  
Two Phase ◽  
Nursery Pigs ◽  
High Fiber ◽  
Rice Hulls ◽  
Fiber Treatment ◽  
Wheat Middlings

Abstract Fiber ingredients in swine diets have various components that affect the intestinal tract distinctively. The objective of this study was to determine the effect of structural fiber sources on growth performance of nursery pigs. A total of 1,760 weanling pigs (initial BW = 6.12 ± 0.3 kg, 16 reps/trt, 22 pigs/pen) were used in a study with 5 dietary treatments: 1) Complex nursery diet with no additional fiber (CON); 2) CON + 2% rice hulls; 3) CON + 4% rice hulls; 4) CON + 6% wheat middlings; 5) CON + 12% wheat middlings. Fiber ingredients were added at the expense of corn and some processed soybean meal to maintain similar dietary protein levels. Using an in vitro fermentation estimation of fermentation for rice hulls and wheat middlings, diets were constructed to add similar levels of structural (non-fermentable NDF) fiber between low and high additions of rice hulls and wheat middlings. Pens across two barns were randomly allotted independent of one another and within a location block to one of the five treatments on d 0 of a two-phase study (d 0–11 and d 11–20.5 post-weaning). Data were analyzed by general linear model in R. Mortality and removal data were analyzed as a generalized linear mixed model with a binomial distribution. Contrasts tested the effect of additional fiber (CON vs treatments 2–5), effect of medium vs high fiber (treatment 2/4 vs 3/5), effect of source of fiber (treatment 2/3 vs 4/5), and the interaction of level and source of fiber. Overall (Table 1), additional fiber resulted in increased ADFI (P < 0.05) and tended to increase ADG (P < 0.10). Probability of mortality and removal was reduced (P < 0.05) when additional fiber was included. In summary, increasing the level of structural fiber improved performance and livability of nursery pigs.

scholarly journals Comparative Population Growth of the Psocid Liposcelis yunnaniensis (Psocoptera: Liposcelididae) on Different Diets

2010 ◽  
Vol 2 ◽  
pp. IJIS.S4590 ◽  
Author(s):  
M.W. Hassan ◽  
W. Dou ◽  
H.B. Jiang ◽  
J.J. Wang
Keyword(s):  
Triticum Aestivum ◽  
Population Growth ◽  
Avena Sativa ◽  
Zea Mays L ◽  
Triticum Aestivum L ◽  
Artificial Diets ◽  
Relative Level ◽  
Rice Hulls ◽  
Hulled Barley ◽  
Comparative Population

In this study, we investigated the population growth of the Liposcelis yunnaniensis (Psocoptera: Liposcelididae) feeding on ten different diets. Out of the ten diets, eight were made of plain cereals namely wheat ( Triticum aestivum L.), corn ( Zea mays L.), barley ( Hordeum vulgar L.), oats ( Avena sativa L.), rice ( Oryza sative L.), and sorghum ( Sorghum bicolour L.) while two were the artificial diets named Nayak wheat diet and Universal diet. The population growth was recorded as corn > wheat > universal diet > hulled barley > rice (hulls intact) > barley (hulls intact) > sorghum > Nayak wheat diet > oats > hulled rice. After 32 d culture, the initial 5 psocids developed to the populations as 41.8 ± 4.26, 41.5 ± 4.09 and 39.1 ± 7.64 on corn, wheat and universal diet, respectively. Meanwhile, psocids feeding on Nayak wheat diet, oats and hulled rice had significantly lower populations with 25.6 ± 2.42, 22.5 ± 3.09 and 13.6 ± 2.36 respectively. Rice and barley were included in the diets with and without hulls to see their effect on population growth. In case of barley, hulls had no significant effect on population growth while rice with hulls had significantly higher populations than rice alone. This study has confirmed the relative level of suitability of different cereals for this species when damaged. We have described a method to get the uniform age adults that can be helpful in research experiments.

Extraction and Characterization of Papilla-like Biosilica from Rice Hulls

2009 ◽  
Vol 27 (6) ◽  
pp. 1031-1034
Author(s):  
Xiaodong ZHANG ◽  
Jing SUN ◽  
Jiaqi ZHUANG ◽  
Wensheng YANG
Keyword(s):  
Rice Hulls

scholarly journals Synthesis of Silicon Carbide from Coked Rice Hulls and Coked Bamboos.

1995 ◽  
Vol 111 (8) ◽  
pp. 559-563 ◽  
Author(s):  
Hironori HAMASAKI ◽  
Hiroshi TATEYAMA ◽  
Kunio KIMURA ◽  
Kazuhiko JINNAI
Keyword(s):  
Silicon Carbide ◽  
Rice Hulls

scholarly journals Biology and bulb production of Eleutherine bulbosa (Iridaceae), a native species from Borneo, Indonesia

2021 ◽  
Vol 27 (2) ◽  
pp. 232-237
Author(s):  
Ni Made Armini Wiendi ◽  
Nessa Maulida ◽  
Krisantini Krisantini
Keyword(s):  
Native Species ◽  
Leaf Size ◽  
Fertilizer Application ◽  
Ornamental Plant ◽  
Rice Hulls ◽  
Secondary Axis ◽  
Size Number ◽  
Wild Harvesting ◽  
Npk Fertilizer ◽  
Shoot Emergence

Abstract Eleutherine bulbosa is a known ornamental plant of the Iris family, which originated from Central Borneo, Indonesia. The bulbs of E. bulbosa have long been used as a medicinal source by the local people of Borneo. Despite its known medicinal and other values, studies on the morphology and efficiency in bulb production of this species are limited. The aims of our study are to examine the vegetative and reproductive morphology of E. bulbosa, and to determine the effect of various dosages of NPK fertilizer on flowering and bulb production. The plants were grown in pots using potting mix consists of equal volume of burnt rice hulls, cocopeat, and organic manures (1:1:1). Our study showed that E. bulbosa has a cymose rhipidium inflorescence with 25-50 mm long peduncles, have 3-4 umbel on the secondary axis, each consists of 10-12 florets that opens in turn every day. Florets are 20-30 mm long, 20 mm in diameter, 10-15 mm pedicels, and short-lived. The perianth is white, about 25 mm wide with yellow anthers and stigma. Fruits were not formed during the duration of the study. NPK fertilizer application at the lowest dose of 1 g per pot had promoted earlier shoot emergence and vegetative growth, including plant height, leaf number, leaf size, number of tillers, and bulb production compared to control (no fertilizer). Application of fertilizer at 1 and 2 g per plant significantly promoted earlier flowering, whereas application at 3 g per plant delayed and reduced the proportion of flowering plants. The results of this study can aid in taxonomic identification and efficient cultivation of this plant for uses as potted flowering ornamentals or bulb production for different purposes. Higher cultivation and reduced wild harvesting can result in the conservation of this species.

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