scholarly journals HEMP GROWTH AND FIBRE PROCESSING POSSIBILITIES IN LATVIA

2012 ◽  
Vol 1 (4) ◽  
pp. 42
Author(s):  
Ilze Baltiņa ◽  
Zaiga Zamuška ◽  
Veneranda Stramkale ◽  
Guntis Strazds
Keyword(s):  
Tensile Strength ◽  
Agricultural Research ◽  
Raw Materials ◽  
Animal Health ◽  
Research Work ◽  
Climatic Conditions ◽  
Research Centre ◽  
High Tensile Strength ◽  
Hemp Fibre ◽  
Hemp Fibres

Use of hemp fibre is rapidly increasing in Europe. This tendency is related to carbon and glass fibre substitution with recycled and biodegradable raw materials for use in car production. Scientists and manufacturers work to obtain new composite materials where hemp fibre will be as reinforcement. Hemp fibres are light and with high tensile strength comparing with other technical fibres. Advantage – eco–friendly utilization possibilities. The research work to determine hemp fibre efficiency was carried out for two years at the Latgale Agricultural Research Centre. In this work different hemp fibre varieties were used. To determine the most suitable varieties for Latvian climatic conditions all the varieties were tested at the laboratories of Riga Technical University, Institute of Textile Material Technologies and Design. We are looking for new possibilities to make technical textile samples from different hemp fibre varieties. In cooperation with Laboratories of the Scientific Institute of Food Safety, Animal Health and Environment “BIOR” the amount of tetrahydrocannabinol (THC) in different variety cannabis plants were determined. It was concluded that amount of THC of different open–air cultivation varieties grown in Latvia is different but anyway this amount is much below the acceptable norm.

The Development of Hemp Fibre Nonwovens

2015 ◽  
Vol 1117 ◽  
pp. 227-230
Author(s):  
Uljana Iljina ◽  
Ilze Baltina ◽  
Stephen Russell
Keyword(s):  
Surface Modification ◽  
Electrical Properties ◽  
Metal Oxide ◽  
Metal Oxide Nanoparticles ◽  
Research Work ◽  
Oxide Nanoparticles ◽  
Hemp Fibre ◽  
Hemp Fibres

Hemp fibre nonwovens are developed in the research work with a goal to the materials surface modification applying metal and metal oxide nanoparticles. It is planned to investigate the electrical properties of nonwovens to determine their ability to serve as radiation insulation. Fibres cut into 5 cm long, some of them passed through Laroche Cadette equipment twice that opens the fibres and part manually combed before making nonwovens. Carded webs formed from prepared fibres by parallel-laid carding method. The fibres opened by using Laroche Cadette equipment formed web only by mixing hemp fibres with 15% Tencel fibres. Clean hemp fibres webs created from manually combed fibres. Hemp fibres nonwovens created by using hydroentanglement method.

scholarly journals Selection of Adaptive Agricultural Technologies in Digital Agriculture

2019 ◽  
pp. 51-61
Author(s):  
Andrey V Gostev ◽  
Aleksey I Pykhtin ◽  
Roman V Popadinets
Keyword(s):  
Agricultural Research ◽  
Field Trials ◽  
Climatic Conditions ◽  
Research Centre ◽  
Reference Database ◽  
Winter Rye ◽  
Agricultural Producers ◽  
Agricultural Technologies ◽  
Agricultural Enterprises ◽  
Selection Of

As follows from the analysis of the collected experimental material of long-term field trials of the Kursk Federal Agricultural Research Centre and generalization of the activities results of leading domestic research and educational institutions, as well as the practical results of many agricultural enterprises of the eastern part of Europe, we have identified the most effective conditions for the use of basic agricultural methods in wheat cultivation technologies as well as spring and winter barley, seed peas, buckwheat, grain maize, oats, millet and winter rye cultivation technologies of different levels of intensity which contribute to the rational use of available resources of agricultural producers based on the prevailing soil and climatic conditions. The technologies made it possible to prepare scientific-methodological approaches and a mathematical model to solve the problems of selecting an adaptive technology of crops cultivation. A normative-reference database for different types of crops cultivation technologies has also been made, including a list of zoned recognized varieties and hybrids of crops under study, necessary technology methods taking into account conditions of their effective use. Currently, an algorithm and the corresponding software are being developed to choose the most expedient technology of crop cultivation for specific soil and climatic conditions depending on a set of defining factors. There has been created software (in the form of a complex of programs for stationary computers and mobile electronic devices with the Android operating system. A specialized website has been developed. It provides a scientifically well-grounded selection of crops varieties and hybrids for the eastern part of Europa on the basis of user-specified conditions.

scholarly journals Assessment of different rates of NPK fertilizer on the growth and yield components of two exotic okra (Abelmoschus esculentus L.) western urban of Sierra Leone

2020 ◽  
Vol 26 ◽  
Author(s):  
P. M. Ngegba ◽  
S. M. Kanneh ◽  
D. D. Quee
Keyword(s):  
Sierra Leone ◽  
Yield Components ◽  
Seed Weight ◽  
Agricultural Research ◽  
Block Design ◽  
Climatic Conditions ◽  
Growth And Yield ◽  
Research Centre ◽  
Inland Valley ◽  
Dry Spell

The experiment was conducted in an Inland Valley Swamp during the dry spell of 2017 laid out in a randomized complete block design (RCBD) three replications at the Kabala Horticultural Crops Research Centre (KHCRC) cropping site, Ogoo Farm of the Sierra Leone Agricultural Research Institute (SLARI), Freetown, Sierra Leone. Raised beds measuring 5m x 1m (6 m2) with a 1m furrow between beds. Inter and intra row spacing of 75 cm by 50 cm with two rows per bed and two seeds per hills were directly sown. The treatments constituted NPK 15:15:15 at the rate of 0, 90, 120 and 150 kg/ha designated as T1, T2, T3 & T4  and Two hybrids of okra were used as experimental materials obtained from Indo-American Hybrid Seed Company, India; Okra-WASA-HyOKR-1 and Okra-WASA-HyOKR-2. Seeds were treated with Thiram Poison for longevity. Result indicates T2 (25.2; 35.1 cm) and T4 (56.9 cm) treatments recorded tallest plant heights followed by T2 (24.0, 34.4 & 50.1 cm), while T1 (18.8, 28.4 & 33.3 cm) had the shortest plant heights at 4, 8 & 10 Week After Planting respectively. Similarly, T4 & T2 (38.9, 65.5 & 44.8 cm) exhibited the largest SG and T1 (21.7, 33.0 & 52.0 cm) the least values at 4, 8 & 10 Week After Planting. While, the widest and narrowest LA at 4, 8 & 10 Week After Planting was observed in T3 (131.3, 135.0 & 158.5 cm2) and T1 (120.8, 121.8 & 128.1 cm2). With respect to yield and yield components, the longest (22.0 cm) and heaviest (112.7 g) fruit were recorded by T3 followed by T2 (19.1 cm & 101.3 g) with T1 having the shortest (11.7 cm) and lightest (52.3 g). The width of pod in T3 (31.2 cm) was greater than the rest of treatments and as usual, T1 indicated the least value (14.6 cm) respectively. The average NP produced plant-1 was shown by T2 & T3 (4.0) with the least of fruit produced by T1 (2.0). Also, 100 seed weight, T3 (106.7 g) weighted the highest followed by T2 (103.3 g), while T1 (60.3 g) accounted for the lowest seed weight. Conclusively, the two materials are adaptable to the climatic conditions of Sierra Leone (Western area). Hence further evaluation required across vegetable growing zones.

PROFITABILITY OF BARLEY AND PEAS MIXED INTERCROPPING IN THE SUBSISTENCE FARMING SYSTEMS OF THE NEPALESE HILLS

1998 ◽  
Vol 34 (4) ◽  
pp. 465-474 ◽  
Author(s):  
K. D. SUBEDI
Keyword(s):  
Grain Yield ◽  
Agricultural Research ◽  
Farming Systems ◽  
Farming System ◽  
Climatic Conditions ◽  
Research Centre ◽  
Pure Stand ◽  
Subsistence Farming ◽  
Traditional Practice ◽  
Land Equivalent Ratio

Experiments were conducted during the winter seasons of 1992–93 and 1993–94 at the Lumle Agricultural Research Centre and its off-station research site at Lopre in Nepal to study the agronomic performance and profitability of barley (Hordeum vulgare) and peas (Pisum sativum) mixed intercropping (that is, without any row arrangement) in the subsistence farming systems of the Nepalese hills. Sole crops of barley (cv. Bonus and Local) at 100kg seed ha−1 were compared with a pure stand of peas (cv. Tikot Local) sown at 60kg seed ha−1 and with peas intercropped with both varieties of barley at 100:40 or 100:20 kg seed ha−1. Results across two locations for two seasons showed that the barley+peas intercropping was advantageous in terms of overall grain yield, land equivalent ratio (LER), monetary advantage, economic return and dietary provision in the subsistence farming system. It also provided yield stability under adverse climatic conditions. Barley genotypes differed in their suitability for intercropping with peas. The yield of Local barley was reduced when peas were intercropped with it at both seed rates but this was not so with Bonus. The most appropriate combinations to realize the maximum advantage from intercropping were Bonus barley+peas at 100:20 kg seed ha−1 and Local barley+peas at 100:40 kg seeds ha−1. A combination of Bonus barley and peas at 100:20 kg seed ha−1 enabled farmers to harvest an additional 400 kg grains ha−1 from peas without significantly reducing the grain yield of barley. The study also verified through formal experimentation that the traditional practice of mixing barley and peas is advantageous.

scholarly journals MAG Welding of Structures Used in Means of Transport and Made of Steel DOCOL 1200M

2020 ◽  
pp. 65-71
Author(s):  
Bożena Szczucka-Lasota ◽  
Tomasz Węgrzyn ◽  
Bogusław Łazarz ◽  
Adam Jurek ◽  
Krzysztof Ireneusz Wilczyński
Keyword(s):  
Mechanical Properties ◽  
Tensile Strength ◽  
Research Work ◽  
Welding Parameters ◽  
Shielding Gases ◽  
High Tensile Strength ◽  
Moving Platform ◽  
Interpass Temperature ◽  
Made In

Steels of the DOCOL group, characterised by high tensile strength and yield point, play an important role in the manufacturing of means of transport. However, the above-named steels are difficult to weld and joints made in them do not guarantee comparable mechanical properties. The research work discussed in the article aimed to determine process parameters suitable for the welding of a moving platform made of steel DOCOL 1200M as well as to assess the effect of welding parameters on the quality of obtained joints. The tests also involved analysing the effect of shielding gases, preheating and interpass temperature on the quality of an 8 mm thick MAG welded moving platform structure.

Innovative Coating Technology for Textile Reinforcements of Concrete Applications

2011 ◽  
Vol 466 ◽  
pp. 167-173 ◽  
Author(s):  
Michael Glowania ◽  
Thomas Gries ◽  
Jens Schoene ◽  
Markus Schleser ◽  
Uwe Reisgen
Keyword(s):  
Tensile Strength ◽  
Glass Fibers ◽  
Research Work ◽  
High Tensile Strength ◽  
Textile Reinforced Concrete ◽  
Coating Technology ◽  
Wide Range ◽  
High Bond ◽  
Concrete Matrix ◽  
Short Glass

In the 60ties engineers started to combine short glass fibers with a concrete matrix. Today engineers combine endless fibers with the concrete matrix. Hence, the so called textile-reinforced concrete offers more and more opportunities to manufacture consumer goods like desks or chairs and to build face elements for houses and even load-bearing structures. This revolution is only feasible because a lot of research work has been done - into textile, into concrete, into the combination and the bonding. One big challenge still is to have a high bond between the fibers and the concrete to achieve high tensile strength. At the same time the reinforcement should be flexible to open a wide range of applications. The Institut für Textiltechnik and the Welding and Joining Institute of the RWTH Aachen University have spotted an innovative coating technology to achieve both – high tensile strength and drapability for textile-reinforcements for concrete applications.

scholarly journals Effect of Plasticizers on the Physicochemical properties of Bioplastic Extracted from Banana Peels

2021 ◽  
Vol 26 (2) ◽  
pp. 61-66
Author(s):  
Khagendra Chapain ◽  
Sambridhi Shah ◽  
Binod Shrestha ◽  
Rajendra Joshi ◽  
Naresh Raut ◽  
...  
Keyword(s):  
Tensile Strength ◽  
Physicochemical Properties ◽  
Water Uptake ◽  
Spectroscopic Analysis ◽  
Research Work ◽  
Load Test ◽  
High Tensile Strength ◽  
Test Soil ◽  
Water Absorption Test ◽  
Effective Result

Plasticizers are the binding substances used to increase the elasticity of materials. In this research work, bioplastic is extracted from banana peels using various plasticizers such as, glycerol, urea, distilled water and glucose. The prepared bioplastics were characterized by using Fourier-transform infrared spectroscopy (FTIR) spectroscopic analysis which showed that the peak at 3355 cm-1 indicate the H-bonding formation between N-H urea and starch. The physicochemical properties such as water absorption test, soil decomposition and load test of synthesized bioplastics were analyzed at ambient temperature. The water uptake analysis showed that bioplastic absorbs water for up to 4 days without being decay. The load test showed that urea plasticized bioplastic has a high tensile strength of 2.3 KPa. The result revealed that the bioplastic with glucose as a plasticizer showed the effective result in water uptake and soil decomposition test whereas the urea plasticized bioplastic showed relatively good tensile strength.

scholarly journals Study and Comparison of Different Methods of Nonsexual Propagation of F12/1 and Colt Rootstocks of Cherry

HortScience ◽  
1996 ◽  
Vol 31 (4) ◽  
pp. 634f-635
Author(s):  
A. Talaie ◽  
Sh. Khan Gholi
Keyword(s):  
Agricultural Research ◽  
Callus Formation ◽  
Lateral Roots ◽  
Block Design ◽  
Research Work ◽  
Climatic Conditions ◽  
Research Station ◽  
High Concentration ◽  
Rooted Cuttings ◽  
Randomized Block Design

This research work was carried out for 2 years at Kelardasht-Mazandaran and Mardabad-Karaj Agricultural Research Stations to evaluate the rooting of selected and hybrid F12/l and Colt rootstocks under climatic conditions of Iran. Young F12/l and colt rootstocks (semi-hard wood and summer cuttings) available in Kelardasht Agricultural Research Station were used These rootstocks were also used for layering. Summer cuttings were taken in early July and, after wounding, were treated with IBA with 1000, 2000, and 3000 ppm and then put under mist. Three months later the rooted cuttings were evaluated on the basis of rooting percentage, number and the length of the main and the lateral roots and the length of the rooted section. The hardwood cuttings were prepared in two intervals (early Dec. and late March) and, when wounded, were treated with IBA with the same concentrations. Finally, the experiments were completed by horizontal layering of several rootstocks and covering them with soil. The results were used in a completely randomized block design in four treatments, and the averages were compared by Duncan test. The results indicate that the summer cuttings treated with 1000 ppm IBA have the highest rooting percentage in both rootstocks, while those treated with 2000 ppm gave the best results with regard to number and the length of the main root. The best result on the number and the length of the lateral roots are achieved in cuttings treated with 2000 ppm IBA. Number and the length of lateral roots in Colt and F12/l rootstocks are, respectively, high in cuttings treated with 2000 and 3000 ppm. IBA. In semi-hardwood cuttings, different concentrations of IBA were effective on callus formation and budbreak. Thus, there were more callus formation in high concentration and the number of budbreaks was reduced. Study on the layering method indicates that there are 6.1 and 3 rooted cuttings in every Colt and F12/l layered rootstocks respectively. The rooting percentage in the said rootstocks is 100% and 73.3%, respectively.

PEMANFAATAN LIMBAH KULIT DURIAN (Durio zibethinus) DAN KULIT CEMPEDAK (Artocarpus integer) SEBAGAI EDIBLE FILM

2014 ◽  
Vol 6 (1) ◽  
pp. 27 ◽  
Author(s):  
Desi Mustika Amaliyah
Keyword(s):  
Tensile Strength ◽  
Food Packaging ◽  
Raw Materials ◽  
Edible Films ◽  
Edible Film ◽  
Durio Zibethinus ◽  
Yield Result ◽  
Pre Treatment

Durian (Durio zibethinus) and cempedak (Artocarpus integer) peels waste are not used by the society. The research aim is to extract pectin from durian and cempedak peels and to formulate the pectin into edible films for food packaging. The research stages were first pre-treatment of durian and cempedak peels, pectin extraction, pectin drying, and  pectin application as edible films with concentration of 0%, 5%, and 15%. Based on this research it was concluded that pectin can be extracted from durian and cempedak peels with yield result of 27.97 % and 55.58 %, respectively. Edible film obtained has  similar characteristics between raw materials cempedak and durian peels. The higher concentration of cempedak peel  pectin increased the thickness, but decreased the tensile strength and elongation at a concentration of 15%. While in edible films from durian peel pectin, the higher concentration of pectin decreased the thickness of edible film on pectin concentration of 15%, lowered tensile strength and raised the edible film elongation.Keywords: waste, durian, cempedak, pectin extraction, edible film

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