Experimental Research on Cracking Resistance of Alfalfa Seed

The compression properties of three varieties of alfalfa seeds, such as Medicago sativa L. cv. Gannong No.3, Medicago sativa L. Longdong and Medicago sativa L. cv. Golden Empress, are studied by extrusion experiments using SANS universal material testing machine. The results of Longdong alfalfa seed show that the fracture load has relation with shape and size of the alfalfa seeds. For both of ellipsoidal seed and arched seed, the fracture load of single seed is about 19N to 30N. The fracture load increases linearly with the thickness of plump seed with the ratio of thickness to width greater than 0.75. These inclusions for other two varieties are the same with Longdong alfalfa seed. This research could offer a technical basis of designing and developing of the alfalfa seeder and seed harvesting machine.

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Structure conformational and rheological characterisation of alfalfa seed (Medicago sativa L.) galactomannan

Carbohydrate Polymers ◽

10.1016/j.carbpol.2020.117394 ◽

2020 ◽

pp. 117394

Author(s):

Thierry Hellebois ◽

Christos Soukoulis ◽

Xuan Xu ◽

Jean-Francois Hausman ◽

Alexander Shaplov ◽

...

Keyword(s):

Medicago Sativa ◽

Alfalfa Seed ◽

Medicago Sativa L

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Effects of Zr, Y on the Microstructure and Properties of As-Cast Cu-0.5Y-xZr (wt.%) Alloys

Metals ◽

10.3390/met9101084 ◽

2019 ◽

Vol 9 (10) ◽

pp. 1084

Author(s):

Dong Liang ◽

Ning Wang ◽

Yuxiang Wang ◽

Zhenjie Liu ◽

Ying Fu

Keyword(s):

Electron Microscopy ◽

Mechanical Properties ◽

Tensile Strength ◽

Copper Alloys ◽

Testing Machine ◽

Elongation Rate ◽

Nominal Composition ◽

Microstructure And Properties ◽

Universal Material Testing Machine ◽

Material Testing Machine

In this paper, the microstructure and properties of as-cast Cu-Y-Zr alloys with different Zr content were studied in order to investigate whether the precipitates in copper alloys would interact with each other by adding Y and Zr simultaneously. As-cast Cu-0.5Y-xZr (wt.%, x = 0.05 and 0.1, nominal composition) alloys were prepared by vacuum melting in this study. Scanning electron microscopy (SEM), energy dispersive spectroscopy (EDS), X-ray diffraction (XRD), and transmission electron microscopy (TEM) were used to observe the microstructure of the alloys. The mechanical properties of the alloys were tested by universal material testing machine at room temperature. The effects of Zr content on the microstructure and mechanical properties of the alloys were explored. As shown by the research results, in the as-cast Cu-0.5Y-xZr (wt.%) alloys, the precipitated phase was the Cu5Y/Cu5Zr phase and ranged from 10 nm to 70 nm in size; when the Zr content increased from 0.05 wt.% to 0.1 wt.%, both the tensile strength and elongation rate of the alloys increased; when the Zr content was 0.1 wt.%, the tensile strength was 225 MPa and the elongation rate was 22.5%.

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Morphology, Mechanical and Thermal Properties of the Blends of Poly(Trimethylene Terephthalate)/Acrylonitrile-Styrene-Acrylic Copolymer

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.665.348 ◽

2014 ◽

Vol 665 ◽

pp. 348-351

Author(s):

Shu Fang Lv ◽

Shi Jie Niu ◽

Ying Bin Liu ◽

Ming Tao Run

Keyword(s):

Thermal Aging ◽

Testing Machine ◽

Color Difference ◽

Good Effect ◽

Mechanical And Thermal Properties ◽

Acrylic Copolymer ◽

Copolymer Blends ◽

Trimethylene Terephthalate ◽

Universal Material Testing Machine ◽

Material Testing Machine

Poly (trimethylene terephthalate)/acrylonitrile-styrene-acrylic copolymer blends were prepared and their morphology, thermal aging and mechanical properties were investigated by using the polarized optical microscopy, universal material testing machine and color-difference meter, repectively. The results suggest that ASA and PTT are partially miscible in the blends, and when TPEE content is 50%, a bi-continuous phases form in the blend. The PTT’s spherulites in the blends become smaller and even microcrystallites with increasing ASA content. ASA component has good effect on toughen PTT by increasing blends’ impact strength but depresses the tensile strength of the blends. ASA has no influence on the thermal aging properties of PTT, and PTT/ASA blend has better thermal aging resistance than that of PTT/ABS blend.

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The Compatibility Research of the Organic Montmorillonites with SEBS

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.1044-1045.128 ◽

2014 ◽

Vol 1044-1045 ◽

pp. 128-132

Author(s):

Chen Jie Shi ◽

Xiao Yan Li ◽

Xia Wang ◽

Yuan Wen Wang ◽

Zhen Lu ◽

...

Keyword(s):

Testing Machine ◽

Melt Blending ◽

X Ray Diffraction ◽

Exchange Method ◽

Organic Modification ◽

Layer Spacing ◽

Ft Ir ◽

Universal Material Testing Machine ◽

Material Testing Machine

To improve the compatibility of montmorillonite (MMT) with polymer. A kind of organic intercalation agent was applied in the intercalating organic modification of montmorillonite (OMMT) through ion exchange method, and a kind of silane coupling agent was further used to do the organic treatment. The SEBS/OMMTs composites were also prepared by melt blending. Structure and characterization of the modified MMTs were investigated by Fourier Transform infrared (FT-IR), wide angle X-ray diffraction (WAXRD), and the thermal stability were characterized by Thermogravimetric analysis (TGA). The dispersion status of MMTs were evaluated by scanning electron microscope (SEM) and the composites were tested by universal material testing machine. The FTIR results initial displayed that OMMTs had the absorption peak of organic functional groups. The XRD results showed that compared to Na+-MMT(1.47 nm), the layer spacing of H-OMMT increased to 3.27 nm, the above two results showed the organic modification of MMT had succeed. The results of TGA showed that OMMTs had a weight loss of organics. The SEM demonstrated that H-OMMT had the best dispersion status in SEBS matrix, and Na+-MMT was the worst.

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Development and Properties of a New Correction Instrument of Pectus Excavatum

Materials Science Forum ◽

10.4028/www.scientific.net/msf.610-613.1327 ◽

2009 ◽

Vol 610-613 ◽

pp. 1327-1330

Author(s):

Yu Ling Hu ◽

Xue Bao Yu ◽

Wei Dong Miao ◽

Gang Liu

Keyword(s):

Mechanical Properties ◽

Minimally Invasive ◽

Pectus Excavatum ◽

Testing Machine ◽

Pure Titanium ◽

Material Testing ◽

Invasive Technique ◽

Nuss Procedure ◽

Universal Material Testing Machine ◽

Material Testing Machine

A new correction instrument of pectus excavatum is introduced which is designed for a minimally invasive technique (Nuss procedure). The instrument was made of pure titanium plates, and finished by machining, surface treatment and so on. The instrument was made up of correcting bar and fixing bar. The mechanical properties of the instrument was measured with electron universal material testing machine, the safety and validity was verified by clinical doctors after being implanted into the patient. Results showed that the mechanical properties of the instrument keep constantly after implantation for two years. It is lighter than the like product, and can lighten the patent’s and the doctor’s operation bearing. It had been applied in national hospitals, and results showed that it was of better biocompatibility, and few complications were found. Clinical treatment effects were satisfactory.

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INHIBITING INFECTION OF ALFALFA SEEDLINGS BY PRATYLENCHUS PENETRANS BY TREATING SEED WITH OXAMYL

Canadian Journal of Plant Science ◽

10.4141/cjps79-083 ◽

1979 ◽

Vol 59 (2) ◽

pp. 519-520 ◽

Cited By ~ 1

Author(s):

J. L. TOWNSHEND ◽

J. W. POTTER

Keyword(s):

Medicago Sativa ◽

Pratylenchus Penetrans ◽

Alfalfa Seed ◽

Medicago Sativa L

Seedling alfalfa roots (Medicago sativa L. ’Saranac’) were protected from infection by Pratylenchus penetrans (Cobb) when alfalfa seed was treated with aqueous oxamyl at concentrations exceeding 2000 ppm. No infection occurred after oxamyl treatment at 32 000 ppm. Neither germination nor nodulation of alfalfa was adversely affected by treatment with oxamyl.

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EFFECTS OF ESTABLISHMENT METHOD AND A RAPESEED COMPANION CROP ON ALFALFA SEED YIELD

Canadian Journal of Plant Science ◽

10.4141/cjps87-037 ◽

1987 ◽

Vol 67 (1) ◽

pp. 263-266 ◽

Cited By ~ 1

Author(s):

J. WADDINGTON ◽

N. MALIK

Keyword(s):

Medicago Sativa ◽

Seed Production ◽

Seed Yield ◽

Brassica Campestris ◽

Establishment Method ◽

Alfalfa Seed ◽

Medicago Sativa L ◽

Companion Crop

In two experiments at Melfort using alfalfa (Medicago sativa L. ’Beaver’) seeded at a rate of 2 kg ha−1 with and without a Polish rapeseed (Brassica campestris L. ’Candle’) companion crop seeded at 5.5 kg ha−1, rapeseed yields in the establishment year were maximum when alfalfa and rapeseed were mixed and planted in 15-cm rows. Alfalfa showed no consistent seed yield differences between broadcast seeding, seeding in 15- or 61-cm rows, or seeding with or without the companion crop.Key words: Alfalfa, rapeseed, Brassica campestris, seed production

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Evaluation of Rhizobium inoculant formulations for alfalfa yield and N fixation

Canadian Journal of Plant Science ◽

10.4141/p05-143 ◽

2007 ◽

Vol 87 (2) ◽

pp. 267-272 ◽

Cited By ~ 2

Author(s):

J. Diane Knight

Keyword(s):

High Risk ◽

Medicago Sativa ◽

Sinorhizobium Meliloti ◽

The Other ◽

N Fixation ◽

Biological N Fixation ◽

Small Seed ◽

Alfalfa Seed ◽

Medicago Sativa L

Because of its small seed size, alfalfa (Medicago sativa L.) typically is seeded at a shallow depth, putting Rhizobium inoculated onto the seed coat at a high risk of desiccation. Granular inoculants may provide a superior delivery formulation for Rhizobium because the inoculant can be placed deeper in the soil than the seed, where it is protected from desiccation. Sinorhizobium meliloti cv. Beaver delivered as (1) pre-inoculated alfalfa seed from the inoculant manufacturer, (2) commercial peat-based, self-sticking inoculant applied on-site, and (3) granular inoculant placed with the seed or (4) banded below and to the side of the seed was evaluated against uninoculated alfalfa controls at three field sites in Saskatchewan. Overall, alfalfa inoculated with the granular formulation placed below and to the side of the alfalfa seed was among the highest biomass producer in the establishment year, although it did not exhibit superior nodulation or biological N fixation compared with the other treatments. Any advantage conferred by the granular inoculant in the establishment year did not persist through the first and second production years. Under the conditions of this study, the delivery formulation had no long-term affect on alfalfa productivity, nodulation and biological N fixation. Furthermore, none of the inoculant treatments were consistently superior to the uninoculated controls. Key words: Alfalfa, granular inoculant, peat inoculant, pre-inoculated seed, Medicago sativa L., Sinorhizobium meliloti

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Crystal Morphology and Thermal Properties of PTT/POE/OMMT Nanocomposites

Solid State Phenomena ◽

10.4028/www.scientific.net/ssp.181-182.39 ◽

2011 ◽

Vol 181-182 ◽

pp. 39-42

Author(s):

Ming Tao Run ◽

Qing Chang Zhang ◽

Wen Zhou ◽

Yu Zhong

Keyword(s):

Crystal Morphology ◽

Testing Machine ◽

Crystallization Rate ◽

Material Testing ◽

Melt Crystallization ◽

Nucleation Agent ◽

Scanning Calorimetry ◽

Lower Melting Point ◽

Universal Material Testing Machine ◽

Material Testing Machine

The crystal morphology, melt-crystallization and mechanical properties of poly (trimethylene terephthalate)/maleinized poly (octene-ethylene)/organo-montmorillonite nanocomposites were investigated by using polarized optical microscopy (POM), differential scanning calorimetry (DSC) and universal material testing machine, respectively. The results suggest that the nanocomposites form smaller or imperfect microcrystallites with lower melting point due to the influence of OMMT components and the nanocomposites have increased crystallization rate because OMMT is an effective nucleation agent. However, the crystallinity decreases because of the thickening effect of OMMT in the composites. The nanocomposite with 2%OMMT has the largest tensile and impact strength.

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