EFFECT OF SEED SOURCE ON COMPARATIVE TEST RESULTS IN BARLEY

1963 ◽  
Vol 43 (3) ◽  
pp. 295-300 ◽  
Author(s):  
A. D. McFadden

A common seed stock for each of four varieties of barley was increased at five locations in 1959 and again in 1960. In 1960 and in 1961, the five seed lots of each variety were tested at several locations. There were significant differences in yield between crops of the same variety produced from different seed lots. In 1960, differences ranged from 9 to 16 per cent, and in 1961 from 3 to 13 per cent. They were such that differences between varieties could be changed materially and yield rankings could even be altered by using seed lots propagated at different locations. There was some suggestion that chemical content of seed from different sources was associated with crop performance at other locations although this was not established.This study serves to emphasize the extreme importance of seed source and the necessity for controlling this or any other non-genetic source of variability in comparative tests.

2018 ◽  
Vol 2018 ◽  
pp. 1-17 ◽  
Author(s):  
Reyes Yam-Uicab ◽  
José López-Martínez ◽  
Erika Llanes-Castro ◽  
Lizzie Narvaez-Díaz ◽  
Joel Trejo-Sánchez

Detecting and counting elliptical objects are an interesting problem in digital image processing. There are real-world applications of this problem in various disciplines. Solving this problem is harder when there is occlusion among the elliptical objects, since in general these objects are considered as part of the bigger object (conglomerate). The solution to this problem focusses on the detection and segmentation of the precise number of occluded elliptical objects, while omitting all noninteresting objects. There are a variety of computational approximations that focus on this problem; however, such approximations are not accurate when there is occlusion. This paper presents an algorithm designed to solve this problem, specifically, to detect, segment, and count elliptical objects of a specific size when these are in occlusion with other objects within the conglomerate. Our algorithm deals with a time-consuming combinatorial process. To optimize the execution time of our algorithm, we implemented a parallel GPU version with CUDA-C, which experimentally improved the detection of occluded objects, as well as lowering processing times compared to the sequential version of the method. Comparative test results with another method featured in literature showed improved detection of objects in occlusion when using the proposed parallel method.


HortScience ◽  
1995 ◽  
Vol 30 (4) ◽  
pp. 777F-778
Author(s):  
Teresa A. Cerny ◽  
Terri W. Starman

Seed of five species of petunia and 10 cultivars of Petunia xhybrida were obtained from several sources and plants were fingerprinted using DNA amplification fingerprinting (DAF). Within some species, variable fingerprints were generated between individual plants from the same seed source and/or different sources. Consistencies were found among DAF profiles by bulking the leaf tissue from 10 different plants, but not five plants. Each of 10 octamer primers used during the study revealed polymorphic loci between the species and cultivars. Among the 201 bands produced, 146 (73%) loci were polymorphic and these could be used to distinguish between each of the species and cultivars. Scoring for presence and absence of the amplified bands was used to generate a phylogenetic tree and to calculate the pairwise distances between each of the taxa using parsimony (PAUP) analysis. The tree generated using DAF molecular markers separated P. axillaris from P. parodii (two white-flowered species), and distinguished between the violet-flowered species, P, inflata, P. integrifolia, and P. violacea.


2020 ◽  
pp. 110
Author(s):  
Made Krisna Adi Jaya

Background: Drugs crushed using mortar is indeed already assessed according the procedure and maintained stability of the cure. But this process requires a relatively long that made some pharmacies preparing medications using a tablet crusher machine. There is a possibility of crushed using a tablet crusher will reduce the stability of certain types of drugs if direct contact with the metal blender machine. Purpose: the variable examined was the stability of the region, namely drug comparison of levels of a drug that dipreparasi uses a tablet crusher and mortar in the primary health care facility pharmacies. Methods: UV-VIS spectrophotometry. Results: the maximum wavelength of klorfeniramine maleate acquired was 261.5 nm and paracetamol is 247.7 nm. % recovery of klorfeniramine maleate raw is ± 2.8% whereas 99.82 on paracetamol is 2.09% ± 100.17. The result of the calculation precision value was obtained by tests at on klorfeniramine maleate is 0.76% whereas on paracetamol is 1.13%. LOD and LOQ of klorfeniramine maleate is 3.20 ± 0.05 and 0.15 ± 9.7 while the LOD and LOQ of paracetamol is 0.38 ± 0.22 and 1.16 ± 0.56. Preparation of comparative test results time crushed with a levels has been made aware that the value of significance test of the Mann Whitney absence of difference levels of drugs that are dipreparasi using mortars and tablet crusher. Conclusion: Drug Crushed with tablet crusher and with mortar does not have the difference statistically. Keyword: blender, crusher, mortars, stability


2020 ◽  
Vol 52 (2) ◽  
pp. 05-07
Author(s):  
Novel Pokrovskii

Water is one of the essential necessities and vital for supporting the personal satisfaction. Attributable to expanding pattern in global advancement, the nature of water is persistently flagging. Water contamination has been an expanding issue in the course of the most recent couple of years. Lakes and streams would those key wellsprings about drinking water, which stunningly depend on upon water individual fulfilment. For this reason, we recommend an IoT based water quality framework fit for estimating the nature of water. The proposed arrangement depends on WHO characterized water quality measurements. An installed model is created to proof the water superiority boundaries from the water tests gathered from different sources over the investigation zone. The goal of this water quality checking framework utilizing web of things is to locate the nature of the water for example how the pH content changes and sending message to the comparing specialists. Further we broaden this venture by sending the sensor information to cloud for worldwide checking of water quality. The handled information can be distantly observed and water stream can be controlled utilizing our created programming arrangement containing versatile application and a dashboard. Notwithstanding water superiority checking and manage framework, the prescient investigation of the gathered information is performed. AI calculations are applied for arrangement of water superiority and the test results demonstrate that profound neural system beats every other calculation.


1987 ◽  
Vol 16 (2) ◽  
pp. 67-76 ◽  
Author(s):  
H Reul ◽  
M Giersiepen ◽  
E Knott

A whole range of laboratory testing methods for prosthetic heart valves, such as steady flow testing, pulsatile flow testing, and fatigue testing, are presented. Comparative test results for various valve types are given and relative valve performance is discussed.


2013 ◽  
Vol 361-363 ◽  
pp. 1455-1459
Author(s):  
Guang Wu Yang ◽  
Hua Peng ◽  
Jiani Wang ◽  
Xiao Pei Cai

To solve the abnormal rail corrugation problem of Beijing Metro Line 4, the track structural parameters comparative tests were carry out in the Metro Line 1,2 and 4. Metro Lines 1 and 2 were chosen based of the Beijing Subway Survey and previous successful experiments. The comparative analysis was based off of rail static geometry, dynamic displacement and the lateral acceleration. The test results proved the stiffness of line4 is weaker than line1,2 and suggestions on steps to prevent and correct the metro rails abnormal corrugation will be formulated.


2012 ◽  
Vol 488-489 ◽  
pp. 236-240
Author(s):  
Xiao Ping Chen ◽  
Ru Fu Hu

In this paper, the fatigue comparative test includes two groups of crankshafts, one group with surface rolling process and the other not, has been finished. And the test results are analyzed. The parent standard deviation test shows that there is not effect of surface rolling process impact on the uniformity of crankshaft fatigue strength. But it is sure that there is the impact of surface rolling process impact on the average of crankshaft fatigue strength by the average maternal test. So the surface rolling process can be used to improve crankshaft fatigue strength.


1971 ◽  
Vol 6 (3) ◽  
pp. 147-166 ◽  
Author(s):  
G E Findlay ◽  
D G Moffat ◽  
P Stanley

Following elastic tests, which have been described in detail elsewhere, further work has been carried out in the plastic range on four full-size mild-steel torispherical drumheads subjected to internal pressure. The work is presented here in two parts. Part 1 contains a review of some previous theoretical numerical and experimental work related to the present study, an account of the test installation and procedure, and a presentation of the complete test results. Data on the initiation and propagation of yield are also included. In Part 2 the variations in maximum head strain and head height with increasing pressure are compared with computer predictions from an existing C.E.G.B. programme; there are some inconsistencies between the numerical and experimental data and the relevant factors are considered in detail. The observed limit pressures and maximum shakedown pressures are compared with independent alternative values from several different sources and the implications of the experimental results in relation to design are discussed.


2021 ◽  
Vol 2021 ◽  
pp. 1-6
Author(s):  
Diana Susyari Mardijanti ◽  
Erri Noviar Megantara ◽  
Ayi Bahtiar ◽  
Sunardi Sunardi

Cocopith is the main waste of the coconut coir milling industry, which has not been handled properly until now. Burning cocopith as a response to land availability concerns for storing waste has an impact on pollution for the surrounding environment. Efforts to reduce, reuse, recycle, and remanufacture cocopith waste provide better economic value for waste. The method used in this research is one with quantitative and qualitative approaches. The AAS method is used to test the concentration of cocopith chemical elements, while lignin and cellulose levels were tested using data methods. The test results obtained that the highest chemical elements are sulfur and chlorine; the sulfur content in 1 kg of cocopith is 24,000 mg and chlorine content is 10,371 mg. Meanwhile, the other results showed that lignin levels in cocopith (22.7%) are higher than cellulose content (10.27%). The test results of cocopith characteristics from the methods mentioned above showed that the chemical content of sulfur and chlorine and lignin, more so than cellulose, causes cocopith to have the potential to insulate thermally. Based on this potential, cocopith is processed into mycelium-based biocomposite that serves as an insulator. Maximum stress and tensile stress of this biocomposite have been tested through flexural strength tests with the ASTM-D7264 method. The biocomposite feasibility of the material as an insulator was shown through a thermal conductivity test at temperatures of 13°C–40°C. This showed a thermal conductivity value of 0.0887241  ±  0.002964 W/mK. This value is in the range of 0.01–1.00 W/mK, which is a recommended value for the thermal conductivity insulator.


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