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Letteratura scientifica selezionata sul tema "First-Layer varieties"

Autore: Grafiati

Pubblicato: 25 gennaio 2025

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Articoli di riviste sul tema "First-Layer varieties"

Pratama, Yandro Yandro, Widodo Haryoko e M. Zulman Harja Utama. "Upland Rice Tolerance Test Based on Pissy Seeds on Ultisols Used for Cultivation of Bulbs and New Openings". Baselang 2, n. 1 (30 aprile 2022): 24–29. http://dx.doi.org/10.36355/bsl.v2i1.32.

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Upland rice tolerance test trials based on pithy seeds on ultisols used for tuber cultivation and new openings were carried out from November 2019 – February 2021 in Nagari Kampung Pinang, Lubuk Basung sub-district with the aim of knowing the interaction of upland rice varieties on ultisols of former tubers and new openings of ultisols. This experiment was conducted in a factorial Randomized Block Design with two factors. The first factor was the upland rice varieties Rindang I, Luhur I and Barabah, and the second factor was the ultisol treated layer, namely cassava ultisol, onion ultisol treatment layer and new layer processing. Based on the experiment, it was concluded that the three upland rice varieties tested, namely Rindang I, Luhur I and Barabah were classified as tolerant varieties with the order of tolerance being the Rindang I variety, followed by the Luhur I variety and the Barabah variety. Keywords: rice, ultisol, cassava, shallot

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Packa, Danuta, Marian Wiwart, Elżbieta Suchowilska e Teresa Bieńkowska. "Morpho-anatomical traits of two lowest internodes related to lodging resistance in selected genotypes of Triticum". International Agrophysics 29, n. 4 (1 ottobre 2015): 475–83. http://dx.doi.org/10.1515/intag-2015-0053.

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Abstract The cross-sections of first and second internodes were analyzed under a light and fluorescence microscopes in six varieties of Triticum spelta, two varieties of T. polonicum, and one variety of T. aestivum. The morphometric parameters of stem cross-sections were measured. The analyzed wheats were characterized by significant differences in traits associated with lodging resistance ie: internode diameter, lumen diameter, stem wall thickness, mechanical layer thickness, area of transverse section, and area of lumen for the first and second internode and between the internodes. In all varieties, the values of internode diameter, lumen diameter, area of transverse section and area of lumen were higher for the second internode than for the first internode, whereas the reverse was reported for stem wall thickness and mechanical layer thickness The results of the principal component analysis and section modulus values revealed similarities between spring spelt Wirtas and Rubinas and between common wheat Kontesa and winter spelt Poeme and Epanis. The number of large vascular bundles varied across the studied varieties. The average number of vascular bundles in common wheat Kontesa was significantly higher than in spring spelt Rubinas and Wirtas and significantly lower than in Polish wheat Pol-3 and winter spelt Epanis and Poeme.

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Ryashnetsev, Dmitry S., e Eugeny A. Belenkov. "New polymorphic varieties of boron nitride with graphene-like structures". Radioelectronics. Nanosystems. Information Technologies. 13, n. 3 (27 settembre 2021): 349–54. http://dx.doi.org/10.17725/rensit.2021.13.349.

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First-principle calculations of the structure and electronic properties of four new polymorphic varieties of graphene-like boron nitride, the structure of which is similar to the structure of graphene polymorphs, the atoms in which are in the spirit of different structural positions, were performed by the density functional theory method in the generalized gradient approximation. As a result of the studies carried out, the possibility of stable existence of three monoatomic boron nitride layers: BN-L4-6-8a, BN-L4-6-8b and BN-L4-10 has been established. The BN-L4-12 layer is transformed into the BN-L4-6-8 layer during geometric optimization. The lengths of interatomic bonds in boron nitride monolayers vary in the range 1.4353 Å ÷ 1.4864 Å, and the bond angles in the range 84.05° ÷ 152.26°. The band gap of the BN layers varies from 3.16 eV to 3.90 eV. Sublimation energies are in the range from 16.67 eV/(BN) to 17.61 eV/(BN).

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Golubova, Valentina, e Pavel Kostylev. "Assessment of morphophysiological features of rice samples in flooding conditions". E3S Web of Conferences 381 (2023): 01076. http://dx.doi.org/10.1051/e3sconf/202338101076.

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The article presents the results of a morphophysiological assessment of rice samples by the strength of growth, as well as an assessment of the degree of development of the conducting system of the flag leaves of rice plants. The resistance of varieties to flooding is very relevant in the fight against weeds due to the deep layer of water that weeds cannot overcome. Currently, there are no zoned varieties in Russia that would meet these requirements. Therefore, the problem of creating such rice varieties is urgent, as it will reduce production costs, reduce grain losses during harvesting, improve the quality of the products obtained, and also reduce the pesticide load on the ecosystem. As a result of research, a number of studied samples revealed the potential to quickly lengthen the first leaves, overcome a large layer of water and accumulate vegetative mass. As a result of the evaluation of the conducting system of the flag leaf of rice plants, it was found that in plants with the flood resistance gene Sub1A, which stops growth under water, the conductive beams were smaller in comparison with other fast-growing samples with the AG, Sk genes. Consequently, fast-growing samples have bigger sizes of the conducting system as a resistance mechanism.

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Strakhovenko, V. D., N. A. Belkina, N. A. Efremenko, M. S. Potakhin, D. A. Subetto, L. A. Frolova, G. R. Nigamatzyanova, A. V. Ludikova e E. A. Ovdina. "The First Data on the Mineralogy and Geochemistry of the Suspension of Lake Onego". Russian Geology and Geophysics 63, n. 1 (1 gennaio 2022): 55–71. http://dx.doi.org/10.2113/rgg20204280.

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Abstract —This paper presents the first data on the mineralogy, geochemistry, and quantitative distribution of suspension determined with the use of sedimentation traps installed in Lake Onego (the exposure time was one year (2019)). The obtained data on the mineralogic and geochemical composition of the recent suspension of the Onego water column are compared with the data for the surface layer of the lake bottom sediments (0–10 cm). Data on the sedimentation rates for the substance determined with the sedimentation traps have been obtained for the first time for Lake Onego. The estimates of the sedimentation rates differ slightly from the results of calculation of the sedimentation rates by radioisotope dating based on the distribution of 210Pb activity in the upper layer of bottom sediments in combination with the data on 137Cs. It has been established that the mineral part of the dispersed sedimentary matter that entered the lake reaches the bottom sediment without significant changes. The geochemistry of the sedimentation traps is similar in many respects to the geochemistry of the upper part of the bottom sediments (0–10 cm) in different areas of Lake Onego. The dispersed sedimentary material and the bottom sediment differ in the amount of the biogenic part (in the bottom sediment layer (0–10 cm), the biogenic part loses a significant part of organic matter). The bottom sediments are characterized by a strong predominance of the ferruginous varieties of illite and chlorite, in contrast to the suspension with the prevailing Mg–Fe varieties of these minerals. Degraded mica minerals brought by rivers are regenerated to normal ferruginous illites and chlorites directly in the uppermost part of the bottom sediments. The bottom sediments are characterized by higher manganese and molybdenum contents, and the material from the sedimentation traps, by high mercury contents.

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Fan, Shuang, Chaoqi Qin, Zhuopin Xu, Qi Wang, Yang Yang, Xiaoyu Ni, Weimin Cheng et al. "A Rapid and Accurate Quantitative Analysis of Cellulose in the Rice Bran Layer Based on Near-Infrared Spectroscopy". Foods 12, n. 16 (9 agosto 2023): 2997. http://dx.doi.org/10.3390/foods12162997.

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Cultivating rice varieties with lower cellulose content in the bran layer has the potential to enhance both the nutritional value and texture of brown rice. This study aims to establish a rapid and accurate method to quantify cellulose content in the bran layer utilizing near-infrared spectroscopy (NIRS), thereby providing a technical foundation for the selection, screening, and breeding of rice germplasm cultivars characterized by a low cellulose content in the bran layer. To ensure the accuracy of the NIR spectroscopic analysis, the potassium dichromate oxidation (PDO) method was improved and then used as a reference method. Using 141 samples of rice bran layer (rice bran without germ), near-infrared diffuse reflectance (NIRdr) spectra, near-infrared diffuse transmittance (NIRdt) spectra, and fusion spectra of NIRdr and NIRdt were used to establish cellulose quantitative analysis models, followed by a comparative evaluation of these models’ predictive performance. Results indicate that the optimized PDO method demonstrates superior precision compared to the original PDO method. Upon examining the established models, their predictive capabilities were ranked in the following order: the fusion model outperforms the NIRdt model, which in turn surpasses the NIRdr model. Of all the fusion models developed, the model exhibiting the highest predictive accuracy utilized fusion spectra (NIRdr-NIRdt (1st der)) derived from preprocessed (first derivative) diffuse reflectance and transmittance spectra. This model achieved an external predictive R2p of 0.903 and an RMSEP of 0.213%. Using this specific model, the rice mutant O2 was successfully identified, which displayed a cellulose content in the bran layer of 3.28%, representing a 0.86% decrease compared to the wild type (W7). The utilization of NIRS enables quantitative analysis of the cellulose content within the rice bran layer, thereby providing essential technical support for the selection of rice varieties characterized by lower cellulose content in the bran layer.

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Magomedova, A. N., A. A. Magomedova e Z. M. Musaeva. "IMPROVEMENT OF THE TECHNOLOGY OF CULTIVATION OF WINTER WHEAT VARIETIES IN THE FOOTHILLN PROVINCE OF THE REPUBLIC OF DAGESTAN". THEORETICAL & APPLIED PROBLEMS OF AGRO-INDUSTRY 56, n. 2 (2023): 7–10. http://dx.doi.org/10.32935/2221-7312-2023-56-2-7-10.

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Winter wheat is the main grain crop for Dagestan. In the irrigated conditions of the republic, the elements of the cultivation technology of this crop have been studied in detail. But, however, the issues of studying the adaptive potential of new promising varieties of winter wheat and improving the technology of their cultivation in the conditions of Piedmont Dagestan have not been practically studied. Our research was aimed at solving this problem in terms of selecting more productive varieties of winter wheat, developing a tillage system that meets the requirements of this crop, and using growth preparations, which have not been previously studied in the area under consideration. In the first experiment, it was revealed that the highest productivity of the wheat variety was formed on the variant with plowing with additional loosening of the subsurface layer up to 0.4 m with SibIME rippers. The average yield of varieties in this case was 4.67 t/ha, the excess with the data of the first (plowing) and second (loosening) options was 6.6 and 25.2%. Under the conditions under consideration, the maximum grain yields were recorded in the Grom variety - an average of 4.38 t/ha. In the second experiment, it was found that, against the background of the applied growth regulators, the yield of varieties was significant, while the maximum average value for varieties was noted on plots with the Novosil regulator - 5.36 t/ha, the excess compared to the control was 25.2%, and compared with the variants with regulators Alfasim and Biosil - 4.5 and 14.5%, respectively. As in the first experiment, in this case, in the conditions of Piedmont Dagestan, the Grom variety provided the highest productivity - an average of 5.07 t/ha in the experiment, which is 8.8% higher than the data of the Tanya variety.

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Lapshin, Yu A., V. A. Maksimov e R. I. Zolotareva. "The influence of agroclimatic conditions and mineral fertilizers on the grain productivity of spring triticale in the conditions of Mari El Republic". Agricultural Science Euro-North-East 23, n. 3 (23 giugno 2022): 307–17. http://dx.doi.org/10.30766/2072-9081.2022.23.3.307-317.

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The article presents data of 2019-2021 on the influence of agroclimatic conditions and doses of mineral fertilizers on the grain productivity of 13 varieties of spring triticale. A close dependence of the yield of triticale varieties on the reserves of productive moisture in the soil layer of 0-50 cm was established for the periods May-June (r = 0.73) and July-August (r = 0.85). Without the use of mineral fertilizers in arid conditions with reserves of productive moisture in 0-50 cm soil layer from 61 to 92 mm in the first half of the growing season, the grain productivity of spring triticale varieties was less than 3 t/ha. Under more favorable conditions of soil moistening (154 mm), the yield was almost 4 t/ha, which is a very good indicator for the conditions of Mari El Republic. Against the background of the application of mineral fertilizers in doses of N30-60P60K60, the grain productivity of varieties increased: Rovnya by 20-33 %, Saur ‒ 57-78 %, Savva ‒ 5-22 %, Timur ‒ 39-77 %, Dobroye ‒ 42-60 %, Zaozerye ‒ 38-40 %, KNIISKH 9 ‒ 16-40 %, KNIISKH 11 ‒ 12-30 %, KNIISKH 22 ‒ 22-28 %. On average, over three years of research, the varieties of spring triticale Dobroye (3.43 t/ha), Savva (3.12 t/ha) and KNIISKH 9 (3.26 t/ha) were characterized by a weak reaction to unfavorable soil moisture conditions and provided consistently high productivity of feed grain. The case of Dobroye variety, the most optimal variant for cultivating spring triticale in a simulated agrophytocenosis with a seeding rate of 4 million germinating seeds per hectare when applying N60P30K30 is established. On average for two years of the research the yield of this variety has reached 4.12 t/ha with a seeding rate of 4 million germinating seeds per hectare, which is 8 % higher than the control (3 million germinating seeds per hectare) and 22 % higher than in the variant with a seeding rate of 5 million pcs/ha.

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Aminova, E. V., A. A. Mushinskiy e E. M. Feshchenko. "Promising varieties and forms of golden currant (Ribes aureum Pursh.) in the conditions of the steppe zone of the Southern Urals". Pomiculture and small fruits culture in Russia 62 (1 ottobre 2020): 9–15. http://dx.doi.org/10.31676/2073-4948-2020-62-9-15.

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The article presents the results of many years of work on the study of golden currant (Ribes aureum Pursh.) in the conditions of the steppe zone of the Southern Urals. The study was carried out on the experimental plot of Orenburg Experimental Station of Horticulture and Viticulture in the 2009-2019. The object of research was varieties Samocvet, Uralskaya and forms 1-7, 2-1, 2-9, 2-6, 3-2 of golden currant. The soil cover of the experimental site was represented by ordinary chernozem, the humus content in the arable layer was 2.7-3.0 %, the phosphorus content was 18.4 mg/kg, potassium – 358.6 mg/kg, nitrogen – 96.6 mg/kg. There was shown the development of the scientific foundations of crop breeding in the steppe zone of the Southern Urals, where the gene pool was first created, from which new varieties with a complex of economically valuable traits were developed, and promising forms were identified. As a result of the research, promising varieties and forms were distributed by maturation period into 2 groups: medium (Samotsvet, Uralskaya, 1-7, 2-1, 2-9) and late (2-6, 3-2). Adapted varieties (Samotsvet, Uralskaya) and forms (2-6, 2-1) were revealed, which are distinguished by high productivity from a bush (from 4.8 to 5.6 kg), number of berries in a cluster (from 4.6 to 6 pcs. ), berry weight (from 3.4 to 4.1 g). A brief economic and biological characteristics of selected forms and varieties are given.

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Zhou, Ze Long, Chen Mei, Xiang Yong Su, Tao Li e Yi Tao. "A Novel Method to Fabricate Silicon-Beam with Polygon Section Based on Thermal Oxidation Layer Protection Technique". Applied Mechanics and Materials 526 (febbraio 2014): 80–85. http://dx.doi.org/10.4028/www.scientific.net/amm.526.80.

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Simplex wet etching method to fabricate silicon-beam has limited the categories of silicon-beam, it has confined the design and fabrication of silicon-beam with polygon section. Moreover, due to the side-etching of sidewalls and arris during the process of wet etching, the sections of the fabricated silicon-beam are not identical, which will induce the mechanics characters of silicon-beam to be altered, depressing the quality of silicon-beam; In order to avoid the shortages above, a novel method to fabricate silicon-beam with polygon section based on thermal oxidation layer technique is proposed, thermal oxidation SiO2 layer is utilized as the protection layer of the sidewalls of the silicon-beam instead of the mask layer as usual for the first time. Combining the wet etching technique with the thermal oxidation technique innovatively, several varieties of silicon-beam with polygon section, which can hardly be obtained only by the use of wet etching technique, can be manufactured, respectively. Based on such an innovative method, this paper proposes and develops five varieties of silicon-beam with novel structure by means of adjustable mask layer, extending the application field of wet etching. The subsequent fabrication experiment of silicon-beam with hexagonal section has been taken as an example to validate the technique principle. The dimension parameters of silicon-beam have been tested precisely and the arris angle error between the theoretic value and the experimental measurement is less than 1.5%; The SEM photos with the amplifier of 100 and 250 have been obtained through HITACHI S-4800 field emission scanning electron microscope (FE-SEM), the SEM results have demonstrated the clear sidewall arris without undercut. Through this fabrication method, the sidewall arris of silicon-beam can be maintained due to the protection layer of thermal oxidation SiO2. In this manner, the arris disfigurement of the silicon-beam decreases dramatically, the process of etching can be controlled precisely, and the quality of the silicon-beam has been improved greatly.

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Più fonti

Tesi sul tema "First-Layer varieties"

D'accardio, Berlinguer Alessia. "The Arabic Spoken in Kairouan (Tunisia) : towards a Reassessment of the Arabization of Northern Africa". Electronic Thesis or Diss., Paris, INALCO, 2024. http://www.theses.fr/2024INAL0008.

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Cette thèse comble un vide dans le domaine de la dialectologie maghrébine, en proposant une description en synchronie de la phonologie et de la morphologie de l’arabe parlé à Kairouan, en Tunisie. Elle présente et analyse les résultats de plusieurs enquêtes de terrain. L’approche fonctionnaliste de cette thèse se base sur le modèle des études en dialectologie comparée les plus solides et consiste à analyser l’arabe kairouanais en le comparant à d’autres variétés d’arabe qui lui sont géographiquement et typologiquement proches. L'analyse variationniste des données linguistiques est également utilisée, prenant en compte les paramètres sociolinguistiques des locuteurs. Cette étude s’insère également dans le débat sur la réévaluation de la classification traditionnelle de l’arabe maghrébin. Dans le cadre de cette problématique, je remets en cause la validité de l’origine monogénétique kairounaise de l’arabe maghrébin de première couche et la définition des « parlers kairouanais » proposée par David Cohen. Afin de mieux cerner la démonstration linguistique, je m’intéresse aux événements historiques et sociaux majeurs qui ont accompagné le début des deux couches d’arabisation au Maghreb (VIIe - XIe siècle). En outre, j’analyse le développement diachronique et la distribution synchronique de trois isoglosses de l’arabe de première couche dans des variétés anciennes et contemporaines au Maghreb. En somme, la description grammaticale de l’arabe kairouanais, la focalisation socio-historique sur le passé de la ville, ainsi que la comparaison diachronique et diatopique contribuent à montrer la faiblesse de l’origine monogénétique kairouanaise de l’arabe maghrébin de première couche
This dissertation provides a comprehensive description of the phonology and morphology of the Arabic variety spoken in the city of Kairouan (Tunisia). The phonological and morphological description results from the analysis of narrative texts and questionnaires I collected during field research. My description is based on the functionalism methodological approach commonly applied in the most significant studies of descriptive and comparative Maghrebi Arabic dialectology. This approach also includes comparative remarks on geographically and typologically related varieties of Arabic. Moreover, I embrace the variationist analysis based on different sociolinguistic parameters. Furthermore, this dissertation aims at contributing to the debate about the reassessment of the traditional classification of Maghrebi Arabic. It questions the validity of the monogenetic origin of first-layer Maghrebi Arabic from ancient Kairouani Arabic and David Cohen’s theory on the parlers kairouanais. In doing so, this study focuses on the major historical phases and social phenomena occurring in the Maghreb (7th - 11th centuries) in correspondence with the beginning of the two so-called waves of Arabization. From a comparative point of view, I analyze the diachronic development and the synchronic distribution of three isoglosses in first-layer Arabic across present-day and more ancient varieties. This socio-historical focus and diachronic and diatopic comparison of this study contribute to showing the weakness of the Kairouani monogenetic origin of first-layer Maghrebi

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Capitoli di libri sul tema "First-Layer varieties"

Ajana El Khaddar, Mehdia. "Middleware Solutions for the Internet of Things: A Survey". In Middleware Architecture. IntechOpen, 2021. http://dx.doi.org/10.5772/intechopen.100348.

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The Internet of Things (IoT), along with its wider variants including numerous technologies, things, and people: the Internet of Everything (IoE) and the Internet of Nano Things (IoNT), are considered as part of the Internet of the future and ubiquitous computing allowing the communication among billions of smart devices and objects, and have recently drawn a very significant research attention. In these approaches, there are varieties of heterogeneous devices empowered by new capabilities and interacting with each other to achieve specific applications in different domains. A middleware layer is therefore required to abstract the physical layer details of the smart IoT devices and ease the complex and challenging task of developing multiple backend applications. In this chapter, an overview of IoT technologies, architecture, and main applications is given first and then followed by a comprehensive survey on the most recently used and proposed middleware solutions designed for IoT networks. In addition, open issues in IoT middleware design and future works in the field of middleware development are highlighted.

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Zürn, Michael, e Johannes Gerschewski. "The Liberal Script: A Reconstruction". In The Liberal Script at the Beginning of the 21st Century, 25–46. Oxford University PressOxford, 2024. http://dx.doi.org/10.1093/oso/9780198924241.003.0002.

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Abstract This contribution submits a specific description of the contemporary liberal script based on a sociological reconstruction. A script consists of a complex set of prescriptive and descriptive statements and a specific grammar that points to the relationship between them. We start by identifying the first layer of the liberal script, understood as the justificatory basis for developing additional components. Then, we discuss additional components that speak to societal, economic, political, and cross-cutting issues of a liberal script. Since there is no single, unambiguous thing called liberalism, we identify varieties of the liberal script, i.e. a class with differing ideas that show significant commonalities and overlaps. We do so by considering on the one hand a set of concepts that share a family resemblance, as Wittgenstein described. On the other hand, we carve out the most critical tensions between these concepts.

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"are purified lipid contents and others are not, and the puri-(Paspalum scrobiculatum), and barnyard (Echinocloa fied lipid content depends on the purification method. colona). Sridhar and Lakshminarayana [32] also reported Starch lipids (SL) are those bound to starch, and they FL contents of 5.0, 5.6, and 2.2% for Proso, Foxtail, and are the most difficult to extract. Since true SL are present Finger millet, respectively. Taira [45] found slightly high-inside the starch granules, even a very polar solvent such er average FL (ether extraction) contents for glutinous as WSB cannot extract them at ambient temperature. Effi-foxtail millet (4.2-5.1%, average 4.7% of 21 samples) cient extraction of SL requires mixtures of hot aqueous al-than for nonglutinous foxtail millet (4.0-4.7%, average cohol in proportions optimized for controlled swelling of 4.4% of 31 samples). Among millet, pearl millet contains the starch granules and solubilization of the lipids [25]. the most FL. The best solvents are n-propanol or isopropanol with water Lipid contents of rice in Table 2 were cited by Morrison (3:1, by volume) used under nitrogen at 100°C. However, [3] using the data of Nechaev and Sandler [2]. Taira and some n-butanol—water and methanol-water mixtures also Chang [46] reported that the average nonglutinous brown are reasonably efficient extraction solvents at 100°C [25]. rice FL (ether extraction) contents of 20 varieties each of Recently, a third lipid category was introduced. Starch sur-Indica and Japonica types were 2.7% (2.38-2.91%) and face lipids (SSL) are portions of the nonstarch lipids 2.9% (2.54-3.58%), respectively. More recently, Taira et (NSL), which become firmly absorbed onto or into starch al. [47] reported the average FL contents of 15 nongluti-granules during the separation of pure starch [24]. nous varieties as 2.5% (2.24-2.97%) for Indica, 2.5% Lipids are minor components of the cereal grains shown (2.12-2.94%) for Japonica, 2.7% (2.35-3.03%) for Sinica, in Table 2. Data in this table, expressed on a dry basis, and 2.6% (2.11-2.99%) for Japonica types. were calculated from reported values [3,16,26-41]. Also, some BL or TL contents were calculated by subtracting FL from TL or by adding FL to BL, depending on the avail-B. Nonstarch Lipid Classes of Grains ability of data. The FL contents range from 1.5 to 2% of Lipids can be separated into three broad classes by open-the kernel weights of barley, rice, rye, triticale, and wheat column silicic acid chromatography. Nonpolar lipids (NL) grains. They range from 3 to 7% of the kernel weights of are first eluted by chloroform, glycolipids (GL) are eluted oats, millet, corn, and sorghum. However, BL contents in next by acetone, and phospholipids (PL) are eluted last grains are more uniform than FL contents. Therefore, the with methanol. Mixtures of GL and PL are polar lipids FL:BL ratio is substantially higher for corn, millet, oats, (PoL). After NL elution from a silicic acid column, PoL and sorghum than for rye, triticale, and wheat grains. The can be eluted with methanol without the GL elution step. FL:BL ratios for barley and rice are intermediate. Lipids can also be separated into various classes by thin-High oil-containing grains such as corn are continuous-layer chromatography (TLC) using different development ly bred for higher oil content with improved production solvent systems. Each individual lipid class migrates dif-yield. Application of wide-line NMR spectroscopy for ferently on the thin-layer plate, and the difference in mi-nondestructive analysis of the oil content in single corn gration rates makes it possible to separate complex lipids kernels made selection for higher oil content more efficient into classes. The NL consists of SE, TG, DG, MG, and [42]. Corn hybrids with 6-8.5% oil content and grain FFA (see Table 1). The total NL content is obtained by yields equal to those of good commercial hybrids were adding these NL class contents as measured by densitome-produced [43]. try. Thus, the NL content of samples may differ, to some Several kinds of millet exist, and the lipid data in the extent, depending on methodology used (column separa-literature are confusing. Rooney compared the FL (ether tion or TLC separation). extraction) contents of several types of millet in a review The data [1,13,27,29,32,36-38,40,48-58] shown in paper [16]. The average FL contents of pearl millet (Pen-Table 3 may be used for only approximate comparison of nisetum typhoids) were 5.1% (4.1-5.6%, 14 samples), the NL content from different grains because some were 5.4% (2.8-8.0%, 167 samples, [44]), 5.6% (4.3-7.1%, 40 obtained by column chromatography and some by TLC. samples), and 6.2% (4.2-7.4%, 35 samples) [16]. Other All cereal grain lipids are richer in NL than in other class-reported average FL contents were 4.8% (4.6-5.0%, 6 es: 60-70% of the TL are NL in wheat (hexaploid), triti-samples) for foxtail millet (Setaria Italica), 5.8% cale, and rye; 65-80% for barley and oat groats; 77-87% (5.5-6.3%, 6 samples) for Japanese millet (Echinochloa for sorghum and rice; and 75-96% for corn and millet crusgalli), and 4.2% (3.8-4.9%, 20 samples) for proso (Pennisetum americanum). Sridhar and Lakshminarayana millet (Panicum miliaceum) [16]. Sridhar and Lakshmi-[32] reported 82, 80, and 79% of NL for Foxtail, Proso, narayana [30] reported a FL content range of 3.4-5.7% for and Finger millet, respectively. There are significant vari-small millet, including little (Panicum sumatrense), kodo etal effects on the NL/PoL ratio for corn and millet (P." In Handbook of Cereal Science and Technology, Revised and Expanded, 434. CRC Press, 2000. http://dx.doi.org/10.1201/9781420027228-43.

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Rapporti di organizzazioni sul tema "First-Layer varieties"

Schaffer, Arthur A., e Jocelyn Rose. Understanding Cuticle Development in Tomato through the Study of Novel Germplasm with Malformed Cuticles. United States Department of Agriculture, giugno 2013. http://dx.doi.org/10.32747/2013.7593401.bard.

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Plant cuticle development and metabolism are still poorly understood, partly due to the chemical complexity of the cuticular layer. The overall research objective was to broaden and deepen our understanding of tomato fruit cuticle development by analyzing novel germplasm with cuticular malformations and by studying the transcriptome and proteome of the fruit epidermal tissues, as strategies to overcome the challenges posed by the recalcitrance of the biological system. During the project we succeeded in identifying two genes with major impact on cuticle development. One of these encoded the first cutin synthase to be identified in plants, a metabolic step that had been a black box in cutin synthesis. In addition genes controlling the triterpenoid components of the cuticle were identified and, most interestingly, genetic variability for this component was identified among the wild tomato species germplasm. Additional germplasm was developed based on interspecific crosses that will allow for the future characterization of modifier genes that interact with the microfissuring gene (CWP) to promote or inhibit fruit cracking. One of the major accomplishments of the joint project was the integrated transcriptomic and proteomic analysis of the fruit cuticle and underlying tissues which allows for the identification of the pericarp cell layers responsible for the extracellular, cuticle-localized protein component. The results of the project have expanded our understanding of tomato fruit cuticle development and its genetic control. In addition, germplasm developed will be useful in developing tomato varieties resistant to cracking, on the one hand, and varieties useful for the dehydration industry on the other.

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Galili, Naftali, Roger P. Rohrbach, Itzhak Shmulevich, Yoram Fuchs e Giora Zauberman. Non-Destructive Quality Sensing of High-Value Agricultural Commodities Through Response Analysis. United States Department of Agriculture, ottobre 1994. http://dx.doi.org/10.32747/1994.7570549.bard.

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The objectives of this project were to develop nondestructive methods for detection of internal properties and firmness of fruits and vegetables. One method was based on a soft piezoelectric film transducer developed in the Technion, for analysis of fruit response to low-energy excitation. The second method was a dot-matrix piezoelectric transducer of North Carolina State University, developed for contact-pressure analysis of fruit during impact. Two research teams, one in Israel and the other in North Carolina, coordinated their research effort according to the specific objectives of the project, to develop and apply the two complementary methods for quality control of agricultural commodities. In Israel: An improved firmness testing system was developed and tested with tropical fruits. The new system included an instrumented fruit-bed of three flexible piezoelectric sensors and miniature electromagnetic hammers, which served as fruit support and low-energy excitation device, respectively. Resonant frequencies were detected for determination of firmness index. Two new acoustic parameters were developed for evaluation of fruit firmness and maturity: a dumping-ratio and a centeroid of the frequency response. Experiments were performed with avocado and mango fruits. The internal damping ratio, which may indicate fruit ripeness, increased monotonically with time, while resonant frequencies and firmness indices decreased with time. Fruit samples were tested daily by destructive penetration test. A fairy high correlation was found in tropical fruits between the penetration force and the new acoustic parameters; a lower correlation was found between this parameter and the conventional firmness index. Improved table-top firmness testing units, Firmalon, with data-logging system and on-line data analysis capacity have been built. The new device was used for the full-scale experiments in the next two years, ahead of the original program and BARD timetable. Close cooperation was initiated with local industry for development of both off-line and on-line sorting and quality control of more agricultural commodities. Firmalon units were produced and operated in major packaging houses in Israel, Belgium and Washington State, on mango and avocado, apples, pears, tomatoes, melons and some other fruits, to gain field experience with the new method. The accumulated experimental data from all these activities is still analyzed, to improve firmness sorting criteria and shelf-life predicting curves for the different fruits. The test program in commercial CA storage facilities in Washington State included seven apple varieties: Fuji, Braeburn, Gala, Granny Smith, Jonagold, Red Delicious, Golden Delicious, and D'Anjou pear variety. FI master-curves could be developed for the Braeburn, Gala, Granny Smith and Jonagold apples. These fruits showed a steady ripening process during the test period. Yet, more work should be conducted to reduce scattering of the data and to determine the confidence limits of the method. Nearly constant FI in Red Delicious and the fluctuations of FI in the Fuji apples should be re-examined. Three sets of experiment were performed with Flandria tomatoes. Despite the complex structure of the tomatoes, the acoustic method could be used for firmness evaluation and to follow the ripening evolution with time. Close agreement was achieved between the auction expert evaluation and that of the nondestructive acoustic test, where firmness index of 4.0 and more indicated grade-A tomatoes. More work is performed to refine the sorting algorithm and to develop a general ripening scale for automatic grading of tomatoes for the fresh fruit market. Galia melons were tested in Israel, in simulated export conditions. It was concluded that the Firmalon is capable of detecting the ripening of melons nondestructively, and sorted out the defective fruits from the export shipment. The cooperation with local industry resulted in development of automatic on-line prototype of the acoustic sensor, that may be incorporated with the export quality control system for melons. More interesting is the development of the remote firmness sensing method for sealed CA cool-rooms, where most of the full-year fruit yield in stored for off-season consumption. Hundreds of ripening monitor systems have been installed in major fruit storage facilities, and being evaluated now by the consumers. If successful, the new method may cause a major change in long-term fruit storage technology. More uses of the acoustic test method have been considered, for monitoring fruit maturity and harvest time, testing fruit samples or each individual fruit when entering the storage facilities, packaging house and auction, and in the supermarket. This approach may result in a full line of equipment for nondestructive quality control of fruits and vegetables, from the orchard or the greenhouse, through the entire sorting, grading and storage process, up to the consumer table. The developed technology offers a tool to determine the maturity of the fruits nondestructively by monitoring their acoustic response to mechanical impulse on the tree. A special device was built and preliminary tested in mango fruit. More development is needed to develop a portable, hand operated sensing method for this purpose. In North Carolina: Analysis method based on an Auto-Regressive (AR) model was developed for detecting the first resonance of fruit from their response to mechanical impulse. The algorithm included a routine that detects the first resonant frequency from as many sensors as possible. Experiments on Red Delicious apples were performed and their firmness was determined. The AR method allowed the detection of the first resonance. The method could be fast enough to be utilized in a real time sorting machine. Yet, further study is needed to look for improvement of the search algorithm of the methods. An impact contact-pressure measurement system and Neural Network (NN) identification method were developed to investigate the relationships between surface pressure distributions on selected fruits and their respective internal textural qualities. A piezoelectric dot-matrix pressure transducer was developed for the purpose of acquiring time-sampled pressure profiles during impact. The acquired data was transferred into a personal computer and accurate visualization of animated data were presented. Preliminary test with 10 apples has been performed. Measurement were made by the contact-pressure transducer in two different positions. Complementary measurements were made on the same apples by using the Firmalon and Magness Taylor (MT) testers. Three-layer neural network was designed. 2/3 of the contact-pressure data were used as training input data and corresponding MT data as training target data. The remaining data were used as NN checking data. Six samples randomly chosen from the ten measured samples and their corresponding Firmalon values were used as the NN training and target data, respectively. The remaining four samples' data were input to the NN. The NN results consistent with the Firmness Tester values. So, if more training data would be obtained, the output should be more accurate. In addition, the Firmness Tester values do not consistent with MT firmness tester values. The NN method developed in this study appears to be a useful tool to emulate the MT Firmness test results without destroying the apple samples. To get more accurate estimation of MT firmness a much larger training data set is required. When the larger sensitive area of the pressure sensor being developed in this project becomes available, the entire contact 'shape' will provide additional information and the neural network results would be more accurate. It has been shown that the impact information can be utilized in the determination of internal quality factors of fruit. Until now,

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