scholarly journals Mitigation of High Temperature Injury in Oncidium Plants with Pale Green Leaves

2004 ◽  
Vol 42 (1) ◽  
pp. 91-94 ◽  
Author(s):  
Jincai LI ◽  
Xiheng ZHAO ◽  
Shuichiro MATSUI ◽  
Shigenori MAEZAWA
Keyword(s):  
High Temperature ◽  
Green Leaves ◽  
Pale Green

Two new species of Spiloxene (Hypoxidaceae) from the northwestern Cape, South Africa

Bothalia ◽  
2006 ◽  
Vol 36 (2) ◽  
pp. 133-138 ◽  
Author(s):  
D. A. Snijman
Keyword(s):  
South Africa ◽  
New Species ◽  
Western Cape ◽  
Western Cape Province ◽  
Green Leaves ◽  
Two New Species ◽  
Northern Cape ◽  
Pale Green

Newly described are two new species of Spiloxene Salisb.:  S. nana Snijman from the Bokkeveld Escarpment, Northern Cape Province, is a shade-loving plant with narrow, pale green leaves and small, white or rarely cream-coloured flowers; S. pusilla Snijman from the Matsikamma, Gifberg and Pakhuis Mountains. Western Cape Province, resembles S. nana in habit but the yellow- or white-tepalled flowers which are tetramerous or hexamerous have darkly coloured stamens and style and an ovary with a short, solid, narrow prolongation at the apex. Inhabiting rock overhangs formed by quartzitic sandstone sheets, both species are close allies of S. scullyi (Baker) Garside from Namaqualand.

Streptomyces ipomoeae. [Descriptions of Fungi and Bacteria].

1981 ◽  
Author(s):  
J. F. Bradbury
Keyword(s):  
Sweet Potato ◽  
Geographical Distribution ◽  
Ipomoea Batatas ◽  
Sweet Potatoes ◽  
Poor Growth ◽  
Early Stages ◽  
Green Leaves ◽  
Planting Material ◽  
Black Spots ◽  
Pale Green

Abstract A description is provided for Streptomyces ipomoeae. Information is included on the disease caused by the organism, its transmission, geographical distribution, and hosts. HOSTS: On Ipomoea batatas. DISEASE: Soil rot, pox, pit, or ground rot of sweet potato. All underground parts of the plant can be attacked. Dark brown to black spots of varying shapes and sizes are formed on roots, tubers and underground parts of stems. In serious attacks many of the fine feeding roots are either destroyed or more or less malformed. The above-ground parts of the plants then show poor growth and thin, pale green leaves. Yields are drastically reduced on such plants. In the early stages lesions on the root-tubers are covered by the epidermis, but this cracks and breaks up, leaving a hole or pit. These pits can be quite large and may girdle the potato, preventing growth at that point. Continued growth on either side results in a dumbell-shaped, or other misshapen potato. GEOGRAPHICAL DISTRIBUTION: USA, occurring more or less locally in most, if not all, of the States where sweet potatoes are grown. (CMI Map 301, ed. 2, 1975). TRANSMISSION: The disease is soilborne and most infection is thought to take place when plants are set out into already infested fields, but infection can occur in the nursery bed. The pathogen can be spread to new areas in a variety of ways. Infected planting material is probably the most frequent, but contaminated agricultural tools, workers' boots, feet of grazing animals, and even the wheels of vehicles may also play a part. Once established in a field, the organism can continue to live in the soil until the host is present and conditions are right for infection.

Chemical Variations in Hydrothermal White Mica Across the Highland Valley Porphyry Cu-Mo District, British Columbia, Canada

2020 ◽  
Vol 115 (4) ◽  
pp. 903-926 ◽  
Author(s):  
Tatiana Alva-Jimenez ◽  
Richard M. Tosdal ◽  
John H. Dilles ◽  
Gregory Dipple ◽  
Adam J.R. Kent ◽  
...  
Keyword(s):  
British Columbia ◽  
High Temperature ◽  
White Mica ◽  
Porphyry Deposits ◽  
Porphyry Cu ◽  
Form Part ◽  
Similar Vein ◽  
Alkali Elements ◽  
Pale Green ◽  
Porphyry Cu Deposit

Abstract Hydrothermal white mica in the Highland Valley district, British Columbia, is present in high-temperature alteration assemblages in early halo veins and in intermediate-temperature sericitic alteration assemblages in D-type veins. Pale-gray white micas characterize early halo veins in the Valley and Bethsaida zone porphyry Cu-Mo deposits, whereas pale-green white micas form texturally similar vein halos along the margin of the Valley deposit and at the Alwin vein. White micas in the Bethlehem porphyry Cu-Mo deposit form part of a sericitic alteration assemblage associated with D-type veins that overprinted K-silicate–altered rocks. Cation compositions in white micas indicate phengitic compositions trending toward aluminoceladonite. Pale-gray phengitic white micas intergrown with bornite-chalcopyrite-molybdenite contain elevated Na, indicating higher formation temperatures than those that characterize phengitic white micas formed during hydrolytic alteration. Bethlehem phengitic white micas have cation compositions similar to those of pale-green phengitic white micas at the Valley deposit margin, Bethsaida zone margin, and the Alwin vein. The Al-OH absorption wavelengths in pale-gray phengitic white micas are shorter than in pale-green phengitic white mica or phengitic white mica in the sericitic assemblage. In the phengitic white micas, alkali elements substituting in the interlayered site are positively correlated, whereas higher-valence elements substituting into the octahedral site show a greater variability. The data confirms that hydrothermal white-mica chemistry varies between paragenetic stages of a porphyry Cu deposit and between multiple porphyry deposits in a district.

scholarly journals Unblended or Co-blended Composts for Production of Potted Chrysanthemum

HortScience ◽  
1997 ◽  
Vol 32 (3) ◽  
pp. 485A-485
Author(s):  
Catherine S.M. Ku ◽  
John C. Bouwkamp
Keyword(s):  
Poultry Litter ◽  
Beneficial Effects ◽  
Green Leaves ◽  
Dark Green ◽  
Pale Green

Blending compost from various feedstocks may increase the beneficial effects of compost as potting substrate. A factorial treatment combinations included 10 compost combinations, Sunshine Mix and Pro Gro 300S as controls, three compost levels, and three chrysanthemum cultivars. The compost combinations were Compro (CP), poultry litter (PL), PSG polymer dewatered biosolids (PSG), yard trimmings (YT), CP:PL, CP:PSG, CP:YT, PL:PSG, PL:YT, and PSG:YT; all blends were on a 1:1 ratio (v/v). The compost levels were 50%, 75%, 100%; and chrysanthemum cultivars included `Boaldi', `Cherry Davis', and `Yellow Favor'. All treatments were replicated six times. Plants were fertilized with 100 mg/L N from 20N–8.8P–16.6K twice weekly. All compost substrates, except PSG blends produced plants that were shorter than the controls. All compost blends produced similar or greater number of flower than the controls. Plants grown in substrates containing PSG and/or CP produced dark green or green foliages, and other substrates produced plants with pale green leaves. The PSG:PL and PSG: YT blends produced premium-quality plants. All other compost blends produced good-quality plants that were similar to the controls.

scholarly journals The Photosynthetic Characteristics of Different Purple Peppers

Horticulturae ◽  
2021 ◽  
Vol 7 (9) ◽  
pp. 304
Author(s):  
Yu Huang ◽  
Xiaohui Wang ◽  
Wu Miao ◽  
Huan Suo ◽  
Canfang Fu ◽  
...  
Keyword(s):  
High Temperature ◽  
Photosynthetic Rate ◽  
Genetic Stability ◽  
Photosynthetic Characteristics ◽  
Anthocyanin Content ◽  
Strong Light ◽  
Green Color ◽  
Green Leaves ◽  
Purple Color

The yield of pepper with purple leaves (PF) is low, while the pepper with green leaves (GM) is not resistant to strong light and high temperature. In this study, we analyzed the photosynthesis characteristics and genetic stability of their hybrid progenies using PF(CS3) and GM(SJ11-3) as controls. Based on the decreased purple color and increased green color, the hybrid pepper was divided into five groups: Z1, Z2, Z3, Z4 and Z5. Results showed that as the purple color increased, the anthocyanin content in leaves increased. Simultaneously, we found that PF exhibited higher resistance to strong light and high temperature. Thus, the purple hybrid progenies with higher photosynthetic rate were recommended, as they showed higher yield and better resistance to strong light and high temperature.

Influence of Thermo-Mechanical Processing on the Microstructure of Beryllia Dispersed Nickel Alloys

1973 ◽  
Vol 31 ◽  
pp. 184-185
Author(s):  
M.S. Grewal ◽  
S.A. Sastri ◽  
N.J. Grant
Keyword(s):  
High Temperature ◽  
Nickel Alloys ◽  
Thermomechanical Processing ◽  
Cold Work ◽  
High Temperature Strength ◽  
Strengthening Effect ◽  
Mechanical Processing ◽  
Uniform Dispersion ◽  
Oxide Particles ◽  
Nickel Base

Currently there is a great interest in developing nickel base alloys with fine and uniform dispersion of stable oxide particles, for high temperature applications. It is well known that the high temperature strength and stability of an oxide dispersed alloy can be greatly improved by appropriate thermomechanical processing, but the mechanism of this strengthening effect is not well understood. This investigation was undertaken to study the dislocation substructures formed in beryllia dispersed nickel alloys as a function of cold work both with and without intermediate anneals. Two alloys, one Ni-lv/oBeo and other Ni-4.5Mo-30Co-2v/oBeo were investigated. The influence of the substructures produced by Thermo-Mechanical Processing (TMP) on the high temperature creep properties of these alloys was also evaluated.

Application of TEM to Deformation, Wear, and Fracture of Ceramics

1974 ◽  
Vol 32 ◽  
pp. 472-473
Author(s):  
B. J. Hockey
Keyword(s):  
Wear Resistance ◽  
High Temperature ◽  
Mechanical Behavior ◽  
Brittle Materials ◽  
High Temperature Strength ◽  
Wide Range ◽  
Corrosive Environments ◽  
Further Development

Ceramics, such as Al2O3 and SiC have numerous current and potential uses in applications where high temperature strength, hardness, and wear resistance are required often in corrosive environments. These materials are, however, highly anisotropic and brittle, so that their mechanical behavior is often unpredictable. The further development of these materials will require a better understanding of the basic mechanisms controlling deformation, wear, and fracture.The purpose of this talk is to describe applications of TEM to the study of the deformation, wear, and fracture of Al2O3. Similar studies are currently being conducted on SiC and the techniques involved should be applicable to a wide range of hard, brittle materials.

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