scholarly journals Typification of Blechnum spicant var. fallax Lange (Blechnaceae)

2017 ◽  
Vol 86 (1) ◽  
Author(s):  
Paweł Wąsowicz ◽  
Łukasz Folcik ◽  
Adam Rostański
Keyword(s):  
Plant Material ◽  
Hot Springs ◽  
Original Material ◽  
Single Plant ◽  
Blechnum Spicant

<em>Blechnum spicant</em> var. <em>fallax</em> Lange is a fern taxon endemic to Iceland where it occurs in the vicinity of hot springs on geothermally heated soils. The taxon was first described by a Danish botanist Johan Martin Christian Lange in 1880 on the basis of plant material collected by Christian Grønlund in Iceland. Because its holotype was not designated in the protologue, we examined the extant original material including illustrations from <em>Flora Danica</em> and a single plant on sheet C10021769 (deposited in C) that was the basis for the respective plate. We select this specimen as the lectotype of <em>Blechnum spicant</em> var. <em>fallax</em>.

Lectotype of Solidago ×niederederi (Asteraceae) selected from a recently rediscovered original material

Phytotaxa ◽  
2020 ◽  
Vol 438 (1) ◽  
pp. 62-64
Author(s):  
KATARÍNA SKOKANOVÁ ◽  
PAVOL MEREĎA Jr. ◽  
BARBORA ŠINGLIAROVÁ ◽  
STANISLAV ŠPANIEL
Keyword(s):  
Plant Material ◽  
Herbarium Specimens ◽  
Solidago Canadensis ◽  
Original Material ◽  
Field Margins ◽  
Forest Edges ◽  
Hybrid Species ◽  
Living Material ◽  
The 19Th Century ◽  
First Time

Solidago ×niederederi Khek (1905: 22) is a hybrid between North-American S. canadensis Linnaeus (1753: 878) and European native S. virgaurea Linnaeus (1753: 880). Solidago canadensis was introduced to Europe in the 17th century (Kowarik 2003). It has spread invasively throughout Europe since the second half of the 19th century (Weber 1998), reaching, besides sites disturbed by human activity, also (semi)natural biotopes, as forest edges, abandoned meadows and field margins which are often inhabited by native S. virgaurea. Their hybrid was discovered for the first time in nature by a local schoolmaster Franz Niedereder in the area of Vorderstoder village (Austria). Niedereder sent a plant material of the assumed hybrid to Eugen Johan Khek (born in 1861, Neuhaus/Jindřichov Hradec; died in 1927, Vienna), the pharmacist and botanist who lived in Vienna since 1889 (Anonymous 1916). Khek described the hybrid species under the name S. ×niederederi in honour of his discoverer (Khek 1905). The protologue indicates that the relevant communication between Niedereder and Khek was going on between July 1900 (when they met for the first time) and February 1905 (when the hybrid’s description was published). Before its description, Khek studied the hybrid for four years and he saw a herbarium material from Niedereder as well as a living material. In the protologue, no particular herbarium specimens or illustrations had been indicated or associated with S. ×niederederi (Khek 1905).

Studies on carotene in relation to animal nutrition: Part I. The technique of carotene estimation in feeding stuffs

1942 ◽  
Vol 32 (2) ◽  
pp. 194-201 ◽  
Author(s):  
P. A. Seshan ◽  
K. C. Sen
Keyword(s):  
Statistical Analysis ◽  
Plant Material ◽  
Animal Nutrition ◽  
Original Material ◽  
Carotene Content ◽  
Recovery Test ◽  
Modified Method ◽  
Alcoholic Potash ◽  
Hydrolysis Of

A modified method of estimating the carotene content of plant material has been described in detail. The modifications include a combined aqueous and alcoholic potash hydrolysis of the original material before extraction is carried out.A statistical analysis and a recovery test have shown this method to be relatively more efficient than methods similar to those described by other workers.

scholarly journals NANOFIBRILLATED CELLULOSE, THE SMALL PROMISING FIBER: CHARACTERISTICS AND POTENTIALITIES

FLORESTA ◽  
2019 ◽  
Vol 49 (3) ◽  
pp. 411
Author(s):  
Eliane Lopes da Silva ◽  
Helena Cristina Vieira ◽  
Joielan Xipaia dos Santos ◽  
Cyro Ketzer Saul ◽  
Silvana Nisgoski ◽  
...  
Keyword(s):  
Plant Material ◽  
Crystallinity Index ◽  
Nanofibrillated Cellulose ◽  
Decomposition Temperature ◽  
Degree Of Polymerization ◽  
Nanometer Scale ◽  
Infrared Analysis ◽  
Original Material ◽  
Cellulose Pulp ◽  
Eucalyptus Pulp

Cellulose: an abundant, biodegradable and renewable plant material that is available all around the globe, from which nanofibrillated cellulose (a homogeneous suspension of fibers with nanometer-scale diameters) can be extracted. The nanofibrillated cellulose, in what concerns its range of application, may completely or partially replace other materials due to its particular physical properties. Knowing its characteristics and properties is important in understanding its behavior in various applications. In light of this remarks, the objective of this research was to extract the nanocellulose from bleached eucalyptus pulp through mechanical milling to characterize the resulting nanofibrillated cellulose and compare both. The nanofibrillated cellulose presented a very distinct appearance in relation to the original cellulose pulp when they were analysed in the same concentrations, demonstrating greater water absorption and fibrillar interweaving. The nanofibrillated material showed different responses in comparison to the original in terms of dimensions, thermal stability, crystallinity, viscosity, and degree of polymerization. The nanofibrillated cellulose displays the same chemical composition through infrared analysis and has diameters of around 21.7 nm, smaller than the cellulose diameter of 11.4 μm. The nanofibrillated cellulose also exhibits lower thermal resistance: its decomposition temperature was about 20 ºC lower than that of the original cellulose pulp, and its crystallinity index has decreased. As for viscosity and degree of polymerization, there was reduction of 25% compared to the original material. The results presented hereby indicate that the nanofibrillated cellulose has unique features in relation to the original cellulose pulp, which supports its application as an alternative to existing materials.

Experimental methods with cotton VI. The determination of staple-length in single plant selections and variety trials

1948 ◽  
Vol 38 (2) ◽  
pp. 158-162
Author(s):  
W. L. Fielding
Keyword(s):  
Plant Material ◽  
Experimental Methods ◽  
Single Plant ◽  
Cotton Variety ◽  
Variety Trial ◽  
Comparative Accuracy ◽  
Level Of Significance ◽  
Number Of Seeds ◽  
Staple Length

SUMMARY1. A study of different methods of staple-length measurement of material from a cotton variety trial, of the comparative accuracy of three persons' measurements and of the number of seeds which it is necessary to measure in order to achieve various degrees of accuracy in the determination of differences in variety trial and single plant material is described.2. If, in making single plant selections, the breeder is satisfied with a level of significance of P =0·1 when using a sample of only five seeds per plant, he would be justified in discarding material falling one and a half millimetres below the standard of staple-length at which he was aiming.

Timing Control Efforts to Limit Seed Set of Common Mullein (Verbascum thapsus)

2012 ◽  
Vol 5 (3) ◽  
pp. 390-394 ◽  
Author(s):  
Hannah D. Wilbur ◽  
Ruth A. Hufbauer
Keyword(s):  
Plant Material ◽  
Seed Set ◽  
Reproductive Stage ◽  
Viable Seed ◽  
Single Plant ◽  
Timing Control ◽  
The West ◽  
Verbascum Thapsus ◽  
Control Options ◽  
Common Mullein

Control options for the nonnative common mullein are of increasing interest to land managers in the west. Common mullein is a prolific seed producer, with a single plant able to produce well over 100,000 seeds. We found that mechanical control of common mullein before mature seed capsules developed along the raceme significantly reduced viable seed production. Seeds from immature capsules had very low viability (early reproductive stage = 0.08%, 95% CI = 0.06%, 0.67%; mid reproductive stage = 1.52%, 95% CI = 0.49%, 3.11%). This information allows managers to time their management efforts so that they can reduce the amount of plant material that must be disposed of in order to control the spread of common mullein seeds.

scholarly journals Typification of names published by Schultz “Bipontinus” in the Andryala pinnatifida complex (Cichorieae, Asteraceae), from the Canary Islands

2020 ◽  
Vol 77 (1) ◽  
pp. 093
Author(s):  
Maria Zita Ferreira ◽  
Inés Álvarez Fernández ◽  
Miguel Menezes de Sequeira
Keyword(s):  
Canary Islands ◽  
Plant Material ◽  
Species Complex ◽  
Taxonomic Revision ◽  
Original Material ◽  
Histoire Naturelle

Schultz “Bipontinus” (1805-1867) described, in the Histoire Naturelle des Îles Canaries published by Webb and Berthelot in 1849, several forms of the Andryala pinnatifida complex, endemic to the Canary Islands, based on plant material collected by E. Bourgeau and P. B. Webb. In order to facilitate a forthcoming taxonomic revision of this species complex, some of the names established by Schultz “Bipontinus” are here lectotypified based on protologue analysis and the examination of original material located at P and FI-W herbaria.

BIOEFFICACY OF PLANT EXTRACTS AGAINST MUSTARD APHID AND THEIR NATURAL ENEMIES

2019 ◽  
Vol 25 (1) ◽  
Author(s):  
NARENDRA SINGH ◽  
N. S. BHADAURIA ◽  
PRADYUMN SINGH
Keyword(s):  
Plant Extracts ◽  
Natural Enemies ◽  
Untreated Control ◽  
Plant Material ◽  
Aphid Population ◽  
College Of Agriculture ◽  
Mustard Aphid ◽  
Plant Materials

The Bio-efficacy of eleven plant extracts namely viz.Neem Kernel; Rhizome of Ginger; Leaves of Datura, Gajarghas, Harsingar, Oak and Latjeera; Bulb of Garlic and Onion; Flowers of Chrysenthemum and Fruits of Chilli in the concentration of 5 percent and imidacloprid @ 40 g ai/ha was tested against mustard aphid, Lipaphiserysimi and their effect on D. rapae and Coccinellid beetle were tested in the Department of Entomology, College of Agriculture, Gwalior (M.P.). All the tested plant materials and imidacloprid @ 40 g ai/ha were effective significanty in reducing the aphid population over control.The aphid population in treated plots ranged from 7.2 to 40.0 as against 85.4 aphid/twig in untreated control. Among the plant material, three sprays of Neem Kernel were found most effective followed by three sprays of chilli fruits.All the plant extracts were found significantly safer to D. rapae and coccinellid bettle in comparision to insecticide (imidacloprid).

EVALUATION OF CLOVERS ON SANDY COASTAL SOIL

1977 ◽  
pp. 130-138 ◽  
Author(s):  
W.M. Williams ◽  
L.B. Anderson ◽  
B.M. Cooper
Keyword(s):  
New Zealand ◽  
Drought Stress ◽  
Sandy Soil ◽  
White Clover ◽  
Plant Material ◽  
Red Clover ◽  
Early Spring ◽  
Commercial Cultivars ◽  
Mediterranean Origin ◽  
Winter Annual

In evaluations of clover performances on summer-dry Himatangi sandy soil, it was found that none could match lucerne over summer. Emphasis was therefore placed on production in autumn-winter- early spring when lucerne growth was slow. Evaluations of some winter annual clover species suggested that Trifolium spumosum, T. pallidum, T. resupinatum, and T. vesiculosum would justify further investigation, along with T. subterraneum which is already used in pastures on this soil type. Among the perennial clover species, Kenya white clover (7'. semipilosum) showed outstanding recovery from drought and was the only species to produce significantly in autumn. However, it failed to grow in winter-early spring. Within red clover, materials of New Zealand x Moroccan origin substantially outproduced the commercial cultivars. Within white clover, material from Israel, Italy and Lebanon, as well as progeny of a selected New Zealand plant, showed more rapid recovery from drought stress and subsequently better winter growth than New Zealand commercial material ('Grasslands Huia'). The wider use of plant material of Mediterranean origin and of plants collected in New Zealand dryland pastures is advocated in development of clover cultivars for New Zealand dryland situations.

The Hot Springs Conference

1945 ◽  
Vol 14 (2) ◽  
pp. 16-22
Author(s):  
William C. Johnstone
Keyword(s):  
Hot Springs
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