Germination of Tropical Forage Seeds Stored in Ambient and Controlled Temperature and Humidity Conditions

Storage of tropical forage seeds in the humid tropics is crit-ical in order to safeguard germination. Storing Mulato hybrid brachiaria (Brachiaria ruziziensis x B. brizantha) seed under ambient conditions could be safely done for 8-12 months in Thailand, but rapid deterioration in viability occurred with longer storage, with seed being totally non-viable after 20 months storage (Hare et al. 2008). However, Mulato seeds kept in cold storage (10°C and 40% RH) for 3 years still maintained 80% germination. Similar results were found in northern Australia (Hopkinson and English 2005) where loss of viability of Panicum maximum, Brachiaria decumbens, Brachiaria humidicola, Setaria sphacelata and Chloris gayana seeds was rapid under am-bient conditions with total death at 3 years. Under cool storage (10°C and 40% RH), maximum seed viability was still maintained after 6 years of storage

The Ursinus Weekly, May 11, 1936

Psych tests rate \u27U\u27 freshmen high • Mothers banquet attended by 350 • Yost commends Stoudt\u27s acting in Holiday given by Curtain Club; four seniors depart • Opera arrangements rapidly progressing • Yearbook will appear next Monday, May 18 • Pancoast, Worster survive noon vote on council head • Clamer preceptress speaks at special vespers service • Sheeder, Heiges represent college at Altoona high • Machine records ballots in men\u27s council elections • Councils plan dance for Friday evening, May 22 • Willauer edits law review • Girls present annual May pageant before large crowd on Patterson field; Elizabeth Evans presides as queen in Dorothea Wieand\u27s The Queen\u27s revels • Brandauer wins fellowship • Survey reveals many athletes are on B and ineligible lists • Lancaster alumni banquet group hears R. C. Johnson • Modern department stores offer the greatest opportunities to graduates for merchandising; economics and the foreign languages are most helpful in choosing educational requirements • Johnsonmen\u27s journey jounces Juniatans, but bears\u27 batsmen beaten by Bucknell • Tennis men down Albright, beaten by Haverford, 6-1 • Grimm, Gaumer only place winners in Dickinson meet • Perkiomen Prep ties cubs in extra inning game, 8-8 • Brodbeck, Derr tied for lead as first half of league ends • Phys-ed students supervise tests for girl\u27s swim permits • Professional speaker delivers lecture to women students • Pre-med speaker tonighthttps://digitalcommons.ursinus.edu/weekly/1961/thumbnail.jp

Effect of Cutting Interval on Yield and Quality of Two \u3cem\u3ePanicum maximum\u3c/em\u3e Cultivars in Thailand

Tanzania guinea grass [Panicum maximum cv. Tanzania (cv. Purple in Thailand)] has been grown in Thailand for over 20 years and has proven to be a high quality forage (Phaikaew et al. 2007). Mombasa guinea grass (Panicum maximum cv. Mombasa) was introduced to Thailand in 2007 and commercial seed production commenced in 2008 because of a demand for seed in central and South America (Hare et al. 2013). It is a larger and taller cultivar than Tanzania. A series of studies have been undertaken at Ubon Ratchathani University, Thailand, to study the agronomic differences between these cultivars. The effects of cutting were examined in the first of these studies

Effect of Cutting Interval on Yield and Quality of Three Brachiaria Hybrids in Thailand

In field trials in Thailand, Brachiaria hybrid cv. Mulato II produced significantly more green leaf, particularly during the dry season, than other brachiaria grasses (Hare et al. 2009). Cultivar Cayman produced more dry matter (DM) than Mulato II in one out of 3 wet seasons, and line BRO2/1794 produced similar DM yields to Mulato II (Pi-zarro et al. 2013). The objective of this field study was to determine the effects of varying cutting intervals on growth and forage quality of hybrid brachiaria grasses in Thailand on infertile soils

An IR Search for Extinguished Supernovae in Starburst Galaxies

IR and Radio band observations of heavily extinguished regions in starburst galaxies suggest a very high SN rate associated with such regions. Optically measured supernova (SN) rates may therefore underestimate the total SN rate by factors of up to 10, due to the high extinction to SNe in starburst regions. The IR/radio SN rates come from a variety of indirect means, however, which suffer from model dependence and other problems. We describe a direct measurement of the SN rate from a regular patrol of starburst galaxies done with K' band imaging to minimize the effects of extinction. A collection of K' measurements of core-collapse SNe near maximum light is presented. Results of a preliminary SN search using the MIRC camera at the Wyoming IR Observatory (WIRO), and an improved search using the ORCA optics are described. A monthly patrol of starburst galaxies within 25 Mpc should yield 1.6 - 9.6 SNe/year. Our MIRC search with low-resolution (2.2" pixels) failed to find extinguished SNe, limiting the SN rate outside the nucleus (at > 15" radius) to less than 3.8 Supernova Rate Units (SRU or SNe/century/10^10 L(solar); 90% confidence). The MIRC camera had insufficient resolution to search nuclear starburst regions, where SN activity is concentrated, explaining why we found no heavily obscured SNe. We conclude that high-resolution, small field SN searches in starburst nuclei are more productive than low resolution, large-field searches, even for our large galaxies. With our ORCA high-resolution optics, we could limit the total SN rate to < 1.3 SRU at 90% confidence in 3 years of observations, lower than the most pessimistic estimate.Comment: AJ Submitted 1998 Dec. 13. View figures and download all as one file at http://panisse.lbl.gov/public/bruce/irs

Impact of Tropical Forage Seed Development in Villages in Thailand and Laos: Research to Village Farmer Production to Seed Export

Seed of six forage species, Mulato II hybrid brachiaria, Cayman hybrid brachiaria, Mombasa guinea, Tanzania guinea, Ubon stylo and Ubon paspalum, are currently being produced by over 1000 smallholder farmers in villages in northeast Thailand and northern Laos, under contract to Ubon Forage Seeds, Faculty of Agriculture, Ubon Ratchathani University, Thailand. The seed is mainly exported overseas (95%) and the remainder is sold within Thailand. Tropical Seeds LLC, a subsidiary of a Mexican seed company Grupo Papalotla, employs the seed producing and seed research group, Ubon Forage Seeds, to manage seed production, seed sales and export, and to conduct research on new forage species.This paper discusses in detail how the development in villages of a smallholder-farmer seed production program has had positive social and economic outcomes for the village seed growers and enabled farmers in other countries to receive high quality forage seeds. The strong emphasis on seed quality, high purity, high vigour and high germination, has had a large impact on tropical pastures in more than twenty tropical countries in Asia, Africa, the Pacific and Central and South America

Energy Spectrum Evolution of a Diffuse Field in Elastic Body Caused by Weak Nonlinearity

We study the evolution of diffuse elastodynamic spectral energy density under the influence of weak nonlinearity. It is shown that the rate of change of this quantity is given by a convolution of the linear energy at two frequencies. Quantitative estimates are given for sample aluminum and fused silica blocks of experimental interest.Comment: 9 pages, 3 figures; revised for better presentatio

Monomer–dimer dynamics and distribution of GPI-anchored uPAR are determined by cell surface protein assemblies

To search for functional links between glycosylphosphatidylinositol (GPI) protein monomer–oligomer exchange and membrane dynamics and confinement, we studied urokinase plasminogen activator (uPA) receptor (uPAR), a GPI receptor involved in the regulation of cell adhesion, migration, and proliferation. Using a functionally active fluorescent protein–uPAR in live cells, we analyzed the effect that extracellular matrix proteins and uPAR ligands have on uPAR dynamics and dimerization at the cell membrane. Vitronectin directs the recruitment of dimers and slows down the diffusion of the receptors at the basal membrane. The commitment to uPA–plasminogen activator inhibitor type 1–mediated endocytosis and recycling modifies uPAR diffusion and induces an exchange between uPAR monomers and dimers. This exchange is fully reversible. The data demonstrate that cell surface protein assemblies are important in regulating the dynamics and localization of uPAR at the cell membrane and the exchange of monomers and dimers. These results also provide a strong rationale for dynamic studies of GPI-anchored molecules in live cells at steady state and in the absence of cross-linker/clustering agents