scholarly journals Master Bank or Seed Stock Immediate Supplier

2020 ◽  
Author(s):  
Keyword(s):  
Seed Stock

Production of asari (Manila) clams, Ruditapes philippinarum, during the period of harvest decrease in the 2000s in the Banzu tidal area, Tokyo Bay

2020 ◽  
Vol 33 ◽  
pp. 14
Author(s):  
Mitsuharu Toba ◽  
Jun Kakino ◽  
Kazuo Tada ◽  
Yutaka Kobayashi ◽  
Hideharu Tsuchie
Keyword(s):  
Field Investigation ◽  
Ruditapes Philippinarum ◽  
Management Style ◽  
Seed Stock ◽  
Tokyo Bay ◽  
Yearly Variation ◽  
Culture Area ◽  
Stock Biomass ◽  
Tidal Area ◽  
High Level

In Tokyo Bay, the harvestable quantity of asari (Manila) clams Ruditapes philippinarum has been decreasing since the late 1990s. We conducted a field investigation on clam density in the Banzu culture area from April 1988 to December 2014 and collected records spanning January 1986 to September 2017 from relevant fisheries cooperative associations to clarify the relationship between the temporal variation in stock abundance and the production activities of fishermen. The yearly variation in clam abundance over the study period was marked by larger decreases in the numbers of larger clams. A large quantity of juvenile clams, beyond the biological productivity of the culture area, may have been introduced as seed stock in the late 1980s despite the high level of harvestable stock. The declines in harvested quantity began in the late 1990s and may have been caused by decreases in harvestable stock despite the continuous addition of seed stock clams. The harvested quantity is likely to be significantly dependent upon the wild clam population, even within the culture area, as the harvestable quantity was not correlated with the quantity of seed stock introduced during the study period. These declines in harvested quantity may have resulted from a decreasing number of operating harvesters due to the low level of harvestable stock and consequently reduced profitability. Two findings were emphasized. A certain management style, based on predictions of the contributions of wild and introduced clams to future stock biomass, is essential for economically-feasible culturing. In areas with less harvestable stock, actions should be taken to maintain the incomes of harvesters while avoiding overexploitation, even if the total harvest quantity decreases.

A Simple Cultivation Method for Chesapeake BayUlva intestinalisfor Algal Seed Stock

2014 ◽  
Vol 76 (2) ◽  
pp. 127-129 ◽  
Author(s):  
Ji Li ◽  
Patrick Kangas ◽  
Daniel E. Terlizzi
Keyword(s):  
Seed Stock ◽  
Cultivation Method

scholarly journals "How to use ""random"" microseeding before you get your first crystals"

2014 ◽  
Vol 70 (a1) ◽  
pp. C1756-C1756
Author(s):  
Patrick Shaw Stewart
Keyword(s):  
Heterogeneous Nucleation ◽  
Protein Crystallization ◽  
Seed Stock ◽  
Seed Crystals ◽  
Industrial Group ◽  
Metastable Zone ◽  
Initial Crystal

Random Microseed Matrix-Screening (rMMS), where seed crystals are added automatically to random crystallization screens, is a significant recent breakthrough in protein crystallization [1]. One industrial group used the method to solve 38 out of 70 structures generated in a three year period, finding particular success with antibody complexes [2]. rMMS not only produces more hits, it also generates better-diffracting crystals - because crystals are more likely to grow in the metastable zone. This assumes, however, that you have some initial crystal hits to make a seed stock from. This presentation will look at unusual methods of nucleation, including cross-seeding [3], heterogeneous nucleation, and nucleation with precipitants [4].

TECHNOLOGY OF PLANT RAW MATERIALS MICROBIOLOGICAL PROCESSING WITH PLEUROTUS STRAINS FOR FEED PRODUCTS PRODUCTION

2020 ◽  
pp. 405-414
Author(s):  
Veronika Valentinovna Tarnopol’skaya ◽  
Tat'yana Vasil'yevna Ryazanova ◽  
Natal'ya Yur'yevna Demidenko ◽  
Oksana Nikolayevna Eryomenko
Keyword(s):  
Solid State ◽  
Solid State Fermentation ◽  
Solid Phase ◽  
Raw Materials ◽  
Jerusalem Artichoke ◽  
Seed Stock ◽  
Raw Material ◽  
Pine Sawdust ◽  
Plant Raw Materials ◽  
Pure Cultures

A technology for pilot production of feed products via microbiological conversion of plant raw materials (mixed substrate of pine sawdust and vegetative part of Jerusalem artichoke) by Plerotus ostreatus PO-4.1 and Pleurotus djamor PD-3.2 strains is developed. The technology includes hydrodynamic activation of substrate at the seed stock production stage. The overall technology includes three key stages: submerged fermentation of pure cultures of production strains; submerged-solid phase fermentation of hydrodynamicly activated plant raw materials for seed stock production; solid-state fermentation of mechanically ground plant substrate for feed products production. A successful approbation of submerged-solid state fermentation of production strains on media containing 3% of hydrodynamicly activated raw materials allowed for obtaining seed stock with 14.5 g/l yield of submerged mycelium biomass fully adopted for this type of substrate. Further use of this seed stock biomass at the solid state fermentation stage makes the overall process duration three times shorter compared to existing technologies for direct wood waste bioconversion. The pilot plant results show valuable practicability of plant raw material hydrodynamic activation with the purpose of enhancing its bioaccessibility with consequent increase in degree of microbiological conversion. The product of bioconversion contains 14–16% of protein, biofiber, vitamins and minerals and could be considered for successful use as feed by agricultural enterprises.

Experience in establishing a herd book for the local Nguni breed in South Africa

2007 ◽  
Vol 41 ◽  
pp. 25-28
Author(s):  
M.M. Scholtz ◽  
K.A. Ramsay
Keyword(s):  
South Africa ◽  
Genetic Material ◽  
Seed Stock ◽  
Black Farmers ◽  
And Performance

SummaryFor many years the performance of the indigenous livestock of Africa was regarded as inferior. It was only when the results of research and performance recording were published that the value of a breed such as the Nguni was acknowledged. This resulted in an interest in the breed from commercial farmers, which lead to the establishment of a breeder's society in 1986, but with no official pedigrees it was a challenge to establish a herd book.This article describes how the principles of upgrading were initially used to develop a herd book until the Nguni was recognized as an established breed in 1996. Subsequently a system of first registration was implemented. This system caters for emerging black farmers in South Africa who want to become seed stock breeders and allows for the good quality Nguni genetic material available to the communal black farmers to enter the seed stock industry.

scholarly journals A novel microseeding method for the crystallization of membrane proteins in lipidic cubic phase

2016 ◽  
Vol 72 (4) ◽  
pp. 307-312 ◽  
Author(s):  
Stefan Andrew Kolek ◽  
Bastian Bräuning ◽  
Patrick Douglas Shaw Stewart
Keyword(s):  
Membrane Proteins ◽  
Soluble Protein ◽  
Protein Crystallization ◽  
Protein Structures ◽  
Integral Membrane Protein ◽  
Seed Stock ◽  
New Method ◽  
Cubic Phase ◽  
Seed Crystals ◽  
Order Of Magnitude

Random microseed matrix screening (rMMS), in which seed crystals are added to random crystallization screens, is an important breakthrough in soluble protein crystallization that increases the number of crystallization hits that are available for optimization. This greatly increases the number of soluble protein structures generated every year by typical structural biology laboratories. Inspired by this success, rMMS has been adapted to the crystallization of membrane proteins, making LCP seed stock by scaling up LCP crystallization conditions without changing the physical and chemical parameters that are critical for crystallization. Seed crystals are grown directly in LCP and, as with conventional rMMS, a seeding experiment is combined with an additive experiment. The new method was used with the bacterial integral membrane protein OmpF, and it was found that it increased the number of crystallization hits by almost an order of magnitude: without microseeding one new hit was found, whereas with LCP-rMMS eight new hits were found. It is anticipated that this new method will lead to better diffracting crystals of membrane proteins. A method of generating seed gradients, which allows the LCP seed stock to be diluted and the number of crystals in each LCP bolus to be reduced, if required for optimization, is also demonstrated.

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