Aquaculture water as a source of sustainable growth medium for diatom cultivation and its nutritive suitability as a potential aqua feed

2021 ◽  
Vol 24 ◽  
pp. 101987
Author(s):  
Raya Bhattacharjya ◽  
Pankaj Kumar Singh ◽  
Archana Tiwari
Author(s):  
Dale E. McClendon ◽  
Paul N. Morgan ◽  
Bernard L. Soloff

It has been observed that minute amounts of venom from the brown recluse spider, Loxosceles reclusa, are capable of producing cytotoxic changes in cultures of certain mammalian cells (Morgan and Felton, 1965). Since there is little available information concerning the effect of venoms on susceptible cells, we have attempted to characterize, at the electron microscope level, the cytotoxic changes produced by the venom of this spider.Cultures of human epithelial carcinoma cells, strain HeLa, were initiated on sterile, carbon coated coverslips contained in Leighton tubes. Each culture was seeded with approximately 1x105 cells contained in 1.5 ml of a modified Eagle's minimum essential growth medium prepared in Hank's balanced salt solution. Cultures were incubated at 36° C. for three days prior to the addition of venom. The venom was collected from female brown recluse spiders and diluted in sterile saline. Protein determinations on the venom-were made according to the spectrophotometric method of Waddell (1956). Approximately 10 μg venom protein per ml of fresh medium was added to each culture after discarding the old growth medium. Control cultures were treated similarly, except that no venom was added. All cultures were reincubated at 36° C.


Author(s):  
L. P. Hardie ◽  
D. L. Balkwill ◽  
S. E. Stevens

Agmenellum quadruplicatum is a unicellular, non-nitrogen-fixing, marine cyanobacterium (blue-green alga). The ultrastructure of this organism, when grown in the laboratory with all necessary nutrients, has been characterized thoroughly. In contrast, little is known of its ultrastructure in the specific nutrient-limiting conditions typical of its natural habitat. Iron is one of the nutrients likely to limit this organism in such natural environments. It is also of great importance metabolically, being required for both photosynthesis and assimilation of nitrate. The purpose of this study was to assess the effects (if any) of iron limitation on the ultrastructure of A. quadruplicatum. It was part of a broader endeavor to elucidate the ultrastructure of cyanobacteria in natural systemsActively growing cells were placed in a growth medium containing 1% of its usual iron. The cultures were then sampled periodically for 10 days and prepared for thin sectioning TEM to assess the effects of iron limitation.


2018 ◽  
Vol 4 (1) ◽  
pp. 57
Author(s):  
Yuli Anwar ◽  
Dahlar .

Abstract. One of the advances in information technology that now has changed the outlook and human life, business process and business strategy of an institution is the internet. The internet is a very large networks that connected to computers and serves throughout the world in one centralized network. With the internet we can access data and information anytime and anywhere.    As one provider of high-speed data communications services and the pioneer of the internet network service provider in Indonesia that provides integrated services, as well as one of the pioneer development of internet services that provide extensive services in the building and apply it throughout Indonesia. Indosat ready to seize opportunities for sustainable growth of business spectrum are still sprawling Indonesia.    Therefore, Indosat continues to focus on the development of increased efforts to provide the best service for customers of Indosat. Indosat will continue to develop and expand network coverage and a larger investment that the company will achieve excellence in the field of integrated telecommunications services.    Ranking by region of the IP Providers can be seen by grouping IP Providers, and management over IP Providers prefer to choose providers based on where it orginates as an example for the region of the U.S if it will be preferred providers that come from U.S. providers.With the commencement of the internet network optimization start early in 2008 with the selection of the appropriate IP Upstream Provider criteria, it is up to date according to data obtained from Indosat, seen any significant changes to the cost of purchasing capacity of the IP Upstream.    Based on the data obtained that until Q3 or September 2008, the number of IP Upstream Providers that previously there were 20 to 10 IP Upstream Provider, IP Transit Price total decrease of 11% to the price of IP Transit Price / Mbps there is a decrease of 78%, while from the capacity bandwith an increase of 301% capacity from 2008.


2019 ◽  
Vol 10 (3) ◽  
pp. 244-257
Author(s):  
İclal Kaya Altay ◽  
◽  
Shqiprim Ahmeti ◽  

The Treaty establishing a Constitution for Europe ads territorial cohesion as Union’s third goal, beside economic and social cohesion and lists it as a shared competence. In the other hand, the Lisbon Strategy aims to turn Europe into the most competitive area of sustainable growth in the world and it is considered that the Territorial cohesion policy should contribute to it. This paper is structured by a descriptive language while deduction method is used. It refers to official documents, strategies, agendas and reports, as well as books, articles and assessments related to topic. This paper covers all of two Territorial Agendas as well as the background of territorial cohesion thinking and setting process of territorial cohesion policy.


2020 ◽  
Vol 8 (3) ◽  
pp. 3-17
Author(s):  
Elena Blagoeva

The impact of the last global economic crisis (2008) on the European economy put a strain on higher education (HE), yet it also pushed the sector towards intensive reforms and improvements. This paper focuses on the “Strategy for the Development of Higher Education in the Republic of Bulgaria 2014-2020”. With a case study methodology, we explore the strategic endeavours of the Bulgarian government to comply with the European directions and to secure sustainable growth for the HE sector. Our research question is ‘How capable is the Bulgarian HE Strategy to overcome the economic and systemic restraints of Bulgarian higher education?’. Because the development of strategies for HE within the EU is highly contextual, a single qualitative case study was chosen as the research approach. HE institutions are not ivory towers, but subjects to a variety of external and internal forces. Within the EU, this is obviated by the fact that Universities obtain their funds from institutions such as governments, students and their families, donors, as well as EU-level programmes. Therefore, to explore how these pressures interact to affect strategic action on national level, the case method is well suited as it enabled us to study the phenomena thoroughly and deeply. The paper suggests the actions proposed within the Strategy have the potential to overcome the delay, the regional isolation and the negative impact of the economic crisis on the country. Nevertheless, the key elements on which the success or failure of this Strategy hinges are the control mechanisms and the approach to implementation. Shortcomings in these two aspects of strategic actions in HE seem to mark the difference between gaining long-term benefits and merely saving face in front of international institutions.


Author(s):  
Nguyen Manh Hung

Trong khoảng 10 - 15 năm gần đây, ở Việt Nam đã nổi lên luận điểm rằng: cải cách thể chế kinh tế ngày càng đóng vai trò quan trọng hơn trong tiến trình đổi mới. Khi các nguồn lực như tài nguyên thiên nhiên, lao động giá rẻ và vốn...đã đến giới hạn thì cải cách thể chế trở thành đòi hỏi tất yếu đối với nền kinh tế. Tuy nhiên, đây cũng là thử thách khó khăn của quá trình phát triển. Trên thế giới, nhiều quốc gia chỉ đạt được một phần mục tiêu của cải cách, thậm chí ở một số quốc gia nỗ lực cải cách thể chế lại đẩy nền kinh tế vào những bất ổn không ngừng.  Tiến trình cải cách thể chế kinh tế sẽ khó thể thành công nếu không đi kèm với nỗ lực thiết lập một nền tảng quản trị quốc gia vững mạnh. Từ khóa Quản trị, thể chế, kinh tế thị trường, cải cách References [1] Acemoglu, Daron and James Robinson (2012). Why Nations Fail: The Origins of Power, Prosperity, and Poverty. Random House[2] Acemoglu, Daron, Simon Johnson and James A. Robinson (2001), “The Colonial Origins of Comparative Development: An Empirical Investigation” The American Economic Review Vol. 91, No. 5 (Dec., 2001)[3] Acemoglu, Daron, Simon Johnson and James Robinson (2005). “Institutions as Fundamental Cause of Long run Growth”, Handbook ofEconomic Growth, Volume IA. Edited by Philippe Aghion and Steven N. Durlauf. 2005 Elsevier B.V[4] Asian Development Bank (1995). Governance: Sound Development Management, October 1995;[5] Diễn đàn kinh tế tư nhân Việt Nam 2016: Cơ hội, thách thức và giải pháp. Hà nội,[6] Heritage Foundation (2017). 2017 Index of Economic Freedom,[7] [http://www.heritage.org/index/ranking][8] International Development Association (1998). Additions to IDA Resources: Twelfth Replenishment (IDA12). 23 December 1998; [9] Kasper, Wolfgang and Manfred E Streit (1999). Institutional Economics: Social Order and Public Policy, Edward Elgar. Tr. 41[10] Kaufmann, Daniel; Aart Kraay, Massimo Mastruzzi (2010), The Worldwide Governance Indicators Methodology and Analytical Issues, the World Bank Policy Research Working Paper 5430, September 2010[11] Nguyễn Quang Thuấn (2017). “Cải thiện nền quản trị quốc gia, tạo môi trường thuận lợi thúc đẩy tăng trưởng kinh tế trong giai đoạn tới”, tham luận tại Diễn đàn Kinh tế Việt Nam 2017: Phát huy nội lực, tăng trưởng bền vững, Ban kinh tế trung ương ngày 27/06/2017[12] North, D.C. (1990), Institutions, Institutional Change and Economic Performance, Cambridge and New York: Cambridge University Press.[13] Osborne, S. P. (2006), “The New Public Governance?” Public Management Review, vol. 8, No. 3, pp. 377-388.[14] UNDP (1997). “Governance for Sustainable Human Development” New York; WB (1994). Governance: The World Bank’s Experience. Washington DC; [15] VCCI & USAID (2015). Báo cáo năng lực cạnh tranh cấp tỉnh năm 2015. Hà Nội: Phòng Thương mại và Công nghiệp Việt Nam và Cơ quan Phát triển Quốc tế Hoa Kỳ [16] Wolfensohn, James D. (1999), Address to the Board of Governors (September 28, 1999), the World Bank[17] WB (1992). World Development Report: Governance and Development, Washington DC. [18] WB (1989). Sub-Saharan Africa: From Crisis to Sustainable Growth, Washington DC[19] WB (2016). Ease of Doing Business 2016. Washington DC [20] http://www.doingbusiness.org/data/exploreeconomies/vietnam[21] WB (1997). World Development Report 1997. Washington DC. [22] WB (2017). Worldwide Governance Indicator, [23] http://info.worldbank.org/governance/wgi/index.aspx#reports[24] World Economic Forum (2016). Global Competitiveness Report 2016-2017, Geneva.


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