Potential of seaweed culture on St Martin's Island, Bangladesh.

2020 ◽  
Author(s):  
Md. Abdus Salam
Keyword(s):  
Coastal Waters ◽  
Chemical Properties ◽  
Surrounding Area ◽  
Alternative Livelihood ◽  
Environmental Friendly ◽  
Physico Chemical ◽  
Women And Children ◽  
The Government ◽  
Export Revenue ◽  
Seaweed Culture

Abstract Seaweeds grow abundantly along the Sundarban coast and St. Martin's Island. Twenty-two kinds of seaweed have been recorded in the coastal waters of Bangladesh, most of them from St. Martin's Island. St. Martin's Island, Ukhia and Teknaf Upazilla and the sheltered coast of the Bay of Bengal and its surrounding area have potential for seaweed culture. Moreover, the physico-chemical properties in the area are also suitable for seaweed culture. Presently, fishermen, women and children on St. Martin's Island are engaged in seaweed collection, drying and selling to middlemen who smuggle it to Burma. The communities benefit little and the Government does not gain revenue from these activities. Seaweed culture could provide an alternative livelihood for poor fishermen and help to develop seaweed business, which would increase export revenue for the Government. Furthermore, the environment and biodiversity would be safeguarded, as seaweed culture is environmental friendly.

scholarly journals Boating- and Shipping-Related Environmental Impacts and Example Management Measures: A Review

2020 ◽  
Vol 8 (11) ◽  
pp. 908
Author(s):  
Troy A. Byrnes ◽  
Ryan J. K. Dunn
Keyword(s):  
Environmental Impacts ◽  
Full Range ◽  
Chemical Properties ◽  
Positive Outcomes ◽  
Antifouling Paints ◽  
Management Measures ◽  
Physico Chemical ◽  
Pros And Cons ◽  
The Government ◽  
Physical Changes

Boating and shipping operations, their associated activities and supporting infrastructure present a potential for environmental impacts. Such impacts include physical changes to bottom substrate and habitats from sources such as anchoring and mooring and vessel groundings, alterations to the physico-chemical properties of the water column and aquatic biota through the application of antifouling paints, operational and accidental discharges (ballast and bilge water, hydrocarbons, garbage and sewage), fauna collisions, and various other disturbances. Various measures exist to sustainably manage these impacts. In addition to a review of associated boating- and shipping-related environmental impacts, this paper provides an outline of the government- and industry-related measures relevant to achieving positive outcomes in an Australian context. Historically, direct regulations have been used to cover various environmental impacts associated with commercial, industrial, and recreational boating and shipping operations (e.g., MARPOL). The effectiveness of this approach is the degree to which compliance can be effectively monitored and enforced. To be effective, environmental managers require a comprehensive understanding of the full range of instruments available, and the respective roles they play in helping achieve positive environmental outcomes, including the pros and cons of the various regulatory alternatives.

scholarly journals CHEMICAL PROPERTIES IN THE CONSERVATION AREAS OF GILIMANUK BAY, WEST COAST OF BALI

2008 ◽  
Vol 33 (1) ◽  
pp. 41-48
Author(s):  
Muswerry Muchtar
Keyword(s):  
Surface Water ◽  
Dissolved Oxygen ◽  
West Coast ◽  
Coastal Waters ◽  
Chemical Properties ◽  
Nutrient Concentrations ◽  
Chemical Parameters ◽  
Surrounding Area ◽  
Conservation Areas ◽  
Phosphate Nitrate

The study on chemical properties in the conservation areas of Gilimanuk Bay, west coast of Bali was carried out in March 2006. The dissolved oxygen and degree of acidity (pH) in surface water were analyzed. The nutrients, consisting of phosphate, nitrate and ammonia concentrations in water were analyzed as well. In general all the chemical parameters were normal for coastal waters. Dissolved oxygen in this area was lower than those in Jakarta Bay and Panimbang waters, while the nutrient concentrations were lower compared to those of Cisadane Estuary, but higher compared to those of Mamberamo Waters. The fluctuations of pH, dissolved oxygen and other nutrients were influenced by the condition of surrounding area.

scholarly journals Characterization of Leachate from Municipal Open Solid Waste in Makurdi, Benue State, Nigeria

2020 ◽  
pp. 18-27
Author(s):  
D. Nanev, James ◽  
S. Eneji, Ishaq ◽  
A. Wuana, Raymond ◽  
S. Eneji, Ishaq ◽  
U. Itodo, Anthony
Keyword(s):  
Municipal Solid Waste ◽  
Solid Waste ◽  
Health Hazard ◽  
Chemical Properties ◽  
Toxic Metal ◽  
High Concentration ◽  
Volatile Solids ◽  
Physico Chemical ◽  
The Government ◽  
Inorganic Constituents

The increase in the growth of population and urbanization in most state capitals has resulted in generation of large volumes of solid waste. Municipal solid waste is generated daily with an average of 0.5-1.5 Kg/daily per household. Municipal solid waste has become a health hazard in Nigeria, which is yet to be tackled properly by the government and local authority. The methods used for the analysis of leachate samples were adopted from American public health association (APHA, 2012). This study characterizes the physico-chemical properties of leachate from municipal open solid waste in Makurdi, Benue state, Nigeria. The results showed that the colour and smell were light brown and malodourous respectively while the mean pH, temperature, Total solids, Total volatile solids, Suspended solids, Total dissolved solids, COD, BOD5, BOD5/COD ratio, Pb, Ni, Co, Cr and Cd were 7.79±0.02, 35.28, 5993.0±33.0 mg/L, 228.0±8.5 mg/L, 887.0±6.5 mg/L, 12168.0±22.1 mg/L, 868.00±0.12 mg O2/L, 373.000±0.002 mg O2/L, 0.46, 0.461.000±0.0010, 0.0845.000±0.0004, 0.2045.000±0.0009, 0.5211.000±0.0011 and 0.1565.000±0.0010 respectively. The leachate sample contain high concentration of organic and inorganic constituents including toxic metal content higher than the NESREA standards limit for drinking water.

Distribution of intertidal isopods in relation to geographical changes in macroalgal cover in the Bay of Biscay

1990 ◽  
Vol 70 (2) ◽  
pp. 283-293 ◽  
Author(s):  
Julio Arrontes ◽  
Ricardo Anadón
Keyword(s):  
Coastal Waters ◽  
Sea Water ◽  
Algal Species ◽  
Outer Part ◽  
Chemical Properties ◽  
Bay Of Biscay ◽  
Physico Chemical ◽  
Eastern Zone ◽  
Western Zone ◽  
Laminaria Ochroleuca

The distribution of intertidal isopods with respect to algal species was investigated over a range of 250 km on the shores of north Spain. A survey of 25 localities included three zones with a distinct composition of algal species: a western zone comprising shores facing Atlantic waters and the outer part of the Bay of Biscay; a narrow transition zone (about 70 km in length); and an eastern zone extending to the inner part of the Bay of Biscay. Thirty two isopod species were collected, 11 of which were present in high densities. Response to geographical change was observed to occur clearly in three species, Ischyromene lacazei, Idotea pelagica and I. baltica, and to a lesser degree in I. granulosa; the former two and the latter two were abundant in the eastern and western zones respectively. All four species were found to be closely associated with macroalgae species which display geographical changes in abundance (e.g. Laminaria ochroleuca and Comllina elongata). In addition, Idotea species were found to inhabit a reduced number of algal species compared with other European shores. Spanish shore of the Bay of Biscay probably constitutes the geographic limit of the distribution of the four species. A sampling artefact might also be responsible to some extent for the patterns of distribution observed. Differences in the physico-chemical properties of sea water along the coast and circulation of coastal waters are not thought to influence the distribution of isopods.

scholarly journals An Empirical Survey on Damages Caused by Erosional Depositions on Farmlands along Jimeta-Yola Road, Adamawa State Nigeria

2020 ◽  
pp. 43-54
Author(s):  
A. A. Sadiq ◽  
Maryam Abdullahi ◽  
Abubakar Bello
Keyword(s):  
Soil Health ◽  
Organic Matter Content ◽  
Chemical Properties ◽  
Matter Content ◽  
Average Depth ◽  
Empirical Survey ◽  
Physico Chemical ◽  
The Government ◽  
June July ◽  
On Farm

Aim: To empirically survey the damages caused by erosional deposition on farmlands along Jimeta-Yola road, Adamawa state Nigeria. Place and Duration of Study: It was conducted in June-July 2020 rainy season due to the unprecedented depositions on three farmlands (Abattoir, Garage and Yola Bridge) in the area. Methodology: Data was obtained in three phases which include on-farm interviews and questionnaires, direct measurement of depositions using simple bathymetric method and collection of three representative soil samples from the profiles for determination of some physico-chemical properties. Results: The result indicated that rice was major crop grown in the area for about 30 years with an average yield ranges from 2000-8000 kg (20-80 bags). The number of farmlands damaged was 11 with total of 22 acres, at Abattoir, 5 farmlands at Garage having a total of 15 acres and 7 farmlands were also damaged with about 10 acres respectively. Fine sandy soil was deposited to an average depth of 55 cm with an estimated volume of 48.96 m3 at Abattoir area, debris and clay loam was deposited to an average of 20 cm at Garage having an estimated of 12.14 m3 and at Yola Bridge farm location about 4.24 m3 volume of loamy soils were also deposited to an average depth of 10 cm. The depositional soils have pH values ranges from 5.23-6.23, organic matter content of 0.43-2.33%, water holding capacity 35-55%  with rapid to moderate permeability. Conclusion: To combat the damaged imposed by soil erosions on farmlands in the area both preventive and conservative measures should adopted by the government and the farmers with the aim of restoring and sustaining the good soil health that will support food production for growing population.

Decoration of specific sites on freeze-fractured membranes

1978 ◽  
Vol 36 (2) ◽  
pp. 140-141
Author(s):  
H. Gross ◽  
H. Moor
Keyword(s):  
Pure Water ◽  
Freeze Fracture ◽  
Chemical Properties ◽  
Surface Forces ◽  
Sulfate Pentahydrate ◽  
Copper Sulfate Pentahydrate ◽  
Physico Chemical ◽  
Water Of Hydration ◽  
Small Container ◽  
Binding Forces

Fracturing under ultrahigh vacuum (UHV, p ≤ 10-9 Torr) produces membrane fracture faces devoid of contamination. Such clean surfaces are a prerequisite foe studies of interactions between condensing molecules is possible and surface forces are unequally distributed, the condensate will accumulate at places with high binding forces; crystallites will arise which may be useful a probes for surface sites with specific physico-chemical properties. Specific “decoration” with crystallites can be achieved nby exposing membrane fracture faces to water vopour. A device was developed which enables the production of pure water vapour and the controlled variation of its partial pressure in an UHV freeze-fracture apparatus (Fig.1a). Under vaccum (≤ 10-3 Torr), small container filled with copper-sulfate-pentahydrate is heated with a heating coil, with the temperature controlled by means of a thermocouple. The water of hydration thereby released enters a storage vessel.

Physico-Chemical Properties of Recombinant Desulphatohirudin

1990 ◽  
Vol 63 (03) ◽  
pp. 499-504 ◽  
Author(s):  
A Electricwala ◽  
L Irons ◽  
R Wait ◽  
R J G Carr ◽  
R J Ling ◽  
...  
Keyword(s):  
Molecular Weight ◽  
Gel Filtration ◽  
Chemical Properties ◽  
Alpha Helix ◽  
Apparent Molecular Weight ◽  
Correlation Spectroscopy ◽  
Nmr Studies ◽  
Recombinant Hirudin ◽  
Physico Chemical ◽  
Recombinant Molecule

SummaryPhysico-chemical properties of recombinant desulphatohirudin expressed in yeast (CIBA GEIGY code No. CGP 39393) were reinvestigated. As previously reported for natural hirudin, the recombinant molecule exhibited abnormal behaviour by gel filtration with an apparent molecular weight greater than that based on the primary structure. However, molecular weight estimation by SDS gel electrophoresis, FAB-mass spectrometry and Photon Correlation Spectroscopy were in agreement with the theoretical molecular weight, with little suggestion of dimer or aggregate formation. Circular dichroism studies of the recombinant molecule show similar spectra at different pH values but are markedly different from that reported by Konno et al. (13) for a natural hirudin-variant. Our CD studies indicate the presence of about 60% beta sheet and the absence of alpha helix in the secondary structure of recombinant hirudin, in agreement with the conformation determined by NMR studies (17)

Physico-chemical properties of the rare-earth metals, scandium, and yttrium

1963 ◽  
Vol 79 (2) ◽  
pp. 263-293 ◽  
Author(s):  
E.M. Savitskii ◽  
V.F. Terekhova ◽  
O.P. Naumkin
Keyword(s):  
Rare Earth ◽  
Rare Earth Metals ◽  
Chemical Properties ◽  
Physico Chemical ◽  
The Rare Earth

Physico chemical properties and gas adsorption separation characteristics of Itaya zeolite and its modified products.

1990 ◽  
Vol 39 (442) ◽  
pp. 996-1000 ◽  
Author(s):  
Ayao TAKASAKA ◽  
Hideyuki NEMOTO ◽  
Hirohiko KONO ◽  
Yoshihiro MATSUDA
Keyword(s):  
Gas Adsorption ◽  
Chemical Properties ◽  
Physico Chemical
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