Evaluation of the Role of Nutrition in Lobster Recruitment

1986 ◽  
Vol 43 (11) ◽  
pp. 2320-2327 ◽  
Author(s):  
J. D. Castell ◽  
J. C. Kean
Keyword(s):  
Amino Acids ◽  
Essential Amino Acids ◽  
Field Application ◽  
Nutritional Requirements ◽  
Egg Viability ◽  
Good Opportunity ◽  
Broodstock Nutrition

Many of the hypotheses and proposals presented here on the role of nutrition in lobster recruitment have been derived from research on other aquatic animals. Little research has focused on the determination of nutritional requirements of lobsters and even that has been primarily with small juveniles (36–1000 mg). Despite the tacit acknowledgement that maternal fecundity and egg viability are a function of quantity and quality of available food, little is known about the nutrition of reproductively mature lobsters. The importance of broodstock nutrition and possible methods for evaluating nutritional status are discussed. Information on protein, essential amino acids, vitamins, minerals, carbohydrates, and lipids is summarized. Additionally, some proposals for field application of nutritional response criteria used in the laboratory are discussed. Though research on larvae adult broodstock nutrition, effects of environmental factors (e.g. temperature, salinity, photoperiod, etc.), as well as many other aspects of nutrition is yet to be done, there is "good opportunity" for nutrition to be a significant part of the current lobster recruitment research program.

scholarly journals Determination of Essential Amino Acids Involved in the CD4-Independent Tropism of the X4 Human Immunodeficiency Virus Type 1 m7NDK Isolate: Role of Potential N Glycosylations in the C2 and V3 Regions of gp120

2001 ◽  
Vol 75 (11) ◽  
pp. 5425-5428 ◽  
Author(s):  
Julie Dumonceaux ◽  
Caroline Goujon ◽  
Veronique Joliot ◽  
Pascale Briand ◽  
Uriel Hazan
Keyword(s):  
Amino Acids ◽  
Human Immunodeficiency Virus ◽  
Human Immunodeficiency Virus Type ◽  
Virus Type ◽  
Essential Amino Acids ◽  
Site Directed Mutagenesis ◽  
Immunodeficiency Virus

ABSTRACT Seven mutations in the C2, V3, and C3 regions of gp120 are implicated in the tropism of the first CD4-independent human immunodeficiency virus type 1 isolate, m7NDK. Site-directed mutagenesis revealed that three amino acids are essential to maintain this tropism, one in the C2 region and two in the V3 loop. Two mutations implied N glycosylation modifications.

scholarly journals Comparative Analysis of Minerals, Heavy Metals and Amino Acids Compositions of the Seeds and Juice of Cucumis metuliferus

2020 ◽  
pp. 31-42
Author(s):  
Onuabuchi Nnenna Ani ◽  
Cosmas Ezekaibeya Achikanu ◽  
Chukwuebuka Kenechukwu Onyishi
Keyword(s):  
Heavy Metals ◽  
Amino Acids ◽  
Amino Acid ◽  
High Performance ◽  
Protein Quality ◽  
Amino Acid Content ◽  
Essential Amino Acids ◽  
Food Supplement

The aim of this study was to compare the minerals, heavy metals and amino acids compositions of the seeds and juice of Cucumis metuliferus. The minerals and heavy metals content were evaluated using FS240AA agilent atomic absorption spectrometer according to the method of American Public Health Association while the amino acids content was evaluated using High Performance Liquid Chromatography (HPLC). From the mineral analysis, concentrations of calcium (23.416 ppm), aluminum (0.094 ppm), manganese (0.242 ppm) and iron (1.243 ppm) were higher in the juice than in the seeds with respective values of 20.084 ppm, 0.079 ppm, 0.221 ppm and 0.934 ppm while the concentrations of magnesium (29.749 ppm), zinc (4.184 ppm), copper (0.125 ppm), sodium (8.927 ppm) and potassium (7.594 ppm) were higher in the seeds than in the juice with respective values of 20.592 ppm, 1.271 ppm, 0.030 ppm, 8.594 ppm and 6.833 ppm. The juice had higher concentrations of heavy metals such as arsenic (20.082 ppm), lead (4.135 ppm), cobalt (0.178 ppm), silver (0.074 ppm), selenium (7.246 ppm) and mercury (4.609 ppm) as against the seed with respective values of 0.578 ppm, 1.455 ppm while cobalt, silver, selenium and mercury were not detected. However, the concentrations of cadmium (0.389 ppm), chromium (0.545 ppm) and nickel (0.288 ppm) were higher in the seeds than in the juice with respective values of 0.082 ppm, 0.252 ppm and 0.016 ppm. From the result of amino acid analysis, 18 amino acids were found in both the seeds and juice which include 9 essential and 9 non-essential amino acids respectively. The qualitative composition of amino acids in both the seeds and the juice was same, but the quantitative contents differed although non-significantly from each other with prevalence of amino acids in the seeds. Aspartate was the most abundant of the amino acids found while cysteine was the least.  These results suggest that the seeds and juice of Cucumis metuliferus contain adequate essential minerals which are beneficial to human health. The contaminant levels of heavy metals highlights the necessity on the quality and safety concerns about their use and handling. The amino acids analysis showed that both the seeds and juice of Cucumis metuliferus are good sources of amino acid and could be used as food supplement. The amino acid content may also provide useful information for determination of the protein quality of Cucumis metuliferus.

scholarly journals Effects of Management, Dietary Intake, and Genotype on Rumen Morphology, Fermentation, and Microbiota, and on Meat Quality in Yaks and Cattle

2021 ◽  
Vol 8 ◽  
Author(s):  
Changsheng Hu ◽  
Luming Ding ◽  
Cuixia Jiang ◽  
Chengfang Ma ◽  
Botao Liu ◽  
...  
Keyword(s):  
Amino Acids ◽  
Meat Quality ◽  
Volatile Fatty Acids ◽  
Essential Amino Acids ◽  
Healthy Food ◽  
Who Criteria ◽  
Natural Pasture ◽  
Natural Grassland

Traditionally, yaks graze only natural grassland, even in harsh winters. Meat from grazing yaks is considered very healthy; however, feedlot fattening, which includes concentrate, has been introduced. We questioned whether this change in management and diet would have an impact on the rumen and meat quality of yaks. This study examined the morphology, fermentation, and microbiota of the rumen and the quality of meat of three groups of bovines: (1) grazing yaks (GYs, 4-year olds), without dietary supplements; (2) yaks (FYs, 2.5-year olds) feedlot-fattened for 5 months after grazing natural pasture; and (3) feedlot-fattened cattle (FC, Simmental, 2-year olds). This design allowed us to determine the role of diet (with and without concentrate) and genotype (yaks vs. cattle) on variables measured. Ruminal papillae surface area was greater in the FYs than in the GYs (P = 0.02), and ruminal microbial diversity was greater but richness was lesser in the GYs than in the FC and FYs. Concentrations of ruminal volatile fatty acids were greater in the yaks than in the cattle. In addition, both yak groups had higher protein and lower fat contents in meat than the FC. Meat of GY had a lower n6:n3 ratio than FY and FC, and was the only group with a ratio below r, which is recommended for healthy food. Essential amino acids (EAA), as a proportion of total AA and of non-essential AA of yak meat, met WHO criteria for healthy food; whereas FC did not.

Urban Wastewater Discharge and Bacteriological Quality of Receiving Coastal Waters: Processes and Modelling

1993 ◽  
Vol 27 (12) ◽  
pp. 223-226
Author(s):  
J.-F. Guillaud ◽  
M. Pommepuy ◽  
E. Dupray ◽  
J.-C. Salomon ◽  
B. Thouvenin
Keyword(s):  
Coastal Zone ◽  
Coastal Waters ◽  
Wastewater Treatment Plants ◽  
Enteric Bacteria ◽  
Wastewater Discharge ◽  
Urban Wastewater ◽  
Bacteria Transport

The aim of this paper is to present some results of bacterial studies which were developed by IFREMER in coastal discharge areas of urban wastewaters; they are focused on the determination of bacterial inputs by wastewater treatment plants, the role of environmental factors on the enteric bacteria survival in the coastal zone, and the modelling of bacteria transport and disappearance in order to provide useful management information for minimizing faecal pollution in the coastal zone.

Communication in social networks of St. Petersburg as a means of adaptation of ethnocultural communities

Litera ◽  
2021 ◽  
pp. 38-55
Author(s):  
Rivaa Mukhammad Salem Alsalibi
Keyword(s):  
Social Networks ◽  
Social Media ◽  
Ethnic Communities ◽  
Sense Of Security ◽  
The Social ◽  
The Subject ◽  
Development Prospects

The subject of this research is the specifics, forms and functions of interaction in social media groups between the representatives of ethnic communities. The goal consists in determination of the role of social networks in adaptation of ethnocultural communities of St. Petersburg. The research is based on the polling technique for acquisition of information on the cognitive, emotional, and behavioral state of a person. The survey was conducted via distribution of questionnaires among the representatives of ethnic groups. The article also employs the method of systematic scientific observation over the social media groups, topic raised therein, as well as reading and analysis of the comments. The scientific novelty of this work consists in outlining of the nature, trends and development prospects of cross-cultural communications as the channel for ethnocultural interaction.  The main conclusions, which touch upon users from various ethnic communities who do not have enough experience in organization of activity of social media groups, demonstrate that it causes the loss of the sense of security, accumulation of prejudices and escalation of interethnic conflicts, as well as preference of the with restricted access, which contributes to lock down of the group and impedes adaptation in the accepting society. Stabilization of situation can be achieved by improvement of the quality of content posted in the social media, as well as level of their administration.

scholarly journals Comparative Study on Quality Parameters of Royal Jelly, Apilarnil and Queen Bee Larvae Triturate

2017 ◽  
Vol 74 (1) ◽  
pp. 51
Author(s):  
Rodica MARGAOAN ◽  
Liviu Alexandru MARGHITAS ◽  
Daniel Severus DEZMIREAN ◽  
Otilia BOBIS ◽  
Victorita BONTA ◽  
...  
Keyword(s):  
Amino Acids ◽  
Royal Jelly ◽  
Essential Amino Acids ◽  
Quality Parameters ◽  
Total Protein Content ◽  
Beneficial Effects ◽  
Long Time ◽  
Soxhlet Method ◽  
Kjeldahl Method

Given their beneficial effects in terms of health, the natural products, especially beehive products, have drawn the attention of consumers since long time ago. In order to guarantee the quality of these products on the market, their chemical composition needs to be analyzed. Thus, this current research had as objective the establishment of quality parameters for beehive brood food derived products: apilarnil and queen bee larvae triturate. These two products were compared with royal jelly which is the basis of brood food in the first 3 days of larval stage. The carbohydrates were determined by HPLC-IR and allowed the identification of seven carbohydrate compounds, predominantly glucose, fructose and sucrose. The lipid profile was analyzed by the Soxhlet method. The total protein content was determined by the Kjeldahl method. Free amino acids were analyzed by LC-MS. A total of 31 amino acids were identified of which nine are essential amino acids for humans. 

scholarly journals Increase of nutrients export and production of pitaya whit potassium fertilization

2020 ◽  
Vol 11 ◽  
pp. e3276
Author(s):  
Josimara Mendes Rabelo ◽  
Maria do Céu Monteiro Cruz ◽  
Nubia Cassiana Santos ◽  
Deilson de Almeida Alves ◽  
João Esdras Lima ◽  
...  
Keyword(s):  
Dry Matter ◽  
Nutritional Requirements ◽  
Nutrient Export ◽  
Plant Nutrient ◽  
High Productivity ◽  
Potassium Fertilization ◽  
Hylocereus Undatus ◽  
Hylocereus Polyrhizus

Characterization works of pitayas show that the potassium (K) is the nutrient most exported, thus, influences in the productivity and quality of this fruit. However, these researches do not report the nutrients export by pitaya's associating the fertilization carried out in the orchard, information that is relevant to make the nutrients reposition adequate at the time of fertilization. The research was carried out to evaluate the supply of K2O in the export of nutrients and productivity of the Hylocereus undatus and Hylocereus polyrhizus pitaya species. The analysis was carried out in the mature fruits harvested in two harvests. Potassium fertilization was performed at doses of 0; 50; 100 and 200 g of K2O per plant. Nutrient export per ton of fruit was calculated from the determination of the nutrient levels and the dry matter of the pitaya pulp. The export of nutrients by the pitaya of the species H. undatus and H. polyrhizus occurs in the following order: K>N>P>Ca>Mg> and Mn>Fe>Cu>Zn>B. These species of pitaya have similar nutritional requirements, enabling them to be receive same fertilization management. The amount of nutrients exported was higher in plants fertilized with potassium due to the higher productivity achieved. Orchards of pitaya that reach high productivity require a greater quantity of nutrients, due to the increase export by the fruits.

scholarly journals Multivariate modeling strategies to predict nutritional requirements of essential amino acids in semiheavy second-cycle hens

2021 ◽  
Vol 50 ◽  
Author(s):  
Walter Morales-Suárez ◽  
Iván Camilo Ospina-Rojas ◽  
Jonh Jairo Méndez-Arteaga ◽  
Adriana Helena do Nascimento Ferreira ◽  
Henry Alexander Váquiro-Herrera
Keyword(s):  
Amino Acids ◽  
Essential Amino Acids ◽  
Nutritional Requirements ◽  
Multivariate Modeling

scholarly journals Research Regarding Dynamics of Chemical Content from Pasteurized Egg Melange Stored in Polyethylene Type Packings

2017 ◽  
Vol 54 (2) ◽  
pp. 368-374
Author(s):  
Roxana Nicoleta Ratu ◽  
Marius Giorgi Usturoi ◽  
Daniel Simeanu ◽  
Cristina Simeanu ◽  
Alexandru Usturoi ◽  
...  
Keyword(s):  
Amino Acids ◽  
Fatty Acids ◽  
Unsaturated Fatty Acids ◽  
Saturated Fatty Acids ◽  
Storage Period ◽  
Essential Amino Acids ◽  
Storage Conditions ◽  
Mean Values ◽  
Chemical Content

n the current paper, we aimed to analyze the way in which packing (different polyethylene types) influence the quality of pasteurized melange during storage, packing being realized in units of 1 kg (Tetra Pak) (batch Lexp-1) and units of 5 kg (Bag in box) (batch Lexp-2). Products were stored during a period of 28 days at a temperature of +4�C, qualitative determinations being realized in first day (day 0), at 7 days, at 14 days, 21 days and in day 28 of storage. Were effectuated a sensorial examination and chemical analysis were was established the content in dry matter (%), water (%), proteins (%), content in essential amino acids (isoleucine, methionine, tryptophan, phenylalanine) and non-essential amino acids (alanine, histidine, glycine, serine) (mg/100g) as well as the content in lipids (%) establishing their profile by identification of some saturated fatty acids (16:0 mg/100g and 18:0 mg/100g) and unsaturated fatty acids (16:1 mg/100g and 18:1 mg/100g). After sensorial examinations, the first modifications were observed at the checking effectuated in day 21 for batch Lexp-2, the obtained score being of 18 points, and at checking effectuated in day 28 was given a score of 18 points for melange belonging to batch Lexp-1 and only 14 points for melange from batch Lexp-2. Differences were recorded also in case of chemical composition of products, so for protein content at batch Lexp-1 in first checking day was obtained a mean of 12.730�0.24% and at batch Lexp-2 12.614�0.22%. Differences between those two batches were insignificant (p[0.05). In case of fat content, at the end of storage period was obtained a mean of 11.256�0.06% for batch Lexp-1 and 11.244�0.11% for batch Lexp-2, differences being insignificant (p [ 0.05). Regarding the profile of amino acids and fatty acids, the mean values obtained during whole storage period oscillated from one stage to another, but the differences between those two batches were insignificant (p [ 0.05). Pasteurized egg melange suffers certain sensorial modifications during storage, especially on consistency and colouring, modifications which are accentuated mainly by storage conditions. Type of polyethylene utilized for this product hadn�t influenced the nutritive qualities of product.

scholarly journals Why do we have to use new low flux dialysis machine for daily home dialysis

2018 ◽  
Vol 1 (2) ◽  
pp. 71-74
Author(s):  
Hafedh Fessi
Keyword(s):  
Recovery Time ◽  
Western Europe ◽  
Ultrafiltration Rate ◽  
Dialysis Dose ◽  
Good Opportunity ◽  
Home Dialysis ◽  
Session Management ◽  
The Us

After a decline at the end of 90’s, Home Hemodialysis recently found a second breath. This renewal doesn’t only concern France, but also the US and Western Europe (GB, Italy and Spain).Several studies confirm that low flux dialysat machines deliver adequate dialysis dose, based on high dialysat saturation and low daily ultrafiltration rate. Frequent sessions avoid long interdialytic interval. They also are easy to use, allow easier session management with more flexibility and mobility.Daily hemodialysis with low dialysat flux responds to new goals: improving quality of life reaching better cardiovascular parameters and reduce recovery time post dialysis.Better patient adhesion to the treatment with low flux dialysat machines allows a decrease in barriers to home memodialysis development.It gives a good opportunity today to improve dialysis quality. The role of patient care partner is determinant

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