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  • Articles  (19)
  • Biology
  • Ertrag
  • Inorganic Chemistry
  • LUNAR AND PLANETARY EXPLORATION
  • 2015-2019  (19)
  • 1930-1934
  • 1925-1929
  • 2017  (8)
  • 2016  (11)
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  • Articles  (19)
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Keywords
Publisher
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  • 2015-2019  (19)
  • 1930-1934
  • 1925-1929
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Journal
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  • 1
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    [Editors' Choice] Fluorine frolicking with eight friends (2017)
    American Association for the Advancement of Science (AAAS)
    In: Science
    Details
    Publication Date: 2017-02-10
    Description: Author: Jake Yeston
    Keywords: Inorganic Chemistry
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Geosciences , Computer Science , Medicine , Natural Sciences in General , Physics
    Published by American Association for the Advancement of Science (AAAS)
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  • 2
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    [This Week in Science] A salty route to an all-nitrogen ring (2017)
    American Association for the Advancement of Science (AAAS)
    In: Science
    Details
    Publication Date: 2017-01-27
    Description: Author: Jake Yeston
    Keywords: Inorganic Chemistry
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Geosciences , Computer Science , Medicine , Natural Sciences in General , Physics
    Published by American Association for the Advancement of Science (AAAS)
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  • 3
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    [Book Review] Born this way? (2017)
    American Association for the Advancement of Science (AAAS)
    In: Science
    Details
    Publication Date: 2017-01-20
    Description: How and why do the sexes differ? And why do we care? Few questions generate as much controversy and debatein both scientific and public arenas. In her book Testosterone Rex: Myths of Sex, Science, and Society, Cordelia Fine tackles the question from the perspective that has generated the most discussion: biological contributions to sex differences. Author: Sheri Berenbaum
    Keywords: Biology
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Geosciences , Computer Science , Medicine , Natural Sciences in General , Physics
    Published by American Association for the Advancement of Science (AAAS)
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  • 4
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    [Perspective] Polynitrogen chemistry enters the ring (2017)
    American Association for the Advancement of Science (AAAS)
    In: Science
    Details
    Publication Date: 2017-01-27
    Description: Polynitrogens have the potential for ultrahigh-performing explosives or propellants because singly or doubly bonded polynitrogens can decompose to triply bonded dinitrogen (N2) with an extraordinarily large energy release. The large energy content and relatively low activation energy toward decomposition makes the synthesis of a stable polynitrogen allotrope an extraordinary challenge. Many elements exist in different forms (allotropes)—for example, carbon can exist as graphite, diamond, buckyballs, or graphene. However, no stable neutral allotropes are known for nitrogen, and only two stable homonuclear polynitrogen ions had been isolated until now—namely, the N3− anion (1) and the N5+ cation (2). On page 374 of this issue, Zhang et al. (3) report the synthesis and characterization of the first stable salt of the cyclo-N5− anion, only the third stable homonuclear polynitrogen ion ever isolated. Author: Karl O. Christe
    Keywords: Inorganic Chemistry
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Geosciences , Computer Science , Medicine , Natural Sciences in General , Physics
    Published by American Association for the Advancement of Science (AAAS)
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  • 5
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    Age structure and growth rate of (Squalius cephalus Linnaeus, 1758) in Tuji tributary from Talar River, Mazandaran Province (2017)
    Details
    Publication Date: 2021-05-19
    Description: A structure and growth pattern of Squalius cephalus (Linnaeus, 1758) in Tuji tributary of Talar River, Mazandaran Province, was studied during the period from August 2008 till August 2009. In total, 298 fish were caught by electrofishing and fixed in 10% formalin. The weight and length of fish were measured and the age was determinated by scallometric method. The age data showed that fishes were between 0+ to 4+ age groups. Pauli`s applied growth pattern showed a positive alometric for male and female and total fish and a negative isometric for unmature fishes. The average instantaneous growth rate of European Chub showed that the age groups 2+ and 3+ with 1.1 had the fastest growth compare to 3+ and 4+ age groups with 0.89. Condition factor of specimens showed that the highest one with 1.58 (r2 = 0.983) belong to females and the lowest with 1.17 (r2 = 0.901) belong to unmature fishes. The total sex ratio (123 males to 115 females) showed no significant differences between them.
    Description: Published
    Keywords: Squalius cephalus Linnaeus ; Tuji tributary ; Age ; Structure ; Growth ; Biology ; Fish ; Freshwater
    Repository Name: AquaDocs
    Type: Journal Contribution , Refereed
    Format: pp.107-118
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  • 6
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    Diet composition, Trophic level estimation and Food consumption rate of Saurida tumbil (Teleostomi/Synodontidae) in the Bushehr coastal waters, Persian Gulf, Iran (2017)
    Details
    Publication Date: 2021-05-19
    Description: In order To increase the knowledge of Saurida tumbil biology and ecology, an investigation of food habits of this species was conducted from October 2010 to September 2011 in Bushehr coastal waters, Persian Gulf. 485 fish stomach contents were studied. In this study the frequency of occurrence of prey, feeding intensity index, the index is empty stomachs, the mean Trophic levels and the rate of food consumption was calculated. Total three major taxonomic categories were identified in the stomach contents of this species and were weighted including arthropods (crustaceans higher crustaceans), mollusks (Cephalopod) and Teleostei and the results show that Teleostei was the most abundant prey item which including the family Carangidae, Nemipteridae, Synodontidae, Mullidae, Sphyraenidae, Leiognathidae , Haemulinae and Trichiuridae. The results showed that the highest intensity of feeding occurs in the fall and lowest in summer. S. tumbil also shows cannibalistic behavior in ecosystem. The mean trophic level for S. tumbil was estimated 4.64 for the first time in Persian Gulf, indicating that S.tumbil is largely carnivore and has a high rate of food consumption.
    Description: Published
    Keywords: Saurida tumbil ; Consumption ; Diet ; Composition ; Level ; Food ; Biology ; Ecology
    Repository Name: AquaDocs
    Type: Journal Contribution , Refereed
    Format: PP.139-150
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  • 7
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    A comparative study on some biological parameters in broodstock and juvenile kutum, Rutilus kutum in the southern Caspian Sea basin (2017)
    Details
    Publication Date: 2021-05-19
    Description: Some biological characteristics of broodstock and juvenile kutum, Rutilus kutum. were investigated using data collected from the estuaries of Tajen and Shirood Rivers (TR and SR) (south Caspian Sea basin) as well as from the Caspian Sea in 2012. The results showed higher condition factors (CF) in the male broodstocks than those estimated in the female broodstock of both TR and SR. The female juveniles displayed a greater level of CF. The Von Bertalanffy's growth equations were calculated as: Lt = 40.67(1 – e−2.27(t−18.84)) and Lt = 50.11(1 – e−0.48(t+1.814)) for the broodstocks of SR and TR, respectively, and for the juveniles as: [Lt = 48.36 (1 – e−0.537 (t+ 0.913]. The males of SR presented a negative allometric growth pattern. The females and males of both SR and TR presented similar isometric growth patterns. Both male and female juveniles from TR exhibited a positive allometric growth pattern. The calculated equations for total length and weight were as: W = 3E−06 L3.2069 and W = 5E−07 L3.4745 for the male broodstock of SR and TR, respectively, and as: W = 5E−07 L3.4745 for the juveniles. The measured parameters may reflect the role of fish habitat characteristics such as food availability, population density, and age classes depending on sex and season.
    Description: Published
    Keywords: Rutilus kutum ; kutum Rutilus kutum ; Comparative ; Biological ; Parameters ; Juvenile ; Biology
    Repository Name: AquaDocs
    Type: Journal Contribution , Refereed
    Format: pp.205-213
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  • 8
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    Reproductive biology of Mossul bleak (Alburnus mossulensis) in BibiSayyedan River of Tigris basin in Iran (2017)
    Details
    Publication Date: 2021-05-19
    Description: Reproductive characteristics of Mossul bleak, Alburnus mossulensis, a native species of Cyprinidae family in Bibi-Sayyedan River of Semirom, Isfahan, were investigated by monthly sampling during December 2010 to December 2011. Five hundred and fourty three specimens (256 females, 159 males and 31 immature) were caught by a sein net (5 mm mesh size). The collected sampeles were anesthesized in 1% clove oil solution and transported to the laboratory on ice and subjected to dissection and biometric measurments. Age of males and females ranged from 0+ to 5+ years. The sex ratio was 1M: 2.2F (p 〈 0.05). The females outnumbered the males in all age classes. The largest female was 16.8cm in total length and 49.12g in weight and the largest male was 14.1cm in total length and 28.19g in weight. The age and total length at first maturity of females and males were estimated as 1 year and 5.3cm total length, and 2 years and 4.4cm, respectively. The minimum, maximum, and avarge absolute fecundity were 2064, 10316, and 5505 ± 2686, respectively and also the relative fecundity was 203 ± 58 egg/g body weight. Macroscopic analysis of gonads and gonadostomatic index values suggested that spawning of A. mossulensis occurs from March to June with a peak in April. Thus, A. mosullensis is considered a group-synchronous type species with a capacity for multiple ovulations within a reproductive season (multiple spawner).
    Description: Published
    Keywords: Reproductive ; Alburnus mossulensis ; Cyprinidae ; Fecundity ; Gonad development ; Gonadosomatic index ; Biology ; Age
    Repository Name: AquaDocs
    Type: Journal Contribution , Refereed
    Format: pp.135-145
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  • 9
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    [In Depth] Step aside, E. coli (2016)
    American Association for the Advancement of Science (AAAS)
    In: Science
    Details
    Publication Date: 2016-06-24
    Description: Escherichia coli has long been the bacterium of choice for laboratory experiments, but geneticist George Church and his team are hoping to save scientists time by getting them to use a faster-reproducing model organism. Vibrio natriegens is a salt marsh organism with a doubling time of as little as 10 minutes—twice the fastest time for E. coli. Church's team has released the first complete genome of V. natriegens, and hope to make it a "drop-in, turnkey alternative" to E. coli for future research. Biologists see questions still to be resolved about V. natriegens, but are cautiously optimistic about its potential. Author: Ben Panko
    Keywords: Biology
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Geosciences , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 10
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    [Editors' Choice] A pair of tablemates for aromatic benzene (2016)
    American Association for the Advancement of Science (AAAS)
    In: Science
    Details
    Publication Date: 2016-09-09
    Description: Author: Jake Yeston
    Keywords: Inorganic Chemistry
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Geosciences , Computer Science , Medicine , Natural Sciences in General , Physics
    Published by American Association for the Advancement of Science (AAAS)
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  • 11
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    [This Week in Science] Coordinated scission of N–H or O–H bonds (2016)
    American Association for the Advancement of Science (AAAS)
    In: Science
    Details
    Publication Date: 2016-11-11
    Description: Author: Jake Yeston
    Keywords: Inorganic Chemistry
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Geosciences , Computer Science , Medicine , Natural Sciences in General , Physics
    Published by American Association for the Advancement of Science (AAAS)
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  • 12
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    Palaemonetes varians (Leach) (crustace decapode) au lac de Kelbia: cas de Poecilogonie dans une meme nappe d'eau (2016)
    Station Océanographique de Salammbô | Tunis, Tunisie
    Details
    Publication Date: 2021-05-19
    Description: Le lac Kelbia nappe d'eau intermittente connu la presence de Palaemonetes varians, en deux formes l'une a gros oeufs peu nombreux, l'autre a oeufs petits et nombreux. L'identite morphologique des adultes provenant des gros oeufs charges de vitellus et petits oeufs pauvres en reserves. La validite de cette espece a laquelle doivent etre rapportes les Palaemonetes du Kelbia avec ses deux aspects possibles: macrogenitor et microgenitor
    Description: Published
    Keywords: Temperature effects ; Comparative studies ; Adaptations ; Salinity effects ; Behaviour ; Shellfish ; Biology ; Palaemonetes mesopotamicus ; Palaemonetes mesogenitor ; Palaemonetes zariquieyi ; Palaemonetes antennarius ; Palaemonetes varians ; Brackish ; Marine
    Repository Name: AquaDocs
    Type: Book/Monograph/Conference Proceedings , Refereed
    Format: 14 pp.
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  • 13
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    Aspinatrium euzeti n. sp. (Monogena-Polyopisthocotylea) parasite branchial de Dentex filosus Valenciennes, 1836 en Tunisie. (2016)
    Details
    Publication Date: 2021-05-19
    Description: Description d'une nouvelle espece de Microcotylidae du genre Aspinatrium Yamaguti, 1963 (Monogenea, Polypisthocotylea). Un hermaphrodisme protandrique, tres net, est signale chez ce parasite. La larve gyrodactylide, obtenue experimentalement, est caracteristique des Microcotylidae.
    Description: Description of a new species of Microcotylidae belonging to genus Aspinatrium Yamaguti, 1963 (Monogenea, Polypisthocotylea). This parasite is found to have a marked protandric hermaphrodisme. The gyrodactyloid larva, obtained experimentally, is typical of the Microcotylidae.
    Description: Published
    Keywords: Aspinatrium uzeti ; Animal morphology ; Parasites ; Biology ; Anatomy ; New species ; Monogenea ; Microcotylidae ; Polypisthocotylea ; Dentex filosus ; Marine
    Repository Name: AquaDocs
    Type: Journal Contribution , Refereed
    Format: pp 199-207
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  • 14
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    Biologie et pêche du poulpe Octopus vulgaris Cuvier, 1797 (Cephalopoda, Octopoda) du golfe de Gabes. (2016)
    Details
    Publication Date: 2021-05-19
    Description: Le poulpe Octopus vulgaris est etudie pour la premiere fois sur la cote sud tunisienne (Mediterranee orientale). Les caracteres biologiques, la maturite sexuelle, le regime alimentaire ainsi que la distribution en taille sont presentes. La peche et la reglementation en vigueur sont egalement discutees.
    Description: Octopus vulgaris is studied in first time on the Tunisian southern coast (eastern mediterranean coast). Biological caracteristics on sexual maturity, diet and size distribution are presented. Fishing and fishing control are also discussed.
    Description: Published
    Keywords: Biologie ; Poulpe ; Pêche ; Fishing ; Fishing ; Biological data ; Sexual maturity ; Fishery biology ; Size distribution ; Biology ; Octopus vulgaris ; Marine
    Repository Name: AquaDocs
    Type: Journal Contribution , Refereed
    Format: pp. 5-19
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  • 15
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    Contribution à l'étude de la biologie des penéides: Considérations sur les zones de répartition de Penaeus kerathurus (Forskal) dans les mers tunisiennes ; Les fonds à Parpenaeus longirostris (Lucas) des mers tunisiennes ; Étages de répartition des Pénéides d'Afrique du Nord. (2016)
    Station Océanographique de Salammbô (SOS) | Tunis, Tunisie
    Details
    Publication Date: 2021-05-19
    Description: Published
    Keywords: Pénéides ; Geographical distribution ; Abundance ; Behaviour ; Migrations ; Marine crustaceans ; Biology ; Penaeus kerathurus ; Penaeus longirostris ; Marine
    Repository Name: AquaDocs
    Type: Book/Monograph/Conference Proceedings , Refereed
    Format: 30 pp.
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  • 16
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    L'élevage de la carpe en Tunisie: Quelques aspects de sa biologie. (2016)
    Details
    Publication Date: 2021-05-19
    Description: The variety of mirror carp Cyprinus carpio specularis was introduced to Tunisia from 1965, and finds favourable conditions for its development in all breeding grounds, both in the North (Ain Sallem, Beja) and in the far south (Kebili and Douz). Some aspects are given concerning its reproduction growth, influence of temp and salinity and feeding in Tunisia.
    Description: Published
    Keywords: Carpe miroir ; Hatcheries ; Feeding ; Growth ; Organism morphology ; Reproduction ; Taxonomy ; Freshwater aquaculture ; Biology ; Barbus barbus ; Cyprinus coriaceus ; Cyprinus carpio specularis ; Cyprinus carpio communis ; Freshwater
    Repository Name: AquaDocs
    Type: Journal Contribution , Refereed
    Format: pp. 97-113
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  • 17
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    Biologie de Mullus barbatus Linnaeus, 1758 et Mullus surmuletus Linnaeus. 1758 (Poissons, Téléostéens, Mullidés) des côtes tunisiennes, taille et âge de première maturité sexuelle, cycle sexuel et coefficient de condition. (2016)
    Details
    Publication Date: 2021-05-19
    Description: L'age de premiere maturite sexuelle chez les males et les femelles des deux especes M. barbatus et Mullus surmuletus des cotes tunisiennes est d'environ un an; a partir de la deuxieme annee de vie tous les individus sont generalement matures. Les periodes et la duree de ponte varient d'une espece a l'autre. Les femelles matures de Mullus surmuletus ont une ponte precoce et courte (fin avril-debut juin), alors que chez M. barbatus, la ponte est plus tardive et plus etalee (mai-jiun-juillet).
    Description: For two tunisian coast red mullet species Mullus barbatus and Mullus surmuletus, the first sexual maturity age is attained about one year; from the second (year), almost all specimens are mature. The egg-laying periods and duration are variable in two species: Mullus surmuletus females have a precocious and short laying (from last april to start june); however, that of M. barbatus is later and spreader (from may to july).
    Description: Published
    Keywords: Age at recruitment ; Clutch ; Reproductive cycle ; Sexual maturity ; Biology ; Mullus surmuletus ; Mullus barbatus ; Marine
    Repository Name: AquaDocs
    Type: Journal Contribution , Refereed
    Format: pp. 41-51
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  • 18
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    Contribution à l'étude de la biologie des muges des lacs tunisiens. (2016)
    Station Océanographique de Salammbô (SOS) | Tunis, Tunisie
    Details
    Publication Date: 2021-05-19
    Description: Published
    Keywords: Geographical distribution ; Fish diseases ; Fishing gear ; Mullet fisheries ; Biology ; Mugil labrosus ; Mullidae ; Mugil ramada ; Mugil saliens ; Mugil cephalus ; Mugil auratus ; Marine
    Repository Name: AquaDocs
    Type: Book Section , Refereed
    Format: pp. 4-35
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  • 19
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    Biological characters of Lutianus erythopterus (Bloch, 1790) on the southeastern region of Vietnam (2016)
    Details
    Publication Date: 2021-05-19
    Description: Lutianus erythropterus (Grimson snapper) is one of the most common snappers in the southeastern region of Vietnam. The Grimson snapper fishery in this region is a very important source of food and revenue for Vietnam, but knowledge of the biology of the species is rare. This work presents first results on age and length, growth-rate, length - weight relationship, periods of spawning, feeding intensity and food composition of this species.
    Description: Published
    Keywords: Fish ; Luitianus ; Lutianus erythopterus ; Biology
    Repository Name: AquaDocs
    Type: Journal Contribution , Not Known
    Format: pp. 233-241
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