Subjects -> ENGINEERING (Total: 2677 journals)
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CHEMICAL ENGINEERING (235 journals)            First | 1 2     

Showing 201 - 236 of 236 Journals sorted alphabetically
Nanochemistry Research     Open Access   (Followers: 1)
Natural Volatiles & Essential Oils     Open Access  
Noise Control Engineering Journal     Full-text available via subscription   (Followers: 4)
npj Science of Food     Open Access  
Ochrona Srodowiska i Zasobów Naturalnych : Environmental Protection and Natural Resources     Open Access  
Open Chemical Engineering Journal     Open Access  
Periodica Polytechnica Chemical Engineering     Open Access  
Petroleum Chemistry     Full-text available via subscription   (Followers: 1)
Physics and Chemistry of Glasses - European Journal of Glass Science and Technology Part B     Full-text available via subscription  
Plasma     Open Access   (Followers: 3)
Plasma Processes and Polymers     Hybrid Journal   (Followers: 2)
Polymer     Hybrid Journal   (Followers: 86)
Polymer Bulletin     Hybrid Journal   (Followers: 6)
Polymer Composites     Hybrid Journal   (Followers: 18)
Polyolefins Journal     Open Access  
Powder Technology     Hybrid Journal   (Followers: 13)
Reaction Chemistry & Engineering     Hybrid Journal  
Reactions     Open Access  
Research on Chemical Intermediates     Hybrid Journal   (Followers: 3)
Revista Cubana de Química     Open Access  
Revista ION     Open Access  
Revista Mexicana de Ingeniería Química     Open Access  
Russian Chemical Bulletin     Hybrid Journal   (Followers: 3)
Russian Journal of Applied Chemistry     Hybrid Journal  
Solid Fuel Chemistry     Hybrid Journal  
South African Journal of Chemical Engineering     Open Access   (Followers: 3)
Surface Engineering and Applied Electrochemistry     Hybrid Journal   (Followers: 7)
Sustainable Chemical Processes     Open Access   (Followers: 3)
Synthesis Lectures on Chemical Engineering and Biochemical Engineering     Full-text available via subscription  
The Canadian Journal of Chemical Engineering     Hybrid Journal   (Followers: 5)
The Chemical Record     Hybrid Journal   (Followers: 1)
Theoretical Foundations of Chemical Engineering     Hybrid Journal   (Followers: 3)
Transition Metal Chemistry     Hybrid Journal   (Followers: 6)
Transylvanian Review of Systematical and Ecological Research     Open Access  
Upstream Oil and Gas Technology     Open Access   (Followers: 1)
Visegrad Journal on Bioeconomy and Sustainable Development     Open Access   (Followers: 1)

  First | 1 2     

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Transylvanian Review of Systematical and Ecological Research
Number of Followers: 0  

  This is an Open Access Journal Open Access journal
ISSN (Print) 1841-7051 - ISSN (Online) 2344-3219
Published by Sciendo Homepage  [370 journals]
  • A Comparison of the Effect of Blast Chilling and Electrical Stunning on
           Some Hemolymph Parameters in Red Swamp Crayfish ()

    • Abstract: The aim of the present investigation is to compare the effect of standard method and electrical stunning on some hemolymph biochemical parameters in mid-sized Red Swamp Crayfish. The results showed that electrical stunning time of induction was significantly shorter and recovery was longer than chilling stun. Parameters of an electrical field that stuns crayfish beyond the point of recovery without causing damage have been identified. Based on this experiment, it seems that electrical stunning would be preferable to the other method.
      PubDate: Sat, 30 Apr 2022 00:00:00 GMT
       
  • Taxonomic Status of the Genus (Cobitidae) from Kura-Aras River System
           (Turkey)

    • Abstract: Sabanejewia is a member of the family Cobitidae found in Europe and Asia. In previous studies, S. balcanica, S. caucasica, S. aurata and S. caspia were reported from Turkey. Of these S. aurata and S. caspia were reported from the Kura-Aras Basin. We examined morphological characters and molecular data of the Sabanejewia specimens from Turkish parts of the Kura-Aras river system to determine their taxonomic status. We found no differences between the Kura and Aras rivers’ populations in terms of morphology, but different populations showed a genetic distance of 0.1-1.9%. All the studied populations were identified as S. aurata. In addition, we could not find any evidence for the presence of S. caucasica and S. caspia in Turkey.
      PubDate: Sat, 30 Apr 2022 00:00:00 GMT
       
  • Assessment of Charophyta Flora and Ecological Status in Two High-Mountain
           Lakes (Rize, Turkey)

    • Abstract: The benthic algal composition of Charophyta in the Avusor Great Lake and Koçdüzü Great Lake at the altitude of about 3,000 m a.s.l. was investigated on 21 August 2019. A total of 112 species, belonging to Zygnematophyceae, were identified. The genera Cosmarium (44), Staurastrum (16), Closterium (15), and Euastrum (13) were most abundant. The members of filamentous charophyta were represented by two species. Bioindicator species characterize water in both lakes as clear, Class 2 of water quality and the lakes ecosystem as mesotrophic. The partly unexpected presence of certain desmids taxa, i.e., species characteristic of eutrophic water, was recorded.
      PubDate: Sat, 30 Apr 2022 00:00:00 GMT
       
  • A New Concept of Frontal Migration System for Fish ‒ for Overflow
           Weirs and River Sills

    • Abstract: In this paper we present a new frontal migration system for fish which could be used for overflow weirs and river sills. Since movement of fish is the most crucial thing in the healthy river environment fish passes are necessary to predict in any place where hydraulic structures are designed or any river engineering works are applied in the river channel. Thus in our paper we are giving a proposal of a new fish migration system when any river cross section weirs, sills or other low head hydraulic structures are planned. We hope our system would be built one day proving the advantage of using it.
      PubDate: Sat, 30 Apr 2022 00:00:00 GMT
       
  • Palynological Analysis of Surface Sediments in a High Arctic Pond,
           Revealing Desmids as Indicators of Wetlands and Climate Change

    • Abstract: This is a first attempt to study the palynological remains from the surface sediments of a pond near the Kongsfjorden coast in Ny-Alesund, Svalbard, Norway. The palynomorphs display a high relative abundance of desmids, Cladocera, thecamoebians, chironomids, and fungal remains inherent to the inland aquatic ecosystem. The Cosmarium indicators characterize water as neutral pH, fresh, mesotrophic, without organic pollution, Class 2 of Water Quality as in wetlands with coastal vegetation. The single procedure of palynological analysis excluding the acetolysis step, and bioindicators allows us to perceive the basic framework of the ecosystem, consisting of in-situ and transported remains. This approach could be effectively used for paleoenvironmental reconstructions in High Arctic Regions.
      PubDate: Sat, 30 Apr 2022 00:00:00 GMT
       
  • Diversity and Ecology of Non-Diatom Algae in a Swampy Mountain Lake of the
           Suntar-Khayat Ridge (Republic Sakha, Yakutia, Russia)

    • Abstract: The first studied flora of a mountain lake on the Suntar-Khayat ridge was represented by 170 species of non-diatoms in addition to 112 previously studied diatoms. The calculated similarity indices, correlation analysis and bioindication showed the uniqueness of the non-diatom flora, dominated by charophytes in general and species of the genera Cosmarium and Closterium. The results of the study of flora suggest that the altitude and the lake location in the zone of the Arctic deserts were major factors that affected the process of formation of the unique species composition.
      PubDate: Sat, 30 Apr 2022 00:00:00 GMT
       
  • A Review of Current Knowledge on Parasites of Non-Indigenous Fish Species
           in the Inland Waters of Turkey

    • Abstract: The parasite fauna of alien fish species living in the new habitats has rarely been investigated and there is still poor information about this topic.This research not only provides a thorough list of parasite taxa found in non-indigenous fish species in Turkey, but it highlights the risk of infection for both native and alien ichthyofauna.With respect of native range, exotic fishes imported into Turkey have been found to be hosts for parasities from Eurasian, Asian, and North American origins, respectively.
      PubDate: Sat, 30 Apr 2022 00:00:00 GMT
       
  • Epizootic Ulcerative Syndrome (EUS) Fish Disease Chronology, Status and
           Major Outbreaks in the World

    • Abstract: Epizootic Ulcerative Syndrome (EUS) has been causing large-scale mortality among the freshwater fishes of the globe since the 1070s.The symptoms include large haemorrhagic cutaneous ulcers, epidermal degeneration and necrosis followed by sloughing of scales. There have been many studies on EUS throughout the world. In India, since the initiation of EUS, in 1988, our study tried to reveal the aetiology of the disease through extensive and intensive studies on different aspects, like limnological, physical, chemical, bacteriological, fungal, viral including electron microscopic studies. Details of EUS investigation has been discussed in the present paper.
      PubDate: Wed, 03 Nov 2021 00:00:00 GMT
       
  • Occurrence, Abundance and Distribution of Bleak, Common Spirlin, and
           Sunbleak in the Environmental Gradients of Small Rivers (Tatarstan)

    • Abstract: The probability of occurrence, distribution, and abundance of bleak, common spirlin, and sunbleak in 316 small rivers of the Republic of Tatarstan were studied. The studied region has a high geographical and environmental heterogeneity. The impact of environmental factors on species occurrence was analyzed with generalized linear models. Among the selected fish, sunbleak had the highest probability of occurrence, and bleak had the highest abundance. Elevation was the only environmental variable significantly affecting the probability of occurrence of all three species. With an increase in elevation, the probability of occurrence of bleak, common spirlin, and sunbleak significantly decreased. Optimum values and niche breadth differed significantly between fish species for some of the environmental variables.
      PubDate: Wed, 03 Nov 2021 00:00:00 GMT
       
  • Cladocera from the Sediment of High Arctic Lake in Svalbard (Norway)

    • Abstract: The High Arctic Region’s freshwater ecosystems serve as hot spots to study the impact of extreme warming conditions on the biota. The cladoceran remains have been recovered from the surface sediments of a non-marine water body near Ny-Alesund, Svalbard, Norway. The cladoceran (crustaceans) belongs to the Chydorus sphaericus group Frey, 1980 and Daphnia pulex Leydig, 1860. The ecology of the species suggests that they lived in a well-developed ecosystem with Water Quality Class 3. This study has implications for understanding the response of the present-day biota experiencing the changing climate conditions and using these remains for assessing palaeoenvironmental conditions.
      PubDate: Wed, 03 Nov 2021 00:00:00 GMT
       
  • A Study on Marine Fishery Resources of Andhra Pradesh: Ecological Aspects
           and Morphometrics of Common Marine Fishes of Visakhapatnam ‒ Protein
           Content and Bioaccumulation of Heavy Metals in Pomfret Fish Species

    • Abstract: 212 marine fishery resources were recorded in the waters of Andhra Pradesh State. Morphometric data was provided for 20 edible fishery resources landing at the fishing harbour of Visakhapatnam. The harbour area is polluted due to influx of various industrial effluents and domestic sewage. In Pampus argenteus, P. chinensis and Parastromateus niger, the total protein content is 16.24-19.58%. Further, arsenic concentration in muscle and gill portions individually or combined in all three of the species is highly negligible. Cadmium, mercury, and lead levels in the muscle and gills of these species are within or slightly above the recommended limits set by EU (2006) and FAO (2003), FAO/WHO (2011), MAFF, and FSSAI (2011) indicating that the consumption of these fishes is not harmful.
      PubDate: Wed, 03 Nov 2021 00:00:00 GMT
       
  • Reproductive Biology of the Tigris Scraper, (Heckel, 1843) Population
           Living in Solhan Creek of Murat River (Bingöl, Turkey)

    • Abstract: We studied the reproductive traits in 23 of 190 individuals of Capoeta umbla caught monthly in the Solhan Creek of the Murat River between April 2017 and March 2018. The sex ratio (F:M) was found to be 1:1.11. The macroscopic examination of the gonads and gonado-somatic index indicated that the reproductive period lasted from May to August with peak activity in May. The fecundity ranged from 2,000 to 9,000 oocytes, and it correlated with the total length and body weight. This work represents the first attempt to investigate the reproductive traits of the Capoeta umbla population in the Solhan Creek. The results provide information on the reproductive biology and contribute to the conservation of the fish population and its sustainable management.
      PubDate: Wed, 03 Nov 2021 00:00:00 GMT
       
  • Histological Study of the Immune System in Zebrafish, (Hamilton, 1822)

    • Abstract: The aim of the present study was to investigate the cellular characteristics of the immune tissues of Zebrafish, Danio rerio (Hamilton, 1822). The fish were fixed in Bouin՚s solution for 24 hours then dehydrated, cleared, paraffinized, embedded and finally sectioned, stained and observed through optical microscopy. Results showed that immune system tissues of Zebrafish include the apical part of the kidney, thymus, and spleen. The apical part of the kidney was composed of hematopoietic tissue containing blood and immune cells. The spleen was a single organ located at the abdominal cavity containing melanomacrophages. The thymus was observed as a paired organ at the posterior part of the branchial cavity. Results showed that the immune system of the Zebrafish was dispersed in several organs of the body and that this species could be used as a laboratory model organism in immune system studies.
      PubDate: Wed, 03 Nov 2021 00:00:00 GMT
       
  • Urban Aquatic Ecosystems as a Factor of the Spread of Antibiotic Resistant
           Microorganisms and Resistance Genes

    • Abstract: In this work, studies have been conducted to detect antibiotic resistance microorganisms and resistance genes in the natural waters of the Uzh River, which flows in the Carpathian region (Ukraine) and flows into the Laborec River in the territory of Slovakia. Among the most common microorganisms of the Uzh River, there has been a high level of resistance to tetracyclines, β-lactams, and antibiotics of the last line of defence (carbapenems, fourth-generation fluoroquinolones). The results of molecular genetic analysis indicate the presence of resistance genes bla tet-M, bla CTX-M, bla TEM, and bla KPC in microorganisms of the Enterobacteriaceae family.
      PubDate: Wed, 03 Nov 2021 00:00:00 GMT
       
  • Bioindication of Water Quality by Diatom Algae in High Mountain Lakes of
           the Natural Park of Artabel Lakes, (Gümüşhane, Turkey)

    • Abstract: The first results of bioindicative analysis of water quality in the high-mountainous lakes of the Artabel Lakes Natural Park are presented using diatom species. A total of 95 diatom taxa collected in August 2013 and 2016 were identified and used as bioindicators for ten environmental variables. Bioindication, statistical methods and comparative floristic results show that the waters in all the lakes studied were fresh, low-saline, with circum-neutral pH and organically uncontaminated. The results of bioindication can be used as etalons for future monitoring of lakes in order to protect species found in the natural park, and can also be included in the national system of water quality standards in Turkey.
      PubDate: Sat, 13 Mar 2021 00:00:00 GMT
       
  • Influence of Alien Species L., 1753 on Representative Species of Genus in
           Ukraine

    • Abstract: This work purpose was to find the impact of Pistia stratiotes L., 1753 - a new species on the territory of Ukraine, on the vitality of other free-floating hydrophytes so-called pleuston- Salvinia natans (L.) All., 1785, S. laevigatum (Humb. and Bonpl. ex Willd.) Heine, 1968, to determine the degree of stability and competitiveness of these species for resources in natural ecosystems relatively to the undesirable species. To find out the influence of P. stratiotes on other free-floating on the water surface plant species which compete for elements of nutrition among each other, we have investigated changes in the content of photosynthetic pigments in S. laevigatum and S. natans, which were exhibited with P. stratiotes for 14 days. Besides changes in water indices, oxygen content, mineralization and pH, were measured.
      PubDate: Sat, 13 Mar 2021 00:00:00 GMT
       
  • Range Map and Distribution of Heckel 1847 in the Tigris and Euphrates
           River Basins

    • Abstract: Luciobarbus barbulus Heckel, 1847 was described from water bodies around Shiraz and the Qara Aqaj River, one of the main rivers in Shiraz City, Iran. In the present study localities, a geographical range map of Luciobarbus barbulus and new data on the present status of this species are presented. In our latest sampling we assessed for the first time the presence of this species in the Lesser Zab River where no specimen had been collected in the past on this part of the river. The detailed distribution of Luciobarbus barbulus, based on the captured specimens, and literature records of this species are mentioned.
      PubDate: Sat, 13 Mar 2021 00:00:00 GMT
       
  • Species and Thallus Structure Diversity of Chlorophyta in Shore Platform
           of Dwarka (Gujarat Coast, India)

    • Abstract: Present study shows the species and thallus structure diversity of Chlorophyta in shore platform of Dwarka, Gujarat Coast. Chlorophyta were surveyed based on systematic random sampling for two years: April 2013 to April 2015. Total 27 species of Chlorophyta were identified through intensive fieldwork survey based on line transect and quadrate based methods. This study identifies four orders, nine families, 13 genera and 27 species among the green macroalgae population inhabiting the rock shore platform of Dwarka. Total 27 species of Chlorophyta have been found with major nine thallus types and 19 sub types of thallus structure. Ramiform and filamentous types of thallus structure are most common in this study.
      PubDate: Sat, 13 Mar 2021 00:00:00 GMT
       
  • The Fish Fauna of the Zarineh River (Urmia Lake Basin) Downstream Sector
           – Conservation and Management

    • Abstract: This study aimed to investigate the fish fauna in the downstream sector of the Zarineh River, Urmia Lake basin. Seven stations were sampled along the Zarineh River before and after Shahin-Dezh City to help gain a better understanding of human activities on its fish fauna. The results revealed 11 fish species, which belong to three families, including Cyprinidae, Nemacheilidae and Gobiidae. Nine of them were Cyprinidae. Out of 11 species, five species, Carassius gibelio, Rhodeus amarus, Pseudorasbora parva, Hemiculter leucisculus and Rhinogobius lindbergii were exotic that were unintentionally introduced to the Zarineh River along with Asian carps. The threats to fish fauna are categorized into two categories: natural and anthropogenic. According to the observations, anthropogenic activities such as overfishing, pollutions, sand and gravel extraction, dam construction and introduction of exotic fish species were among the main threats for the ichthyofauna of the Zarineh River.
      PubDate: Sat, 13 Mar 2021 00:00:00 GMT
       
 
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