Abstract The aim of this study was to determine the influence of season, age, sex, parity and gestation status on some biochemical parameters in local cross-bred goats raised in Tiaret, Algeria. Ninety cross bred local goats, from 2019 to 2020, aged between nine and seventy-two months at different physiological stage were used. Animals belong to different farms in Tiaret located at the north-west Algeria (35°22’ N, 1°19’ E). The mean values of triglycerides, creatinine and calcium were significantly (p<0,05) higher in winter than in spring. The physiological state of the goat had a significant influence (p<0,05) on cholesterol, urea, total proteins, calcium and phosphorus, with a high average values in non-pregnant goats, while triglycerides and globulin had significant higher values in postpartum and pregnant femals, respectively. In our work, parity had a significant influence (p<0,05) on cholesterol, calcium and phosphorus, with high average values in young goats and a significant influence (p<0,05) on triglycerides and creatinine with high average values in primiparous ones. Age significantly influenced (p<0,05) cholesterol, triglycerides, total protein, calcium and globulin. The results obtained from this study could serve as reference values for the local goats and other regions or countries with similar climatic and nutritional conditions.
{"title":"Biochemical parameters variations with season, age, sex, parity and pregnancy in crossbred goats raised in Tiaret, Algeria","authors":"Berrani Abdelkader, Meliani Samia, Bourabah Akila","doi":"10.2478/asn-2021-0006","DOIUrl":"https://doi.org/10.2478/asn-2021-0006","url":null,"abstract":"Abstract The aim of this study was to determine the influence of season, age, sex, parity and gestation status on some biochemical parameters in local cross-bred goats raised in Tiaret, Algeria. Ninety cross bred local goats, from 2019 to 2020, aged between nine and seventy-two months at different physiological stage were used. Animals belong to different farms in Tiaret located at the north-west Algeria (35°22’ N, 1°19’ E). The mean values of triglycerides, creatinine and calcium were significantly (p<0,05) higher in winter than in spring. The physiological state of the goat had a significant influence (p<0,05) on cholesterol, urea, total proteins, calcium and phosphorus, with a high average values in non-pregnant goats, while triglycerides and globulin had significant higher values in postpartum and pregnant femals, respectively. In our work, parity had a significant influence (p<0,05) on cholesterol, calcium and phosphorus, with high average values in young goats and a significant influence (p<0,05) on triglycerides and creatinine with high average values in primiparous ones. Age significantly influenced (p<0,05) cholesterol, triglycerides, total protein, calcium and globulin. The results obtained from this study could serve as reference values for the local goats and other regions or countries with similar climatic and nutritional conditions.","PeriodicalId":7171,"journal":{"name":"Acta Scientifica Naturalis","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46892080","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Abstract St. Anastasia Island is one of the symbols of the cultural and historical heritage of the Republic of Bulgaria. This raises the need for the study of risky oceanographic factors, climatic phenomena, risky geological processes as well as detailed petrographical characteristics of the Upper Cretaceous volcanic rocks forming the islands. The results of the petrographical study show that the island was built by Alkali feldspar trachytes. The volcanics from St. Anastasia Island shows a close petrochemical similarity to the volcanics from Alatepenski paleovolcano belonging to the “Peripheral Volcanic Centers” in the region.
{"title":"Geological-geomorphological characteristics and petrographical composition of the St. Anastasia Island","authors":"D. Dimitrov, B. Banushev","doi":"10.2478/asn-2021-0010","DOIUrl":"https://doi.org/10.2478/asn-2021-0010","url":null,"abstract":"Abstract St. Anastasia Island is one of the symbols of the cultural and historical heritage of the Republic of Bulgaria. This raises the need for the study of risky oceanographic factors, climatic phenomena, risky geological processes as well as detailed petrographical characteristics of the Upper Cretaceous volcanic rocks forming the islands. The results of the petrographical study show that the island was built by Alkali feldspar trachytes. The volcanics from St. Anastasia Island shows a close petrochemical similarity to the volcanics from Alatepenski paleovolcano belonging to the “Peripheral Volcanic Centers” in the region.","PeriodicalId":7171,"journal":{"name":"Acta Scientifica Naturalis","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44774433","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Mouffok Abdenacer, Nancib Aicha, B. Joseph, Nancib Nabil
Abstract In the present work, L-glutamic acid production by Corynebacterium glutamicum fermentation on date juice extracts applying two fed-batch feeding modes, pulsed and continuous, were investigated. According to the obtained results, the continuous feeding fed-batch mode was found to be the most efficient process. Moreover the continuous feeding rate mode with a feeding medium containing date juice sugars enriched with ammonium sulfate was found even more favorable as it enhances the L-glutamic acid production by approximately 2.35 fold more than the batch culture and by about 1.17 fold more than the pulsed feeding. In this respect, comparing the traditional batch culture to the continuously fed culture with a medium containing date juice sugars with ammonium sulfate showed increases of 135.47% in L-glutamic acid production, 104% in productivity, 39.09% in biomass, and 47.69% in the yield respectively allowing us to reach a final L-glutamic acid concentration of about 138 g/L, the highest ever published.
{"title":"High production of L-glutamic acid from date juice extracts by Corynebacterium glutamicum using fed-batch cultures: pulsed and continuous feeding modes","authors":"Mouffok Abdenacer, Nancib Aicha, B. Joseph, Nancib Nabil","doi":"10.2478/asn-2021-0004","DOIUrl":"https://doi.org/10.2478/asn-2021-0004","url":null,"abstract":"Abstract In the present work, L-glutamic acid production by Corynebacterium glutamicum fermentation on date juice extracts applying two fed-batch feeding modes, pulsed and continuous, were investigated. According to the obtained results, the continuous feeding fed-batch mode was found to be the most efficient process. Moreover the continuous feeding rate mode with a feeding medium containing date juice sugars enriched with ammonium sulfate was found even more favorable as it enhances the L-glutamic acid production by approximately 2.35 fold more than the batch culture and by about 1.17 fold more than the pulsed feeding. In this respect, comparing the traditional batch culture to the continuously fed culture with a medium containing date juice sugars with ammonium sulfate showed increases of 135.47% in L-glutamic acid production, 104% in productivity, 39.09% in biomass, and 47.69% in the yield respectively allowing us to reach a final L-glutamic acid concentration of about 138 g/L, the highest ever published.","PeriodicalId":7171,"journal":{"name":"Acta Scientifica Naturalis","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46539945","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Abstract The accumulating ability of the atmospheric Metal Trace Elements (MTE) of two lichenic species thalli; Xanthoria parietina and Ramalina farinacea were evaluated in the region of Megres. The recorded concentrations of MTE (Fe, Cu, Mn, Cd, and Pb) were determined by atomic absorption spectrophotometry (AASF). The ability to accumulate MTE in X. parietina thalli is considerably greater than that of the fruticulous lichen R. farinacea in all stations studied. The general pattern of the elements accumulated in the thalli of the two species in decreasing order of their concentrations was Fe> Mn> Pb> Cu> Cd. The Fe values are very high in X. parietina thalli with an average of 35237.5 ± 3394.2 mg/kg dry wt. In contrast, the Pb concentrations are high, especially in the southern station of the Megres region. The results showed that X. parietina is a hyper-accumulating species of MTE, compared to R. farinacea. This work highlights the ecological importance of this species as a stable and resistant pioneer in this fragile region.
{"title":"Ability of metal trace elements accumulation by Lichens, Xanthoria parietina and Ramalina farinacea, in Megres area (Setif, Algeria)","authors":"Belguidoum Amina, Lograda Takia, Ramdani Messaoud","doi":"10.2478/asn-2021-0008","DOIUrl":"https://doi.org/10.2478/asn-2021-0008","url":null,"abstract":"Abstract The accumulating ability of the atmospheric Metal Trace Elements (MTE) of two lichenic species thalli; Xanthoria parietina and Ramalina farinacea were evaluated in the region of Megres. The recorded concentrations of MTE (Fe, Cu, Mn, Cd, and Pb) were determined by atomic absorption spectrophotometry (AASF). The ability to accumulate MTE in X. parietina thalli is considerably greater than that of the fruticulous lichen R. farinacea in all stations studied. The general pattern of the elements accumulated in the thalli of the two species in decreasing order of their concentrations was Fe> Mn> Pb> Cu> Cd. The Fe values are very high in X. parietina thalli with an average of 35237.5 ± 3394.2 mg/kg dry wt. In contrast, the Pb concentrations are high, especially in the southern station of the Megres region. The results showed that X. parietina is a hyper-accumulating species of MTE, compared to R. farinacea. This work highlights the ecological importance of this species as a stable and resistant pioneer in this fragile region.","PeriodicalId":7171,"journal":{"name":"Acta Scientifica Naturalis","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46912771","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
A. Bouzid, K. Benabdeli, Benamar Belgharbi, K. Bouzid
Abstract Under the combined effect of anthropogenic pressures and climate change, forest ecosystems can no longer play their ecological and economic role if nothing is done to adapt them. The impacts of fires, overgrazing and overexploitation are that over 60% of forest ecosystems are in an advanced stage of degradation. It is in this context that a new strategy focused on ecological restoration must be quickly put in place. It must be based on ecological alternatives designed to adapt the composition and structure of these plant formations to environmental conditions. The concept of stable species, living space, keystone species, natural attributes and habitat identification. The ecological restoration proposed will allow preserving the vegetal cover at first time and then developing the species with resilience through a list of species that could develop under different pressures, both natural and anthropogenic.
{"title":"Contribution of ecological restoration in preservation of forests ecosystems in Algeria","authors":"A. Bouzid, K. Benabdeli, Benamar Belgharbi, K. Bouzid","doi":"10.2478/asn-2021-0009","DOIUrl":"https://doi.org/10.2478/asn-2021-0009","url":null,"abstract":"Abstract Under the combined effect of anthropogenic pressures and climate change, forest ecosystems can no longer play their ecological and economic role if nothing is done to adapt them. The impacts of fires, overgrazing and overexploitation are that over 60% of forest ecosystems are in an advanced stage of degradation. It is in this context that a new strategy focused on ecological restoration must be quickly put in place. It must be based on ecological alternatives designed to adapt the composition and structure of these plant formations to environmental conditions. The concept of stable species, living space, keystone species, natural attributes and habitat identification. The ecological restoration proposed will allow preserving the vegetal cover at first time and then developing the species with resilience through a list of species that could develop under different pressures, both natural and anthropogenic.","PeriodicalId":7171,"journal":{"name":"Acta Scientifica Naturalis","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48584728","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Abstract In order to evaluate the Diptera biodiversity in the Boumerzoug sub-basin, samples were performed at five permanent oueds: El Berda Oued, Boumerzoug Oued, El Guareh Oued, Hmimime Oued, and Sigus Oued. Sampling was carried out monthly during the period from December 2014 to November 2015. The samples were taken using a Surber mesh for the lotic face with size 25 cm * 20 cm * 65 cm, 500 µm net. In total, 53484 individuals comprising 24 families were collected. The Chironomidae family is the most dominant with a population of 43553 individuals (Fc % = 81.43%), followed by the Simuliidae (5137 individuals, Fc % = 9.61%), Psychodidae (1907 individuals, Fc % = 3.57%), Ephydridae (1509 individuals (Fc % = 2.81%) and Sciaridae (313 individuals, Fc % = 0.59%). However the remained families (Culicidae, Asilliidae, Mycetophilidae, Tipulidae, Syrphidae, Tabanidae, Muscidae, Calliphoridae, Ceratopogonidae, Fanniidae, Cecidomyiidae, Anthomyiidae, Sphaeroceidae, Sciomyzidae, Stratiomyidae, and Phoridae) weree poorly represented (between 1 individual (Fc % <0.00%) to 281 individuals (Fc % = 0.53%) were collected with predominance. Finally, compared to the other families, the predominance of the Chironomidae family can be explained by the fact that this family plays an important ecological role in wetlands rich in organic matter, even clearly polluted.
{"title":"Dipters from the sub-basin of Boumerzoug (Constantine - Algeria)","authors":"Bekhouche Naima, Marniche Faiza, Ouldjaoui Abdallah, Khammar Hichem, Gherraf Noureddine, Mohand Ouali Ferroudja, M. Lydia","doi":"10.2478/asn-2021-0005","DOIUrl":"https://doi.org/10.2478/asn-2021-0005","url":null,"abstract":"Abstract In order to evaluate the Diptera biodiversity in the Boumerzoug sub-basin, samples were performed at five permanent oueds: El Berda Oued, Boumerzoug Oued, El Guareh Oued, Hmimime Oued, and Sigus Oued. Sampling was carried out monthly during the period from December 2014 to November 2015. The samples were taken using a Surber mesh for the lotic face with size 25 cm * 20 cm * 65 cm, 500 µm net. In total, 53484 individuals comprising 24 families were collected. The Chironomidae family is the most dominant with a population of 43553 individuals (Fc % = 81.43%), followed by the Simuliidae (5137 individuals, Fc % = 9.61%), Psychodidae (1907 individuals, Fc % = 3.57%), Ephydridae (1509 individuals (Fc % = 2.81%) and Sciaridae (313 individuals, Fc % = 0.59%). However the remained families (Culicidae, Asilliidae, Mycetophilidae, Tipulidae, Syrphidae, Tabanidae, Muscidae, Calliphoridae, Ceratopogonidae, Fanniidae, Cecidomyiidae, Anthomyiidae, Sphaeroceidae, Sciomyzidae, Stratiomyidae, and Phoridae) weree poorly represented (between 1 individual (Fc % <0.00%) to 281 individuals (Fc % = 0.53%) were collected with predominance. Finally, compared to the other families, the predominance of the Chironomidae family can be explained by the fact that this family plays an important ecological role in wetlands rich in organic matter, even clearly polluted.","PeriodicalId":7171,"journal":{"name":"Acta Scientifica Naturalis","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42027289","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
M. Ahmed, M. Amirat, Saâd Aissat, M. Aissa, B. Khiati
Abstract Antifungal of bee products have been shown to be protective against microbial biofilms invasion Sahara honey and propolis were applied as an antimicrobial in treatment for many infections in Algeria. In this study, Fourier transform infrared spectroscopy (FTIR) analysis was utilized to characterize the chemical structures and functional groups. In addition, in this study, we determined the anti-candida activity of honey used alone or in combination with propolis. Proteins, carbohydrates, carboxylic acids, free amino acids, cellulose and lipids, ketones and phenol compounds were identified by FTIR analysis. Combination of Sahara honey and propolis increased antifungal efficacy, compared to compounds tested alone. Propolis increased the anti-candidal effect of Sahara honey. In addition, the treatment of Sahara honey and Propolis-Sahara honey catheters with a Candida albicans biofilms reduced biofilm formation after 24 and 48-h exposure period. The results provide evidence that honey/propolis combination may help in designing a more potent novel, natural antibiofilm blend at sufficiently low concentrations in medical domain.
{"title":"FTIR characterization of Sahara honey and propolis and evaluation of its anticandidal potentials","authors":"M. Ahmed, M. Amirat, Saâd Aissat, M. Aissa, B. Khiati","doi":"10.2478/asn-2020-0032","DOIUrl":"https://doi.org/10.2478/asn-2020-0032","url":null,"abstract":"Abstract Antifungal of bee products have been shown to be protective against microbial biofilms invasion Sahara honey and propolis were applied as an antimicrobial in treatment for many infections in Algeria. In this study, Fourier transform infrared spectroscopy (FTIR) analysis was utilized to characterize the chemical structures and functional groups. In addition, in this study, we determined the anti-candida activity of honey used alone or in combination with propolis. Proteins, carbohydrates, carboxylic acids, free amino acids, cellulose and lipids, ketones and phenol compounds were identified by FTIR analysis. Combination of Sahara honey and propolis increased antifungal efficacy, compared to compounds tested alone. Propolis increased the anti-candidal effect of Sahara honey. In addition, the treatment of Sahara honey and Propolis-Sahara honey catheters with a Candida albicans biofilms reduced biofilm formation after 24 and 48-h exposure period. The results provide evidence that honey/propolis combination may help in designing a more potent novel, natural antibiofilm blend at sufficiently low concentrations in medical domain.","PeriodicalId":7171,"journal":{"name":"Acta Scientifica Naturalis","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2020-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49487947","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Rayene Ouelbani, Souheir Bensari, M. Yılmaz, C. Bensouici, Esma Gökalp, Meroua Ahmedchaouch, D. Khelifi
Abstract The aim of this study was to evaluate antioxidant, antibacterial, and anticholinesterase activities of different extracts of an uninvestigated endemic species Bellevalia mauritanica Pomel, and identification of its phenolic and flavonoid content by a comprehensive and validated LC-MS/MS method using 37 phytochemical standards. Moreover, the phytochemical profiling of the studied extracts was accomplished by LC-MS-IT-TOF technique. Among all the tested extracts, ethyl acetate (EtOAc) of BRCE (bulbs-roots crude extract) was the most active one. It exhibited a medium antibacterial activity, good inhibition of acetylcholinesterase and a good antioxidant activity in ABTS•+ (2,2’-azinobis-(3-ethylbenzothiazoline-6-sulfonique), DPPH• (1,1’-diphenyl-2-picrylhydrazyl radical), and superoxyde DMSO (dimethyl sulfoxide) alkaline scavenging assays. LC-MS/MS analysis revealed that EtOAc extract had caffeic acid (1240.7 µg/g extract) and chloroform extract had vanillin (2048.5 µg/g extract) in considerable amounts. They also contained good amounts of certain phytochemicals such as protocatechuic acid (274.3 and 145.2 µg/g extract), p-coumaric acid (382.8 and 310.9 µg/g extract), ferulic acid (361.2 and 969.4 µg/g extract) and kaempferol (146.7 and 150.6 µg/g extract) respectively. LC-MS-IT-TOF screening revealed the presence of 91 major phytochemicals in the three extracts derived from bulb-roots crude extract.
{"title":"Chemical profiling and in vitro antioxidant, antibacterial and anticholinesterase activities of an endemic North African species Bellevalia mauritanica Pomel","authors":"Rayene Ouelbani, Souheir Bensari, M. Yılmaz, C. Bensouici, Esma Gökalp, Meroua Ahmedchaouch, D. Khelifi","doi":"10.2478/asn-2020-0031","DOIUrl":"https://doi.org/10.2478/asn-2020-0031","url":null,"abstract":"Abstract The aim of this study was to evaluate antioxidant, antibacterial, and anticholinesterase activities of different extracts of an uninvestigated endemic species Bellevalia mauritanica Pomel, and identification of its phenolic and flavonoid content by a comprehensive and validated LC-MS/MS method using 37 phytochemical standards. Moreover, the phytochemical profiling of the studied extracts was accomplished by LC-MS-IT-TOF technique. Among all the tested extracts, ethyl acetate (EtOAc) of BRCE (bulbs-roots crude extract) was the most active one. It exhibited a medium antibacterial activity, good inhibition of acetylcholinesterase and a good antioxidant activity in ABTS•+ (2,2’-azinobis-(3-ethylbenzothiazoline-6-sulfonique), DPPH• (1,1’-diphenyl-2-picrylhydrazyl radical), and superoxyde DMSO (dimethyl sulfoxide) alkaline scavenging assays. LC-MS/MS analysis revealed that EtOAc extract had caffeic acid (1240.7 µg/g extract) and chloroform extract had vanillin (2048.5 µg/g extract) in considerable amounts. They also contained good amounts of certain phytochemicals such as protocatechuic acid (274.3 and 145.2 µg/g extract), p-coumaric acid (382.8 and 310.9 µg/g extract), ferulic acid (361.2 and 969.4 µg/g extract) and kaempferol (146.7 and 150.6 µg/g extract) respectively. LC-MS-IT-TOF screening revealed the presence of 91 major phytochemicals in the three extracts derived from bulb-roots crude extract.","PeriodicalId":7171,"journal":{"name":"Acta Scientifica Naturalis","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2020-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49619142","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Abstract An efficient method for regioselective synthesis of 5-(dimethoxyphosphoryl)-allenecarboxylates by an atom economical [2,3]-sigmatropic rearrangement of the mediated 3-(dimethoxyphosphanyloxy)-alk-4-ynoates is described. Alkyl 5-(dimethoxyphosphoryl)-alka-3,4-dienoates can be readily prepared via reaction of alkyl 3-hydroxy-alk-4-ynoates with dimethylchlorophosphite in the presence of a base. Alkyl 3-hydroxy-alk-4-ynoates were prepared by reaction of the metallated acetylenes with commercialy available alkyl 3-oxoalkanoates.
{"title":"Bifunctionalized Allenes. Part XXIII. An Efficient Method for Regioselective Synthesis of 5-Phosphorylated Allenecarboxylates","authors":"Hasan H. Hasanov, Ivaylo K. Ivanov, V. Christov","doi":"10.2478/asn-2020-0029","DOIUrl":"https://doi.org/10.2478/asn-2020-0029","url":null,"abstract":"Abstract An efficient method for regioselective synthesis of 5-(dimethoxyphosphoryl)-allenecarboxylates by an atom economical [2,3]-sigmatropic rearrangement of the mediated 3-(dimethoxyphosphanyloxy)-alk-4-ynoates is described. Alkyl 5-(dimethoxyphosphoryl)-alka-3,4-dienoates can be readily prepared via reaction of alkyl 3-hydroxy-alk-4-ynoates with dimethylchlorophosphite in the presence of a base. Alkyl 3-hydroxy-alk-4-ynoates were prepared by reaction of the metallated acetylenes with commercialy available alkyl 3-oxoalkanoates.","PeriodicalId":7171,"journal":{"name":"Acta Scientifica Naturalis","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2020-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47008177","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Moulkheir Selmani, S. Meliani, M. Kouidri, Karim Berrouaguia, Sofiane Raouf Khelil, M. Chafaa
Abstract The present study aimed to assess the season and pregnancy influence on minerals serum of local rabbits raised in semi-arid climate type. Fifty-nine multiparous does was used in this study during 2019. The semi-intensive rhythm of reproduction was used. All pregnant does were at the late stage of pregnancy at the sampling date. Serum samples were collected in two seasons: winter and summer. In this study, biochemical parameters concentrations of pregnant rabbits were significantly higher (p<0,05) compared with non-pregnant rabbit. The value of biochemical parameters total protein, albumin, triglyceride, cholesterol, calcium, and phosphorusus changed significantly. In this study, most parameters were influenced by pregnancy.
{"title":"Effect of season and pregnancy on minerals serum variations of local rabbits in Tiaret, Algeria","authors":"Moulkheir Selmani, S. Meliani, M. Kouidri, Karim Berrouaguia, Sofiane Raouf Khelil, M. Chafaa","doi":"10.2478/asn-2020-0034","DOIUrl":"https://doi.org/10.2478/asn-2020-0034","url":null,"abstract":"Abstract The present study aimed to assess the season and pregnancy influence on minerals serum of local rabbits raised in semi-arid climate type. Fifty-nine multiparous does was used in this study during 2019. The semi-intensive rhythm of reproduction was used. All pregnant does were at the late stage of pregnancy at the sampling date. Serum samples were collected in two seasons: winter and summer. In this study, biochemical parameters concentrations of pregnant rabbits were significantly higher (p<0,05) compared with non-pregnant rabbit. The value of biochemical parameters total protein, albumin, triglyceride, cholesterol, calcium, and phosphorusus changed significantly. In this study, most parameters were influenced by pregnancy.","PeriodicalId":7171,"journal":{"name":"Acta Scientifica Naturalis","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2020-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46264496","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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