Bibliografie tematiche / Butyrique, derive

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Letteratura scientifica selezionata sul tema "Butyrique, derive"

Autore: Grafiati
Pubblicato: 4 giugno 2021
Ultima modifica: 17 febbraio 2022

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Articoli di riviste sul tema "Butyrique, derive"

1

Fang, Lei-Lei, Hai-Qiong Yu, Rui-Jin Wu, Chong He, Meng Li, Hao Yan, Jian-Jie Li et al. "Thrombospondin 1 Modulates Monocyte Properties to Suppress Intestinal Mucosal Inflammation". Journal of Innate Immunity 7, n. 6 (2015): 601–11. http://dx.doi.org/10.1159/000398799.

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Abstract (sommario):
Monocytes (Mos) play an important role in the pathogenesis of intestinal mucosal inflammation. This study aims to investigate the mechanism by which the intestinal epithelial cell-derived thrombospondin 1 (TSP1) modulates Mo properties and regulates intestinal inflammatory responses. In this study, the production of TSP1 by intestinal epithelial cells was evaluated by quantitative real-time PCR and Western blotting. The properties of Mos were analyzed by flow cytometry. A mouse model of colitis was created to assess the role of epithelium-derived TSP1 in the suppression of intestinal inflammation. The results demonstrated that mouse intestinal epithelial cells (IECs) expressed TSP1, which was markedly upregulated by butyrate or feeding with Clostridium butyricum. Coculture of the butyrate-primed IECs and Mos or exposure of Mos to TSP1 in the culture induced the expression of transforming growth factor (TGF)-β in Mos. These TGF-β+ Mos had tolerogenic properties that could promote generation of inducible regulatory T cells. Adoptive transfer with TSP1-primed Mos, or feeding C. butyricum could prevent experimental colitis in mice. In summary, C. butyricum induces intestinal epithelial cells to produce TSP1 and induces TGF-β+ Mos, which further suppress experimental colitis in mice. The results implicate that the administration of C. butyricum or butyrate may have the potential to ameliorate chronic intestinal inflammation through inducing immunosuppressive Mos.
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2

Chatzifragkou, Afroditi, David Dietz, Michael Komaitis, An-Ping Zeng e Seraphim Papanikolaou. "Effect of biodiesel-derived waste glycerol impurities on biomass and 1,3-propanediol production of Clostridium butyricum VPI 1718". Biotechnology and Bioengineering 107, n. 1 (16 aprile 2010): 76–84. http://dx.doi.org/10.1002/bit.22767.

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3

Purwani, Endang Yuli, Tresnawati Purwadaria e Maggy Thenawidjaja Suhartono. "Fermentation RS3 derived from sago and rice starch with Clostridium butyricum BCC B2571 or Eubacterium rectale DSM 17629". Anaerobe 18, n. 1 (febbraio 2012): 55–61. http://dx.doi.org/10.1016/j.anaerobe.2011.09.007.

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4

Chatzifragkou, Afroditi, Seraphim Papanikolaou, David Dietz, Agapi I. Doulgeraki, George-John E. Nychas e An-Ping Zeng. "Production of 1,3-propanediol by Clostridium butyricum growing on biodiesel-derived crude glycerol through a non-sterilized fermentation process". Applied Microbiology and Biotechnology 91, n. 1 (12 aprile 2011): 101–12. http://dx.doi.org/10.1007/s00253-011-3247-x.

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5

Li, Jiayi, Haokun Shen, Zengjue Zhao, Ding Cao, Min Zeng, Haiming Cai, Jiatian Wei et al. "Protective effects of Clostridium butyricum against oxidative stress induced by food processing and lipid-derived aldehydes in Caco-2 cells". Applied Microbiology and Biotechnology 104, n. 21 (23 settembre 2020): 9343–61. http://dx.doi.org/10.1007/s00253-020-10896-2.

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6

Poulet, Sylvie, Daniel Hauser, Martin Quanz, Heiner Niemann e Michel R. Popoff. "Sequences of the botulinal neurotoxin E derived from Clostridium botulinum type E (strain beluga) and Clostridium butyricum (strains ATCC 43181 and ATCC 43755)". Biochemical and Biophysical Research Communications 183, n. 1 (febbraio 1992): 107–13. http://dx.doi.org/10.1016/0006-291x(92)91615-w.

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7

Cremonesi, Paola, Laura Vanoni, Tiziana Silvetti, Stefano Morandi e Milena Brasca. "Identification ofClostridium beijerinckii, Cl. butyricum, Cl. sporogenes, Cl. tyrobutyricumisolated from silage, raw milk and hard cheese by a multiplex PCR assay". Journal of Dairy Research 79, n. 3 (5 luglio 2012): 318–23. http://dx.doi.org/10.1017/s002202991200026x.

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Abstract (sommario):
Late blowing, caused by the outgrowth of clostridial spores present in raw milk and originating from silage, can create considerable product loss, especially in the production of hard and semi-hard cheeses. The conventional method for the isolation ofClostridiumspp. from cheeses with late-blowing symptoms is very complicated and the identification of isolates is problematic. The aim of this work was the development of a multiplex PCR method for the detection of the main dairy-related clostridia such as:Cl. beijerinckii, Cl. butyricum, Cl. sporogenes, Cl. tyrobutyricum.Samples derived from silage, raw milk and hard cheese were analysed by the most probable number (MPN) enumeration. Forty-four bacterial strains isolated from gas positive tubes were used to check the reliability of the multiplex PCR assay. The specificity of the primers was tested by individually analysing each primer pair and the primer pair combined in the multiplex PCR. It was interesting to note that the samples not identified by the multiplex PCR assay were amplified by V2–V3 16S rRNA primer pair and the sequencing revealed the aligned 16S rRNA sequences to bePaenibacillusandBacillusspp. This new molecular assay provides a simple promising alternative to traditional microbiological methods for a rapid, sensitive detection of clostridia in dairy products.
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8

Greene, W. B., D. S. Raso, M. C. Willingham, R. M. Silver, A. S. Greene e J. A. Makeeff. "Silicon in rat knee joints after subcutaneous injection of dimethylpolysiloxane gel breast implant material". Proceedings, annual meeting, Electron Microscopy Society of America 52 (1994): 182–83. http://dx.doi.org/10.1017/s0424820100168645.

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Abstract (sommario):
Clinically, Electron Probe X-ray Microanalysis (EPMA) studies have detected elemental silicon (Si) in remote sites of chronic inflammation (skin, finger, knee and elbow) in patients who were previously implanted with a silicone polymer-filled breast augmentation prostheses. Subsequent biopsy material obtained from the fibrous tissue capsule surrounding the implant was found to contain abundant silicon in foamy macrophages. In the remote biopsies, the elemental silicon is believed to be derived from macrophages that originated in the connective tissue capsule.In order to study the possible cellular distribution of silicone in an animal model, 120gm female SD rats were injected subcutaneously at the nape of the neck with 2ml of breast prothesis silicone gel (1.7% of total body weight). The injection correlates to a 0.9kg silicone prostheses implanted in a 55kg human recipient. Adjuvant arthritis was produced after 8 weeks in Si injected and control animals by the subdermal injection of 0.75 mg of heat killed Mycobacterium butyrium (MB) over the left rear knee. Si injected only, Si plus MB, MB only and untreated control animals were sacrificed by Metofane inhalation at 16, 24 and 32 week intervals and tissues were processed for routine light microscopy and TEM. Decalcified knee joints were sectioned longitudinally and sent to JEOL USA, Inc. for blind, collaborative SEM x-ray microanalysis studies.
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9

Araki, Y., A. Andoh, Y. Fujiyama, J. Takizawa, W. Takizawa e T. Bamba. "Oral administration of a product derived from Clostridium butyricum in rats". International Journal of Molecular Medicine, 1 gennaio 2002. http://dx.doi.org/10.3892/ijmm.9.1.53.

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10

Araki, Y., A. Andoh, Y. Fujiyama, J. Takizawa, W. Takizawa e T. Bamba. "Short-term oral administration of a product derived from a probiotic, Clostridium butyricum induced no pathological effects in rats". International Journal of Molecular Medicine, 1 febbraio 2002. http://dx.doi.org/10.3892/ijmm.9.2.173.

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Tesi sul tema "Butyrique, derive"

1

SEFRAOUI, EL HOURINE. "Synthese et etude biologique de derives butyriques dans la serie des piperazines". Amiens, 1992. http://www.theses.fr/1992AMIEP047.

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2

PLACHON, PHILIPPE. "Modifications de la proliferation et de la differenciation de cellules mammaires humaines par de nouveaux derives butyriques stables". Amiens, 1991. http://www.theses.fr/1991AMIES009.

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Abstract (sommario):
Deux nouveaux derives esterifies de l'acide n-butyrique (les monobutyrates-3 et -6 monoacetoneglucose), elabores dans le but d'augmenter la demi-vie globale in vivo de cet acide, ont ete utilises pour l'etude de leurs effets sur plusieurs aspects du phenotype des cellules mammaires humaines. Quand elles sont traitees avec les esters butyriques, les cellules mammaires humaines se reorganisent et acquierent une forme rappelant leurs fonctions secretrices. Les esters butyriques inhibent la proliferation de toutes les cellules etudiees, ainsi que la clonogenicite de celles capables de former des colonies en agar. C'est dans la lignee exprimant les recepteurs aux strogenes que les effets les plus importants sont apparus. Les esters butyriques abaissent leur nombre sans modification de la constante d'affinite. De plus, un traitement avec ces esters s'est revele etre antagoniste des effets stimulateurs de l'stradiol. La modification de l'expression d'antigene de surface a ete aussi observee. Enfin, une reduction du pouvoir tumorigene chez la souris nude a ete demontre. Ces etudes montrent que la plupart des effets inhibiteurs de la proliferation et inducteurs de la differenciation de l'acide n-butyrique, se retrouvent avec les derives esterifies de l'acide n-butyrique
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3

Toussaint, Olivier. "Décarboxylations cuprocatalysées : études mécanistiques et applications synthétiques". Paris 6, 1986. http://www.theses.fr/1986PA066075.

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Abstract (sommario):
Le rôle de chaque degré d'oxydation du cuivre (+1, +2, +3) impliqué dans ces processus est précisé. Les décarboxylations cuprocatalysées effectuées dans l'acétonitrile sont classées en deux types: la décarboxylation oxydante réalisée sous oxygène mettant en jeu le cuivre trivalent, la décarboxylation simple (ou réductive) réalisée sous atmosphère inerte en présence de dérivés cuivreux. Cette dernière réaction permet de décarboxyler quantitativement les acides maloniques à des températures <82c. Les hemi-esters maloniques racémiques sont décarboxylés en ester acétiques optiquement actifs en présence d'un inducteur chiral. La décarboxylation simple catalysée par les sels d'argent(i) est également décrite.
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