The using bear branch extract as potential corrosion inhibitor for copper in acid media

The paper investigates the corrosion inhibition property of the Bear Branch (Heracleum sphondylium) extract for copper in acid HNO3 solution. Potentiodynamic polarization and chronoamperometry techniques were used in this study in order to evaluate the inhibition efficiency of the proposed corrosion inhibitor in the mentioned solution. The Tafel plot method employed to determine value of the the corrosion current icorr as well as the corrosion rate. For a better simulation of the adsorption process of the extract on the metal surface, an equivalent circuit (EEC) has been modelled by using the data provided from the electrochemical impedance spectroscopy measurements. The possible interactions between the organic natural compounds molecules present in the extract of Heracleum sphondylium, have been evaluated by means of quantum chemical calculations and molecular modelling

PRELIMINARY CHROMATOGRAPHIC INVESTIGATION OF FOUR STACHYS SPP. (LAMIACEAE) FROM OLTENIA FLORA

Concerning four Stachys spp. (Lamiaceae) from the Oltenia flora, the paper highlights the polyphenolic content of aerial parts through high-performance thin-layer chromatography coupled with photodensitometry. Chlorogenic acid (CA) was identified and quantified in all 20% methanolic extracts of Stachydisherba. The highest CA amount was determined in S. recta (59.88 mg%), followed by S. sylvatica (32.90 mg%), S. officinalis (31.34 mg%), and S. germanica (25.16 mg%), respectively

HISTO-ANATOMICAL AND CHROMATOGRAPHIC RESEARCHES ON ZIZIPHORA CAPITATA L. (LAMIACEAE) SPECIES

Concerning Ziziphora capitata L. (Lamiaceae) species, the paper presents the histo-anatomical analysis of root, aboveground stem and leaf, along with the chromatographic investigations of the polyphenols in the aerial parts. Caffeic acid (126.2 μg/mL) and rutin (171.3 μg/mL) were identified in the 20% methanolic extract of Ziziphorae capitatae herba, by thin-layer chromatography coupled with photodensitometry

HISTO-ANATOMICAL AND PRELIMINARY TLC INVESTIGATIONS ON CYNOGLOSSUM OFFICINALE L. (BORAGINACEAE) SPECIES

The cross-sections through root, aboveground stem, leaf and sepal of Cynoglossum officinale L. species, Boraginaceae family, harvested from the geographical area of Valea Cernei, Valcea County (Romania), were obtained and interpreted using microphotography technique. In addition, the polyphenols content of the aerial parts (Cynoglossi herba) was analyzed by thin layer chromatography and established for the reason of pharmacognostic expertise. One caffeic acid derivative was identified from the 15 distinctive chromatographic bands

HISTO-ANATOMICAL AND PRELIMINARY TLC INVESTIGATIONS ON HYPERICUM HIRSUTUM L. (HYPERICACEAE) SPECIES

Starting from Hypericum hirsutum L. plants in blossom, harvested in May 2016, from Rasca Forest, Olt County (Romania), the cross-sections of root, aboveground stem and leaf were acquired and examined through microphotography technique. Also, the content of polyphenols was determined by thin layer chromatography as part of a comprehensive pharmacognostic analysis of aerial parts (Hyperici hirsuti herba). From the 12 separated chromatographic bands, one chlorogenic acid derivative was identified

HISTO-ANATOMICAL AND PRELIMINARY TLC INVESTIGATIONS ON TRIBULUS TERRESTRIS L. (ZYGOPHYLLACEAE) SPECIES

Using microphotography technique, the cross-sections of root, aboveground stem and leaf were obtained and investigated for Tribulus terrestris L. (Zygophyllaceae) plants in blossom, collected in June 2016, from the surroundings of Craiova City, Dolj County (southwestern Romania). The polyphenols content of the aerial parts (Tribuli herba) was analyzed by thin layer chromatography. One rutin derivative was identified starting from the 12 peculiar chromatographic bands

PRELIMINARY CHROMATOGRAPHICRESEARCH ON SOME SALVIA SPP. (LAMIACEAE)

Salvia genus, representative for the Lamiaceae family as it comprises approximately one thousand different species, is considered for a wide plethora of therapeutic actions, such as antioxidant, anti-inflammatory, hepatoprotective, antitumoral and antidiabetic activity. The paper presents the preliminary chromatographic investigations of the polyphenols in the aerial parts of some Salvia spp. Using high-performance thin-layer chromatography (HPTLC) coupled with photodensitometry, caffeic acid was identified and quantified in the 20% methanolic extracts of Salviaeherba, in descending order, as follows: S. nemorosa (3.096%) > S. verticillata (3.041%) > S. sclarea (2.663%) > S. glutinosa (1.962%) > S. aethiopis (0.926%)

HISTO-ANATOMICAL AND CHROMATOGRAPHIC RESEARCHES ON CAMPANULA PERSICIFOLIA L. (CAMPANULACEAE) SPECIES

The paper presents the histo-anatomical researches on root, rhizome, aboveground stem and leaf of Campanula persicifolia L. (Campanulaceae) species, together with the thin-layer chromatography analysis of the polyphenols content of Campanulae persicifoliae herba. Chlorogenic acid (108.6 μg/mL) was identified in the 20% methanolic extract of the aerial parts

Impact on the growth parameters and microbial populations of probiotics and prebiotics on rabbits raised in the household system

The investigations and laboratory determinations were performed within the disciplines of Nutrition and Microbiology of the University of Agricultural Sciences and Veterinary Medicine Cluj-Napoca. The breeding of rabbits and the collection of samples took place in the own household from Sărata locality, Bistrița-Năsăud county. The aim of this study was to demonstrate the impact of the use of probiotics and prebiotics in feeding rabbits raised in the household system. For this experiment, 12 rabbits, common breed, 55 days old, raised in the household system were used. The basic feed ration was a commercial concentrated, ground feed in which the probiotic (Enteroferm® 35G), 0.15 g / kg feed, containing cultures of Enterococcus faecium, the prebiotic (Inulin FOS, ZENYTH), were incorporated, 25 g / kg fodder, powder obtained from chicory root (Cichorium intybus), which contains polysaccharides with a prebiotic role (inulin and fructooligosaccharide - FOS) and a synbiotic (mixture of the two), in the same doses. There were 4 groups of 3 individuals as follows: group number 1, control, group number 2, probiotic, group number 3, prebiotic and group number 4, synbiotic. In addition to the concentrated feed, good quality natural hay and water were added, both the feed and the water were administered ad libitum. In order to achieve the proposed goal, the amount of feed consumed by each group and the weight of each rabbit were determined weekly for 8 weeks. Based on these data, the final average weight of each group, the total feed consumption of each group, the weekly weight increase for each group, the average weekly and final feed conversion rate were calculated. Samples were also collected from the rectum, before and after treatment with probiotics and prebiotics, to determine their impact on the composition of the bacterial flora at this level. The determinations performed yielded clearly superior results in favor of the experimental groups compared to the control group, highlighting group 2, consisting of rabbits treated with probiotics