Aloe Arborescens Mill Research Articles

Biochar enhances root development and aloin content of mature leaves in containerized Aloe arborescens Mill.

The leaves of the medicinal plant Aloe arborescens Mill. (Asphodelaceae) contain significant amounts of bioactive metabolites, including aloin (a mixture of the two diastereoisomers, aloin A and aloin B), aloesin, isoaloeresin D, and aloenin A. The presence of these metabolites varies considerably depending on the plant's growth conditions, including the used growing substrate. In recent years, there has been growing interest in using biochar for potted plants cultivation. However, there is currently no available information regarding the suitability of biochar for the containerized cultivation of A. arborescens. A pot experiment was conducted with the hypothesis that biochar could influence the growth and phytochemistry of A. arborescens. The growing medium was supplied with increasing proportions of biochar (1: 100 % commercial substrate; 2: mixed 50 % (v/v) substrate; 3: 100 % conifers wood biochar). Over the course of three years, the plants were closely monitored, and several key growth parameters were measured, including plant height, stem diameter, number and weight of leaves, and the number of suckers. After the first year, the content of selected active metabolites was assessed. This evaluation also involved a comparison of the respective levels in the leaves taken from the apical, median, and basal sections of the stem. The leaves collected from the median section of plants were found to be larger and exhibited the highest percentage of spikes, epidermis, and gel on fresh weight. As a general trend, it was observed that in plants cultivated within the highest amount of biochar, the leaves collected from the intermediate stem portion contained the highest quantity of secondary metabolites.

Chemical Profile, Antioxidant and Antibacterial Activities, Mechanisms of Action of the Leaf Extract of Aloe arborescens Mill.

Aloe arborescens Mill's extracts have been explored for antibacterial and antioxidant efficacies. However, there is limited information on its chemical composition and mechanism of action. The purpose of this study was to assess the chemical composition, antibacterial and antioxidant activities and mechanism of the whole leaf extract of A. arborescens Mill. The phytochemical profile was analysed with gas chromatography mass spectrometry (GC-MS). The antioxidant and antibacterial activities were screened using 1,1diphenyl2picrylhydrazyl (DPPH), 2,2'-azino-bis(3-ethylbenzthiazoline-6-sulfonic acid) (ABTS) and micro-dilution assays, respectively. The effects of the extract on the bacterial respiratory chain dehydrogenase, membrane integrity and permeability were analysed using iodonitrotetrazolium chloride, 260 absorbing materials and relative electrical conductivity assays. GC-MS spectrum revealed 26 compounds with N,N'-trimethyleneurea (10.56%), xanthine (8.57%) and 4-hexyl-1-(7-ethoxycarbonylheptyl)bicyclo[4.4.0]deca-2,5,7-triene (7.10%), being the major components. The extract also exhibited antioxidant activity with median concentration (IC50) values of 0.65 mg/mL on DPPH and 0.052 mg/mL on ABTS. The extract exhibited minimum inhibitory concentration (MIC) values ranging from 0.07 to 1.13 mg/mL. The extract inhibited the bacterial growth by destructing the activity of the respiratory chain dehydrogenase, membrane integrity and permeability. Therefore, the leaf extract has the potential to serve as a source of antibacterial and antioxidant compounds.

Hydrolate and EO Application to Reduce Decay of Carica papaya during Storage

Postharvest fruit loss is caused by the absence of advanced handling and storage technologies and the quiescent presence of fungal pathogens. Therefore, there is a growing demand for sustainable decisions for the planet. This study focused on the use of two types of edible coatings: one was based on the essential oil of Origanum vulgare L. subsp. viridulum with Aloe arborescens Mill. gel (EC1), and the other was based on the hydrolate only (EC2). These treatments were applied to provide defense against fungal infections in papaya (Carica papaya L. cv Solo), and the storage time was 25 days (T5 ± 1 °C). Fruits coated with EC1 were more contaminated with fungal pathogens than both control (CTR) and EC2 fruit. EC2 showed a statistically lower decay index than CTR and EC1 and maintained its organoleptic characteristics better, showing a 15% loss of firmness after 25 days of storage. Furthermore, the lowest decay index (1.14 after 25 days) was found for the EC1 and CTR. These findings suggest that the use of hydrolate can be useful for extending the shelf life and maintaining the quality of papaya fruit, representing an alternative to the use of synthetic fungicides for food safety.

Study of the Effect of a Complex of Preparations Containing Aloe Arborescens Mill Extract on the Quality and Quantity of Sperm

Study of the Effect of a Complex of Preparations Containing Aloe Arborescens Mill Extract on the Quality and Quantity of Sperm

Inhibitory Efficiency and Physicochemical Properties of Lipids from Leaves and Juice of Aloe arborescens Mill.

Inhibitory Efficiency and Physicochemical Properties of Lipids from Leaves and Juice of Aloe arborescens Mill.

Drying-off dairy cows without antibiotic therapy and orally supplemented with lyophilized Aloe arborescens: effects on rumen activity, immunometabolic profile, and milk yield.

The drying-off is a stressful stage of the lactation cycle of dairy cows that deeply affects cows' metabolism, inflammatory status, and immune system. The promising effects observed during the transition period resulting from supplementation with Aloe arborescens Mill. suggest its potential utility during this phase. A group of 23 Holstein dairy cows with somatic cell count (SCC) less than 200 × 103 cells/ml and without intramammary infections were enroled in the study. Cows were divided into two groups: one orally receiving 10 g/day of A. arborescens Mill. lyophilized powder (AL; 11 cows) between -7 and 7 days from dry-off (DFD), and a control group (CTR; 12 cows). From -14 to 7 DFD and 7 and 28 days from calving, the body condition score and rectal temperature were determined, and rumen fluid, feces, milk, and blood samples were collected. Daily rumination times and milk yield were recorded. Data were analyzed through repeated measures mixed models. Compared to the CTR group, AL cows tended to show reduced production of volatile fatty acids in the rumen with acetate proportion that tended to be higher and valerate proportion that was lower. Moreover, Aloe supplementation caused a reduction in fecal dry matter. At the end of drying-off, AL cows presented better liver function, as suggested by higher paraoxonase plasma concentrations at 7 DFD, higher glucose, and lower urea, but showed increased reactive oxygen metabolites. Aloe supplementation at dry-off ameliorated inflammatory status after calving (lower haptoglobin and ceruloplasmin levels), and improved milk yield in the first weeks of subsequent lactation, without influencing milk composition, SCC, and incidence of intramammary infections. These results confirmed the positive effects of Aloe administration on liver function in dairy cows but indicate the need for further studies investigating the effects of Aloe on rumen fermentation profile and oxidative status.

Improvement of Methods for Standardisation of Medicines Based on Aloe arborescens

Much interest is taken in identification of Aloe arborescens Mill. medicines by a major class of bioactive compounds (anthracene derivatives), as well as in quantitative determination of the compounds belonging to the class, with the same unified method for the entire spectrum from herbal drugs to herbal medicinal products. The aim of the study was to develop a methodological approach and select unified conditions for the identification and assay of anthracene-derived compounds in herbal drugs, herbal drug preparations and herbal medicinal products of Aloe arborescens Mill., observing the principle of holistic, end-to-end standardisation. Materials and methods : analytical conditions were unified using literature data and a comparison of reference values and requirements of the Russian and other pharmacopoeias. The subsequent practical evaluation of the selected conditions used three batches of the herbal medicinal product “Aloe Juice” by Vifitech (batches 131217, 030318 and 070618). The identification was carried out using a silica gel plate for high-performance thin-layer chromatography (HPTLC Silica Gel 60 HX85224933 1056330001 by Merck). The results were examined in daylight before and after spraying with a 2% alcohol solution of sodium hydroxide. The quantification was carried out using a Cary-100 spectrophotometer by Agilent at 512 nm and 0.5% magnesium acetate in methanol as a developing solvent. Results : the authors developed a unified approach to identification and quantification of anthracene-derived compounds in herbal drugs, herbal drug preparations and herbal medicinal products of Aloe arborescens Mill. and suggested using aloe-emodin as a reference standard. The authors established reference values for anthracene-derived compounds in herbal drugs, herbal drug preparations and herbal medicinal products of Aloe arborescens Mill. and drafted the corresponding monographs for the State Pharmacopoeia of the Russian Federation. Conclusions : the developed procedures allow for comprehensive identification and quantification of anthracene-derived compounds in herbal drugs, herbal drug preparations and herbal medicinal products of Aloe arborescens Mill. by the same class of biologically active compounds.

The activity of Aloe arborescens Miller varieties on wound-associated pathogens, wound healing and growth factor production

Various Aloe L. species have been used worldwide to soothe and treat dermal wounds and burns. However, there is a lack of substantiative research on the efficacy of Aloe L. species for wound healing. The aim of this study was to investigate the differences in biological activities of the gel and ethanolic (EtOH) leaf extracts of seven Aloe arborescens Miller varieties. The extracts were investigated for their antibacterial activity against wound-associated bacteria, Staphylococcus aureus (ATCC 6538 and ATCC 25293) and Pseudomonas aeruginosa (ATCC 9027), as well as their nitric oxide (NO) scavenging potential. Varieties with antibacterial activity were further evaluated for wound closure and growth factor stimulation in human keratinocytes (HaCaT). The EtOH leaf extract of the ‘Eloff’ and ‘Jack Marais’ varieties displayed antibacterial activity against S. aureus ATCC 25293 (MIC of 500 and 250 μg/mL, respectively). The EtOH leaf extract of ‘Jack Marais’ displayed an MIC of 500 μg/mL against S. aureus ATCC 6538. The gel extract of ‘Le Roux’ exhibited antioxidant activity with a half maximal inhibitory concentration (IC50 of 2696 ± 582.66 μg/mL). The EtOH leaf extracts of ‘Eloff’ and ‘Jack Marais’ showed significant (p < 0.05) wound closure of 56.06 ± 1.47 and 73.72 ± 0.65%, respectively at 50 μg/mL and the ‘Jack Marais’ gel extract significantly stimulated wound closure (p < 0.05) by 77.02 ± 1.97 and 71.51 ± 1.11% at 50 and 100 μg/mL, respectively. Both the ‘Jack Marais’ gel extract (at 50 and 100 μg/mL) and the EtOH leaf extract (50 μg/mL), significantly (p < 0.05) increased platelet-derived growth factor (PDGF-AA) secretion to 601.09 ± 97.77, 1035.00 ± 913.98 and 559.43 ± 112.52 pg/mL, respectively. The ‘Jack Marais’ EtOH leaf extract exhibited the highest antibacterial activity, whereas the gel extract displayed the greatest potential to stimulate wound closure. This not only suggests a difference in biological activity among varieties but also between the type of extract (gel or leaf).

A New Nothospecies, Aloe ×thammii Gideon F.Sm. (Asphodelaceae Subfam. Alooideae), Based on the Natural Hybrid between A. arborescens Mill. and A. thraskii Baker from the Eastern Parts of the Eastern Cape Province, South Africa

The natural hybrid between Aloe arborescens Mill. and A. thraskii Baker (Asphodelaceae subfam. Alooideae) from the eastern coastal parts of the Eastern Cape province of South Africa where the natural geographical distribution ranges of these two species overlap, is described as Aloe ×thammii Gideon F.Sm.

THE DEVELOPMENT OF METHODS FOR DETERMINATION THE TOTAL OF ANTHRACENE DERIVATIVES IN RAW MATERIALS AND PREPARATIONS OF ALOE ARBORESCENS MILL.

Aloe arborescens Mill., family Asphodelaceae, is a pharmacopoeial plant, the raw material of which is used for the production of medicinal products for various therapeutic uses. The standardization of Aloe species in accordance with the requirements of the British, Japanese, European Pharmacopoeias and the United States Pharmacopoeia is carried out according to the barbaloin content by the spectrophotometric method. The methods are multistage, provide for preliminary acid hydrolysis in combination with the oxidation, liquid-liquid extraction of the formed aglycones and subsequent complexation with magnesium acetate. A mixture of isomers of aloin A and aloin B (barbaloin) and aloenin were isolated by chromatographic methods. It was determined that in all electronic spectra of the extracts and preparations from the leaves of Aloe arborescens Mill., a bathochromic shift of the long-wavelength band in the alkaline-ammonia solution is observed, which confirms the presence of anthracene derivatives. Under conditions of differential absorption, a maximum absorption is observed in the range of 412–416 nm, which indicates the advisability of using barbaloin in the analysis method, which has a maximum absorption at a wavelength of 412 nm. As a result of the study, there were developed methods for the quantitative determination of the total of anthracene derivatives in leaves and preparations of Aloe arborescens Mill. by using of the differential spectrophotometry calculated on barbaloin at an analytical wavelength of 412 nm. The content of total anthracene derivatives calculated on barbaloin was 0.60±0.03% in Aloe arborescens fresh leaves, 0.5±0.02% in freshly prepared juice, 0.135±0.006% in "Aloe juice" and 0.020±0.001% in "Aloe liquid extract", solution for subcutaneous administration, produced by ZAO "Vifitech" and OAO "Dalkhimpharm".

HPLC Determination of Aloenin in Leaves and Preparations of Aloe arborescens Mill.

HPLC Determination of Aloenin in Leaves and Preparations of Aloe arborescens Mill.

The current issues of standardization of &lt;i&gt;Aloe arborescens&lt;/i&gt; Mill. leaves

BACKGROUND: Aloe arborescens Mill. leaves contain a whole complex of biologically active compounds (derivatives of anthraquinone, anthrone, pyrone, biopolymers, etc.) and are widely used in medical practice as raw materials for the production of anti-inflammatory, wound healing agents. The presence of anthracene derivatives in the leaves determines the laxative activity of raw plant materials and preparations. It emphasizes the importance of Aloe arborescens preparations for internal use in inflammatory diseases accompanied by constipation and decrease in secretory activity. Another biologically active compound with which the anti-inflammatory activity of aloe leaves may be associated with a pyrone derivative aloenin. At the same time, despite the widespread use in medicine and a well-studied chemical composition, the problems in the field of standardization of raw materials and preparations of Aloe arborescens are still urgent. The methods for determining the quantitative content of anthracene derivatives described in the literature are multistage, they provide for preliminary acid hydrolysis in combination with oxidation, liquid-liquid extraction of the formed aglycones and complexation with magnesium acetate. The approved regulatory documents for aloe raw materials and preparations does not provide for the assay of aloenin&#x0D; AIM: The aim is to develop the methods for determining the quantitative content of biologically active compounds in the raw materials and preparations of fresh leaves of Aloe arborescens by using the spectrophotometric method and the high-performance liquid chromatography method.&#x0D; MATERIALS AND METHODS: The objects of research were fresh leaves of Aloe arborescens Mill., and juice obtained ex tempore from fresh leaves of aloe. Samples of raw materials were collected in the summer and autumn of 2020 in the Winter Garden of the Department of Pharmacognosy with Botany and Bases of Phytotherapy at Samara State Medical University. Individual substances were isolated by column chromatography. In the study, the Bruker DRX 500 instrument (126.76 MHz) was used to determine 13C NMR spectra, and the Bruker AM 300 instrument (300 MHz) was used to determine 1H NMR spectra. Mass spectra were recorded on mass spectrometer Kratos MS-30, UV spectra were recorded by means of the spectrophotometer Specord 40 (Analytik Jena). High-performance liquid chromatography analysis was carried out with the use of the chromatograph Milichrom-6 (Nauchpribor, Russia).&#x0D; RESULTS: As a result of the study, aloenin and a mixture of aloins A and B (barbaloin) were isolated from the leaves of Aloe arborescens by with the use of column chromatography. The method for the determination of the quantitative content of aloenin by microcolumn reversed-phase high-performance liquid chromatography with UV detection (306 nm) was developed, the mobile phase was acetonitrile: 1% acetic acid solution in water in the ratio of 25:75, the elution rate is 100 L / min. The method for the quantitative determination of the total amount of anthracene derivatives in Aloe arborescens fresh leaves (differential spectrophotometry with an alkaline-ammonia solution at 412 nm) was developed. The optimal conditions for the extraction were selected. They are extractant of 40% ethyl alcohol, extraction within 60 minutes at the ratio of raw material extractant is 1:50. Validation analysis has shown that the developed methods are characterized by satisfactory metrological indicators.&#x0D; CONCLUSIONS: The obtained results can be used to update the pharmacopoeial monograph Aloe arborescens leaves fresh.

Aloe arborescens Mill. ‘Estelle Potgieter’ (Asphodelaceae subfam. Alooideae), a new cultivar in a variable species, with notes on aloes at the South African National Biodiversity Institute, Pretoria

Aloe arborescens Mill. ‘Estelle Potgieter’ (Asphodelaceae subfam. Alooideae), a new cultivar, is established in this variable species. Aloes at the South African National Biodiversity Institute, Pretoria, South Africa, are discussed.

Increased illumination levels enhance biosynthesis of aloenin A and aloin B in Aloe arborescens Mill., but lower their per-plant yield

Leaves of Aloe arborescens Mill. are a relevant source of secondary metabolites of pharmaceutical relevance. Notwithstanding, specialized cultivations of A. arborescens are still rather limited, and a straightforward agronomical research addressed to the obtainment of high-quality material is lacking. With the purpose to fill this gap, from 2016 to 2018, a trial was arranged to evaluate the growth and development of A. arborescens, along with the production of four active metabolites (aloin A and B, aloenin A, and isoaloeresin D) with varying some growth conditions. Two growth substrates (“A”- a commercial substrate, and “B”- the same substrate + 20 % perlite), two durations of pre-transplant open-air storage (“stress”, 7 and 14 days), and 3 illumination levels obtained by means of shadow nets with different mesh dimensions (SL: full sunlight; T50: 50 % shading; T70: 70 % shading) were tested, combined in a factorial experimental layout with 3 repetitions. In general, light intensity was the most crucial experimental factor, whereas the effects of growth substrate and pre-transplant stress were scarce and limited in time. The addition of perlite to the growth substrate gave the best results in terms of leaf size and root growth, without any significant effect on the yield of active metabolites. The increasing shading level caused a parallel increase of several biometrical characters of plants (height, number of leaves per plant and mean diameter of the stem), whereas the number of suckers per plant was positively affected by the increase of illumination level. The illumination level was also responsible for significant variations in the content of all secondary metabolites, except for aloin A, that resulted statistically not different among the illumination treatments (from 0.80 to 0.98 % in dry matter). The content of aloenin A and aloin B was higher in the plants exposed in full sun, statistically well differentiated from those exposed to 70 % shadow (2.0 vs. 1.4 % d.m. aloenin A, and 1.12 vs 0.86 % d.m. aloin B, in full sun and 70 % shadow, respectively). Contrastingly, the highest levels of isoaloeresin D were reached in the two shaded treatments (4.98 % in 50 % shadow and 4.89 % in 70 % shadow), whereas the full sun treatment reached the lowest value. The higher number of leaves in plants exposed at reduced illumination, however, brought to increased total amounts per plant of aloin (A and B) and aloenin A with increasing shadow levels.

In vivo immuno - and angiomodulatory effects of Aloe arborescens folii recentis extractum siccum (AAES) in mice

Abstract Introduction AAES is a powdered form of Biostymina, herbal medicinal product of Phytopharm Klęka S.A., a water extract of Aloe arborescens Mill. leaves. Aloe arborescens Mill. (woody aloe, tree-like aloe) is known to have several traditional medicinal properties including anti-inflammatory, immunomodulatory, antiviral and antimicrobial activity. Objective The aim of this work was to study the in vivo effect of AAES on cellular (leukocyte-induced cutaneous angiogenesis, LIA test, and proliferative response to PHA) and humoral (anti-SRBC antibody response) immunity in mice. Methods Balb/c mice were fed AAES from 0.5 to 75 mg/kg body mass for seven days before grafting their splenocytes intradermally to F1 (Balb/cxC3H) recipients (LIA test). Neovascular reaction was evaluated 72 h later in dissection microscope. Spleen cell cultures were incubated with 0.5, 1 and 2 μg/ml of PHA. After 48 h of incubation, tritiated thymidine was added. After further 24 h, cells were harvested (Skatron) and incorporation of tritiated thymidine was measured using Beta-scintillation counter. Balb/c mice were fed for 7 days with AAES, then immunized intraperitoneally with 5% SRBC suspension and 7 days later the antibody response was measured with hemagglutination test. Results Neovascular reaction was significantly higher in groups grafted with splenocytes collected from all AAES fed donors than from the controls. The proliferation of splenocytes taken from mice fed AAES at doses ranging from 0.5 mg/kg to 7.5 mg/kg was stimulated in all cultures. Suppression of proliferation was observed in cell cultures derived from mice fed with higher doses of AAES. Stimulation of anti-SRBC antibody production was seen in mice fed both 2.5 and 7.5 mg/kg dose of AAES. Conclusion Powdered form of Biostymina (AAES) might be useful in the treatment of patients with ischaemia of tissues and organs (myocardial infarction, stroke, necrosis) and in deficiency in the production of immune cells and growth factors (infections, chronic wound healing, ulceration and bone fusion).

The aloes of Friedrich Wilms: notes on Aloe wilmsii Diels ex Hausen, A. affinis A.Berger, and A. cinnabarina Diels ex A.Berger (Asphodelaceae subfam. Alooideae), with a biographical sketch of Wilms

Collections of Aloe L. (Asphodelaceae subfam. Alooideae) made by Friedrich Wilms (1848–1919) are analysed. The identity of material described as Aloe wilmsii Diels ex Hausen about 120 years ago is clarified. This long-overlooked name belongs in the synonymy of Aloe arborescens Mill. The original specimens, also collected by Wilms, on which the names A. affinis A.Berger and A. cinnabarina Diels ex A.Berger are based, are discussed. Lectotypes are designated for A. wilmsii, A. affinis, and A. cinnabarina. Biographical information is provided on Wilms who is commemorated in the specific epithet of Aloe wilmsii.

Effects of Aloe arborescens Whole Plant Homogenate on Lipid Metabolism, Inflammatory Conditions and Liver Function of Dairy Cows during the Transition Period.

Simple SummaryThis study highlights the positive effect of an Aloe arborescens Mill. whole plant homogenate on the liver and renal function of dairy cows during the peripartum period. Such positive effects could depend on both anti-hyperlipidemic and anti-inflammatory effects of Aloe that could have mitigated hepatic stresses that typically occur in early lactation. Our findings suggest Aloe arborescens supplementation to be an effective strategy to ameliorate adverse metabolic conditions in transition cows, indicating it as a preventive nutraceutical strategy against metabolic disorders.The anti-hyperlipidemic and anti-inflammatory effects exerted by Aloe on monogastric mammals suggest it as a potential strategy to address the tremendous metabolic alterations that affect dairy cows during their transition to calving. A group of 20 multiparous Italian Holstein dairy cows were housed in freestalls and allocated into two homogeneous groups to receive either 200 g/d of water (CTR) or 200 g/day of Aloe arborescens Mill. whole plant homogenate through a rumen tube (AAM) between −14 and 14 days from calving (DFC). From −14 to 35 DFC, the BCS, and milk yield were measured, and blood samples were collected to assess the hematochemical profile. Data underwent ANOVA testing using a mixed model for repeated measurements, including the treatment and time and their interactions as fixed effects. Compared to CTR cows, AAM cows had a less pronounced BCS loss in early lactation (p < 0.01), indicating less mobilization of body reserves. Compared to CTR cows, AAM cows had a lower plasma concentration of nonesterified fatty acids and beta hydroxybutyrate (p < 0.01 and = 0.01 respectively) that, paired with the lower butterfat content and fat/protein ratio in their milk (p = 0.03 and < 0.01 respectively), indicates that Aloe reduced the mobilization of body fats. AAM cows had a reduced concentration of myeloperoxidase in plasma and a lower SCC in milk compared to CTR cows (p = 0.02 for both), indicating an anti-inflammatory effect of Aloe. Furthermore, AAM cows had a lower plasma concentration of ceruloplasmin (p < 0.05) and higher plasma concentration of cholesterol, retinol, and paraoxonase compared to CTR cows (p < 0.01, < 0.01 and < 0.05 respectively), indicating Aloe was effective in mitigating the acute phase response in early lactation. Finally, AAM cows had lower plasma creatinine concentrations around calving (p < 0.05), a lower concentration of plasma bilirubin, and a higher concentration of plasma tocopherol compared to CTR cows (p = 0.01 for both). These data suggest Aloe has anti-hyperlipidemic and anti-inflammatory effects on transition dairy cows that could have ameliorated liver and kidney function disruption and increased the availability of body antioxidants in early lactation.

STUDY OF ANTIBACTERIAL PROPERTIES OF A NEW DEVELOP DENTAL DRUG «DENTA ALOE»

The variety of clinical forms of stomatitis and a large number of etiological factors and pathogenetic chains of the development of inflammatory and dystrophic diseases in the oral mucosa actualize the problem of prevention and treatment of stomatitis for a practical solution. The multifactorial nature of the development of the disease, the chronization of the process, difficulties in achieving positive results of complex treatment, the emergence of resistant forms of microorganisms require the creation of new drugs for the local treatment of lesions of the oral mucosa. A promising direction is considered to be the development of medicines for the treatment of oral diseases based on medicinal plants, in particular Aloe arborescens mill. This article presents the results of studying the antimicrobial activity of the drug «Dent Aloe». This article discusses the characteristics of the sensitivity of microbes to the newly created drug «Dent Aloe» in vitro.

Aloe ×caesia Salm-Dyck (Asphodelaceae) is the correct name of the common hybrid aloe [Aloe arborescens Mill. × A. ferox Mill.] from the southern Cape, South Africa

Several names have been published for the common and horticulturally popular hybrid between Aloe arborescens Mill. and A. ferox Mill. (Asphodelaceae). Although inevitably a variable entity given its hybrid origin, this nothospecies can generally be recognised by being a strongly rosulate, multi-stemmed, robust shrub with glaucous to dark green leaves that are very much intermediate between those of A. arborescens and A. ferox. Plants are very floriferous with flower colour ranging from orange to red. The taxonomy and nomenclature of this nothospecies that has been known since the early 1700s, but was only described more than 100 years later, is reviewed. It is shown that the correct name to apply to it is Aloe ×caesia Salm-Dyck. The following names are typified here: Aloe africana Salm-Dyck non Mill., Aloe ×fulgens Tod., Aloe ×principis (Haw.) Stearn, Aloe ×salm-dyckiana Schult. & Schult.f., and Pachidendron ×principis Haw.

Simultaneous qualitative and quantitative determination of compounds in Aloe arborescens Mill using liquid chromatography with ion trap time‐of‐flight mass spectrometry and diode array detectors

AbstractAn effective and comprehensive method was developed for the simultaneous analysis of compounds in the powder of Aloe arborescens Mill by liquid chromatography with ion trap time‐of‐flight mass spectrometry and high‐performance liquid chromatography with diode array detection. Qualitative analysis of all the compounds presented in Aloe arborescens Mill was performed by liquid chromatography with ion trap time‐of‐flight mass spectrometry. A total of 28 components from Aloe arborescens Mill were identified, including chromones, phenyl pyrones, anthrones and anthraquinones. The quantitative analysis of multi‐components by a single‐marker method was developed and validated for the simultaneous determination of aloenin, 2′‐α‐rhamnopyranosylisovitexin, aloinA, and aloinB in Aloe arborescens Mill leaves using high‐performance liquid chromatography. We can than calculate the contents of the other constituents with the relative correction factors correspondingly. In comparison with the results obtained using the external standard method, the quantitative analysis of multi‐components by the single‐marker method demonstrates no significant difference. This is the first simultaneous characterization and quantitative determination of multiple compounds in Aloe arborescens Mill. It can be applied to standardize the quality of Aloe arborescens Mill as well as the future design of nutraceutical and cosmetic preparations.