Chemical composition and antimicrobial activity of essential oils from six lavender (Lavandula angustifolia Mill.) cultivars

The present study aimed to determine the chemical composition and in vitro antimicrobial potential for the first time of essential oils (EOs) from six cultivars (Druzhba, Raya, Hebar, Hemus, Yubileina, Sevtapolis) of lavender (Lavandula angustifolia Mill.) cultivated in Türkiye (Tekirdağ) against a panel of pathogenic and non-pathogenic microorganisms. The chemical composition of EOs, analysed using gas chromatography/mass spectrometry (GC/MS), revealed 34 different components in the six cultivars. The results indicate that the main major constituents of all EOs were monoterpenoid linalool (47.60-64.13%) and linalyl acetate (12.92-26.08%). Based on principal component analysis (PCA) cvs. Druzhba, Raya and Hebar were situated in the centre right quadrant of the plot and were characterised by linalool and linalyl acetate in subgroup one. The results of antimicrobial assays revealed that lavender EOs were active against all strains of bacteria tested. For bacteria, the strongest activity of cv. Hemus was observed against Enterococcus faecalis (IZ = 19 ± 0.10 mm, MIC = MMC = 6.25 (µg/mL), while the weakest potency was seen against the gram-negative Salmonella enterica (IZ = 21 ± 1.00 mm, MIC = MMC = 31.25 (µg/mL). Based on PCA, the first subgroup of cvs. Hebar and Raya was characterised by Lactobacillus rhamnosus, E. faecalis and Lactobacillus pentosus and was situated in the bottom right quadrant of the plot

The effect of irrigation treatments at different development stages on the bioactive components of sunflower cake

The aim of the study was to determine the effect of water deficiency at different development stages on the bioactive content and phenolic compounds in sunflower (Helianthus annuus L.) cake, the residue left after oil is extracted from sunflower seeds. A sunflower genotype was randomly planted in a complete block design with eight different combinations of irrigation (T1-T8) by increasing the available soil moisture measured at different plant growth stages (vegetative, flowering and grain formation). Results indicated that the total phenolics of extracts varied between 1.03-2.03 times more than under drought stress (T8). The antioxidant capacity response of seed cake was 14-39% lower than under drought stress. Irrigation treatment, except in the grain formation stage, was found to enhance the biosynthesis of phenolic compounds such as vanillic and caffeic acids. Irrigation only in the grain formation stage induced the accumulation of phenolic compounds such as coumaric acid and rutin hydrate. The present study established that residues resulting from oil extraction could be converted to a polyphenol-enrichment agent for food systems by manipulating the irrigation treatments

Efficacy of peloidotherapy in patients with subacromial impingement syndrome

Çalışmamızın temel amacı subakromiyal sıkışma sendromunda evde uygulanan ve hastanede uygulanan peloidoterapinin etkinliği araştırmaktır. Tek taraflı omzunda subakromiyal sıkışma sendromu tanısı almış olan 73 kadın hasta çalışmaya alındı. Hastalar tedavi grubu (n=42) ve kontrol grubu (n=31) olmak üzere iki farklı gruba ayrıldı. Tedavi grubundaki hastalara peloid tedavisi deriye direk temas olacak şekilde peloidoterapi ünitesinde uygulandı. Kontrol grubundaki hastalar ise peloidi evde kendi imkanlarıyla uyguladı. Her iki grup rutin medikal tedavilerine ve ev egzersiz programlarına devam ettiler. Değerlendirilmelerde hastaların omuz fonksiyonlarını değerlendirmek için DASH-T (Kol,omuz ve el yaralanması anketi) skorları, ağrı için VAS(Visuel Ağrı Skalası) ve genel durumları için sağlık değerlendirme anketi HAQ(Sağlık Değerlendirme Anketi) kullanıldı. Çalışma grubunda DASH ve HAQ skorları bakımından tedavi sonrasında tedavi öncesine göre anlamlı farklılık görülmemiştir (p>0.05). Yaptığımız çalışmada çalışma grubundaki peloidoterapi uygulamalarında kontrol grubundaki peloidoterapi uygulamalarına göre ağrı parametrelerinde daha olumlu sonuçlar elde edilmiştir. İleride yapılacak vaka sayısının arttırıldığı çalışmalara ihtiyaç vardır.The main purpose of our study is to investigate the efficacy of peloidotherapy applied at home in subacromial impingement syndrome and applied at the hospital. 73 female patients who were diagnosed with subacromial impingement syndrome were enrolled on one-sided shoulder. The patients were divided into two different groups, the treatment group (n = 42) and the control group (n = 31). Peloid therapy was performed in the Peloid therapy unit to direct contact with the skin in patients with treatment group. The patients in the control group applied the Peloid therapy at home with their own facilities. Both groups continued their routine medical treatment and home exercise programs. In the evaluation, DASH-T (Disabilities of the Arm, Shoulder and Hand) scores were used to assess the patient's shoulder functions..VAS (Visual Analogue Scale) was used for pain and health Assessment Questionnaire HAQ (Health Assessment Questionnaire) was used for general conditions.In the study group, in terms of DASH and HAQ scores, there was no significant difference after treatment (P > 0.05).In the study of Peloidotherapy in the study group, more positive results were obtained in pain parameters according to peloidotherapy applications in the control group. Studies are needed to increase the number of cases in the future

The use of plant secondary metabolites as food additives

European Biotechnology Congress -- MAY 16-18, 2013 -- Comenius Univ, Bratislava, SLOVAKIA[No Abstract Available]European Biotechnol Themat Network Assoc (EBTNA), Comenius Univ, Fac Nat Sc

Production of secondary metabolites by biotechnological methods

European Biotechnology Congress -- MAY 16-18, 2013 -- Comenius Univ, Bratislava, SLOVAKIA[No Abstract Available]European Biotechnol Themat Network Assoc (EBTNA), Comenius Univ, Fac Nat Sc

The use of plant secondary metabolites as food additives

European Biotechnology Congress -- MAY 16-18, 2013 -- Comenius Univ, Bratislava, SLOVAKIA[No Abstract Available]European Biotechnol Themat Network Assoc (EBTNA), Comenius Univ, Fac Nat Sc

Production of secondary metabolites by biotechnological methods

European Biotechnology Congress -- MAY 16-18, 2013 -- Comenius Univ, Bratislava, SLOVAKIA[No Abstract Available]European Biotechnol Themat Network Assoc (EBTNA), Comenius Univ, Fac Nat Sc

Silybum marianum L. TOHUMLARININ YAĞ ASİDİ KOMPOZİSYONU İLE TOHUM YAĞI VE SİLYMARİN EKSTRAKTININ ANTİMİKROBİYAL ETKİSİ

In this study, it was aimed to determine fatty acid profile and the antimicrobial activity of the seed oilobtained from the seed of Silybum marianum L. and silymarin which was extracted through methanolextraction of Silybum marianum L. seed. The antimicrobial activity of extracts was determined by testingagainst the microorganisms of Enterococcus faecalis, Staphylococcus aureus, Bacillus subtilis, Lactobacillus plantarum,Lactobacillus pentosus, Escherichia coli, Proteus mirabilis, Pseudomonas aeruginosa, and Candida albicans. GasChromatography-Mass Spectrometry was used to determine the fatty acid profile of the seed oil. The maincomponents of the seed oil were detected as octadecadienoic acid (44.06 %), octadecenoic acid (20.18 %),hexadecenoic acid (14.63 %) and octadecanoic acid (7.75 %). Seed oil revealed antimicrobial effect on P.mirabilis, P. aeruginosa and L. pentosus ELB41 and silymarin had antimicrobial effect on L. plantarum ELB75,L. pentosus ELB37 and B. subtilisBu çalışmada Meryemana dikeni (Silybum marianum L.) tohumlarından elde edilen tohum sabit yağı ile metanol ekstraksiyonuyla elde edilen silmarin etken maddesinin antimikrobiyal aktivitesinin belirlenmesi amaçlanmıştır. Ekstrelerin; Enterococcus faecalis, Staphylococcus aureus, Bacillus subtilis, Lactobacillus plantarum, Lactobacillus pentosus, Escherichia coli, Proteus mirabilis, Pseudomonas aeruginosa ve Candida albicans mikroorganizmalarına karşı antimikrobiyal aktiviteleri belirlenmiştir. Bununla birlikte bitki tohumlarından elde edilen yağın, yağ asitleri kompozisyonunun belirlenmesi için Gaz Kromatografisi-Kütle Spektrometresi (GC-MS) yöntemi kullanılmıştır. Yağın ana bileşenleri; oktadekadienoik asit (% 44.06), oktadekenoik asit (% 20.18), hekzadekanoik asit (% 14.63) ve oktadekanoik asit (% 7.75) olarak saptanmıştır. Çalışmamızda; tohum yağı ekstraktının P. mirabilis, P. aeruginosa ve Lactobacillus pentosus ELB41 üzerine; silmarinin ise Lactobacillus plantarum ELB75, Lactobacillus pentosus ELB37 ve B. subtilis’ e karşı antimikrobiyal etkisinin olduğu saptanmıştır

Evaluation of the phenolic content and antioxidant activity of sunflower seeds under deficit irrigation conditions

Abiotic stress like deficient irrigation might affect the synthesis of secondary metabolites in plants, which has several pharmacological effects. In this study, the effect of water deficit was determined on sunflower (Helianthus annuus L.) seed protein content, antioxidant activity, phenolic content and flavonoid and phenolic compounds of defatted seed extract for industrial usage. One sunflower genotype was planted in a field with six irrigation regimes (IR) under water deficit conditions that were set according to evaporation values measured during the 7-day irrigation interval (Kcp: 0, 0.25, 0.50, 0.75, 1.00 and 1.25) in a randomised complete block design. Results indicated that total phenolic content of seed extracts varied between 1.29-1.96 times higher than that under drought stress conditions (IR1). The antioxidant capacity of seed extracts was 7.82 (IR2) and 9.87% (IR4) higher than under drought stress conditions. The most abundant phenolic compounds that accumulated due to low water deficit (75%) were gallic acid and catechin. Based on principal component analysis, the biplot generated from PC1 and PC2 indicated that phenolic compounds in different irrigation regimes were collected under four subgroups. The drought stress conditions separated higher caffeic acid in a subgroup distant from the other irrigation regimes. © 2022, INNOVHUB - Stazioni Sperimentali per l'Industria S.r.l - Area Oli e Grassi. All rights reserved