scholarly journals Plant of Lamiaceae family for cultivation at the vertical hydroponic installation

2020 ◽  
pp. 72-75
Author(s):  
I. T. Balashova ◽  
L. V. Bespalko ◽  
A. V. Molchanova ◽  
E. V. Pinchuk ◽  
N. E. Maschenko
Keyword(s):  
Ascorbic Acid ◽  
Secondary Metabolites ◽  
Dry Matter ◽  
Matter Content ◽  
Leafy Vegetables ◽  
Dry Matter Content ◽  
Monarda Fistulosa ◽  
Vertical Farming ◽  
Content Determination

Relevance. Vertical farming – is a new and advanced direction in greenhouse vegetable cultivation. Expansion biodiversity of plants for vertical farming occur with help of green leafy vegetables. Plants of Lamiaceae family are well known as aromatic and medicinal plants with high content of substances with antioxidant activity. It allows use these plants as a base for the functional nutrition. Leafy parts the plants of Lamiaceae family may be used as aromatic and healthy additions to traditional foods, such as salads, soups and sauces.  Goal of the study: analysis the biochemical composition of leafy parts plants of Lamiaceaefamily, cultivated at the multi circle hydroponic construction. Materials and methods. 1) Plants: Monarda fistulosa L. (the breeding sample №5 U.P.), Monarda citriodora Cerv. ex Lag. (Simka variety), Melissa officinalisL. (Zhemchuzhina variety). 2) secondary metabolites: flavonoid glycoside linarozid and steroid glycoside moldstim. Methods. 1) cultivation of plants Lamiaceae family at the 5 circles hydroponic construction; 2) analytic methods: determination of dry matter content, determination of ascorbic acid content, determination sum of chlorophylls and carotenoids, determination sum of antioxidants; 3) statistical methods. Results. First experiment the cultivation of plants Lamiaceae family at the multi circle hydroponic construction was successful. Location of plants at different circles of hydroponic installation didn’t influence the content of dry matter, ascorbic acid and sum of chlorophylls in leafy parts of plants Monarda fistulosaL. The content of dry matter and sum of antioxidants in leafy parts of Monarda fistulosaL. plants of the first cutting is significantly higher than of other cuttings. So, we can recommend the leaves of Monarda fistulosa L. plants of the first cutting for the healthy additions in the scheme of the functional nutrition. Seed treatment with water solutions of secondary metabolites changed significantly the weight of leaves: it was increased in Monarda citriodoraCerv. ex Lag. and in Melissa officinalisL. 

scholarly journals Bioactive compounds in the aboveground part of hemiephemeroid onions (Allium L.)

2021 ◽  
Vol 181 (4) ◽  
pp. 37-43
Author(s):  
T. I. Fomina ◽  
T. A. Kukushkina
Keyword(s):  
Ascorbic Acid ◽  
Secondary Metabolites ◽  
Bioactive Compounds ◽  
Dry Matter ◽  
Matter Content ◽  
Raw Material ◽  
Dry Matter Content ◽  
High Biological Activity ◽  
Constant Weight ◽  
Total Sugars

Background. Representatives of the genus Allium L. are valuable food and medicinal plants that have long been used for nutrition and human health. Modern research has proved their high biological activity. Earlier, we investigated the aboveground organs of a number of wild onion species in the consumer ripeness phase. Higher content of secondary metabolites has been observed in the hemiephemeroid species A. aflatunense B. Fedtsch., A. microdictyon Prokh., and A. rosenbachianum Regel. The aim of this work was to determine the content of bioactive compounds in the green biomass of Allium species during flowering.Materials and methods. We studied the freshly harvested raw materials – leaves and flower scapes. Dry matter content was measured by drying 1 g of raw material at 100–105°C to constant weight. The amounts of phenolic compounds, pectic substances, total sugars and carotenoids were assessed spectrophotometrically using the SF-56 (Russia) and SF Agilent 8453 (USA) instruments, and ascorbic acid was measured by the titrimetric method. The result was taken as an average of three measurements for each indicator calculated on absolute dry weight of raw material (except ascorbic acid).Results and conclusions. The green biomass of Allium species was found to contain 8,2–16,2% of dry matter; 4,5–12,0% of phenolics (catechins, flavonols and tannins); 6,9–32,4% of total sugars; 9,5–12,6% of pectic compounds (pectins and protopectins); 20,8–102,5 mg% of carotenoids, and 38,0–197,7 mg% of ascorbic acid (wet weight). A significant range of variation in the content of secondary metabolites was due to the species’ characteristics and weather conditions of the growing season. A. microdictyon had a higher content of dry matter, flavonols and tannins, whereas A. aflatunense and A. rosenbachianum were rich in ascorbic acid and sugars. The findings testify to the prospects of using Allium spp. as a source of bioactive compounds. 

Key parameters in sludge dewatering: testing for the shear sensitivity and EPS content

2002 ◽  
Vol 46 (10) ◽  
pp. 105-114 ◽  
Author(s):  
L.H. Mikkelsen ◽  
T. Mascarenhas ◽  
P.H. Nielsen
Keyword(s):  
Laboratory Test ◽  
Dry Matter ◽  
Extracellular Polymeric Substances ◽  
Process Development ◽  
Matter Content ◽  
Dry Matter Content ◽  
Sludge Dewatering ◽  
Shear Sensitivity ◽  
Test Reactor

The fraction of extractable extracellular polymeric substances (EPS) and the shear sensitivity (kSS) are key parameters with respect to sludge dewatering, affecting the dry matter content of dewatered sludge and the dewatering rate and conditioner demand, respectively. Methods are described for determination of the two key parameters by use of the same laboratory test reactor. The implications of such characterisation with respect to dewatering are discussed based on examples of application to sludge processing and novel process development for sludge minimisation.

scholarly journals Post Harvest Assessment and Nutritional Evaluation of Different Cultivars of Taro (Colocasia esculenta L. Schott) Grown in the Alluvial Soils of West Bengal, India

2021 ◽  
pp. 1-9
Author(s):  
Manisha Ch. Momin ◽  
Alemmoa R. Jamir ◽  
Surajit Mitra
Keyword(s):  
Ascorbic Acid ◽  
Specific Gravity ◽  
Moisture Content ◽  
Dry Matter ◽  
West Bengal ◽  
Titratable Acidity ◽  
Matter Content ◽  
Reducing Sugar ◽  
Total Sugar ◽  
Dry Matter Content

Aims: The aim of the study was to evaluate the nutritional content of various cultivars of taro acquired from All India Co-ordinated Research Project (AICRP) on tuber crops. Study design:Completely randomized design (CRD) at 5% level of significance. Place and duration of study: Department of Post Harvest Technology, faculty of Horticulture, Bidhan Chandra KrishiViswavidyalaya, West Bengal, India, between December 2019 and February 2020. Methodology: 8 cultivars of taro were evaluated for their nutritional contents in this study and their physical attributes such as cormel girth, length, specific gravity, number of cormels per plant and weight of cormel as well as yield per hectare was calculated. Chemical attributes such as titratable acidity, starch, ascorbic acid, total phenol and total sugar as well as reducing sugar content in each cultivar was also studied. Results: Analysis of variance showed significant variation among all the tested cultivars. Moisture content, total sugar and starch was recorded to be highest in the cultivar TTR-17-6 (72.233 %, 5.007 % and 31.805 % respectively). Total phenol (188 mg GAE 100 gm-1) and reducing sugar (2.817%) was found to be highest in TTR-17-5. Total soluble solids was highest in TTR-17-7 (3.867 0Brix). Dry matter content was highest in TTR-17-4 (37.333 %) and ascorbic acid was highest in TTR-17-2 (70.093 mg 100 gm-1). Conclusion: The eight cultivars of taro studied were found to be rich in sugars, ascorbic acid, total phenols and starch. They were observed to vary in cormel girth, length, weight, specific gravity, yield, moisture, dry matter content, TSS and titratable acidity. The cultivar TTR-17-6 was found to be very high in starch, total sugar and moisture content. Therefore, this cultivar may be of considerable importance in ameliorating malnutrition in poorly resourced areas of the developing countries. Cultivar TTR-17-2 was found to be high in ascorbic acid and hence can be further used by the plant breeders to develop more cultivars of taro that are rich in such phytochemicals.

scholarly journals High Light Intensity Applied Shortly Before Harvest Improves Lettuce Nutritional Quality and Extends the Shelf Life

2021 ◽  
Vol 12 ◽  
Author(s):  
Qianxixi Min ◽  
Leo F. M. Marcelis ◽  
Celine C. S. Nicole ◽  
Ernst J. Woltering
Keyword(s):  
Ascorbic Acid ◽  
Light Intensity ◽  
Shelf Life ◽  
Nutritional Quality ◽  
Dry Matter ◽  
High Light Intensity ◽  
Matter Content ◽  
High Light ◽  
Dry Matter Content ◽  
Quality Aspects

The effect of light intensity applied shortly before harvest on the nutritional quality, postharvest performance, and shelf life of loose-leaf lettuce (Lactuca sativa L. cv. Expertise RZ Salanova®) was investigated. Lettuce was grown either in a greenhouse with supplemental high-pressure sodium light (Experiment 1, EXP 1) or in a climate room under white LED light (Experiment 2, EXP 2). In both experiments full grown plants were transferred to a climate room for the End of Production (EoP) light treatments during the last week of cultivation. During EoP lighting plants were exposed to different intensities (0, 110, and 270 μmol m–2 s–1 in EXP 1; 50, 210, and 470 μmol m–2 s–1 in EXP 2) from white-red LEDs for 6 (EXP 2) or 7 days (EXP 1). Mature leaves were then harvested and stored in darkness at 10°C to study the postharvest performance. Changes in dry matter content, total ascorbic acid, and carbohydrates (including glucose, fructose sucrose, and starch) levels were determined during EoP lighting and during the subsequent shelf life as indicators of lettuce nutritional quality. Quality aspects (appearance, texture, and odor) were accessed during the shelf life as indicators of postharvest performance. In both experiments, high light intensities applied in EoP lighting increased dry matter percentage and contents of ascorbic acid (AsA) and carbohydrates at harvest and these increased levels were maintained during the shelf life. Increased light intensity in EoP treatment also extended the shelf life. The levels of AsA and carbohydrates at harvest correlated positively with the subsequent shelf life, indicating that the prolonged shelf life relies on the improved energy and antioxidant status of the crop at harvest.

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