About Us

MINEVIK Machinery is a leading and pioneering enterprise with the most advanced international level in R&D, manufacturing and selling of large-scale crushing & screening plants and beneficiation plants.

large-scale crushing & screening plants and beneficiation plants.

All of our equipment have got ISO international quality system certification, European Union CE certification and Russian GOST certification.

  • In central China-Zhengzhou, covering 140 thousand square meters
  • Win-win cooperation and create more value to customers
  • Exported large quantities and high-end mobile crushing plant and milling equipments to Russia, Kazakhstan, Indonesia, Ecuador, South Africa, Nigeria, Turkey more than 100 countries .

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Our Products

AS a leading global manufacturer of crushing and milling equipment, we offer including quarry, aggregate, grinding production and complete stone crushing plant. We also supply individual crushers and mills as well as spare parts of them.


Our goal is to guarantee the excellent operation equipment with high safety for our customers and minimize the downtime of the machine by predictive maintenance. Kefid service and original accessories can be 100% trusted at the time of maintenance.


Minevik service and original accessories can be 100% trusted at the time of maintenance.


striving to enable customers to get the parts in the nearest place.


Our sales market is spread all over more than 100 countries and regions

plant extract concentration

How can I determine plant extract concentration?

I understand that you want to prepare a stock solution (s.s.) concentration from the plant extract to be examined by dilutions in a final concentration with keeping the percent of DMSO as 0.5%. If

How can we determine the concentration of an extract

Here the word concentration is not suitable but it would be considered 100% plant extract or herbal extract. It still retains some of the solvent (3-1%) which is difficult to be removed. Most of

Q&A | How do you determine the concentration of plant

For the determination of extract concentration you need to evaporate the solvent (by vacuum evaporator or lyophilisator) and than dissolve the crude extract in the known volume. Usually the

Antimicrobial activity of some plant extracts against

Sterile filter paper discs loaded with plant extract concentration of (10 mg/ml) were placed on the top of Mueller-Hilton agar plates. Filter paper discs loaded with 5 µg of Gentamycin was used as positive control. The plates were kept in the fridge at 5 °C for 2 h. to permit plant extracts diffusion then incubated at 35 °C for 24 h. The

What is the good method of protein extraction for plant

What is the good method of protein extraction for plant leaves? I plan to extract protein from leaves, I would like to measure the concentration of total protein by Bradford assay and from the

How can I prepare a stock solution from a plant extract?

I want to prepare a stock solution (100 mg/ml) from plant extract. How to do that? The extract have to dissolve in DMSO and the final concentration of DMSO have to be 1-2% in the cell culture

2.0 MATERIALS AND METHODS 2.1 Plant material and extract

A stock solution of plant aqueous extract was prepared by dissolving 100 mg of extract in 1 ml of sterile distilled water. Likewise, for the ethanol extract, 100 mg of extract was dissolved in 1 ml of 10 % Tween-20 rather than the original solvent (i.e. Dimethyl sulfoxide), and so the initial concentration of the plant extract (100 mg/ml)

Minimum inhibitory concentrations of medicinal plants

28/10/2010· Most of the plants used by the healers have antibacterial activity, but only 8 of the 141 plants (5.6%) examined in this study show any MIC values of 200 or less mg/ml of extract. Of these 8 plants 5 are used to treat diseases believed to be in bacterial origin by TM, one is a disease not believed to be caused by bacteria and one is used for

Extraction, Isolation and Characterization of Bioactive

02/10/2010· A brief summary of the general approaches in extraction, isolation and characterization of bioactive compound from plants extract can be found in Figure 1. This paper provides details in extraction, isolation and characterization of bioactive compound from plants extract with common phytochemical screening assay, chromatographic techniques

Protocol: Extract bioactive substances from plants – a

Protocol: Extract bioactive substances from plants – a practical scientific guide Be aware: The beauty of plants and their variety of bioactive compounds poses also a serious threat. A lot of plants contain toxic compounds. Even with low concentration of compounds


ANTIBACTERIAL ACTIVITY OF METHANOL PLANT EXTRACTS 535 Minimum inhibitory concentration: The minimum inhibitory concentration (MIC) of the extracts was measured by agar dilution method (Nostro et al., 2000) and agar well diffusion method (Basu et al., 2005). a. Agar dilution method: The plant extracts, which were positive for zone of inhibition

Comparison of Different Solvents for Phytochemical

Antioxidant activity: Blois 17 method was used to determine the free radical scavenging activity of the plant extract by using DPPH (2,2-diphenyl-1-picrylhydrazyl). Briefly, 0.2 mM DPPH solution was made using methanol. Ascorbic acid was taken as standard and 5 different concentrations (200, 400, 600, 800 and 1 mL) were taken to make the standard curve.

Minimum Inhibitory Concentration (MIC) of Myrtus Communis

The plant extract was obtained from Barij essence co. The type strains of C.albicans were prepared from (PTCC 90028) collections. 45 clinical isolates of C.albicans that were confirmed by microbiological methods used in the tests. Inhibitory effects of the Extract

Evaluation of antimicrobial activity of different solvent

using sterile cork borer. Stock solution of each plant extract was prepared at a concentration of 1 mg/ml in different plant extacts viz. Methanol, Ethanol, Petroleum Ether, Water. About 100 µl of different concentrations of plant solvent extracts were added sterile syringe into the wells and allowed to diffuse at room temperature for 2hrs.

Green Nanotechnology from Plant Extracts: Synthesis and

The renewable nature of plant extracts, eco-friendly aqueous medium and mild reaction conditions make the method advantageous over other hazardous methods. In the last years, different kind plants extract and their products have received attention due to its low cost, energy-efficient and


to examine the total phenolic content, flavonoid concentration and antioxidant activity. The yield of extract obtained from 10 g of dry plant material was measured for each extract (Table 1). The highest yield of solid residue was obtained using water or methanol as extraction solvents. Table 1. The yields of solid residue after extraction

Antimicrobial activity of essential oils and other plant

Plant oils and extracts have been used for a wide variety of purposes for many thousands of years ( Jones 1996).These purposes vary from the use of rosewood and cedarwood in perfumery, to flavouring drinks with lime, fennel or juniper berry oil ( Lawless 1995), and the application of lemongrass oil for the preservation of stored food crops ( Mishra & Dubey 1994).

Dosage calculations & extract equivalency in herbal

Hi Mr Breakspear, Your post is very clear thank you for sharing. I am wondering about fresh plant extracts though? How can I be sure about how many grams of herb I am taking if I am taking a 1:1 extract of a plant that has a 50% water content. So if I put 100g of chickweed in 100ml of 95% ethanol and took a 5ml dose would i be getting 2.5g of

u t r it o n & F o f N S ournal o utrition Food Sciences J

and resins in the alcoholic extract. As the leaves of Eucalyptus plant have aqueous extract and alcohol contained resins, tannins, phenols. It tested the effectiveness of inhibitory extract plant against five isolates bacterial and five isolates of molds. It uses the concentration of 50 and 100 mg/ml of each extract, Similarly maximum zone of

Investigating anti-microbial action

j Using sterile forceps, dip a paper disc into the plant extracts. Start with distilled water then move through the plant extracts, working from most dilute to most concentrated. k Using sterile forceps, place a dried paper disc in each section; record the treatment of each disc. Flame forceps (or place in disinfectant) if they contact the

plant extract concentration ericgrim.nl

Plant extracts were diluted at a concentration of 500, 250, 100 and 10 mg/ml in 5% aqueous DMSO. Whatman No. 1 filter paper discs were prepared, sterilized and impregnated with 20 μl of the extract. The discs were placed on the plates inoculated with. Read More

u t r it o n & F o f N S ournal o utrition Food Sciences J

and resins in the alcoholic extract. As the leaves of Eucalyptus plant have aqueous extract and alcohol contained resins, tannins, phenols. It tested the effectiveness of inhibitory extract plant against five isolates bacterial and five isolates of molds. It uses the concentration of 50 and 100 mg/ml of each extract, Similarly maximum zone of

Antibacterial activity of five medicinal plant extracts

Plant extracts are a potentially useful source of antimicrobial compounds. In the study maximum inhibition was observed with ethanol extract of Sdicum against S.aureus, S. pyogenes , S. pneumonia , A. baumannii, E. faecalis and P. mirabilis (100 ppm). Minimum Inhibition Concentration was observed with ethanol extract of S.hortensis

Screening of crude extracts of six medicinal plants used

The MIC value of the four active plant extracts obtained in this study were lower than the MBC values suggesting that the plant extracts were bacteriostatic at lower concentration and bactericidal at higher concentration.

Antimicrobial activity of crude extracts of three

Ethanol Extract Six grams of the powdered plant material was extracted in a soxhlet extractor using 25ml of 40% ethanol. The extract was filtered using What man filter paper no.1 and the filtrates were then evaporated and dried at 60oC in vacuo. The resulting extracts were subsequently weighted to produce 0.034, 0.035 and 0.039g of A B and C

Synergistic Activity of Antibiotics and Bioactive Plant

It is widely accepted that plant extracts, because of complex nature, possess multiple mechanisms of action. Plant extracts and their main components may exhibit activity by: (i) inhibiting bacterial growth or viability, (ii) targeting bacterial virulence factors or (iii) potentiating effectiveness of antibiotics as resistance modifying agents.

Microscale investigations of catalase activity in plant

3 Add only the minimum amount of buffer to make the extract. Never use a greater mass of buffer than of plant matter. With a watery tissue, you may not need to add any buffer. You can sometimes collect the cell contents by holding the dry disc of filter paper in contact

Antibacterial efficacy of leaf extracts of Combretum album

11/07/2018· Modes of action of plant extracts that are distinct from those of the antibiotics in current use, It was also evident from the result that antibacterial activity increased with the increase in concentration of all extracts in all tested bacteria (Table 1). Kumar has reported antibacterial activity of ethanol extract of flower of Combretum indicum, which showed highest inhibition zone (18

Phytochemicals: Extraction, Isolation, and Identification

used to extract phytochemicals, and scientists usually employed a dried powder of plants to extract bioactive compounds and eliminate the interference of water at the same time. Solvents used for the extraction of biomolecules from plants are chosen based on the polarity of the solute of interest. A solvent of similar polarity to the solute

What are CO2 Extracts? Mystery and Myths Explained.

Note: Since CO 2 can extract volatile material, CO 2 extracts can contain the same allergens in essential oils. These should be declared on the labels of your products if their concentration exceeds a certain limit. When purchasing CO 2 extracts, ask your supplier for the analysis or the list of allergens.


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