Method of evaluating nanodispersed copper action on tumour growth in experiment

FIELD: medicine.

SUBSTANCE: to evaluate the nanodispersed copper action on tumour growth in experiment, a suspension of copper nanoparticles in the concentration 1 mg/ml in physiologic saline is introduced in eight doses of 1.25 mg/kg each, at total dose of 10 mg/kg to male rats grouped in three suffering transplantable sarcoma 45. In the first group, the introduction is local, in a tumour, in the second group - intraperitoneal, while in the third reference group, physiologic saline is introduced in the amount 0.3 ml in a rat. The introduction is carried out on 9th, 10th, 12th, 13th, 19th, 20th, 22nd and 23rd post- transplantation days; the animals are killed on the 29 post- transplantation day. The nanodispersed copper action on tumour growth is described by the following criteria - tumour weight, tumour volume, efficiency index, tumour growth inhibition percentage, morphological changes in tumour tissue.

EFFECT: method allows evaluating the nanodispersed copper action on transplantable sarcoma-45 growth.

1 tbl

 

The invention relates to medicine, namely to experimental research in Oncology, and can be used to produce antitumor activity of pure nanosized copper in the experiment.

Known data on the physical-chemical properties and biological activity of various metal nanoparticles. Discusses the ambiguity of the question about their toxicity and mechanisms of action on biological systems and their components. In a series of Toxicological studies have established the toxicity parameters for nanoparticles, including various copper nanoparticles, intraperitoneal and oral administration, as well as their effect on some biochemical parameters. In addition, the nanoparticles due to their size, they have an increased ability to penetrate into cells and embedding in various metabolic chain (see Glushchenko N.N. Physico-chemical principles of biological action of highly dispersed metal powders. // Abstract. Diss. Dr. Sci. Moscow, 1988. 49 C.; Bogoslovskaya et al. The security study of the introduction of copper nanoparticles with different physico-chemical characteristics in the animal organism. // Vestnik OSU. 2009. No. 21. P.124-127).

There are ways to use nanotechnology for molecular diagnostics and targeted therapy of malignancies, use nanotechnology and imaging in the diagnosis and treatment of malignant tumors. To effective anticancer drugs, containing metals include platinum derivatives (cisplatin, carboplatin, oxaliplatin). Derivatives of platinum (Pt) can damage DNA, forming Pt-DNA adducts that block replication, transcription and, as a result, cell proliferation (see Beretta G.L., Righetti, S.C., L. Lombardi et al. Electron microscopy analysis of early localization of cisplatin in ovariancarcinoma cells. Ultrastruct Pathol. 2002. 26. P.331-334). Two major problems that occur when treatment with these drugs, toxic effects (nephrotoxicity, ototoxicity, neurotoxicity and the development of drug resistance, are successfully solved by encapsulating the derivatives of Pt in liposomal nano-structures (see Kaplun A.P., Le Bong Sean et al. Liposome and other nanoparticles as a means of drug delivery. // Questions of medical chemistry. 1999. No. 1. S.89-94; Kulik GI, pivnik V.M. et al. Liposomal preparations: the path to overcoming drug resistance to this drug called cisplatin. Oncology. 2009. T. No. 1. P.76-80).

Copper, as well as platinum, has the ability to form complexes with phosphate, pyrimidine and purine bases of DNA, disrupting the replication processes. In addition, the free fraction of copper (Cu2+) catalyzes the reaction of lipid peroxidation and is involved in the generation of membrane - and genotoxic free radicals (free is adecline DNA damage) (Kudrin A.V., Gromov O.M. Microelement in immunology and Oncology. M: GOATER Media, 2007. 554 S.).

There is a method of treatment of primary liver cancer, kidney cancer (in cell culture) and metastases copper compounds with ligands, which are used alkylating agents melphalan or tegafur. This method is chosen as a prototype (Patent title: Copper melphalan and copper tegafur as anti-tumor agents, GA US, 20090105206, 04.23.2009, AA61K31555FI, 514184). The study showed that the treatment of these complexes gives a higher antitumor, antiproliferative, antiangiogenic and immunomodulatory effect than actually melphalan, tegafur. It is established that copper stabilizes the agents and reduces resistance to them cells. Selectively damaging the tumor tissue and not significantly affecting healthy tissue, this drug does not cause typical melphalan and tegafur side effects.

However, data on the study of the influence of pure nanosized copper on the growth of tumors in vivo in the literature are missing.

The aim of the invention is the determination of antitumor activity of nanosized copper on the model of transplantable solid tumors rat sarcoma 45.

This objective is achieved in that the powder of nanoparticles (NPS) copper, with a particle diameter of 40-100 nm, the particle shape is close to spherical, suspended just before the introduction of physiologically the lump solution in a concentration of 1 mg/ml, the obtained suspension is injected rats-males with transplantable sarcoma 45, divided into three groups, the first group suspension LF copper injected locally into the tumor in the amount of 1.25 mg/kg, the second group suspension LF copper injected intraperitoneally in the amount of 1.25 mg/kg, in the third group, which is the control, injected with saline intraperitoneally, in the amount of 0.3 ml per rat. A suspension of copper powder or saline in the control group injected on the 9th, 10th, 12th, and 13th day of tumor inoculation, then after a five-day break on the 19th, 20th, 22nd and 23rd days of inoculation, the total dose of copper nanoparticles in both experimental groups is 10 mg/kg At the beginning of the injection volume of the tumors in all animals reached 0,65-1,0 cm3(average of 0.91 cm3), the slaughter of animals was made on the 29th day after inoculation of the tumor (5 days after injection LF), criteria of an estimation of influence of LF copper on the growth of sarcoma 45 are: tumor weight (M), tumor volume (V); efficiency index (EI), the percent inhibition of tumor growth (T%), morphological changes in tumor tissue. Intratumoral introduction LF copper rats with C-45 leads to complete in 50% of cases or partial in 25% of cases, regression of the tumor, intraperitoneal injection of LF copper animals with C-45 results in complete tumor regression in 50% of cases and in 50% of cases, is in the appearance of the morphological features of partial regression in the control group, the tumor growth was observed in all animals.

The invention "Method to determine the influence of nanosized copper on the growth of tumors in the experiment is new, because it is not known from the level of medicine in the study of the influence of copper nanoparticles on the growth of transplantable tumors.

The novelty of the invention lies in the fact that for the first time was obtained antitumor effects in experiment on transplantable tumors of the rat C-45 in intratumoral and intraperitoneal administration of nanoparticles of copper.

The invention is industrially applicable as it can be used in health care when conducting experimental research in Oncology when using copper nanoparticles with antitumor effect in cancer research institutes.

"The way to determine the effect of nanosized copper on the growth of tumors in the experiment is as follows.

Powder of nanoparticles (NPS) copper (particle diameter of 40-100 nm, the particle shape is close to spherical) suspended in physiological solution, the obtained suspension was injected to rats locally into the tumor or intraperitoneally. Single dose of administered drug was - 1.25 mg/kg of the animal, total 10 mg/kg (dose eightfold introduction).

The experiment was conducted on the nonlinear rats male weighing 180-220 g having intertwined with the emnd sarcoma 45 (strain obtained from the tumor Bank of the research Institute Edito Russian oncological scientific center named. Ban RAMS). For the induction of sarcoma 45 suspension of tumor cells (1×106cells) in a volume of 0.5 ml was administered to rats subcutaneously in the back area. After tumor inoculation, the animals were divided into three groups. The first group received a suspension LF copper locally in the tumor, in the amount of 1.25 mg/kg, the Second group received a suspension LF copper intraperitoneally, in the amount of 1.25 mg/kg of the Third group served as control and received saline intraperitoneally, in the amount of 0.3 ml per rat. Powder LF copper suspended in saline immediately prior to introduction, at a concentration of 1 mg/ml Dose administered drug does not exceed the maximum tolerated dose for a given metal (see Fedorov SCI et al. To the question about the possibility of using highly dispersed metal powders for introduction into the organism of animals. // Reports of the Academy of Sciences of the USSR. 1979. T. No. 5. S-1280; Glushchenko N.N. et al. Physico-chemical regularities of action of fine iron powder. // The proceedings of the Symposium "Application of biomagnetic media in medicine" (Moscow, 19-20 November 2002). M., 2002. Pp.86-94).

A suspension of copper powder or saline was administered to 9th, 10th, 12th, and 13th day of tumor inoculation, then after a five-day break, the nanoparticles of copper (or saline) was administered on the 19th, 20th, 22nd and 23rd days of inoculation. At the mo the UNT beginning of the injection volume of the tumors in all animals reached 0,65-1,0 cm 3(average of 0.91 cm3). The slaughter of animals was made on the 29th day after inoculation of the tumor (5 days after injection LF).

Evaluation criteria impact LF copper on the growth of sarcoma 45 serve tumor weight (M), tumor volume (V); efficiency index (EI); the percent inhibition of tumor growth (T%); morphological changes in tumor tissue.

Tumor volume was calculated according to the formula Shrek: V=(a×b×C)×π/6, where a, b, and C are the linear dimensions of the tumor (cm), V is the volume of the tumor (cm3(see Emmanuel N. The experimental kinetics of tumor processes. M.: Nauka, 1977. 416 S.).

The performance index was calculated as the ratio of the average weight of tumors in the control to the mean tumor mass in the experience: IE=Mto/Mabout.

The percent inhibition of tumor growth was evaluated by the average volume or average weight of tumor (Tv%Tm%) in the experimental groups compared with the control:

Tv%=[(V-Vo)/V]×100%, where V and Vo is the average volume (cm3) tumors in the control and experimental groups at the end of the experiment.

Tm%=[(MC-Mo)/MK]×100%, where MK and mi average weight (g) tumor in the control and experimental groups at the end of the experiment (see L. F. Larionov Chemotherapy of malignant tumors. M: Medgiz, 1962. P.30).

(A) the Effect of intratumoral injection LF copper on the growth of sarcoma 45.

Intratumoral introduction LF copper rats with C-45 led to a full - 0% or partial - 25% of cases, regression of the tumor. As can be seen from the table, in animals of the control group these indicators have the following values: V cf - 5,96 cm3M cf. - 7,54, At the same time, the average volume and weight of the tumor at the time of slaughter of animals in the group with intratumoral the introduction of LF copper amounted to: cf. V - 2,63 cm3M average of $ 2.53, While in rats with maximal tumor regression cf. V was equal of 0.43 cm3M cf. - 0,073 g, and in animals with partial regression, respectively, cf. V=3,24 cm3, M cf=3,0, Percent inhibition of tumor growth in the total group consisted of: the mass of the tumor site (Tm%) 66.5%in the tumor volume (Tv%) - 55,9%. The performance index LF copper was 2,98. Morphological study of drugs derived from animals with complete resorption of the tumor showed that in all of the fields of view observed substitution connective tissue resorbed tumors, with significant infiltration of lymphoid, plasmocytomas and macrophage elements. In those cases, when there was a partial regression of the tumor, drugs in most of the fields of view (2/3) observed rarely located tumor cells (45), some of them were dystrophic changed, and most suffered from necrosis (seen extensive areas of necrosis). In separate groups of tumor cells, up to 3-5 in sight, found the coexisted figures of mitosis, including atypical. However, even in tumor drugs derived from animals with the continuing growth of C-45, which in most of the fields of view were observed shapes of mitosis in places (1/4 field of view) was noted areas rarely located dystrophic changes of tumor cells and foci of their necrosis.

On the preparations of animal tumors from the control group in all fields of view were observed tumor growth, with a dense arrangement of cells and multiple figures of mitosis (10-12 in the field of view), including atypical.

B) the Effect of intraperitoneal administration of LF copper on the growth of sarcoma 45.

Intraperitoneal injection of LF copper animals with C-45 led to a complete regression of the tumor in 50% of cases and in 50% of cases to partial regression. The table shows the results of evaluation of the LF of copper on the growth of the tumor. From the presented data shows that the average tumor volume was - 2.2 cm3the average weight of 4.57 g (including full regression V cp.=of 0.01 cm3, M cf=0,072 g). The percent inhibition of tumor growth was: tumor weight (Tm%) - 46,4%tumor volume (Tv%) - 63,1. The performance index amounted to 1.86. In cases of complete resorption of the tumor morphological picture was identical to the picture, obtained by intratumoral the introduction of LF copper. The morphological study of drugs derived from animals with frequent who offered regression of the tumor, only 1/2 of the fields of view observed tumor growth with mitotic figures division, the other divisions were represented dystrophic modified or necrotic tumor. Attention was paid that even in areas of growth, with figures of mitosis, most tumor cells were rarely, some of them were dystrophic changed. In addition, it was observed activation of immune system cells, infiltrating (sometimes significantly) connective tissue border of the peripheral areas of the tumor.

The effect of copper nanoparticles on the growth of transplantable solid tumors rat sarcoma 45
The group of animalsThe tumor weight (g) M±MTumor volume (cm3) M±MTm %Tv, %IE
Control group n=107,54±0,595,96±0,77---
Intratumoral introduction LF copper n=82,53±0,932,63±0,74 66,555,92,98
P=0,0004P=0.006
Intraperitoneal injection of LF copper n=84,57±1,732,2±0,6646,463,1to 1.86
P=0,09P=0,0019

Technical and economic efficiency "Method to determine the influence of nanosized copper on the growth of tumors in the experiment is that intratumoral and intraperitoneal injection of copper nanoparticles in rats with s-45 leads to complete in 50% of cases or partial in 25% of cases, regression of the tumor with little difference in results depending on the method of administration. The percent inhibition of tumor growth in the total group consisted of: the mass of the tumor site (TM%) 66.5%in the tumor volume in the total group (TU%) - 55,9%. The performance index of the impact NC copper amounted to 2.98. Morphological study of drugs derived from animals with complete resorption of the tumor showed that in all of the fields of view observed substitution connective tissue resorbed tumors, with significant infiltration of lymphoid, plasmacytomas and micropapillae elements. The effect of LF copper on tumor growth: average tumor volume was - 2.2 cm, average weight - 4.57. The percent inhibition of tumor growth was: tumor weight (TM%) 46.4 per cent, by volume of the tumor (TU%) 63,1. The performance index was 1.86.

The way to determine the effect of nanosized copper on the growth of tumors in the experiment involving the introduction of a suspension of nanoparticles of copper, at a concentration of 1 mg/ml in saline eight-fold in a dose of 1.25 mg/kg, total dose 10 mg/kg to rats-males with transplantable sarcoma 45, divided into 3 groups: in the first group, the introduction is carried out locally in the tumor, in the second group intraperitoneally, in the third control group injected with saline in the amount of 0.3 ml per rat, and the introduction is carried out on the 9th, 10th, 12th e, 13th, 19th, 20th, 22nd and 23rd days of inoculation; the slaughter of animals is carried out on the 29 th day after inoculation of the tumor; and determine the effect of the nanosized copper on the growth of tumors on the following criteria: tumor weight, tumor volume, the performance index, the percent inhibition of tumor growth, morphological changes in tumor tissue.



 

Same patents:

FIELD: medicine.

SUBSTANCE: right jugular vein is catheterised in rat experiments. A cardiotoxic preparation is introduced. A central venous pressure is measured in cmAq interactively for 60 min after the introduction of the cardiotoxic preparation. If observing the values 4.0-3.0 cmAq, a mild poisoning is diagnosed, 2.9-1.5 cmAq - a moderate poisoning, and the values less than 1.5 cm cmAq show a severe poisoning.

EFFECT: method allows high accurate measurement of the central venous pressure both in acute cardiotoxic and cardiotropic poisonings depending on a dose introduced, and in various critical conditions, with interpreting disturbed central hemodynamics as a whole.

12 ex, 1 tbl

FIELD: medicine.

SUBSTANCE: for simulating a combined radiation mechanical injury, animals are exposed to whole-body homogeneous irradiation in a dose that invokes development of acute moderate radiation sickness. It is followed with consistent mechanical injuring to simulate a moderate or severe closed abdominal injury involving a spleen with a load 0.5 kg, falling under its own weight of own weight from height 1 m in a hollow drive pipe fixed in a support at an angle 75°. The animals are fixed lying flat on the back and turned right-side Thereafter, developing life dangerous consequences represented by continuous abdominal hemorrhage and traumatic shock signs burdened by symptoms of a primary radiation response are stated to start urgent therapeutic actions.

EFFECT: method enables assessing mutual burden syndrome and effectiveness of surgical management with involving minimally invasive video-assisted endosurgical techniques.

FIELD: medicine.

SUBSTANCE: jejunal epithelium repair in old laboratory animal exposed to ionising radiation is ensured by intravenous transplantation of allogenic multipotent mesenchymal stromal cells recovered from placenta in amount 6×106 cell/kg 25-30 min after the exposure.

EFFECT: invention allows extending the range of products able to maintain repair tissue potential, namely antiapoptogenic action, higher cell turnover of crypt jujenal epithelium depressed by the ionising radiation exposure, with no therapeutic complications.

3 tbl

FIELD: medicine.

SUBSTANCE: hyperhomocytein induced endothelial dysfunction is simulated by intragastric introduction of amino acid methionine 3 g/kg to male Wistar rats once a day for 7 days. After methionine introduction completed, on the 8th day from the beginning of the experiment, the animals are anaesthetised to catheterise a left carotid artery to record haemodynamic values; bolus dosing of pharmacological agents (acetylcholine in a dose 40 mcg/kg, sodium nitroprusside in a dose 30 mcg/kg) is executed in a right femoral vein. The haemodynamic values are measured by an invasive sensor and Biopac computer program. A degree of endothelial dysfunction development is evaluated by an endothelial dysfunction coefficient. A degree of hyperhomocysteinemia development is evaluated by the homocystein content in blood serum of the experimental animals.

EFFECT: method provides development of an easily reproduced and toxicologically safe model of hyperhomocystein induced endothelial dysfunction.

1 ex, 2 tbl

FIELD: medicine.

SUBSTANCE: invention relates to field of medicine, namely to experimental and clinical medicine. In order to diagnose acute inflammatory-destructive process in abdominal cavity in experiment impedance of parietal peritoneum is measured in place of supposed inflammation and symmetric healthy part of body in six equidistant points of the left and six, symmetric to them points of the right half of abdominal cavity. Average values of obtained indices are calculated separately for the right and the left half of abdominal cavity. Value of impedance of isotonic sodium chloride solution is measured. Coefficient K, equal to ratio of smaller average value of parietal peritoneum impedance of one side to value of impedance of isotonic sodium chloride solution, is calculated. If K is smaller than 4, then inflammatory-destructive process takes place in abdominal cavity.

EFFECT: method increases accuracy, objectivity and reliability of diagnostics of inflammatory-destructive process in abdominal cavity.

1 ex, 3 tbl

FIELD: medicine.

SUBSTANCE: device for modelling focal lesions of brain contains a case which represents a hollow guiding cylinder; a cocking lever; a percussion mechanism, consisting of a rod and a replaceable bullet; a replaceable drive spring; a trigger, consisting of a lever and a tightening screw, which serves a rest to the drive spring; a rest nut for fixation of the device to external supports and rests and mounting on it of additional devices and elements. The case is made with internal thread in the upper part, which corresponds to the thread on the tightening screw, and external thread in the lower part, which corresponds to the thread on the rest nut, and has a slot for travel of the cocking level along the axis of the percussion mechanism. Heads of replaceable bullets have different configuration. Replaceable springs have different ranges of rigidity.

EFFECT: compact and dismountable construction of the device with replaceable working elements, possibility to apply injuring impact in all coordinate axes, at arbitrary angle, of specified severity and area make it universal and make it possible to apply for modelling other types of injuries under impact of kinetic energy.

2 dwg

FIELD: medicine.

SUBSTANCE: method includes intraperitoneal introduction of metal nanoparticles. To tumour-carrying mice with ascitic tumour sarcoma 37 4 days after transplantation intraperitoneally introduced are 0.5 ml of suspension of nanoparticles of metals copper, zinc or iron in concentration 10 mcg/ml daily during 4 days, total dose per a mouse being 20 mcg/mouse.

EFFECT: increase of death of transplanted tumour cells due to action of metal nanoparticles.

1 tbl

FIELD: medicine.

SUBSTANCE: after operation a section of tumour is taken from patient, placed into diffusion chamber together with solution of chemical preparation, chamber is placed into peritoneal cavity of rat for 1 week. After that animals are removed from experiment, fixation, staining and light microscopy of filter from chamber are performed, sensitivity of tumour to said chemical preparation is determined by presence or absence of tumour cell growth. After that, since the eighth day after operation patient is subjected to intraperitoneal autoplasmachemical therapy for 5 days with the preparation to which tumour is sensitive.

EFFECT: increase of anti-tumour action of intraperitoneally introduced cytostatics, incubated on autoplasma, due to individual selection of chemical preparation.

2 ex

FIELD: medicine.

SUBSTANCE: in order to prevent toxic action of molybdenum in experimental animals in case of chronic poisoning, nanocomposite carbon modified sorbent is introduced to animals through probe into stomach every second day in form of 6% solution in amount of 2.5% of body weight. Simultaneously daily ammonium molybdate solution is introduced into stomach through probe in dose 50 mg/kg.

EFFECT: method ensures efficient prevention of toxic action of molybdenum in case of chronic poisoning due to considerable reduction of molybdenum toxic action expression in case of chronic poisoning by reduction of its accumulation, increase of heavy metal removal from organism and improvement of morphofunctional condition of affected organs.

1 ex, 1 tbl, 1 dwg

FIELD: medicine.

SUBSTANCE: in analysis of chronic toxic impact of heavy metals on organism every second day nanocomposite carbon modified sorbent is introduced into experimental animals in form of 6% suspension through probe into stomach in amount 2.5% of body weight, simultaneously with daily introduction through probe into stomach of 0.1 ml of nickel chloride solution, which contains 2.5 mg of nickel, per each 100 g of animal body weight during a month.

EFFECT: specially selected modes of introduction of nickel into organism and corresponding modes of introduction of selected sorbent make it possible to analyse methods of preventing lesions in case of chronic toxic action of nickel on functional state of cardiovascular system, in particular, toxic cardiopathy.

1 ex, 3 tbl, 1 dwg

FIELD: machine building.

SUBSTANCE: procedure consists in immersion of tubular casing of fuel rod into water electrolytic medium containing particles of iron oxide and in covering it at least partially with layer of iron oxide. Also, particles of iron oxide are produced by anode oxidising iron containing working electrode.

EFFECT: increased corrosion resistance of treated rod and its increased service life.

7 cl, 1 dwg

FIELD: machine building.

SUBSTANCE: device consists of rotating precipitating portion. A precipitator consists of a stabilising chamber, precipitating chamber and of a channel for centrate drainage. The precipitating chambers are divided with partitions with orifices for liquid flow. Precipitation is performed from a moving layer of liquid, while drying of sediment is done through additional orifices in the partitions between the chambers. The precipitating chamber rotates on a faceplate. A flat removable precipitating plate is set on the bottom of this chamber. Bigger particles settle near the partition between the stabilising and precipitating chambers, while finer particles settle further from the sad partition downstream on the flat removable precipitating plate. A rotating pipe line supplies suspension into the precipitator. The device is also equipped with a stationary portion of centrate reception made in form of a jacket for reception of centrate. A convex bottom of the jacket is inclined.

EFFECT: sedimentation of both large and fine particles of suspension during analysis, easy unloading of sediment with minimal losses and with maintaining order of settled particles.

1 dwg

FIELD: medicine.

SUBSTANCE: invention refers to a method of analysing oligosaccharides being components of low molecular weight heparins and very low molecular weight heparins in blood plasma. A method of analysing β-unsaturated oligosaccharides in blood plasma. Application of the method for quantitative analysis of enoxaparin, octaparin, bemiparin or tinsaparin. Application of the method for quantitative analysis of octasaccharides (versions).

EFFECT: more adequate oligosaccharide analysis.

15 cl, 2 dwg, 2 tbl, 2 ex

FIELD: medicine.

SUBSTANCE: conjunctival cell sample is collected by pressing a bulbar conjunctiva of an examined eyeball at 2-3 mm above a limb in the meridian 12 hours with a soft contact lens (SCL) placed with its concave side on a tonometre. Then, the SCL is removed from the tonometre and turned out so that the collected sample is at the bottom of the SCL which is fixed in 95% alcohol by single dip. Then, the SCL is washed with distilled water, then coloured with hematoxylin for 10-15 seconds, wash with distilled water and air-dried. Thereafter, the SCL is placed on a slide surface for cytological analysis.

EFFECT: invention allows simplifying the method for conjunctival cell preparation for cytological analysis, reduced analysis time and cost.

1 ex

FIELD: agriculture.

SUBSTANCE: observation ranges are selected on the river, starting from river source and setting at least one permanent or temporary range of observations on the territory of river source, then from the first observations range distances are measured to subsequent observation ranges along river, which are arranged within a city or a settlement, as well as downstream and upstream. At least one permanent or temporary observation range is also set in river mouth. Having analysed water samples to assess results of measurements in dynamics along main river bed, there results of measurements are exposed to statistic modelling to detect biotechnical laws in change of contaminants concentration in river water depending on distance from the first observation range in river source, by values of increment towards river mouth with each observation range taken into account in measurements.

EFFECT: expansion of functional capabilities of measurements of river contamination with waste waters and higher accuracy of relation of these measurements results to river bed from source to mouth.

6 cl, 1 ex, 3 tbl, 17 dwg

FIELD: medicine.

SUBSTANCE: invention relates to medicine and can be used in periodontology, surgical dentistry and maxillofacial surgery. In order to predict reparative regeneration and treatment of periodontal tissues condition of phagocytic system and tissue structure formation are detected. In scrape from gum surface and in content of periodontal recesses carried out is account of transformed neutrophilic granulocytes (TNG): increased in size with defragmentation of nuclei and decondensation of chromatin with preserved cell membrane, with envelope rupture and release of cell content into intercellular space, isolated nuclei without cytoplasm with septa between fragments and without them - naked-nuclei elements, small segmentated cells with intensive basophilia - "compact forms". If there are up to 20% of TNG in cytogram, transplantation of autologous vascular-stromal cell fractions is prescribed to patient. If content of TNG in cytoplasm is 20%-50%, complex treatment in accordance with conventional scheme with further rehabilitation of dentoalveolar apparatus under dynamic control of periodontum state is performed. If content of TNG is above 50% favourable outcome with one-stage traditional treatment is predicted.

EFFECT: method makes it possible to increase efficiency of treatment of inflammatory, inflammatory-destructive and pyoinflammatory diseases.

6 dwg, 3 ex

FIELD: medicine.

SUBSTANCE: for an assay, 5-7 cm3 of blood is taken, and before extraction the sample is pre-treated with 2 cm3 of 60% sulphuric acid; the extraction process is executed with 30 cm3 of n-hexane once, and gas chromatography is preceded with single treatment of n-hexane extract with 10 cm3 of concentrated sulphuric acid.

EFFECT: invention provides higher reliability of α-HCCH, γ-HCCH test results and twofold reduced time of sample preparation.

1 ex, 1 tbl

FIELD: physics.

SUBSTANCE: method involves standardisation on weight ratio of water of the used substance which contains chemically combined water. The used substance, for which qualitative separation of the adsorbed and chemically combined water is possible, is preheated to remove adsorbed water and chemically combined water contained in the used substance is standardised. When preparing a standard sample of the composition of uranium oxides, the substance used is a monohydrate of uranium trioxide, which is preheated to remove absorbed water and the chemically combined water contained in the monohydrate is standardised.

EFFECT: maintaining the standardised value of the weight ratio of water in dispersed substances used to prepare standard samples, independence of the weight ratio value from environmental factors and from storage conditions for these substances.

2 cl, 4 dwg, 4 ex

FIELD: medicine.

SUBSTANCE: separated films are placed for 6 hours into 30% water solution of alcohol in amount, equal to preparation volume. After that, they are washed in flowing water for 10 minutes in order to remove let down mesothelial cells, fixed in formalin, washed and placed into 96% alcohol for 30 minutes to degrease the surface, after that, sensitised in 10% solution of silver nitrate for 10 minutes. Then silver is impregnated by keeping preparation for 30 minutes in ammonium solution of silver nitrate, washed for 2 minutes in 5 parts of distilled water to remove impregnated silver from basal membrane, remaining impregnated silver is reduced into metal state with 1% formalin during 30 seconds to give preparation blackish colour. Microscopy is carried out on unfolded wet free film preparations by means of microscopes with flat field of incident light, provided with objectives for work without cover glasses, at unilateral oblique incident illumination, carrying out for said purpose edge blocking half of light flow of standard-issue episystem of microscope illumination in mode of dark field with non-transparent shutter.

EFFECT: method improvement.

3 cl, 11 dwg

FIELD: medicine, pharmaceutics.

SUBSTANCE: invention relates to medicine, namely, to normal pathologic anatomy and forensic medical examination. Essence of method of restoring natural face skin colour in corpses lies in the following: opened are common carotid arteries, which subsequently are catheterised. Through them forced is fixing-restoring solution of the following composition: formalin 10% - 700 ml, ethanol - 200 ml, hydrogen peroxide 30% - 20 ml, glycerine - 50 ml, sodium chloride - 20 g, eosin - 0.2 g. Simultaneously face skin is massaged with application of vaseline.

EFFECT: application of method makes it possible to carry out fast restoration of natural face skin colour in copses.

6 dwg, 1 ex

FIELD: automatical aids for sampling liquids.

SUBSTANCE: system for sampling and delivering filtrate has filter submerged into tested medium and connected with collecting tank and vacuum pressure source which is connected with top hole of collecting tank by means of pneumatic pipe. System has sample receiving tank connected with collecting tank and control unit which has first output to be connected with vacuum pressure source. Collecting tank has two separated chambers - washing chamber and dispatching chamber. Lower hole of washing chamber has to be lower hole of collecting tank and side hole of dispatching chamber has to be side hole of collecting tank. Floating valve is installed inside washing chamber to shut off lower and top holes. Filter is connected with lower hole of collecting tank through sampling pipe. Side hole of collecting tank is connected with lower hole of tank for receiving samples through sampling pipe. Flow-type sensor and check valve are installed inside transportation pipe. Output of flow-type sensor is connected with input of control unit; second output of control unit is connected with control input of analyzer.

EFFECT: improved precision of measurement of sample ion composition; prolonged service life of filter.

1 cl, 1 dwg

Up!