Glucose Monohydrate Research Articles

High-Sensitivity and Wide-Range Flexible Ionic Piezocapacitive Pressure Sensors with Porous Hemisphere Array Electrodes.

The development of high-performance flexible pressure sensors with porous hierarchical microstructures is limited by the complex and time-consuming preparation processes of porous hierarchical microstructures. In this study, a simple modified heat curing process was first proposed to achieve one-step preparation of porous hemispherical microstructures on a polydimethylsiloxane (PDMS) substrate. In this process, a laser-prepared template was used to form surface microstructures on PDMS film. Meanwhile, the thermal decomposition of glucose monohydrate additive during heat curing of PDMS led to the formation of porous structures within PDMS film. Further, based on the obtained PDMS/CNTs electrodes with porous hemisphere array and ionic polymer dielectric layers, high-performance ionic piezocapacitive sensors were realized. Under the synergistic effect of the low-stiffness porous hemisphere microstructure and the electric double layer of the ionic polymer film, the sensor based on an ionic polymer film with a 1:0.75 ratio of P(VDF-HFP):[EMIM][TFSI] not only achieves a sensitivity of up to 106.27 kPa-1 below 3 kPa, but also has a wide measurement range of over 400 kPa, which has obvious advantages in existing flexible piezocapacitive sensors. The rapid response time of 110 s and the good stability of 2300 cycles of the sensor further elucidate its practicality. The application of the sensor in pulse monitoring, speech recognition, and detection of multiple dynamic loads verifies its excellent sensing performance. In short, the proposed heat curing process can simultaneously form porous structures and surface microstructures on PDMS films, greatly simplifying the preparation process of porous hierarchical microstructures and providing a simple and feasible way to obtain high-performance flexible pressure sensors.

Improved tableting properties of ascorbic acid via eutectic compositions with sugars

Ascorbic acid (ASC) is commonly used as an anti-oxidant and a dietary supplement due to its radical scavenging properties. The ASC chewable tablet dosage form is regularly prescribed to increase immunity among Covid-19 patients. The main drawback during tableting of ASC is its brittle nature because of interlocking packing arrangement, strong hydrogen bonding between complimentary functional groups and lack of slip planes in its crystal lattice. In order to improve the compaction properties of ASC, sugar and sugar alcohol as coformers with better tableting profile over ASC were introduced. During high throughput cocrystal screening, four eutectic compositions of ASC with glucose (GLU), mannitol (MAN), sucrose (SUC) and lactose monohydrate (LAC) were obtained in an equivalent stoichiometry. The binary eutectics (1:1) were confirmed by their lower melting endotherms compared to the individual components and overlapping of those in XRD characterization. The regular (lamellar) microstructures of the ASC-GLU and ASC-MAN eutectics and irregular (acicular or globular) microstructures of the ASC-LAC and ASC-SUC eutectics were confirmed by the optical and scanning electron microscope (SEM) images of the crystallized binary compositions. Similar to ASC, all the eutectic mixtures were proved to be non-hygroscopic at 25 ᴼC/80 % RH. The eutectics with disaccharides such as ASC-SUC and ASC-LAC improved the tensile strength (tabletibility) of ASC with lower porosity, compared to the corresponding monosaccharide eutectics (ASC-GLU/ASC-MAN). Improved compaction properties of ASC-SUC/LAC eutectics is correlated with higher inter-particulate bonding area and bonding strength.

False-positive Aspergillus galactomannan immunoassay in the glucose component of total parenteral nutrition products.

In October 2022, we experienced a significant increase in samples showing high galactomannan (GM) indexes ranging from 6.22 to 10.58, as determined by the Platelia Aspergillus antigen immunoassay, also known as the GM test. After reviewing the medical records of nine GM antigenemia cases that did not show evidence of invasive aspergillosis, we found that these patients had received total parenteral nutrition (TPN) products from the same manufacturer, whose supplier of the glucose component had recently changed. The TPN products supplied by the specific manufacturer in October were subjected to a GM assay. The glucose component of the products from three different lot numbers exhibited strong positive results in the GM assay. Microbiological investigations through fungal culture and PCR on the TPN products were negative. The present study demonstrated that the glucose component of the TPN products contained a high level of GM antigen, which caused false-positive GM test results. The source of GM in the glucose component was glucoamylase, which was produced from Aspergillus niger to obtain glucose monohydrate from starch. Investigation of three commercially available glucoamylase products exhibited positive GM and 1,3-β-D-glucan tests with various titers positive up to 1:1,000 dilutions, while fungal cultures were all negative. Quality assurance measures of TPN products to prevent GM contamination should be emphasized during the manufacturing process to avoid unnecessary additional diagnostic procedures and overtreatment of invasive aspergillosis due to false-positive GM tests.IMPORTANCEThis manuscript describes an occurrence of false-positive GM tests in patients receiving TPN products from a manufacturer who had recently changed the supplier of the glucose component. We describe the clinical presentation of nine false-positive cases and the results of serologic and microbiological investigations of the TPN products suspected of contamination with GM. Attempts to detect GM in parenteral nutrition products were made since the detection of GM in sodium gluconate-containing solutions in 2007, but none of them identified the source of elevated GM indexes in TPN products. However, the present study demonstrated that the glucose component of the TPN products contained a high level of GM antigen, which caused false-positive GM assay results. The source of GM was glucoamylase, which was derived from A. niger in the manufacturing process. Physicians and clinical microbiology laboratories should be aware of this issue to improve interpretation and patient care.

Estimation Of Glycemic Index Of Liver Nutritional Supplement And Its Importance In Liver Nutrition

A global increase in incidence of chronic liver disease (CLD) indicated the necessity of dietary and lifestyle modification. Low glycemic index (GI) diet was reported to have a significant role in controlling diabetes caused by liver dysfunction. The International Standards Organisation (ISO) has standardized the determination of GI of a food in healthy individuals. This study aimed to estimate GI value of a high protein, energy dense liver nutritional supplement. This cross-over randomized controlled study randomly allotted 15 participants to consume either reference food 27.5 gm glucose (glucose monohydrate) or 77 gm nutritional supplement (equivalent to 25 gm of available carbohydrates); switching to another arm was done after 3 days wash-out period. After overnight fast, blood samples were collected at 15, 30, 45 and 60 minutes post-consumption of s upplement or reference food. The GI was calculated from the incremental area under the blood glucose response elicited by the nutritional supplement as a percentage of the response after consumption of 27.5 gm of glucose (glucose monohydrate) by the same participant using a standard formula. Mean GI of the nutritional supplementwas estimated as 11.4 ± 2.4.With the consumption of this nutritional supplement, the blood glucose levels were reduced at all postprandial time points, compared to the reference food. The liver nutritional supplement tested has a low GI, and comparatively slower and more sustained blood glucose response. Therefore, it can be used in patients with CLD to prevent CLD-associated metabolic complications and improve health outcomes and quality of life.

Glycemic index of a nutritional supplement designed for people with chronic kidney disease.

The study was carried out to measure the glycemic index (GI) of an oral food supplement for people with CKD as well as on patients on maintenance dialysis. The study was conducted as per international protocols for testing GI, was approved by the local institutional ethics committee, and was registered with the Clinical Trial Registry of India (CTRI). This was a crossover randomized controlled study which enrolled 15 participants between the ages of 18 and 45 years. The participants were randomly allotted to one group that consumed either the reference food (27.5 g of glucose monohydrate) or 118 g of the nutritional supplement which contained 25 g of available carbohydrates. Fasting capillary blood samples as well as blood samples at different time intervals as per the GI protocol, after consumption of either the supplement or the reference food were taken from the participants. Each testing day was separated by a 3-day washout period. GI was calculated from the incremental area under the blood glucose response elicited by the nutritional supplement as a percentage of the response after the consumption of 25 g of glucose (27.5 g of glucose monohydrate) by the same participant using a standard formula. The GI of the nutritional supplement was calculated to be 10.3 ± 2.0 which is considered to be low as per international GI testing standards. The product was created to supplement the diet of people with CKD at different stages and to help prevent the progression from CKD to ESRD as well as the risk for CVD. This product was found to have a low GI which is desirable for people with CKD as well as diabetics in general who are at risk for developing CKD.

Estimation of glycemic index in a dietary formulation targeted to support enteral and oral nutritional needs

BackgroundEnteral nutrition (EN) is the preferred method to extend nutritional support and mitigate the chances of malnutrition in patients who are critically ill. In these patients, the risk of hyperglycemia is high and can result in poor clinical outcomes and delayed recovery. Hence, estimation of the glycemic index (GI) of supplements used in EN becomes important to reduce all such risks.ObjectiveTo estimate the GI of a nutritional supplement formulated for critically ill patients during hospitalization and after recovery.MethodsTen healthy participants (mean age: 25 years; mean body mass index: 21 kg/m2) were included in the study. The test food was a high protein energy dense supplement, that derived 25 g of available carbohydrates which was fed to all the participants. The reference food used was 27.5 g of glucose monohydrate drink. Capillary blood glucose was measured at fasting (0 min) and at an interval of 15 min till 120 min, after consuming the reference and test food, for estimating the GI. Glycemic index values were computed by using the method suggested by the Food and Agriculture Organization of the United Nations (FAO) and the the World Health Organization (WHO).ResultsThe mean GI of the test food was 39 ± 3 when calculated using the internationally recognized GI protocol.ConclusionThe GI of the test food was found to be in the category of low GI.

Determine the glycemic index of 4 types of milk proanecy intensive, operancy, proanecy diabetes, and proanecy hepa

Hyperglycemia and insulin resistance are associated with morbidity and mortality in critically ill patients, patients with diabetes mellitus, patients with alcoholic hepatitis, and postoperative patients. Low GI (glycemic index) foods help control blood sugar and insulin resistance. Therefore, the goal of the study was to determine the glycemic index of 4 kinds of milk for 4 subjects whose hyperglycemia affected treatment outcomes, namely, critically ill patients (proanecy intensive), the patient who must be treated with surgery (operancy), patients who with diabetes (proanecy diabetes), and people taking alcoholic or alcoholic hepatitis (proanecy hepa). A self-controlled clinical trial with 7 crossover experiments with glucose monohydrate as the reference food was performed according to ISO 26642:2010 recommended by FAO/WHO in 11 healthy students (9 females and 2 males, mean age 20.9±0.3). Results showed that changes in postprandial blood glucose for 4 test foods at 15, 30, 45, 60, and 90 minutes were lower than those of the reference food (glucose) with statistical significance at p<0.000. At 120 minutes, only the difference in postprandial blood glucose change between the reference food (glucose) and proanecy hepa milk was statistically significant with p=0.016. The GI of proanecy intensive was 14.3±2.9 with a coefficient of variation (CV) of 19.9%; operancy was 16.5±2.1 with CV 12.7%; proanecy diabetes was 14.0±1.9 with CV 13.6%; and proanecy hepa was 11.8±2.7 with CV 23.0%. In conclusion, the GI of 4 types of milk was classified as low, less than 55.

Ameloriate Effect of Glucose Monohydrate on Nicotine Sulfate-induced Toxicity and Teratogenicity in Xenopus embryos: an Experimental Study

It is well documented that nicotine causes low birth weight, preterm birth, pregnancy difficulties, lower fertility, inhibition of spermatogenesis, and decreased steroidogenesis and potassium channels conductance of Xenopus oocytes. Lung cancer is the most well-known adverse impact of nicotine. This work used a 96-hour FETAX test to examine how concurrent administration of glucose monohydrate modifies the effects of exposure to nicotine, nicotine sulfate, and/or glucose on ion channels and membrane potential in Xenopus leavis embryos at an early stage of development. In-vitro fertilised embryos were treated with nicotine and glucose alone or in combination for this aim, and the effects of those treatments were then assessed for potential teratogenic effects. At the conclusion of the FETAX technique, the ratios of healthy, abnormal, and dead embryos were calculated, and the length of embryos in each treatment group was assessed. The ratios of abnormal and dead embryos were considerably higher with nicotine treatment alone compared to controls. Compared to the results of the nicotine-alone treatment group, the ratio of aberrant embryos was marginally reduced by concurrent glucose and nicotine therapy. In contrast, the ratio of normal embryos was raised. Additionally, treatments with glucose, nicotine, and Nic+Glu significantly altered the resting membrane potentials of fertilised oocytes (p < 0.001). Our findings indicated that the simultaneous treatment groups that also received glucose had a protective impact on embryos. Such structured, more sophisticated research is required to confirm these findings.

In vitro effect of relaxin in the rat corpus cavernosum under hyperglycemic and normoglycemic conditions.

Relaxin, an endogenous peptide hormone, elicits vascular relaxation by its direct effect or by modulating the endothelium-dependent relaxation response and is clinically evaluated for the treatment of coronary artery disease. However, its effect on penile tissue has not been explored yet. This study aimed to investigate the effect of serelaxin, recombinant human relaxin-2, on rat corpus cavernosum (CC) under healthy and hyperglycemic conditions. Strips of CC obtained from thirty-nine male Wistar rats weighing 300-350 g were used in organ baths for isometric tension studies to investigate the serelaxin-mediated relaxation (10-12-10-7 M) under normoglycemic conditions and the effect of serelaxin on endothelium-dependent [nitric oxide (NO)- and prostacyclin-mediated] relaxation responses under hyperglycemic conditions. The in vitro hyperglycemia model was created by 3 h of incubation with 44 mM glucose monohydrate +120 μM methylglyoxal. NO-dependent relaxation responses were evaluated by cumulative acetylcholine (10-9-10-4 M) administration in the presence of indomethacin (10-6 M). Prostacyclin-mediated relaxation was evaluated by cumulative administration of iloprost (10-9-10-6 M), a prostacyclin analog. Maximum relaxation responses to serelaxin were not significantly different compared to the time-control (p = 0.480). Three hours of incubation of rat CC in hyperglycemic conditions impaired NO- and prostacyclin-mediated relaxation responses (p = 0.032 and p = 0.047, respectively). Serelaxin coincubation worsened NO-mediated relaxation responses (p = 0.016) but did not affect prostacyclin-mediated responses (p = 0.425). Together, our results demonstrate that in vitro administration of serelaxin does not cause relaxation in penile tissue and short-term in vitro serelaxin treatment in hyperglycemic conditions mimicked diabetes modulates endothelium-dependent responses by worsening NO-mediated responses. Serelaxin exerts different effects via different mechanism on endothelium-dependent responses depending on the dose and duration of exposure. Therefore, proper timing and dosing of serelaxin administration in the penile tissue need to be investigated in further studies in diabetic animal models.

Verification of combustion rate of recovery and counting efficiency in the analysis of organically bound tritium in biota samples

The analysis procedure of five biota samples’s organically bound tritium (OBT) based on oxidation combustion and liquid scintillation counter (LSC) measurement was established. The combustion experiment under one atmospheric pressure in the presence of Pt-Al2O3 catalyst were carried out. The experiment results shown that the combustion recovery of five samples ranged from 86.4 % to 91.1 %, the combustion recovery of glucose monohydrate is about 93.7 %, which indicate that combustion recovery of biota samples differed from one species to another. Meanwhile, The counting efficiency of quenching agents CH3NO2 and CCl4 decreases from 20.3 % to 0 and from 19.3 % to 0 respectively as the quench agent mass increases from 10 μL to 500 μL. The counting efficiency of quenching agent HNO3 decreases from 22.4 % to 14.6 % as the quench agent mass increases from 10 μL to 500 μL. The SQP (E) value of CH3NO2 and CCl4 decreases as the mass of quenching agents increases, while the SQP (E) value of HNO3 increases as the quench agent mass increases. The SQP(E) of three tested quench agents ranges from 401.8 to 738.4, which covers the SQP(E) range of all the monitored biota samples in recent years. Therefore, the mapped curves and fixed equations are applicable. In addition, comparison experiment of four biota samples between two laboratories shown a relative deviation from 1.2 % to 12.8 %.

Assessment of Insulin, GLUT2 and inflammatory cytokines genes expression in pancreatic β-Cells in zebrafish (Danio rario) with overfeeding diabetes induction w/o glucose.

In recent years, zebrafish have been proposed as a model for rapid analysis of gene function and biological activity due to high genetic similarities with humans. The aim of this study was to determine the effects of overfeeding-induced diabetes w/o glucose on inflammatory cytokine as well as insulin and glucose transporter-2 genes (GLUT2) genes expression in the pancreas in zebrafish. The experiment was performed on 120 zebrafish (duplicated sample) with a specific genetic mapping (AB-Wild type). A total of 8 tanks, each containing 15 fish per 2-liter water, were used and divided into four groups: (1) Control group, (2) regular diet with glucose,3) Only Artemia overfeeding and 4) Combined Artemia with glucose. We induced T2DM zebrafish using glucose monohydrate solution in water and repeated daily Artemia feeding. In this model, fasting blood glucose increase is preceded by obesity and glucose intolerance. The experiment lasted for two months. Blood glucose and fish biometrics were measured in two steps. The expression of TNFα, IFNγ, GLUT2 and Insulin genes were quantified by a Real-Time qPCR System (Applied Biosystems, USA) using a set of specific primers. The highest mortality rate was observed in combined Artemia and glucose (p < 0.05). We showed significantly higher expression of IL-1B and TNF-α as well as inhibitory cytokines such as IFNγ genes in overfeeding induced diabetes(OID) which was highest in the combined Artemia and glucose group.(p < 0.05)The GLUT2 gene expression was higher in the pure artemia group which decreased to a lower level by adding glucose to Artemia in the diet. (p < 0.05). Also, the lowest insulin gene expression was observed in the combined group (p < 0.05). In zebrafish, diabetes induction with overfeeding and supraphysiological glucose in diet accompanied with higher expression of inflammatory cytokines genes in the pancreas as well as lower insulin and GLU2 genes. These epigenetic factors appeared to initiate pancreatic beta dysfunction alongside insulin resistance and could have a crucial role in the pathogenesis of overfeeding-induced diabetes using primitive animal models.

Terahertz signatures and quantitative analysis of glucose anhydrate and monohydrate mixture

Glucose, as the main energy carrier and significant source of nutrition, generally comes in two available forms of anhydrate and monohydrate in commercial production. Considering their respective application occasions, proper identification of glucose in single composition or binary-mixture and quantification of the mixture are crucial in industry monitoring to guarantee merchandise quality. Simultaneously, public confusions of glucose are rather ubiquitous partly due to anhydrate and monohydrate with identical white crystalline appearance. In this paper, utilizing the molecular fingerprints of terahertz (THz) technology that are corresponding to structural characteristics of anhydrous and hydrated form, THz signatures of glucose anhydrate, monohydrate and their mixture, as well as THz spectral transformation from monohydrate to anhydrate with the dehydrating process are systematically studied. Some visible peaks of monohydrate were noted at 1.82 and 1.99 THz signifying the presence of hydrated structure. However, with the dehydrating process, the peaks related to the hydrated structure are not very apparent when the peaks at 1.44 and 2.08 THz appear due to changes in the molecular structure of anhydrate, which provide clear indication for hydrogen-bond network reconstruction at the micro level. Furthermore, characteristic peaks at 1.44 and 1.82 THz can be specified as the main quantitative indicators for quantitative detection. The linear relationships between the amplitudes of characteristic peaks and the percentage compositions of anhydrate and monohydrate are revealed. Three commercially available brands of edible glucose powder A, B, C were effectively identified by THz signatures. While powder C was recognized as binary-mixture and the proportion of anhydrate and monohydrate was further quantified. THz spectroscopy technology has advantages of direct recognition, simple quantitative model based on THz absorption peaks, and no need for complicated chemical treatment. It may be potentially shed light on industrial monitoring of glucose production and other related mixture in the future.

COMPARISON OF ANTIHYPERGLYCEMIC ACTIVITY OF DIFFERENT PARTS OF KLUTUK BANANA (MUSA BALBISIANA COLLA)

Objective: Banana is a plant that grows in Indonesia and is widely consumed by Indonesian people. One of banana type is klutuk banana (Musa balbisiana Colla). There were many types of researches about klutuk banana for antidiabetic activity; however, antidiabetic activity of its peel and pulp are still unknown.&#x0D; Methods: The objective of the study was to determine of antihyperglycemic activity of different parts of klutuk banana. Animals were divided into 15 groups, namely normal control, negative control, positive control (glibenclamide 0.65 mg/kg body weight (bw), and 12 sample groups. All animals were given 2 g/kg bw glucose monohydrate and blood glucose level was measured every 30 min for 120 min.&#x0D; Results: The results of the oral glucose tolerance test (OGTT) showed that KPE2 (klutuk peel extract 350 mg/kg bw) gave higher activity to decrease blood glucose level compared to the other groups at the minute of 30 (-24.83%; p. 0.00), 60 (-33.93%; p. 0.000), 90 (-46.29%; p. 0.000) and 120 (-35.44%; p. 0.000).&#x0D; Conclusion: The klutuk peel extract has very strong antioxidant activity and antihyperglycemic activity at a dose of 350 mg/kg bw.

Clean Production of Levulinic Acid from Fructose and Glucose in Salt Water by Heterogeneous Catalytic Dehydration.

Levulinic acid (LA) is considered to be one of the promising organic bio-platform chemicals and intermediates for the synthesis of fuels, chemicals, and polymers. In the present study, heterogeneous catalytic dehydration of hexose sugars, fructose and glucose, using a strong cation exchange resin (hydrogen form) as an acid catalyst, was performed to produce LA in an aqueous medium. The effect of salts such as NaCl, KCl, CaCl2, Na2CO3, and Na2SO4 in the medium on the rate of sugar conversion and LA yield was evaluated. Under optimum reaction conditions, 10% (w/w) fructose was dehydrated to LA (with 74.6% yield) in 10% (w/w) NaCl aqueous solution in 24 h at 110 °C using the catalyst at 30% (w/w sugar). Even 10% (w/w) glucose monohydrate was directly dehydrated to LA (with 70.7% yield) under similar conditions but at 145 °C. This study shows that the salts enhance the rate of catalytic dehydration in the order of Cl– > CO32– > SO42–. Thus, the combination of high sugar concentration and heterogeneous catalysis in an aqueous system under relatively mild conditions could provide a high-yielding and sustainable process for bio-based LA production.

Synthesis of Li2FeSiO4/C composite cathode material for Li-ion batteries and influence of dispersion effect on electrochemical characteristics

In this work, a next generation of perspective cathode material for Li-ion batteries Li2FeSiO4/C composite was synthesized by the sol-gel method, followed by heat treatment. Glucose monohydrate was used as a reducing agent and a soot-forming additive. The influence of morphology and particle size on the electrochemical characteristics of the cathode material after grinding in a bead attritor are shown. Discharge capacity at current 0.1 C was equaled 137 mAhg−1, after 100 charge-discharge cycles the capacity was 112 mAhg−1. Cyclic voltamperometry was demonstrated better electrochemical reactions in Li2FeSiO4/C after additional shredding of initial materials, the specific capacitance of a sample during a discharge with currents of 0.5C, 1C, and 2C was also demonstrated.

Review of FIGO &amp; ADA, WHO, IADPSG Guidelines for GDM for Low Resource Setting and Integration of DIPSI with MOHFW Govt of India, Guidelines

OGTT is performed in pregnant women by measuring the plasma glucose in fasting or non-fasting after 2-hour ingesting 75 grams of glucose (Monohydrate Dextrose Anhydrous). For diagnosing gestational diabetes (GDM) Indian Guidelines (DIPSI Test) are simple and can be done easily in low resource setting where large number of pregnant women visit for ANC check-up. The severity of GDM increases because of the action of insulin is diminished (insulin resistance) due to raised hormone secretion by the placenta. Other risk factors for GDM are being elderly, increased BMI, or obesity, weight gain in pregnancy, history of diabetes in family, stillbirth or a congenital abnormality in previous deliveries. GDM has previously been considered to be transient during pregnancy and resolve after pregnancy but, pregnant women with hyperglycaemia are at higher risk of developing GDM in subsequent pregnancies and about half of the women with a history of GDM will develop type II Diabetes within five to ten years after delivery. DIPSI simple testing protocol is endorsed by the National Health Mission (GOI) Guideline on GDM, and also endorsed by the FIGO guideline on HIP for use in South Asia. This testing protocol has been followed by Sri Lanka, Pakistan and Bangladesh in the region. Tamil-Nadu state and Uttar Pradesh states in India launched a Universal GDM Program in 2007 and 2016 respectively, covering all pregnancies by testing and managing GDM with MNT, Metformin and Insulin in most of health care facilities. Around 28,000 ANM have been given glucometers, strips, glucose 75 gm packets for implementation of the largest GDM program in Uttar Pradesh, India to date.

Production of 11C and 18F Isotopes. Getting the “Glucose, 11C “ Radiopharmaceutical

The results of the photonuclear production of 11C and 18F isotopes in various target-matrices are summarized. The studies were performed using linear electron accelerators of the R&amp;DE "Accelerator" NSC KIPT NAS of Ukraine in the energy range 10 -40 MeV to determine the possibilities of obtaining the maximum achievable activity levels of 11C isotopes, and 18F with a view to planning further developments on the creation of radiopharmaceutical for these nuclear isotopes. In the framework of the above approach, we measured the activity levels of the 18F which is transferred to the surrounding aquatic environment during irradiation of targets-matrices of fluoroplastic (C2F4) with bremsstrahlung flux. The release of the 18F isotope into the aquatic environment under the most favorable conditions (in terms of energy and average beam current) was 3.6% of the target-matrices activity - 40 MBq/g, which is a very low figure. Despite the encouraging value of the specific activity of 18F isotope in lithium fluoride (LiF) -77 MBq/g target–matrices and hydrofluoric acid (HF) - close to 100 MBq/g, the process of extracting 18F from C2F4, LiF and HF as basis of the radiopharmaceutical is not sufficiently effective and brings into question the feasibility of such a methodology for producing 18F isotope for further use. More efficient was the production of the 11C isotope in the irradiated target-matrix of the standard therapeutic form "glucose monohydrate" (glucose). It was shown that, as a result of irradiation of glucose with a gamma-quanta beam, it is possible to “label” glucose with the 11C isotope, which is formed as a result of the photonuclear reaction 12C(γ, n)11C at the 12C nucleus, which is part of the glucose molecule C6H12O6 ×H2O. Irradiated sample of glucose dissolved in a given volume of solvent (distilled water) will be ready for use radiopharmaceutical "Glucose, 11C". It has been shown that the “photonuclear method” provides for obtaining the “Glucose, 11C” radiopharmaceutical complex with total activity necessary for performing PET diagnostics. The radiopharmaceutical "Glucose, 11C" by the time of its use has 100% radionuclide purity. “Glucose, 11C” obtained in this way was produced for the first time. The choice of the optimal design of a water-cooled target station, providing a moderate (in terms of heat loads) mode of irradiation of a capsule filled with glucose tablets, is discussed. Using the program “SolidWorks FlowSimulation 2011”, the quantitative characteristics of the flow rates of water flowing around the glucose capsule and the converter are calculated.

One-pot path for the synthesis of hollow zirconia sub-microspheres using hydrothermal approach

The present study focused on the synthesis of hollow zirconia sub-microspheres through simple one-pot hydrothermal approach. First, autoclaving zirconyl chloride octahydrate as the oxide precursor and glucose monohydrate as the sacrificial template together at 180 °C for 20 h resulted in an in-situ formation of core@shell composite. Thereafter, calcination of the composite at 550 °C for 4 h was lead to the removal of the template and the formation of the hollow spheres. Results inferred from the XRD, TEM, SEM and IR analysis revealed that hollow zirconia sub-microspheres were readily produced with diameter approximately of 400 nm and the walls of the hollow spheres composed of ZrO2 nanocrystalline particles with a size of 8 nm.

Influence of Li:Fe molar ratio on the performance of the LiFePO4/C prepared by high temperature ball milling method

LiFePO4/C cathode material for lithium ion battery was prepared with lithium dihydrogen phosphate, iron oxide, and glucose monohydrate as raw materials. In an attempt to improve the electrochemical performance, the influence of Li:Fe molar ratio was investigated in this paper. Experimental results showed that the best electrochemical performance of LiFePO4/C was reached in this study, when Li:Fe molar ratio was 1.03:1 synthesized preheated ball milling temperature at 300°C for 1h, and then ball milling temperature at 650°C for 8h, at the rates of 0.1, 0.5, 1.0, 2.0, 5.0 and 10C, the initial discharge capacities of 157 (±2), 151 (±2), 144 (±2), 136 (±2), 119 (±2), 102 (±2) mAhg−1, respectively. Moreover, after 50cycles, at rate of 0.1C, the capacity of LiFePO4/C sample was 155 (±2) mAhg−1, and its capacity retention rate achieve 99.5%.

Synthesis and Characterization of Composite Hydroxyapatite-Silver Nanoparticles

Hydroxyapatite (HAp) is commonly used as bone implant coating recently; however, the material has disadvantage such as lack of antibacterial properties, that can cause an bacterial infection. Addition of silver nanoparticles is expected to be able to provide antibacterial properties. Silver nanoparticles was obtained by reduction of AgNO3 using glucose monohydrate with microwave heating at 100p for 4 minutes. The composite of hydroxyapatite-silver nanoparticles was synthesized using chemical methods by coprecipitation suspension of Ca(OH)2 with (NH4)HPO4, followed by adding silver nanoparticles solution. The size of the synthesized silver nanoparticles was 30-50 nm and exhibited good antibacterial activity. Nevertheless, when it was composited with HAp to form HAp-AgNPs, there was no antibacterial activity due to very low concentration of silver nanoparticles. This was indicated by the absence of silver nanoparticles diffraction patterns. Infrared spectra indicated the presence of chemical shift and the results of scanning electron microscope showed size of the HAp-AgNPs composite was smaller than that of the HAp. This showed the interaction between HAp and the silver nanoparticles.