Anomalous behavior induced by water insertion in Molybdenum disulfide nanoflowers

The coexistence of negative photoconductivity and metallic-like behavior in conventional semiconductors is very uncommon. In this work, we report the existence of such unconventional physical properties in Molybdenum disulfide nanoflowers (MoS2-NF). This is achieved by making the surface of MoS2 hygroscopic by alcohol treatment and creating a transport channel that favors protonic over electronic conduction. On cooling the MoS2-NF in a heat sink, the excess water that condenses on the surface forms a proton (H3O+) wire which exhibits pinched hysteresis characteristics. The conductivity of MoS2 increased by two orders of magnitude in the proton-dominated conduction regime with an exceptionally high positive temperature coefficient of 1.3×104 Ω/K. Interestingly, MoS2-NF also exhibits strong negative photoresponse (NPC) at room temperature when illuminated with UV and infra-red radiation. This interesting behavior observed in MoS2 NF can be useful for energy harvesting applications and the realization of fast thermal memories and optical switches.

The effectiveness of complex treatment of acute catarrhal mastitis in cows

The article presents data on the study of the therapeutic efficacy of methods for treating cows with acute catarrhal mastitis. The research was carried out on the basis of 2 cattle farms SPK (collective farm) "Kolos" Myasnikovsky district of Rostov region and individual entrepreneur Head of the peasant (farm) farm AA Berekchiyan Myasnikovsky district of the Rostov region, as well as on the basis of the North Caucasian zonal research veterinary institute - a branch of the Federal State Budgetary Institution "Federal Rostov Agrarian Scientific Center". To study the therapeutic efficacy of the treatment regimen for acute catarrhal mastitis, 2 groups of animals (experimental and control) were also formed according to the principle of analogous pairs, 15 animals each. Control cows were injected with the antibacterial drug amoxicillin LA 15% twice with an interval of 48 hours at the rate of 1 ml of the drug per 10 kg of animal body weight. The drug was administered fractionally, divided into 2 injections. The animals of the experimental group were also injected with the semisynthetic antibiotic amoxicillin LA 15% twice with an interval of 48 hours at the rate of 1 ml of the drug per 10 kg of the animal's body weight. The treatment regimen was supplemented by exposing the animal's body to pulsed low-intensity infrared laser radiation with simultaneous exposure to pulsed incoherent infrared and red radiation and a constant magnetic field in the infiltrate area once a day at the rate of 5 minutes per 10 cm2 of the affected area for 5-7 days. In the course of our research, it was found that therapy for catarrhal mastitis using pulsed low-intensity infrared laser radiation with simultaneous exposure to pulsed incoherent infrared and red radiation and a constant magnetic field in the infiltrate area once a day, as well as the semisynthetic antibiotic amoxicillin LA 15% twice with at intervals of 48 hours showed a high degree of effectiveness. This is confirmed by the rapid recovery of the clinical picture, physiological parameters, and morphological data of the blood of experimental animals. The therapeutic efficiency of the proposed method of treatment was 100%, recovery occurred on average in 3.9 ± 0.15 days. The signs of the inflammatory process disappeared gradually, however, by the 3rd day of treatment, the secretion of milk was completely restored and a significant improvement in the condition of the animals was noted.

Effectiveness of Infrared Radiation, in healing of diabetic ulcer foot at MAPIMS

Introduction: Diabetes is the non-communicable chronic health issue that affects people in the world wide. Studies shows that India is the second largest diabetes populated country in the world. Long standing uncontrolled diabetes leads to many systemic complications; diabetic ulcer foot is one among them that result in loss of foot or amputation and in severe cases even death. Objectives: this study investigated the pre and post test level would healing with infra-red radiation and also compared pre and post test mean score and found the demographic influences of the diabetic clients. Materials and methods: in a quantitative pre experimental one group pre-test post test design 75 diabetic ulcer foot clients who met the sampling criteria were included as sample. Consecutive sampling method was used to select the sample as they report to OPD or admitted as inpatient. Following pre-test Infra-red radiation was applied for 10 days and the post test was done seventh and tenth day. Result: The pre test mean and standard deviation were 51.5067 and 4.21828 respectively and the post test mean and standard deviation were 20.32 and 3.673 respectively. The” t” value was 68.352. Client’s demographic variables like education and occupation had significant influences in the wound healing process.

Mn4+ concentration effect on spectral properties of lithium-germanate glass-ceramics

A series of lithium-germanate glasses with different manganese concentration is synthesized. Li2Ge7O15 nanocrystals nucleate in the glass matrix via standard volume crystallization technique thus obtaining lithium-germanate glass-ceramics. The glass-ceramics possess intense emission near 660-670 nm under two-band excitation at 330 and 450 nm. The luminescence lifetime is 550 μs for 0.05 mol.% MnO2-doped glass-ceramics. The glass-ceramics obtained can be used as a source of deep-red radiation.

Assessment of quality of life and psychoemotional state of patients with psoriasis against the background of standard medicamentous therapy and the differentiated photochromotherapy use

Background. Psoriasis is a systemic disease with the presence of comorbid pathology, which is the cause of serious psychological problems. The aim of the study was to assess the quality of life and psychoemotional status of patients with psoriasis against the background of standard drug therapy with the inclusion of photochromotherapy (PCT). Methods. The randomized controlled study included 144 patients (mean age 48.34 13.51 years) with psoriasis in the advanced stage. Patients, depending on the method of treatment, were divided into 4 groups, comparable by clinical and functional characteristics. For all groups, standard drug treatment was prescribed, including antiinflammatory, hyposensitizing, detoxification and external therapy, while additionally for 10 days, patients of the 2nd group (n = 47) received PCT with narrow-band optical radiation (NOR) 540 nm, patients of the 3rd group (n = 48) PCT with NOR 650 nm, patients of the 4th group (n = 21) imitation of PCT (placebo). Patients of the 1st group (n = 28) received only standard treatment. Results. The positive effect of NOR 540 nm on the psychoemotional state and NOR 650 nm on the quality of life of patients with psoriasis has been demonstrated. Conclusion. Thus, taking into account the significant positive effect of green radiation (NOR 540 nm) on the indicators of the psychoemotional state of patients with psoriasis in the advanced stage and the positive effect of red radiation (NOR 650 nm) on the indices of integral dermatological index of quality of life (improving the quality of life), NOR with these wavelengths can be recommended in the complex therapy of patients with exacerbation of psoriasis to increase the overall effectiveness of treatment.

Supplementary Far-Red Light Did Not Affect Tomato Plant Growth or Yield under Mediterranean Greenhouse Conditions

In the Mediterranean region, tomato plants are often cultivated in two short cycles per year to avoid the heat of summer and the low solar radiation of winter. Supplementary light (SL) makes it possible to cultivate during the dark season. In this experiment, a tomato F1 hybrid cultivar DRW7723 was cultivated in a greenhouse for a fall-winter cycle. After transplant, light emitting diode (LED) interlighting, with two light spectra (red + blue vs. red + blue + far-red) was applied as SL. Plant growth, yield, gas exchange, nutrient solution (NS) consumption, and fruit quality were analyzed. In general, the effects of adding far-red radiation were not visible on the parameters analyzed, although the yield was 27% higher in plants grown with SL than those grown without. Tomatoes had the same average fresh weight between SL treatments, but the plants grown with SL produced 16% more fruits than control. Fruit quality, gas exchange and NS uptake were not influenced by the addition of far-red light. Interlighting is, therefore, a valid technique to increase fruit production in winter but at our latitude the effects of adding far-red radiation are mitigated by available sunlight.

State-of-the-art and prospects for intense red radiation from core–shell InGaN/GaN nanorods

Core–shell nanorods (NRs) with InGaN/GaN quantum wells (QWs) are promising for monolithic white light-emitting diodes and multi-color displays. Such applications, however, are still a challenge because intensity of the red band is too weak compared with blue and green. To clarify this problem, we measured photoluminescence of different NRs, depending on power and temperature, as well as with time resolution. These studies have shown that dominant emission bands come from nonpolar and semipolar QWs, while a broad yellow-red band arises mainly from defects in the GaN core. An emission from polar QWs located at the NR tip is indistinguishable against the background of defect-related luminescence. Our calculations of electromagnetic field distribution inside the NRs show a low density of photon states at the tip, which additionally suppresses the radiation of polar QWs. We propose placing polar QWs inside a cylindrical part of the core, where the density of photon states is higher and the well area is much larger. Such a hybrid design, in which the excess of blue radiation from shell QWs is converted to red radiation in core wells, can help solve the urgent problem of red light for many applications of NRs.