Effects of precocene I and II on the sensory system of antennae and mouthparts of Colorado potato beetle larvae, Leptinotarsa decemlineata (Col.: Chrysomelidae)

The chrysomelid species Leptinotarsa decemlineata (Say), commonly known as Colorado potato beetle (CPB), is an important pest of potato and other solanaceous crops. The effects of precocene I and II, juvenile hormone inhibitors, on morphological characteristics of the chemoreceptor organs of antennae and mouthparts of L. decemlineata larvae were studied in the laboratory. Different doses of precocenes were applied on the CPB second-instar larvae. The results showed that precocene caused changes in the form and number of sensilla of the antennae and maxilla-labial complex. The treatment of second-instar larvae by precocene I and II, considerably changed the cuticular structure of antennae and labio-maxillary palps after the first molt. In addition, other anomalies such as remaining of the previous instar cuticle, degeneration of some or whole sensilla on the second and third antennal segments and on the terminal segment of labio-maxillary palps, and reduction of both receptor cells and their dendrites were observed. The effects of precocenes on the insect sensory system and disturbance of chemical recognition of host plants and environment are discussed

Morphology and ultrastructure of chemosensory sensilla of labio-maxillary complex in the Colorado potato beetle, Leptinotarsa decemlineata (Col.: Chrysomelidae), larvae

The Colorado potato beetle, Leptinotarsa decemlineata (Say), is a destructive insect pest of potato and other solanaceous crops. The type, number and distribution of sensory receptors on the labio-maxillary complex of larvae were studied using the scanning and transmission electron microscopy. A total of 32 sensilla were identified on the maxillary and labial palps that were categorized in three basic morphological types: basiconica, trichoid, and digitiform. The maxillary palp had 16 basiconica, four trichoid and one digitiform sensilla, and the labial palp included 11 basiconica sensilla. All basiconica sensilla were on the distal apex of the palp segment. The basiconica sensilla are innervated by 2-6 neurons and function as a gustatory receptor. In addition, three trichoid sensilla were on the distal side of the second segment, one trichoid sensillum on the lateral side of the third segment and one digitiform sensillum on the lateral side of the third segment of maxillary palp. Trichoid sensilla are equipped with 4-6 receptor cells and function as chemo- and mechanoreceptors

The role of additional correction methods of insufficient adherence to treatment for effective blood pressure control in patients with resistant arterial hypertension

The article considers the results of applying the different correction methods of insufficient adherence to treatment in patients with resistant and pseudo-resistant arterial hypertension on the background of the optimization of antihypertensive therapy in the effective blood pressure control by a doctor and a patient

Ergodicity of certain cocycles over certain interval exchanges

We show that for odd-valued piecewise-constant skew products over a certain two parameter family of interval exchanges, the skew product is ergodic for a full-measure choice of parameters

Echinococcosis at urology. Pelvic parasitic cyst. Case report

Introduction. Echinococcosis is a serious chronic parasitic disease. Early diagnostics and patients` treatment with echinococcal lesions is an up-to-date problem. Objective. The aim of the article is to present the clinical case of diagnostics and treatment of the patient with urological complications caused by parasitic echinococcal pelvic cyst. Clinical case. The article highlights the features of diagnostics and treatment of urological complications of pelvic echinococcal lesions. The patient was operated in volume: "Laparotomy. Resection of parasitic cyst of small pelvic cavity. Echinococcectomy of the liver, abdominal cavity, retroperitoneal space." The peculiarities of operation was highlighted. The postoperative period lasted without complications. Conclusions. The demonstrated clinical case points out the necessity of the dispanserisation, early diagnostics and special helminth treatment of the patients living in the endemic regions. It allows to prevent the appearance of the echonococcosis advanced cases that lead to the reoperations and frequent patients` disability

Toxicity bioassay of waste cooking oil-based biodiesel on marine microalgae

The world biodiesel production is increasing at a rapid rate. Despite its perceived safety for the environment, more detailed toxicity studies are mandatory, especially in the field of aquatic toxicology. While considerable attention has been paid to biodiesel combustion emissions, the toxicity of biodiesel in the aquatic environment has been poorly understood. In our study, we used an algae culture growth-inhibition test (OECD 201) for the comparison of the toxicity of B100 (pure biodiesel), produced by methanol transesterification of waste cooking oil (yellow grease), B0 (petroleum diesel fuel) and B20 (diesel-biodiesel blended of 20% biodiesel and 80% petroleum diesel fuel by volume). Two marine diatoms Attheya ussuriensis and Chaetoceros muelleri, the red algae Porphyridium purpureum and Raphidophyte Heterosigma akashiwo were employed as the aquatic test organisms. A sample of biodiesel from waste cooking oil without dilution with petroleum diesel (B100) showed the highest level of toxicity for the microalgae A. ussuriensis, C. muelleri and H. akashiwo, compared to hexane, methanol, petroleum diesel (B0) and diluted sample (B20). The acute EC50 in the growth-inhibition test (96 h exposure) of B100 for the four species was in the range of 3.75–23.95 g/L whereas the chronic toxicity EC50 (7d exposure) was in the range of 0.42–16.09 g/L

Identification of cement in atmospheric particulate matter using the hybrid method of laser diffraction analysis and Raman spectroscopy

Environmental science; Atmospheric science; Ecology; Environmental chemistry; Environmental pollution; Atmospheric particulate matter, Laser diffraction analysis, PM10, Raman spectroscop