"V"-Shaped Changing Electronic Performance of Iodinene-Based Nanoflakes as a Function of Width.

Special structures and prominent performance make 2D iodinene more appealing and valuable at the molecular level. Here, new-type electronic devices have been constructed with iodinene-based nanoflakes in different sizes and are theoretically studied for electronic transport properties. Our findings reveal that iodinene-based nanoflakes possess great electron transport suppression, achieving the same function as SiO on single molecule scale.

Micromechanical and Tribological Performance of Laser-Cladded Equiatomic FeNiCr Coatings Reinforced with TiC and NbC Particles.

This paper discusses a comparative micromechanical and tribological analysis of laser-cladded equiatomic FeNiCr coatings reinforced with TiC and NbC particles. Two types of coatings, FeNiCr-TiC (3 wt.% TiC) and FeNiCr-NbC (3 wt.

Size- and Voltage-Dependent Electron Transport of CN-Rings-Based Molecular Chains.

CN-ring-based molecular chains were designed at the molecular level and theoretically demonstrated to show distinctive and valuable electron transport properties that were superior to the parent carbonaceous system and other similar nanoribbon-based molecular chains. This new -type molecular chain presented an exponential attenuation of the conductance and electron transmission with the length. Essentially, the molecular chain retained the electron-resonant tunneling within 7 nm and the dominant transport orbital was the LUMO.

Tunable Electronic Transport of New-Type 2D Iodine Materials Affected by the Doping of Metal Elements.

2D iodine structures under high pressures are more attractive and valuable due to their special structures and excellent properties. Here, electronic transport properties of such 2D iodine structures are theoretically studied by considering the influence of the metal-element doping. In equilibrium, metal elements in Group 1 can enhance the conductance dramatically and show a better enhancement effect.

Influence of β-Stabilizer Element on Microstructure and Mechanical Behavior of Porous Titanium Alloy Synthesized by Liquid Metal Dealloying.

The metallic implant materials for load-bearing applications typically possess a significantly higher stiffness when compared with that of human bone. In some cases, this stiffness mismatch leads to a stress-shielding effect and eventual loosing of the implant. Porous metallic materials are suitable candidates to overcome this problem.

Mechanical and Structural Characterization of Laser-Cladded Medium-Entropy FeNiCr-BC Coatings.

Equiatomic medium-entropy alloy (MEA) FeNiCr-BC (0, 1, and 3 wt.% BC) coatings were deposited onto an AISI 1040 steel substrate using pulsed laser cladding. Based on an SEM microstructural analysis, it was found that the cross-sections of all the obtained specimens were characterized by an average coating thickness of 400 ± 20 μm, a sufficiently narrow (100 ± 20 μm) "coating-substrate" transition zone, and the presence of a small number of defects, including cracks and pores.

Optical counterpart of a Foucault pendulum.

The twin beam vortex interferometer with a phase-conjugating mirror in a rotating reference frame is analyzed. The circular motion of the interference pattern occurs due to the exchange of angular momenta between photons and the interferometer. Using the concept of the ideal phase-conjugating mirror, it is shown that the motion of the helical interference pattern of interacting vortex photons with topological charge may be used for detection of slow rotations.

Geological-Geophysical and Oceanographic Research in the Sea of Japan, Tatar Strait, on Cruise 61 of the R/V .

The paper presents brief results of comprehensive studies of the water area of the Tatar Strait and Sea of Japan obtained on cruise 61 of the R/V "" in November-December 2020. The bottom relief and geophysical and gas-geochemical fields were refined, and new features of the geochemistry and mineralogy of bottom sediments were revealed.

Surface Functionalization of Biomedical Ti-6Al-7Nb Alloy by Liquid Metal Dealloying.

Surface functionalization is an effective approach to change the surface properties of a material to achieve a specific goal such as improving the biocompatibility of the material. Here, the surface of the commercial biomedical Ti-6Al-7Nb alloy was functionalized through synthesizing of a porous surface layer by liquid metal dealloying (LMD). During LMD, the Ti-6Al-7Nb alloy is immersed in liquid magnesium (Mg) and both materials react with each other.

[Early correction of hypospadias in girl with a disorder of sex development. clinical case].

The presented clinical case of a girl with a salt-wasting form of congenital adrenal hyperplasia in combination with chronic recurrent infection and lower urinary tract dysfunction demonstrates the need to change conventional two-staged approach to surgical feminization in favor of a one-stage intervention in order to prevent a progression of genitourinary complications. After controlling for the underlying condition, the one-stage feminization was performed, including modified tightening introitoplasty using a Passerini-Glazel flap and a correction of hypertrophic clitoris and labia minora. Good short- and long-term results were achieved.

Genes associated with testicular germ cell tumors and testicular dysgenesis in patients with testicular microlithiasis.

Testicular microlithiasis (TM) is one of the symptoms of testicular dysgenesis syndrome (TDS). TM is particularly interesting as an informative marker of testicular germ cell tumors (TGCTs). KIT ligand gene (KITLG), BCL2 antagonist/killer 1 (BAK1), and sprouty RTK signaling antagonist 4 (SPRY4) genes are associated with a high risk of TGCTs, whereas bone morphogenetic protein 7 gene (BMP7), transforming growth factor beta receptor 3 gene (TGFBR3), and homeobox D cluster genes (HOXD) are related to TDS.

Open porous dealloying-based biomaterials as a novel biomaterial platform.

The close match of stiffness between implant material and bone is critically important to avoid stress-shielding effect and ensure a fast healing of injured tissues. Here, we introduce liquid metal dealloying method for synthesis of robust open porous biomaterials possessing low Young's modulus. The remarkable advantage of the liquid metal dealloying method is a large flexibility in selecting chemical composition of a desired porous biomaterial together with unique tunable microstructure.

Coherent chirped pulse laser network with Mickelson phase conjugator.

The mechanisms of nonlinear phase-locking of a large fiber amplifier array are analyzed. The preference is given to the most suitable configuration for a coherent coupling of thousands of fundamental spatial mode fiber beams into a single smooth beam ready for chirped pulse compression. It is shown that a Michelson phase-conjugating configuration with double passage through an array of fiber amplifiers has the definite advantage compared to a one-way fiber array coupled in a Mach-Zehnder configuration.

[Possibilities of ultrasonography in the diagnosis of sex differentiation disorders in children].

Ninety-five children with different forms of hermaphroditism aged 3 months to 14 years were examined to assess the potentialities of echography. Ultrasonic examinations of the kidneys, adrenals, pelvic organs (with full bladder, during and after miction), scrotum, and inguinal area were carried out. Echographic picture of urogenital organs in mixed ovarian dysgenesis, congenital deficiency of testosterone biosynthesis or metabolism due to enzymatic deficit, testicular feminization, congenital adrenocortical dysfunction was analyzed and criteria of differential diagnosis of these conditions discussed.

[Evaluation of the long-term results of the surgical treatment in patient with vaginal aplasia in the presence of functioning uterus].

Results of surgical treatment of 28 adolescent girls with vaginal aplasia and functioning uterus are analyzed. The uterus had to be removed in all the patients 1.5 to 6 months after abdominal colpopoiesis with preservation of functioning uterus; after sigmoidal colpopoiesis the uterus was preserved in 85% of patients.

[Sex-change operations in disorders of the reproductive organs].

The authors analyze the experience gained in the surgical treatment of more than 5300 patients aged 2 days to 42 years, suffering from various abnormalities of the reproductive organs. They describe the surgical policy in sex-transforming surgery (masculinizing or feminizing plasty of the genitals) and give recommendations on rehabilitation of the patients with involvement of the reproductive system organs in the postoperative period.

[Rectosigmoid vaginoplasty in children and adolescents].

The authors analyze the results of vaginal plasty with grafts from the rectosigmoid portion of the large intestine, carried out in 279 girls aged 3 to 18 with abnormalities of the genitals and vaginal aplasia, including that with a functioning uterus. They have developed new modifications of such surgery, that facilitate sexual social adaptation of the patients when they reach puberty.

[Modified technique of the Ivanissevich operation for varicocele in children].

On the basis of the results of rheotesticulographic studies in 38 children with left-sided II-III degree varicocele, the impairment in hemodynamics in the testicle at the involved side was established. No suppression of androgen function of the organ was revealed. The expediency to perform in patients of pediatric and young age the Ivanissevich operation, the effectiveness of which is increased in use of intraoperative phlebotesticulography was noted.

[Venography in the evaluation of the results of surgical treatment of varicocele in children].

The paper is concerned with analysis of the results of intraoperative phlebotesticulography, performed in 50 patients with varicocele of degree I-II during Ivanissevich's operation. The effect of surgical intervention was shown to depend upon the quality of ligation of the testicular vein, some parts of which are anastomosed between themselves. The localization of this anastomosis is revealed by means of intraoperative phlebotesticulography, which permits increasing the results of surgical treatment and predicting a course of a postoperative period.

[Surgical treatment of diseases of the genitalia and disorders of sexual development].

The experience with the treatment of more than 5140 children at the age of from 2 days to 16 years, and 76 patients at the age of from 15 to 42 years with different diseases of the genital organs and disorders in the sex formation is presented. The indications for surgical treatment are defined. The results of the masculinizing operations, including the phalloplasty and testicular endoprosthesis, and the feminizing ones, including the vaginoplasty with the use of a colonic segment are presented.

[Possibilities of surgical treatment of lesions of the organs of the reproductive system and disorders of sexual development].

The authors describe the data on clinico-laboratory and instrumental examinations and surgical treatment of about 5,000 children with different reproductive organ injuries including complex patterns of abnormal sexual differentiation. The designed diagnostic programs made it possible to distribute patients into groups and according to the disease entities in conformity with the classification suggested. It is emphasized that in the developing science concerned with sex, it is necessary to distinguish an area pertaining to childhood, namely pediatric andrology, and to delineate its subject matter and tasks.